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_DES_H 58 #define OPENSSL_HEADER_DES_H 59 60 #include <openssl/base.h> 61 62 #if defined(__cplusplus) 63 extern "C" { 64 #endif 65 66 67 // DES. 68 69 70 typedef struct DES_cblock_st { 71 uint8_t bytes[8]; 72 } DES_cblock; 73 74 typedef struct DES_ks { 75 uint32_t subkeys[16][2]; 76 } DES_key_schedule; 77 78 79 #define DES_KEY_SZ (sizeof(DES_cblock)) 80 #define DES_SCHEDULE_SZ (sizeof(DES_key_schedule)) 81 82 #define DES_ENCRYPT 1 83 #define DES_DECRYPT 0 84 85 #define DES_CBC_MODE 0 86 #define DES_PCBC_MODE 1 87 88 // DES_set_key performs a key schedule and initialises |schedule| with |key|. 89 OPENSSL_EXPORT void DES_set_key(const DES_cblock *key, 90 DES_key_schedule *schedule); 91 92 // DES_set_odd_parity sets the parity bits (the least-significant bits in each 93 // byte) of |key| given the other bits in each byte. 94 OPENSSL_EXPORT void DES_set_odd_parity(DES_cblock *key); 95 96 // DES_ecb_encrypt encrypts (or decrypts, if |is_encrypt| is |DES_DECRYPT|) a 97 // single DES block (8 bytes) from in to out, using the key configured in 98 // |schedule|. 99 OPENSSL_EXPORT void DES_ecb_encrypt(const DES_cblock *in, DES_cblock *out, 100 const DES_key_schedule *schedule, 101 int is_encrypt); 102 103 // DES_ncbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len| 104 // bytes from |in| to |out| with DES in CBC mode. 105 OPENSSL_EXPORT void DES_ncbc_encrypt(const uint8_t *in, uint8_t *out, 106 size_t len, 107 const DES_key_schedule *schedule, 108 DES_cblock *ivec, int enc); 109 110 // DES_ecb3_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) a single 111 // block (8 bytes) of data from |input| to |output| using 3DES. 112 OPENSSL_EXPORT void DES_ecb3_encrypt(const DES_cblock *input, 113 DES_cblock *output, 114 const DES_key_schedule *ks1, 115 const DES_key_schedule *ks2, 116 const DES_key_schedule *ks3, 117 int enc); 118 119 // DES_ede3_cbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len| 120 // bytes from |in| to |out| with 3DES in CBC mode. 3DES uses three keys, thus 121 // the function takes three different |DES_key_schedule|s. 122 OPENSSL_EXPORT void DES_ede3_cbc_encrypt(const uint8_t *in, uint8_t *out, 123 size_t len, 124 const DES_key_schedule *ks1, 125 const DES_key_schedule *ks2, 126 const DES_key_schedule *ks3, 127 DES_cblock *ivec, int enc); 128 129 // DES_ede2_cbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len| 130 // bytes from |in| to |out| with 3DES in CBC mode. With this keying option, the 131 // first and third 3DES keys are identical. Thus, this function takes only two 132 // different |DES_key_schedule|s. 133 OPENSSL_EXPORT void DES_ede2_cbc_encrypt(const uint8_t *in, uint8_t *out, 134 size_t len, 135 const DES_key_schedule *ks1, 136 const DES_key_schedule *ks2, 137 DES_cblock *ivec, int enc); 138 139 140 // Deprecated functions. 141 142 // DES_set_key_unchecked calls |DES_set_key|. 143 OPENSSL_EXPORT void DES_set_key_unchecked(const DES_cblock *key, 144 DES_key_schedule *schedule); 145 146 OPENSSL_EXPORT void DES_ede3_cfb64_encrypt(const uint8_t *in, uint8_t *out, 147 long length, DES_key_schedule *ks1, 148 DES_key_schedule *ks2, 149 DES_key_schedule *ks3, 150 DES_cblock *ivec, int *num, int enc); 151 152 OPENSSL_EXPORT void DES_ede3_cfb_encrypt(const uint8_t *in, uint8_t *out, 153 int numbits, long length, 154 DES_key_schedule *ks1, 155 DES_key_schedule *ks2, 156 DES_key_schedule *ks3, 157 DES_cblock *ivec, int enc); 158 159 160 // Private functions. 161 // 162 // These functions are only exported for use in |decrepit|. 163 164 OPENSSL_EXPORT void DES_decrypt3(uint32_t *data, const DES_key_schedule *ks1, 165 const DES_key_schedule *ks2, 166 const DES_key_schedule *ks3); 167 168 OPENSSL_EXPORT void DES_encrypt3(uint32_t *data, const DES_key_schedule *ks1, 169 const DES_key_schedule *ks2, 170 const DES_key_schedule *ks3); 171 172 173 #if defined(__cplusplus) 174 } // extern C 175 #endif 176 177 #endif // OPENSSL_HEADER_DES_H 178