RTDECL(uint8_t const *) RTCrDigestGetHash(RTCRDIGEST hDigest)
{
PRTCRDIGESTINT pThis = hDigest;
AssertPtrReturn(pThis, NULL);
AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, NULL);
int rc = RTCrDigestFinal(pThis, NULL, 0);
AssertRCReturn(rc, NULL);
return &pThis->abState[pThis->offHash];
}
RTDECL(bool) RTCrDigestMatch(RTCRDIGEST hDigest, void const *pvHash, size_t cbHash)
{
PRTCRDIGESTINT pThis = hDigest;
int rc = RTCrDigestFinal(pThis, NULL, 0);
AssertRCReturn(rc, false);
AssertPtrReturn(pvHash, false);
return pThis->pDesc->cbHash == cbHash
&& !memcmp(&pThis->abState[pThis->offHash], pvHash, cbHash);
}
/**
* Verifies a counter signature.
*
* @returns IPRT status code.
* @param pCounterSignerInfo The counter signature.
* @param pPrimarySignerInfo The primary signature (can be a counter
* signature too if nested).
* @param pSignedData The SignedData.
* @param fFlags Verficiation flags.
* @param hAdditionalCerts Store containing optional certificates,
* optional.
* @param hTrustedCerts Store containing trusted certificates, required.
* @param pValidationTime The time we're supposed to validate the
* certificates chains at.
* @param pfnVerifyCert Signing certificate verification callback.
* @param fVccFlags Signing certificate verification callback flags.
* @param pvUser Callback parameter.
* @param pErrInfo Where to store additional error details,
* optional.
*/
static int rtCrPkcs7VerifyCounterSignerInfo(PCRTCRPKCS7SIGNERINFO pCounterSignerInfo, PCRTCRPKCS7SIGNERINFO pPrimarySignerInfo,
PCRTCRPKCS7SIGNEDDATA pSignedData, uint32_t fFlags,
RTCRSTORE hAdditionalCerts, RTCRSTORE hTrustedCerts, PCRTTIMESPEC pValidationTime,
PFNRTCRPKCS7VERIFYCERTCALLBACK pfnVerifyCert, uint32_t fVccFlags,
void *pvUser, PRTERRINFO pErrInfo)
{
/*
* Calculate the digest we need to verify.
*/
RTCRDIGEST hDigest;
int rc = RTCrDigestCreateByObjId(&hDigest, &pCounterSignerInfo->DigestAlgorithm.Algorithm);
if (RT_SUCCESS(rc))
{
rc = RTCrDigestUpdate(hDigest,
pPrimarySignerInfo->EncryptedDigest.Asn1Core.uData.pv,
pPrimarySignerInfo->EncryptedDigest.Asn1Core.cb);
if (RT_SUCCESS(rc))
rc = RTCrDigestFinal(hDigest, NULL, 0);
if (RT_SUCCESS(rc))
{
/*
* Pass it on to the common SignerInfo verifier function.
*/
rc = rtCrPkcs7VerifySignerInfo(pCounterSignerInfo, pSignedData, hDigest,
fFlags | RTCRPKCS7VERIFY_SD_F_COUNTER_SIGNATURE,
hAdditionalCerts, hTrustedCerts, pValidationTime,
pfnVerifyCert, fVccFlags, pvUser, pErrInfo);
}
else
rc = RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_CALC_ERROR,
"Hashing for counter signature failed unexpectedly: %Rrc", rc);
RTCrDigestRelease(hDigest);
}
else
rc = RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_CREATE_ERROR, "Error creating digest for '%s': %Rrc",
pCounterSignerInfo->DigestAlgorithm.Algorithm.szObjId, rc);
return rc;
}
int main(int argc, char **argv)
{
RTR3InitExe(argc, &argv, 0);
RTDIGESTTYPE enmDigestType = RTDIGESTTYPE_INVALID;
const char *pszDigestType = "NotSpecified";
enum
{
kMethod_Full,
kMethod_Block,
kMethod_File,
kMethod_CVAS
} enmMethod = kMethod_Block;
uint64_t offStart = 0;
uint64_t cbMax = UINT64_MAX;
