1 /* 2 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef HEIMDAL_SMALLER 35 #define DES3_OLD_ENCTYPE 1 36 #endif 37 38 struct _krb5_key_data { 39 krb5_keyblock *key; 40 krb5_data *schedule; 41 }; 42 43 struct _krb5_key_usage; 44 45 struct krb5_crypto_data { 46 struct _krb5_encryption_type *et; 47 struct _krb5_key_data key; 48 int num_key_usage; 49 struct _krb5_key_usage *key_usage; 50 }; 51 52 #define CRYPTO_ETYPE(C) ((C)->et->type) 53 54 /* bits for `flags' below */ 55 #define F_KEYED 1 /* checksum is keyed */ 56 #define F_CPROOF 2 /* checksum is collision proof */ 57 #define F_DERIVED 4 /* uses derived keys */ 58 #define F_VARIANT 8 /* uses `variant' keys (6.4.3) */ 59 #define F_PSEUDO 16 /* not a real protocol type */ 60 #define F_SPECIAL 32 /* backwards */ 61 #define F_DISABLED 64 /* enctype/checksum disabled */ 62 #define F_WEAK 128 /* enctype is considered weak */ 63 64 struct salt_type { 65 krb5_salttype type; 66 const char *name; 67 krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data, 68 krb5_salt, krb5_data, krb5_keyblock*); 69 }; 70 71 struct _krb5_key_type { 72 krb5_enctype type; 73 const char *name; 74 size_t bits; 75 size_t size; 76 size_t schedule_size; 77 void (*random_key)(krb5_context, krb5_keyblock*); 78 void (*schedule)(krb5_context, struct _krb5_key_type *, struct _krb5_key_data *); 79 struct salt_type *string_to_key; 80 void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t); 81 void (*cleanup)(krb5_context, struct _krb5_key_data *); 82 const EVP_CIPHER *(*evp)(void); 83 }; 84 85 struct _krb5_checksum_type { 86 krb5_cksumtype type; 87 const char *name; 88 size_t blocksize; 89 size_t checksumsize; 90 unsigned flags; 91 krb5_error_code (*checksum)(krb5_context context, 92 struct _krb5_key_data *key, 93 const void *buf, size_t len, 94 unsigned usage, 95 Checksum *csum); 96 krb5_error_code (*verify)(krb5_context context, 97 struct _krb5_key_data *key, 98 const void *buf, size_t len, 99 unsigned usage, 100 Checksum *csum); 101 }; 102 103 struct _krb5_encryption_type { 104 krb5_enctype type; 105 const char *name; 106 size_t blocksize; 107 size_t padsize; 108 size_t confoundersize; 109 struct _krb5_key_type *keytype; 110 struct _krb5_checksum_type *checksum; 111 struct _krb5_checksum_type *keyed_checksum; 112 unsigned flags; 113 krb5_error_code (*encrypt)(krb5_context context, 114 struct _krb5_key_data *key, 115 void *data, size_t len, 116 krb5_boolean encryptp, 117 int usage, 118 void *ivec); 119 size_t prf_length; 120 krb5_error_code (*prf)(krb5_context, 121 krb5_crypto, const krb5_data *, krb5_data *); 122 }; 123 124 #define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA) 125 #define INTEGRITY_USAGE(U) (((U) << 8) | 0x55) 126 #define CHECKSUM_USAGE(U) (((U) << 8) | 0x99) 127 128 /* Checksums */ 129 130 extern struct _krb5_checksum_type _krb5_checksum_none; 131 extern struct _krb5_checksum_type _krb5_checksum_crc32; 132 extern struct _krb5_checksum_type _krb5_checksum_rsa_md4; 133 extern struct _krb5_checksum_type _krb5_checksum_rsa_md4_des; 134 extern struct _krb5_checksum_type _krb5_checksum_rsa_md5_des; 135 extern struct _krb5_checksum_type _krb5_checksum_rsa_md5_des3; 136 extern struct _krb5_checksum_type _krb5_checksum_rsa_md5; 137 extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_des3; 138 extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes128; 139 extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes256; 140 extern struct _krb5_checksum_type _krb5_checksum_hmac_md5; 141 extern struct _krb5_checksum_type _krb5_checksum_sha1; 142 143 extern struct _krb5_checksum_type *_krb5_checksum_types[]; 144 extern int _krb5_num_checksums; 145 146 /* Salts */ 147 148 extern struct salt_type _krb5_AES_salt[]; 149 extern struct salt_type _krb5_arcfour_salt[]; 150 extern struct salt_type _krb5_des_salt[]; 151 extern struct salt_type _krb5_des3_salt[]; 152 extern struct salt_type _krb5_des3_salt_derived[]; 153 154 /* Encryption types */ 155 156 extern struct _krb5_encryption_type _krb5_enctype_aes256_cts_hmac_sha1; 157 extern struct _krb5_encryption_type _krb5_enctype_aes128_cts_hmac_sha1; 158 extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_sha1; 159 extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_md5; 160 extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_none; 161 extern struct _krb5_encryption_type _krb5_enctype_arcfour_hmac_md5; 162 extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md5; 163 extern struct _krb5_encryption_type _krb5_enctype_old_des3_cbc_sha1; 164 extern struct _krb5_encryption_type _krb5_enctype_des_cbc_crc; 165 extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md4; 166 extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md5; 167 extern struct _krb5_encryption_type _krb5_enctype_des_cbc_none; 168 extern struct _krb5_encryption_type _krb5_enctype_des_cfb64_none; 169 extern struct _krb5_encryption_type _krb5_enctype_des_pcbc_none; 170 extern struct _krb5_encryption_type _krb5_enctype_null; 171 172 extern struct _krb5_encryption_type *_krb5_etypes[]; 173 extern int _krb5_num_etypes; 174 175 /* Interface to the EVP crypto layer provided by hcrypto */ 176 struct _krb5_evp_schedule { 177 EVP_CIPHER_CTX ectx; 178 EVP_CIPHER_CTX dctx; 179 }; 180