2 * linux/net/sunrpc/gss_spkm3_seal.c
4 * Copyright (c) 2003 The Regents of the University of Michigan.
7 * Andy Adamson <andros@umich.edu>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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.
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>
44 # define RPCDBG_FACILITY RPCDBG_AUTH
50 * Only SPKM_MIC_TOK with md5 intg-alg is supported
54 spkm3_make_token(struct spkm3_ctx *ctx, int qop_req,
55 struct xdr_buf * text, struct xdr_netobj * token,
60 struct xdr_netobj md5cksum = {.len = 0, .data = NULL};
61 struct xdr_netobj mic_hdr = {.len = 0, .data = tokhdrbuf};
62 int tmsglen, tokenlen = 0;
65 int ctxelen = 0, ctxzbit = 0;
66 int md5elen = 0, md5zbit = 0;
68 dprintk("RPC: spkm3_make_token\n");
74 if (ctx->ctx_id.len != 16) {
75 dprintk("RPC: spkm3_make_token BAD ctx_id.len %d\n",
80 switch (ctx->intg_alg) {
82 checksum_type = CKSUMTYPE_RSA_MD5;
85 dprintk("RPC: gss_spkm3_seal: ctx->signalg %d not"
86 " supported\n", ctx->intg_alg);
89 /* XXX since we don't support WRAP, perhaps we don't care... */
90 if (ctx->conf_alg != NID_cast5_cbc) {
91 dprintk("RPC: gss_spkm3_seal: ctx->sealalg %d not supported\n",
96 if (toktype == SPKM_MIC_TOK) {
98 /* Calculate checksum over the mic-header */
99 asn1_bitstring_len(&ctx->ctx_id, &ctxelen, &ctxzbit);
100 spkm3_mic_header(&mic_hdr.data, &mic_hdr.len, ctx->ctx_id.data,
103 if (make_checksum(checksum_type, mic_hdr.data, mic_hdr.len,
107 asn1_bitstring_len(&md5cksum, &md5elen, &md5zbit);
108 tokenlen = 10 + ctxelen + 1 + 2 + md5elen + 1;
110 /* Create token header using generic routines */
111 token->len = g_token_size(&ctx->mech_used, tokenlen + tmsglen);
114 g_make_token_header(&ctx->mech_used, tokenlen + tmsglen, &ptr);
116 spkm3_make_mic_token(&ptr, tokenlen, &mic_hdr, &md5cksum, md5elen, md5zbit);
117 } else if (toktype == SPKM_WRAP_TOK) { /* Not Supported */
118 dprintk("RPC: gss_spkm3_seal: SPKM_WRAP_TOK not supported\n");
121 kfree(md5cksum.data);
123 /* XXX need to implement sequence numbers, and ctx->expired */
125 return GSS_S_COMPLETE;
128 kfree(md5cksum.data);
131 return GSS_S_FAILURE;