Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / crypto / asymmetric_keys / mscode_parser.c

diff --git a/kernel/crypto/asymmetric_keys/mscode_parser.c b/kernel/crypto/asymmetric_keys/mscode_parser.c
new file mode 100644 (file)
index 0000000..214a992
--- /dev/null
+++ b/kernel/crypto/asymmetric_keys/mscode_parser.c
@@ -0,0 +1,126 @@
+/* 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(struct pefile_context *ctx)
+{
+       const void *content_data;
+       size_t data_len;
+       int ret;
+
+       ret = pkcs7_get_content_data(ctx->pkcs7, &content_data, &data_len, 1);
+
+       if (ret) {
+               pr_debug("PKCS#7 message does not contain data\n");
+               return ret;
+       }
+
+       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 = HASH_ALGO_MD4;
+               break;
+       case OID_md5:
+               ctx->digest_algo = HASH_ALGO_MD5;
+               break;
+       case OID_sha1:
+               ctx->digest_algo = HASH_ALGO_SHA1;
+               break;
+       case OID_sha256:
+               ctx->digest_algo = HASH_ALGO_SHA256;
+               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 = value;
+       ctx->digest_len = vlen;
+       return 0;
+}