Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Kevin Coffman | 81d4a43 | 2010-03-17 13:02:51 -0400 | [diff] [blame] | 7 | * Copyright (c) 2000-2008 The Regents of the University of Michigan. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Kevin Coffman | 81d4a43 | 2010-03-17 13:02:51 -0400 | [diff] [blame] | 39 | #include <linux/crypto.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/sunrpc/auth_gss.h> |
| 41 | #include <linux/sunrpc/gss_err.h> |
| 42 | #include <linux/sunrpc/gss_asn1.h> |
| 43 | |
Kevin Coffman | 4891f2d | 2010-03-17 13:02:53 -0400 | [diff] [blame^] | 44 | /* Length of constant used in key derivation */ |
| 45 | #define GSS_KRB5_K5CLENGTH (5) |
| 46 | |
Kevin Coffman | e1f6c07 | 2010-03-17 13:02:52 -0400 | [diff] [blame] | 47 | /* Maximum key length (in bytes) for the supported crypto algorithms*/ |
| 48 | #define GSS_KRB5_MAX_KEYLEN (32) |
| 49 | |
Kevin Coffman | 725f286 | 2010-03-17 13:02:46 -0400 | [diff] [blame] | 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 | |
Kevin Coffman | 81d4a43 | 2010-03-17 13:02:51 -0400 | [diff] [blame] | 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 */ |
Kevin Coffman | 4891f2d | 2010-03-17 13:02:53 -0400 | [diff] [blame^] | 75 | u32 (*mk_key) (struct gss_krb5_enctype *gk5e, |
| 76 | struct xdr_netobj *in, |
| 77 | struct xdr_netobj *out); /* complete key generation */ |
Kevin Coffman | 81d4a43 | 2010-03-17 13:02:51 -0400 | [diff] [blame] | 78 | }; |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | struct krb5_ctx { |
| 81 | int initiate; /* 1 = initiating, 0 = accepting */ |
Kevin Coffman | 1ac3719 | 2010-03-17 13:02:49 -0400 | [diff] [blame] | 82 | u32 enctype; |
Kevin Coffman | 81d4a43 | 2010-03-17 13:02:51 -0400 | [diff] [blame] | 83 | const struct gss_krb5_enctype *gk5e; /* enctype-specific info */ |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 84 | struct crypto_blkcipher *enc; |
| 85 | struct crypto_blkcipher *seq; |
Kevin Coffman | e1f6c07 | 2010-03-17 13:02:52 -0400 | [diff] [blame] | 86 | u8 cksum[GSS_KRB5_MAX_KEYLEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | s32 endtime; |
| 88 | u32 seq_send; |
| 89 | struct xdr_netobj mech_used; |
| 90 | }; |
| 91 | |
J. Bruce Fields | eaa82ed | 2006-03-20 23:24:04 -0500 | [diff] [blame] | 92 | extern spinlock_t krb5_seq_lock; |
| 93 | |
Kevin Coffman | d00953a | 2008-04-30 12:45:53 -0400 | [diff] [blame] | 94 | /* The length of the Kerberos GSS token header */ |
| 95 | #define GSS_KRB5_TOK_HDR_LEN (16) |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | #define KG_TOK_MIC_MSG 0x0101 |
| 98 | #define KG_TOK_WRAP_MSG 0x0201 |
| 99 | |
| 100 | enum sgn_alg { |
| 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 |
| 107 | }; |
| 108 | enum seal_alg { |
| 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 |
| 114 | }; |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
| 124 | |
| 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) |
| 140 | |
| 141 | /* per Kerberos v5 protocol spec crypto types from the wire. |
| 142 | * these get mapped to linux kernel crypto routines. |
| 143 | */ |
| 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 |
| 155 | |
Kevin Coffman | 725f286 | 2010-03-17 13:02:46 -0400 | [diff] [blame] | 156 | /* |
Kevin Coffman | 4891f2d | 2010-03-17 13:02:53 -0400 | [diff] [blame^] | 157 | * Constants used for key derivation |
| 158 | */ |
| 159 | /* for 3DES */ |
| 160 | #define KG_USAGE_SEAL (22) |
| 161 | #define KG_USAGE_SIGN (23) |
| 162 | #define KG_USAGE_SEQ (24) |
| 163 | |
| 164 | /* from rfc3961 */ |
| 165 | #define KEY_USAGE_SEED_CHECKSUM (0x99) |