bool fTestcase = false;
static const RTGETOPTDEF s_aOptions[] =
{
{ "--type", 't', RTGETOPT_REQ_STRING },
{ "--method", 'm', RTGETOPT_REQ_STRING },
{ "--help", 'h', RTGETOPT_REQ_NOTHING },
{ "--length", 'l', RTGETOPT_REQ_UINT64 },
{ "--offset", 'o', RTGETOPT_REQ_UINT64 },
{ "--testcase", 'x', RTGETOPT_REQ_NOTHING },
};
int ch;
RTGETOPTUNION ValueUnion;
RTGETOPTSTATE GetState;
RTGetOptInit(&GetState, argc, argv, s_aOptions, RT_ELEMENTS(s_aOptions), 1, RTGETOPTINIT_FLAGS_OPTS_FIRST);
while ((ch = RTGetOpt(&GetState, &ValueUnion)))
{
switch (ch)
{
case 't':
if (!RTStrICmp(ValueUnion.psz, "crc32"))
{
pszDigestType = "CRC32";
enmDigestType = RTDIGESTTYPE_CRC32;
}
else if (!RTStrICmp(ValueUnion.psz, "crc64"))
{
pszDigestType = "CRC64";
enmDigestType = RTDIGESTTYPE_CRC64;
}
else if (!RTStrICmp(ValueUnion.psz, "md2"))
{
pszDigestType = "MD2";
enmDigestType = RTDIGESTTYPE_MD2;
}
else if (!RTStrICmp(ValueUnion.psz, "md5"))
{
pszDigestType = "MD5";
enmDigestType = RTDIGESTTYPE_MD5;
}
else if (!RTStrICmp(ValueUnion.psz, "sha1"))
{
pszDigestType = "SHA-1";
enmDigestType = RTDIGESTTYPE_SHA1;
}
else if (!RTStrICmp(ValueUnion.psz, "sha224"))
{
pszDigestType = "SHA-224";
enmDigestType = RTDIGESTTYPE_SHA224;
}
else if (!RTStrICmp(ValueUnion.psz, "sha256"))
{
pszDigestType = "SHA-256";
enmDigestType = RTDIGESTTYPE_SHA256;
}
else if (!RTStrICmp(ValueUnion.psz, "sha384"))
{
pszDigestType = "SHA-384";
enmDigestType = RTDIGESTTYPE_SHA384;
}
else if (!RTStrICmp(ValueUnion.psz, "sha512"))
{
pszDigestType = "SHA-512";
enmDigestType = RTDIGESTTYPE_SHA512;
}
else if (!RTStrICmp(ValueUnion.psz, "sha512/224"))
{
pszDigestType = "SHA-512/224";
enmDigestType = RTDIGESTTYPE_SHA512T224;
}
else if (!RTStrICmp(ValueUnion.psz, "sha512/256"))
{
pszDigestType = "SHA-512/256";
enmDigestType = RTDIGESTTYPE_SHA512T256;
}
else
{
Error("Invalid digest type: %s\n", ValueUnion.psz);
return 1;
}
break;
case 'm':
if (!RTStrICmp(ValueUnion.psz, "full"))
enmMethod = kMethod_Full;
else if (!RTStrICmp(ValueUnion.psz, "block"))
enmMethod = kMethod_Block;
else if (!RTStrICmp(ValueUnion.psz, "file"))
enmMethod = kMethod_File;
else if (!RTStrICmp(ValueUnion.psz, "cvas"))
enmMethod = kMethod_CVAS;
else
{
Error("Invalid digest method: %s\n", ValueUnion.psz);
return 1;
}
break;
case 'l':
cbMax = ValueUnion.u64;
break;
case 'o':
offStart = ValueUnion.u64;
break;
case 'x':
fTestcase = true;
break;
case 'h':
RTPrintf("usage: tstRTDigest -t <digest-type> [-o <offset>] [-l <length>] [-x] file [file2 [..]]\n");
return 1;
case VINF_GETOPT_NOT_OPTION:
{
if (enmDigestType == RTDIGESTTYPE_INVALID)
return Error("No digest type was specified\n");
switch (enmMethod)
{
case kMethod_Full:
return Error("Full file method is not implemented\n");
case kMethod_File:
if (offStart != 0 || cbMax != UINT64_MAX)
return Error("The -l and -o options do not work with the 'file' method.");
switch (enmDigestType)
{
case RTDIGESTTYPE_SHA1:
{
char *pszDigest;
int rc = RTSha1DigestFromFile(ValueUnion.psz, &pszDigest, NULL, NULL);
if (RT_FAILURE(rc))
return Error("RTSha1Digest(%s,) -> %Rrc\n", ValueUnion.psz, rc);
