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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/sunrpc/gss_krb5_types.h | |
3 | * | |
4 | * Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h, | |
5 | * lib/gssapi/krb5/gssapiP_krb5.h, and others | |
6 | * | |
81d4a433 | 7 | * Copyright (c) 2000-2008 The Regents of the University of Michigan. |
1da177e4 LT |
8 | * All rights reserved. |
9 | * | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * Bruce Fields <bfields@umich.edu> | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Copyright 1995 by the Massachusetts Institute of Technology. | |
16 | * All Rights Reserved. | |
17 | * | |
18 | * Export of this software from the United States of America may | |
19 | * require a specific license from the United States Government. | |
20 | * It is the responsibility of any person or organization contemplating | |
21 | * export to obtain such a license before exporting. | |
22 | * | |
23 | * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and | |
24 | * distribute this software and its documentation for any purpose and | |
25 | * without fee is hereby granted, provided that the above copyright | |
26 | * notice appear in all copies and that both that copyright notice and | |
27 | * this permission notice appear in supporting documentation, and that | |
28 | * the name of M.I.T. not be used in advertising or publicity pertaining | |
29 | * to distribution of the software without specific, written prior | |
30 | * permission. Furthermore if you modify this software you must label | |
31 | * your software as modified software and not distribute it in such a | |
32 | * fashion that it might be confused with the original M.I.T. software. | |
33 | * M.I.T. makes no representations about the suitability of | |
34 | * this software for any purpose. It is provided "as is" without express | |
35 | * or implied warranty. | |
36 | * | |
37 | */ | |
38 | ||
3b5cf20c | 39 | #include <crypto/skcipher.h> |
1da177e4 LT |
40 | #include <linux/sunrpc/auth_gss.h> |
41 | #include <linux/sunrpc/gss_err.h> | |
42 | #include <linux/sunrpc/gss_asn1.h> | |
43 | ||
4891f2d0 KC |
44 | /* Length of constant used in key derivation */ |
45 | #define GSS_KRB5_K5CLENGTH (5) | |
46 | ||
e1f6c07b KC |
47 | /* Maximum key length (in bytes) for the supported crypto algorithms*/ |
48 | #define GSS_KRB5_MAX_KEYLEN (32) | |
49 | ||
725f2865 KC |
50 | /* Maximum checksum function output for the supported crypto algorithms */ |
51 | #define GSS_KRB5_MAX_CKSUM_LEN (20) | |
52 | ||
53 | /* Maximum blocksize for the supported crypto algorithms */ | |
54 | #define GSS_KRB5_MAX_BLOCKSIZE (16) | |
55 | ||
de9c17eb KC |
56 | struct krb5_ctx; |
57 | ||
81d4a433 KC |
58 | struct gss_krb5_enctype { |
59 | const u32 etype; /* encryption (key) type */ | |
60 | const u32 ctype; /* checksum type */ | |
61 | const char *name; /* "friendly" name */ | |
