/src/openssl/providers/implementations/digests/null_prov.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright 2021 The OpenSSL Project Authors. All Rights Reserved. |
3 | | * |
4 | | * Licensed under the Apache License 2.0 (the "License"). You may not use |
5 | | * this file except in compliance with the License. You can obtain a copy |
6 | | * in the file LICENSE in the source distribution or at |
7 | | * https://www.openssl.org/source/license.html |
8 | | */ |
9 | | |
10 | | #include <openssl/crypto.h> |
11 | | #include "prov/digestcommon.h" |
12 | | #include "prov/implementations.h" |
13 | | |
14 | | typedef struct { |
15 | | unsigned char nothing; |
16 | | } NULLMD_CTX; |
17 | | |
18 | | static int null_init(NULLMD_CTX *ctx) |
19 | 0 | { |
20 | 0 | return 1; |
21 | 0 | } |
22 | | |
23 | | static int null_update(NULLMD_CTX *ctx, const void *data, size_t datalen) |
24 | 0 | { |
25 | 0 | return 1; |
26 | 0 | } |
27 | | |
28 | | static int null_final(unsigned char *md, NULLMD_CTX *ctx) |
29 | 0 | { |
30 | 0 | return 1; |
31 | 0 | } |
32 | | |
33 | | /* |
34 | | * We must override the PROV_FUNC_DIGEST_FINAL as dgstsize == 0 |
35 | | * and that would cause compilation warnings with the default implementation. |
36 | | */ |
37 | | #undef PROV_FUNC_DIGEST_FINAL |
38 | | #define PROV_FUNC_DIGEST_FINAL(name, dgstsize, fin) \ |
39 | | static OSSL_FUNC_digest_final_fn name##_internal_final; \ |
40 | | static int name##_internal_final(void *ctx, unsigned char *out, size_t *outl, \ |
41 | 0 | size_t outsz) \ |
42 | 0 | { \ |
43 | 0 | if (ossl_prov_is_running() && fin(out, ctx)) { \ |
44 | 0 | *outl = dgstsize; \ |
45 | 0 | return 1; \ |
46 | 0 | } \ |
47 | 0 | return 0; \ |
48 | 0 | } |
49 | | |
50 | | IMPLEMENT_digest_functions(nullmd, NULLMD_CTX, |
51 | | 0, 0, 0, |
52 | | null_init, null_update, null_final) |