mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 15:50:57 +07:00
9e57b302cf
Remove unnecessary kmalloc of temporary space to hold the md5 result; it's small enough to just put on the stack. This code may be called to process rpc's necessary to perform writes, so there's a potential deadlock whenever we kmalloc() here. After this a couple kmalloc()'s still remain, to be removed soon. This also fixes a rare double-free on error noticed by coverity. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/*
|
|
* 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/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
|
|
|
|
/*
|
|
* 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;
|
|
|
|
dprintk("RPC: spkm3_make_token\n");
|
|
|
|
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;
|
|
}
|
|
|
|
switch (ctx->intg_alg) {
|
|
case NID_md5:
|
|
checksum_type = CKSUMTYPE_RSA_MD5;
|
|
break;
|
|
default:
|
|
dprintk("RPC: gss_spkm3_seal: ctx->signalg %d not"
|
|
" supported\n", ctx->intg_alg);
|
|
goto out_err;
|
|
}
|
|
/* XXX since we don't support WRAP, perhaps we don't care... */
|
|
if (ctx->conf_alg != NID_cast5_cbc) {
|
|
dprintk("RPC: gss_spkm3_seal: ctx->sealalg %d not supported\n",
|
|
ctx->conf_alg);
|
|
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_checksum(checksum_type, 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);
|
|
|
|
ptr = token->data;
|
|
g_make_token_header(&ctx->mech_used, tokenlen, &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;
|
|
}
|