2 * linux/include/linux/sunrpc/gss_krb5_types.h
4 * Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h,
5 * lib/gssapi/krb5/gssapiP_krb5.h, and others
7 * Copyright (c) 2000-2008 The Regents of the University of Michigan.
10 * Andy Adamson <andros@umich.edu>
11 * Bruce Fields <bfields@umich.edu>
15 * Copyright 1995 by the Massachusetts Institute of Technology.
16 * All Rights Reserved.
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.
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.
39 #include <linux/crypto.h>
40 #include <linux/sunrpc/auth_gss.h>
41 #include <linux/sunrpc/gss_err.h>
42 #include <linux/sunrpc/gss_asn1.h>
44 /* Length of constant used in key derivation */
45 #define GSS_KRB5_K5CLENGTH (5)
47 /* Maximum key length (in bytes) for the supported crypto algorithms*/
48 #define GSS_KRB5_MAX_KEYLEN (32)
50 /* Maximum checksum function output for the supported crypto algorithms */
51 #define GSS_KRB5_MAX_CKSUM_LEN (20)
53 /* Maximum blocksize for the supported crypto algorithms */
54 #define GSS_KRB5_MAX_BLOCKSIZE (16)
56 struct gss_krb5_enctype {
57 const u32 etype; /* encryption (key) type */
58 const u32 ctype; /* checksum type */
59 const char *name; /* "friendly" name */
60 const char *encrypt_name; /* crypto encrypt name */
61 const char *cksum_name; /* crypto checksum name */
62 const u16 signalg; /* signing algorithm */
63 const u16 sealalg; /* sealing algorithm */
64 const u32 blocksize; /* encryption blocksize */
65 const u32 cksumlength; /* checksum length */
66 const u32 keyed_cksum; /* is it a keyed cksum? */
67 const u32 keybytes; /* raw key len, in bytes */
68 const u32 keylength; /* final key len, in bytes */
69 u32 (*encrypt) (struct crypto_blkcipher *tfm,
70 void *iv, void *in, void *out,
71 int length); /* encryption function */
72 u32 (*decrypt) (struct crypto_blkcipher *tfm,
73 void *iv, void *in, void *out,
74 int length); /* decryption function */
75 u32 (*mk_key) (struct gss_krb5_enctype *gk5e,
76 struct xdr_netobj *in,
77 struct xdr_netobj *out); /* complete key generation */
81 int initiate; /* 1 = initiating, 0 = accepting */
83 const struct gss_krb5_enctype *gk5e; /* enctype-specific info */
84 struct crypto_blkcipher *enc;
85 struct crypto_blkcipher *seq;
86 u8 cksum[GSS_KRB5_MAX_KEYLEN];
89 struct xdr_netobj mech_used;
92 extern spinlock_t krb5_seq_lock;
94 /* The length of the Kerberos GSS token header */
95 #define GSS_KRB5_TOK_HDR_LEN (16)
97 #define KG_TOK_MIC_MSG 0x0101
98 #define KG_TOK_WRAP_MSG 0x0201
101 SGN_ALG_DES_MAC_MD5 = 0x0000,
102 SGN_ALG_MD2_5 = 0x0001,
103 SGN_ALG_DES_MAC = 0x0002,
104 SGN_ALG_3 = 0x0003, /* not published */
105 SGN_ALG_HMAC_MD5 = 0x0011, /* microsoft w2k; no support */
106 SGN_ALG_HMAC_SHA1_DES3_KD = 0x0004
109 SEAL_ALG_NONE = 0xffff,
110 SEAL_ALG_DES = 0x0000,
111 SEAL_ALG_1 = 0x0001, /* not published */
112 SEAL_ALG_MICROSOFT_RC4 = 0x0010,/* microsoft w2k; no support */
113 SEAL_ALG_DES3KD = 0x0002
116 #define CKSUMTYPE_CRC32 0x0001
117 #define CKSUMTYPE_RSA_MD4 0x0002
118 #define CKSUMTYPE_RSA_MD4_DES 0x0003
119 #define CKSUMTYPE_DESCBC 0x0004
120 #define CKSUMTYPE_RSA_MD5 0x0007
121 #define CKSUMTYPE_RSA_MD5_DES 0x0008
122 #define CKSUMTYPE_NIST_SHA 0x0009
123 #define CKSUMTYPE_HMAC_SHA1_DES3 0x000c
125 /* from gssapi_err_krb5.h */
126 #define KG_CCACHE_NOMATCH (39756032L)
127 #define KG_KEYTAB_NOMATCH (39756033L)
128 #define KG_TGT_MISSING (39756034L)
129 #define KG_NO_SUBKEY (39756035L)
130 #define KG_CONTEXT_ESTABLISHED (39756036L)
131 #define KG_BAD_SIGN_TYPE (39756037L)
132 #define KG_BAD_LENGTH (39756038L)
133 #define KG_CTX_INCOMPLETE (39756039L)
134 #define KG_CONTEXT (39756040L)
135 #define KG_CRED (39756041L)
136 #define KG_ENC_DESC (39756042L)
137 #define KG_BAD_SEQ (39756043L)
138 #define KG_EMPTY_CCACHE (39756044L)
139 #define KG_NO_CTYPES (39756045L)
141 /* per Kerberos v5 protocol spec crypto types from the wire.
