1 /* ====================================================================
2 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ==================================================================== */
49 #ifndef OPENSSL_HEADER_MODES_H
50 #define OPENSSL_HEADER_MODES_H
52 #include <openssl/base.h>
54 #if defined(__cplusplus)
59 /* modes.h contains functions that implement various block-cipher modes. */
62 /* block128_f is the type of a 128-bit, block cipher. */
63 typedef void (*block128_f)(const uint8_t in[16], uint8_t out[16],
69 /* ctr128_f is the type of a function that performs CTR-mode encryption. */
70 typedef void (*ctr128_f)(const uint8_t *in, uint8_t *out, size_t blocks,
71 const void *key, const uint8_t ivec[16]);
73 /* CRYPTO_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode)
74 * |len| bytes from |in| to |out| using |block| in counter mode. There's no
75 * requirement that |len| be a multiple of any value and any partial blocks are
76 * stored in |ecount_buf| and |*num|, which must be zeroed before the initial
77 * call. The counter is a 128-bit, big-endian value in |ivec| and is
78 * incremented by this function. */
79 OPENSSL_EXPORT void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out,
80 size_t len, const void *key,
82 uint8_t ecount_buf[16],
83 unsigned int *num, block128_f block);
85 /* CRYPTO_ctr128_encrypt_ctr32 acts like |CRYPTO_ctr128_encrypt| but takes
86 * |ctr|, a function that performs CTR mode but only deals with the lower 32
87 * bits of the counter. This is useful when |ctr| can be an optimised
89 OPENSSL_EXPORT void CRYPTO_ctr128_encrypt_ctr32(
90 const uint8_t *in, uint8_t *out, size_t len, const void *key,
91 uint8_t ivec[16], uint8_t ecount_buf[16], unsigned int *num, ctr128_f ctr);
96 typedef struct gcm128_context GCM128_CONTEXT;
98 /* CRYPTO_gcm128_new allocates a fresh |GCM128_CONTEXT| and calls
99 * |CRYPTO_gcm128_init|. It returns the new context, or NULL on error. */
100 OPENSSL_EXPORT GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block);
102 /* CRYPTO_gcm128_init initialises |ctx| to use |block| (typically AES) with the
104 OPENSSL_EXPORT void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx, void *key,
107 /* CRYPTO_gcm128_setiv sets the IV (nonce) for |ctx|. */
108 OPENSSL_EXPORT void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx, const uint8_t *iv,
111 /* CRYPTO_gcm128_aad sets the authenticated data for an instance of GCM. This
112 * must be called before and data is encrypted. It returns one on success and
114 OPENSSL_EXPORT int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx, const uint8_t *aad,
117 /* CRYPTO_gcm128_encrypt encrypts |len| bytes from |in| to |out|. It returns
118 * one on success and zero otherwise. */
119 OPENSSL_EXPORT int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx, const uint8_t *in,
120 uint8_t *out, size_t len);
122 /* CRYPTO_gcm128_decrypt decrypts |len| bytes from |in| to |out|. It returns
123 * one on success and zero otherwise. */
124 OPENSSL_EXPORT int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx, const uint8_t *in,
125 uint8_t *out, size_t len);
127 /* CRYPTO_gcm128_encrypt_ctr32 encrypts |len| bytes from |in| to |out| using a
128 * CTR function that only handles the bottom 32 bits of the nonce, like
129 * |CRYPTO_ctr128_encrypt_ctr32|. It returns one on success and zero
131 OPENSSL_EXPORT int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
132 const uint8_t *in, uint8_t *out,
133 size_t len, ctr128_f stream);
135 /* CRYPTO_gcm128_decrypt_ctr32 decrypts |len| bytes from |in| to |out| using a
136 * CTR function that only handles the bottom 32 bits of the nonce, like
137 * |CRYPTO_ctr128_encrypt_ctr32|. It returns one on success and zero
139 OPENSSL_EXPORT int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
140 const uint8_t *in, uint8_t *out,
141 size_t len, ctr128_f stream);
143 /* CRYPTO_gcm128_finish calculates the authenticator and compares it against
144 * |len| bytes of |tag|. It returns one on success and zero otherwise. */
145 OPENSSL_EXPORT int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx, const uint8_t *tag,
148 /* CRYPTO_gcm128_tag calculates the authenticator and copies it into |tag|. The
149 * minimum of |len| and 16 bytes are copied into |tag|. */
150 OPENSSL_EXPORT void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, uint8_t *tag,
153 /* CRYPTO_gcm128_release clears and frees |ctx|. */
154 OPENSSL_EXPORT void CRYPTO_gcm128_release(GCM128_CONTEXT *ctx);
159 /* cbc128_f is the type of a function that performs CBC-mode encryption. */
160 typedef void (*cbc128_f)(const uint8_t *in, uint8_t *out, size_t len,
161 const void *key, uint8_t ivec[16], int enc);
163 /* CRYPTO_cbc128_encrypt encrypts |len| bytes from |in| to |out| using the
164 * given IV and block cipher in CBC mode. The input need not be a multiple of
165 * 128 bits long, but the output will round up to the nearest 128 bit multiple,
166 * zero padding the input if needed. The IV will be updated on return. */
167 void CRYPTO_cbc128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
168 const void *key, uint8_t ivec[16], block128_f block);
170 /* CRYPTO_cbc128_decrypt decrypts |len| bytes from |in| to |out| using the
171 * given IV and block cipher in CBC mode. If |len| is not a multiple of 128
172 * bits then only that many bytes will be written, but a multiple of 128 bits
173 * is always read from |in|. The IV will be updated on return. */
174 void CRYPTO_cbc128_decrypt(const uint8_t *in, uint8_t *out, size_t len,
175 const void *key, uint8_t ivec[16], block128_f block);
180 /* CRYPTO_ofb128_encrypt encrypts (or decrypts, it's the same with OFB mode)
181 * |len| bytes from |in| to |out| using |block| in OFB mode. There's no
182 * requirement that |len| be a multiple of any value and any partial blocks are
183 * stored in |ivec| and |*num|, the latter must be zero before the initial
185 void CRYPTO_ofb128_encrypt(const uint8_t *in, uint8_t *out,
186 size_t len, const void *key, uint8_t ivec[16],
187 int *num, block128_f block);
192 /* CRYPTO_cfb128_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
193 * from |in| to |out| using |block| in CFB mode. There's no requirement that
194 * |len| be a multiple of any value and any partial blocks are stored in |ivec|
195 * and |*num|, the latter must be zero before the initial call. */
196 void CRYPTO_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
197 const void *key, uint8_t ivec[16], int *num, int enc,
200 /* CRYPTO_cfb128_8_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
201 * from |in| to |out| using |block| in CFB-8 mode. Prior to the first call
202 * |num| should be set to zero. */
203 void CRYPTO_cfb128_8_encrypt(const uint8_t *in, uint8_t *out, size_t len,
204 const void *key, uint8_t ivec[16], int *num,
205 int enc, block128_f block);
207 /* CRYPTO_cfb128_1_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
208 * from |in| to |out| using |block| in CFB-1 mode. Prior to the first call
209 * |num| should be set to zero. */
210 void CRYPTO_cfb128_1_encrypt(const uint8_t *in, uint8_t *out, size_t bits,
211 const void *key, uint8_t ivec[16], int *num,
212 int enc, block128_f block);
214 size_t CRYPTO_cts128_encrypt_block(const uint8_t *in, uint8_t *out, size_t len,
215 const void *key, uint8_t ivec[16],
219 #if defined(__cplusplus)
223 #endif /* OPENSSL_HEADER_MODES_H */