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fix OCSP signature leading zero, certdecode free on parse failure

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This commit is contained in:
toddouska 2017-02-06 14:10:38 -08:00
parent 895bf8dfbc
commit f938a75780
1 changed files with 15 additions and 3 deletions
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18
wolfcrypt/src/asn.c
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@ -9641,9 +9641,18 @@ static int DecodeBasicOcspResponse(byte* source, word32* ioIndex,
/* Obtain pointer to the start of the signature, and save the size */
if (source[idx++] == ASN_BIT_STRING)
{
int sigLength = 0;
if (GetLength(source, &idx, &sigLength, size) < 0)
int sigLength = 0;
byte b;
if (GetLength(source, &idx, &sigLength, size) <= 0)
return ASN_PARSE_E;
b = source[idx++];
if (b != 0x00) {
return ASN_EXPECT_0_E;
}
sigLength--;
resp->sigSz = sigLength;
resp->sig = source + idx;
idx += sigLength;
@ -9662,8 +9671,11 @@ static int DecodeBasicOcspResponse(byte* source, word32* ioIndex,
InitDecodedCert(&cert, resp->cert, resp->certSz, heap);
ret = ParseCertRelative(&cert, CERT_TYPE, VERIFY, cm);
if (ret < 0)
if (ret < 0) {
WOLFSSL_MSG("\tOCSP Responder certificate parsing failed");
FreeDecodedCert(&cert);
return ret;
}
ret = ConfirmSignature(resp->response, resp->responseSz,
cert.publicKey, cert.pubKeySize, cert.keyOID,