+++ /dev/null
-/*
- * linux/include/linux/sunrpc/gss_spkm3.h
- *
- * Copyright (c) 2000 The Regents of the University of Michigan.
- * All rights reserved.
- *
- * Andy Adamson <andros@umich.edu>
- */
-
-#include <linux/sunrpc/auth_gss.h>
-#include <linux/sunrpc/gss_err.h>
-#include <linux/sunrpc/gss_asn1.h>
-
-struct spkm3_ctx {
- struct xdr_netobj ctx_id; /* per message context id */
- int endtime; /* endtime of the context */
- struct xdr_netobj mech_used;
- unsigned int ret_flags ;
- struct xdr_netobj conf_alg;
- struct xdr_netobj derived_conf_key;
- struct xdr_netobj intg_alg;
- struct xdr_netobj derived_integ_key;
-};
-
-/* OIDs declarations for K-ALG, I-ALG, C-ALG, and OWF-ALG */
-extern const struct xdr_netobj hmac_md5_oid;
-extern const struct xdr_netobj cast5_cbc_oid;
-
-/* SPKM InnerContext Token types */
-
-#define SPKM_ERROR_TOK 3
-#define SPKM_MIC_TOK 4
-#define SPKM_WRAP_TOK 5
-#define SPKM_DEL_TOK 6
-
-u32 spkm3_make_token(struct spkm3_ctx *ctx, struct xdr_buf * text, struct xdr_netobj * token, int toktype);
-
-u32 spkm3_read_token(struct spkm3_ctx *ctx, struct xdr_netobj *read_token, struct xdr_buf *message_buffer, int toktype);
-
-#define CKSUMTYPE_RSA_MD5 0x0007
-#define CKSUMTYPE_HMAC_MD5 0x0008
-
-s32 make_spkm3_checksum(s32 cksumtype, struct xdr_netobj *key, char *header,
- unsigned int hdrlen, struct xdr_buf *body,
- unsigned int body_offset, struct xdr_netobj *cksum);
-void asn1_bitstring_len(struct xdr_netobj *in, int *enclen, int *zerobits);
-int decode_asn1_bitstring(struct xdr_netobj *out, char *in, int enclen,
- int explen);
-void spkm3_mic_header(unsigned char **hdrbuf, unsigned int *hdrlen,
- unsigned char *ctxhdr, int elen, int zbit);
-void spkm3_make_mic_token(unsigned char **tokp, int toklen,
- struct xdr_netobj *mic_hdr,
- struct xdr_netobj *md5cksum, int md5elen, int md5zbit);
-u32 spkm3_verify_mic_token(unsigned char **tokp, int *mic_hdrlen,
- unsigned char **cksum);
Kerberos support should be installed.
If unsure, say Y.
-
-config RPCSEC_GSS_SPKM3
- tristate "Secure RPC: SPKM3 mechanism (EXPERIMENTAL)"
- depends on SUNRPC && EXPERIMENTAL
- select SUNRPC_GSS
- select CRYPTO
- select CRYPTO_MD5
- select CRYPTO_DES
- select CRYPTO_CAST5
- select CRYPTO_CBC
- help
- Choose Y here to enable Secure RPC using the SPKM3 public key
- GSS-API mechanism (RFC 2025).
-
- Secure RPC calls with SPKM3 require an auxiliary userspace
- daemon which may be found in the Linux nfs-utils package
- available from http://linux-nfs.org/.
-
- If unsure, say N.
rpcsec_gss_krb5-objs := gss_krb5_mech.o gss_krb5_seal.o gss_krb5_unseal.o \
gss_krb5_seqnum.o gss_krb5_wrap.o gss_krb5_crypto.o gss_krb5_keys.o
-
-obj-$(CONFIG_RPCSEC_GSS_SPKM3) += rpcsec_gss_spkm3.o
-
-rpcsec_gss_spkm3-objs := gss_spkm3_mech.o gss_spkm3_seal.o gss_spkm3_unseal.o \
- gss_spkm3_token.o
+++ /dev/null
-/*
- * linux/net/sunrpc/gss_spkm3_mech.c
- *
- * Copyright (c) 2003 The Regents of the University of Michigan.
