1 // TODO key loading, generating, saving
10 cvar_t crypto_developer = {CVAR_SAVE, "crypto_developer", "0", "print extra info about crypto handshake"};
11 cvar_t crypto_servercpupercent = {CVAR_SAVE, "crypto_servercpupercent", "10", "allowed crypto CPU load in percent for server operation (0 = no limit, faster)"};
12 cvar_t crypto_servercpumaxtime = {CVAR_SAVE, "crypto_servercpumaxtime", "0.01", "maximum allowed crypto CPU time per frame (0 = no limit)"};
13 cvar_t crypto_servercpudebug = {CVAR_SAVE, "crypto_servercpudebug", "0", "print statistics about time usage by crypto"};
14 static double crypto_servercpu_accumulator = 0;
15 static double crypto_servercpu_lastrealtime = 0;
16 cvar_t crypto_aeslevel = {CVAR_SAVE, "crypto_aeslevel", "1", "whether to support AES encryption in authenticated connections (0 = no, 1 = supported, 2 = requested, 3 = required)"};
17 int crypto_keyfp_recommended_length;
18 static const char *crypto_idstring = NULL;
19 static char crypto_idstring_buf[512];
21 #define PROTOCOL_D0_BLIND_ID FOURCC_D0PK
22 #define PROTOCOL_VLEN (('v' << 0) | ('l' << 8) | ('e' << 16) | ('n' << 24))
24 // BEGIN stuff shared with crypto-keygen-standalone
25 #define FOURCC_D0PK (('d' << 0) | ('0' << 8) | ('p' << 16) | ('k' << 24))
26 #define FOURCC_D0SK (('d' << 0) | ('0' << 8) | ('s' << 16) | ('k' << 24))
27 #define FOURCC_D0PI (('d' << 0) | ('0' << 8) | ('p' << 16) | ('i' << 24))
28 #define FOURCC_D0SI (('d' << 0) | ('0' << 8) | ('s' << 16) | ('i' << 24))
29 #define FOURCC_D0IQ (('d' << 0) | ('0' << 8) | ('i' << 16) | ('q' << 24))
30 #define FOURCC_D0IR (('d' << 0) | ('0' << 8) | ('i' << 16) | ('r' << 24))
31 #define FOURCC_D0ER (('d' << 0) | ('0' << 8) | ('e' << 16) | ('r' << 24))
32 #define FOURCC_D0IC (('d' << 0) | ('0' << 8) | ('i' << 16) | ('c' << 24))
34 static unsigned long Crypto_LittleLong(const char *data)
37 ((unsigned char) data[0]) |
38 (((unsigned char) data[1]) << 8) |
39 (((unsigned char) data[2]) << 16) |
40 (((unsigned char) data[3]) << 24);
43 static void Crypto_UnLittleLong(char *data, unsigned long l)
46 data[1] = (l >> 8) & 0xFF;
47 data[2] = (l >> 16) & 0xFF;
48 data[3] = (l >> 24) & 0xFF;
51 static size_t Crypto_ParsePack(const char *buf, size_t len, unsigned long header, const char **lumps, size_t *lumpsize, size_t nlumps)
60 if(Crypto_LittleLong(buf) != header)
64 for(i = 0; i < nlumps; ++i)
68 lumpsize[i] = Crypto_LittleLong(&buf[pos]);
70 if(pos + lumpsize[i] > len)
78 static size_t Crypto_UnParsePack(char *buf, size_t len, unsigned long header, const char *const *lumps, const size_t *lumpsize, size_t nlumps)
87 Crypto_UnLittleLong(buf, header);
90 for(i = 0; i < nlumps; ++i)
92 if(pos + 4 + lumpsize[i] > len)
94 Crypto_UnLittleLong(&buf[pos], lumpsize[i]);
96 memcpy(&buf[pos], lumps[i], lumpsize[i]);
101 // END stuff shared with xonotic-keygen
107 #include <d0_blind_id/d0_blind_id.h>
109 #define d0_blind_id_dll 1
110 #define Crypto_OpenLibrary() true
111 #define Crypto_CloseLibrary()
113 #define qd0_blind_id_new d0_blind_id_new
114 #define qd0_blind_id_free d0_blind_id_free
115 //#define qd0_blind_id_clear d0_blind_id_clear
116 #define qd0_blind_id_copy d0_blind_id_copy
117 //#define qd0_blind_id_generate_private_key d0_blind_id_generate_private_key
118 //#define qd0_blind_id_generate_private_key_fastreject d0_blind_id_generate_private_key_fastreject
119 //#define qd0_blind_id_read_private_key d0_blind_id_read_private_key
120 #define qd0_blind_id_read_public_key d0_blind_id_read_public_key
121 //#define qd0_blind_id_write_private_key d0_blind_id_write_private_key
122 //#define qd0_blind_id_write_public_key d0_blind_id_write_public_key
123 #define qd0_blind_id_fingerprint64_public_key d0_blind_id_fingerprint64_public_key
124 //#define qd0_blind_id_generate_private_id_modulus d0_blind_id_generate_private_id_modulus
125 #define qd0_blind_id_read_private_id_modulus d0_blind_id_read_private_id_modulus
126 //#define qd0_blind_id_write_private_id_modulus d0_blind_id_write_private_id_modulus
127 #define qd0_blind_id_generate_private_id_start d0_blind_id_generate_private_id_start
128 #define qd0_blind_id_generate_private_id_request d0_blind_id_generate_private_id_request
129 //#define qd0_blind_id_answer_private_id_request d0_blind_id_answer_private_id_request
130 #define qd0_blind_id_finish_private_id_request d0_blind_id_finish_private_id_request
131 //#define qd0_blind_id_read_private_id_request_camouflage d0_blind_id_read_private_id_request_camouflage
132 //#define qd0_blind_id_write_private_id_request_camouflage d0_blind_id_write_private_id_request_camouflage
133 #define qd0_blind_id_read_private_id d0_blind_id_read_private_id
134 //#define qd0_blind_id_read_public_id d0_blind_id_read_public_id
135 #define qd0_blind_id_write_private_id d0_blind_id_write_private_id
136 //#define qd0_blind_id_write_public_id d0_blind_id_write_public_id
137 #define qd0_blind_id_authenticate_with_private_id_start d0_blind_id_authenticate_with_private_id_start
138 #define qd0_blind_id_authenticate_with_private_id_challenge d0_blind_id_authenticate_with_private_id_challenge
139 #define qd0_blind_id_authenticate_with_private_id_response d0_blind_id_authenticate_with_private_id_response
140 #define qd0_blind_id_authenticate_with_private_id_verify d0_blind_id_authenticate_with_private_id_verify
141 #define qd0_blind_id_fingerprint64_public_id d0_blind_id_fingerprint64_public_id
142 #define qd0_blind_id_sessionkey_public_id d0_blind_id_sessionkey_public_id
143 #define qd0_blind_id_INITIALIZE d0_blind_id_INITIALIZE
144 #define qd0_blind_id_SHUTDOWN d0_blind_id_SHUTDOWN
145 #define qd0_blind_id_util_sha256 d0_blind_id_util_sha256
146 #define qd0_blind_id_sign_with_private_id_sign d0_blind_id_sign_with_private_id_sign
147 #define qd0_blind_id_sign_with_private_id_sign_detached d0_blind_id_sign_with_private_id_sign_detached
148 #define qd0_blind_id_setmallocfuncs d0_blind_id_setmallocfuncs
149 #define qd0_blind_id_setmutexfuncs d0_blind_id_setmutexfuncs
150 #define qd0_blind_id_verify_public_id d0_bind_id_verify_public_id
151 #define qd0_blind_id_verify_private_id d0_bind_id_verify_private_id
155 // d0_blind_id interface
158 #define D0_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
160 #define D0_WARN_UNUSED_RESULT
164 typedef void *(d0_malloc_t)(size_t len);
165 typedef void (d0_free_t)(void *p);
166 typedef void *(d0_createmutex_t)(void);
167 typedef void (d0_destroymutex_t)(void *);
168 typedef int (d0_lockmutex_t)(void *); // zero on success
169 typedef int (d0_unlockmutex_t)(void *); // zero on success
171 typedef struct d0_blind_id_s d0_blind_id_t;
172 typedef D0_BOOL (*d0_fastreject_function) (const d0_blind_id_t *ctx, void *pass);
173 static D0_EXPORT D0_WARN_UNUSED_RESULT d0_blind_id_t *(*qd0_blind_id_new) (void);
174 static D0_EXPORT void (*qd0_blind_id_free) (d0_blind_id_t *a);
175 //static D0_EXPORT void (*qd0_blind_id_clear) (d0_blind_id_t *ctx);
176 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_copy) (d0_blind_id_t *ctx, const d0_blind_id_t *src);
177 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_generate_private_key) (d0_blind_id_t *ctx, int k);
178 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_generate_private_key_fastreject) (d0_blind_id_t *ctx, int k, d0_fastreject_function reject, void *pass);
179 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_read_private_key) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
180 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_read_public_key) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
181 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_write_private_key) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
182 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_write_public_key) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
183 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_fingerprint64_public_key) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
184 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_generate_private_id_modulus) (d0_blind_id_t *ctx);
185 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_read_private_id_modulus) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
186 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_write_private_id_modulus) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
187 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_generate_private_id_start) (d0_blind_id_t *ctx);
188 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_generate_private_id_request) (d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
189 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_answer_private_id_request) (const d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen, char *outbuf, size_t *outbuflen);
190 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_finish_private_id_request) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
191 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_read_private_id_request_camouflage) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
192 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_write_private_id_request_camouflage) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
193 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_read_private_id) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
194 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_read_public_id) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);
195 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_write_private_id) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
196 //static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_write_public_id) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
197 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_authenticate_with_private_id_start) (d0_blind_id_t *ctx, D0_BOOL is_first, D0_BOOL send_modulus, const char *message, size_t msglen, char *outbuf, size_t *outbuflen);
198 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_authenticate_with_private_id_challenge) (d0_blind_id_t *ctx, D0_BOOL is_first, D0_BOOL recv_modulus, const char *inbuf, size_t inbuflen, char *outbuf, size_t *outbuflen, D0_BOOL *status);
199 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_authenticate_with_private_id_response) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen, char *outbuf, size_t *outbuflen);
200 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_authenticate_with_private_id_verify) (d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen, char *msg, size_t *msglen, D0_BOOL *status);
201 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_fingerprint64_public_id) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen);
202 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_sessionkey_public_id) (const d0_blind_id_t *ctx, char *outbuf, size_t *outbuflen); // can only be done after successful key exchange, this performs a modpow; key length is limited by SHA_DIGESTSIZE for now; also ONLY valid after successful d0_blind_id_authenticate_with_private_id_verify/d0_blind_id_fingerprint64_public_id
203 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_INITIALIZE) (void);
204 static D0_EXPORT void (*qd0_blind_id_SHUTDOWN) (void);
205 static D0_EXPORT void (*qd0_blind_id_util_sha256) (char *out, const char *in, size_t n);
206 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_sign_with_private_id_sign) (d0_blind_id_t *ctx, D0_BOOL is_first, D0_BOOL send_modulus, const char *message, size_t msglen, char *outbuf, size_t *outbuflen);
207 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_sign_with_private_id_sign_detached) (d0_blind_id_t *ctx, D0_BOOL is_first, D0_BOOL send_modulus, const char *message, size_t msglen, char *outbuf, size_t *outbuflen);
