/*
* SecCmsSignedDataVerifySignerInfo - check the signatures.
*
* The digests were either calculated during decoding (and are stored in the
* signedData itself) or set after decoding using SecCmsSignedDataSetDigests.
*
* The verification checks if the signing cert is valid and has a trusted chain
* for the purpose specified by "policies".
*
* If trustRef is NULL the cert chain is verified and the VerificationStatus is set accordingly.
* Otherwise a SecTrust object is returned for the caller to evaluate using SecTrustEvaluate().
*/
OSStatus
SecCmsSignedDataVerifySignerInfo(SecCmsSignedDataRef sigd, int i,
SecKeychainRef keychainOrArray, CFTypeRef policies, SecTrustRef *trustRef)
{
SecCmsSignerInfoRef signerinfo;
SecCmsContentInfoRef cinfo;
SECOidData *algiddata;
CSSM_DATA_PTR contentType, digest;
OSStatus status, status2;
cinfo = &(sigd->contentInfo);
signerinfo = sigd->signerInfos[i];
/* Signature or digest level verificationStatus errors should supercede
certificate level errors, so check the digest and signature first. */
/* Find digest and contentType for signerinfo */
algiddata = SecCmsSignerInfoGetDigestAlg(signerinfo);
if (algiddata == NULL) {
return errSecInternalError; // shouldn't have happened, this is likely due to corrupted data
}
digest = SecCmsSignedDataGetDigestByAlgTag(sigd, algiddata->offset);
if(digest == NULL) {
/*
* No digests; this probably had detached content the caller has to
* deal with.
* FIXME: need some error return for this (as well as many
* other places in this library).
*/
return errSecDataNotAvailable;
}
contentType = SecCmsContentInfoGetContentTypeOID(cinfo);
/* verify signature */
CFTypeRef timeStampPolicies=SecPolicyCreateAppleTimeStampingAndRevocationPolicies(policies);
status = SecCmsSignerInfoVerifyWithPolicy(signerinfo, timeStampPolicies, digest, contentType);
CFReleaseSafe(timeStampPolicies);
/* Now verify the certificate. We do this even if the signature failed to verify so we can
return a trustRef to the caller for display purposes. */
status2 = SecCmsSignerInfoVerifyCertificate(signerinfo, keychainOrArray,
policies, trustRef);
dprintf("SecCmsSignedDataVerifySignerInfo: status %d status2 %d\n", (int) status, (int)status2);
/* The error from SecCmsSignerInfoVerify() supercedes error from SecCmsSignerInfoVerifyCertificate(). */
if (status)
return status;
return status2;
}
/*
* SecCmsSignerInfoVerify - verify the signature of a single SignerInfo
*
* Just verifies the signature. The assumption is that verification of the certificate
* is done already.
*/
OSStatus
SecCmsSignerInfoVerify(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
{
return SecCmsSignerInfoVerifyWithPolicy(signerinfo,NULL, digest,contentType);
}