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Merge pull request #4499 from SparkiDev/dec_ku_len

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KeyUsage dcoding: Ensure data length is 1 or 2
This commit is contained in:
David Garske
2021-10-25 15:11:18 -07:00
committed by GitHub
parent 517225e135 8e6c6e7757
commit aa72f0685d
1 changed files with 3 additions and 0 deletions
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wolfcrypt/src/asn.c
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@@ -14986,6 +14986,9 @@ static int DecodeKeyUsage(const byte* input, int sz, DecodedCert* cert)
if (ret != 0) if (ret != 0)
return ret; return ret;
if (length == 0 || length > 2)
return ASN_PARSE_E;
cert->extKeyUsage = (word16)(input[idx]); cert->extKeyUsage = (word16)(input[idx]);
if (length == 2) if (length == 2)
cert->extKeyUsage |= (word16)(input[idx+1] << 8); cert->extKeyUsage |= (word16)(input[idx+1] << 8);