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authorJ. Bruce Fields <bfields@redhat.com>2010-10-01 15:40:01 -0400
committerJ. Bruce Fields <bfields@redhat.com>2010-10-01 18:09:55 -0400
commit1e7af1b8062598a038c04dfaaabd038a0d6e8b6a (patch)
tree2e171464ff365c4322d30a0d2fed106c74feecdd /net/sunrpc
parent277f68dbba397997c7f3dc843d14afa1654bb80e (diff)
nfsd4: remove spkm3
Unfortunately, spkm3 never got very far; while interoperability with one other implementation was demonstrated at some point, problems were found with the spec that were deemed not worth fixing. The kernel code is useless on its own without nfs-utils patches which were never merged into nfs-utils, and were only ever available from citi.umich.edu. They appear not to have been updated since 2005. Therefore it seems safe to assume that this code has no users, and never will. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/Kconfig19
-rw-r--r--net/sunrpc/auth_gss/Makefile5
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_mech.c247
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_seal.c186
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_token.c267
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_unseal.c127
6 files changed, 0 insertions, 851 deletions
diff --git a/net/sunrpc/Kconfig b/net/sunrpc/Kconfig
index 3376d7657185..8873fd8ddacd 100644
--- a/net/sunrpc/Kconfig
+++ b/net/sunrpc/Kconfig
@@ -36,22 +36,3 @@ config RPCSEC_GSS_KRB5
36 Kerberos support should be installed. 36 Kerberos support should be installed.
37 37
38 If unsure, say Y. 38 If unsure, say Y.
39
40config RPCSEC_GSS_SPKM3
41 tristate "Secure RPC: SPKM3 mechanism (EXPERIMENTAL)"
42 depends on SUNRPC && EXPERIMENTAL
43 select SUNRPC_GSS
44 select CRYPTO
45 select CRYPTO_MD5
46 select CRYPTO_DES
47 select CRYPTO_CAST5
48 select CRYPTO_CBC
49 help
50 Choose Y here to enable Secure RPC using the SPKM3 public key
51 GSS-API mechanism (RFC 2025).
52
53 Secure RPC calls with SPKM3 require an auxiliary userspace
54 daemon which may be found in the Linux nfs-utils package
55 available from http://linux-nfs.org/.
56
57 If unsure, say N.
diff --git a/net/sunrpc/auth_gss/Makefile b/net/sunrpc/auth_gss/Makefile
index 74a231735f67..7350d86a32ee 100644
--- a/net/sunrpc/auth_gss/Makefile
+++ b/net/sunrpc/auth_gss/Makefile
@@ -11,8 +11,3 @@ obj-$(CONFIG_RPCSEC_GSS_KRB5) += rpcsec_gss_krb5.o
11 11
12rpcsec_gss_krb5-objs := gss_krb5_mech.o gss_krb5_seal.o gss_krb5_unseal.o \ 12rpcsec_gss_krb5-objs := gss_krb5_mech.o gss_krb5_seal.o gss_krb5_unseal.o \
13 gss_krb5_seqnum.o gss_krb5_wrap.o gss_krb5_crypto.o gss_krb5_keys.o 13 gss_krb5_seqnum.o gss_krb5_wrap.o gss_krb5_crypto.o gss_krb5_keys.o
14
15obj-$(CONFIG_RPCSEC_GSS_SPKM3) += rpcsec_gss_spkm3.o
16
17rpcsec_gss_spkm3-objs := gss_spkm3_mech.o gss_spkm3_seal.o gss_spkm3_unseal.o \
18 gss_spkm3_token.o
diff --git a/net/sunrpc/auth_gss/gss_spkm3_mech.c b/net/sunrpc/auth_gss/gss_spkm3_mech.c
deleted file mode 100644
index adade3d313f2..000000000000
--- a/net/sunrpc/auth_gss/gss_spkm3_mech.c
+++ /dev/null
@@ -1,247 +0,0 @@
1/*
2 * linux/net/sunrpc/gss_spkm3_mech.c
3 *
4 * Copyright (c) 2003 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Andy Adamson <andros@umich.edu>
