mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
d128471a14
Commite68503bd68forgot to set digest_len and thus cause the following error reported by kexec when launching a crash kernel: kexec_file_load failed: Bad message Fixes:e68503bd68(KEYS: Generalise system_verify_data() to provide access to internal content) Signed-off-by: Lans Zhang <jia.zhang@windriver.com> Tested-by: Dave Young <dyoung@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> cc: kexec@lists.infradead.org cc: linux-crypto@vger.kernel.org Signed-off-by: James Morris <james.l.morris@oracle.com>
133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
/* Parse a Microsoft Individual Code Signing blob
|
|
*
|
|
* Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "MSCODE: "fmt
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/err.h>
|
|
#include <linux/oid_registry.h>
|
|
#include <crypto/pkcs7.h>
|
|
#include "verify_pefile.h"
|
|
#include "mscode-asn1.h"
|
|
|
|
/*
|
|
* Parse a Microsoft Individual Code Signing blob
|
|
*/
|
|
int mscode_parse(void *_ctx, const void *content_data, size_t data_len,
|
|
size_t asn1hdrlen)
|
|
{
|
|
struct pefile_context *ctx = _ctx;
|
|
|
|
content_data -= asn1hdrlen;
|
|
data_len += asn1hdrlen;
|
|
pr_devel("Data: %zu [%*ph]\n", data_len, (unsigned)(data_len),
|
|
content_data);
|
|
|
|
return asn1_ber_decoder(&mscode_decoder, ctx, content_data, data_len);
|
|
}
|
|
|
|
/*
|
|
* Check the content type OID
|
|
*/
|
|
int mscode_note_content_type(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
enum OID oid;
|
|
|
|
oid = look_up_OID(value, vlen);
|
|
if (oid == OID__NR) {
|
|
char buffer[50];
|
|
|
|
sprint_oid(value, vlen, buffer, sizeof(buffer));
|
|
pr_err("Unknown OID: %s\n", buffer);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
/*
|
|
* pesign utility had a bug where it was putting
|
|
* OID_msIndividualSPKeyPurpose instead of OID_msPeImageDataObjId
|
|
* So allow both OIDs.
|
|
*/
|
|
if (oid != OID_msPeImageDataObjId &&
|
|
oid != OID_msIndividualSPKeyPurpose) {
|
|
pr_err("Unexpected content type OID %u\n", oid);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Note the digest algorithm OID
|
|
*/
|
|
int mscode_note_digest_algo(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct pefile_context *ctx = context;
|
|
char buffer[50];
|
|
enum OID oid;
|
|
|
|
oid = look_up_OID(value, vlen);
|
|
switch (oid) {
|
|
case OID_md4:
|
|
ctx->digest_algo = "md4";
|
|
break;
|
|
case OID_md5:
|
|
ctx->digest_algo = "md5";
|
|
break;
|
|
case OID_sha1:
|
|
ctx->digest_algo = "sha1";
|
|
break;
|
|
case OID_sha256:
|
|
ctx->digest_algo = "sha256";
|
|
break;
|
|
case OID_sha384:
|
|
ctx->digest_algo = "sha384";
|
|
break;
|
|
case OID_sha512:
|
|
ctx->digest_algo = "sha512";
|
|
break;
|
|
case OID_sha224:
|
|
ctx->digest_algo = "sha224";
|
|
break;
|
|
|
|
case OID__NR:
|
|
sprint_oid(value, vlen, buffer, sizeof(buffer));
|
|
pr_err("Unknown OID: %s\n", buffer);
|
|
return -EBADMSG;
|
|
|
|
default:
|
|
pr_err("Unsupported content type: %u\n", oid);
|
|
return -ENOPKG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Note the digest we're guaranteeing with this certificate
|
|
*/
|
|
int mscode_note_digest(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct pefile_context *ctx = context;
|
|
|
|
ctx->digest = kmemdup(value, vlen, GFP_KERNEL);
|
|
if (!ctx->digest)
|
|
return -ENOMEM;
|
|
|
|
ctx->digest_len = vlen;
|
|
|
|
return 0;
|
|
}
|