- * All rights reserved.
- *
- * Andy Adamson <andros@umich.edu>
- * J. Bruce Fields <bfields@umich.edu>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/sunrpc/auth.h>
-#include <linux/in.h>
-#include <linux/sunrpc/svcauth_gss.h>
-#include <linux/sunrpc/gss_spkm3.h>
-#include <linux/sunrpc/xdr.h>
-#include <linux/crypto.h>
-
-#ifdef RPC_DEBUG
-# define RPCDBG_FACILITY RPCDBG_AUTH
-#endif
-
-static const void *
-simple_get_bytes(const void *p, const void *end, void *res, int len)
-{
- const void *q = (const void *)((const char *)p + len);
- if (unlikely(q > end || q < p))
- return ERR_PTR(-EFAULT);
- memcpy(res, p, len);
- return q;
-}
-
-static const void *
-simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
-{
- const void *q;
- unsigned int len;
- p = simple_get_bytes(p, end, &len, sizeof(len));
- if (IS_ERR(p))
- return p;
- res->len = len;
- if (len == 0) {
- res->data = NULL;
- return p;
- }
- q = (const void *)((const char *)p + len);
- if (unlikely(q > end || q < p))
- return ERR_PTR(-EFAULT);
- res->data = kmemdup(p, len, GFP_NOFS);
- if (unlikely(res->data == NULL))
- return ERR_PTR(-ENOMEM);
- return q;
-}
-
-static int
-gss_import_sec_context_spkm3(const void *p, size_t len,
- struct gss_ctx *ctx_id,
- gfp_t gfp_mask)
-{
- const void *end = (const void *)((const char *)p + len);
- struct spkm3_ctx *ctx;
- int version;
-
- if (!(ctx = kzalloc(sizeof(*ctx), gfp_mask)))
- goto out_err;
-
- p = simple_get_bytes(p, end, &version, sizeof(version));
- if (IS_ERR(p))
- goto out_err_free_ctx;
- if (version != 1) {
- dprintk("RPC: unknown spkm3 token format: "
- "obsolete nfs-utils?\n");
- p = ERR_PTR(-EINVAL);
- goto out_err_free_ctx;
- }
-
- p = simple_get_netobj(p, end, &ctx->ctx_id);
- if (IS_ERR(p))
- goto out_err_free_ctx;
-
- p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
- if (IS_ERR(p))
- goto out_err_free_ctx_id;
-
- p = simple_get_netobj(p, end, &ctx->mech_used);
- if (IS_ERR(p))
- goto out_err_free_ctx_id;
-
- p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
- if (IS_ERR(p))
- goto out_err_free_mech;
-
- p = simple_get_netobj(p, end, &ctx->conf_alg);
- if (IS_ERR(p))
- goto out_err_free_mech;
-
- p = simple_get_netobj(p, end, &ctx->derived_conf_key);
- if (IS_ERR(p))
- goto out_err_free_conf_alg;
-
- p = simple_get_netobj(p, end, &ctx->intg_alg);
- if (IS_ERR(p))
- goto out_err_free_conf_key;
-
- p = simple_get_netobj(p, end, &ctx->derived_integ_key);
- if (IS_ERR(p))
- goto out_err_free_intg_alg;
-
- if (p != end) {
- p = ERR_PTR(-EFAULT);
- goto out_err_free_intg_key;
- }
-
- ctx_id->internal_ctx_id = ctx;
-
- dprintk("RPC: Successfully imported new spkm context.\n");