62 | const char *encrypt_name; /* crypto encrypt name */ | |
63 | const char *cksum_name; /* crypto checksum name */ | |
64 | const u16 signalg; /* signing algorithm */ | |
65 | const u16 sealalg; /* sealing algorithm */ | |
66 | const u32 blocksize; /* encryption blocksize */ | |
5af46547 KC |
67 | const u32 conflen; /* confounder length |
68 | (normally the same as | |
69 | the blocksize) */ | |
81d4a433 KC |
70 | const u32 cksumlength; /* checksum length */ |
71 | const u32 keyed_cksum; /* is it a keyed cksum? */ | |
72 | const u32 keybytes; /* raw key len, in bytes */ | |
73 | const u32 keylength; /* final key len, in bytes */ | |
e9e575b8 | 74 | u32 (*encrypt) (struct crypto_sync_skcipher *tfm, |
81d4a433 KC |
75 | void *iv, void *in, void *out, |
76 | int length); /* encryption function */ | |
e9e575b8 | 77 | u32 (*decrypt) (struct crypto_sync_skcipher *tfm, |
81d4a433 KC |
78 | void *iv, void *in, void *out, |
79 | int length); /* decryption function */ | |
47d84807 | 80 | u32 (*mk_key) (const struct gss_krb5_enctype *gk5e, |
4891f2d0 KC |
81 | struct xdr_netobj *in, |
82 | struct xdr_netobj *out); /* complete key generation */ | |
de9c17eb | 83 | u32 (*encrypt_v2) (struct krb5_ctx *kctx, u32 offset, |
ec25422c | 84 | struct xdr_buf *buf, |
de9c17eb | 85 | struct page **pages); /* v2 encryption function */ |
31c9590a | 86 | u32 (*decrypt_v2) (struct krb5_ctx *kctx, u32 offset, u32 len, |
de9c17eb KC |
87 | struct xdr_buf *buf, u32 *headskip, |
88 | u32 *tailskip); /* v2 decryption function */ | |
81d4a433 KC |
89 | }; |
90 | ||
47d84807 KC |
91 | /* krb5_ctx flags definitions */ |
92 | #define KRB5_CTX_FLAG_INITIATOR 0x00000001 | |
93 | #define KRB5_CTX_FLAG_CFX 0x00000002 | |
94 | #define KRB5_CTX_FLAG_ACCEPTOR_SUBKEY 0x00000004 | |
95 | ||
1da177e4 LT |
96 | struct krb5_ctx { |
97 | int initiate; /* 1 = initiating, 0 = accepting */ | |
1ac3719a | 98 | u32 enctype; |
47d84807 | 99 | u32 flags; |
81d4a433 | 100 | const struct gss_krb5_enctype *gk5e; /* enctype-specific info */ |
e9e575b8 KC |
101 | struct crypto_sync_skcipher *enc; |
102 | struct crypto_sync_skcipher *seq; | |
103 | struct crypto_sync_skcipher *acceptor_enc; | |
104 | struct crypto_sync_skcipher *initiator_enc; | |
105 | struct crypto_sync_skcipher *acceptor_enc_aux; | |
106 | struct crypto_sync_skcipher *initiator_enc_aux; | |
fc263a91 | 107 | u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */ |
e1f6c07b | 108 | u8 cksum[GSS_KRB5_MAX_KEYLEN]; |
c3be6577 PB |
109 | atomic_t seq_send; |
110 | atomic64_t seq_send64; | |
294ec5b8 | 111 | time64_t endtime; |
1da177e4 | 112 | struct xdr_netobj mech_used; |
47d84807 KC |
113 | u8 initiator_sign[GSS_KRB5_MAX_KEYLEN]; |
114 | u8 acceptor_sign[GSS_KRB5_MAX_KEYLEN]; | |
115 | u8 initiator_seal[GSS_KRB5_MAX_KEYLEN]; | |
116 | u8 acceptor_seal[GSS_KRB5_MAX_KEYLEN]; | |
117 | u8 initiator_integ[GSS_KRB5_MAX_KEYLEN]; | |
118 | u8 acceptor_integ[GSS_KRB5_MAX_KEYLEN]; | |
