RTDECL(int) RTAsn1Core_CheckSanity(PCRTASN1CORE pThis, uint32_t fFlags, PRTERRINFO pErrInfo, const char *pszErrorTag)
{
/* We can only check that it's present. */
if (!RTAsn1Core_IsPresent(pThis))
return RTErrInfoSetF(pErrInfo, VERR_ASN1_NOT_PRESENT, "%s: Missing (RTASN1CORE).", pszErrorTag);
return VINF_SUCCESS;
}
static int rtCrPkcs7SignedData_CheckSanityExtra(PCRTCRPKCS7SIGNEDDATA pSignedData, uint32_t fFlags,
PRTERRINFO pErrInfo, const char *pszErrorTag)
{
bool const fAuthenticode = RT_BOOL(fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_AUTHENTICODE);
//RTAsn1Dump(&pSignedData->SeqCore.Asn1Core, 0, 0, RTAsn1DumpStrmPrintfV, g_pStdOut);
if ( RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V1) != 0
&& RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V3) != 0
&& RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V4) != 0
&& RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V5) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNED_DATA_VERSION, "SignedData version is %llu, expected %u",
pSignedData->Version.uValue.u, RTCRPKCS7SIGNEDDATA_V1);
/*
* DigestAlgorithms.
*/
if (pSignedData->DigestAlgorithms.cItems == 0) /** @todo this might be too strict */
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_SIGNED_DATA_NO_DIGEST_ALGOS, "SignedData.DigestAlgorithms is empty");
if (pSignedData->DigestAlgorithms.cItems != 1 && fAuthenticode)
return RTErrInfoSetF(pErrInfo, VERR_CR_SPC_NOT_EXACTLY_ONE_DIGEST_ALGO,
"SignedData.DigestAlgorithms has more than one algorithm (%u)",
pSignedData->DigestAlgorithms.cItems);
if (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_ONLY_KNOWN_HASH)
for (uint32_t i = 0; i < pSignedData->DigestAlgorithms.cItems; i++)
{
if (RTCrX509AlgorithmIdentifier_QueryDigestType(&pSignedData->DigestAlgorithms.paItems[i]) == RTDIGESTTYPE_INVALID)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_UNKNOWN_DIGEST_ALGORITHM,
"SignedData.DigestAlgorithms[%i] is not known: %s",
i, pSignedData->DigestAlgorithms.paItems[i].Algorithm.szObjId);
if (pSignedData->DigestAlgorithms.paItems[i].Parameters.enmType != RTASN1TYPE_NULL)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_PARAMS_NOT_IMPL,
"SignedData.DigestAlgorithms[%i] has parameters: tag=%u",
i, pSignedData->DigestAlgorithms.paItems[i].Parameters.u.Core.uTag);
}
/*
* Certificates.
*/
if ( (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_SIGNING_CERT_PRESENT)
&& pSignedData->Certificates.cItems == 0)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_NO_CERTIFICATES,
"SignedData.Certifcates is empty, expected at least one certificate");
/*
* Crls.
*/
if (fAuthenticode && RTAsn1Core_IsPresent(&pSignedData->Crls))
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_EXPECTED_NO_CRLS,
"SignedData.Crls is not empty as expected for authenticode.");
/** @todo check Crls when they become important. */
/*
* SignerInfos.
