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fix for PKCS#7 SignedData RSA signature types, include hash function

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This commit is contained in:
Chris Conlon
2018-01-03 14:59:29 -07:00
parent 3f53e8d1dd
commit 34df8b98bf
1 changed files with 103 additions and 10 deletions
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113
wolfcrypt/src/pkcs7.c
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@ -619,8 +619,8 @@ static int wc_PKCS7_BuildSignedAttributes(PKCS7* pkcs7, ESD* esd,
}
/* gets correct encryption algo ID for SignedData, either RSAk or
* CTC_<hash>wECDSA, from pkcs7->publicKeyOID.
/* gets correct encryption algo ID for SignedData, either CTC_<hash>wRSA or
* CTC_<hash>wECDSA, from pkcs7->publicKeyOID and pkcs7->hashOID.
*
* pkcs7 - pointer to PKCS7 structure
* digEncAlgoId - [OUT] output int to store correct algo ID in
@ -638,8 +638,29 @@ static int wc_PKCS7_SignedDataGetEncAlgoId(PKCS7* pkcs7, int* digEncAlgoId,
if (pkcs7->publicKeyOID == RSAk) {
algoId = pkcs7->encryptOID;
algoType = oidKeyType;
algoType = oidSigType;
switch (pkcs7->hashOID) {
case SHAh:
algoId = CTC_SHAwRSA;
break;
case SHA224h:
algoId = CTC_SHA224wRSA;
break;
case SHA256h:
algoId = CTC_SHA256wRSA;
break;
case SHA384h:
algoId = CTC_SHA384wRSA;
break;
case SHA512h:
algoId = CTC_SHA512wRSA;
break;
}
} else if (pkcs7->publicKeyOID == ECDSAk) {
@ -1508,7 +1529,8 @@ static int wc_PKCS7_SignedDataVerifySignature(PKCS7* pkcs7, byte* sig,
return BAD_FUNC_ARG;
#ifdef WOLFSSL_SMALL_STACK
pkcs7Digest = (byte*)XMALLOC(MAX_PKCS7_DIGEST_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
pkcs7Digest = (byte*)XMALLOC(MAX_PKCS7_DIGEST_SZ, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (pkcs7Digest == NULL)
return MEMORY_E;
#endif
@ -1559,10 +1581,76 @@ static int wc_PKCS7_SignedDataVerifySignature(PKCS7* pkcs7, byte* sig,
}
/* set correct public key OID based on signature OID, stores in
* pkcs7->publicKeyOID and returns same value */
static int wc_PKCS7_SetPublicKeyOID(PKCS7* pkcs7, int sigOID)
{
if (pkcs7 == NULL)
return BAD_FUNC_ARG;
pkcs7->publicKeyOID = 0;
switch (sigOID) {
#ifndef NO_RSA
/* RSA signature types */
case CTC_MD2wRSA:
case CTC_MD5wRSA:
case CTC_SHAwRSA:
case CTC_SHA224wRSA:
case CTC_SHA256wRSA:
case CTC_SHA384wRSA:
case CTC_SHA512wRSA:
pkcs7->publicKeyOID = RSAk;
break;
/* if sigOID is already RSAk */
case RSAk:
pkcs7->publicKeyOID = sigOID;
break;
#endif
#ifndef NO_DSA
/* DSA signature types */
case CTC_SHAwDSA:
pkcs7->publicKeyOID = DSAk;
break;
/* if sigOID is already DSAk */
case DSAk:
pkcs7->publicKeyOID = sigOID;
break;
#endif
#ifdef HAVE_ECC
/* ECDSA signature types */
case CTC_SHAwECDSA:
case CTC_SHA224wECDSA:
case CTC_SHA256wECDSA:
case CTC_SHA384wECDSA:
case CTC_SHA512wECDSA:
pkcs7->publicKeyOID = ECDSAk;
break;
/* if sigOID is already ECDSAk */
case ECDSAk:
pkcs7->publicKeyOID = sigOID;
break;
#endif
default:
WOLFSSL_MSG("Unsupported public key algorithm");
return ASN_SIG_KEY_E;
}
return pkcs7->publicKeyOID;
}
/* Finds the certificates in the message and saves it. */
int wc_PKCS7_VerifySignedData(PKCS7* pkcs7, byte* pkiMsg, word32 pkiMsgSz)
{
word32 idx, contentType, hashOID;
word32 idx, contentType, hashOID, sigOID;
int length, version, ret;
byte* content = NULL;
byte* sig = NULL;
@ -1730,12 +1818,17 @@ int wc_PKCS7_VerifySignedData(PKCS7* pkcs7, byte* pkiMsg, word32 pkiMsgSz)
idx += length;
}
/* Get the sequence of digestEncryptionAlgorithm */
if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0)
/* Get digestEncryptionAlgorithm */
if (GetAlgoId(pkiMsg, &idx, &sigOID, oidSigType, pkiMsgSz) < 0) {
return ASN_PARSE_E;
}
/* Skip it */
idx += length;
/* store public key type based on digestEncryptionAlgorithm */
ret = wc_PKCS7_SetPublicKeyOID(pkcs7, sigOID);
if (ret <= 0) {
WOLFSSL_MSG("Failed to set public key OID from signature");
return ret;
}
/* Get the signature */
if (pkiMsg[idx] == ASN_OCTET_STRING) {