RTPrintf("%s %s\n", pszDigest, ValueUnion.psz);
RTStrFree(pszDigest);
break;
}
case RTDIGESTTYPE_SHA256:
{
char *pszDigest;
int rc = RTSha256DigestFromFile(ValueUnion.psz, &pszDigest, NULL, NULL);
if (RT_FAILURE(rc))
return Error("RTSha256Digest(%s,) -> %Rrc\n", ValueUnion.psz, rc);
RTPrintf("%s %s\n", pszDigest, ValueUnion.psz);
RTStrFree(pszDigest);
break;
}
default:
return Error("The file method isn't implemented for this digest\n");
}
break;
case kMethod_Block:
{
RTFILE hFile;
int rc = RTFileOpen(&hFile, ValueUnion.psz, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_WRITE);
if (RT_FAILURE(rc))
return Error("RTFileOpen(,%s,) -> %Rrc\n", ValueUnion.psz, rc);
if (offStart != 0)
{
rc = RTFileSeek(hFile, offStart, RTFILE_SEEK_BEGIN, NULL);
if (RT_FAILURE(rc))
return Error("RTFileSeek(%s,%ull) -> %Rrc\n", ValueUnion.psz, offStart, rc);
}
uint64_t cbMaxLeft = cbMax;
size_t cbRead;
uint8_t abBuf[_64K];
char *pszDigest = (char *)&abBuf[0];
switch (enmDigestType)
{
case RTDIGESTTYPE_CRC32:
{
uint32_t uCRC32 = RTCrc32Start();
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
uCRC32 = RTCrc32Process(uCRC32, abBuf, cbRead);
}
uCRC32 = RTCrc32Finish(uCRC32);
RTStrPrintf(pszDigest, sizeof(abBuf), "%08RX32", uCRC32);
break;
}
case RTDIGESTTYPE_CRC64:
{
uint64_t uCRC64 = RTCrc64Start();
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
uCRC64 = RTCrc64Process(uCRC64, abBuf, cbRead);
}
uCRC64 = RTCrc64Finish(uCRC64);
RTStrPrintf(pszDigest, sizeof(abBuf), "%016RX64", uCRC64);
break;
}
case RTDIGESTTYPE_MD2:
{
RTMD2CONTEXT Ctx;
RTMd2Init(&Ctx);
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
RTMd2Update(&Ctx, abBuf, cbRead);
}
uint8_t abDigest[RTMD2_HASH_SIZE];
RTMd2Final(&Ctx, abDigest);
RTMd2ToString(abDigest, pszDigest, sizeof(abBuf));
break;
}
case RTDIGESTTYPE_MD5:
{
RTMD5CONTEXT Ctx;
RTMd5Init(&Ctx);
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
RTMd5Update(&Ctx, abBuf, cbRead);
}
uint8_t abDigest[RTMD5HASHSIZE];
RTMd5Final(abDigest, &Ctx);
RTMd5ToString(abDigest, pszDigest, sizeof(abBuf));
break;
}
case RTDIGESTTYPE_SHA1:
{
RTSHA1CONTEXT Ctx;
RTSha1Init(&Ctx);
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
RTSha1Update(&Ctx, abBuf, cbRead);
}
uint8_t abDigest[RTSHA1_HASH_SIZE];
RTSha1Final(&Ctx, abDigest);
RTSha1ToString(abDigest, pszDigest, sizeof(abBuf));
break;
}
case RTDIGESTTYPE_SHA256:
{
RTSHA256CONTEXT Ctx;
RTSha256Init(&Ctx);
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
RTSha256Update(&Ctx, abBuf, cbRead);
}
uint8_t abDigest[RTSHA256_HASH_SIZE];
RTSha256Final(&Ctx, abDigest);
RTSha256ToString(abDigest, pszDigest, sizeof(abBuf));
break;
}
case RTDIGESTTYPE_SHA512:
{
RTSHA512CONTEXT Ctx;
RTSha512Init(&Ctx);
for (;;)
{
rc = MyReadFile(hFile, abBuf, sizeof(abBuf), &cbRead, &cbMaxLeft);
if (RT_FAILURE(rc) || !cbRead)
break;
RTSha512Update(&Ctx, abBuf, cbRead);
}
uint8_t abDigest[RTSHA512_HASH_SIZE];
RTSha512Final(&Ctx, abDigest);
RTSha512ToString(abDigest, pszDigest, sizeof(abBuf));
break;
}
default:
return Error("Internal error #1\n");
}
RTFileClose(hFile);
if (RT_FAILURE(rc) && rc != VERR_EOF)
{