- return 0;
-
-out_err_free_intg_key:
- kfree(ctx->derived_integ_key.data);
-out_err_free_intg_alg:
- kfree(ctx->intg_alg.data);
-out_err_free_conf_key:
- kfree(ctx->derived_conf_key.data);
-out_err_free_conf_alg:
- kfree(ctx->conf_alg.data);
-out_err_free_mech:
- kfree(ctx->mech_used.data);
-out_err_free_ctx_id:
- kfree(ctx->ctx_id.data);
-out_err_free_ctx:
- kfree(ctx);
-out_err:
- return PTR_ERR(p);
-}
-
-static void
-gss_delete_sec_context_spkm3(void *internal_ctx)
-{
- struct spkm3_ctx *sctx = internal_ctx;
-
- kfree(sctx->derived_integ_key.data);
- kfree(sctx->intg_alg.data);
- kfree(sctx->derived_conf_key.data);
- kfree(sctx->conf_alg.data);
- kfree(sctx->mech_used.data);
- kfree(sctx->ctx_id.data);
- kfree(sctx);
-}
-
-static u32
-gss_verify_mic_spkm3(struct gss_ctx *ctx,
- struct xdr_buf *signbuf,
- struct xdr_netobj *checksum)
-{
- u32 maj_stat = 0;
- struct spkm3_ctx *sctx = ctx->internal_ctx_id;
-
- maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK);
-
- dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
- return maj_stat;
-}
-
-static u32
-gss_get_mic_spkm3(struct gss_ctx *ctx,
- struct xdr_buf *message_buffer,
- struct xdr_netobj *message_token)
-{
- u32 err = 0;
- struct spkm3_ctx *sctx = ctx->internal_ctx_id;
-
- err = spkm3_make_token(sctx, message_buffer,
- message_token, SPKM_MIC_TOK);
- dprintk("RPC: gss_get_mic_spkm3 returning %d\n", err);
- return err;
-}
-
-static const struct gss_api_ops gss_spkm3_ops = {
- .gss_import_sec_context = gss_import_sec_context_spkm3,
- .gss_get_mic = gss_get_mic_spkm3,
- .gss_verify_mic = gss_verify_mic_spkm3,
- .gss_delete_sec_context = gss_delete_sec_context_spkm3,
-};
-
-static struct pf_desc gss_spkm3_pfs[] = {
- {RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"},
- {RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
-};
-
-static struct gss_api_mech gss_spkm3_mech = {
- .gm_name = "spkm3",
- .gm_owner = THIS_MODULE,
- .gm_oid = {7, "\053\006\001\005\005\001\003"},
- .gm_ops = &gss_spkm3_ops,
- .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
- .gm_pfs = gss_spkm3_pfs,
-};
-
-static int __init init_spkm3_module(void)
-{
- int status;
-
- status = gss_mech_register(&gss_spkm3_mech);
- if (status)
- printk("Failed to register spkm3 gss mechanism!\n");
- return status;
-}
-
-static void __exit cleanup_spkm3_module(void)
-{
- gss_mech_unregister(&gss_spkm3_mech);
-}
-
-MODULE_LICENSE("GPL");
-module_init(init_spkm3_module);
-module_exit(cleanup_spkm3_module);
+++ /dev/null
-/*
- * linux/net/sunrpc/gss_spkm3_seal.c
- *
- * Copyright (c) 2003 The Regents of the University of Michigan.
- * All rights reserved.
