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f1774cb895
Some public key algorithms (like EC-DSA) keep in parameters field
important data such as digest and curve OIDs (possibly more for
different EC-DSA variants). Thus, just setting a public key (as
for RSA) is not enough.
Append parameters into the key stream for akcipher_set_{pub,priv}_key.
Appended data is: (u32) algo OID, (u32) parameters length, parameters
data.
This does not affect current akcipher API nor RSA ciphers (they could
ignore it). Idea of appending parameters to the key stream is by Herbert
Xu.
Cc: David Howells <dhowells@redhat.com>
Cc: Denis Kenzior <denkenz@gmail.com>
Cc: keyrings@vger.kernel.org
Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/* Asymmetric public-key algorithm definitions
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*
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* See Documentation/crypto/asymmetric-keys.txt
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*
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* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _LINUX_PUBLIC_KEY_H
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#define _LINUX_PUBLIC_KEY_H
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#include <linux/keyctl.h>
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#include <linux/oid_registry.h>
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/*
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* Cryptographic data for the public-key subtype of the asymmetric key type.
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*
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* Note that this may include private part of the key as well as the public
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* part.
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*/
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struct public_key {
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void *key;
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u32 keylen;
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enum OID algo;
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void *params;
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u32 paramlen;
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bool key_is_private;
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const char *id_type;
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const char *pkey_algo;
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};
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extern void public_key_free(struct public_key *key);
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/*
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* Public key cryptography signature data
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*/
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struct public_key_signature {
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struct asymmetric_key_id *auth_ids[2];
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u8 *s; /* Signature */
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u32 s_size; /* Number of bytes in signature */
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u8 *digest;
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u8 digest_size; /* Number of bytes in digest */
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const char *pkey_algo;
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const char *hash_algo;
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const char *encoding;
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};
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extern void public_key_signature_free(struct public_key_signature *sig);
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extern struct asymmetric_key_subtype public_key_subtype;
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struct key;
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struct key_type;
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union key_payload;
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extern int restrict_link_by_signature(struct key *dest_keyring,
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const struct key_type *type,
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const union key_payload *payload,
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struct key *trust_keyring);
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extern int restrict_link_by_key_or_keyring(struct key *dest_keyring,
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const struct key_type *type,
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const union key_payload *payload,
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struct key *trusted);
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extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring,
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const struct key_type *type,
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const union key_payload *payload,
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struct key *trusted);
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extern int query_asymmetric_key(const struct kernel_pkey_params *,
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struct kernel_pkey_query *);
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extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *);
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extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *);
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extern int create_signature(struct kernel_pkey_params *, const void *, void *);
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extern int verify_signature(const struct key *,
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const struct public_key_signature *);
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int public_key_verify_signature(const struct public_key *pkey,
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const struct public_key_signature *sig);
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#endif /* _LINUX_PUBLIC_KEY_H */
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