LXR uboot/include/crypto/public

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/* Asymmetric public-key algorithm definitions
   3 *
   4 * See Documentation/crypto/asymmetric-keys.txt
   5 *
   6 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
   7 * Written by David Howells (dhowells@redhat.com)
   8 */
   9
  10#ifndef _LINUX_PUBLIC_KEY_H
  11#define _LINUX_PUBLIC_KEY_H
  12
  13#ifdef __UBOOT__
  14#include <linux/types.h>
  15#else
  16#include <linux/keyctl.h>
  17#endif
  18#include <linux/oid_registry.h>
  19
  20/*
  21 * Cryptographic data for the public-key subtype of the asymmetric key type.
  22 *
  23 * Note that this may include private part of the key as well as the public
  24 * part.
  25 */
  26struct public_key {
  27        void *key;
  28        u32 keylen;
  29        enum OID algo;
  30        void *params;
  31        u32 paramlen;
  32        bool key_is_private;
  33        const char *id_type;
  34        const char *pkey_algo;
  35};
  36
  37extern void public_key_free(struct public_key *key);
  38
  39/*
  40 * Public key cryptography signature data
  41 */
  42struct public_key_signature {
  43        struct asymmetric_key_id *auth_ids[2];
  44        u8 *s;                  /* Signature */
  45        u32 s_size;             /* Number of bytes in signature */
  46        u8 *digest;
  47        u8 digest_size;         /* Number of bytes in digest */
  48        const char *pkey_algo;
  49        const char *hash_algo;
  50        const char *encoding;
  51};
  52
  53extern void public_key_signature_free(struct public_key_signature *sig);
  54
  55#ifndef __UBOOT__
  56extern struct asymmetric_key_subtype public_key_subtype;
  57
  58struct key;
  59struct key_type;
  60union key_payload;
  61
  62extern int restrict_link_by_signature(struct key *dest_keyring,
  63                                      const struct key_type *type,
  64                                      const union key_payload *payload,
  65                                      struct key *trust_keyring);
  66
  67extern int restrict_link_by_key_or_keyring(struct key *dest_keyring,
  68                                           const struct key_type *type,
  69                                           const union key_payload *payload,
  70                                           struct key *trusted);
  71
  72extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring,
  73                                                 const struct key_type *type,
  74                                                 const union key_payload *payload,
  75                                                 struct key *trusted);
  76
  77extern int query_asymmetric_key(const struct kernel_pkey_params *,
  78                                struct kernel_pkey_query *);
  79
  80extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *);
  81extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *);
  82extern int create_signature(struct kernel_pkey_params *, const void *, void *);
  83extern int verify_signature(const struct key *,
  84                            const struct public_key_signature *);
  85#endif /* __UBOOT__ */
  86
  87int public_key_verify_signature(const struct public_key *pkey,
  88                                const struct public_key_signature *sig);
  89
  90#endif /* _LINUX_PUBLIC_KEY_H */
  91