* Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h,
* lib/gssapi/krb5/gssapiP_krb5.h, and others
*
- * Copyright (c) 2000 The Regents of the University of Michigan.
+ * Copyright (c) 2000-2008 The Regents of the University of Michigan.
* All rights reserved.
*
* Andy Adamson <andros@umich.edu>
*
*/
+#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, int ec,
+ 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;
#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,
#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 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
-s32
-make_checksum(char *, char *header, int hdrlen, struct xdr_buf *body,
- int body_offset, struct xdr_netobj *cksum);
+/*
+ * 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 *);
int offset);
s32
-krb5_make_seq_num(struct crypto_blkcipher *key,
+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 crypto_blkcipher *key,
+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, int ec,
+ 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);
git.openpandora.org / pandora-kernel.git / blobdiff