1da177e4 LT |
119 | }; |
120 | ||
d00953a5 KC |
121 | /* The length of the Kerberos GSS token header */ |
122 | #define GSS_KRB5_TOK_HDR_LEN (16) | |
123 | ||
1da177e4 LT |
124 | #define KG_TOK_MIC_MSG 0x0101 |
125 | #define KG_TOK_WRAP_MSG 0x0201 | |
126 | ||
de9c17eb KC |
127 | #define KG2_TOK_INITIAL 0x0101 |
128 | #define KG2_TOK_RESPONSE 0x0202 | |
129 | #define KG2_TOK_MIC 0x0404 | |
130 | #define KG2_TOK_WRAP 0x0504 | |
131 | ||
132 | #define KG2_TOKEN_FLAG_SENTBYACCEPTOR 0x01 | |
133 | #define KG2_TOKEN_FLAG_SEALED 0x02 | |
134 | #define KG2_TOKEN_FLAG_ACCEPTORSUBKEY 0x04 | |
135 | ||
136 | #define KG2_RESP_FLAG_ERROR 0x0001 | |
137 | #define KG2_RESP_FLAG_DELEG_OK 0x0002 | |
138 | ||
1da177e4 LT |
139 | enum sgn_alg { |
140 | SGN_ALG_DES_MAC_MD5 = 0x0000, | |
141 | SGN_ALG_MD2_5 = 0x0001, | |
142 | SGN_ALG_DES_MAC = 0x0002, | |
143 | SGN_ALG_3 = 0x0003, /* not published */ | |
144 | SGN_ALG_HMAC_MD5 = 0x0011, /* microsoft w2k; no support */ | |
145 | SGN_ALG_HMAC_SHA1_DES3_KD = 0x0004 | |
146 | }; | |
147 | enum seal_alg { | |
148 | SEAL_ALG_NONE = 0xffff, | |
149 | SEAL_ALG_DES = 0x0000, | |
150 | SEAL_ALG_1 = 0x0001, /* not published */ | |
151 | SEAL_ALG_MICROSOFT_RC4 = 0x0010,/* microsoft w2k; no support */ | |
152 | SEAL_ALG_DES3KD = 0x0002 | |
153 | }; | |
154 | ||
1da177e4 LT |
155 | #define CKSUMTYPE_CRC32 0x0001 |
156 | #define CKSUMTYPE_RSA_MD4 0x0002 | |
157 | #define CKSUMTYPE_RSA_MD4_DES 0x0003 | |
158 | #define CKSUMTYPE_DESCBC 0x0004 | |
159 | #define CKSUMTYPE_RSA_MD5 0x0007 | |
160 | #define CKSUMTYPE_RSA_MD5_DES 0x0008 | |
161 | #define CKSUMTYPE_NIST_SHA 0x0009 | |
162 | #define CKSUMTYPE_HMAC_SHA1_DES3 0x000c | |
de9c17eb KC |
163 | #define CKSUMTYPE_HMAC_SHA1_96_AES128 0x000f |
164 | #define CKSUMTYPE_HMAC_SHA1_96_AES256 0x0010 | |
165 | #define CKSUMTYPE_HMAC_MD5_ARCFOUR -138 /* Microsoft md5 hmac cksumtype */ | |
1da177e4 LT |
166 | |
167 | /* from gssapi_err_krb5.h */ | |
168 | #define KG_CCACHE_NOMATCH (39756032L) | |
169 | #define KG_KEYTAB_NOMATCH (39756033L) | |
170 | #define KG_TGT_MISSING (39756034L) | |
171 | #define KG_NO_SUBKEY (39756035L) | |
172 | #define KG_CONTEXT_ESTABLISHED (39756036L) | |
173 | #define KG_BAD_SIGN_TYPE (39756037L) | |
174 | #define KG_BAD_LENGTH (39756038L) | |
175 | #define KG_CTX_INCOMPLETE (39756039L) | |
176 | #define KG_CONTEXT (39756040L) | |
177 | #define KG_CRED (39756041L) | |
178 | #define KG_ENC_DESC (39756042L) | |
179 | #define KG_BAD_SEQ (39756043L) | |
180 | #define KG_EMPTY_CCACHE (39756044L) | |
181 | #define KG_NO_CTYPES (39756045L) | |
182 | ||
183 | /* per Kerberos v5 protocol spec crypto types from the wire. | |
184 | * these get mapped to linux kernel crypto routines. | |
185 | */ | |
186 | #define ENCTYPE_NULL 0x0000 | |
187 | #define ENCTYPE_DES_CBC_CRC 0x0001 /* DES cbc mode with CRC-32 */ | |
188 | #define ENCTYPE_DES_CBC_MD4 0x0002 /* DES cbc mode with RSA-MD4 */ | |