RTPrintf("Partial: %s %s\n", pszDigest, ValueUnion.psz);
return Error("RTFileRead(%s) -> %Rrc\n", ValueUnion.psz, rc);
}
if (!fTestcase)
RTPrintf("%s %s\n", pszDigest, ValueUnion.psz);
else if (offStart)
RTPrintf(" { &g_abRandom72KB[%#4llx], %5llu, \"%s\", \"%s %llu bytes @%llu\" },\n",
offStart, cbMax - cbMaxLeft, pszDigest, pszDigestType, offStart, cbMax - cbMaxLeft);
else
RTPrintf(" { &g_abRandom72KB[0], %5llu, \"%s\", \"%s %llu bytes\" },\n",
cbMax - cbMaxLeft, pszDigest, pszDigestType, cbMax - cbMaxLeft);
break;
}
/*
* Process a SHS response file:
* http://csrc.nist.gov/groups/STM/cavp/index.html#03
*/
case kMethod_CVAS:
{
RTCRDIGEST hDigest;
int rc = RTCrDigestCreateByType(&hDigest, enmDigestType);
if (RT_FAILURE(rc))
return Error("Failed to create digest calculator for %s: %Rrc", pszDigestType, rc);
uint32_t const cbDigest = RTCrDigestGetHashSize(hDigest);
if (!cbDigest || cbDigest >= _1K)
return Error("Unexpected hash size: %#x\n", cbDigest);
PRTSTREAM pFile;
rc = RTStrmOpen(ValueUnion.psz, "r", &pFile);
if (RT_FAILURE(rc))
return Error("Failed to open CVAS file '%s': %Rrc", ValueUnion.psz, rc);
/*
* Parse the input file.
* ASSUME order: Len, Msg, MD.
*/
static char s_szLine[_256K];
char *psz;
uint32_t cPassed = 0;
uint32_t cErrors = 0;
uint32_t iLine = 1;
for (;;)
{
psz = MyGetNextSignificantLine(pFile, s_szLine, sizeof(s_szLine), &iLine, &rc);
if (!psz)
break;
/* Skip [L = 20] stuff. */
if (*psz == '[')
continue;
/* Message length. */
uint64_t cMessageBits;
if (RTStrNICmp(psz, RT_STR_TUPLE("Len =")))
return Error("%s(%d): Expected 'Len =' found '%.10s...'", ValueUnion.psz, iLine, psz);
psz = RTStrStripL(psz + 5);
rc = RTStrToUInt64Full(psz, 0, &cMessageBits);
if (rc != VINF_SUCCESS)
return Error("%s(%d): Error parsing length '%s': %Rrc\n", ValueUnion.psz, iLine, psz, rc);
/* The message text. */
psz = MyGetNextSignificantLine(pFile, s_szLine, sizeof(s_szLine), &iLine, &rc);
if (!psz)
return Error("%s(%d): Expected message text not EOF.", ValueUnion.psz, iLine);
if (RTStrNICmp(psz, RT_STR_TUPLE("Msg =")))
return Error("%s(%d): Expected 'Msg =' found '%.10s...'", ValueUnion.psz, iLine, psz);
psz = RTStrStripL(psz + 5);
size_t const cbMessage = (cMessageBits + 7) / 8;
static uint8_t s_abMessage[sizeof(s_szLine) / 2];
if (cbMessage > 0)
{
rc = RTStrConvertHexBytes(psz, s_abMessage, cbMessage, 0 /*fFlags*/);
if (rc != VINF_SUCCESS)
return Error("%s(%d): Error parsing message '%.10s...': %Rrc\n",
ValueUnion.psz, iLine, psz, rc);
}
/* The message digest. */
psz = MyGetNextSignificantLine(pFile, s_szLine, sizeof(s_szLine), &iLine, &rc);
if (!psz)
return Error("%s(%d): Expected message digest not EOF.", ValueUnion.psz, iLine);
if (RTStrNICmp(psz, RT_STR_TUPLE("MD =")))
return Error("%s(%d): Expected 'MD =' found '%.10s...'", ValueUnion.psz, iLine, psz);
psz = RTStrStripL(psz + 4);
static uint8_t s_abExpectedDigest[_1K];
rc = RTStrConvertHexBytes(psz, s_abExpectedDigest, cbDigest, 0 /*fFlags*/);
if (rc != VINF_SUCCESS)
return Error("%s(%d): Error parsing message digest '%.10s...': %Rrc\n",
ValueUnion.psz, iLine, psz, rc);
/*
* Do the testing.