| 166 | #define KEY_USAGE_SEED_ENCRYPTION (0xAA) |
| 167 | #define KEY_USAGE_SEED_INTEGRITY (0x55) |
| 168 | |
| 169 | /* from rfc4121 */ |
| 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) |
| 174 | |
| 175 | /* |
Kevin Coffman | 725f286 | 2010-03-17 13:02:46 -0400 | [diff] [blame] | 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(). |
| 179 | */ |
| 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) |
| 190 | |
Kevin Coffman | e1f6c07 | 2010-03-17 13:02:52 -0400 | [diff] [blame] | 191 | u32 |
| 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
J. Bruce Fields | a0857d0 | 2005-10-13 16:55:23 -0400 | [diff] [blame] | 196 | u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
| 197 | struct xdr_netobj *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
J. Bruce Fields | a0857d0 | 2005-10-13 16:55:23 -0400 | [diff] [blame] | 199 | u32 gss_verify_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
| 200 | struct xdr_netobj *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | u32 |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 203 | gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset, |
J. Bruce Fields | 14ae162 | 2005-10-13 16:55:13 -0400 | [diff] [blame] | 204 | struct xdr_buf *outbuf, struct page **pages); |
| 205 | |
| 206 | u32 |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 207 | gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset, |
J. Bruce Fields | 14ae162 | 2005-10-13 16:55:13 -0400 | [diff] [blame] | 208 | struct xdr_buf *buf); |
| 209 | |
| 210 | |
| 211 | u32 |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 212 | krb5_encrypt(struct crypto_blkcipher *key, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | void *iv, void *in, void *out, int length); |
| 214 | |
| 215 | u32 |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 216 | krb5_decrypt(struct crypto_blkcipher *key, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | void *iv, void *in, void *out, int length); |
| 218 | |
J. Bruce Fields | 14ae162 | 2005-10-13 16:55:13 -0400 | [diff] [blame] | 219 | int |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 220 | gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *outbuf, |
| 221 | int offset, struct page **pages); |
J. Bruce Fields | 14ae162 | 2005-10-13 16:55:13 -0400 | [diff] [blame] | 222 | |
| 223 | int |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 224 | gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *inbuf, |
| 225 | int offset); |
J. Bruce Fields | 14ae162 | 2005-10-13 16:55:13 -0400 | [diff] [blame] | 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | s32 |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 228 | krb5_make_seq_num(struct crypto_blkcipher *key, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | int direction, |
Kevin Coffman | 5743d65 | 2008-03-31 10:31:33 -0400 | [diff] [blame] | 230 | u32 seqnum, unsigned char *cksum, unsigned char *buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
| 232 | s32 |
Herbert Xu | 378c669 | 2006-08-22 20:33:54 +1000 | [diff] [blame] | 233 | krb5_get_seq_num(struct crypto_blkcipher *key, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | unsigned char *cksum, |
Kevin Coffman | 5743d65 | 2008-03-31 10:31:33 -0400 | [diff] [blame] | 235 | unsigned char *buf, int *direction, u32 *seqnum); |
Kevin Coffman | 725f286 | 2010-03-17 13:02:46 -0400 | [diff] [blame] | 236 | |
| 237 | int |
| 238 | xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen); |
Kevin Coffman | 4891f2d | 2010-03-17 13:02:53 -0400 | [diff] [blame^] | 239 | |
| 240 | u32 |
| 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); |