1 files changed, 178 insertions, 6 deletions

diff --git a/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
index e7bbdba474d5..5af2931cf58d 100644
--- a/include/linux/sunrpc/gss_krb5.h
+++ b/include/linux/sunrpc/gss_krb5.h
@@ -4,7 +4,7 @@
  *  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>
@@ -36,17 +36,86 @@
  *
  */
 
+#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;
@@ -57,6 +126,18 @@ 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,
@@ -81,6 +162,9 @@ enum seal_alg {
 #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)
@@ -111,11 +195,56 @@ enum seal_alg {
 #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 *);
@@ -149,11 +278,54 @@ gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *inbuf,
                     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);