8 * J. Bruce Fields <bfields@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 */
36
37#include <linux/err.h>
38#include <linux/module.h>
39#include <linux/init.h>
40#include <linux/types.h>
41#include <linux/slab.h>
42#include <linux/sunrpc/auth.h>
43#include <linux/in.h>
44#include <linux/sunrpc/svcauth_gss.h>
45#include <linux/sunrpc/gss_spkm3.h>
46#include <linux/sunrpc/xdr.h>
47#include <linux/crypto.h>
48
49#ifdef RPC_DEBUG
50# define RPCDBG_FACILITY RPCDBG_AUTH
51#endif
52
53static const void *
54simple_get_bytes(const void *p, const void *end, void *res, int len)
55{
56 const void *q = (const void *)((const char *)p + len);
57 if (unlikely(q > end || q < p))
58 return ERR_PTR(-EFAULT);
59 memcpy(res, p, len);
60 return q;
61}
62
63static const void *
64simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
65{
66 const void *q;
67 unsigned int len;
68 p = simple_get_bytes(p, end, &len, sizeof(len));
69 if (IS_ERR(p))
70 return p;
71 res->len = len;
72 if (len == 0) {
73 res->data = NULL;
74 return p;
75 }
76 q = (const void *)((const char *)p + len);
77 if (unlikely(q > end || q < p))
78 return ERR_PTR(-EFAULT);
79 res->data = kmemdup(p, len, GFP_NOFS);
80 if (unlikely(res->data == NULL))
81 return ERR_PTR(-ENOMEM);
82 return q;
83}
84
85static int
86gss_import_sec_context_spkm3(const void *p, size_t len,
87 struct gss_ctx *ctx_id,
88 gfp_t gfp_mask)
89{
90 const void *end = (const void *)((const char *)p + len);
91 struct spkm3_ctx *ctx;
92 int version;
93
94 if (!(ctx = kzalloc(sizeof(*ctx), gfp_mask)))
95 goto out_err;
96
97 p = simple_get_bytes(p, end, &version, sizeof(version));
98 if (IS_ERR(p))
99 goto out_err_free_ctx;
100 if (version != 1) {
101 dprintk("RPC: unknown spkm3 token format: "
102 "obsolete nfs-utils?\n");
103 p = ERR_PTR(-EINVAL);
104 goto out_err_free_ctx;
105 }
106
107 p = simple_get_netobj(p, end, &ctx->ctx_id);
108 if (IS_ERR(p))
109 goto out_err_free_ctx;
110
111 p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
112 if (IS_ERR(p))
113 goto out_err_free_ctx_id;
114
115 p = simple_get_netobj(p, end, &ctx->mech_used);
116 if (IS_ERR(p))
117 goto out_err_free_ctx_id;
118
119 p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
120 if (IS_ERR(p))
121 goto out_err_free_mech;
122
123 p = simple_get_netobj(p, end, &ctx->conf_alg);
124 if (IS_ERR(p))
125 goto out_err_free_mech;
126
127 p = simple_get_netobj(p, end, &ctx->derived_conf_key);
128 if (IS_ERR(p))
129 goto out_err_free_conf_alg;
130
131 p = simple_get_netobj(p, end, &ctx->intg_alg);
132 if (IS_ERR(p))
133 goto out_err_free_conf_key;
134
135 p = simple_get_netobj(p, end, &ctx->derived_integ_key);
136 if (IS_ERR(p))
137 goto out_err_free_intg_alg;
138
139 if (p != end) {
140 p = ERR_PTR(-EFAULT);
141 goto out_err_free_intg_key;
142 }
143
144 ctx_id->internal_ctx_id = ctx;
145
146 dprintk("RPC: Successfully imported new spkm context.\n");
147 return 0;
148
149out_err_free_intg_key:
150 kfree(ctx->derived_integ_key.data);
151out_err_free_intg_alg:
152 kfree(ctx->intg_alg.data);
153out_err_free_conf_key:
154 kfree(ctx->derived_conf_key.data);
155out_err_free_conf_alg:
156 kfree(ctx->conf_alg.data);
157out_err_free_mech:
158 kfree(ctx->mech_used.data);
159out_err_free_ctx_id:
160 kfree(ctx->ctx_id.data);
