| /* |
| * linux/include/linux/sunrpc/gss_krb5_types.h |
| * |
| * Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h, |
| * lib/gssapi/krb5/gssapiP_krb5.h, and others |
| * |
| * Copyright (c) 2000-2008 The Regents of the University of Michigan. |
| * All rights reserved. |
| * |
| * Andy Adamson <andros@umich.edu> |
| * Bruce Fields <bfields@umich.edu> |
| */ |
| |
| /* |
| * Copyright 1995 by the Massachusetts Institute of Technology. |
| * All Rights Reserved. |
| * |
| * Export of this software from the United States of America may |
| * require a specific license from the United States Government. |
| * It is the responsibility of any person or organization contemplating |
| * export to obtain such a license before exporting. |
| * |
| * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and |
| * distribute this software and its documentation for any purpose and |
| * without fee is hereby granted, provided that the above copyright |
| * notice appear in all copies and that both that copyright notice and |
| * this permission notice appear in supporting documentation, and that |
| * the name of M.I.T. not be used in advertising or publicity pertaining |
| * to distribution of the software without specific, written prior |
| * permission. Furthermore if you modify this software you must label |
| * your software as modified software and not distribute it in such a |
| * fashion that it might be confused with the original M.I.T. software. |
| * M.I.T. makes no representations about the suitability of |
| * this software for any purpose. It is provided "as is" without express |
| * or implied warranty. |
| * |
| */ |
| |
| #include <crypto/skcipher.h> |
| #include <linux/sunrpc/auth_gss.h> |
| #include <linux/sunrpc/gss_err.h> |
| #include <linux/sunrpc/gss_asn1.h> |
| |
| /* Length of constant used in key derivation */ |
| #define GSS_KRB5_K5CLENGTH (5) |
| |
| /* Maximum key length (in bytes) for the supported crypto algorithms*/ |
| #define GSS_KRB5_MAX_KEYLEN (32) |
| |
| /* Maximum checksum function output for the supported crypto algorithms */ |
| #define GSS_KRB5_MAX_CKSUM_LEN (20) |
| |
| /* Maximum blocksize for the supported crypto algorithms */ |
| #define GSS_KRB5_MAX_BLOCKSIZE (16) |
| |
| struct krb5_ctx; |
| |
| struct gss_krb5_enctype { |
| const u32 etype; /* encryption (key) type */ |
| const u32 ctype; /* checksum type */ |
| const char *name; /* "friendly" name */ |
| const char *encrypt_name; /* crypto encrypt name */ |
| const char *cksum_name; /* crypto checksum name */ |
| const u16 signalg; /* signing algorithm */ |
| const u16 sealalg; /* sealing algorithm */ |
| const u32 blocksize; /* encryption blocksize */ |
| const u32 conflen; /* confounder length |
| (normally the same as |
| the blocksize) */ |
| const u32 cksumlength; /* checksum length */ |
| const u32 keyed_cksum; /* is it a keyed cksum? */ |
