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fix pkcs7 memory leaks and XMALLOC result verification.

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This commit is contained in:
Moisés Guimarães
2014-06-18 14:32:20 -03:00
parent 8eae068000
commit ae073cb1f9
1 changed files with 26 additions and 5 deletions
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31
ctaocrypt/src/pkcs7.c
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@ -508,8 +508,12 @@ int PKCS7_EncodeSignedData(PKCS7* pkcs7, byte* output, word32 outputSz)
esd.outerSeqSz = SetSequence(totalSz, esd.outerSeq);
totalSz += esd.outerSeqSz;
if (outputSz < totalSz)
if (outputSz < totalSz) {
if (flatSignedAttribs)
XFREE(flatSignedAttribs, 0, NULL);
return BUFFER_E;
}
idx = 0;
XMEMCPY(output + idx, esd.outerSeq, esd.outerSeqSz);
@ -845,12 +849,16 @@ CYASSL_LOCAL int CreateRecipientInfo(const byte* cert, word32 certSz,
issuerSerialSeq);
/* KeyEncryptionAlgorithmIdentifier, only support RSA now */
if (keyEncAlgo != RSAk)
if (keyEncAlgo != RSAk) {
FreeDecodedCert(&decoded);
return ALGO_ID_E;
}
keyEncAlgSz = SetAlgoID(keyEncAlgo, keyAlgArray, keyType, 0);
if (keyEncAlgSz == 0)
if (keyEncAlgSz == 0) {
FreeDecodedCert(&decoded);
return BAD_FUNC_ARG;
}
/* EncryptedKey */
ret = InitRsaKey(&pubKey, 0);
@ -858,6 +866,7 @@ CYASSL_LOCAL int CreateRecipientInfo(const byte* cert, word32 certSz,
if (RsaPublicKeyDecode(decoded.publicKey, &idx, &pubKey,
decoded.pubKeySize) < 0) {
CYASSL_MSG("ASN RSA key decode error");
FreeDecodedCert(&decoded);
return PUBLIC_KEY_E;
}
@ -866,6 +875,7 @@ CYASSL_LOCAL int CreateRecipientInfo(const byte* cert, word32 certSz,
FreeRsaKey(&pubKey);
if (*keyEncSz < 0) {
CYASSL_MSG("RSA Public Encrypt failed");
FreeDecodedCert(&decoded);
return *keyEncSz;
}
@ -879,6 +889,7 @@ CYASSL_LOCAL int CreateRecipientInfo(const byte* cert, word32 certSz,
if (recipSeqSz + verSz + issuerSerialSeqSz + issuerSeqSz + snSz +
keyEncAlgSz + encKeyOctetStrSz + *keyEncSz > (int)outSz) {
CYASSL_MSG("RecipientInfo output buffer too small");
FreeDecodedCert(&decoded);
return BUFFER_E;
}
@ -1037,8 +1048,13 @@ int PKCS7_EncodeEnvelopedData(PKCS7* pkcs7, byte* output, word32 outputSz)
* adding (ivOctetStringSz + DES_BLOCK_SIZE) for IV OCTET STRING */
contentEncAlgoSz = SetAlgoID(pkcs7->encryptOID, contentEncAlgo,
blkType, ivOctetStringSz + DES_BLOCK_SIZE);
if (contentEncAlgoSz == 0)
if (contentEncAlgoSz == 0) {
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (dynamicFlag)
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return BAD_FUNC_ARG;
}
/* encrypt content */
if (pkcs7->encryptOID == DESb) {
@ -1324,6 +1340,8 @@ CYASSL_API int PKCS7_DecodeEnvelopedData(PKCS7* pkcs7, byte* pkiMsg,
encryptedContent = XMALLOC(encryptedContentSz, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (encryptedContent == NULL)
return MEMORY_E;
XMEMCPY(encryptedContent, &pkiMsg[idx], encryptedContentSz);
@ -1331,8 +1349,10 @@ CYASSL_API int PKCS7_DecodeEnvelopedData(PKCS7* pkcs7, byte* pkiMsg,
keySz = RsaPrivateDecryptInline(encryptedKey, encryptedKeySz,
&decryptedKey, &privKey);
FreeRsaKey(&privKey);
if (keySz <= 0)
if (keySz <= 0) {
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return keySz;
}
/* decrypt encryptedContent */
if (encOID == DESb) {
@ -1361,6 +1381,7 @@ CYASSL_API int PKCS7_DecodeEnvelopedData(PKCS7* pkcs7, byte* pkiMsg,
}
} else {
CYASSL_MSG("Unsupported content encryption OID type");
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return ALGO_ID_E;
}