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Merge pull request #3572 from dgarske/zd11381 

Fix for `wc_SetAltNamesBuffer`
pull/3575/head
toddouska 2020-12-16 15:33:12 -08:00 committed by GitHub
parent 7e1a066963 51c3f87811
commit b4fddf3f24
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 61 deletions
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65
wolfcrypt/src/asn.c
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@ -14822,67 +14822,14 @@ int wc_SetExtKeyUsageOID(Cert *cert, const char *in, word32 sz, byte idx,
static int SetAltNamesFromDcert(Cert* cert, DecodedCert* decoded) static int SetAltNamesFromDcert(Cert* cert, DecodedCert* decoded)
{ {
int ret = 0; int ret = 0;
byte tag;
if (decoded->extensions) {
int length;
word32 maxExtensionsIdx;
decoded->srcIdx = decoded->extensionsIdx;
if (GetASNTag(decoded->source, &decoded->srcIdx, &tag, decoded->maxIdx)
!= 0) {
return ASN_PARSE_E;
}
if (tag != ASN_EXTENSIONS) {
ret = ASN_PARSE_E;
}
else if (GetLength(decoded->source, &decoded->srcIdx, &length,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
}
else if (GetSequence(decoded->source, &decoded->srcIdx, &length,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
}
else {
maxExtensionsIdx = decoded->srcIdx + length;
while (decoded->srcIdx < maxExtensionsIdx) {
word32 oid;
word32 startIdx = decoded->srcIdx;
word32 tmpIdx;
if (GetSequence(decoded->source, &decoded->srcIdx, &length,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
break;
}
tmpIdx = decoded->srcIdx;
decoded->srcIdx = startIdx;
if (GetAlgoId(decoded->source, &decoded->srcIdx, &oid,
oidCertExtType, decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
break;
}
if (oid == ALT_NAMES_OID) {
cert->altNamesSz = length + (tmpIdx - startIdx);
if (cert->altNamesSz < (int)sizeof(cert->altNames))
XMEMCPY(cert->altNames, &decoded->source[startIdx],
cert->altNamesSz);
else {
cert->altNamesSz = 0; cert->altNamesSz = 0;
WOLFSSL_MSG("AltNames extensions too big"); if (decoded->altNames) {
ret = ALT_NAME_E; ret = FlattenAltNames(cert->altNames,
break; sizeof(cert->altNames), decoded->altNames);
} if (ret >= 0) {
} cert->altNamesSz = ret;
decoded->srcIdx = tmpIdx + length; ret = 0;
}
} }
} }