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Fix ASN implementation to support both template and original modes

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- Extract hash type from PBES2 parameters in both ASN implementations
- Add proper error handling and messages
- Return ASN_PARSE_E if hash type cannot be determined
- Fix variable declarations and scoping issues

Co-Authored-By: lealem@wolfssl.com <lealem@wolfssl.com>
This commit is contained in:
Devin AI
2025-02-14 19:06:43 +00:00
parent 1c08ea4884
commit 2d25b93bac
1 changed files with 86 additions and 4 deletions
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90
wolfcrypt/src/asn.c
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@ -25782,11 +25782,93 @@ int PemToDer(const unsigned char* buff, long longSz, int type,
(!defined(NO_AES) && defined(HAVE_AES_CBC) && \
defined(HAVE_AES_DECRYPT))) && \
!defined(NO_WOLFSSL_SKIP_TRAILING_PAD)
int padVal = 0;
#endif
ret = wc_BufferKeyDecrypt(info, der->buffer, der->length,
/* Extract hash type from PBES2 parameters */
int hashType = WC_HASH_TYPE_NONE;
#ifndef WOLFSSL_ASN_TEMPLATE
{
word32 idx = 0;
word32 length;
word32 oid;
/* Get PBES2 parameters sequence */
if (GetSequence(der->buffer, &idx, &length, der->length) < 0) {
WOLFSSL_MSG("Failed to get PBES2 sequence");
ret = ASN_PARSE_E;
}
/* Get KDF algorithm identifier */
if (ret == 0 && GetAlgoId(der->buffer, &idx, &oid,
oidKdfType, der->length) < 0) {
WOLFSSL_MSG("Failed to get KDF algorithm");
ret = ASN_PARSE_E;
}
/* Get PBKDF2 parameters sequence */
if (ret == 0 && GetSequence(der->buffer, &idx, &length,
der->length) < 0) {
WOLFSSL_MSG("Failed to get PBKDF2 parameters");
ret = ASN_PARSE_E;
}
/* Skip salt and iterations */
if (ret == 0 && GetOctetString(der->buffer, &idx, &length,
der->length) < 0) {
WOLFSSL_MSG("Failed to get salt");
ret = ASN_PARSE_E;
}
idx += length;
if (ret == 0 && GetInteger(der->buffer, &idx, &length,
der->length) < 0) {
WOLFSSL_MSG("Failed to get iterations");
ret = ASN_PARSE_E;
}
/* Get PRF algorithm sequence */
if (ret == 0 && GetSequence(der->buffer, &idx, &length,
der->length) < 0) {
WOLFSSL_MSG("Failed to get PRF sequence");
ret = ASN_PARSE_E;
}
/* Get PRF algorithm OID */
if (ret == 0 && GetAlgoId(der->buffer, &idx, &oid,
oidHmacType, der->length) < 0) {
WOLFSSL_MSG("Failed to get PRF algorithm");
ret = ASN_PARSE_E;
}
if (ret == 0) {
hashType = wc_OidGetHash(oid);
if (hashType == WC_HASH_TYPE_NONE) {
WOLFSSL_MSG("Hash algorithm not supported");
ret = ASN_PARSE_E;
}
}
}
#else
{
word32 idx = 0;
DECL_ASNGETDATA(dataASN, pbes2ParamsASN_Length);
CALLOC_ASNGETDATA(dataASN, pbes2ParamsASN_Length, ret, NULL);
if (ret == 0) {
GetASN_OID(&dataASN[PBES2PARAMSASN_IDX_PBKDF2_PARAMS_PRF_OID], oidHmacType);
ret = GetASN_Items(pbes2ParamsASN, dataASN, pbes2ParamsASN_Length,
0, der->buffer, &idx, der->length);
if (ret == 0) {
hashType = wc_OidGetHash(dataASN[PBES2PARAMSASN_IDX_PBKDF2_PARAMS_PRF_OID].data.oid.sum);
if (hashType == WC_HASH_TYPE_NONE) {
WOLFSSL_MSG("Hash algorithm not supported");
ret = ASN_PARSE_E;
}
}
}
FREE_ASNGETDATA(dataASN, NULL);
}
#endif
if (ret == 0) {
ret = wc_BufferKeyDecrypt(info, der->buffer, der->length,
(byte*)password, passwordSz, hashType);
}
#ifndef WOLFSSL_ASN_TEMPLATE
word32 idx = 0;
word32 length;