*/
rc = RTCrDigestReset(hDigest);
if (rc != VINF_SUCCESS)
return Error("RTCrDigestReset failed: %Rrc", rc);
rc = RTCrDigestUpdate(hDigest, s_abMessage, cbMessage);
if (rc != VINF_SUCCESS)
return Error("RTCrDigestUpdate failed: %Rrc", rc);
static uint8_t s_abActualDigest[_1K];
rc = RTCrDigestFinal(hDigest, s_abActualDigest, cbDigest);
if (rc != VINF_SUCCESS)
return Error("RTCrDigestFinal failed: %Rrc", rc);
if (memcmp(s_abActualDigest, s_abExpectedDigest, cbDigest) == 0)
cPassed++;
else
{
Error("%s(%d): Message digest mismatch. Expected %.*RThxs, got %.*RThxs.",
ValueUnion.psz, iLine, cbDigest, s_abExpectedDigest, cbDigest, s_abActualDigest);
cErrors++;
}
}
RTStrmClose(pFile);
if (cErrors > 0)
return Error("Failed: %u error%s (%u passed)", cErrors, cErrors == 1 ? "" : "s", cPassed);
RTPrintf("Passed %u test%s.\n", cPassed, cPassed == 1 ? "" : "s");
if (RT_FAILURE(rc))
return Error("Failed: %Rrc", rc);
break;
}
default:
return Error("Internal error #2\n");
}
break;
}
default:
return RTGetOptPrintError(ch, &ValueUnion);
}
}
return 0;
}
RTDECL(int) RTCrPkcs7VerifySignedData(PCRTCRPKCS7CONTENTINFO pContentInfo, uint32_t fFlags,
RTCRSTORE hAdditionalCerts, RTCRSTORE hTrustedCerts,
PCRTTIMESPEC pValidationTime, PFNRTCRPKCS7VERIFYCERTCALLBACK pfnVerifyCert, void *pvUser,
PRTERRINFO pErrInfo)
{
/*
* Check the input.
*/
if (pfnVerifyCert)
AssertPtrReturn(pfnVerifyCert, VERR_INVALID_POINTER);
else
pfnVerifyCert = RTCrPkcs7VerifyCertCallbackDefault;
if (!RTCrPkcs7ContentInfo_IsSignedData(pContentInfo))
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_NOT_SIGNED_DATA, "Not PKCS #7 SignedData.");
PCRTCRPKCS7SIGNEDDATA pSignedData = pContentInfo->u.pSignedData;
int rc = RTCrPkcs7SignedData_CheckSanity(pSignedData, 0, pErrInfo, "");
if (RT_FAILURE(rc))
return rc;
/*
* Hash the content info.
*/
/* Exactly what the content is, for some stupid reason unnecessarily
complicated. Figure it out here as we'll need it for the OpenSSL code
path as well. */
void const *pvContent = pSignedData->ContentInfo.Content.Asn1Core.uData.pv;
uint32_t cbContent = pSignedData->ContentInfo.Content.Asn1Core.cb;
if (pSignedData->ContentInfo.Content.pEncapsulated)
{
pvContent = pSignedData->ContentInfo.Content.pEncapsulated->uData.pv;
cbContent = pSignedData->ContentInfo.Content.pEncapsulated->cb;
}
/* Check that there aren't too many or too few hash algorithms for our
implementation and purposes. */
RTCRDIGEST ahDigests[2];
uint32_t const cDigests = pSignedData->DigestAlgorithms.cItems;
if (!cDigests) /** @todo we might have to support this... */
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_NO_DIGEST_ALGORITHMS, "No digest algorithms");
if (cDigests > RT_ELEMENTS(ahDigests))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_TOO_MANY_DIGEST_ALGORITHMS,
"Too many digest algorithm: cAlgorithms=%u", cDigests);
/* Create the message digest calculators. */
rc = VERR_CR_PKCS7_NO_DIGEST_ALGORITHMS;
uint32_t i;
for (i = 0; i < cDigests; i++)
{
rc = RTCrDigestCreateByObjId(&ahDigests[i], &pSignedData->DigestAlgorithms.paItems[i].Algorithm);
if (RT_FAILURE(rc))
{
rc = RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_CREATE_ERROR, "Error creating digest for '%s': %Rrc",
pSignedData->DigestAlgorithms.paItems[i].Algorithm.szObjId, rc);
break;
}
}
if (RT_SUCCESS(rc))
{
/* Hash the content. */
for (i = 0; i < cDigests && RT_SUCCESS(rc); i++)
{
rc = RTCrDigestUpdate(ahDigests[i], pvContent, cbContent);
if (RT_SUCCESS(rc))
rc = RTCrDigestFinal(ahDigests[i], NULL, 0);
}
if (RT_SUCCESS(rc))
{
/*
* Validate the signed infos.
