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TOMOYO Linux Cross Reference
Linux/include/crypto/public_key.h

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

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