- *
- * Andy Adamson <andros@umich.edu>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <linux/types.h>
-#include <linux/jiffies.h>
-#include <linux/sunrpc/gss_spkm3.h>
-#include <linux/random.h>
-#include <linux/crypto.h>
-#include <linux/pagemap.h>
-#include <linux/scatterlist.h>
-#include <linux/sunrpc/xdr.h>
-
-#ifdef RPC_DEBUG
-# define RPCDBG_FACILITY RPCDBG_AUTH
-#endif
-
-const struct xdr_netobj hmac_md5_oid = { 8, "\x2B\x06\x01\x05\x05\x08\x01\x01"};
-const struct xdr_netobj cast5_cbc_oid = {9, "\x2A\x86\x48\x86\xF6\x7D\x07\x42\x0A"};
-
-/*
- * spkm3_make_token()
- *
- * Only SPKM_MIC_TOK with md5 intg-alg is supported
- */
-
-u32
-spkm3_make_token(struct spkm3_ctx *ctx,
- struct xdr_buf * text, struct xdr_netobj * token,
- int toktype)
-{
- s32 checksum_type;
- char tokhdrbuf[25];
- char cksumdata[16];
- struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
- struct xdr_netobj mic_hdr = {.len = 0, .data = tokhdrbuf};
- int tokenlen = 0;
- unsigned char *ptr;
- s32 now;
- int ctxelen = 0, ctxzbit = 0;
- int md5elen = 0, md5zbit = 0;
-
- now = jiffies;
-
- if (ctx->ctx_id.len != 16) {
- dprintk("RPC: spkm3_make_token BAD ctx_id.len %d\n",
- ctx->ctx_id.len);
- goto out_err;
- }
-
- if (!g_OID_equal(&ctx->intg_alg, &hmac_md5_oid)) {
- dprintk("RPC: gss_spkm3_seal: unsupported I-ALG "
- "algorithm. only support hmac-md5 I-ALG.\n");
- goto out_err;
- } else
- checksum_type = CKSUMTYPE_HMAC_MD5;
-
- if (!g_OID_equal(&ctx->conf_alg, &cast5_cbc_oid)) {
- dprintk("RPC: gss_spkm3_seal: unsupported C-ALG "
- "algorithm\n");
- goto out_err;
- }
-
- if (toktype == SPKM_MIC_TOK) {
- /* Calculate checksum over the mic-header */
- asn1_bitstring_len(&ctx->ctx_id, &ctxelen, &ctxzbit);
- spkm3_mic_header(&mic_hdr.data, &mic_hdr.len, ctx->ctx_id.data,
- ctxelen, ctxzbit);
- if (make_spkm3_checksum(checksum_type, &ctx->derived_integ_key,
- (char *)mic_hdr.data, mic_hdr.len,
- text, 0, &md5cksum))
- goto out_err;
-
- asn1_bitstring_len(&md5cksum, &md5elen, &md5zbit);
- tokenlen = 10 + ctxelen + 1 + md5elen + 1;
-
- /* Create token header using generic routines */
- token->len = g_token_size(&ctx->mech_used, tokenlen + 2);
-
- ptr = token->data;
- g_make_token_header(&ctx->mech_used, tokenlen + 2, &ptr);
-
- spkm3_make_mic_token(&ptr, tokenlen, &mic_hdr, &md5cksum, md5elen, md5zbit);
- } else if (toktype == SPKM_WRAP_TOK) { /* Not Supported */
- dprintk("RPC: gss_spkm3_seal: SPKM_WRAP_TOK "
- "not supported\n");
- goto out_err;
- }
-
- /* XXX need to implement sequence numbers, and ctx->expired */
-
- return GSS_S_COMPLETE;
-out_err:
- token->data = NULL;
- token->len = 0;
- return GSS_S_FAILURE;
-}
-
-static int
-spkm3_checksummer(struct scatterlist *sg, void *data)
-{
- struct hash_desc *desc = data;
-
- return crypto_hash_update(desc, sg, sg->length);
-}
-
-/* checksum the plaintext data and hdrlen bytes of the token header */
-s32
-make_spkm3_checksum(s32 cksumtype, struct xdr_netobj *key, char *header,
- unsigned int hdrlen, struct xdr_buf *body,
- unsigned int body_offset, struct xdr_netobj *cksum)
-{
- char *cksumname;
- struct hash_desc desc; /* XXX add to ctx? */
- struct scatterlist sg[1];
- int err;
-
- switch (cksumtype) {
- case CKSUMTYPE_HMAC_MD5:
- cksumname = "hmac(md5)";
- break;
- default:
- dprintk("RPC: spkm3_make_checksum:"
- " unsupported checksum %d", cksumtype);
- return GSS_S_FAILURE;
- }
-
- if (key->data == NULL || key->len <= 0) return GSS_S_FAILURE;
-
- desc.tfm = crypto_alloc_hash(cksumname, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(desc.tfm))
- return GSS_S_FAILURE;
- cksum->len = crypto_hash_digestsize(desc.tfm);
- desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
-
- err = crypto_hash_setkey(desc.tfm, key->data, key->len);
- if (err)
- goto out;
-
- err = crypto_hash_init(&desc);
- if (err)
- goto out;
-
- sg_init_one(sg, header, hdrlen);
- crypto_hash_update(&desc, sg, sg->length);
-
- xdr_process_buf(body, body_offset, body->len - body_offset,
- spkm3_checksummer, &desc);
- crypto_hash_final(&desc, cksum->data);
-
-out:
- crypto_free_hash(desc.tfm);
-
- return err ? GSS_S_FAILURE : 0;
-}
+++ /dev/null
-/*
- * linux/net/sunrpc/gss_spkm3_token.c
- *
- * Copyright (c) 2003 The Regents of the University of Michigan.