*/
uint32_t fPrimaryVccFlags = !(fFlags & RTCRPKCS7VERIFY_SD_F_USAGE_TIMESTAMPING)
? RTCRPKCS7VCC_F_SIGNED_DATA : RTCRPKCS7VCC_F_TIMESTAMP;
rc = VERR_CR_PKCS7_NO_SIGNER_INFOS;
for (i = 0; i < pSignedData->SignerInfos.cItems; i++)
{
PCRTCRPKCS7SIGNERINFO pSignerInfo = &pSignedData->SignerInfos.paItems[i];
RTCRDIGEST hThisDigest = NIL_RTCRDIGEST; /* (gcc maybe incredible stupid.) */
rc = rtCrPkcs7VerifyFindDigest(&hThisDigest, pSignedData, pSignerInfo, ahDigests, pErrInfo);
if (RT_FAILURE(rc))
break;
/*
* See if we can find a trusted signing time.
* (Note that while it would make sense splitting up this function,
* we need to carry a lot of arguments around, so better not.)
*/
bool fDone = false;
PCRTCRPKCS7SIGNERINFO pSigningTimeSigner = NULL;
PCRTASN1TIME pSignedTime;
while ( !fDone
&& (pSignedTime = RTCrPkcs7SignerInfo_GetSigningTime(pSignerInfo, &pSigningTimeSigner)) != NULL)
{
RTTIMESPEC ThisValidationTime;
if (RT_LIKELY(RTTimeImplode(&ThisValidationTime, &pSignedTime->Time)))
{
if (pSigningTimeSigner == pSignerInfo)
{
if (fFlags & RTCRPKCS7VERIFY_SD_F_COUNTER_SIGNATURE_SIGNING_TIME_ONLY)
continue;
rc = rtCrPkcs7VerifySignerInfo(pSignerInfo, pSignedData, hThisDigest, fFlags,
hAdditionalCerts, hTrustedCerts, &ThisValidationTime,
pfnVerifyCert, fPrimaryVccFlags | RTCRPKCS7VCC_F_TIMESTAMP,
pvUser, pErrInfo);
}
else
{
rc = VINF_SUCCESS;
if (!(fFlags & RTCRPKCS7VERIFY_SD_F_USE_SIGNING_TIME_UNVERIFIED))
rc = rtCrPkcs7VerifyCounterSignerInfo(pSigningTimeSigner, pSignerInfo, pSignedData, fFlags,
hAdditionalCerts, hTrustedCerts, &ThisValidationTime,
pfnVerifyCert, RTCRPKCS7VCC_F_TIMESTAMP, pvUser, pErrInfo);
if (RT_SUCCESS(rc))
rc = rtCrPkcs7VerifySignerInfo(pSignerInfo, pSignedData, hThisDigest, fFlags, hAdditionalCerts,
hTrustedCerts, &ThisValidationTime,
pfnVerifyCert, fPrimaryVccFlags, pvUser, pErrInfo);
}
fDone = RT_SUCCESS(rc)
|| (fFlags & RTCRPKCS7VERIFY_SD_F_ALWAYS_USE_SIGNING_TIME_IF_PRESENT);
}
else
{
rc = RTErrInfoSet(pErrInfo, VERR_INTERNAL_ERROR_3, "RTTimeImplode failed");
fDone = true;
}
}
/*
* If not luck, check for microsoft timestamp counter signatures.
*/
if (!fDone && !(fFlags & RTCRPKCS7VERIFY_SD_F_IGNORE_MS_TIMESTAMP))
{
PCRTCRPKCS7CONTENTINFO pSignedTimestamp = NULL;
pSignedTime = RTCrPkcs7SignerInfo_GetMsTimestamp(pSignerInfo, &pSignedTimestamp);
if (pSignedTime)
{
RTTIMESPEC ThisValidationTime;
if (RT_LIKELY(RTTimeImplode(&ThisValidationTime, &pSignedTime->Time)))
{
rc = VINF_SUCCESS;
if (!(fFlags & RTCRPKCS7VERIFY_SD_F_USE_MS_TIMESTAMP_UNVERIFIED))
rc = RTCrPkcs7VerifySignedData(pSignedTimestamp,
fFlags | RTCRPKCS7VERIFY_SD_F_IGNORE_MS_TIMESTAMP
| RTCRPKCS7VERIFY_SD_F_USAGE_TIMESTAMPING,
hAdditionalCerts, hTrustedCerts, &ThisValidationTime,
pfnVerifyCert, pvUser, pErrInfo);
if (RT_SUCCESS(rc))
rc = rtCrPkcs7VerifySignerInfo(pSignerInfo, pSignedData, hThisDigest, fFlags, hAdditionalCerts,
hTrustedCerts, &ThisValidationTime,
pfnVerifyCert, fPrimaryVccFlags, pvUser, pErrInfo);
fDone = RT_SUCCESS(rc)
|| (fFlags & RTCRPKCS7VERIFY_SD_F_ALWAYS_USE_MS_TIMESTAMP_IF_PRESENT);
}
else
{
rc = RTErrInfoSet(pErrInfo, VERR_INTERNAL_ERROR_3, "RTTimeImplode failed");
fDone = true;
}
}
}
/*
* No valid signing time found, use the one specified instead.
