/src/openssl/crypto/evp/e_chacha20_poly1305.c
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1 | | /* |
2 | | * Copyright 2015-2025 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/macros.h> |
11 | | |
12 | | #ifndef OPENSSL_NO_CHACHA |
13 | | |
14 | | #include "crypto/evp.h" |
15 | | #include "crypto/chacha.h" |
16 | | |
17 | | static const EVP_CIPHER chacha20 = { |
18 | | NID_chacha20, |
19 | | 1, /* block_size */ |
20 | | CHACHA_KEY_SIZE, /* key_len */ |
21 | | CHACHA_CTR_SIZE, /* iv_len, 128-bit counter in the context */ |
22 | | EVP_CIPH_CUSTOM_IV | EVP_CIPH_ALWAYS_CALL_INIT, |
23 | | EVP_ORIG_GLOBAL |
24 | | }; |
25 | | |
26 | | const EVP_CIPHER *EVP_chacha20(void) |
27 | 3 | { |
28 | 3 | return &chacha20; |
29 | 3 | } |
30 | | |
31 | | #ifndef OPENSSL_NO_POLY1305 |
32 | | |
33 | | static const EVP_CIPHER chacha20_poly1305 = { |
34 | | NID_chacha20_poly1305, |
35 | | 1, /* block_size */ |
36 | | CHACHA_KEY_SIZE, /* key_len */ |
37 | | 12, /* iv_len, 96-bit nonce in the context */ |
38 | | EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_CUSTOM_IV | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_CUSTOM_CIPHER | EVP_CIPH_CUSTOM_IV_LENGTH, |
39 | | EVP_ORIG_GLOBAL |
40 | | }; |
41 | | |
42 | | const EVP_CIPHER *EVP_chacha20_poly1305(void) |
43 | 3 | { |
44 | 3 | return (&chacha20_poly1305); |
45 | 3 | } |
46 | | #endif |
47 | | #else |
48 | | NON_EMPTY_TRANSLATION_UNIT |
49 | | #endif |