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Fix for OCSP single response last optional part handling and restore original size arg since its required for the ASN elements.

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This commit is contained in:
David Garske
2020-10-14 14:55:18 -07:00
parent 10b1884993
commit 751f64b4aa
1 changed files with 8 additions and 4 deletions
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12
wolfcrypt/src/asn.c
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@ -16531,15 +16531,18 @@ static int GetEnumerated(const byte* input, word32* inOutIdx, int *value,
static int DecodeSingleResponse(byte* source,
word32* ioIndex, OcspResponse* resp, word32 size, CertStatus* cs)
word32* ioIndex, OcspResponse* resp, word32 size, int wrapperSz,
CertStatus* cs)
{
word32 idx = *ioIndex, oid, localIdx;
word32 idx = *ioIndex, prevIndex, oid, localIdx;
int length;
int ret;
byte tag;
WOLFSSL_ENTER("DecodeSingleResponse");
prevIndex = idx;
/* Wrapper around the Single Response */
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
@ -16616,7 +16619,7 @@ static int DecodeSingleResponse(byte* source,
/* The following items are optional. Only check for them if there is more
* unprocessed data in the singleResponse wrapper. */
localIdx = idx;
if (idx < size &&
if (((int)(idx - prevIndex) < wrapperSz) &&
GetASNTag(source, &localIdx, &tag, size) == 0 &&
tag == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0))
{
@ -16788,7 +16791,8 @@ static int DecodeResponseData(byte* source,
localIdx = idx;
cs = resp->status;
while (idx - localIdx < (word32)wrapperSz) {
if ((ret = DecodeSingleResponse(source, &idx, resp, localIdx + wrapperSz, cs)) < 0)
ret = DecodeSingleResponse(source, &idx, resp, size, wrapperSz, cs);
if (ret < 0)
return ret; /* ASN_PARSE_E, ASN_BEFORE_DATE_E, ASN_AFTER_DATE_E */
if (idx - localIdx < (word32)wrapperSz) {
cs->next = (CertStatus*)XMALLOC(sizeof(CertStatus), resp->heap,