| const u32 keybytes; /* raw key len, in bytes */ |
| const u32 keylength; /* final key len, in bytes */ |
| u32 (*encrypt) (struct crypto_sync_skcipher *tfm, |
| void *iv, void *in, void *out, |
| int length); /* encryption function */ |
| u32 (*decrypt) (struct crypto_sync_skcipher *tfm, |
| void *iv, void *in, void *out, |
| int length); /* decryption function */ |
| u32 (*mk_key) (const struct gss_krb5_enctype *gk5e, |
| struct xdr_netobj *in, |
| struct xdr_netobj *out); /* complete key generation */ |
| u32 (*encrypt_v2) (struct krb5_ctx *kctx, u32 offset, |
| struct xdr_buf *buf, |
| struct page **pages); /* v2 encryption function */ |
| u32 (*decrypt_v2) (struct krb5_ctx *kctx, u32 offset, |
| struct xdr_buf *buf, u32 *headskip, |
| u32 *tailskip); /* v2 decryption function */ |
| }; |
| |
| /* krb5_ctx flags definitions */ |
| #define KRB5_CTX_FLAG_INITIATOR 0x00000001 |
| #define KRB5_CTX_FLAG_CFX 0x00000002 |
| #define KRB5_CTX_FLAG_ACCEPTOR_SUBKEY 0x00000004 |
| |
| struct krb5_ctx { |
| int initiate; /* 1 = initiating, 0 = accepting */ |
| u32 enctype; |
| u32 flags; |
| const struct gss_krb5_enctype *gk5e; /* enctype-specific info */ |
| struct crypto_sync_skcipher *enc; |
| struct crypto_sync_skcipher *seq; |
| struct crypto_sync_skcipher *acceptor_enc; |
| struct crypto_sync_skcipher *initiator_enc; |
| struct crypto_sync_skcipher *acceptor_enc_aux; |
| struct crypto_sync_skcipher *initiator_enc_aux; |
| u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */ |
| u8 cksum[GSS_KRB5_MAX_KEYLEN]; |
| s32 endtime; |
| atomic_t seq_send; |
| atomic64_t seq_send64; |
| struct xdr_netobj mech_used; |
| u8 initiator_sign[GSS_KRB5_MAX_KEYLEN]; |
| u8 acceptor_sign[GSS_KRB5_MAX_KEYLEN]; |
| u8 initiator_seal[GSS_KRB5_MAX_KEYLEN]; |
| u8 acceptor_seal[GSS_KRB5_MAX_KEYLEN]; |
| u8 initiator_integ[GSS_KRB5_MAX_KEYLEN]; |
| u8 acceptor_integ[GSS_KRB5_MAX_KEYLEN]; |
| }; |
| |
| /* The length of the Kerberos GSS token header */ |
| #define GSS_KRB5_TOK_HDR_LEN (16) |
| |
| #define KG_TOK_MIC_MSG 0x0101 |
| #define KG_TOK_WRAP_MSG 0x0201 |
| |
| #define KG2_TOK_INITIAL 0x0101 |
| #define KG2_TOK_RESPONSE 0x0202 |
| #define KG2_TOK_MIC 0x0404 |
| #define KG2_TOK_WRAP 0x0504 |
| |
| #define KG2_TOKEN_FLAG_SENTBYACCEPTOR 0x01 |
| #define KG2_TOKEN_FLAG_SEALED 0x02 |
| #define KG2_TOKEN_FLAG_ACCEPTORSUBKEY 0x04 |
| |
| #define KG2_RESP_FLAG_ERROR 0x0001 |
| #define KG2_RESP_FLAG_DELEG_OK 0x0002 |
| |
| enum sgn_alg { |
| SGN_ALG_DES_MAC_MD5 = 0x0000, |
| SGN_ALG_MD2_5 = 0x0001, |
| SGN_ALG_DES_MAC = 0x0002, |
| SGN_ALG_3 = 0x0003, /* not published */ |
| SGN_ALG_HMAC_MD5 = 0x0011, /* microsoft w2k; no support */ |
| SGN_ALG_HMAC_SHA1_DES3_KD = 0x0004 |
| }; |
| enum seal_alg { |
| SEAL_ALG_NONE = 0xffff, |
| SEAL_ALG_DES = 0x0000, |
| SEAL_ALG_1 = 0x0001, /* not published */ |
| SEAL_ALG_MICROSOFT_RC4 = 0x0010,/* microsoft w2k; no support */ |
| SEAL_ALG_DES3KD = 0x0002 |
