1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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_INTERNAL_H 58 #define OPENSSL_HEADER_CIPHER_INTERNAL_H 59 60 #include <openssl/base.h> 61 62 #include <openssl/asn1t.h> 63 64 #if defined(__cplusplus) 65 extern "C" { 66 #endif 67 68 69 struct evp_cipher_st { 70 /* type contains a NID identifing the cipher. (For example, NID_rc4.) */ 71 int nid; 72 73 /* block_size contains the block size, in bytes, of the cipher, or 1 for a 74 * stream cipher. */ 75 unsigned block_size; 76 77 /* key_len contains the key size, in bytes, for the cipher. If the cipher 78 * takes a variable key size then this contains the default size. */ 79 unsigned key_len; 80 81 /* iv_len contains the IV size, in bytes, or zero if inapplicable. */ 82 unsigned iv_len; 83 84 /* ctx_size contains the size, in bytes, of the per-key context for this 85 * cipher. */ 86 unsigned ctx_size; 87 88 /* flags contains the OR of a number of flags. See |EVP_CIPH_*|. */ 89 uint32_t flags; 90 91 /* app_data is a pointer to opaque, user data. */ 92 void *app_data; 93 94 int (*init)(EVP_CIPHER_CTX *ctx, const uint8_t *key, const uint8_t *iv, 95 int enc); 96 97 int (*cipher)(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in, 98 size_t inl); 99 100 int (*cleanup)(EVP_CIPHER_CTX *); 101 102 int (*ctrl)(EVP_CIPHER_CTX *, int type, int arg, void *ptr); 103 }; 104 105 /* EVP_CIPH_MODE_MASK contains the bits of |flags| that represent the mode. */ 106 #define EVP_CIPH_MODE_MASK 0x3f 107 108 109 struct evp_aead_ctx_st; 110 111 /* EVP_AEAD represents a specific AEAD algorithm. */ 112 struct evp_aead_st { 113 uint8_t key_len; 114 uint8_t nonce_len; 115 uint8_t overhead; 116 uint8_t max_tag_len; 117 118 int (*init)(struct evp_aead_ctx_st *, const uint8_t *key, 119 size_t key_len, size_t tag_len); 120 void (*cleanup)(struct evp_aead_ctx_st *); 121 122 int (*seal)(const struct evp_aead_ctx_st *ctx, uint8_t *out, 123 size_t *out_len, size_t max_out_len, const uint8_t *nonce, 124 size_t nonce_len, const uint8_t *in, size_t in_len, 125 const uint8_t *ad, size_t ad_len); 126 127 int (*open)(const struct evp_aead_ctx_st *ctx, uint8_t *out, 128 size_t *out_len, size_t max_out_len, const uint8_t *nonce, 129 size_t nonce_len, const uint8_t *in, size_t in_len, 130 const uint8_t *ad, size_t ad_len); 131 }; 132 133 #if defined(__cplusplus) 134 } /* extern C */ 135 #endif 136 137 #endif /* OPENSSL_HEADER_CIPHER_INTERNAL_H */ 138
