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b4d0d230cc
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 114 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520170857.552531963@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Parse a Microsoft Individual Code Signing blob
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*
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* Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#define pr_fmt(fmt) "MSCODE: "fmt
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/oid_registry.h>
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#include <crypto/pkcs7.h>
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#include "verify_pefile.h"
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#include "mscode.asn1.h"
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/*
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* Parse a Microsoft Individual Code Signing blob
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*/
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int mscode_parse(void *_ctx, const void *content_data, size_t data_len,
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size_t asn1hdrlen)
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{
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struct pefile_context *ctx = _ctx;
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content_data -= asn1hdrlen;
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data_len += asn1hdrlen;
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pr_devel("Data: %zu [%*ph]\n", data_len, (unsigned)(data_len),
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content_data);
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return asn1_ber_decoder(&mscode_decoder, ctx, content_data, data_len);
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}
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/*
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* Check the content type OID
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*/
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int mscode_note_content_type(void *context, size_t hdrlen,
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unsigned char tag,
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const void *value, size_t vlen)
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{
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enum OID oid;
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oid = look_up_OID(value, vlen);
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if (oid == OID__NR) {
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char buffer[50];
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sprint_oid(value, vlen, buffer, sizeof(buffer));
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pr_err("Unknown OID: %s\n", buffer);
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return -EBADMSG;
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}
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/*
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* pesign utility had a bug where it was putting
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* OID_msIndividualSPKeyPurpose instead of OID_msPeImageDataObjId
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* So allow both OIDs.
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*/
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if (oid != OID_msPeImageDataObjId &&
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oid != OID_msIndividualSPKeyPurpose) {
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pr_err("Unexpected content type OID %u\n", oid);
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return -EBADMSG;
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}
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return 0;
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}
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/*
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* Note the digest algorithm OID
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*/
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int mscode_note_digest_algo(void *context, size_t hdrlen,
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unsigned char tag,
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const void *value, size_t vlen)
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{
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struct pefile_context *ctx = context;
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char buffer[50];
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enum OID oid;
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oid = look_up_OID(value, vlen);
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switch (oid) {
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case OID_md4:
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ctx->digest_algo = "md4";
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break;
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case OID_md5:
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ctx->digest_algo = "md5";
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break;
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case OID_sha1:
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ctx->digest_algo = "sha1";
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break;
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case OID_sha256:
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ctx->digest_algo = "sha256";
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break;
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case OID_sha384:
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ctx->digest_algo = "sha384";
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break;
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case OID_sha512:
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ctx->digest_algo = "sha512";
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break;
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case OID_sha224:
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ctx->digest_algo = "sha224";
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break;
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case OID__NR:
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sprint_oid(value, vlen, buffer, sizeof(buffer));
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pr_err("Unknown OID: %s\n", buffer);
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return -EBADMSG;
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default:
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pr_err("Unsupported content type: %u\n", oid);
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return -ENOPKG;
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}
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return 0;
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}
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/*
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* Note the digest we're guaranteeing with this certificate
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*/
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int mscode_note_digest(void *context, size_t hdrlen,
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unsigned char tag,
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const void *value, size_t vlen)
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{
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struct pefile_context *ctx = context;
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ctx->digest = kmemdup(value, vlen, GFP_KERNEL);
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if (!ctx->digest)
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return -ENOMEM;
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ctx->digest_len = vlen;
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return 0;
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}
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