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check attrib->value and attrib->valueSz before use

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This commit is contained in:
Chris Conlon
2019-08-27 14:18:23 -06:00
parent 61d01ab7f3
commit e6252a94ce
1 changed files with 3 additions and 0 deletions
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3
wolfcrypt/src/pkcs7.c
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@ -3447,6 +3447,9 @@ static int wc_PKCS7_VerifyContentMessageDigest(PKCS7* pkcs7,
}
/* advance past attrib->value ASN.1 header and length */
if (attrib->value == NULL || attrib->valueSz == 0)
return ASN_PARSE_E;
if (attrib->value[idx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;