208 static D0_EXPORT void (*qd0_blind_id_setmallocfuncs)(d0_malloc_t *m, d0_free_t *f);
209 static D0_EXPORT void (*qd0_blind_id_setmutexfuncs)(d0_createmutex_t *c, d0_destroymutex_t *d, d0_lockmutex_t *l, d0_unlockmutex_t *u);
210 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_verify_public_id)(const d0_blind_id_t *ctx, D0_BOOL *status);
211 static D0_EXPORT D0_WARN_UNUSED_RESULT D0_BOOL (*qd0_blind_id_verify_private_id)(const d0_blind_id_t *ctx);
212 static dllfunction_t d0_blind_id_funcs[] =
214 {"d0_blind_id_new", (void **) &qd0_blind_id_new},
215 {"d0_blind_id_free", (void **) &qd0_blind_id_free},
216 //{"d0_blind_id_clear", (void **) &qd0_blind_id_clear},
217 {"d0_blind_id_copy", (void **) &qd0_blind_id_copy},
218 //{"d0_blind_id_generate_private_key", (void **) &qd0_blind_id_generate_private_key},
219 //{"d0_blind_id_generate_private_key_fastreject", (void **) &qd0_blind_id_generate_private_key_fastreject},
220 //{"d0_blind_id_read_private_key", (void **) &qd0_blind_id_read_private_key},
221 {"d0_blind_id_read_public_key", (void **) &qd0_blind_id_read_public_key},
222 //{"d0_blind_id_write_private_key", (void **) &qd0_blind_id_write_private_key},
223 //{"d0_blind_id_write_public_key", (void **) &qd0_blind_id_write_public_key},
224 {"d0_blind_id_fingerprint64_public_key", (void **) &qd0_blind_id_fingerprint64_public_key},
225 //{"d0_blind_id_generate_private_id_modulus", (void **) &qd0_blind_id_generate_private_id_modulus},
226 {"d0_blind_id_read_private_id_modulus", (void **) &qd0_blind_id_read_private_id_modulus},
227 //{"d0_blind_id_write_private_id_modulus", (void **) &qd0_blind_id_write_private_id_modulus},
228 {"d0_blind_id_generate_private_id_start", (void **) &qd0_blind_id_generate_private_id_start},
229 {"d0_blind_id_generate_private_id_request", (void **) &qd0_blind_id_generate_private_id_request},
230 //{"d0_blind_id_answer_private_id_request", (void **) &qd0_blind_id_answer_private_id_request},
231 {"d0_blind_id_finish_private_id_request", (void **) &qd0_blind_id_finish_private_id_request},
232 //{"d0_blind_id_read_private_id_request_camouflage", (void **) &qd0_blind_id_read_private_id_request_camouflage},
233 //{"d0_blind_id_write_private_id_request_camouflage", (void **) &qd0_blind_id_write_private_id_request_camouflage},
234 {"d0_blind_id_read_private_id", (void **) &qd0_blind_id_read_private_id},
235 //{"d0_blind_id_read_public_id", (void **) &qd0_blind_id_read_public_id},
236 {"d0_blind_id_write_private_id", (void **) &qd0_blind_id_write_private_id},
237 //{"d0_blind_id_write_public_id", (void **) &qd0_blind_id_write_public_id},
238 {"d0_blind_id_authenticate_with_private_id_start", (void **) &qd0_blind_id_authenticate_with_private_id_start},
239 {"d0_blind_id_authenticate_with_private_id_challenge", (void **) &qd0_blind_id_authenticate_with_private_id_challenge},
240 {"d0_blind_id_authenticate_with_private_id_response", (void **) &qd0_blind_id_authenticate_with_private_id_response},
241 {"d0_blind_id_authenticate_with_private_id_verify", (void **) &qd0_blind_id_authenticate_with_private_id_verify},
242 {"d0_blind_id_fingerprint64_public_id", (void **) &qd0_blind_id_fingerprint64_public_id},
243 {"d0_blind_id_sessionkey_public_id", (void **) &qd0_blind_id_sessionkey_public_id},
244 {"d0_blind_id_INITIALIZE", (void **) &qd0_blind_id_INITIALIZE},
245 {"d0_blind_id_SHUTDOWN", (void **) &qd0_blind_id_SHUTDOWN},
246 {"d0_blind_id_util_sha256", (void **) &qd0_blind_id_util_sha256},
247 {"d0_blind_id_sign_with_private_id_sign", (void **) &qd0_blind_id_sign_with_private_id_sign},
248 {"d0_blind_id_sign_with_private_id_sign_detached", (void **) &qd0_blind_id_sign_with_private_id_sign_detached},
249 {"d0_blind_id_setmallocfuncs", (void **) &qd0_blind_id_setmallocfuncs},
250 {"d0_blind_id_setmutexfuncs", (void **) &qd0_blind_id_setmutexfuncs},
251 {"d0_blind_id_verify_public_id", (void **) &qd0_blind_id_verify_public_id},
252 {"d0_blind_id_verify_private_id", (void **) &qd0_blind_id_verify_private_id},
255 // end of d0_blind_id interface
257 static dllhandle_t d0_blind_id_dll = NULL;
258 static qboolean Crypto_OpenLibrary (void)
260 const char* dllnames [] =
263 "libd0_blind_id-0.dll",
264 #elif defined(MACOSX)
265 "libd0_blind_id.0.dylib",
267 "libd0_blind_id.so.0",
268 "libd0_blind_id.so", // FreeBSD
278 return Sys_LoadLibrary (dllnames, &d0_blind_id_dll, d0_blind_id_funcs);
281 static void Crypto_CloseLibrary (void)
283 Sys_UnloadLibrary (&d0_blind_id_dll);
288 #ifdef CRYPTO_RIJNDAEL_STATIC
290 #include <d0_blind_id/d0_rijndael.h>
292 #define d0_rijndael_dll 1
293 #define Crypto_Rijndael_OpenLibrary() true
294 #define Crypto_Rijndael_CloseLibrary()
296 #define qd0_rijndael_setup_encrypt d0_rijndael_setup_encrypt
297 #define qd0_rijndael_setup_decrypt d0_rijndael_setup_decrypt
298 #define qd0_rijndael_encrypt d0_rijndael_encrypt
299 #define qd0_rijndael_decrypt d0_rijndael_decrypt
303 // no need to do the #define dance here, as the upper part declares out macros either way
305 D0_EXPORT int (*qd0_rijndael_setup_encrypt) (unsigned long *rk, const unsigned char *key,
307 D0_EXPORT int (*qd0_rijndael_setup_decrypt) (unsigned long *rk, const unsigned char *key,
309 D0_EXPORT void (*qd0_rijndael_encrypt) (const unsigned long *rk, int nrounds,
310 const unsigned char plaintext[16], unsigned char ciphertext[16]);
311 D0_EXPORT void (*qd0_rijndael_decrypt) (const unsigned long *rk, int nrounds,
312 const unsigned char ciphertext[16], unsigned char plaintext[16]);
313 #define D0_RIJNDAEL_KEYLENGTH(keybits) ((keybits)/8)
314 #define D0_RIJNDAEL_RKLENGTH(keybits) ((keybits)/8+28)
315 #define D0_RIJNDAEL_NROUNDS(keybits) ((keybits)/32+6)
316 static dllfunction_t d0_rijndael_funcs[] =
318 {"d0_rijndael_setup_decrypt", (void **) &qd0_rijndael_setup_decrypt},
319 {"d0_rijndael_setup_encrypt", (void **) &qd0_rijndael_setup_encrypt},
320 {"d0_rijndael_decrypt", (void **) &qd0_rijndael_decrypt},
321 {"d0_rijndael_encrypt", (void **) &qd0_rijndael_encrypt},
324 // end of d0_blind_id interface
326 static dllhandle_t d0_rijndael_dll = NULL;
327 static qboolean Crypto_Rijndael_OpenLibrary (void)
329 const char* dllnames [] =
332 "libd0_rijndael-0.dll",
333 #elif defined(MACOSX)
334 "libd0_rijndael.0.dylib",
336 "libd0_rijndael.so.0",
337 "libd0_rijndael.so", // FreeBSD
347 return Sys_LoadLibrary (dllnames, &d0_rijndael_dll, d0_rijndael_funcs);
350 static void Crypto_Rijndael_CloseLibrary (void)
352 Sys_UnloadLibrary (&d0_rijndael_dll);
358 void sha256(unsigned char *out, const unsigned char *in, int n)
360 qd0_blind_id_util_sha256((char *) out, (const char *) in, n);
363 static size_t Crypto_LoadFile(const char *path, char *buf, size_t nmax, qboolean inuserdir)
369 f = FS_SysOpen(va(vabuf, sizeof(vabuf), "%s%s", *fs_userdir ? fs_userdir : fs_basedir, path), "rb", false);
371 f = FS_SysOpen(va(vabuf, sizeof(vabuf), "%s%s", fs_basedir, path), "rb", false);
374 n = FS_Read(f, buf, nmax);
381 static qboolean PutWithNul(char **data, size_t *len, const char *str)
383 // invariant: data points to insertion point
384 size_t l = strlen(str);
387 memcpy(*data, str, l+1);
393 static const char *GetUntilNul(const char **data, size_t *len)
395 // invariant: data points to next character to take
396 const char *data_save = *data;
409 p = (const char *) memchr(*data, 0, *len);
410 if(!p) // no terminating NUL
423 return (const char *) data_save;
430 static d0_blind_id_t *Crypto_ReadPublicKey(char *buf, size_t len)
432 d0_blind_id_t *pk = NULL;
435 if(Crypto_ParsePack(buf, len, FOURCC_D0PK, p, l, 2))
437 pk = qd0_blind_id_new();
439 if(qd0_blind_id_read_public_key(pk, p[0], l[0]))
440 if(qd0_blind_id_read_private_id_modulus(pk, p[1], l[1]))
444 qd0_blind_id_free(pk);
449 static qboolean Crypto_AddPrivateKey(d0_blind_id_t *pk, char *buf, size_t len)
453 if(Crypto_ParsePack(buf, len, FOURCC_D0SI, p, l, 1))
455 if(qd0_blind_id_read_private_id(pk, p[0], l[0]))
461 #define MAX_PUBKEYS 16
462 static d0_blind_id_t *pubkeys[MAX_PUBKEYS];
463 static char pubkeys_fp64[MAX_PUBKEYS][FP64_SIZE+1];
464 static qboolean pubkeys_havepriv[MAX_PUBKEYS];
465 static qboolean pubkeys_havesig[MAX_PUBKEYS];
466 static char pubkeys_priv_fp64[MAX_PUBKEYS][FP64_SIZE+1];
467 static char challenge_append[1400];
468 static size_t challenge_append_length;
470 static int keygen_i = -1;
471 static char keygen_buf[8192];
473 #define MAX_CRYPTOCONNECTS 16
474 #define CRYPTOCONNECT_NONE 0
475 #define CRYPTOCONNECT_PRECONNECT 1
476 #define CRYPTOCONNECT_CONNECT 2
477 #define CRYPTOCONNECT_RECONNECT 3
478 #define CRYPTOCONNECT_DUPLICATE 4
479 typedef struct server_cryptoconnect_s
482 lhnetaddress_t address;
486 server_cryptoconnect_t;
487 static server_cryptoconnect_t cryptoconnects[MAX_CRYPTOCONNECTS];
489 static int cdata_id = 0;
495 char challenge[2048];
496 char wantserver_idfp[FP64_SIZE+1];
497 qboolean wantserver_aes;
502 // crypto specific helpers
503 #define CDATA ((crypto_data_t *) crypto->data)
504 #define MAKE_CDATA if(!crypto->data) crypto->data = Z_Malloc(sizeof(crypto_data_t))
505 #define CLEAR_CDATA if(crypto->data) { if(CDATA->id) qd0_blind_id_free(CDATA->id); Z_Free(crypto->data); } crypto->data = NULL
507 static crypto_t *Crypto_ServerFindInstance(lhnetaddress_t *peeraddress, qboolean allow_create)
513 return NULL; // no support
515 for(i = 0; i < MAX_CRYPTOCONNECTS; ++i)
516 if(LHNETADDRESS_Compare(peeraddress, &cryptoconnects[i].address))
518 if(i < MAX_CRYPTOCONNECTS && (allow_create || cryptoconnects[i].crypto.data))
520 crypto = &cryptoconnects[i].crypto;
521 cryptoconnects[i].lasttime = realtime;
527 for(i = 1; i < MAX_CRYPTOCONNECTS; ++i)
528 if(cryptoconnects[i].lasttime < cryptoconnects[best].lasttime)
530 crypto = &cryptoconnects[best].crypto;
531 cryptoconnects[best].lasttime = realtime;
532 memcpy(&cryptoconnects[best].address, peeraddress, sizeof(cryptoconnects[best].address));
537 qboolean Crypto_ServerFinishInstance(crypto_t *out, crypto_t *crypto)
539 // no check needed here (returned pointers are only used in prefilled fields)
540 if(!crypto || !crypto->authenticated)
542 Con_Printf("Passed an invalid crypto connect instance\n");
543 memset(out, 0, sizeof(*out));
547 memcpy(out, crypto, sizeof(*out));
548 memset(crypto, 0, sizeof(crypto));
552 crypto_t *Crypto_ServerGetInstance(lhnetaddress_t *peeraddress)
554 // no check needed here (returned pointers are only used in prefilled fields)
555 return Crypto_ServerFindInstance(peeraddress, false);
558 typedef struct crypto_storedhostkey_s
560 struct crypto_storedhostkey_s *next;
563 char idfp[FP64_SIZE+1];
566 crypto_storedhostkey_t;
567 static crypto_storedhostkey_t *crypto_storedhostkey_hashtable[CRYPTO_HOSTKEY_HASHSIZE];
569 static void Crypto_InitHostKeys(void)
572 for(i = 0; i < CRYPTO_HOSTKEY_HASHSIZE; ++i)
573 crypto_storedhostkey_hashtable[i] = NULL;
576 static void Crypto_ClearHostKeys(void)
579 crypto_storedhostkey_t *hk, *hkn;
580 for(i = 0; i < CRYPTO_HOSTKEY_HASHSIZE; ++i)
582 for(hk = crypto_storedhostkey_hashtable[i]; hk; hk = hkn)
587 crypto_storedhostkey_hashtable[i] = NULL;
591 static qboolean Crypto_ClearHostKey(lhnetaddress_t *peeraddress)
595 crypto_storedhostkey_t **hkp;
596 qboolean found = false;
598 LHNETADDRESS_ToString(peeraddress, buf, sizeof(buf), 1);
599 hashindex = CRC_Block((const unsigned char *) buf, strlen(buf)) % CRYPTO_HOSTKEY_HASHSIZE;
600 for(hkp = &crypto_storedhostkey_hashtable[hashindex]; *hkp && LHNETADDRESS_Compare(&((*hkp)->addr), peeraddress); hkp = &((*hkp)->next));
604 crypto_storedhostkey_t *hk = *hkp;
613 static void Crypto_StoreHostKey(lhnetaddress_t *peeraddress, const char *keystring, qboolean complain)
617 crypto_storedhostkey_t *hk;
619 char idfp[FP64_SIZE+1];
625 // syntax of keystring:
626 // aeslevel id@key id@key ...
