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318 lines
11 KiB
318 lines
11 KiB
/* |
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* linux/include/linux/sunrpc/gss_krb5_types.h |
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* |
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* Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h, |
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* lib/gssapi/krb5/gssapiP_krb5.h, and others |
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* |
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* Copyright (c) 2000-2008 The Regents of the University of Michigan. |
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* All rights reserved. |
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* |
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* Andy Adamson <[email protected]> |
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* Bruce Fields <[email protected]> |
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*/ |
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/* |
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* Copyright 1995 by the Massachusetts Institute of Technology. |
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* All Rights Reserved. |
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* |
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* Export of this software from the United States of America may |
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* require a specific license from the United States Government. |
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* It is the responsibility of any person or organization contemplating |
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* export to obtain such a license before exporting. |
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* |
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* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and |
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* distribute this software and its documentation for any purpose and |
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* without fee is hereby granted, provided that the above copyright |
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* notice appear in all copies and that both that copyright notice and |
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* this permission notice appear in supporting documentation, and that |
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* the name of M.I.T. not be used in advertising or publicity pertaining |
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* to distribution of the software without specific, written prior |
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* permission. Furthermore if you modify this software you must label |
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* your software as modified software and not distribute it in such a |
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* fashion that it might be confused with the original M.I.T. software. |
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* M.I.T. makes no representations about the suitability of |
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* this software for any purpose. It is provided "as is" without express |
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* or implied warranty. |
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* |
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*/ |
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#include <crypto/skcipher.h> |
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#include <linux/sunrpc/auth_gss.h> |
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#include <linux/sunrpc/gss_err.h> |
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#include <linux/sunrpc/gss_asn1.h> |
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/* Length of constant used in key derivation */ |
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#define GSS_KRB5_K5CLENGTH (5) |
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/* Maximum key length (in bytes) for the supported crypto algorithms*/ |
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#define GSS_KRB5_MAX_KEYLEN (32) |
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/* Maximum checksum function output for the supported crypto algorithms */ |
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#define GSS_KRB5_MAX_CKSUM_LEN (20) |
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/* Maximum blocksize for the supported crypto algorithms */ |
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#define GSS_KRB5_MAX_BLOCKSIZE (16) |
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struct krb5_ctx; |
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struct gss_krb5_enctype { |
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const u32 etype; /* encryption (key) type */ |
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const u32 ctype; /* checksum type */ |
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const char *name; /* "friendly" name */ |
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const char *encrypt_name; /* crypto encrypt name */ |
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const char *cksum_name; /* crypto checksum name */ |
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const u16 signalg; /* signing algorithm */ |
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const u16 sealalg; /* sealing algorithm */ |
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const u32 blocksize; /* encryption blocksize */ |
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const u32 conflen; /* confounder length |
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(normally the same as |
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the blocksize) */ |
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const u32 cksumlength; /* checksum length */ |
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const u32 keyed_cksum; /* is it a keyed cksum? */ |
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const u32 keybytes; /* raw key len, in bytes */ |
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const u32 keylength; /* final key len, in bytes */ |
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u32 (*encrypt) (struct crypto_sync_skcipher *tfm, |
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void *iv, void *in, void *out, |
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int length); /* encryption function */ |
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u32 (*decrypt) (struct crypto_sync_skcipher *tfm, |
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void *iv, void *in, void *out, |
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int length); /* decryption function */ |
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u32 (*mk_key) (const struct gss_krb5_enctype *gk5e, |
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struct xdr_netobj *in, |
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struct xdr_netobj *out); /* complete key generation */ |
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u32 (*encrypt_v2) (struct krb5_ctx *kctx, u32 offset, |
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struct xdr_buf *buf, |
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struct page **pages); /* v2 encryption function */ |
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u32 (*decrypt_v2) (struct krb5_ctx *kctx, u32 offset, u32 len, |
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struct xdr_buf *buf, u32 *headskip, |
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u32 *tailskip); /* v2 decryption function */ |
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}; |
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/* krb5_ctx flags definitions */ |
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#define KRB5_CTX_FLAG_INITIATOR 0x00000001 |
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#define KRB5_CTX_FLAG_CFX 0x00000002 |
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#define KRB5_CTX_FLAG_ACCEPTOR_SUBKEY 0x00000004 |
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struct krb5_ctx { |
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int initiate; /* 1 = initiating, 0 = accepting */ |
