LXR linux/include/crypto/public

   1/* Asymmetric public-key algorithm definitions
   2 *
   3 * See Documentation/crypto/asymmetric-keys.txt
   4 *
   5 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
   6 * Written by David Howells (dhowells@redhat.com)
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public Licence
  10 * as published by the Free Software Foundation; either version
  11 * 2 of the Licence, or (at your option) any later version.
  12 */
  13
  14#ifndef _LINUX_PUBLIC_KEY_H
  15#define _LINUX_PUBLIC_KEY_H
  16
  17/*
  18 * The use to which an asymmetric key is being put.
  19 */
  20enum key_being_used_for {
  21        VERIFYING_MODULE_SIGNATURE,
  22        VERIFYING_FIRMWARE_SIGNATURE,
  23        VERIFYING_KEXEC_PE_SIGNATURE,
  24        VERIFYING_KEY_SIGNATURE,
  25        VERIFYING_KEY_SELF_SIGNATURE,
  26        VERIFYING_UNSPECIFIED_SIGNATURE,
  27        NR__KEY_BEING_USED_FOR
  28};
  29extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
  30
  31/*
  32 * Cryptographic data for the public-key subtype of the asymmetric key type.
  33 *
  34 * Note that this may include private part of the key as well as the public
  35 * part.
  36 */
  37struct public_key {
  38        void *key;
  39        u32 keylen;
  40        const char *id_type;
  41        const char *pkey_algo;
  42};
  43
  44extern void public_key_destroy(void *payload);
  45
  46/*
  47 * Public key cryptography signature data
  48 */
  49struct public_key_signature {
  50        u8 *s;                  /* Signature */
  51        u32 s_size;             /* Number of bytes in signature */
  52        u8 *digest;
  53        u8 digest_size;         /* Number of bytes in digest */
  54        const char *pkey_algo;
  55        const char *hash_algo;
  56};
  57
  58extern struct asymmetric_key_subtype public_key_subtype;
  59struct key;
  60extern int verify_signature(const struct key *key,
  61                            const struct public_key_signature *sig);
  62
  63struct asymmetric_key_id;
  64extern struct key *x509_request_asymmetric_key(struct key *keyring,
  65                                               const struct asymmetric_key_id *id,
  66                                               const struct asymmetric_key_id *skid,
  67                                               bool partial);
  68
  69int public_key_verify_signature(const struct public_key *pkey,
  70                                const struct public_key_signature *sig);
  71
  72#endif /* _LINUX_PUBLIC_KEY_H */
  73