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Diffstat (limited to 'net/sunrpc/auth_gss/gss_spkm3_seal.c')
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_seal.c186
1 files changed, 0 insertions, 186 deletions
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 5a3a65a0e2b..00000000000
--- 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}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 09:18:02 -0400