implement digest_hex()

[xonotic/darkplaces.git] / prvm_cmds.c

diff --git a/prvm_cmds.c b/prvm_cmds.c
index 716762eddc42ef56b32069a258b272bff396475d..51a3648ff69524c1f8192cbf68bfdc776d8a7bcd 100644 (file)
--- a/prvm_cmds.c
+++ b/prvm_cmds.c
@@ -280,6 +280,13 @@ static qboolean checkextension(const char *name)
                                return false;
 #endif
                        }
+
+                       // special sheck for d0_blind_id
+                       if (!strcasecmp("DP_CRYPTO", name))
+                               return Crypto_Available();
+                       if (!strcasecmp("DP_QC_DIGEST_SHA256", name))
+                               return Crypto_Available();
+
                        return true;
                }
        }
@@ -5634,12 +5641,61 @@ void VM_crc16(void)
 {
        float insensitive;
        static char s[VM_STRINGTEMP_LENGTH];
-       VM_SAFEPARMCOUNTRANGE(2, 8, VM_hash);
+       VM_SAFEPARMCOUNTRANGE(2, 8, VM_crc16);
        insensitive = PRVM_G_FLOAT(OFS_PARM0);
        VM_VarString(1, s, sizeof(s));
        PRVM_G_FLOAT(OFS_RETURN) = (unsigned short) ((insensitive ? CRC_Block_CaseInsensitive : CRC_Block) ((unsigned char *) s, strlen(s)));
 }
 
+// #639 float(string digest, string data, ...) digest_hex
+void VM_digest_hex(void)
+{
+       const char *digest;
+
+       static char out[32];
+       static char outhex[65];
+       int outlen;
+
+       static char s[VM_STRINGTEMP_LENGTH];
+       int len;
+
+       VM_SAFEPARMCOUNTRANGE(2, 8, VM_digest_hex);
+       digest = PRVM_G_STRING(OFS_PARM0);
+       if(!digest)
+               digest = "";
+       VM_VarString(1, s, sizeof(s));
+       len = strlen(s);
+
+       outlen = 0;
+
+       if(!strcmp(digest, "MD4"))
+       {
+               outlen = 16;
+               mdfour(&out, s, len);
+       }
+       else if(!strcmp(digest, "SHA256") && Crypto_Available())
+       {
+               outlen = 32;
+               sha256(&out, s, len);
+       }
+       // no warning needed on mismatch - we return string_null to QC
+
+       if(outlen)
+       {
+               int i;
+               static const char *hexmap = "0123456789abcdef";
+               for(i = 0; i < outlen; ++i)
+               {
+                       outhex[2*i]   = hexmap[(out[i] >> 4) & 15];
+                       outhex[2*i+1] = hexmap[(out[i] >> 0) & 15];
+               }
+               outhex[2*i] = 0;
+               PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(outhex);
+       }
+       else
+               PRVM_G_INT(OFS_RETURN) = 0;
+}
+
 void VM_wasfreed (void)
 {
        VM_SAFEPARMCOUNT(1, VM_wasfreed);