| }; |
| |
| #define CKSUMTYPE_CRC32 0x0001 |
| #define CKSUMTYPE_RSA_MD4 0x0002 |
| #define CKSUMTYPE_RSA_MD4_DES 0x0003 |
| #define CKSUMTYPE_DESCBC 0x0004 |
| #define CKSUMTYPE_RSA_MD5 0x0007 |
| #define CKSUMTYPE_RSA_MD5_DES 0x0008 |
| #define CKSUMTYPE_NIST_SHA 0x0009 |
| #define CKSUMTYPE_HMAC_SHA1_DES3 0x000c |
| #define CKSUMTYPE_HMAC_SHA1_96_AES128 0x000f |
| #define CKSUMTYPE_HMAC_SHA1_96_AES256 0x0010 |
| #define CKSUMTYPE_HMAC_MD5_ARCFOUR -138 /* Microsoft md5 hmac cksumtype */ |
| |
| /* from gssapi_err_krb5.h */ |
| #define KG_CCACHE_NOMATCH (39756032L) |
| #define KG_KEYTAB_NOMATCH (39756033L) |
| #define KG_TGT_MISSING (39756034L) |
| #define KG_NO_SUBKEY (39756035L) |
| #define KG_CONTEXT_ESTABLISHED (39756036L) |
| #define KG_BAD_SIGN_TYPE (39756037L) |
| #define KG_BAD_LENGTH (39756038L) |
| #define KG_CTX_INCOMPLETE (39756039L) |
| #define KG_CONTEXT (39756040L) |
| #define KG_CRED (39756041L) |
| #define KG_ENC_DESC (39756042L) |
| #define KG_BAD_SEQ (39756043L) |
| #define KG_EMPTY_CCACHE (39756044L) |
| #define KG_NO_CTYPES (39756045L) |
| |
| /* per Kerberos v5 protocol spec crypto types from the wire. |
| * these get mapped to linux kernel crypto routines. |
| */ |
| #define ENCTYPE_NULL 0x0000 |
| #define ENCTYPE_DES_CBC_CRC 0x0001 /* DES cbc mode with CRC-32 */ |
| #define ENCTYPE_DES_CBC_MD4 0x0002 /* DES cbc mode with RSA-MD4 */ |
| #define ENCTYPE_DES_CBC_MD5 0x0003 /* DES cbc mode with RSA-MD5 */ |
| #define ENCTYPE_DES_CBC_RAW 0x0004 /* DES cbc mode raw */ |
| /* XXX deprecated? */ |
| #define ENCTYPE_DES3_CBC_SHA 0x0005 /* DES-3 cbc mode with NIST-SHA */ |
| #define ENCTYPE_DES3_CBC_RAW 0x0006 /* DES-3 cbc mode raw */ |
| #define ENCTYPE_DES_HMAC_SHA1 0x0008 |
| #define ENCTYPE_DES3_CBC_SHA1 0x0010 |
| #define ENCTYPE_AES128_CTS_HMAC_SHA1_96 0x0011 |
| #define ENCTYPE_AES256_CTS_HMAC_SHA1_96 0x0012 |
| #define ENCTYPE_ARCFOUR_HMAC 0x0017 |
| #define ENCTYPE_ARCFOUR_HMAC_EXP 0x0018 |
| #define ENCTYPE_UNKNOWN 0x01ff |
| |
| /* |
| * Constants used for key derivation |
| */ |
| /* for 3DES */ |
| #define KG_USAGE_SEAL (22) |
| #define KG_USAGE_SIGN (23) |
| #define KG_USAGE_SEQ (24) |
| |
| /* from rfc3961 */ |
| #define KEY_USAGE_SEED_CHECKSUM (0x99) |
| #define KEY_USAGE_SEED_ENCRYPTION (0xAA) |
| #define KEY_USAGE_SEED_INTEGRITY (0x55) |
| |
| /* from rfc4121 */ |
| #define KG_USAGE_ACCEPTOR_SEAL (22) |
| #define KG_USAGE_ACCEPTOR_SIGN (23) |
| #define KG_USAGE_INITIATOR_SEAL (24) |
| #define KG_USAGE_INITIATOR_SIGN (25) |
| |
| /* |
| * This compile-time check verifies that we will not exceed the |
| * slack space allotted by the client and server auth_gss code |
| * before they call gss_wrap(). |
| */ |
| #define GSS_KRB5_MAX_SLACK_NEEDED \ |
| (GSS_KRB5_TOK_HDR_LEN /* gss token header */ \ |
| + GSS_KRB5_MAX_CKSUM_LEN /* gss token checksum */ \ |
| + GSS_KRB5_MAX_BLOCKSIZE /* confounder */ \ |
