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[emu,scard] use EVP_PKEY_decrypt to determine length

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akallabeth 2023-04-27 16:30:04 +02:00 committed by Martin Fleisz
parent 8b6d05f90f
commit 60f36ed2d6
1 changed files with 10 additions and 1 deletions
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11
libfreerdp/emu/scard/smartcard_virtual_gids.c
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@ -1162,7 +1162,15 @@ static BOOL vgids_perform_decrypt(vgidsContext* context)
/* Determine buffer length */
const size_t inlen = Stream_Length(context->commandData);
size_t outlen = inlen * 2;
size_t outlen = 0;
res = EVP_PKEY_decrypt(ctx, NULL, &outlen, Stream_Buffer(context->commandData), inlen);
if (res < 0)
{
WLog_ERR(TAG, "Failed to decrypt data");
goto decrypt_failed;
}
/* Prepare output buffer */
context->responseData = Stream_New(NULL, outlen);
if (!context->responseData)
{
@ -1170,6 +1178,7 @@ static BOOL vgids_perform_decrypt(vgidsContext* context)
goto decrypt_failed;
}
/* Decrypt */
res = EVP_PKEY_decrypt(ctx, Stream_Buffer(context->responseData), &outlen,
Stream_Buffer(context->commandData), inlen);