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authorDavid Howells <dhowells@redhat.com>2012-09-21 23:24:55 +0100
committerRusty Russell <rusty@rustcorp.com.au>2012-10-08 13:50:14 +1030
commita9681bf3dd7ccd2b32eba27d327ab76607429f7a (patch)
tree667676a21ec5f72e15d37c9db7fb3a77c10bc0cd /include/crypto
parent46c6f1776e2f53eebb1fc361946877bab7533227 (diff)
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KEYS: Asymmetric public-key algorithm crypto key subtype
Add a subtype for supporting asymmetric public-key encryption algorithms such as DSA (FIPS-186) and RSA (PKCS#1 / RFC1337). Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/crypto')
-rw-r--r--include/crypto/public_key.h104
1 files changed, 104 insertions, 0 deletions
diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
new file mode 100644
index 000000000000..4b8b6c16eac6
--- /dev/null
+++ b/include/crypto/public_key.h
@@ -0,0 +1,104 @@
+/* Asymmetric public-key algorithm definitions
+ *
+ * See Documentation/crypto/asymmetric-keys.txt
+ *
+ * Copyright (C) 2012 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.
+ */
+
+#ifndef _LINUX_PUBLIC_KEY_H
+#define _LINUX_PUBLIC_KEY_H
+
+#include <linux/mpi.h>
+
+enum pkey_algo {
+ PKEY_ALGO_DSA,
+ PKEY_ALGO_RSA,
+ PKEY_ALGO__LAST
+};
+
+extern const char *const pkey_algo[PKEY_ALGO__LAST];
+
+enum pkey_hash_algo {
+ PKEY_HASH_MD4,
+ PKEY_HASH_MD5,
+ PKEY_HASH_SHA1,
+ PKEY_HASH_RIPE_MD_160,
+ PKEY_HASH_SHA256,
+ PKEY_HASH_SHA384,
+ PKEY_HASH_SHA512,
+ PKEY_HASH_SHA224,
+ PKEY_HASH__LAST
+};
+
+extern const char *const pkey_hash_algo[PKEY_HASH__LAST];
+
+enum pkey_id_type {
+ PKEY_ID_PGP, /* OpenPGP generated key ID */
+ PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */
+ PKEY_ID_TYPE__LAST
+};
+
+extern const char *const pkey_id_type[PKEY_ID_TYPE__LAST];
+
+/*
+ * Cryptographic data for the public-key subtype of the asymmetric key type.
+ *
+ * Note that this may include private part of the key as well as the public
+ * part.
+ */
+struct public_key {
+ const struct public_key_algorithm *algo;
+ u8 capabilities;
+#define PKEY_CAN_ENCRYPT 0x01
+#define PKEY_CAN_DECRYPT 0x02
+#define PKEY_CAN_SIGN 0x04
+#define PKEY_CAN_VERIFY 0x08
+ enum pkey_id_type id_type : 8;
+ union {
+ MPI mpi[5];
+ struct {
+ MPI p; /* DSA prime */
+ MPI q; /* DSA group order */
+ MPI g; /* DSA group generator */
+ MPI y; /* DSA public-key value = g^x mod p */
+ MPI x; /* DSA secret exponent (if present) */
+ } dsa;
+ struct {
+ MPI n; /* RSA public modulus */
+ MPI e; /* RSA public encryption exponent */
+ MPI d; /* RSA secret encryption exponent (if present) */
+ MPI p; /* RSA secret prime (if present) */
+ MPI q; /* RSA secret prime (if present) */
+ } rsa;
+ };
+};
+
+extern void public_key_destroy(void *payload);
+
+/*
+ * Public key cryptography signature data
+ */
+struct public_key_signature {
+ u8 *digest;
+ u8 digest_size; /* Number of bytes in digest */
+ u8 nr_mpi; /* Occupancy of mpi[] */
+ enum pkey_hash_algo pkey_hash_algo : 8;
+ union {
+ MPI mpi[2];
+ struct {
+ MPI s; /* m^d mod n */
+ } rsa;
+ struct {
+ MPI r;
+ MPI s;
+ } dsa;
+ };
+};
+
+#endif /* _LINUX_PUBLIC_KEY_H */