Linux 6.9-rc4

[sfrench/cifs-2.6.git] / kernel / module_signing.c

diff --git a/kernel/module_signing.c b/kernel/module_signing.c
deleted file mode 100644 (file)
index b10fb19..0000000
--- a/kernel/module_signing.c
+++ /dev/null
@@ -1,85 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* Module signature checker
- *
- * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/verification.h>
-#include <crypto/public_key.h>
-#include "module-internal.h"
-
-enum pkey_id_type {
-       PKEY_ID_PGP,            /* OpenPGP generated key ID */
-       PKEY_ID_X509,           /* X.509 arbitrary subjectKeyIdentifier */
-       PKEY_ID_PKCS7,          /* Signature in PKCS#7 message */
-};
-
-/*
- * Module signature information block.
- *
- * The constituents of the signature section are, in order:
- *
- *     - Signer's name
- *     - Key identifier
- *     - Signature data
- *     - Information block
- */
-struct module_signature {
-       u8      algo;           /* Public-key crypto algorithm [0] */
-       u8      hash;           /* Digest algorithm [0] */
-       u8      id_type;        /* Key identifier type [PKEY_ID_PKCS7] */
-       u8      signer_len;     /* Length of signer's name [0] */
-       u8      key_id_len;     /* Length of key identifier [0] */
-       u8      __pad[3];
-       __be32  sig_len;        /* Length of signature data */
-};
-
-/*
- * Verify the signature on a module.
- */
-int mod_verify_sig(const void *mod, struct load_info *info)
-{
-       struct module_signature ms;
-       size_t sig_len, modlen = info->len;
-
-       pr_devel("==>%s(,%zu)\n", __func__, modlen);
-
-       if (modlen <= sizeof(ms))
-               return -EBADMSG;
-
-       memcpy(&ms, mod + (modlen - sizeof(ms)), sizeof(ms));
-       modlen -= sizeof(ms);
-
-       sig_len = be32_to_cpu(ms.sig_len);
-       if (sig_len >= modlen)
-               return -EBADMSG;
-       modlen -= sig_len;
-       info->len = modlen;
-
-       if (ms.id_type != PKEY_ID_PKCS7) {
-               pr_err("%s: Module is not signed with expected PKCS#7 message\n",
-                      info->name);
-               return -ENOPKG;
-       }
-
-       if (ms.algo != 0 ||
-           ms.hash != 0 ||
-           ms.signer_len != 0 ||
-           ms.key_id_len != 0 ||
-           ms.__pad[0] != 0 ||
-           ms.__pad[1] != 0 ||
-           ms.__pad[2] != 0) {
-               pr_err("%s: PKCS#7 signature info has unexpected non-zero params\n",
-                      info->name);
-               return -EBADMSG;
-       }
-
-       return verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
-                                     VERIFY_USE_SECONDARY_KEYRING,
-                                     VERIFYING_MODULE_SIGNATURE,
-                                     NULL, NULL);
-}