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Decode the key usage extension as LE not BE

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This commit is contained in:
Juliusz Sosinowicz
2023-08-21 17:31:31 +02:00
parent e85901c8e5
commit abfcda8750
1 changed files with 12 additions and 2 deletions
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14
wolfcrypt/src/asn.c
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@ -19247,14 +19247,24 @@ static int DecodeKeyUsage(const byte* input, word32 sz, DecodedCert* cert)
#else #else
ASNGetData dataASN[keyUsageASN_Length]; ASNGetData dataASN[keyUsageASN_Length];
word32 idx = 0; word32 idx = 0;
byte keyUsage[OPAQUE16_LEN];
word32 keyUsageSz = sizeof(keyUsage);
int ret;
WOLFSSL_ENTER("DecodeKeyUsage"); WOLFSSL_ENTER("DecodeKeyUsage");
/* Clear dynamic data and set where to store extended key usage. */ /* Clear dynamic data and set where to store extended key usage. */
XMEMSET(dataASN, 0, sizeof(dataASN)); XMEMSET(dataASN, 0, sizeof(dataASN));
GetASN_Int16Bit(&dataASN[KEYUSAGEASN_IDX_STR], &cert->extKeyUsage); GetASN_Buffer(&dataASN[KEYUSAGEASN_IDX_STR], keyUsage, &keyUsageSz);
/* Parse key usage. */ /* Parse key usage. */
return GetASN_Items(keyUsageASN, dataASN, keyUsageASN_Length, 0, input, ret = GetASN_Items(keyUsageASN, dataASN, keyUsageASN_Length, 0, input,
&idx, sz); &idx, sz);
if (ret == 0) {
/* Decode the bit string number as LE */
cert->extKeyUsage = (word16)(keyUsage[0]);
if (keyUsageSz == 2)
cert->extKeyUsage |= (word16)(keyUsage[1] << 8);
}
return ret;
#endif /* WOLFSSL_ASN_TEMPLATE */ #endif /* WOLFSSL_ASN_TEMPLATE */
} }