*/
if (!fDone)
rc = rtCrPkcs7VerifySignerInfo(pSignerInfo, pSignedData, hThisDigest, fFlags, hAdditionalCerts, hTrustedCerts,
pValidationTime, pfnVerifyCert, fPrimaryVccFlags, pvUser, pErrInfo);
RTCrDigestRelease(hThisDigest);
if (RT_FAILURE(rc))
break;
}
}
else
rc = RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_CALC_ERROR,
"Hashing content failed unexpectedly (i=%u): %Rrc", i, rc);
/* Clean up digests. */
i = cDigests;
}
while (i-- > 0)
{
int rc2 = RTCrDigestRelease(ahDigests[i]);
AssertRC(rc2);
}
#ifdef IPRT_WITH_OPENSSL
/*
* Verify using OpenSSL and combine the results (should be identical).
*/
/** @todo figure out how to verify MS timstamp signatures using OpenSSL. */
if (fFlags & RTCRPKCS7VERIFY_SD_F_USAGE_TIMESTAMPING)
return rc;
int rcOssl = rtCrPkcs7VerifySignedDataUsingOpenSsl(pContentInfo, fFlags, hAdditionalCerts, hTrustedCerts,
pvContent, cbContent, RT_SUCCESS(rc) ? pErrInfo : NULL);
if (RT_SUCCESS(rcOssl) && RT_SUCCESS(rc))
return rc;
// AssertMsg(RT_FAILURE_NP(rcOssl) && RT_FAILURE_NP(rc), ("%Rrc, %Rrc\n", rcOssl, rc));
if (RT_FAILURE(rc))
return rc;
return rcOssl;
#else
return rc;
#endif
}
/**
* Deals with authenticated attributes.
*
* When authenticated attributes are present (checked by caller) we must:
* - fish out the content type and check it against the content inof,
* - fish out the message digest among and check it against *phDigest,
* - compute the message digest of the authenticated attributes and
* replace *phDigest with this for the signature verification.
*
* @returns IPRT status code.
* @param pSignerInfo The signer info being verified.
* @param pSignedData The signed data.
* @param phDigest On input this is the digest of the content. On
* output it will (on success) be a reference to
* the message digest of the authenticated
* attributes. The input reference is consumed.
* The caller shall release the output reference.
* @param fFlags Flags.
* @param pErrInfo Extended error info, optional.
*/
static int rtCrPkcs7VerifySignerInfoAuthAttribs(PCRTCRPKCS7SIGNERINFO pSignerInfo, PCRTCRPKCS7SIGNEDDATA pSignedData,
PRTCRDIGEST phDigest, uint32_t fFlags, PRTERRINFO pErrInfo)
{
/*
* Scan the attributes and validate the two required attributes
* (RFC-2315, chapter 9.2, fourth bullet). Checking that we've got exactly
* one of each of them is checked by the santiy checker function, so we'll
* just assert that it did it's job here.