630 aeslevel = bound(0, *keystring - '0', 3);
631 while(*keystring && *keystring != ' ')
635 while(*keystring && keyid < 0)
638 const char *idstart, *idend, *keystart, *keyend;
639 ++keystring; // skip the space
641 while(*keystring && *keystring != ' ' && *keystring != '@')
647 keystart = keystring;
648 while(*keystring && *keystring != ' ')
652 if(idend - idstart == FP64_SIZE && keyend - keystart == FP64_SIZE)
654 for(keyid = 0; keyid < MAX_PUBKEYS; ++keyid)
656 if(!memcmp(pubkeys_fp64[keyid], keystart, FP64_SIZE))
658 memcpy(idfp, idstart, FP64_SIZE);
662 if(keyid >= MAX_PUBKEYS)
670 LHNETADDRESS_ToString(peeraddress, buf, sizeof(buf), 1);
671 hashindex = CRC_Block((const unsigned char *) buf, strlen(buf)) % CRYPTO_HOSTKEY_HASHSIZE;
672 for(hk = crypto_storedhostkey_hashtable[hashindex]; hk && LHNETADDRESS_Compare(&hk->addr, peeraddress); hk = hk->next);
678 if(hk->keyid != keyid || memcmp(hk->idfp, idfp, FP64_SIZE+1))
679 Con_Printf("Server %s tried to change the host key to a value not in the host cache. Connecting to it will fail. To accept the new host key, do crypto_hostkey_clear %s\n", buf, buf);
680 if(hk->aeslevel > aeslevel)
681 Con_Printf("Server %s tried to reduce encryption status, not accepted. Connecting to it will fail. To accept, do crypto_hostkey_clear %s\n", buf, buf);
683 hk->aeslevel = max(aeslevel, hk->aeslevel);
687 // great, we did NOT have it yet
688 hk = (crypto_storedhostkey_t *) Z_Malloc(sizeof(*hk));
689 memcpy(&hk->addr, peeraddress, sizeof(hk->addr));
691 memcpy(hk->idfp, idfp, FP64_SIZE+1);
692 hk->next = crypto_storedhostkey_hashtable[hashindex];
693 hk->aeslevel = aeslevel;
694 crypto_storedhostkey_hashtable[hashindex] = hk;
697 qboolean Crypto_RetrieveHostKey(lhnetaddress_t *peeraddress, int *keyid, char *keyfp, size_t keyfplen, char *idfp, size_t idfplen, int *aeslevel)
701 crypto_storedhostkey_t *hk;
706 LHNETADDRESS_ToString(peeraddress, buf, sizeof(buf), 1);
707 hashindex = CRC_Block((const unsigned char *) buf, strlen(buf)) % CRYPTO_HOSTKEY_HASHSIZE;
708 for(hk = crypto_storedhostkey_hashtable[hashindex]; hk && LHNETADDRESS_Compare(&hk->addr, peeraddress); hk = hk->next);
716 strlcpy(keyfp, pubkeys_fp64[hk->keyid], keyfplen);
718 strlcpy(idfp, hk->idfp, idfplen);
720 *aeslevel = hk->aeslevel;
724 int Crypto_RetrieveLocalKey(int keyid, char *keyfp, size_t keyfplen, char *idfp, size_t idfplen, qboolean *issigned) // return value: -1 if more to come, +1 if valid, 0 if end of list
726 if(keyid < 0 || keyid >= MAX_PUBKEYS)
735 strlcpy(keyfp, pubkeys_fp64[keyid], keyfplen);
737 if(pubkeys_havepriv[keyid])
738 strlcpy(idfp, pubkeys_priv_fp64[keyid], keyfplen);
740 *issigned = pubkeys_havesig[keyid];
745 // init/shutdown code
746 static void Crypto_BuildChallengeAppend(void)
748 char *p, *lengthptr, *startptr;
751 p = challenge_append;
752 n = sizeof(challenge_append);
753 Crypto_UnLittleLong(p, PROTOCOL_VLEN);
757 Crypto_UnLittleLong(p, 0);
760 Crypto_UnLittleLong(p, PROTOCOL_D0_BLIND_ID);
764 for(i = 0; i < MAX_PUBKEYS; ++i)
765 if(pubkeys_havepriv[i])
766 PutWithNul(&p, &n, pubkeys_fp64[i]);
767 PutWithNul(&p, &n, "");
768 for(i = 0; i < MAX_PUBKEYS; ++i)
769 if(!pubkeys_havepriv[i] && pubkeys[i])
770 PutWithNul(&p, &n, pubkeys_fp64[i]);
771 Crypto_UnLittleLong(lengthptr, p - startptr);
772 challenge_append_length = p - challenge_append;
775 void Crypto_LoadKeys(void)
782 if(!d0_blind_id_dll) // don't if we can't
785 if(crypto_idstring) // already loaded? then not
788 Host_LockSession(); // we use the session ID here
791 // note: we are just a CLIENT
793 // PUBLIC KEYS to accept (including modulus)
794 // PRIVATE KEY of user
796 crypto_idstring = NULL;
797 dpsnprintf(crypto_idstring_buf, sizeof(crypto_idstring_buf), "%d", d0_rijndael_dll ? crypto_aeslevel.integer : 0);
798 for(i = 0; i < MAX_PUBKEYS; ++i)
800 memset(pubkeys_fp64[i], 0, sizeof(pubkeys_fp64[i]));
801 memset(pubkeys_priv_fp64[i], 0, sizeof(pubkeys_fp64[i]));
802 pubkeys_havepriv[i] = false;
803 pubkeys_havesig[i] = false;
804 len = Crypto_LoadFile(va(vabuf, sizeof(vabuf), "key_%d.d0pk", i), buf, sizeof(buf), false);
805 if((pubkeys[i] = Crypto_ReadPublicKey(buf, len)))
808 if(qd0_blind_id_fingerprint64_public_key(pubkeys[i], pubkeys_fp64[i], &len2)) // keeps final NUL
810 Con_Printf("Loaded public key key_%d.d0pk (fingerprint: %s)\n", i, pubkeys_fp64[i]);
811 len = Crypto_LoadFile(va(vabuf, sizeof(vabuf), "key_%d.d0si%s", i, sessionid.string), buf, sizeof(buf), true);
814 if(Crypto_AddPrivateKey(pubkeys[i], buf, len))
817 if(qd0_blind_id_fingerprint64_public_id(pubkeys[i], pubkeys_priv_fp64[i], &len2)) // keeps final NUL
821 Con_Printf("Loaded private ID key_%d.d0si%s for key_%d.d0pk (public key fingerprint: %s)\n", i, sessionid.string, i, pubkeys_priv_fp64[i]);
823 // verify the key we just loaded (just in case)
824 if(qd0_blind_id_verify_private_id(pubkeys[i]) && qd0_blind_id_verify_public_id(pubkeys[i], &status))
826 pubkeys_havepriv[i] = true;
827 strlcat(crypto_idstring_buf, va(vabuf, sizeof(vabuf), " %s@%s", pubkeys_priv_fp64[i], pubkeys_fp64[i]), sizeof(crypto_idstring_buf));
829 // verify the key we just got (just in case)
831 pubkeys_havesig[i] = true;
833 Con_Printf("NOTE: this ID has not yet been signed!\n");
837 Con_Printf("d0_blind_id_verify_private_id failed, this is not a valid key!\n");
838 qd0_blind_id_free(pubkeys[i]);
844 Con_Printf("d0_blind_id_fingerprint64_public_id failed\n");
845 qd0_blind_id_free(pubkeys[i]);
853 // can't really happen
854 qd0_blind_id_free(pubkeys[i]);
859 crypto_idstring = crypto_idstring_buf;
862 Crypto_BuildChallengeAppend();
864 // find a good prefix length for all the keys we know (yes, algorithm is not perfect yet, may yield too long prefix length)
865 crypto_keyfp_recommended_length = 0;
866 memset(buf+256, 0, MAX_PUBKEYS + MAX_PUBKEYS);
867 while(crypto_keyfp_recommended_length < FP64_SIZE)
870 for(i = 0; i < MAX_PUBKEYS; ++i)
874 ++buf[(unsigned char) pubkeys_fp64[i][crypto_keyfp_recommended_length]];
875 if(pubkeys_havepriv[i])
876 if(!buf[256 + MAX_PUBKEYS + i])
877 ++buf[(unsigned char) pubkeys_priv_fp64[i][crypto_keyfp_recommended_length]];
879 for(i = 0; i < MAX_PUBKEYS; ++i)
883 if(buf[(unsigned char) pubkeys_fp64[i][crypto_keyfp_recommended_length]] < 2)
885 if(pubkeys_havepriv[i])
886 if(!buf[256 + MAX_PUBKEYS + i])
887 if(buf[(unsigned char) pubkeys_priv_fp64[i][crypto_keyfp_recommended_length]] < 2)
888 buf[256 + MAX_PUBKEYS + i] = 1;
890 ++crypto_keyfp_recommended_length;
891 for(i = 0; i < MAX_PUBKEYS; ++i)
896 if(pubkeys_havepriv[i])
897 if(!buf[256 + MAX_PUBKEYS + i])
903 if(crypto_keyfp_recommended_length < 7)
904 crypto_keyfp_recommended_length = 7;
907 static void Crypto_UnloadKeys(void)
912 for(i = 0; i < MAX_PUBKEYS; ++i)
915 qd0_blind_id_free(pubkeys[i]);
917 pubkeys_havepriv[i] = false;
918 pubkeys_havesig[i] = false;
919 memset(pubkeys_fp64[i], 0, sizeof(pubkeys_fp64[i]));
920 memset(pubkeys_priv_fp64[i], 0, sizeof(pubkeys_fp64[i]));
921 challenge_append_length = 0;
923 crypto_idstring = NULL;
926 static mempool_t *cryptomempool;
932 static void *Crypto_d0_malloc(size_t len)
934 return Mem_Alloc(cryptomempool, len);
937 static void Crypto_d0_free(void *p)
942 static void *Crypto_d0_createmutex(void)
944 return Thread_CreateMutex();
947 static void Crypto_d0_destroymutex(void *m)
949 Thread_DestroyMutex(m);
952 static int Crypto_d0_lockmutex(void *m)
954 return Thread_LockMutex(m);
957 static int Crypto_d0_unlockmutex(void *m)
959 return Thread_UnlockMutex(m);
965 void Crypto_Shutdown(void)
970 Crypto_Rijndael_CloseLibrary();
975 for(i = 0; i < MAX_CRYPTOCONNECTS; ++i)
977 crypto = &cryptoconnects[i].crypto;
980 memset(cryptoconnects, 0, sizeof(cryptoconnects));
981 crypto = &cls.crypto;
986 qd0_blind_id_SHUTDOWN();
988 Crypto_CloseLibrary();
991 Mem_FreePool(&cryptomempool);
994 void Crypto_Init(void)
996 cryptomempool = Mem_AllocPool("crypto", 0, NULL);
998 if(!Crypto_OpenLibrary())
1001 qd0_blind_id_setmallocfuncs(Crypto_d0_malloc, Crypto_d0_free);
1002 if (Thread_HasThreads())
1003 qd0_blind_id_setmutexfuncs(Crypto_d0_createmutex, Crypto_d0_destroymutex, Crypto_d0_lockmutex, Crypto_d0_unlockmutex);
1005 if(!qd0_blind_id_INITIALIZE())
1007 Crypto_Rijndael_CloseLibrary();
1008 Crypto_CloseLibrary();
1009 Con_Printf("libd0_blind_id initialization FAILED, cryptography support has been disabled\n");
1013 Crypto_Rijndael_OpenLibrary(); // if this fails, it's uncritical
1015 Crypto_InitHostKeys();
1019 qboolean Crypto_Available(void)
1021 if(!d0_blind_id_dll)
1027 static void Crypto_KeyGen_Finished(int code, size_t length_received, unsigned char *buffer, void *cbdata)
1031 static char buf[8192];
1032 static char buf2[8192];
1038 SV_LockThreadMutex();
1040 if(!d0_blind_id_dll)
1042 Con_Print("libd0_blind_id DLL not found, this command is inactive.\n");
1044 SV_UnlockThreadMutex();
1048 if(keygen_i >= MAX_PUBKEYS || !pubkeys[keygen_i])
1050 Con_Printf("overflow of keygen_i\n");