161out_err_free_ctx:
162 kfree(ctx);
163out_err:
164 return PTR_ERR(p);
165}
166
167static void
168gss_delete_sec_context_spkm3(void *internal_ctx)
169{
170 struct spkm3_ctx *sctx = internal_ctx;
171
172 kfree(sctx->derived_integ_key.data);
173 kfree(sctx->intg_alg.data);
174 kfree(sctx->derived_conf_key.data);
175 kfree(sctx->conf_alg.data);
176 kfree(sctx->mech_used.data);
177 kfree(sctx->ctx_id.data);
178 kfree(sctx);
179}
180
181static u32
182gss_verify_mic_spkm3(struct gss_ctx *ctx,
183 struct xdr_buf *signbuf,
184 struct xdr_netobj *checksum)
185{
186 u32 maj_stat = 0;
187 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
188
189 maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK);
190
191 dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
192 return maj_stat;
193}
194
195static u32
196gss_get_mic_spkm3(struct gss_ctx *ctx,
197 struct xdr_buf *message_buffer,
198 struct xdr_netobj *message_token)
199{
200 u32 err = 0;
201 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
202
203 err = spkm3_make_token(sctx, message_buffer,
204 message_token, SPKM_MIC_TOK);
205 dprintk("RPC: gss_get_mic_spkm3 returning %d\n", err);
206 return err;
207}
208
209static const struct gss_api_ops gss_spkm3_ops = {
210 .gss_import_sec_context = gss_import_sec_context_spkm3,
211 .gss_get_mic = gss_get_mic_spkm3,
212 .gss_verify_mic = gss_verify_mic_spkm3,
213 .gss_delete_sec_context = gss_delete_sec_context_spkm3,
214};
215
216static struct pf_desc gss_spkm3_pfs[] = {
217 {RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"},
218 {RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
219};
220
221static struct gss_api_mech gss_spkm3_mech = {
222 .gm_name = "spkm3",
223 .gm_owner = THIS_MODULE,
224 .gm_oid = {7, "\053\006\001\005\005\001\003"},
225 .gm_ops = &gss_spkm3_ops,
226 .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
227 .gm_pfs = gss_spkm3_pfs,
228};
229
230static int __init init_spkm3_module(void)
231{
232 int status;
233
234 status = gss_mech_register(&gss_spkm3_mech);
235 if (status)
236 printk("Failed to register spkm3 gss mechanism!\n");
237 return status;
238}
239
240static void __exit cleanup_spkm3_module(void)
241{
242 gss_mech_unregister(&gss_spkm3_mech);
243}
244
245MODULE_LICENSE("GPL");
246module_init(init_spkm3_module);
247module_exit(cleanup_spkm3_module);
diff --git a/net/sunrpc/auth_gss/gss_spkm3_seal.c b/net/sunrpc/auth_gss/gss_spkm3_seal.c
deleted file mode 100644
index 5a3a65a0e2b4..000000000000
--- a/net/sunrpc/auth_gss/gss_spkm3_seal.c
+++ /dev/null
@@ -1,186 +0,0 @@
1/*
2 * linux/net/sunrpc/gss_spkm3_seal.c
3 *
4 * Copyright (c) 2003 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Andy Adamson <andros@umich.edu>
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 */
35
36#include <linux/types.h>
37#include <linux/jiffies.h>
38#include <linux/sunrpc/gss_spkm3.h>
39#include <linux/random.h>
40#include <linux/crypto.h>
41#include <linux/pagemap.h>
42#include <linux/scatterlist.h>
43#include <linux/sunrpc/xdr.h>
44
45#ifdef RPC_DEBUG
46# define RPCDBG_FACILITY RPCDBG_AUTH
47#endif
48
49const struct xdr_netobj hmac_md5_oid = { 8, "\x2B\x06\x01\x05\x05\x08\x01\x01"};
50const struct xdr_netobj cast5_cbc_oid = {9, "\x2A\x86\x48\x86\xF6\x7D\x07\x42\x0A"};