189 | #define ENCTYPE_DES_CBC_MD5 0x0003 /* DES cbc mode with RSA-MD5 */ | |
190 | #define ENCTYPE_DES_CBC_RAW 0x0004 /* DES cbc mode raw */ | |
191 | /* XXX deprecated? */ | |
192 | #define ENCTYPE_DES3_CBC_SHA 0x0005 /* DES-3 cbc mode with NIST-SHA */ | |
193 | #define ENCTYPE_DES3_CBC_RAW 0x0006 /* DES-3 cbc mode raw */ | |
194 | #define ENCTYPE_DES_HMAC_SHA1 0x0008 | |
195 | #define ENCTYPE_DES3_CBC_SHA1 0x0010 | |
47d84807 KC |
196 | #define ENCTYPE_AES128_CTS_HMAC_SHA1_96 0x0011 |
197 | #define ENCTYPE_AES256_CTS_HMAC_SHA1_96 0x0012 | |
198 | #define ENCTYPE_ARCFOUR_HMAC 0x0017 | |
199 | #define ENCTYPE_ARCFOUR_HMAC_EXP 0x0018 | |
1da177e4 LT |
200 | #define ENCTYPE_UNKNOWN 0x01ff |
201 | ||
4891f2d0 KC |
202 | /* |
203 | * Constants used for key derivation | |
204 | */ | |
205 | /* for 3DES */ | |
206 | #define KG_USAGE_SEAL (22) | |
207 | #define KG_USAGE_SIGN (23) | |
208 | #define KG_USAGE_SEQ (24) | |
209 | ||
210 | /* from rfc3961 */ | |
211 | #define KEY_USAGE_SEED_CHECKSUM (0x99) | |
212 | #define KEY_USAGE_SEED_ENCRYPTION (0xAA) | |
213 | #define KEY_USAGE_SEED_INTEGRITY (0x55) | |
214 | ||
215 | /* from rfc4121 */ | |
216 | #define KG_USAGE_ACCEPTOR_SEAL (22) | |
217 | #define KG_USAGE_ACCEPTOR_SIGN (23) | |
218 | #define KG_USAGE_INITIATOR_SEAL (24) | |
219 | #define KG_USAGE_INITIATOR_SIGN (25) | |
220 | ||
725f2865 KC |
221 | /* |
222 | * This compile-time check verifies that we will not exceed the | |
223 | * slack space allotted by the client and server auth_gss code | |
224 | * before they call gss_wrap(). | |
225 | */ | |
226 | #define GSS_KRB5_MAX_SLACK_NEEDED \ | |
227 | (GSS_KRB5_TOK_HDR_LEN /* gss token header */ \ | |
228 | + GSS_KRB5_MAX_CKSUM_LEN /* gss token checksum */ \ | |
229 | + GSS_KRB5_MAX_BLOCKSIZE /* confounder */ \ | |
230 | + GSS_KRB5_MAX_BLOCKSIZE /* possible padding */ \ | |
231 | + GSS_KRB5_TOK_HDR_LEN /* encrypted hdr in v2 token */\ | |
232 | + GSS_KRB5_MAX_CKSUM_LEN /* encryption hmac */ \ | |
233 | + 4 + 4 /* RPC verifier */ \ | |
234 | + GSS_KRB5_TOK_HDR_LEN \ | |
235 | + GSS_KRB5_MAX_CKSUM_LEN) | |
236 | ||
e1f6c07b KC |
237 | u32 |
238 | make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen, | |
239 | struct xdr_buf *body, int body_offset, u8 *cksumkey, | |
8b237076 | 240 | unsigned int usage, struct xdr_netobj *cksumout); |
1da177e4 | 241 | |
de9c17eb KC |
242 | u32 |
243 | make_checksum_v2(struct krb5_ctx *, char *header, int hdrlen, | |
244 | struct xdr_buf *body, int body_offset, u8 *key, | |
8b237076 | 245 | unsigned int usage, struct xdr_netobj *cksum); |
de9c17eb | 246 | |
a0857d03 BF |
247 | u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
248 | struct xdr_netobj *); | |
1da177e4 | 249 | |
a0857d03 BF |
250 | u32 gss_verify_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
251 | struct xdr_netobj *); | |
1da177e4 | 252 | |
14ae162c | 253 | u32 |
00fd6e14 | 254 | gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset, |