1052 SV_UnlockThreadMutex();
1057 Con_Printf("Unexpected response from keygen server:\n");
1058 Com_HexDumpToConsole(buffer, length_received);
1059 SV_UnlockThreadMutex();
1062 if(!Crypto_ParsePack((const char *) buffer, length_received, FOURCC_D0IR, p, l, 1))
1064 if(length_received >= 5 && Crypto_LittleLong((const char *) buffer) == FOURCC_D0ER)
1066 Con_Printf("Error response from keygen server: %.*s\n", (int)(length_received - 5), buffer + 5);
1070 Con_Printf("Invalid response from keygen server:\n");
1071 Com_HexDumpToConsole(buffer, length_received);
1074 SV_UnlockThreadMutex();
1077 if(!qd0_blind_id_finish_private_id_request(pubkeys[keygen_i], p[0], l[0]))
1079 Con_Printf("d0_blind_id_finish_private_id_request failed\n");
1081 SV_UnlockThreadMutex();
1085 // verify the key we just got (just in case)
1086 if(!qd0_blind_id_verify_public_id(pubkeys[keygen_i], &status) || !status)
1088 Con_Printf("d0_blind_id_verify_public_id failed\n");
1090 SV_UnlockThreadMutex();
1094 // we have a valid key now!
1095 // make the rest of crypto.c know that
1096 Con_Printf("Received signature for private ID key_%d.d0pk (public key fingerprint: %s)\n", keygen_i, pubkeys_priv_fp64[keygen_i]);
1097 pubkeys_havesig[keygen_i] = true;
1099 // write the key to disk
1102 if(!qd0_blind_id_write_private_id(pubkeys[keygen_i], buf, &l[0]))
1104 Con_Printf("d0_blind_id_write_private_id failed\n");
1106 SV_UnlockThreadMutex();
1109 if(!(buf2size = Crypto_UnParsePack(buf2, sizeof(buf2), FOURCC_D0SI, p, l, 1)))
1111 Con_Printf("Crypto_UnParsePack failed\n");
1113 SV_UnlockThreadMutex();
1117 FS_CreatePath(va(vabuf, sizeof(vabuf), "%skey_%d.d0si%s", *fs_userdir ? fs_userdir : fs_basedir, keygen_i, sessionid.string));
1118 f = FS_SysOpen(va(vabuf, sizeof(vabuf), "%skey_%d.d0si%s", *fs_userdir ? fs_userdir : fs_basedir, keygen_i, sessionid.string), "wb", false);
1121 Con_Printf("Cannot open key_%d.d0si%s\n", keygen_i, sessionid.string);
1123 SV_UnlockThreadMutex();
1126 FS_Write(f, buf2, buf2size);
1129 Con_Printf("Saved to key_%d.d0si%s\n", keygen_i, sessionid.string);
1131 SV_UnlockThreadMutex();
1134 static void Crypto_KeyGen_f(void)
1139 static char buf[8192];
1140 static char buf2[8192];
1142 size_t buf2l, buf2pos;
1147 if(!d0_blind_id_dll)
1149 Con_Print("libd0_blind_id DLL not found, this command is inactive.\n");
1154 Con_Printf("usage:\n%s id url\n", Cmd_Argv(0));
1157 SV_LockThreadMutex();
1159 i = atoi(Cmd_Argv(1));
1162 Con_Printf("there is no public key %d\n", i);
1163 SV_UnlockThreadMutex();
1168 Con_Printf("there is already a keygen run on the way\n");
1169 SV_UnlockThreadMutex();
1174 // how to START the keygenning...
1175 if(pubkeys_havepriv[keygen_i])
1177 if(pubkeys_havesig[keygen_i])
1179 Con_Printf("there is already a signed private key for %d\n", i);
1181 SV_UnlockThreadMutex();
1184 // if we get here, we only need a signature, no new keygen run needed
1185 Con_Printf("Only need a signature for an existing key...\n");
1189 // we also need a new ID itself
1190 if(!qd0_blind_id_generate_private_id_start(pubkeys[keygen_i]))
1192 Con_Printf("d0_blind_id_start failed\n");
1194 SV_UnlockThreadMutex();
1197 // verify the key we just got (just in case)
1198 if(!qd0_blind_id_verify_private_id(pubkeys[keygen_i]))
1200 Con_Printf("d0_blind_id_verify_private_id failed\n");
1202 SV_UnlockThreadMutex();
1205 // we have a valid key now!
1206 // make the rest of crypto.c know that
1208 if(qd0_blind_id_fingerprint64_public_id(pubkeys[keygen_i], pubkeys_priv_fp64[keygen_i], &len2)) // keeps final NUL
1210 Con_Printf("Generated private ID key_%d.d0pk (public key fingerprint: %s)\n", keygen_i, pubkeys_priv_fp64[keygen_i]);
1211 pubkeys_havepriv[keygen_i] = true;
1212 strlcat(crypto_idstring_buf, va(vabuf, sizeof(vabuf), " %s@%s", pubkeys_priv_fp64[keygen_i], pubkeys_fp64[keygen_i]), sizeof(crypto_idstring_buf));
1213 crypto_idstring = crypto_idstring_buf;
1214 Crypto_BuildChallengeAppend();
1216 // write the key to disk
1219 if(!qd0_blind_id_write_private_id(pubkeys[keygen_i], buf, &l[0]))
1221 Con_Printf("d0_blind_id_write_private_id failed\n");
1223 SV_UnlockThreadMutex();
1226 if(!(buf2size = Crypto_UnParsePack(buf2, sizeof(buf2), FOURCC_D0SI, p, l, 1)))
1228 Con_Printf("Crypto_UnParsePack failed\n");
1230 SV_UnlockThreadMutex();
1234 FS_CreatePath(va(vabuf, sizeof(vabuf), "%skey_%d.d0si%s", *fs_userdir ? fs_userdir : fs_basedir, keygen_i, sessionid.string));
1235 f = FS_SysOpen(va(vabuf, sizeof(vabuf), "%skey_%d.d0si%s", *fs_userdir ? fs_userdir : fs_basedir, keygen_i, sessionid.string), "wb", false);
1238 Con_Printf("Cannot open key_%d.d0si%s\n", keygen_i, sessionid.string);
1240 SV_UnlockThreadMutex();
1243 FS_Write(f, buf2, buf2size);
1246 Con_Printf("Saved unsigned key to key_%d.d0si%s\n", keygen_i, sessionid.string);
1250 if(!qd0_blind_id_generate_private_id_request(pubkeys[keygen_i], buf, &l[0]))
1252 Con_Printf("d0_blind_id_generate_private_id_request failed\n");
1254 SV_UnlockThreadMutex();
1257 buf2pos = strlen(Cmd_Argv(2));
1258 memcpy(buf2, Cmd_Argv(2), buf2pos);
1259 if(!(buf2l = Crypto_UnParsePack(buf2 + buf2pos, sizeof(buf2) - buf2pos - 1, FOURCC_D0IQ, p, l, 1)))
1261 Con_Printf("Crypto_UnParsePack failed\n");
1263 SV_UnlockThreadMutex();
1266 if(!(buf2l = base64_encode((unsigned char *) (buf2 + buf2pos), buf2l, sizeof(buf2) - buf2pos - 1)))
1268 Con_Printf("base64_encode failed\n");
1270 SV_UnlockThreadMutex();
1275 if(!Curl_Begin_ToMemory(buf2, 0, (unsigned char *) keygen_buf, sizeof(keygen_buf), Crypto_KeyGen_Finished, NULL))
1277 Con_Printf("curl failed\n");
1279 SV_UnlockThreadMutex();
1282 Con_Printf("Signature generation in progress...\n");
1283 SV_UnlockThreadMutex();
1288 static void Crypto_Reload_f(void)
1290 Crypto_ClearHostKeys();
1291 Crypto_UnloadKeys();
1295 static void Crypto_Keys_f(void)
1298 if(!d0_blind_id_dll)
1300 Con_Print("libd0_blind_id DLL not found, this command is inactive.\n");
1303 for(i = 0; i < MAX_PUBKEYS; ++i)
1307 Con_Printf("%2d: public key key_%d.d0pk (fingerprint: %s)\n", i, i, pubkeys_fp64[i]);
1308 if(pubkeys_havepriv[i])
1310 Con_Printf(" private ID key_%d.d0si%s (public key fingerprint: %s)\n", i, sessionid.string, pubkeys_priv_fp64[i]);
1311 if(!pubkeys_havesig[i])
1312 Con_Printf(" NOTE: this ID has not yet been signed!\n");
1318 static void Crypto_HostKeys_f(void)
1321 crypto_storedhostkey_t *hk;
1324 if(!d0_blind_id_dll)
1326 Con_Print("libd0_blind_id DLL not found, this command is inactive.\n");
1329 for(i = 0; i < CRYPTO_HOSTKEY_HASHSIZE; ++i)
1331 for(hk = crypto_storedhostkey_hashtable[i]; hk; hk = hk->next)
1333 LHNETADDRESS_ToString(&hk->addr, buf, sizeof(buf), 1);
1334 Con_Printf("%d %s@%.*s %s\n",
1337 crypto_keyfp_recommended_length, pubkeys_fp64[hk->keyid],
1343 static void Crypto_HostKey_Clear_f(void)
1345 lhnetaddress_t addr;
1348 if(!d0_blind_id_dll)
1350 Con_Print("libd0_blind_id DLL not found, this command is inactive.\n");
1354 for(i = 1; i < Cmd_Argc(); ++i)
1356 LHNETADDRESS_FromString(&addr, Cmd_Argv(i), 26000);
1357 if(Crypto_ClearHostKey(&addr))
1359 Con_Printf("cleared host key for %s\n", Cmd_Argv(i));
1364 void Crypto_Init_Commands(void)
1368 Cmd_AddCommand("crypto_reload", Crypto_Reload_f, "reloads cryptographic keys");
1369 Cmd_AddCommand("crypto_keygen", Crypto_KeyGen_f, "generates and saves a cryptographic key");
1370 Cmd_AddCommand("crypto_keys", Crypto_Keys_f, "lists the loaded keys");
1371 Cmd_AddCommand("crypto_hostkeys", Crypto_HostKeys_f, "lists the cached host keys");
1372 Cmd_AddCommand("crypto_hostkey_clear", Crypto_HostKey_Clear_f, "clears a cached host key");
1373 Cvar_RegisterVariable(&crypto_developer);
1375 Cvar_RegisterVariable(&crypto_aeslevel);
1377 crypto_aeslevel.integer = 0; // make sure
1378 Cvar_RegisterVariable(&crypto_servercpupercent);
1379 Cvar_RegisterVariable(&crypto_servercpumaxtime);
1380 Cvar_RegisterVariable(&crypto_servercpudebug);
1386 static void aescpy(unsigned char *key, const unsigned char *iv, unsigned char *dst, const unsigned char *src, size_t len)
1388 const unsigned char *xorpos = iv;
1389 unsigned char xorbuf[16];
1390 unsigned long rk[D0_RIJNDAEL_RKLENGTH(DHKEY_SIZE * 8)];
1392 qd0_rijndael_setup_encrypt(rk, key, DHKEY_SIZE * 8);
1395 for(i = 0; i < 16; ++i)
1396 xorbuf[i] = src[i] ^ xorpos[i];
1397 qd0_rijndael_encrypt(rk, D0_RIJNDAEL_NROUNDS(DHKEY_SIZE * 8), xorbuf, dst);
1405 for(i = 0; i < len; ++i)
1406 xorbuf[i] = src[i] ^ xorpos[i];
1408 xorbuf[i] = xorpos[i];
1409 qd0_rijndael_encrypt(rk, D0_RIJNDAEL_NROUNDS(DHKEY_SIZE * 8), xorbuf, dst);
1412 static void seacpy(unsigned char *key, const unsigned char *iv, unsigned char *dst, const unsigned char *src, size_t len)
1414 const unsigned char *xorpos = iv;
1415 unsigned char xorbuf[16];
1416 unsigned long rk[D0_RIJNDAEL_RKLENGTH(DHKEY_SIZE * 8)];
1418 qd0_rijndael_setup_decrypt(rk, key, DHKEY_SIZE * 8);
1421 qd0_rijndael_decrypt(rk, D0_RIJNDAEL_NROUNDS(DHKEY_SIZE * 8), src, xorbuf);
1422 for(i = 0; i < 16; ++i)