51
52/*
53 * spkm3_make_token()
54 *
55 * Only SPKM_MIC_TOK with md5 intg-alg is supported
56 */
57
58u32
59spkm3_make_token(struct spkm3_ctx *ctx,
60 struct xdr_buf * text, struct xdr_netobj * token,
61 int toktype)
62{
63 s32 checksum_type;
64 char tokhdrbuf[25];
65 char cksumdata[16];
66 struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
67 struct xdr_netobj mic_hdr = {.len = 0, .data = tokhdrbuf};
68 int tokenlen = 0;
69 unsigned char *ptr;
70 s32 now;
71 int ctxelen = 0, ctxzbit = 0;
72 int md5elen = 0, md5zbit = 0;
73
74 now = jiffies;
75
76 if (ctx->ctx_id.len != 16) {
77 dprintk("RPC: spkm3_make_token BAD ctx_id.len %d\n",
78 ctx->ctx_id.len);
79 goto out_err;
80 }
81
82 if (!g_OID_equal(&ctx->intg_alg, &hmac_md5_oid)) {
83 dprintk("RPC: gss_spkm3_seal: unsupported I-ALG "
84 "algorithm. only support hmac-md5 I-ALG.\n");
85 goto out_err;
86 } else
87 checksum_type = CKSUMTYPE_HMAC_MD5;
88
89 if (!g_OID_equal(&ctx->conf_alg, &cast5_cbc_oid)) {
90 dprintk("RPC: gss_spkm3_seal: unsupported C-ALG "
91 "algorithm\n");
92 goto out_err;
93 }
94
95 if (toktype == SPKM_MIC_TOK) {
96 /* Calculate checksum over the mic-header */
97 asn1_bitstring_len(&ctx->ctx_id, &ctxelen, &ctxzbit);
98 spkm3_mic_header(&mic_hdr.data, &mic_hdr.len, ctx->ctx_id.data,
99 ctxelen, ctxzbit);
100 if (make_spkm3_checksum(checksum_type, &ctx->derived_integ_key,
101 (char *)mic_hdr.data, mic_hdr.len,
102 text, 0, &md5cksum))
103 goto out_err;
104
105 asn1_bitstring_len(&md5cksum, &md5elen, &md5zbit);
106 tokenlen = 10 + ctxelen + 1 + md5elen + 1;
107
108 /* Create token header using generic routines */
109 token->len = g_token_size(&ctx->mech_used, tokenlen + 2);
110
111 ptr = token->data;
112 g_make_token_header(&ctx->mech_used, tokenlen + 2, &ptr);
113
114 spkm3_make_mic_token(&ptr, tokenlen, &mic_hdr, &md5cksum, md5elen, md5zbit);
115 } else if (toktype == SPKM_WRAP_TOK) { /* Not Supported */
116 dprintk("RPC: gss_spkm3_seal: SPKM_WRAP_TOK "
117 "not supported\n");
118 goto out_err;
119 }
120
121 /* XXX need to implement sequence numbers, and ctx->expired */
122
123 return GSS_S_COMPLETE;
124out_err:
125 token->data = NULL;
126 token->len = 0;
127 return GSS_S_FAILURE;
128}
129
130static int
131spkm3_checksummer(struct scatterlist *sg, void *data)
132{
133 struct hash_desc *desc = data;
134
135 return crypto_hash_update(desc, sg, sg->length);
136}
137
138/* checksum the plaintext data and hdrlen bytes of the token header */
139s32
140make_spkm3_checksum(s32 cksumtype, struct xdr_netobj *key, char *header,
141 unsigned int hdrlen, struct xdr_buf *body,
142 unsigned int body_offset, struct xdr_netobj *cksum)
143{
144 char *cksumname;
145 struct hash_desc desc; /* XXX add to ctx? */
146 struct scatterlist sg[1];
147 int err;
148
149 switch (cksumtype) {
150 case CKSUMTYPE_HMAC_MD5:
151 cksumname = "hmac(md5)";
152 break;
153 default:
154 dprintk("RPC: spkm3_make_checksum:"
155 " unsupported checksum %d", cksumtype);
156 return GSS_S_FAILURE;
157 }
158
159 if (key->data == NULL || key->len <= 0) return GSS_S_FAILURE;
160
161 desc.tfm = crypto_alloc_hash(cksumname, 0, CRYPTO_ALG_ASYNC);
162 if (IS_ERR(desc.tfm))
163 return GSS_S_FAILURE;
164 cksum->len = crypto_hash_digestsize(desc.tfm);