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u32 enctype; |
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u32 flags; |
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const struct gss_krb5_enctype *gk5e; /* enctype-specific info */ |
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struct crypto_sync_skcipher *enc; |
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struct crypto_sync_skcipher *seq; |
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struct crypto_sync_skcipher *acceptor_enc; |
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struct crypto_sync_skcipher *initiator_enc; |
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struct crypto_sync_skcipher *acceptor_enc_aux; |
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struct crypto_sync_skcipher *initiator_enc_aux; |
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u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */ |
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u8 cksum[GSS_KRB5_MAX_KEYLEN]; |
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atomic_t seq_send; |
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atomic64_t seq_send64; |
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time64_t endtime; |
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struct xdr_netobj mech_used; |
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u8 initiator_sign[GSS_KRB5_MAX_KEYLEN]; |
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u8 acceptor_sign[GSS_KRB5_MAX_KEYLEN]; |
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u8 initiator_seal[GSS_KRB5_MAX_KEYLEN]; |
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u8 acceptor_seal[GSS_KRB5_MAX_KEYLEN]; |
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u8 initiator_integ[GSS_KRB5_MAX_KEYLEN]; |
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u8 acceptor_integ[GSS_KRB5_MAX_KEYLEN]; |
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}; |
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/* The length of the Kerberos GSS token header */ |
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#define GSS_KRB5_TOK_HDR_LEN (16) |
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#define KG_TOK_MIC_MSG 0x0101 |
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#define KG_TOK_WRAP_MSG 0x0201 |
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#define KG2_TOK_INITIAL 0x0101 |
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#define KG2_TOK_RESPONSE 0x0202 |
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#define KG2_TOK_MIC 0x0404 |
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#define KG2_TOK_WRAP 0x0504 |
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#define KG2_TOKEN_FLAG_SENTBYACCEPTOR 0x01 |
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#define KG2_TOKEN_FLAG_SEALED 0x02 |
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#define KG2_TOKEN_FLAG_ACCEPTORSUBKEY 0x04 |
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#define KG2_RESP_FLAG_ERROR 0x0001 |
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#define KG2_RESP_FLAG_DELEG_OK 0x0002 |
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enum sgn_alg { |
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SGN_ALG_DES_MAC_MD5 = 0x0000, |
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SGN_ALG_MD2_5 = 0x0001, |
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SGN_ALG_DES_MAC = 0x0002, |
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SGN_ALG_3 = 0x0003, /* not published */ |
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SGN_ALG_HMAC_SHA1_DES3_KD = 0x0004 |
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}; |
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enum seal_alg { |
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SEAL_ALG_NONE = 0xffff, |
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SEAL_ALG_DES = 0x0000, |
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SEAL_ALG_1 = 0x0001, /* not published */ |
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SEAL_ALG_DES3KD = 0x0002 |
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}; |
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#define CKSUMTYPE_CRC32 0x0001 |
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#define CKSUMTYPE_RSA_MD4 0x0002 |
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#define CKSUMTYPE_RSA_MD4_DES 0x0003 |
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#define CKSUMTYPE_DESCBC 0x0004 |
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#define CKSUMTYPE_RSA_MD5 0x0007 |
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#define CKSUMTYPE_RSA_MD5_DES 0x0008 |
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#define CKSUMTYPE_NIST_SHA 0x0009 |
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#define CKSUMTYPE_HMAC_SHA1_DES3 0x000c |
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#define CKSUMTYPE_HMAC_SHA1_96_AES128 0x000f |
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#define CKSUMTYPE_HMAC_SHA1_96_AES256 0x0010 |
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#define CKSUMTYPE_HMAC_MD5_ARCFOUR -138 /* Microsoft md5 hmac cksumtype */ |
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/* from gssapi_err_krb5.h */ |
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#define KG_CCACHE_NOMATCH (39756032L) |
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#define KG_KEYTAB_NOMATCH (39756033L) |
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#define KG_TGT_MISSING (39756034L) |
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#define KG_NO_SUBKEY (39756035L) |
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#define KG_CONTEXT_ESTABLISHED (39756036L) |
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#define KG_BAD_SIGN_TYPE (39756037L) |
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#define KG_BAD_LENGTH (39756038L) |
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#define KG_CTX_INCOMPLETE (39756039L) |
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#define KG_CONTEXT (39756040L) |
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#define KG_CRED (39756041L) |
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#define KG_ENC_DESC (39756042L) |
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#define KG_BAD_SEQ (39756043L) |
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#define KG_EMPTY_CCACHE (39756044L) |
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#define KG_NO_CTYPES (39756045L) |
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/* per Kerberos v5 protocol spec crypto types from the wire. |
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* these get mapped to linux kernel crypto routines. |
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*/ |
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#define ENCTYPE_NULL 0x0000 |
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#define ENCTYPE_DES_CBC_CRC 0x0001 /* DES cbc mode with CRC-32 */ |
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#define ENCTYPE_DES_CBC_MD4 0x0002 /* DES cbc mode with RSA-MD4 */ |
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#define ENCTYPE_DES_CBC_MD5 0x0003 /* DES cbc mode with RSA-MD5 */ |
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#define ENCTYPE_DES_CBC_RAW 0x0004 /* DES cbc mode raw */ |
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/* XXX deprecated? */ |
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#define ENCTYPE_DES3_CBC_SHA 0x0005 /* DES-3 cbc mode with NIST-SHA */ |
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#define ENCTYPE_DES3_CBC_RAW 0x0006 /* DES-3 cbc mode raw */ |
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#define ENCTYPE_DES_HMAC_SHA1 0x0008 |
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#define ENCTYPE_DES3_CBC_SHA1 0x0010 |
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#define ENCTYPE_AES128_CTS_HMAC_SHA1_96 0x0011 |
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#define ENCTYPE_AES256_CTS_HMAC_SHA1_96 0x0012 |
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#define ENCTYPE_ARCFOUR_HMAC 0x0017 |
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#define ENCTYPE_ARCFOUR_HMAC_EXP 0x0018 |
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#define ENCTYPE_UNKNOWN 0x01ff |
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/* |