1423 dst[i] = xorbuf[i] ^ xorpos[i];
1431 qd0_rijndael_decrypt(rk, D0_RIJNDAEL_NROUNDS(DHKEY_SIZE * 8), src, xorbuf);
1432 for(i = 0; i < len; ++i)
1433 dst[i] = xorbuf[i] ^ xorpos[i];
1437 // NOTE: we MUST avoid the following begins of the packet:
1438 // 1. 0xFF, 0xFF, 0xFF, 0xFF
1439 // 2. 0x80, 0x00, length/256, length%256
1440 // this luckily does NOT affect AES mode, where the first byte always is in the range from 0x00 to 0x0F
1441 const void *Crypto_EncryptPacket(crypto_t *crypto, const void *data_src, size_t len_src, void *data_dst, size_t *len_dst, size_t len)
1443 unsigned char h[32];
1445 if(crypto->authenticated)
1449 // AES packet = 1 byte length overhead, 15 bytes from HMAC-SHA-256, data, 0..15 bytes padding
1450 // 15 bytes HMAC-SHA-256 (112bit) suffice as the attacker can't do more than forge a random-looking packet
1451 // HMAC is needed to not leak information about packet content
1452 if(developer_networking.integer)
1454 Con_Print("To be encrypted:\n");
1455 Com_HexDumpToConsole((const unsigned char *) data_src, len_src);
1457 if(len_src + 32 > len || !HMAC_SHA256_32BYTES(h, (const unsigned char *) data_src, len_src, crypto->dhkey, DHKEY_SIZE))
1459 Con_Printf("Crypto_EncryptPacket failed (not enough space: %d bytes in, %d bytes out)\n", (int) len_src, (int) len);
1462 *len_dst = ((len_src + 15) / 16) * 16 + 16; // add 16 for HMAC, then round to 16-size for AES
1463 ((unsigned char *) data_dst)[0] = *len_dst - len_src;
1464 memcpy(((unsigned char *) data_dst)+1, h, 15);
1465 aescpy(crypto->dhkey, (const unsigned char *) data_dst, ((unsigned char *) data_dst) + 16, (const unsigned char *) data_src, len_src);
1470 // HMAC packet = 16 bytes HMAC-SHA-256 (truncated to 128 bits), data
1471 if(len_src + 16 > len || !HMAC_SHA256_32BYTES(h, (const unsigned char *) data_src, len_src, crypto->dhkey, DHKEY_SIZE))
1473 Con_Printf("Crypto_EncryptPacket failed (not enough space: %d bytes in, %d bytes out)\n", (int) len_src, (int) len);
1476 *len_dst = len_src + 16;
1477 memcpy(data_dst, h, 16);
1478 memcpy(((unsigned char *) data_dst) + 16, (unsigned char *) data_src, len_src);
1480 // handle the "avoid" conditions:
1481 i = BuffBigLong((unsigned char *) data_dst);
1483 (i == (int)0xFFFFFFFF) // avoid QW control packet
1485 (i == (int)0x80000000 + (int)*len_dst) // avoid NQ control packet
1487 *(unsigned char *)data_dst ^= 0x80; // this will ALWAYS fix it
1498 const void *Crypto_DecryptPacket(crypto_t *crypto, const void *data_src, size_t len_src, void *data_dst, size_t *len_dst, size_t len)
1500 unsigned char h[32];
1503 // silently handle non-crypto packets
1504 i = BuffBigLong((unsigned char *) data_src);
1506 (i == (int)0xFFFFFFFF) // avoid QW control packet
1508 (i == (int)0x80000000 + (int)len_src) // avoid NQ control packet
1512 if(crypto->authenticated)
1516 if(len_src < 16 || ((len_src - 16) % 16))
1518 Con_Printf("Crypto_DecryptPacket failed (not enough space: %d bytes in, %d bytes out)\n", (int) len_src, (int) len);
1521 *len_dst = len_src - ((unsigned char *) data_src)[0];
1522 if(len < *len_dst || *len_dst > len_src - 16)
1524 Con_Printf("Crypto_DecryptPacket failed (not enough space: %d bytes in, %d->%d bytes out)\n", (int) len_src, (int) *len_dst, (int) len);
1527 seacpy(crypto->dhkey, (unsigned char *) data_src, (unsigned char *) data_dst, ((const unsigned char *) data_src) + 16, *len_dst);
1529 if(!HMAC_SHA256_32BYTES(h, (const unsigned char *) data_dst, *len_dst, crypto->dhkey, DHKEY_SIZE))
1531 Con_Printf("HMAC fail\n");
1534 if(memcmp(((const unsigned char *) data_src)+1, h, 15)) // ignore first byte, used for length
1536 Con_Printf("HMAC mismatch\n");
1539 if(developer_networking.integer)
1541 Con_Print("Decrypted:\n");
1542 Com_HexDumpToConsole((const unsigned char *) data_dst, *len_dst);
1544 return data_dst; // no need to copy
1550 Con_Printf("Crypto_DecryptPacket failed (not enough space: %d bytes in, %d bytes out)\n", (int) len_src, (int) len);
1553 *len_dst = len_src - 16;
1556 Con_Printf("Crypto_DecryptPacket failed (not enough space: %d bytes in, %d->%d bytes out)\n", (int) len_src, (int) *len_dst, (int) len);
1559 //memcpy(data_dst, data_src + 16, *len_dst);
1560 if(!HMAC_SHA256_32BYTES(h, ((const unsigned char *) data_src) + 16, *len_dst, crypto->dhkey, DHKEY_SIZE))
1562 Con_Printf("HMAC fail\n");
1563 Com_HexDumpToConsole((const unsigned char *) data_src, len_src);
1567 if(memcmp((const unsigned char *) data_src, h, 16)) // ignore first byte, used for length
1569 // undo the "avoid conditions"
1571 (i == (int)0x7FFFFFFF) // avoided QW control packet
1573 (i == (int)0x00000000 + (int)len_src) // avoided NQ control packet
1576 // do the avoidance on the hash too
1578 if(memcmp((const unsigned char *) data_src, h, 16)) // ignore first byte, used for length
1580 Con_Printf("HMAC mismatch\n");
1581 Com_HexDumpToConsole((const unsigned char *) data_src, len_src);
1587 Con_Printf("HMAC mismatch\n");
1588 Com_HexDumpToConsole((const unsigned char *) data_src, len_src);
1592 return ((const unsigned char *) data_src) + 16; // no need to copy, so data_dst is not used
1603 const char *Crypto_GetInfoResponseDataString(void)
1605 crypto_idstring_buf[0] = '0' + crypto_aeslevel.integer;
1606 return crypto_idstring;
1610 qboolean Crypto_ServerAppendToChallenge(const char *data_in, size_t len_in, char *data_out, size_t *len_out, size_t maxlen_out)
1612 // cheap op, all is precomputed
1613 if(!d0_blind_id_dll)
1614 return false; // no support
1616 if(maxlen_out <= *len_out + challenge_append_length)
1618 memcpy(data_out + *len_out, challenge_append, challenge_append_length);
1619 *len_out += challenge_append_length;
1623 static int Crypto_ServerError(char *data_out, size_t *len_out, const char *msg, const char *msg_client)
1627 Con_DPrintf("rejecting client: %s\n", msg);
1629 dpsnprintf(data_out, *len_out, "reject %s", msg_client);
1630 *len_out = strlen(data_out);
1631 return CRYPTO_DISCARD;
1634 static int Crypto_SoftServerError(char *data_out, size_t *len_out, const char *msg)
1637 Con_DPrintf("%s\n", msg);
1638 return CRYPTO_DISCARD;
1641 static int Crypto_ServerParsePacket_Internal(const char *data_in, size_t len_in, char *data_out, size_t *len_out, lhnetaddress_t *peeraddress)
1643 // if "connect": reject if in the middle of crypto handshake
1644 crypto_t *crypto = NULL;
1645 char *data_out_p = data_out;
1646 const char *string = data_in;
1650 char infostringvalue[MAX_INPUTLINE];
1653 if(!d0_blind_id_dll)
1654 return CRYPTO_NOMATCH; // no support
1656 if (len_in > 8 && !memcmp(string, "connect\\", 8) && d0_rijndael_dll && crypto_aeslevel.integer >= 3)
1660 // sorry, we have to verify the challenge here to not reflect network spam
1662 if (!(s = InfoString_GetValue(string + 4, "challenge", infostringvalue, sizeof(infostringvalue))))
1663 return CRYPTO_NOMATCH; // will be later accepted if encryption was set up
1664 // validate the challenge
1665 for (i = 0;i < MAX_CHALLENGES;i++)
1666 if(challenge[i].time > 0)
1667 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1669 // if the challenge is not recognized, drop the packet
1670 if (i == MAX_CHALLENGES) // challenge mismatch is silent
1671 return CRYPTO_DISCARD; // pre-challenge: rather be silent
1673 crypto = Crypto_ServerFindInstance(peeraddress, false);
1674 if(!crypto || !crypto->authenticated)
1675 return Crypto_ServerError(data_out, len_out, "This server requires authentication and encryption to be supported by your client", NULL);
1677 else if(len_in > 5 && !memcmp(string, "d0pk\\", 5) && ((LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP) || sv_public.integer > -3))
1679 const char *cnt, *s, *p;
1681 int clientid = -1, serverid = -1;
1682 cnt = InfoString_GetValue(string + 4, "id", infostringvalue, sizeof(infostringvalue));
1683 id = (cnt ? atoi(cnt) : -1);
1684 cnt = InfoString_GetValue(string + 4, "cnt", infostringvalue, sizeof(infostringvalue));
1686 return CRYPTO_DISCARD; // pre-challenge: rather be silent
1687 GetUntilNul(&data_in, &len_in);
1689 return CRYPTO_DISCARD; // pre-challenge: rather be silent
1690 if(!strcmp(cnt, "0"))
1693 if (!(s = InfoString_GetValue(string + 4, "challenge", infostringvalue, sizeof(infostringvalue))))
1694 return CRYPTO_DISCARD; // pre-challenge: rather be silent
1695 // validate the challenge
1696 for (i = 0;i < MAX_CHALLENGES;i++)
1697 if(challenge[i].time > 0)
1698 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1700 // if the challenge is not recognized, drop the packet
1701 if (i == MAX_CHALLENGES) // challenge mismatch is silent
1702 return CRYPTO_DISCARD; // pre-challenge: rather be silent
1704 if (!(s = InfoString_GetValue(string + 4, "aeslevel", infostringvalue, sizeof(infostringvalue))))
1705 aeslevel = 0; // not supported
1707 aeslevel = bound(0, atoi(s), 3);
1708 switch(bound(0, d0_rijndael_dll ? crypto_aeslevel.integer : 0, 3))
1710 default: // dummy, never happens, but to make gcc happy...