- * All rights reserved.
- *
- * Andy Adamson <andros@umich.edu>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/sunrpc/gss_spkm3.h>
-#include <linux/random.h>
-#include <linux/crypto.h>
-
-#ifdef RPC_DEBUG
-# define RPCDBG_FACILITY RPCDBG_AUTH
-#endif
-
-/*
- * asn1_bitstring_len()
- *
- * calculate the asn1 bitstring length of the xdr_netobject
- */
-void
-asn1_bitstring_len(struct xdr_netobj *in, int *enclen, int *zerobits)
-{
- int i, zbit = 0,elen = in->len;
- char *ptr;
-
- ptr = &in->data[in->len -1];
-
- /* count trailing 0's */
- for(i = in->len; i > 0; i--) {
- if (*ptr == 0) {
- ptr--;
- elen--;
- } else
- break;
- }
-
- /* count number of 0 bits in final octet */
- ptr = &in->data[elen - 1];
- for(i = 0; i < 8; i++) {
- short mask = 0x01;
-
- if (!((mask << i) & *ptr))
- zbit++;
- else
- break;
- }
- *enclen = elen;
- *zerobits = zbit;
-}
-
-/*
- * decode_asn1_bitstring()
- *
- * decode a bitstring into a buffer of the expected length.
- * enclen = bit string length
- * explen = expected length (define in rfc)
- */
-int
-decode_asn1_bitstring(struct xdr_netobj *out, char *in, int enclen, int explen)
-{
- if (!(out->data = kzalloc(explen,GFP_NOFS)))
- return 0;
- out->len = explen;
- memcpy(out->data, in, enclen);
- return 1;
-}
-
-/*
- * SPKMInnerContextToken choice SPKM_MIC asn1 token layout
- *
- * contextid is always 16 bytes plain data. max asn1 bitstring len = 17.
- *
- * tokenlen = pos[0] to end of token (max pos[45] with MD5 cksum)
- *
- * pos value
- * ----------
- * [0] a4 SPKM-MIC tag
- * [1] ?? innertoken length (max 44)
- *
- *
- * tok_hdr piece of checksum data starts here
- *
- * the maximum mic-header len = 9 + 17 = 26
- * mic-header
- * ----------
- * [2] 30 SEQUENCE tag
- * [3] ?? mic-header length: (max 23) = TokenID + ContextID
- *
- * TokenID - all fields constant and can be hardcoded
- * -------
- * [4] 02 Type 2
- * [5] 02 Length 2
- * [6][7] 01 01 TokenID (SPKM_MIC_TOK)
- *
- * ContextID - encoded length not constant, calculated
- * ---------
- * [8] 03 Type 3
- * [9] ?? encoded length
- * [10] ?? ctxzbit
- * [11] contextid
- *
- * mic_header piece of checksum data ends here.