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* Constants used for key derivation |
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*/ |
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/* for 3DES */ |
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#define KG_USAGE_SEAL (22) |
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#define KG_USAGE_SIGN (23) |
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#define KG_USAGE_SEQ (24) |
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/* from rfc3961 */ |
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#define KEY_USAGE_SEED_CHECKSUM (0x99) |
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#define KEY_USAGE_SEED_ENCRYPTION (0xAA) |
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#define KEY_USAGE_SEED_INTEGRITY (0x55) |
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/* from rfc4121 */ |
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#define KG_USAGE_ACCEPTOR_SEAL (22) |
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#define KG_USAGE_ACCEPTOR_SIGN (23) |
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#define KG_USAGE_INITIATOR_SEAL (24) |
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#define KG_USAGE_INITIATOR_SIGN (25) |
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/* |
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* This compile-time check verifies that we will not exceed the |
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* slack space allotted by the client and server auth_gss code |
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* before they call gss_wrap(). |
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*/ |
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#define GSS_KRB5_MAX_SLACK_NEEDED \ |
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(GSS_KRB5_TOK_HDR_LEN /* gss token header */ \ |
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+ GSS_KRB5_MAX_CKSUM_LEN /* gss token checksum */ \ |
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+ GSS_KRB5_MAX_BLOCKSIZE /* confounder */ \ |
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+ GSS_KRB5_MAX_BLOCKSIZE /* possible padding */ \ |
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+ GSS_KRB5_TOK_HDR_LEN /* encrypted hdr in v2 token */\ |
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+ GSS_KRB5_MAX_CKSUM_LEN /* encryption hmac */ \ |
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+ 4 + 4 /* RPC verifier */ \ |
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+ GSS_KRB5_TOK_HDR_LEN \ |
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+ GSS_KRB5_MAX_CKSUM_LEN) |
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u32 |
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make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen, |
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struct xdr_buf *body, int body_offset, u8 *cksumkey, |
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unsigned int usage, struct xdr_netobj *cksumout); |
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u32 |
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make_checksum_v2(struct krb5_ctx *, char *header, int hdrlen, |
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struct xdr_buf *body, int body_offset, u8 *key, |
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unsigned int usage, struct xdr_netobj *cksum); |
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u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
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struct xdr_netobj *); |
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u32 gss_verify_mic_kerberos(struct gss_ctx *, struct xdr_buf *, |
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struct xdr_netobj *); |
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u32 |
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gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset, |
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struct xdr_buf *outbuf, struct page **pages); |
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u32 |
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gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset, int len, |
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struct xdr_buf *buf); |
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u32 |
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krb5_encrypt(struct crypto_sync_skcipher *key, |
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void *iv, void *in, void *out, int length); |
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u32 |
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krb5_decrypt(struct crypto_sync_skcipher *key, |
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void *iv, void *in, void *out, int length); |
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int |
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gss_encrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *outbuf, |
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int offset, struct page **pages); |
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int |
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gss_decrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *inbuf, |
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int offset); |
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s32 |
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krb5_make_seq_num(struct krb5_ctx *kctx, |
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struct crypto_sync_skcipher *key, |
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int direction, |
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u32 seqnum, unsigned char *cksum, unsigned char *buf); |
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s32 |
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krb5_get_seq_num(struct krb5_ctx *kctx, |
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unsigned char *cksum, |
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unsigned char *buf, int *direction, u32 *seqnum); |
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int |
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xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen); |
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u32 |
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krb5_derive_key(const struct gss_krb5_enctype *gk5e, |
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const struct xdr_netobj *inkey, |
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struct xdr_netobj *outkey, |
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const struct xdr_netobj *in_constant, |
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gfp_t gfp_mask); |
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u32 |
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gss_krb5_des3_make_key(const struct gss_krb5_enctype *gk5e, |
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struct xdr_netobj *randombits, |
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struct xdr_netobj *key); |
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u32 |
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gss_krb5_aes_make_key(const struct gss_krb5_enctype *gk5e, |
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struct xdr_netobj *randombits, |
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struct xdr_netobj *key); |
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u32 |
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gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset, |
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struct xdr_buf *buf, |
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struct page **pages); |
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u32 |
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gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset, u32 len, |
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struct xdr_buf *buf, u32 *plainoffset, |
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u32 *plainlen); |
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void |
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gss_krb5_make_confounder(char *p, u32 conflen);
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