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bcrypt: Implement BCryptDecrypt for AES GCM mode. 

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Michael Müller 2018-03-20 20:27:08 +00:00 committed by Alexandre Julliard
parent 7c9291ce07
commit 8d2b1d276d
2 changed files with 27 additions and 9 deletions
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28
dlls/bcrypt/bcrypt_main.c
View File

@ -1361,17 +1361,35 @@ NTSTATUS WINAPI BCryptDecrypt( BCRYPT_KEY_HANDLE handle, UCHAR *input, ULONG inp
padding, iv, iv_len, output, output_len, ret_len, flags );
if (!key || key->hdr.magic != MAGIC_KEY) return STATUS_INVALID_HANDLE;
if (padding)
{
FIXME( "padding info not implemented\n" );
return STATUS_NOT_IMPLEMENTED;
}
if (flags & ~BCRYPT_BLOCK_PADDING)
{
FIXME( "flags %08x not supported\n", flags );
return STATUS_NOT_IMPLEMENTED;
}
if (key->mode == MODE_ID_GCM)
{
BCRYPT_AUTHENTICATED_CIPHER_MODE_INFO *auth_info = padding;
if (!auth_info) return STATUS_INVALID_PARAMETER;
if (!auth_info->pbNonce) return STATUS_INVALID_PARAMETER;
if (!auth_info->pbTag) return STATUS_INVALID_PARAMETER;
if (auth_info->cbTag < 12 || auth_info->cbTag > 16) return STATUS_INVALID_PARAMETER;
if ((status = key_set_params( key, auth_info->pbNonce, auth_info->cbNonce )))
return status;
*ret_len = input_len;
if (flags & BCRYPT_BLOCK_PADDING) return STATUS_INVALID_PARAMETER;
if (!output) return STATUS_SUCCESS;
if (output_len < *ret_len) return STATUS_BUFFER_TOO_SMALL;
if ((status = key_decrypt( key, input, input_len, output, output_len )))
return status;
return STATUS_SUCCESS;
}
if ((status = key_set_params( key, iv, iv_len ))) return status;
*ret_len = input_len;

8
dlls/bcrypt/tests/bcrypt.c
View File

@ -969,16 +969,16 @@ static void test_BCryptDecrypt(void)
memcpy(ivbuf, iv, sizeof(iv));
memset(plaintext, 0, sizeof(plaintext));
ret = pBCryptDecrypt(key, ciphertext4, 32, &auth_info, ivbuf, 16, plaintext, 32, &size, 0);
todo_wine ok(ret == STATUS_SUCCESS, "got %08x\n", ret);
todo_wine ok(size == 32, "got %u\n", size);
todo_wine ok(!memcmp(plaintext, expected3, sizeof(expected3)), "wrong data\n");
ok(ret == STATUS_SUCCESS, "got %08x\n", ret);
ok(size == 32, "got %u\n", size);
ok(!memcmp(plaintext, expected3, sizeof(expected3)), "wrong data\n");
/* test with wrong tag */
memcpy(ivbuf, iv, sizeof(iv));
auth_info.pbTag = iv; /* wrong tag */
ret = pBCryptDecrypt(key, ciphertext4, 32, &auth_info, ivbuf, 16, plaintext, 32, &size, 0);
todo_wine ok(ret == STATUS_AUTH_TAG_MISMATCH, "got %08x\n", ret);
todo_wine ok(size == 32, "got %u\n", size);
ok(size == 32, "got %u\n", size);
ret = pBCryptDestroyKey(key);
ok(ret == STATUS_SUCCESS, "got %08x\n", ret);