- *
- * int-cksum - encoded length not constant, calculated
- * ---------
- * [??] 03 Type 3
- * [??] ?? encoded length
- * [??] ?? md5zbit
- * [??] int-cksum (NID_md5 = 16)
- *
- * maximum SPKM-MIC innercontext token length =
- * 10 + encoded contextid_size(17 max) + 2 + encoded
- * cksum_size (17 maxfor NID_md5) = 46
- */
-
-/*
- * spkm3_mic_header()
- *
- * Prepare the SPKM_MIC_TOK mic-header for check-sum calculation
- * elen: 16 byte context id asn1 bitstring encoded length
- */
-void
-spkm3_mic_header(unsigned char **hdrbuf, unsigned int *hdrlen, unsigned char *ctxdata, int elen, int zbit)
-{
- char *hptr = *hdrbuf;
- char *top = *hdrbuf;
-
- *(u8 *)hptr++ = 0x30;
- *(u8 *)hptr++ = elen + 7; /* on the wire header length */
-
- /* tokenid */
- *(u8 *)hptr++ = 0x02;
- *(u8 *)hptr++ = 0x02;
- *(u8 *)hptr++ = 0x01;
- *(u8 *)hptr++ = 0x01;
-
- /* coniextid */
- *(u8 *)hptr++ = 0x03;
- *(u8 *)hptr++ = elen + 1; /* add 1 to include zbit */
- *(u8 *)hptr++ = zbit;
- memcpy(hptr, ctxdata, elen);
- hptr += elen;
- *hdrlen = hptr - top;
-}
-
-/*
- * spkm3_mic_innercontext_token()
- *
- * *tokp points to the beginning of the SPKM_MIC token described
- * in rfc 2025, section 3.2.1:
- *
- * toklen is the inner token length
- */
-void
-spkm3_make_mic_token(unsigned char **tokp, int toklen, struct xdr_netobj *mic_hdr, struct xdr_netobj *md5cksum, int md5elen, int md5zbit)
-{
- unsigned char *ict = *tokp;
-
- *(u8 *)ict++ = 0xa4;
- *(u8 *)ict++ = toklen;
- memcpy(ict, mic_hdr->data, mic_hdr->len);
- ict += mic_hdr->len;
-
- *(u8 *)ict++ = 0x03;
- *(u8 *)ict++ = md5elen + 1; /* add 1 to include zbit */
- *(u8 *)ict++ = md5zbit;
- memcpy(ict, md5cksum->data, md5elen);
-}
-
-u32
-spkm3_verify_mic_token(unsigned char **tokp, int *mic_hdrlen, unsigned char **cksum)
-{
- struct xdr_netobj spkm3_ctx_id = {.len =0, .data = NULL};
- unsigned char *ptr = *tokp;
- int ctxelen;
- u32 ret = GSS_S_DEFECTIVE_TOKEN;
-
- /* spkm3 innercontext token preamble */
- if ((ptr[0] != 0xa4) || (ptr[2] != 0x30)) {
- dprintk("RPC: BAD SPKM ictoken preamble\n");
- goto out;
- }
-
- *mic_hdrlen = ptr[3];
-
- /* token type */
- if ((ptr[4] != 0x02) || (ptr[5] != 0x02)) {
- dprintk("RPC: BAD asn1 SPKM3 token type\n");
- goto out;
- }
-
- /* only support SPKM_MIC_TOK */
- if((ptr[6] != 0x01) || (ptr[7] != 0x01)) {
- dprintk("RPC: ERROR unsupported SPKM3 token\n");
- goto out;
- }
-
- /* contextid */
- if (ptr[8] != 0x03) {
- dprintk("RPC: BAD SPKM3 asn1 context-id type\n");
- goto out;
- }
-
- ctxelen = ptr[9];
- if (ctxelen > 17) { /* length includes asn1 zbit octet */
- dprintk("RPC: BAD SPKM3 contextid len %d\n", ctxelen);
- goto out;
- }
-
- /* ignore ptr[10] */
-
- if(!decode_asn1_bitstring(&spkm3_ctx_id, &ptr[11], ctxelen - 1, 16))
- goto out;
-
- /*
- * in the current implementation: the optional int-alg is not present
- * so the default int-alg (md5) is used the optional snd-seq field is
- * also not present
- */
-
- if (*mic_hdrlen != 6 + ctxelen) {
- dprintk("RPC: BAD SPKM_ MIC_TOK header len %d: we only "
- "support default int-alg (should be absent) "
- "and do not support snd-seq\n", *mic_hdrlen);
- goto out;
- }
- /* checksum */
- *cksum = (&ptr[10] + ctxelen); /* ctxelen includes ptr[10] */
-
- ret = GSS_S_COMPLETE;
-out:
- kfree(spkm3_ctx_id.data);
- return ret;
-}
-
+++ /dev/null
-/*
- * linux/net/sunrpc/gss_spkm3_unseal.c
- *
- * Copyright (c) 2003 The Regents of the University of Michigan.