*/
if (pSignedData->SignerInfos.cItems == 0)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_NO_SIGNER_INFOS, "SignedData.SignerInfos is empty?");
if (fAuthenticode && pSignedData->SignerInfos.cItems != 1)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_EXPECTED_ONE_SIGNER_INFO,
"SignedData.SignerInfos should have one entry for authenticode: %u",
pSignedData->SignerInfos.cItems);
for (uint32_t i = 0; i < pSignedData->SignerInfos.cItems; i++)
{
PCRTCRPKCS7SIGNERINFO pSignerInfo = &pSignedData->SignerInfos.paItems[i];
if (RTAsn1Integer_UnsignedCompareWithU32(&pSignerInfo->Version, RTCRPKCS7SIGNERINFO_V1) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_VERSION,
"SignedData.SignerInfos[%u] version is %llu, expected %u",
pSignerInfo->Version.uValue.u, RTCRPKCS7SIGNERINFO_V1);
/* IssuerAndSerialNumber. */
int rc = RTCrX509Name_CheckSanity(&pSignerInfo->IssuerAndSerialNumber.Name, 0, pErrInfo,
"SignedData.SignerInfos[#].IssuerAndSerialNumber.Name");
if (RT_FAILURE(rc))
return rc;
if (pSignerInfo->IssuerAndSerialNumber.SerialNumber.Asn1Core.cb == 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_NO_ISSUER_SERIAL_NO,
"SignedData.SignerInfos[%u].IssuerAndSerialNumber.SerialNumber is missing (zero length)", i);
PCRTCRX509CERTIFICATE pCert;
pCert = RTCrPkcs7SetOfCerts_FindX509ByIssuerAndSerialNumber(&pSignedData->Certificates,
&pSignerInfo->IssuerAndSerialNumber.Name,
&pSignerInfo->IssuerAndSerialNumber.SerialNumber);
if (!pCert && (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_SIGNING_CERT_PRESENT))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_CERT_NOT_SHIPPED,
"SignedData.SignerInfos[%u].IssuerAndSerialNumber not found in T0.Certificates", i);
/* DigestAlgorithm */
uint32_t j = 0;
while ( j < pSignedData->DigestAlgorithms.cItems
&& RTCrX509AlgorithmIdentifier_Compare(&pSignedData->DigestAlgorithms.paItems[j],
&pSignerInfo->DigestAlgorithm) != 0)
j++;
if (j >= pSignedData->DigestAlgorithms.cItems)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_ALGO_NOT_FOUND_IN_LIST,
"SignedData.SignerInfos[%u].DigestAlgorithm (%s) not found in SignedData.DigestAlgorithms",
i, pSignerInfo->DigestAlgorithm.Algorithm.szObjId);
/* Digest encryption algorithm. */
#if 0 /** @todo Unimportant: Seen timestamp signatures specifying pkcs1-Sha256WithRsaEncryption in SignerInfo and just RSA in the certificate. Figure out how to compare the two. */
if ( pCert
&& RTCrX509AlgorithmIdentifier_Compare(&pSignerInfo->DigestEncryptionAlgorithm,
&pCert->TbsCertificate.SubjectPublicKeyInfo.Algorithm) != 0)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_DIGEST_ENCRYPT_MISMATCH,
"SignedData.SignerInfos[%u].DigestEncryptionAlgorithm (%s) mismatch with certificate (%s)",
i, pSignerInfo->DigestEncryptionAlgorithm.Algorithm.szObjId,
pCert->TbsCertificate.SubjectPublicKeyInfo.Algorithm.Algorithm.szObjId);
#endif
/* Authenticated attributes we know. */
if (RTCrPkcs7Attributes_IsPresent(&pSignerInfo->AuthenticatedAttributes))
{
bool fFoundContentInfo = false;
bool fFoundMessageDigest = false;
for (j = 0; j < pSignerInfo->AuthenticatedAttributes.cItems; j++)
{
PCRTCRPKCS7ATTRIBUTE pAttrib = &pSignerInfo->AuthenticatedAttributes.paItems[j];
if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_CONTENT_TYPE_OID) == 0)
{
if (fFoundContentInfo)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
"Multiple authenticated content-type attributes.");
fFoundContentInfo = true;
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OBJ_IDS, VERR_INTERNAL_ERROR_3);
if (pAttrib->uValues.pObjIds->cItems != 1)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_BAD_CONTENT_TYPE_ATTRIB,
"Expected exactly one value for content-type attrib, found: %u",
pAttrib->uValues.pObjIds->cItems);
}
else if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_MESSAGE_DIGEST_OID) == 0)
{
if (fFoundMessageDigest)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
"Multiple authenticated message-digest attributes.");
fFoundMessageDigest = true;
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OCTET_STRINGS, VERR_INTERNAL_ERROR_3);
if (pAttrib->uValues.pOctetStrings->cItems != 1)
return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_BAD_CONTENT_TYPE_ATTRIB,
"Expected exactly one value for message-digest attrib, found: %u",
pAttrib->uValues.pOctetStrings->cItems);
}
else
AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_UNKNOWN, VERR_INTERNAL_ERROR_3);
}
if (!fFoundContentInfo)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
"Missing authenticated content-type attribute.");
if (!fFoundMessageDigest)
return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
"Missing authenticated message-digest attribute.");
}
}
return VINF_SUCCESS;
}
