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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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00fd6e1425
Not only are the qop parameters that are passed around throughout the gssapi unused by any currently implemented mechanism, but there appears to be some doubt as to whether they will ever be used. Let's just kill them off for now. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
/*
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* linux/net/sunrpc/gss_spkm3_seal.c
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*
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* Copyright (c) 2003 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Andy Adamson <andros@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/sunrpc/gss_spkm3.h>
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#include <linux/random.h>
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#include <linux/crypto.h>
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#ifdef RPC_DEBUG
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# define RPCDBG_FACILITY RPCDBG_AUTH
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#endif
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/*
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* spkm3_make_token()
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*
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* Only SPKM_MIC_TOK with md5 intg-alg is supported
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*/
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u32
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spkm3_make_token(struct spkm3_ctx *ctx,
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struct xdr_buf * text, struct xdr_netobj * token,
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int toktype)
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{
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s32 checksum_type;
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char tokhdrbuf[25];
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struct xdr_netobj md5cksum = {.len = 0, .data = NULL};
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struct xdr_netobj mic_hdr = {.len = 0, .data = tokhdrbuf};
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int tmsglen, tokenlen = 0;
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unsigned char *ptr;
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s32 now;
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int ctxelen = 0, ctxzbit = 0;
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int md5elen = 0, md5zbit = 0;
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dprintk("RPC: spkm3_make_token\n");
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now = jiffies;
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if (ctx->ctx_id.len != 16) {
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dprintk("RPC: spkm3_make_token BAD ctx_id.len %d\n",
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ctx->ctx_id.len);
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goto out_err;
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}
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switch (ctx->intg_alg) {
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case NID_md5:
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checksum_type = CKSUMTYPE_RSA_MD5;
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break;
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default:
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dprintk("RPC: gss_spkm3_seal: ctx->signalg %d not"
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" supported\n", ctx->intg_alg);
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goto out_err;
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}
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/* XXX since we don't support WRAP, perhaps we don't care... */
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if (ctx->conf_alg != NID_cast5_cbc) {
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dprintk("RPC: gss_spkm3_seal: ctx->sealalg %d not supported\n",
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ctx->conf_alg);
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goto out_err;
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}
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if (toktype == SPKM_MIC_TOK) {
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tmsglen = 0;
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/* Calculate checksum over the mic-header */
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asn1_bitstring_len(&ctx->ctx_id, &ctxelen, &ctxzbit);
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spkm3_mic_header(&mic_hdr.data, &mic_hdr.len, ctx->ctx_id.data,
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ctxelen, ctxzbit);
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if (make_checksum(checksum_type, mic_hdr.data, mic_hdr.len,
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text, &md5cksum))
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goto out_err;
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asn1_bitstring_len(&md5cksum, &md5elen, &md5zbit);
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tokenlen = 10 + ctxelen + 1 + 2 + md5elen + 1;
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/* Create token header using generic routines */
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token->len = g_token_size(&ctx->mech_used, tokenlen + tmsglen);
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ptr = token->data;
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g_make_token_header(&ctx->mech_used, tokenlen + tmsglen, &ptr);
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spkm3_make_mic_token(&ptr, tokenlen, &mic_hdr, &md5cksum, md5elen, md5zbit);
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} else if (toktype == SPKM_WRAP_TOK) { /* Not Supported */
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dprintk("RPC: gss_spkm3_seal: SPKM_WRAP_TOK not supported\n");
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goto out_err;
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}
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kfree(md5cksum.data);
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/* XXX need to implement sequence numbers, and ctx->expired */
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return GSS_S_COMPLETE;
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out_err:
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if (md5cksum.data)
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kfree(md5cksum.data);
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token->data = NULL;
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token->len = 0;
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return GSS_S_FAILURE;
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}
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