- * All rights reserved.
- *
- * Andy Adamson <andros@umich.edu>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/sunrpc/gss_spkm3.h>
-#include <linux/crypto.h>
-
-#ifdef RPC_DEBUG
-# define RPCDBG_FACILITY RPCDBG_AUTH
-#endif
-
-/*
- * spkm3_read_token()
- *
- * only SPKM_MIC_TOK with md5 intg-alg is supported
- */
-u32
-spkm3_read_token(struct spkm3_ctx *ctx,
- struct xdr_netobj *read_token, /* checksum */
- struct xdr_buf *message_buffer, /* signbuf */
- int toktype)
-{
- s32 checksum_type;
- s32 code;
- struct xdr_netobj wire_cksum = {.len =0, .data = NULL};
- char cksumdata[16];
- struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
- unsigned char *ptr = (unsigned char *)read_token->data;
- unsigned char *cksum;
- int bodysize, md5elen;
- int mic_hdrlen;
- u32 ret = GSS_S_DEFECTIVE_TOKEN;
-
- if (g_verify_token_header((struct xdr_netobj *) &ctx->mech_used,
- &bodysize, &ptr, read_token->len))
- goto out;
-
- /* decode the token */
-
- if (toktype != SPKM_MIC_TOK) {
- dprintk("RPC: BAD SPKM3 token type: %d\n", toktype);
- goto out;
- }
-
- if ((ret = spkm3_verify_mic_token(&ptr, &mic_hdrlen, &cksum)))
- goto out;
-
- if (*cksum++ != 0x03) {
- dprintk("RPC: spkm3_read_token BAD checksum type\n");
- goto out;
- }
- md5elen = *cksum++;
- cksum++; /* move past the zbit */
-
- if (!decode_asn1_bitstring(&wire_cksum, cksum, md5elen - 1, 16))
- goto out;
-
- /* HARD CODED FOR MD5 */
-
- /* compute the checksum of the message.
- * ptr + 2 = start of header piece of checksum
- * mic_hdrlen + 2 = length of header piece of checksum
- */
- ret = GSS_S_DEFECTIVE_TOKEN;
- if (!g_OID_equal(&ctx->intg_alg, &hmac_md5_oid)) {
- dprintk("RPC: gss_spkm3_seal: unsupported I-ALG "
- "algorithm\n");
- goto out;
- }
-
- checksum_type = CKSUMTYPE_HMAC_MD5;
-
- code = make_spkm3_checksum(checksum_type,
- &ctx->derived_integ_key, ptr + 2, mic_hdrlen + 2,
- message_buffer, 0, &md5cksum);
-
- if (code)
- goto out;
-
- ret = GSS_S_BAD_SIG;
- code = memcmp(md5cksum.data, wire_cksum.data, wire_cksum.len);
- if (code) {
- dprintk("RPC: bad MIC checksum\n");
- goto out;
- }
-
-
- /* XXX: need to add expiration and sequencing */
- ret = GSS_S_COMPLETE;
-out:
- kfree(wire_cksum.data);
- return ret;
-}
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff