Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1 | /* ==================================================================== |
| 2 | * Copyright (c) 2008 The OpenSSL Project. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 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 |
| 14 | * distribution. |
| 15 | * |
| 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/)" |
| 20 | * |
| 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. |
| 25 | * |
| 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. |
| 29 | * |
| 30 | * 6. Redistributions of any form whatsoever must retain the following |
| 31 | * acknowledgment: |
| 32 | * "This product includes software developed by the OpenSSL Project |
| 33 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 34 | * |
| 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 | * ==================================================================== */ |
| 48 | |
| 49 | #ifndef OPENSSL_HEADER_MODES_H |
| 50 | #define OPENSSL_HEADER_MODES_H |
| 51 | |
| 52 | #include <openssl/base.h> |
| 53 | |
| 54 | #if defined(__cplusplus) |
| 55 | extern "C" { |
| 56 | #endif |
| 57 | |
| 58 | |
| 59 | /* modes.h contains functions that implement various block-cipher modes. */ |
| 60 | |
| 61 | |
| 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], |
| 64 | const void *key); |
| 65 | |
| 66 | |
| 67 | /* CTR. */ |
| 68 | |
| 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]); |
| 72 | |
| 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. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 79 | OPENSSL_EXPORT void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out, |
| 80 | size_t len, const void *key, |
| 81 | uint8_t ivec[16], |
| 82 | uint8_t ecount_buf[16], |
| 83 | unsigned int *num, block128_f block); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 84 | |
| 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 |
| 88 | * function. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 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); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 92 | |
| 93 | |
| 94 | /* GCM. */ |
| 95 | |
| 96 | typedef struct gcm128_context GCM128_CONTEXT; |
| 97 | |
| 98 | /* CRYPTO_gcm128_new allocates a fresh |GCM128_CONTEXT| and calls |
| 99 | * |CRYPTO_gcm128_init|. It returns the new context, or NULL on error. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 100 | OPENSSL_EXPORT GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 101 | |
| 102 | /* CRYPTO_gcm128_init initialises |ctx| to use |block| (typically AES) with the |
| 103 | * given key. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 104 | OPENSSL_EXPORT void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx, void *key, |
| 105 | block128_f block); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 106 | |
| 107 | /* CRYPTO_gcm128_setiv sets the IV (nonce) for |ctx|. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 108 | OPENSSL_EXPORT void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx, const uint8_t *iv, |
| 109 | size_t len); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 110 | |
| 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 |
| 113 | * zero otherwise. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 114 | OPENSSL_EXPORT int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx, const uint8_t *aad, |
| 115 | size_t len); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 116 | |
| 117 | /* CRYPTO_gcm128_encrypt encrypts |len| bytes from |in| to |out|. It returns |
| 118 | * one on success and zero otherwise. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 119 | OPENSSL_EXPORT int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx, const uint8_t *in, |
| 120 | uint8_t *out, size_t len); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 121 | |
| 122 | /* CRYPTO_gcm128_decrypt decrypts |len| bytes from |in| to |out|. It returns |
| 123 | * one on success and zero otherwise. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 124 | OPENSSL_EXPORT int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx, const uint8_t *in, |
| 125 | uint8_t *out, size_t len); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 126 | |
| 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 |
| 130 | * otherwise. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 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); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 134 | |
| 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 |
| 138 | * otherwise. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 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); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 142 | |
| 143 | /* CRYPTO_gcm128_finish calculates the authenticator and compares it against |
| 144 | * |len| bytes of |tag|. It returns one on success and zero otherwise. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 145 | OPENSSL_EXPORT int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx, const uint8_t *tag, |
| 146 | size_t len); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 147 | |
| 148 | /* CRYPTO_gcm128_tag calculates the authenticator and copies it into |tag|. The |
| 149 | * minimum of |len| and 16 bytes are copied into |tag|. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 150 | OPENSSL_EXPORT void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, uint8_t *tag, |
| 151 | size_t len); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 152 | |
| 153 | /* CRYPTO_gcm128_release clears and frees |ctx|. */ |
Adam Langley | eb7d2ed | 2014-07-30 16:02:14 -0700 | [diff] [blame] | 154 | OPENSSL_EXPORT void CRYPTO_gcm128_release(GCM128_CONTEXT *ctx); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 155 | |
| 156 | |
| 157 | /* CBC. */ |
| 158 | |
| 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); |
| 162 | |
| 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); |
| 169 | |
| 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); |
| 176 | |
| 177 | |
| 178 | /* OFB. */ |
| 179 | |
| 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 |
| 184 | * call. */ |
| 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); |
| 188 | |
| 189 | |
| 190 | /* CFB. */ |
| 191 | |
| 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, |
| 198 | block128_f block); |
| 199 | |
| 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); |
| 206 | |
| 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); |
| 213 | |
| 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], |
| 216 | block128_f block); |
| 217 | |
| 218 | |
| 219 | #if defined(__cplusplus) |
| 220 | } /* extern C */ |
| 221 | #endif |
| 222 | |
| 223 | #endif /* OPENSSL_HEADER_MODES_H */ |