*/
uint32_t cContentTypes = 0;
uint32_t cMessageDigests = 0;
uint32_t i = pSignerInfo->AuthenticatedAttributes.cItems;
while (i-- > 0)
{
PCRTCRPKCS7ATTRIBUTE pAttrib = &pSignerInfo->AuthenticatedAttributes.paItems[i];
if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_CONTENT_TYPE_OID) == 0)
{
AssertReturn(!cContentTypes, VERR_CR_PKCS7_INTERNAL_ERROR);
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OBJ_IDS, VERR_CR_PKCS7_INTERNAL_ERROR);
AssertReturn(pAttrib->uValues.pObjIds->cItems == 1, VERR_CR_PKCS7_INTERNAL_ERROR);
if ( !(fFlags & RTCRPKCS7VERIFY_SD_F_COUNTER_SIGNATURE) /* See note about microsoft below. */
&& RTAsn1ObjId_Compare(&pAttrib->uValues.pObjIds->paItems[0], &pSignedData->ContentInfo.ContentType) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_CONTENT_TYPE_ATTRIB_MISMATCH,
"Expected content-type %s, found %s",
&pAttrib->uValues.pObjIds->paItems[0], pSignedData->ContentInfo.ContentType.szObjId);
cContentTypes++;
}
else if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_MESSAGE_DIGEST_OID) == 0)
{
AssertReturn(!cMessageDigests, VERR_CR_PKCS7_INTERNAL_ERROR);
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OCTET_STRINGS, VERR_CR_PKCS7_INTERNAL_ERROR);
AssertReturn(pAttrib->uValues.pOctetStrings->cItems == 1, VERR_CR_PKCS7_INTERNAL_ERROR);
if (!RTCrDigestMatch(*phDigest,
pAttrib->uValues.pOctetStrings->paItems[0].Asn1Core.uData.pv,
pAttrib->uValues.pOctetStrings->paItems[0].Asn1Core.cb))
{
size_t cbHash = RTCrDigestGetHashSize(*phDigest);
if (cbHash != pAttrib->uValues.pOctetStrings->paItems[0].Asn1Core.cb)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MESSAGE_DIGEST_ATTRIB_MISMATCH,
"Authenticated message-digest attribute mismatch: cbHash=%#zx cbValue=%#x",
cbHash, pAttrib->uValues.pOctetStrings->paItems[0].Asn1Core.cb);
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MESSAGE_DIGEST_ATTRIB_MISMATCH,
"Authenticated message-digest attribute mismatch (cbHash=%#zx):\n"
"signed: %.*Rhxs\n"
"our: %.*Rhxs\n",
cbHash,
cbHash, pAttrib->uValues.pOctetStrings->paItems[0].Asn1Core.uData.pv,
cbHash, RTCrDigestGetHash(*phDigest));
}
cMessageDigests++;
}
}
/*
* Full error reporting here as we don't currently extensively santiy check
* counter signatures.
* Note! Microsoft includes content info in their timestamp counter signatures,
* at least for vista, despite the RFC-3852 stating counter signatures
* "MUST NOT contain a content-type".
*/
if (RT_UNLIKELY( cContentTypes != 1
&& !(fFlags & RTCRPKCS7VERIFY_SD_F_COUNTER_SIGNATURE)))
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
"Missing authenticated content-type attribute.");
if (RT_UNLIKELY(cMessageDigests != 1))
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
"Missing authenticated message-digest attribute.");
/*
* Calculate the digest of the the authenticated attributes for use in the
* signature validation.
*/
if ( pSignerInfo->DigestAlgorithm.Parameters.enmType != RTASN1TYPE_NULL
&& pSignerInfo->DigestAlgorithm.Parameters.enmType != RTASN1TYPE_NOT_PRESENT)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_DIGEST_PARAMS_NOT_IMPL, "Digest algorithm has unsupported parameters");
RTCRDIGEST hDigest;
int rc = RTCrDigestCreateByObjId(&hDigest, &pSignerInfo->DigestAlgorithm.Algorithm);
if (RT_SUCCESS(rc))
{
RTCrDigestRelease(*phDigest);
*phDigest = hDigest;
/* ASSUMES that the attributes are encoded according to DER. */
uint8_t const *pbData = (uint8_t const *)RTASN1CORE_GET_RAW_ASN1_PTR(&pSignerInfo->AuthenticatedAttributes.SetCore.Asn1Core);
uint32_t cbData = RTASN1CORE_GET_RAW_ASN1_SIZE(&pSignerInfo->AuthenticatedAttributes.SetCore.Asn1Core);
uint8_t bSetOfTag = ASN1_TAG_SET | ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_CONSTRUCTED;
rc = RTCrDigestUpdate(hDigest, &bSetOfTag, sizeof(bSetOfTag)); /* Replace the implict tag with a SET-OF tag. */
if (RT_SUCCESS(rc))
rc = RTCrDigestUpdate(hDigest, pbData + sizeof(bSetOfTag), cbData - sizeof(bSetOfTag)); /* Skip the implicit tag. */
if (RT_SUCCESS(rc))
rc = RTCrDigestFinal(hDigest, NULL, 0);
}
return rc;
}
