Edit File: gss_krb5.h
/* * 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 <linux/crypto.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_blkcipher *tfm, void *iv, void *in, void *out, int length); /* encryption function */ u32 (*decrypt) (struct crypto_blkcipher *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_blkcipher *enc; struct crypto_blkcipher *seq; struct crypto_blkcipher *acceptor_enc; struct crypto_blkcipher *initiator_enc; struct crypto_blkcipher *acceptor_enc_aux; struct crypto_blkcipher *initiator_enc_aux; u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */ u8 cksum[GSS_KRB5_MAX_KEYLEN]; s32 endtime; u32 seq_send; u64 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]; }; extern spinlock_t krb5_seq_lock; /* 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_blkcipher *key, void *iv, void *in, void *out, int length); u32 krb5_decrypt(struct crypto_blkcipher *key, void *iv, void *in, void *out, int length); int gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *outbuf, int offset, struct page **pages); int gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *inbuf, int offset); s32 krb5_make_seq_num(struct krb5_ctx *kctx, struct crypto_blkcipher *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_blkcipher *cipher, unsigned char *cksum); int krb5_rc4_setup_enc_key(struct krb5_ctx *kctx, struct crypto_blkcipher *cipher, s32 seqnum); void gss_krb5_make_confounder(char *p, u32 conflen);