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rsaenh: Validate pad byte when decrypting a block cipher.

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This commit is contained in:
Juan Lang 2007-09-11 12:44:26 -07:00 committed by Alexandre Julliard
parent 894cf6dbaf
commit f0d2766fdc
1 changed files with 10 additions and 1 deletions
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11
dlls/rsaenh/rsaenh.c
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@ -2080,7 +2080,16 @@ BOOL WINAPI RSAENH_CPDecrypt(HCRYPTPROV hProv, HCRYPTKEY hKey, HCRYPTHASH hHash,
}
memcpy(in, out, pCryptKey->dwBlockLen);
}
if (Final) *pdwDataLen -= pbData[*pdwDataLen-1];
if (Final) {
if (pbData[*pdwDataLen-1] &&
pbData[*pdwDataLen-1] <= pCryptKey->dwBlockLen &&
pbData[*pdwDataLen-1] < *pdwDataLen)
*pdwDataLen -= pbData[*pdwDataLen-1];
else {
SetLastError(NTE_BAD_DATA);
return FALSE;
}
}
} else if (GET_ALG_TYPE(pCryptKey->aiAlgid) == ALG_TYPE_STREAM) {
encrypt_stream_impl(pCryptKey->aiAlgid, &pCryptKey->context, pbData, *pdwDataLen);