1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#ifndef OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H
58#define OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H
59
60#include <assert.h>
61#include <stdlib.h>
62
63#include <openssl/base.h>
64
65#include "../internal.h"
66
67#if defined(__cplusplus)
68extern "C" {
69#endif
70
71
72// EVP_tls_cbc_get_padding determines the padding from the decrypted, TLS, CBC
73// record in |in|. This decrypted record should not include any "decrypted"
74// explicit IV. If the record is publicly invalid, it returns zero. Otherwise,
75// it returns one and sets |*out_padding_ok| to all ones (0xfff..f) if the
76// padding is valid and zero otherwise. It then sets |*out_len| to the length
77// with the padding removed or |in_len| if invalid.
78//
79// If the function returns one, it runs in time independent of the contents of
80// |in|. It is also guaranteed that |*out_len| >= |mac_size|, satisfying
81// |EVP_tls_cbc_copy_mac|'s precondition.
82int EVP_tls_cbc_remove_padding(crypto_word_t *out_padding_ok, size_t *out_len,
83 const uint8_t *in, size_t in_len,
84 size_t block_size, size_t mac_size);
85
86// EVP_tls_cbc_copy_mac copies |md_size| bytes from the end of the first
87// |in_len| bytes of |in| to |out| in constant time (independent of the concrete
88// value of |in_len|, which may vary within a 256-byte window). |in| must point
89// to a buffer of |orig_len| bytes.
90//
91// On entry:
92// orig_len >= in_len >= md_size
93// md_size <= EVP_MAX_MD_SIZE
94void EVP_tls_cbc_copy_mac(uint8_t *out, size_t md_size, const uint8_t *in,
95 size_t in_len, size_t orig_len);
96
97// EVP_tls_cbc_record_digest_supported returns 1 iff |md| is a hash function
98// which EVP_tls_cbc_digest_record supports.
99int EVP_tls_cbc_record_digest_supported(const EVP_MD *md);
100
101// EVP_sha1_final_with_secret_suffix computes the result of hashing |len| bytes
102// from |in| to |ctx| and writes the resulting hash to |out|. |len| is treated
103// as secret and must be at most |max_len|, which is treated as public. |in|
104// must point to a buffer of at least |max_len| bytes. It returns one on success
105// and zero if inputs are too long.
106//
107// This function is exported for unit tests.
108OPENSSL_EXPORT int EVP_sha1_final_with_secret_suffix(
109 SHA_CTX *ctx, uint8_t out[SHA_DIGEST_LENGTH], const uint8_t *in, size_t len,
110 size_t max_len);
111
112// EVP_tls_cbc_digest_record computes the MAC of a decrypted, padded TLS
113// record.
114//
115// md: the hash function used in the HMAC.
116// EVP_tls_cbc_record_digest_supported must return true for this hash.
117// md_out: the digest output. At most EVP_MAX_MD_SIZE bytes will be written.
118// md_out_size: the number of output bytes is written here.
119// header: the 13-byte, TLS record header.
120// data: the record data itself
121// data_size: the secret, reported length of the data once the padding and MAC
122// have been removed.
123// data_plus_mac_plus_padding_size: the public length of the whole
124// record, including padding.
125//
126// On entry: by virtue of having been through one of the remove_padding
127// functions, above, we know that data_plus_mac_size is large enough to contain
128// a padding byte and MAC. (If the padding was invalid, it might contain the
129// padding too. )
130int EVP_tls_cbc_digest_record(const EVP_MD *md, uint8_t *md_out,
131 size_t *md_out_size, const uint8_t header[13],
132 const uint8_t *data, size_t data_size,
133 size_t data_plus_mac_plus_padding_size,
134 const uint8_t *mac_secret,
135 unsigned mac_secret_length);
136
137#define POLY1305_TAG_LEN 16
138
139// For convenience (the x86_64 calling convention allows only six parameters in
140// registers), the final parameter for the assembly functions is both an input
141// and output parameter.
142union chacha20_poly1305_open_data {
143 struct {
144 alignas(16) uint8_t key[32];
145 uint32_t counter;
146 uint8_t nonce[12];
147 } in;
148 struct {
149 uint8_t tag[POLY1305_TAG_LEN];
150 } out;
151};
152
153union chacha20_poly1305_seal_data {
154 struct {
155 alignas(16) uint8_t key[32];
156 uint32_t counter;
157 uint8_t nonce[12];
158 const uint8_t *extra_ciphertext;
159 size_t extra_ciphertext_len;
160 } in;
161 struct {
162 uint8_t tag[POLY1305_TAG_LEN];
163 } out;
164};
165
166#if (defined(OPENSSL_X86_64) || defined(OPENSSL_AARCH64)) && \
167 !defined(OPENSSL_NO_ASM)
168
169static_assert(sizeof(union chacha20_poly1305_open_data) == 48,
170 "wrong chacha20_poly1305_open_data size");
171static_assert(sizeof(union chacha20_poly1305_seal_data) == 48 + 8 + 8,
172 "wrong chacha20_poly1305_seal_data size");
173
174OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) {
175#if defined(OPENSSL_X86_64)
176 return CRYPTO_is_SSE4_1_capable();
177#elif defined(OPENSSL_AARCH64)
178 return CRYPTO_is_NEON_capable();
179#endif
180}
181
182// chacha20_poly1305_open is defined in chacha20_poly1305_*.pl. It decrypts
183// |plaintext_len| bytes from |ciphertext| and writes them to |out_plaintext|.
184// Additional input parameters are passed in |aead_data->in|. On exit, it will
185// write calculated tag value to |aead_data->out.tag|, which the caller must
186// check.
187extern void chacha20_poly1305_open(uint8_t *out_plaintext,
188 const uint8_t *ciphertext,
189 size_t plaintext_len, const uint8_t *ad,
190 size_t ad_len,
191 union chacha20_poly1305_open_data *data);
192
193// chacha20_poly1305_open is defined in chacha20_poly1305_*.pl. It encrypts
194// |plaintext_len| bytes from |plaintext| and writes them to |out_ciphertext|.
195// Additional input parameters are passed in |aead_data->in|. The calculated tag
196// value is over the computed ciphertext concatenated with |extra_ciphertext|
197// and written to |aead_data->out.tag|.
198extern void chacha20_poly1305_seal(uint8_t *out_ciphertext,
199 const uint8_t *plaintext,
200 size_t plaintext_len, const uint8_t *ad,
201 size_t ad_len,
202 union chacha20_poly1305_seal_data *data);
203#else
204
205OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) { return 0; }
206
207OPENSSL_INLINE void chacha20_poly1305_open(uint8_t *out_plaintext,
208 const uint8_t *ciphertext,
209 size_t plaintext_len, const uint8_t *ad,
210 size_t ad_len,
211 union chacha20_poly1305_open_data *data) {
212 abort();
213}
214
215OPENSSL_INLINE void chacha20_poly1305_seal(uint8_t *out_ciphertext,
216 const uint8_t *plaintext,
217 size_t plaintext_len, const uint8_t *ad,
218 size_t ad_len,
219 union chacha20_poly1305_seal_data *data) {
220 abort();
221}
222#endif
223
224
225#if defined(__cplusplus)
226} // extern C
227#endif
228
229#endif // OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H
230

source code of dart_sdk/third_party/boringssl/src/crypto/cipher_extra/internal.h