165 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
166
167 err = crypto_hash_setkey(desc.tfm, key->data, key->len);
168 if (err)
169 goto out;
170
171 err = crypto_hash_init(&desc);
172 if (err)
173 goto out;
174
175 sg_init_one(sg, header, hdrlen);
176 crypto_hash_update(&desc, sg, sg->length);
177
178 xdr_process_buf(body, body_offset, body->len - body_offset,
179 spkm3_checksummer, &desc);
180 crypto_hash_final(&desc, cksum->data);
181
182out:
183 crypto_free_hash(desc.tfm);
184
185 return err ? GSS_S_FAILURE : 0;
186}
diff --git a/net/sunrpc/auth_gss/gss_spkm3_token.c b/net/sunrpc/auth_gss/gss_spkm3_token.c
deleted file mode 100644
index a99825d7caa0..000000000000
--- a/net/sunrpc/auth_gss/gss_spkm3_token.c
+++ /dev/null
@@ -1,267 +0,0 @@
1/*
2 * linux/net/sunrpc/gss_spkm3_token.c
3 *
4 * Copyright (c) 2003 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Andy Adamson <andros@umich.edu>
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 */
35
36#include <linux/types.h>
37#include <linux/slab.h>
38#include <linux/jiffies.h>
39#include <linux/sunrpc/gss_spkm3.h>
40#include <linux/random.h>
41#include <linux/crypto.h>
42
43#ifdef RPC_DEBUG
44# define RPCDBG_FACILITY RPCDBG_AUTH
45#endif
46
47/*
48 * asn1_bitstring_len()
49 *
50 * calculate the asn1 bitstring length of the xdr_netobject
51 */
52void
53asn1_bitstring_len(struct xdr_netobj *in, int *enclen, int *zerobits)
54{
55 int i, zbit = 0,elen = in->len;
56 char *ptr;
57
58 ptr = &in->data[in->len -1];
59
60 /* count trailing 0's */
61 for(i = in->len; i > 0; i--) {
62 if (*ptr == 0) {
63 ptr--;
64 elen--;
65 } else
66 break;
67 }
68
69 /* count number of 0 bits in final octet */
70 ptr = &in->data[elen - 1];
71 for(i = 0; i < 8; i++) {
72 short mask = 0x01;
73
74 if (!((mask << i) & *ptr))
75 zbit++;
76 else
77 break;
78 }
79 *enclen = elen;
80 *zerobits = zbit;
81}
82
83/*
84 * decode_asn1_bitstring()
85 *
86 * decode a bitstring into a buffer of the expected length.
87 * enclen = bit string length
88 * explen = expected length (define in rfc)
89 */
90int
91decode_asn1_bitstring(struct xdr_netobj *out, char *in, int enclen, int explen)
92{
93 if (!(out->data = kzalloc(explen,GFP_NOFS)))
94 return 0;
95 out->len = explen;
96 memcpy(out->data, in, enclen);
97 return 1;
98}
99
100/*
101 * SPKMInnerContextToken choice SPKM_MIC asn1 token layout
102 *
103 * contextid is always 16 bytes plain data. max asn1 bitstring len = 17.
104 *
105 * tokenlen = pos[0] to end of token (max pos[45] with MD5 cksum)
106 *
107 * pos value
108 * ----------
109 * [0] a4 SPKM-MIC tag
110 * [1] ?? innertoken length (max 44)
111 *
112 *
113 * tok_hdr piece of checksum data starts here
114 *
115 * the maximum mic-header len = 9 + 17 = 26
116 * mic-header
117 * ----------
118 * [2] 30 SEQUENCE tag
119 * [3] ?? mic-header length: (max 23) = TokenID + ContextID
120 *
121 * TokenID - all fields constant and can be hardcoded
122 * -------
123 * [4] 02 Type 2
124 * [5] 02 Length 2
125 * [6][7] 01 01 TokenID (SPKM_MIC_TOK)
126 *
127 * ContextID - encoded length not constant, calculated
128 * ---------
129 * [8] 03 Type 3
130 * [9] ?? encoded length
131 * [10] ?? ctxzbit
132 * [11] contextid
133 *
134 * mic_header piece of checksum data ends here.