1713 return Crypto_ServerError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)", NULL);
1717 aes = (aeslevel >= 2);
1720 aes = (aeslevel >= 1);
1724 return Crypto_ServerError(data_out, len_out, "This server requires encryption to be supported (crypto_aeslevel >= 1, and d0_rijndael library must be present)", NULL);
1729 p = GetUntilNul(&data_in, &len_in);
1732 for(i = 0; i < MAX_PUBKEYS; ++i)
1735 if(!strcmp(p, pubkeys_fp64[i]))
1736 if(pubkeys_havepriv[i])
1741 return Crypto_ServerError(data_out, len_out, "Invalid server key", NULL);
1743 p = GetUntilNul(&data_in, &len_in);
1746 for(i = 0; i < MAX_PUBKEYS; ++i)
1749 if(!strcmp(p, pubkeys_fp64[i]))
1754 return Crypto_ServerError(data_out, len_out, "Invalid client key", NULL);
1757 crypto = Crypto_ServerFindInstance(peeraddress, true);
1759 return Crypto_ServerError(data_out, len_out, "Could not create a crypto connect instance", NULL);
1761 CDATA->cdata_id = id;
1762 CDATA->s = serverid;
1763 CDATA->c = clientid;
1764 memset(crypto->dhkey, 0, sizeof(crypto->dhkey));
1765 CDATA->challenge[0] = 0;
1766 crypto->client_keyfp[0] = 0;
1767 crypto->client_idfp[0] = 0;
1768 crypto->server_keyfp[0] = 0;
1769 crypto->server_idfp[0] = 0;
1770 crypto->use_aes = aes != 0;
1774 // I am the server, and my key is ok... so let's set server_keyfp and server_idfp
1775 strlcpy(crypto->server_keyfp, pubkeys_fp64[CDATA->s], sizeof(crypto->server_keyfp));
1776 strlcpy(crypto->server_idfp, pubkeys_priv_fp64[CDATA->s], sizeof(crypto->server_idfp));
1779 CDATA->id = qd0_blind_id_new();
1783 return Crypto_ServerError(data_out, len_out, "d0_blind_id_new failed", "Internal error");
1785 if(!qd0_blind_id_copy(CDATA->id, pubkeys[CDATA->s]))
1788 return Crypto_ServerError(data_out, len_out, "d0_blind_id_copy failed", "Internal error");
1790 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\1\\id\\%d\\aes\\%d", CDATA->cdata_id, crypto->use_aes));
1791 if(!qd0_blind_id_authenticate_with_private_id_start(CDATA->id, true, false, "XONOTIC", 8, data_out_p, len_out)) // len_out receives used size by this op
1794 return Crypto_ServerError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_start failed", "Internal error");
1796 CDATA->next_step = 2;
1797 data_out_p += *len_out;
1798 *len_out = data_out_p - data_out;
1799 return CRYPTO_DISCARD;
1801 else if(CDATA->c >= 0)
1804 CDATA->id = qd0_blind_id_new();
1808 return Crypto_ServerError(data_out, len_out, "d0_blind_id_new failed", "Internal error");
1810 if(!qd0_blind_id_copy(CDATA->id, pubkeys[CDATA->c]))
1813 return Crypto_ServerError(data_out, len_out, "d0_blind_id_copy failed", "Internal error");
1815 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\5\\id\\%d\\aes\\%d", CDATA->cdata_id, crypto->use_aes));
1816 if(!qd0_blind_id_authenticate_with_private_id_challenge(CDATA->id, true, false, data_in, len_in, data_out_p, len_out, &status))
1819 return Crypto_ServerError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_challenge failed", "Internal error");
1821 CDATA->next_step = 6;
1822 data_out_p += *len_out;
1823 *len_out = data_out_p - data_out;
1824 return CRYPTO_DISCARD;
1829 return Crypto_ServerError(data_out, len_out, "Missing client and server key", NULL);
1832 else if(!strcmp(cnt, "2"))
1835 crypto = Crypto_ServerFindInstance(peeraddress, false);
1837 return CRYPTO_NOMATCH; // pre-challenge, rather be silent
1839 if(CDATA->cdata_id != id)
1840 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\id\\%d when expecting %d", id, CDATA->cdata_id));
1841 if(CDATA->next_step != 2)
1842 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\cnt\\%s when expecting %d", cnt, CDATA->next_step));
1844 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\3\\id\\%d", CDATA->cdata_id));
1845 if(!qd0_blind_id_authenticate_with_private_id_response(CDATA->id, data_in, len_in, data_out_p, len_out))
1848 return Crypto_ServerError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_response failed", "Internal error");
1850 fpbuflen = DHKEY_SIZE;
1851 if(!qd0_blind_id_sessionkey_public_id(CDATA->id, (char *) crypto->dhkey, &fpbuflen))
1854 return Crypto_ServerError(data_out, len_out, "d0_blind_id_sessionkey_public_id failed", "Internal error");
1858 if(!qd0_blind_id_copy(CDATA->id, pubkeys[CDATA->c]))
1861 return Crypto_ServerError(data_out, len_out, "d0_blind_id_copy failed", "Internal error");
1863 CDATA->next_step = 4;
1867 // session key is FINISHED (no server part is to be expected)! By this, all keys are set up
1868 crypto->authenticated = true;
1869 CDATA->next_step = 0;
1871 data_out_p += *len_out;
1872 *len_out = data_out_p - data_out;
1873 return CRYPTO_DISCARD;
1875 else if(!strcmp(cnt, "4"))
1877 crypto = Crypto_ServerFindInstance(peeraddress, false);
1879 return CRYPTO_NOMATCH; // pre-challenge, rather be silent
1881 if(CDATA->cdata_id != id)
1882 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\id\\%d when expecting %d", id, CDATA->cdata_id));
1883 if(CDATA->next_step != 4)
1884 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\cnt\\%s when expecting %d", cnt, CDATA->next_step));
1885 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\5\\id\\%d", CDATA->cdata_id));
1886 if(!qd0_blind_id_authenticate_with_private_id_challenge(CDATA->id, true, false, data_in, len_in, data_out_p, len_out, &status))
1889 return Crypto_ServerError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_challenge failed", "Internal error");
1891 CDATA->next_step = 6;
1892 data_out_p += *len_out;
1893 *len_out = data_out_p - data_out;
1894 return CRYPTO_DISCARD;
1896 else if(!strcmp(cnt, "6"))
1898 static char msgbuf[32];
1899 size_t msgbuflen = sizeof(msgbuf);
1902 unsigned char dhkey[DHKEY_SIZE];
1903 crypto = Crypto_ServerFindInstance(peeraddress, false);
1905 return CRYPTO_NOMATCH; // pre-challenge, rather be silent
1907 if(CDATA->cdata_id != id)
1908 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\id\\%d when expecting %d", id, CDATA->cdata_id));
1909 if(CDATA->next_step != 6)
1910 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\cnt\\%s when expecting %d", cnt, CDATA->next_step));
1912 if(!qd0_blind_id_authenticate_with_private_id_verify(CDATA->id, data_in, len_in, msgbuf, &msgbuflen, &status))
1915 return Crypto_ServerError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_verify failed (authentication error)", "Authentication error");
1918 strlcpy(crypto->client_keyfp, pubkeys_fp64[CDATA->c], sizeof(crypto->client_keyfp));
1920 crypto->client_keyfp[0] = 0;
1921 memset(crypto->client_idfp, 0, sizeof(crypto->client_idfp));
1922 fpbuflen = FP64_SIZE;
1923 if(!qd0_blind_id_fingerprint64_public_id(CDATA->id, crypto->client_idfp, &fpbuflen))
1926 return Crypto_ServerError(data_out, len_out, "d0_blind_id_fingerprint64_public_id failed", "Internal error");
1928 fpbuflen = DHKEY_SIZE;
1929 if(!qd0_blind_id_sessionkey_public_id(CDATA->id, (char *) dhkey, &fpbuflen))
1932 return Crypto_ServerError(data_out, len_out, "d0_blind_id_sessionkey_public_id failed", "Internal error");
1934 // XOR the two DH keys together to make one
1935 for(i = 0; i < DHKEY_SIZE; ++i)
1936 crypto->dhkey[i] ^= dhkey[i];
1938 // session key is FINISHED (no server part is to be expected)! By this, all keys are set up
1939 crypto->authenticated = true;
1940 CDATA->next_step = 0;
1941 // send a challenge-less challenge
1942 PutWithNul(&data_out_p, len_out, "challenge ");
1943 *len_out = data_out_p - data_out;
1944 --*len_out; // remove NUL terminator
1945 return CRYPTO_MATCH;
1947 return CRYPTO_NOMATCH; // pre-challenge, rather be silent
1949 return CRYPTO_NOMATCH;
1952 int Crypto_ServerParsePacket(const char *data_in, size_t len_in, char *data_out, size_t *len_out, lhnetaddress_t *peeraddress)
1956 static double complain_time = 0;
1958 qboolean do_time = false;
1959 qboolean do_reject = false;
1960 char infostringvalue[MAX_INPUTLINE];
1961 if(crypto_servercpupercent.value > 0 || crypto_servercpumaxtime.value > 0)
1962 if(len_in > 5 && !memcmp(data_in, "d0pk\\", 5))
1965 cnt = InfoString_GetValue(data_in + 4, "cnt", infostringvalue, sizeof(infostringvalue));
1967 if(!strcmp(cnt, "0"))
1972 // check if we may perform crypto...