| + GSS_KRB5_MAX_BLOCKSIZE /* possible padding */ \ |
| + GSS_KRB5_TOK_HDR_LEN /* encrypted hdr in v2 token */\ |
| + GSS_KRB5_MAX_CKSUM_LEN /* encryption hmac */ \ |
| + 4 + 4 /* RPC verifier */ \ |
| + GSS_KRB5_TOK_HDR_LEN \ |
| + GSS_KRB5_MAX_CKSUM_LEN) |
| |
| u32 |
| make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen, |
| struct xdr_buf *body, int body_offset, u8 *cksumkey, |
| unsigned int usage, struct xdr_netobj *cksumout); |
| |
| u32 |
| make_checksum_v2(struct krb5_ctx *, char *header, int hdrlen, |
| struct xdr_buf *body, int body_offset, u8 *key, |
| unsigned int usage, struct xdr_netobj *cksum); |
| |
| u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
| struct xdr_netobj *); |
| |
| u32 gss_verify_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
| struct xdr_netobj *); |
| |
| u32 |
| gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset, |
| struct xdr_buf *outbuf, struct page **pages); |
| |
| u32 |
| gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset, |
| struct xdr_buf *buf); |
| |
| |
| u32 |
| krb5_encrypt(struct crypto_sync_skcipher *key, |
| void *iv, void *in, void *out, int length); |
| |
| u32 |
| krb5_decrypt(struct crypto_sync_skcipher *key, |
| void *iv, void *in, void *out, int length); |
| |
| int |
| gss_encrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *outbuf, |
| int offset, struct page **pages); |
| |
| int |
| gss_decrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *inbuf, |
| int offset); |
| |
| s32 |
| krb5_make_seq_num(struct krb5_ctx *kctx, |
| struct crypto_sync_skcipher *key, |
| int direction, |
| u32 seqnum, unsigned char *cksum, unsigned char *buf); |
| |
| s32 |
| krb5_get_seq_num(struct krb5_ctx *kctx, |
| unsigned char *cksum, |
| unsigned char *buf, int *direction, u32 *seqnum); |
| |
| int |
| xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen); |
| |
| u32 |
| krb5_derive_key(const struct gss_krb5_enctype *gk5e, |
| const struct xdr_netobj *inkey, |
| struct xdr_netobj *outkey, |
| const struct xdr_netobj *in_constant, |
| gfp_t gfp_mask); |
| |
| u32 |
| gss_krb5_des3_make_key(const struct gss_krb5_enctype *gk5e, |
| struct xdr_netobj *randombits, |
| struct xdr_netobj *key); |
| |
| u32 |
| gss_krb5_aes_make_key(const struct gss_krb5_enctype *gk5e, |
| struct xdr_netobj *randombits, |
| struct xdr_netobj *key); |
| |
| u32 |
| gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset, |
| struct xdr_buf *buf, |
| struct page **pages); |
| |
| u32 |
| gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset, |
| struct xdr_buf *buf, u32 *plainoffset, |
| u32 *plainlen); |
| |
| int |
| krb5_rc4_setup_seq_key(struct krb5_ctx *kctx, |
| struct crypto_sync_skcipher *cipher, |
| unsigned char *cksum); |
| |
| int |
| krb5_rc4_setup_enc_key(struct krb5_ctx *kctx, |
| struct crypto_sync_skcipher *cipher, |
| s32 seqnum); |
| void |
| gss_krb5_make_confounder(char *p, u32 conflen); |
