]>
Commit | Line | Data |
---|---|---|
3bfe9005 SL |
1 | /* |
2 | * Copyright 2019 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 | ||
604e884b RL |
10 | #include "prov/ciphercommon.h" |
11 | #include "prov/cipher_ccm.h" | |
3bfe9005 | 12 | |
4a42e264 SL |
13 | int ccm_generic_setiv(PROV_CCM_CTX *ctx, const unsigned char *nonce, |
14 | size_t nlen, size_t mlen) | |
3bfe9005 SL |
15 | { |
16 | return CRYPTO_ccm128_setiv(&ctx->ccm_ctx, nonce, nlen, mlen) == 0; | |
17 | } | |
18 | ||
4a42e264 | 19 | int ccm_generic_setaad(PROV_CCM_CTX *ctx, const unsigned char *aad, size_t alen) |
3bfe9005 SL |
20 | { |
21 | CRYPTO_ccm128_aad(&ctx->ccm_ctx, aad, alen); | |
22 | return 1; | |
23 | } | |
24 | ||
4a42e264 | 25 | int ccm_generic_gettag(PROV_CCM_CTX *ctx, unsigned char *tag, size_t tlen) |
3bfe9005 SL |
26 | { |
27 | return CRYPTO_ccm128_tag(&ctx->ccm_ctx, tag, tlen) > 0; | |
28 | } | |
29 | ||
4a42e264 SL |
30 | int ccm_generic_auth_encrypt(PROV_CCM_CTX *ctx, const unsigned char *in, |
31 | unsigned char *out, size_t len, | |
32 | unsigned char *tag, size_t taglen) | |
3bfe9005 SL |
33 | { |
34 | int rv; | |
35 | ||
36 | if (ctx->str != NULL) | |
37 | rv = CRYPTO_ccm128_encrypt_ccm64(&ctx->ccm_ctx, in, | |
38 | out, len, ctx->str) == 0; | |
39 | else | |
40 | rv = CRYPTO_ccm128_encrypt(&ctx->ccm_ctx, in, out, len) == 0; | |
41 | ||
42 | if (rv == 1 && tag != NULL) | |
43 | rv = (CRYPTO_ccm128_tag(&ctx->ccm_ctx, tag, taglen) > 0); | |
44 | return rv; | |
45 | } | |
46 | ||
4a42e264 SL |
47 | int ccm_generic_auth_decrypt(PROV_CCM_CTX *ctx, const unsigned char *in, |
48 | unsigned char *out, size_t len, | |
49 | unsigned char *expected_tag, size_t taglen) | |
3bfe9005 SL |
50 | { |
51 | int rv = 0; | |
52 | ||
53 | if (ctx->str != NULL) | |
54 | rv = CRYPTO_ccm128_decrypt_ccm64(&ctx->ccm_ctx, in, out, len, | |
55 | ctx->str) == 0; | |
56 | else | |
57 | rv = CRYPTO_ccm128_decrypt(&ctx->ccm_ctx, in, out, len) == 0; | |
58 | if (rv) { | |
59 | unsigned char tag[16]; | |
60 | ||
61 | if (!CRYPTO_ccm128_tag(&ctx->ccm_ctx, tag, taglen) | |
62 | || CRYPTO_memcmp(tag, expected_tag, taglen) != 0) | |
63 | rv = 0; | |
64 | } | |
65 | if (rv == 0) | |
66 | OPENSSL_cleanse(out, len); | |
67 | return rv; | |
68 | } | |
69 |