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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 15:06:39 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 15:06:39 (GMT) |
commit | bb2cbf5e9367d8598fecd0c48dead69560750223 (patch) | |
tree | fb2c620451b90f41a31726bdd82077813f941e39 /crypto/asymmetric_keys/pkcs7_key_type.c | |
parent | e7fda6c4c3c1a7d6996dd75fd84670fa0b5d448f (diff) | |
parent | 478d085524c57cf4283699f529d5a4c22188ea69 (diff) | |
download | linux-bb2cbf5e9367d8598fecd0c48dead69560750223.tar.xz |
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris:
"In this release:
- PKCS#7 parser for the key management subsystem from David Howells
- appoint Kees Cook as seccomp maintainer
- bugfixes and general maintenance across the subsystem"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (94 commits)
X.509: Need to export x509_request_asymmetric_key()
netlabel: shorter names for the NetLabel catmap funcs/structs
netlabel: fix the catmap walking functions
netlabel: fix the horribly broken catmap functions
netlabel: fix a problem when setting bits below the previously lowest bit
PKCS#7: X.509 certificate issuer and subject are mandatory fields in the ASN.1
tpm: simplify code by using %*phN specifier
tpm: Provide a generic means to override the chip returned timeouts
tpm: missing tpm_chip_put in tpm_get_random()
tpm: Properly clean sysfs entries in error path
tpm: Add missing tpm_do_selftest to ST33 I2C driver
PKCS#7: Use x509_request_asymmetric_key()
Revert "selinux: fix the default socket labeling in sock_graft()"
X.509: x509_request_asymmetric_keys() doesn't need string length arguments
PKCS#7: fix sparse non static symbol warning
KEYS: revert encrypted key change
ima: add support for measuring and appraising firmware
firmware_class: perform new LSM checks
security: introduce kernel_fw_from_file hook
PKCS#7: Missing inclusion of linux/err.h
...
Diffstat (limited to 'crypto/asymmetric_keys/pkcs7_key_type.c')
-rw-r--r-- | crypto/asymmetric_keys/pkcs7_key_type.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/crypto/asymmetric_keys/pkcs7_key_type.c b/crypto/asymmetric_keys/pkcs7_key_type.c new file mode 100644 index 0000000..3de5fb0 --- /dev/null +++ b/crypto/asymmetric_keys/pkcs7_key_type.c @@ -0,0 +1,100 @@ +/* Testing module to load key from trusted PKCS#7 message + * + * 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) "PKCS7key: "fmt +#include <linux/key.h> +#include <linux/err.h> +#include <linux/key-type.h> +#include <crypto/pkcs7.h> +#include <keys/user-type.h> +#include <keys/system_keyring.h> +#include "pkcs7_parser.h" + +/* + * Preparse a PKCS#7 wrapped and validated data blob. + */ +static int pkcs7_preparse(struct key_preparsed_payload *prep) +{ + struct pkcs7_message *pkcs7; + const void *data, *saved_prep_data; + size_t datalen, saved_prep_datalen; + bool trusted; + int ret; + + kenter(""); + + saved_prep_data = prep->data; + saved_prep_datalen = prep->datalen; + pkcs7 = pkcs7_parse_message(saved_prep_data, saved_prep_datalen); + if (IS_ERR(pkcs7)) { + ret = PTR_ERR(pkcs7); + goto error; + } + + ret = pkcs7_verify(pkcs7); + if (ret < 0) + goto error_free; + + ret = pkcs7_validate_trust(pkcs7, system_trusted_keyring, &trusted); + if (ret < 0) + goto error_free; + if (!trusted) + pr_warn("PKCS#7 message doesn't chain back to a trusted key\n"); + + ret = pkcs7_get_content_data(pkcs7, &data, &datalen, false); + if (ret < 0) + goto error_free; + + prep->data = data; + prep->datalen = datalen; + ret = user_preparse(prep); + prep->data = saved_prep_data; + prep->datalen = saved_prep_datalen; + +error_free: + pkcs7_free_message(pkcs7); +error: + kleave(" = %d", ret); + return ret; +} + +/* + * user defined keys take an arbitrary string as the description and an + * arbitrary blob of data as the payload + */ +static struct key_type key_type_pkcs7 = { + .name = "pkcs7_test", + .def_lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT, + .preparse = pkcs7_preparse, + .free_preparse = user_free_preparse, + .instantiate = generic_key_instantiate, + .match = user_match, + .revoke = user_revoke, + .destroy = user_destroy, + .describe = user_describe, + .read = user_read, +}; + +/* + * Module stuff + */ +static int __init pkcs7_key_init(void) +{ + return register_key_type(&key_type_pkcs7); +} + +static void __exit pkcs7_key_cleanup(void) +{ + unregister_key_type(&key_type_pkcs7); +} + +module_init(pkcs7_key_init); +module_exit(pkcs7_key_cleanup); |