14ae162c BF |
255 | struct xdr_buf *outbuf, struct page **pages); |
256 | ||
257 | u32 | |
31c9590a | 258 | gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset, int len, |
14ae162c BF |
259 | struct xdr_buf *buf); |
260 | ||
261 | ||
1da177e4 | 262 | u32 |
e9e575b8 | 263 | krb5_encrypt(struct crypto_sync_skcipher *key, |
1da177e4 LT |
264 | void *iv, void *in, void *out, int length); |
265 | ||
266 | u32 | |
e9e575b8 | 267 | krb5_decrypt(struct crypto_sync_skcipher *key, |
1da177e4 LT |
268 | void *iv, void *in, void *out, int length); |
269 | ||
14ae162c | 270 | int |
e9e575b8 | 271 | gss_encrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *outbuf, |
378c6697 | 272 | int offset, struct page **pages); |
14ae162c BF |
273 | |
274 | int | |
e9e575b8 | 275 | gss_decrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *inbuf, |
378c6697 | 276 | int offset); |
14ae162c | 277 | |
1da177e4 | 278 | s32 |
1dbd9029 | 279 | krb5_make_seq_num(struct krb5_ctx *kctx, |
e9e575b8 | 280 | struct crypto_sync_skcipher *key, |
1da177e4 | 281 | int direction, |
5743d65c | 282 | u32 seqnum, unsigned char *cksum, unsigned char *buf); |
1da177e4 LT |
283 | |
284 | s32 | |
1dbd9029 | 285 | krb5_get_seq_num(struct krb5_ctx *kctx, |
1da177e4 | 286 | unsigned char *cksum, |
5743d65c | 287 | unsigned char *buf, int *direction, u32 *seqnum); |
725f2865 KC |
288 | |
289 | int | |
290 | xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen); | |
4891f2d0 KC |
291 | |
292 | u32 | |
47d84807 | 293 | krb5_derive_key(const struct gss_krb5_enctype *gk5e, |
4891f2d0 KC |
294 | const struct xdr_netobj *inkey, |
295 | struct xdr_netobj *outkey, | |
1f4c86c0 TM |
296 | const struct xdr_netobj *in_constant, |
297 | gfp_t gfp_mask); | |
958142e9 KC |
298 | |
299 | u32 | |
300 | gss_krb5_des3_make_key(const struct gss_krb5_enctype *gk5e, | |
301 | struct xdr_netobj *randombits, | |
302 | struct xdr_netobj *key); | |
934a95aa KC |
303 | |
304 | u32 | |
305 | gss_krb5_aes_make_key(const struct gss_krb5_enctype *gk5e, | |
306 | struct xdr_netobj *randombits, | |
307 | struct xdr_netobj *key); | |
308 | ||
309 | u32 | |
310 | gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset, | |
ec25422c | 311 | struct xdr_buf *buf, |
934a95aa KC |
312 | struct page **pages); |
313 | ||
314 | u32 | |
31c9590a | 315 | gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset, u32 len, |
934a95aa KC |
316 | struct xdr_buf *buf, u32 *plainoffset, |
317 | u32 *plainlen); | |
318 | ||
fffdaef2 KC |
319 | int |
320 | krb5_rc4_setup_seq_key(struct krb5_ctx *kctx, | |
e9e575b8 | 321 | struct crypto_sync_skcipher *cipher, |
fffdaef2 KC |
322 | unsigned char *cksum); |
323 | ||
324 | int | |
325 | krb5_rc4_setup_enc_key(struct krb5_ctx *kctx, | |
e9e575b8 | 326 | struct crypto_sync_skcipher *cipher, |
fffdaef2 | 327 | s32 seqnum); |
934a95aa KC |
328 | void |
329 | gss_krb5_make_confounder(char *p, u32 conflen); |