1973 if(crypto_servercpupercent.value > 0)
1975 crypto_servercpu_accumulator += (realtime - crypto_servercpu_lastrealtime) * crypto_servercpupercent.value * 0.01;
1976 if(crypto_servercpumaxtime.value)
1977 if(crypto_servercpu_accumulator > crypto_servercpumaxtime.value)
1978 crypto_servercpu_accumulator = crypto_servercpumaxtime.value;
1982 if(crypto_servercpumaxtime.value > 0)
1983 if(realtime != crypto_servercpu_lastrealtime)
1984 crypto_servercpu_accumulator = crypto_servercpumaxtime.value;
1986 crypto_servercpu_lastrealtime = realtime;
1987 if(do_reject && crypto_servercpu_accumulator < 0)
1989 if(realtime > complain_time + 5)
1990 Con_Printf("crypto: cannot perform requested crypto operations; denial service attack or crypto_servercpupercent/crypto_servercpumaxtime are too low\n");
1992 return CRYPTO_DISCARD;
1994 t = Sys_DirtyTime();
1996 ret = Crypto_ServerParsePacket_Internal(data_in, len_in, data_out, len_out, peeraddress);
1999 t = Sys_DirtyTime() - t;if (t < 0.0) t = 0.0; // dirtytime can step backwards
2000 if(crypto_servercpudebug.integer)
2001 Con_Printf("crypto: accumulator was %.1f ms, used %.1f ms for crypto, ", crypto_servercpu_accumulator * 1000, t * 1000);
2002 crypto_servercpu_accumulator -= t;
2003 if(crypto_servercpudebug.integer)
2004 Con_Printf("is %.1f ms\n", crypto_servercpu_accumulator * 1000);
2009 static int Crypto_ClientError(char *data_out, size_t *len_out, const char *msg)
2011 dpsnprintf(data_out, *len_out, "reject %s", msg);
2012 *len_out = strlen(data_out);
2013 return CRYPTO_REPLACE;
2016 static int Crypto_SoftClientError(char *data_out, size_t *len_out, const char *msg)
2019 Con_Printf("%s\n", msg);
2020 return CRYPTO_DISCARD;
2023 int Crypto_ClientParsePacket(const char *data_in, size_t len_in, char *data_out, size_t *len_out, lhnetaddress_t *peeraddress)
2025 crypto_t *crypto = &cls.crypto;
2026 const char *string = data_in;
2029 char *data_out_p = data_out;
2031 char infostringvalue[MAX_INPUTLINE];
2034 if(!d0_blind_id_dll)
2035 return CRYPTO_NOMATCH; // no support
2037 // if "challenge": verify challenge, and discard message, send next crypto protocol message instead
2038 // otherwise, just handle actual protocol messages
2040 if (len_in == 6 && !memcmp(string, "accept", 6) && cls.connect_trying && d0_rijndael_dll)
2042 int wantserverid = -1;
2043 Crypto_RetrieveHostKey(&cls.connect_address, &wantserverid, NULL, 0, NULL, 0, NULL);
2044 if(!crypto || !crypto->authenticated) // we ALSO get here if we are using an encrypted connection, so let's rule this out
2046 if(wantserverid >= 0)
2047 return Crypto_ClientError(data_out, len_out, "Server tried an unauthenticated connection even though a host key is present");
2048 if(crypto_aeslevel.integer >= 3)
2049 return Crypto_ClientError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)");
2051 return CRYPTO_NOMATCH;
2053 else if (len_in >= 1 && string[0] == 'j' && cls.connect_trying && d0_rijndael_dll)
2055 int wantserverid = -1;
2056 Crypto_RetrieveHostKey(&cls.connect_address, &wantserverid, NULL, 0, NULL, 0, NULL);
2057 //if(!crypto || !crypto->authenticated)
2059 if(wantserverid >= 0)
2060 return Crypto_ClientError(data_out, len_out, "Server tried an unauthenticated connection even though a host key is present");
2061 if(crypto_aeslevel.integer >= 3)
2062 return Crypto_ClientError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)");
2064 return CRYPTO_NOMATCH;
2066 else if (len_in >= 5 && BuffLittleLong((unsigned char *) string) == ((int)NETFLAG_CTL | (int)len_in))
2068 int wantserverid = -1;
2070 // these three are harmless
2071 if(string[4] == CCREP_SERVER_INFO)
2072 return CRYPTO_NOMATCH;
2073 if(string[4] == CCREP_PLAYER_INFO)
2074 return CRYPTO_NOMATCH;
2075 if(string[4] == CCREP_RULE_INFO)
2076 return CRYPTO_NOMATCH;
2078 Crypto_RetrieveHostKey(&cls.connect_address, &wantserverid, NULL, 0, NULL, 0, NULL);
2079 //if(!crypto || !crypto->authenticated)
2081 if(wantserverid >= 0)
2082 return Crypto_ClientError(data_out, len_out, "Server tried an unauthenticated connection even though a host key is present");
2083 if(crypto_aeslevel.integer >= 3)
2084 return Crypto_ClientError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)");
2086 return CRYPTO_NOMATCH;
2088 else if (len_in >= 13 && !memcmp(string, "infoResponse\x0A", 13))
2090 s = InfoString_GetValue(string + 13, "d0_blind_id", infostringvalue, sizeof(infostringvalue));
2092 Crypto_StoreHostKey(peeraddress, s, true);
2093 return CRYPTO_NOMATCH;
2095 else if (len_in >= 15 && !memcmp(string, "statusResponse\x0A", 15))
2099 p = strchr(string + 15, '\n');
2103 * (char *) p = 0; // cut off the string there
2105 s = InfoString_GetValue(string + 15, "d0_blind_id", infostringvalue, sizeof(infostringvalue));
2107 Crypto_StoreHostKey(peeraddress, s, true);
2110 * (char *) p = save;
2111 // invoking those nasal demons again (do not run this on the DS9k)
2113 return CRYPTO_NOMATCH;
2115 else if(len_in > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
2117 const char *vlen_blind_id_ptr = NULL;
2118 size_t len_blind_id_ptr = 0;
2120 const char *challenge = data_in + 10;
2123 int clientid = -1, serverid = -1, wantserverid = -1;
2124 qboolean server_can_auth = true;
2125 char wantserver_idfp[FP64_SIZE+1];
2126 int wantserver_aeslevel;
2128 // if we have a stored host key for the server, assume serverid to already be selected!
2129 // (the loop will refuse to overwrite this one then)
2130 wantserver_idfp[0] = 0;
2131 Crypto_RetrieveHostKey(&cls.connect_address, &wantserverid, NULL, 0, wantserver_idfp, sizeof(wantserver_idfp), &wantserver_aeslevel);
2132 // requirement: wantserver_idfp is a full ID if wantserverid set
2134 // if we leave, we have to consider the connection
2135 // unauthenticated; NOTE: this may be faked by a clever
2136 // attacker to force an unauthenticated connection; so we have
2137 // a safeguard check in place when encryption is required too
2138 // in place, or when authentication is required by the server
2139 crypto->authenticated = false;
2141 GetUntilNul(&data_in, &len_in);
2143 return (wantserverid >= 0) ? Crypto_ClientError(data_out, len_out, "Server tried an unauthenticated connection even though a host key is present") :
2144 (d0_rijndael_dll && crypto_aeslevel.integer >= 3) ? Crypto_ServerError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)", NULL) :
2147 // FTEQW extension protocol
2150 k = Crypto_LittleLong(data_in);
2151 v = Crypto_LittleLong(data_in + 4);
2159 k = Crypto_LittleLong(data_in);
2164 case PROTOCOL_D0_BLIND_ID:
2165 vlen_blind_id_ptr = data_in;
2166 len_blind_id_ptr = v;
2178 if(!vlen_blind_id_ptr)
2179 return (wantserverid >= 0) ? Crypto_ClientError(data_out, len_out, "Server tried an unauthenticated connection even though authentication is required") :
2180 (d0_rijndael_dll && crypto_aeslevel.integer >= 3) ? Crypto_ServerError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)", NULL) :
2183 data_in = vlen_blind_id_ptr;
2184 len_in = len_blind_id_ptr;
2186 // parse fingerprints
2187 // once we found a fingerprint we can auth to (ANY), select it as clientfp
2188 // once we found a fingerprint in the first list that we know, select it as serverfp
2192 p = GetUntilNul(&data_in, &len_in);
2197 if(!server_can_auth)
2198 break; // other protocol message may follow
2199 server_can_auth = false;
2204 for(i = 0; i < MAX_PUBKEYS; ++i)
2207 if(!strcmp(p, pubkeys_fp64[i]))
2209 if(pubkeys_havepriv[i])
2214 if(wantserverid < 0 || i == wantserverid)
2218 if(clientid >= 0 && serverid >= 0)
2222 // if stored host key is not found:
2223 if(wantserverid >= 0 && serverid < 0)
2224 return Crypto_ClientError(data_out, len_out, "Server CA does not match stored host key, refusing to connect");
2226 if(serverid >= 0 || clientid >= 0)
2228 // TODO at this point, fill clientside crypto struct!
2230 CDATA->cdata_id = ++cdata_id;
2231 CDATA->s = serverid;
2232 CDATA->c = clientid;
2233 memset(crypto->dhkey, 0, sizeof(crypto->dhkey));
2234 strlcpy(CDATA->challenge, challenge, sizeof(CDATA->challenge));
2235 crypto->client_keyfp[0] = 0;
2236 crypto->client_idfp[0] = 0;
2237 crypto->server_keyfp[0] = 0;
2238 crypto->server_idfp[0] = 0;
2239 memcpy(CDATA->wantserver_idfp, wantserver_idfp, sizeof(crypto->server_idfp));
2241 if(CDATA->wantserver_idfp[0]) // if we know a host key, honor its encryption setting
2242 switch(bound(0, d0_rijndael_dll ? crypto_aeslevel.integer : 0, 3))
2244 default: // dummy, never happens, but to make gcc happy...
