HTTPDigest.cpp
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#include "MD5.h"
#include <string.h>
#include "HTTPDigest.h"
#ifdef _WIN32
//#define strcasecmp _stricmp
//#define strncasecmp _strnicmp
#endif
#ifdef _MSC_VER
#define strcasecmp _stricmp
#define strncasecmp _strnicmp
#endif
void my_CvtHex(
IN HASH Bin,
OUT HASHHEX Hex
)
{
unsigned short i;
unsigned char j;
for (i = 0; i < HASHLEN; i++) {
j = (Bin[i] >> 4) & 0xf;
if (j <= 9)
Hex[i*2] = (j + '0');
else
Hex[i*2] = (j + 'a' - 10);
j = Bin[i] & 0xf;
if (j <= 9)
Hex[i*2+1] = (j + '0');
else
Hex[i*2+1] = (j + 'a' - 10);
};
Hex[HASHHEXLEN] = '\0';
}
/* calculate H(A1) as per spec */
void
DigestCalcHA1 (IN const char *pszAlg,
IN const char *pszUserName,
IN const char *pszRealm,
IN const char *pszPassword,
IN const char *pszNonce,
IN const char *pszCNonce,
OUT HASHHEX SessionKey)
{
MD5_CTX Md5Ctx;
HASH HA1;
MD5Init (&Md5Ctx);
MD5Update (&Md5Ctx, (unsigned char *) pszUserName, (unsigned int) strlen (pszUserName));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszRealm, (unsigned int) strlen (pszRealm));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszPassword, (unsigned int) strlen (pszPassword));
MD5Final ((unsigned char *) HA1, &Md5Ctx);
if ((pszAlg != NULL) && strcasecmp (pszAlg, "md5-sess") == 0) {
MD5Init (&Md5Ctx);
MD5Update (&Md5Ctx, (unsigned char *) HA1, HASHLEN);
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszNonce, (unsigned int) strlen (pszNonce));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszCNonce, (unsigned int) strlen (pszCNonce));
MD5Final ((unsigned char *) HA1, &Md5Ctx);
}
my_CvtHex (HA1, SessionKey);
}
/* calculate request-digest/response-digest as per HTTP Digest spec */
void
DigestCalcResponse (IN HASHHEX HA1, /* H(A1) */
IN const char *pszNonce, /* nonce from server */
IN const char *pszNonceCount, /* 8 hex digits */
IN const char *pszCNonce, /* client nonce */
IN const char *pszQop, /* qop-value: "", "auth", "auth-int" */
IN int Aka, /* Calculating AKAv1-MD5 response */
IN const char *pszMethod, /* method from the request */
IN const char *pszDigestUri, /* requested URL */
IN HASHHEX HEntity, /* H(entity body) if qop="auth-int" */
OUT HASHHEX Response
/* request-digest or response-digest */ )
{
MD5_CTX Md5Ctx;
HASH HA2;
HASH RespHash;
HASHHEX HA2Hex;
/* calculate H(A2) */
MD5Init (&Md5Ctx);
MD5Update (&Md5Ctx, (unsigned char *) pszMethod, (unsigned int) strlen (pszMethod));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszDigestUri, (unsigned int) strlen (pszDigestUri));
if (pszQop == NULL) {
goto auth_withoutqop;
}
else if (0 == strcasecmp (pszQop, "auth-int")) {
goto auth_withauth_int;
}
else if (0 == strcasecmp (pszQop, "auth")) {
goto auth_withauth;
}
auth_withoutqop:
MD5Final ((unsigned char *) HA2, &Md5Ctx);
my_CvtHex (HA2, HA2Hex);
/* calculate response */
MD5Init (&Md5Ctx);
MD5Update (&Md5Ctx, (unsigned char *) HA1, HASHHEXLEN);
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszNonce, (unsigned int) strlen (pszNonce));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
goto end;
auth_withauth_int:
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) HEntity, HASHHEXLEN);
auth_withauth:
MD5Final ((unsigned char *) HA2, &Md5Ctx);
my_CvtHex (HA2, HA2Hex);
/* calculate response */
MD5Init (&Md5Ctx);
MD5Update (&Md5Ctx, (unsigned char *) HA1, HASHHEXLEN);
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszNonce, (unsigned int) strlen (pszNonce));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
if (Aka == 0) {
MD5Update (&Md5Ctx, (unsigned char *) pszNonceCount, (unsigned int) strlen (pszNonceCount));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszCNonce, (unsigned int) strlen (pszCNonce));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
MD5Update (&Md5Ctx, (unsigned char *) pszQop, (unsigned int) strlen (pszQop));
MD5Update (&Md5Ctx, (unsigned char *) ":", 1);
}
end:
MD5Update (&Md5Ctx, (unsigned char *) HA2Hex, HASHHEXLEN);
MD5Final ((unsigned char *) RespHash, &Md5Ctx);
my_CvtHex (RespHash, Response);
}