1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 5 * Authors: Doug Rabson <dfr@rabson.org> 6 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/_iovec.h> 31 32 #define ETYPE_NULL 0 33 #define ETYPE_DES_CBC_CRC 1 34 #define ETYPE_DES_CBC_MD4 2 35 #define ETYPE_DES_CBC_MD5 3 36 #define ETYPE_DES3_CBC_MD5 5 37 #define ETYPE_OLD_DES3_CBC_SHA1 7 38 #define ETYPE_DES3_CBC_SHA1 16 39 #define ETYPE_AES128_CTS_HMAC_SHA1_96 17 40 #define ETYPE_AES256_CTS_HMAC_SHA1_96 18 41 #define ETYPE_ARCFOUR_HMAC_MD5 23 42 #define ETYPE_ARCFOUR_HMAC_MD5_56 24 43 44 /* 45 * Key usages for des3-cbc-sha1 tokens 46 */ 47 #define KG_USAGE_SEAL 22 48 #define KG_USAGE_SIGN 23 49 #define KG_USAGE_SEQ 24 50 51 /* 52 * Key usages for RFC4121 tokens 53 */ 54 #define KG_USAGE_ACCEPTOR_SEAL 22 55 #define KG_USAGE_ACCEPTOR_SIGN 23 56 #define KG_USAGE_INITIATOR_SEAL 24 57 #define KG_USAGE_INITIATOR_SIGN 25 58 59 struct krb5_key_state; 60 61 typedef void init_func(struct krb5_key_state *ks); 62 typedef void destroy_func(struct krb5_key_state *ks); 63 typedef void set_key_func(struct krb5_key_state *ks, const void *in); 64 typedef void random_to_key_func(struct krb5_key_state *ks, const void *in); 65 typedef void encrypt_func(const struct krb5_key_state *ks, 66 struct mbuf *inout, size_t skip, size_t len, void *ivec, size_t ivlen); 67 typedef void checksum_func(const struct krb5_key_state *ks, int usage, 68 struct mbuf *inout, size_t skip, size_t inlen, size_t outlen); 69 70 struct krb5_encryption_class { 71 const char *ec_name; 72 int ec_type; 73 int ec_flags; 74 #define EC_DERIVED_KEYS 1 75 size_t ec_blocklen; 76 size_t ec_msgblocklen; 77 size_t ec_checksumlen; 78 size_t ec_keybits; /* key length in bits */ 79 size_t ec_keylen; /* size of key in memory */ 80 init_func *ec_init; 81 destroy_func *ec_destroy; 82 set_key_func *ec_set_key; 83 random_to_key_func *ec_random_to_key; 84 encrypt_func *ec_encrypt; 85 encrypt_func *ec_decrypt; 86 checksum_func *ec_checksum; 87 }; 88 89 struct krb5_key_state { 90 const struct krb5_encryption_class *ks_class; 91 volatile u_int ks_refs; 92 void *ks_key; 93 void *ks_priv; 94 }; 95 96 extern struct krb5_encryption_class krb5_aes128_encryption_class; 97 extern struct krb5_encryption_class krb5_aes256_encryption_class; 98 99 static __inline void 100 krb5_set_key(struct krb5_key_state *ks, const void *keydata) 101 { 102 103 ks->ks_class->ec_set_key(ks, keydata); 104 } 105 106 static __inline void 107 krb5_random_to_key(struct krb5_key_state *ks, const void *keydata) 108 { 109 110 ks->ks_class->ec_random_to_key(ks, keydata); 111 } 112 113 static __inline void 114 krb5_encrypt(const struct krb5_key_state *ks, struct mbuf *inout, 115 size_t skip, size_t len, void *ivec, size_t ivlen) 116 { 117 118 ks->ks_class->ec_encrypt(ks, inout, skip, len, ivec, ivlen); 119 } 120 121 static __inline void 122 krb5_decrypt(const struct krb5_key_state *ks, struct mbuf *inout, 123 size_t skip, size_t len, void *ivec, size_t ivlen) 124 { 125 126 ks->ks_class->ec_decrypt(ks, inout, skip, len, ivec, ivlen); 127 } 128 129 static __inline void 130 krb5_checksum(const struct krb5_key_state *ks, int usage, 131 struct mbuf *inout, size_t skip, size_t inlen, size_t outlen) 132 { 133 134 ks->ks_class->ec_checksum(ks, usage, inout, skip, inlen, outlen); 135 } 136 137 extern struct krb5_encryption_class * 138 krb5_find_encryption_class(int etype); 139 extern struct krb5_key_state * 140 krb5_create_key(const struct krb5_encryption_class *ec); 141 extern void krb5_free_key(struct krb5_key_state *ks); 142 extern struct krb5_key_state * 143 krb5_derive_key(struct krb5_key_state *inkey, 144 void *constant, size_t constantlen); 145 extern struct krb5_key_state * 146 krb5_get_encryption_key(struct krb5_key_state *basekey, int usage); 147 extern struct krb5_key_state * 148 krb5_get_integrity_key(struct krb5_key_state *basekey, int usage); 149 extern struct krb5_key_state * 150 krb5_get_checksum_key(struct krb5_key_state *basekey, int usage); 151