2246 if(wantserver_aeslevel >= 3)
2247 return Crypto_ServerError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)", NULL);
2248 CDATA->wantserver_aes = false;
2251 CDATA->wantserver_aes = (wantserver_aeslevel >= 2);
2254 CDATA->wantserver_aes = (wantserver_aeslevel >= 1);
2257 if(wantserver_aeslevel <= 0)
2258 return Crypto_ServerError(data_out, len_out, "This server requires encryption to be supported (crypto_aeslevel >= 1, and d0_rijndael library must be present)", NULL);
2259 CDATA->wantserver_aes = true;
2263 // build outgoing message
2264 // append regular stuff
2265 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\0\\id\\%d\\aeslevel\\%d\\challenge\\%s", CDATA->cdata_id, d0_rijndael_dll ? crypto_aeslevel.integer : 0, challenge));
2266 PutWithNul(&data_out_p, len_out, serverid >= 0 ? pubkeys_fp64[serverid] : "");
2267 PutWithNul(&data_out_p, len_out, clientid >= 0 ? pubkeys_fp64[clientid] : "");
2271 // I am the client, and my key is ok... so let's set client_keyfp and client_idfp
2272 strlcpy(crypto->client_keyfp, pubkeys_fp64[CDATA->c], sizeof(crypto->client_keyfp));
2273 strlcpy(crypto->client_idfp, pubkeys_priv_fp64[CDATA->c], sizeof(crypto->client_idfp));
2279 CDATA->id = qd0_blind_id_new();
2283 return Crypto_ClientError(data_out, len_out, "d0_blind_id_new failed");
2285 if(!qd0_blind_id_copy(CDATA->id, pubkeys[CDATA->s]))
2288 return Crypto_ClientError(data_out, len_out, "d0_blind_id_copy failed");
2290 CDATA->next_step = 1;
2291 *len_out = data_out_p - data_out;
2293 else if(clientid >= 0)
2295 // skip over server auth, perform client auth only
2297 CDATA->id = qd0_blind_id_new();
2301 return Crypto_ClientError(data_out, len_out, "d0_blind_id_new failed");
2303 if(!qd0_blind_id_copy(CDATA->id, pubkeys[CDATA->c]))
2306 return Crypto_ClientError(data_out, len_out, "d0_blind_id_copy failed");
2308 if(!qd0_blind_id_authenticate_with_private_id_start(CDATA->id, true, false, "XONOTIC", 8, data_out_p, len_out)) // len_out receives used size by this op
2311 return Crypto_ClientError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_start failed");
2313 CDATA->next_step = 5;
2314 data_out_p += *len_out;
2315 *len_out = data_out_p - data_out;
2318 *len_out = data_out_p - data_out;
2320 return CRYPTO_DISCARD;
2324 if(wantserver_idfp[0]) // if we know a host key, honor its encryption setting
2325 if(wantserver_aeslevel >= 3)
2326 return Crypto_ClientError(data_out, len_out, "Server insists on encryption, but neither can authenticate to the other");
2327 return (d0_rijndael_dll && crypto_aeslevel.integer >= 3) ? Crypto_ServerError(data_out, len_out, "This server requires encryption to be not required (crypto_aeslevel <= 2)", NULL) :
2331 else if(len_in > 5 && !memcmp(string, "d0pk\\", 5) && cls.connect_trying)
2335 cnt = InfoString_GetValue(string + 4, "id", infostringvalue, sizeof(infostringvalue));
2336 id = (cnt ? atoi(cnt) : -1);
2337 cnt = InfoString_GetValue(string + 4, "cnt", infostringvalue, sizeof(infostringvalue));
2339 return Crypto_ClientError(data_out, len_out, "d0pk\\ message without cnt");
2340 GetUntilNul(&data_in, &len_in);
2342 return Crypto_ClientError(data_out, len_out, "d0pk\\ message without attachment");
2344 if(!strcmp(cnt, "1"))
2347 if(CDATA->cdata_id != id)
2348 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\id\\%d when expecting %d", id, CDATA->cdata_id));
2349 if(CDATA->next_step != 1)
2350 return Crypto_SoftClientError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\cnt\\%s when expecting %d", cnt, CDATA->next_step));
2352 cls.connect_nextsendtime = max(cls.connect_nextsendtime, realtime + 1); // prevent "hammering"
2354 if((s = InfoString_GetValue(string + 4, "aes", infostringvalue, sizeof(infostringvalue))))
2358 // we CANNOT toggle the AES status any more!
2359 // as the server already decided
2360 if(CDATA->wantserver_idfp[0]) // if we know a host key, honor its encryption setting
2361 if(!aes && CDATA->wantserver_aes)
2364 return Crypto_ClientError(data_out, len_out, "Stored host key requires encryption, but server did not enable encryption");
2366 if(aes && (!d0_rijndael_dll || crypto_aeslevel.integer <= 0))
2369 return Crypto_ClientError(data_out, len_out, "Server insists on encryption too hard");
2371 if(!aes && (d0_rijndael_dll && crypto_aeslevel.integer >= 3))
2374 return Crypto_ClientError(data_out, len_out, "Server insists on plaintext too hard");
2376 crypto->use_aes = aes != 0;
2378 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\2\\id\\%d", CDATA->cdata_id));
2379 if(!qd0_blind_id_authenticate_with_private_id_challenge(CDATA->id, true, false, data_in, len_in, data_out_p, len_out, &status))
2382 return Crypto_ClientError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_challenge failed");
2384 CDATA->next_step = 3;
2385 data_out_p += *len_out;
2386 *len_out = data_out_p - data_out;
2387 return CRYPTO_DISCARD;
2389 else if(!strcmp(cnt, "3"))
2391 static char msgbuf[32];
2392 size_t msgbuflen = sizeof(msgbuf);
2396 if(CDATA->cdata_id != id)
2397 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\id\\%d when expecting %d", id, CDATA->cdata_id));
2398 if(CDATA->next_step != 3)
2399 return Crypto_SoftClientError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\cnt\\%s when expecting %d", cnt, CDATA->next_step));
2401 cls.connect_nextsendtime = max(cls.connect_nextsendtime, realtime + 1); // prevent "hammering"
2403 if(!qd0_blind_id_authenticate_with_private_id_verify(CDATA->id, data_in, len_in, msgbuf, &msgbuflen, &status))
2406 return Crypto_ClientError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_verify failed (server authentication error)");
2409 strlcpy(crypto->server_keyfp, pubkeys_fp64[CDATA->s], sizeof(crypto->server_keyfp));
2411 crypto->server_keyfp[0] = 0;
2412 memset(crypto->server_idfp, 0, sizeof(crypto->server_idfp));
2413 fpbuflen = FP64_SIZE;
2414 if(!qd0_blind_id_fingerprint64_public_id(CDATA->id, crypto->server_idfp, &fpbuflen))
2417 return Crypto_ClientError(data_out, len_out, "d0_blind_id_fingerprint64_public_id failed");
2419 if(CDATA->wantserver_idfp[0])
2420 if(memcmp(CDATA->wantserver_idfp, crypto->server_idfp, sizeof(crypto->server_idfp)))
2423 return Crypto_ClientError(data_out, len_out, "Server ID does not match stored host key, refusing to connect");
2425 fpbuflen = DHKEY_SIZE;
2426 if(!qd0_blind_id_sessionkey_public_id(CDATA->id, (char *) crypto->dhkey, &fpbuflen))
2429 return Crypto_ClientError(data_out, len_out, "d0_blind_id_sessionkey_public_id failed");
2432 // cache the server key
2433 Crypto_StoreHostKey(&cls.connect_address, va(vabuf, sizeof(vabuf), "%d %s@%s", crypto->use_aes ? 1 : 0, crypto->server_idfp, pubkeys_fp64[CDATA->s]), false);
2437 // client will auth next
2438 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\4\\id\\%d", CDATA->cdata_id));
2439 if(!qd0_blind_id_copy(CDATA->id, pubkeys[CDATA->c]))
2442 return Crypto_ClientError(data_out, len_out, "d0_blind_id_copy failed");
2444 if(!qd0_blind_id_authenticate_with_private_id_start(CDATA->id, true, false, "XONOTIC", 8, data_out_p, len_out)) // len_out receives used size by this op
2447 return Crypto_ClientError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_start failed");
2449 CDATA->next_step = 5;
2450 data_out_p += *len_out;
2451 *len_out = data_out_p - data_out;
2452 return CRYPTO_DISCARD;
2456 // session key is FINISHED (no server part is to be expected)! By this, all keys are set up
2457 crypto->authenticated = true;
2458 CDATA->next_step = 0;
2459 // assume we got the empty challenge to finish the protocol
2460 PutWithNul(&data_out_p, len_out, "challenge ");
2461 *len_out = data_out_p - data_out;
2462 --*len_out; // remove NUL terminator
2463 return CRYPTO_REPLACE;
2466 else if(!strcmp(cnt, "5"))
2469 unsigned char dhkey[DHKEY_SIZE];
2473 if(CDATA->cdata_id != id)
2474 return Crypto_SoftServerError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\id\\%d when expecting %d", id, CDATA->cdata_id));
2475 if(CDATA->next_step != 5)
2476 return Crypto_SoftClientError(data_out, len_out, va(vabuf, sizeof(vabuf), "Got d0pk\\cnt\\%s when expecting %d", cnt, CDATA->next_step));
2478 cls.connect_nextsendtime = max(cls.connect_nextsendtime, realtime + 1); // prevent "hammering"
2480 if(CDATA->s < 0) // only if server didn't auth
2482 if((s = InfoString_GetValue(string + 4, "aes", infostringvalue, sizeof(infostringvalue))))
2486 if(CDATA->wantserver_idfp[0]) // if we know a host key, honor its encryption setting
2487 if(!aes && CDATA->wantserver_aes)
2490 return Crypto_ClientError(data_out, len_out, "Stored host key requires encryption, but server did not enable encryption");
2492 if(aes && (!d0_rijndael_dll || crypto_aeslevel.integer <= 0))
2495 return Crypto_ClientError(data_out, len_out, "Server insists on encryption too hard");
2497 if(!aes && (d0_rijndael_dll && crypto_aeslevel.integer >= 3))
2500 return Crypto_ClientError(data_out, len_out, "Server insists on plaintext too hard");
2502 crypto->use_aes = aes != 0;
2505 PutWithNul(&data_out_p, len_out, va(vabuf, sizeof(vabuf), "d0pk\\cnt\\6\\id\\%d", CDATA->cdata_id));
2506 if(!qd0_blind_id_authenticate_with_private_id_response(CDATA->id, data_in, len_in, data_out_p, len_out))
2509 return Crypto_ClientError(data_out, len_out, "d0_blind_id_authenticate_with_private_id_response failed");
2511 fpbuflen = DHKEY_SIZE;
2512 if(!qd0_blind_id_sessionkey_public_id(CDATA->id, (char *) dhkey, &fpbuflen))
2515 return Crypto_ClientError(data_out, len_out, "d0_blind_id_sessionkey_public_id failed");
2517 // XOR the two DH keys together to make one
2518 for(i = 0; i < DHKEY_SIZE; ++i)
2519 crypto->dhkey[i] ^= dhkey[i];
2520 // session key is FINISHED! By this, all keys are set up
2521 crypto->authenticated = true;
2522 CDATA->next_step = 0;
2523 data_out_p += *len_out;
2524 *len_out = data_out_p - data_out;
2525 return CRYPTO_DISCARD;
2527 return Crypto_SoftClientError(data_out, len_out, "Got unknown d0_blind_id message from server");
2530 return CRYPTO_NOMATCH;
2533 size_t Crypto_SignData(const void *data, size_t datasize, int keyid, void *signed_data, size_t signed_size)
2535 if(keyid < 0 || keyid >= MAX_PUBKEYS)
2537 if(!pubkeys_havepriv[keyid])
2539 if(qd0_blind_id_sign_with_private_id_sign(pubkeys[keyid], true, false, (const char *)data, datasize, (char *)signed_data, &signed_size))
2544 size_t Crypto_SignDataDetached(const void *data, size_t datasize, int keyid, void *signed_data, size_t signed_size)
2546 if(keyid < 0 || keyid >= MAX_PUBKEYS)
2548 if(!pubkeys_havepriv[keyid])
2550 if(qd0_blind_id_sign_with_private_id_sign_detached(pubkeys[keyid], true, false, (const char *)data, datasize, (char *)signed_data, &signed_size))