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
38struct _krb5_key_data {
39    krb5_keyblock *key;
40    krb5_data *schedule;
41};
42
43struct _krb5_key_usage;
44
45struct 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
64struct 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
71struct _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
85struct _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
103struct _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
130extern struct _krb5_checksum_type _krb5_checksum_none;
131extern struct _krb5_checksum_type _krb5_checksum_crc32;
132extern struct _krb5_checksum_type _krb5_checksum_rsa_md4;
133extern struct _krb5_checksum_type _krb5_checksum_rsa_md4_des;
134extern struct _krb5_checksum_type _krb5_checksum_rsa_md5_des;
135extern struct _krb5_checksum_type _krb5_checksum_rsa_md5_des3;
136extern struct _krb5_checksum_type _krb5_checksum_rsa_md5;
137extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_des3;
138extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes128;
139extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes256;
140extern struct _krb5_checksum_type _krb5_checksum_hmac_md5;
141extern struct _krb5_checksum_type _krb5_checksum_sha1;
142
143extern struct _krb5_checksum_type *_krb5_checksum_types[];
144extern int _krb5_num_checksums;
145
146/* Salts */
147
148extern struct salt_type _krb5_AES_salt[];
149extern struct salt_type _krb5_arcfour_salt[];
150extern struct salt_type _krb5_des_salt[];
151extern struct salt_type _krb5_des3_salt[];
152extern struct salt_type _krb5_des3_salt_derived[];
153
154/* Encryption types */
155
156extern struct _krb5_encryption_type _krb5_enctype_aes256_cts_hmac_sha1;
157extern struct _krb5_encryption_type _krb5_enctype_aes128_cts_hmac_sha1;
158extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_sha1;
159extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_md5;
160extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_none;
161extern struct _krb5_encryption_type _krb5_enctype_arcfour_hmac_md5;
162extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md5;
163extern struct _krb5_encryption_type _krb5_enctype_old_des3_cbc_sha1;
164extern struct _krb5_encryption_type _krb5_enctype_des_cbc_crc;
165extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md4;
166extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md5;
167extern struct _krb5_encryption_type _krb5_enctype_des_cbc_none;
168extern struct _krb5_encryption_type _krb5_enctype_des_cfb64_none;
169extern struct _krb5_encryption_type _krb5_enctype_des_pcbc_none;
170extern struct _krb5_encryption_type _krb5_enctype_null;
171
172extern struct _krb5_encryption_type *_krb5_etypes[];
173extern int _krb5_num_etypes;
174
175/* Interface to the EVP crypto layer provided by hcrypto */
176struct _krb5_evp_schedule {
177    EVP_CIPHER_CTX ectx;
178    EVP_CIPHER_CTX dctx;
179};
180