1 files changed, 108 insertions, 0 deletions

diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
new file mode 100644
index 000000000000..f5b0224c9967
--- /dev/null
+++ b/include/crypto/public_key.h
@@ -0,0 +1,108 @@
+/* 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;
+        };
+};
+
+struct key;
+extern int verify_signature(const struct key *key,
+                            const struct public_key_signature *sig);
+
+#endif /* _LINUX_PUBLIC_KEY_H */