135 *
136 * int-cksum - encoded length not constant, calculated
137 * ---------
138 * [??] 03 Type 3
139 * [??] ?? encoded length
140 * [??] ?? md5zbit
141 * [??] int-cksum (NID_md5 = 16)
142 *
143 * maximum SPKM-MIC innercontext token length =
144 * 10 + encoded contextid_size(17 max) + 2 + encoded
145 * cksum_size (17 maxfor NID_md5) = 46
146 */
147
148/*
149 * spkm3_mic_header()
150 *
151 * Prepare the SPKM_MIC_TOK mic-header for check-sum calculation
152 * elen: 16 byte context id asn1 bitstring encoded length
153 */
154void
155spkm3_mic_header(unsigned char **hdrbuf, unsigned int *hdrlen, unsigned char *ctxdata, int elen, int zbit)
156{
157 char *hptr = *hdrbuf;
158 char *top = *hdrbuf;
159
160 *(u8 *)hptr++ = 0x30;
161 *(u8 *)hptr++ = elen + 7; /* on the wire header length */
162
163 /* tokenid */
164 *(u8 *)hptr++ = 0x02;
165 *(u8 *)hptr++ = 0x02;
166 *(u8 *)hptr++ = 0x01;
167 *(u8 *)hptr++ = 0x01;
168
169 /* coniextid */
170 *(u8 *)hptr++ = 0x03;
171 *(u8 *)hptr++ = elen + 1; /* add 1 to include zbit */
172 *(u8 *)hptr++ = zbit;
173 memcpy(hptr, ctxdata, elen);
174 hptr += elen;
175 *hdrlen = hptr - top;
176}
177
178/*
179 * spkm3_mic_innercontext_token()
180 *
181 * *tokp points to the beginning of the SPKM_MIC token described
182 * in rfc 2025, section 3.2.1:
183 *
184 * toklen is the inner token length
185 */
186void
187spkm3_make_mic_token(unsigned char **tokp, int toklen, struct xdr_netobj *mic_hdr, struct xdr_netobj *md5cksum, int md5elen, int md5zbit)
188{
189 unsigned char *ict = *tokp;
190
191 *(u8 *)ict++ = 0xa4;
192 *(u8 *)ict++ = toklen;
193 memcpy(ict, mic_hdr->data, mic_hdr->len);
194 ict += mic_hdr->len;
195
196 *(u8 *)ict++ = 0x03;
197 *(u8 *)ict++ = md5elen + 1; /* add 1 to include zbit */
198 *(u8 *)ict++ = md5zbit;
199 memcpy(ict, md5cksum->data, md5elen);
200}
201
202u32
203spkm3_verify_mic_token(unsigned char **tokp, int *mic_hdrlen, unsigned char **cksum)
204{
205 struct xdr_netobj spkm3_ctx_id = {.len =0, .data = NULL};
206 unsigned char *ptr = *tokp;
207 int ctxelen;
208 u32 ret = GSS_S_DEFECTIVE_TOKEN;
209
210 /* spkm3 innercontext token preamble */
211 if ((ptr[0] != 0xa4) || (ptr[2] != 0x30)) {
212 dprintk("RPC: BAD SPKM ictoken preamble\n");
213 goto out;
214 }
215
216 *mic_hdrlen = ptr[3];
217
218 /* token type */
219 if ((ptr[4] != 0x02) || (ptr[5] != 0x02)) {
220 dprintk("RPC: BAD asn1 SPKM3 token type\n");
221 goto out;
222 }
223
224 /* only support SPKM_MIC_TOK */
225 if((ptr[6] != 0x01) || (ptr[7] != 0x01)) {
226 dprintk("RPC: ERROR unsupported SPKM3 token\n");
227 goto out;
228 }
229
230 /* contextid */
231 if (ptr[8] != 0x03) {
232 dprintk("RPC: BAD SPKM3 asn1 context-id type\n");
233 goto out;
234 }
235
236 ctxelen = ptr[9];
237 if (ctxelen > 17) { /* length includes asn1 zbit octet */
238 dprintk("RPC: BAD SPKM3 contextid len %d\n", ctxelen);
239 goto out;
240 }
241
242 /* ignore ptr[10] */
243
244 if(!decode_asn1_bitstring(&spkm3_ctx_id, &ptr[11], ctxelen - 1, 16))
245 goto out;
246
247 /*
248 * in the current implementation: the optional int-alg is not present
249 * so the default int-alg (md5) is used the optional snd-seq field is
250 * also not present
251 */
252
253 if (*mic_hdrlen != 6 + ctxelen) {