142 * these get mapped to linux kernel crypto routines.
144 #define ENCTYPE_NULL 0x0000
145 #define ENCTYPE_DES_CBC_CRC 0x0001 /* DES cbc mode with CRC-32 */
146 #define ENCTYPE_DES_CBC_MD4 0x0002 /* DES cbc mode with RSA-MD4 */
147 #define ENCTYPE_DES_CBC_MD5 0x0003 /* DES cbc mode with RSA-MD5 */
148 #define ENCTYPE_DES_CBC_RAW 0x0004 /* DES cbc mode raw */
149 /* XXX deprecated? */
150 #define ENCTYPE_DES3_CBC_SHA 0x0005 /* DES-3 cbc mode with NIST-SHA */
151 #define ENCTYPE_DES3_CBC_RAW 0x0006 /* DES-3 cbc mode raw */
152 #define ENCTYPE_DES_HMAC_SHA1 0x0008
153 #define ENCTYPE_DES3_CBC_SHA1 0x0010
154 #define ENCTYPE_UNKNOWN 0x01ff
157 * Constants used for key derivation
160 #define KG_USAGE_SEAL (22)
161 #define KG_USAGE_SIGN (23)
162 #define KG_USAGE_SEQ (24)
165 #define KEY_USAGE_SEED_CHECKSUM (0x99)
166 #define KEY_USAGE_SEED_ENCRYPTION (0xAA)
167 #define KEY_USAGE_SEED_INTEGRITY (0x55)
170 #define KG_USAGE_ACCEPTOR_SEAL (22)
171 #define KG_USAGE_ACCEPTOR_SIGN (23)
172 #define KG_USAGE_INITIATOR_SEAL (24)
173 #define KG_USAGE_INITIATOR_SIGN (25)
176 * This compile-time check verifies that we will not exceed the
177 * slack space allotted by the client and server auth_gss code
178 * before they call gss_wrap().
180 #define GSS_KRB5_MAX_SLACK_NEEDED \
181 (GSS_KRB5_TOK_HDR_LEN /* gss token header */ \
182 + GSS_KRB5_MAX_CKSUM_LEN /* gss token checksum */ \
183 + GSS_KRB5_MAX_BLOCKSIZE /* confounder */ \
184 + GSS_KRB5_MAX_BLOCKSIZE /* possible padding */ \
185 + GSS_KRB5_TOK_HDR_LEN /* encrypted hdr in v2 token */\
186 + GSS_KRB5_MAX_CKSUM_LEN /* encryption hmac */ \
187 + 4 + 4 /* RPC verifier */ \
188 + GSS_KRB5_TOK_HDR_LEN \
189 + GSS_KRB5_MAX_CKSUM_LEN)
192 make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen,
193 struct xdr_buf *body, int body_offset, u8 *cksumkey,
194 struct xdr_netobj *cksumout);
196 u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *,
197 struct xdr_netobj *);
199 u32 gss_verify_mic_kerberos(struct gss_ctx *, struct xdr_buf *,
200 struct xdr_netobj *);
203 gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset,
204 struct xdr_buf *outbuf, struct page **pages);
207 gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset,
208 struct xdr_buf *buf);
212 krb5_encrypt(struct crypto_blkcipher *key,
213 void *iv, void *in, void *out, int length);
216 krb5_decrypt(struct crypto_blkcipher *key,
217 void *iv, void *in, void *out, int length);
220 gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *outbuf,
221 int offset, struct page **pages);
224 gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *inbuf,
228 krb5_make_seq_num(struct crypto_blkcipher *key,
230 u32 seqnum, unsigned char *cksum, unsigned char *buf);
233 krb5_get_seq_num(struct crypto_blkcipher *key,
234 unsigned char *cksum,
235 unsigned char *buf, int *direction, u32 *seqnum);
238 xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen);
241 krb5_derive_key(struct gss_krb5_enctype *gk5e,
242 const struct xdr_netobj *inkey,
243 struct xdr_netobj *outkey,
244 const struct xdr_netobj *in_constant);