v4.19.13 snapshot.
diff --git a/crypto/asymmetric_keys/mscode_parser.c b/crypto/asymmetric_keys/mscode_parser.c
new file mode 100644
index 0000000..83d2e9b
--- /dev/null
+++ b/crypto/asymmetric_keys/mscode_parser.c
@@ -0,0 +1,133 @@
+/* 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;
+}