254 dprintk("RPC: BAD SPKM_ MIC_TOK header len %d: we only "
255 "support default int-alg (should be absent) "
256 "and do not support snd-seq\n", *mic_hdrlen);
257 goto out;
258 }
259 /* checksum */
260 *cksum = (&ptr[10] + ctxelen); /* ctxelen includes ptr[10] */
261
262 ret = GSS_S_COMPLETE;
263out:
264 kfree(spkm3_ctx_id.data);
265 return ret;
266}
267
diff --git a/net/sunrpc/auth_gss/gss_spkm3_unseal.c b/net/sunrpc/auth_gss/gss_spkm3_unseal.c
deleted file mode 100644
index cc21ee860bb6..000000000000
--- a/net/sunrpc/auth_gss/gss_spkm3_unseal.c
+++ /dev/null
@@ -1,127 +0,0 @@
1/*
2 * linux/net/sunrpc/gss_spkm3_unseal.c
3 *
4 * Copyright (c) 2003 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Andy Adamson <andros@umich.edu>
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 */
35
36#include <linux/types.h>
37#include <linux/slab.h>
38#include <linux/jiffies.h>
39#include <linux/sunrpc/gss_spkm3.h>
40#include <linux/crypto.h>
41
42#ifdef RPC_DEBUG
43# define RPCDBG_FACILITY RPCDBG_AUTH
44#endif
45
46/*
47 * spkm3_read_token()
48 *
49 * only SPKM_MIC_TOK with md5 intg-alg is supported
50 */
51u32
52spkm3_read_token(struct spkm3_ctx *ctx,
53 struct xdr_netobj *read_token, /* checksum */
54 struct xdr_buf *message_buffer, /* signbuf */
55 int toktype)
56{
57 s32 checksum_type;
58 s32 code;
59 struct xdr_netobj wire_cksum = {.len =0, .data = NULL};
60 char cksumdata[16];
61 struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
62 unsigned char *ptr = (unsigned char *)read_token->data;
63 unsigned char *cksum;
64 int bodysize, md5elen;
65 int mic_hdrlen;
66 u32 ret = GSS_S_DEFECTIVE_TOKEN;
67
68 if (g_verify_token_header((struct xdr_netobj *) &ctx->mech_used,
69 &bodysize, &ptr, read_token->len))
70 goto out;
71
72 /* decode the token */
73
74 if (toktype != SPKM_MIC_TOK) {
75 dprintk("RPC: BAD SPKM3 token type: %d\n", toktype);
76 goto out;
77 }
78
79 if ((ret = spkm3_verify_mic_token(&ptr, &mic_hdrlen, &cksum)))
80 goto out;
81
82 if (*cksum++ != 0x03) {
83 dprintk("RPC: spkm3_read_token BAD checksum type\n");
84 goto out;
85 }
86 md5elen = *cksum++;
87 cksum++; /* move past the zbit */
88
89 if (!decode_asn1_bitstring(&wire_cksum, cksum, md5elen - 1, 16))
90 goto out;
91
92 /* HARD CODED FOR MD5 */
93
94 /* compute the checksum of the message.
95 * ptr + 2 = start of header piece of checksum
96 * mic_hdrlen + 2 = length of header piece of checksum
97 */
98 ret = GSS_S_DEFECTIVE_TOKEN;
99 if (!g_OID_equal(&ctx->intg_alg, &hmac_md5_oid)) {
100 dprintk("RPC: gss_spkm3_seal: unsupported I-ALG "
101 "algorithm\n");
102 goto out;
103 }
104
105 checksum_type = CKSUMTYPE_HMAC_MD5;
106
107 code = make_spkm3_checksum(checksum_type,
108 &ctx->derived_integ_key, ptr + 2, mic_hdrlen + 2,
109 message_buffer, 0, &md5cksum);
110
111 if (code)
112 goto out;
113
114 ret = GSS_S_BAD_SIG;
115 code = memcmp(md5cksum.data, wire_cksum.data, wire_cksum.len);
116 if (code) {
117 dprintk("RPC: bad MIC checksum\n");
118 goto out;
119 }
120
121
122 /* XXX: need to add expiration and sequencing */
123 ret = GSS_S_COMPLETE;
124out:
125 kfree(wire_cksum.data);
126 return ret;
127}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-29 09:14:44 -0500