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203a6763ab
This reverts commit 16ab7cb582 because it
broke iwd. iwd uses the KEYCTL_PKEY_* UAPIs via its dependency libell,
and apparently it is relying on SHA-1 signature support. These UAPIs
are fairly obscure, and their documentation does not mention which
algorithms they support. iwd really should be using a properly
supported userspace crypto library instead. Regardless, since something
broke we have to revert the change.
It may be possible that some parts of this commit can be reinstated
without breaking iwd (e.g. probably the removal of MODULE_SIG_SHA1), but
for now this just does a full revert to get things working again.
Reported-by: Karel Balej <balejk@matfyz.cz>
Closes: https://lore.kernel.org/r/CZSHRUIJ4RKL.34T4EASV5DNJM@matfyz.cz
Cc: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Tested-by: Karel Balej <balejk@matfyz.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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_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_sha3_256:
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ctx->digest_algo = "sha3-256";
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break;
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case OID_sha3_384:
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ctx->digest_algo = "sha3-384";
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break;
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case OID_sha3_512:
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ctx->digest_algo = "sha3-512";
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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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