You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
182 lines
7.8 KiB
182 lines
7.8 KiB
/* ====================================================================
|
|
* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com). */
|
|
|
|
#ifndef OPENSSL_HEADER_ECDSA_H
|
|
#define OPENSSL_HEADER_ECDSA_H
|
|
|
|
#include <openssl/base.h>
|
|
|
|
#include <openssl/ec_key.h>
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* ECDSA contains functions for signing and verifying with the Digital Signature
|
|
* Algorithm over elliptic curves. */
|
|
|
|
|
|
/* Signing and verifing. */
|
|
|
|
/* ECDSA_sign signs |digest_len| bytes from |digest| with |key| and writes the
|
|
* resulting signature to |sig|, which must have |ECDSA_size(key)| bytes of
|
|
* space. On successful exit, |*sig_len| is set to the actual number of bytes
|
|
* written. The |type| argument should be zero. It returns one on success and
|
|
* zero otherwise. */
|
|
OPENSSL_EXPORT int ECDSA_sign(int type, const uint8_t *digest,
|
|
size_t digest_len, uint8_t *sig,
|
|
unsigned int *sig_len, EC_KEY *key);
|
|
|
|
/* ECDSA_verify verifies that |sig_len| bytes from |sig| constitute a valid
|
|
* signature by |key| of |digest|. (The |type| argument should be zero.) It
|
|
* returns one on success or zero if the signature is invalid or an error
|
|
* occured. */
|
|
OPENSSL_EXPORT int ECDSA_verify(int type, const uint8_t *digest,
|
|
size_t digest_len, const uint8_t *sig,
|
|
size_t sig_len, EC_KEY *key);
|
|
|
|
/* ECDSA_size returns the maximum size of an ECDSA signature using |key|. It
|
|
* returns zero on error. */
|
|
OPENSSL_EXPORT size_t ECDSA_size(const EC_KEY *key);
|
|
|
|
|
|
/* Low-level signing and verification.
|
|
*
|
|
* Low-level functions handle signatures as |ECDSA_SIG| structures which allow
|
|
* the two values in an ECDSA signature to be handled separately. */
|
|
|
|
struct ecdsa_sig_st {
|
|
BIGNUM *r;
|
|
BIGNUM *s;
|
|
};
|
|
|
|
/* ECDSA_SIG_new returns a fresh |ECDSA_SIG| structure or NULL on error. */
|
|
OPENSSL_EXPORT ECDSA_SIG *ECDSA_SIG_new(void);
|
|
|
|
/* ECDSA_SIG_free frees |sig| its member |BIGNUM|s. */
|
|
OPENSSL_EXPORT void ECDSA_SIG_free(ECDSA_SIG *sig);
|
|
|
|
/* ECDSA_sign signs |digest_len| bytes from |digest| with |key| and returns the
|
|
* resulting signature structure, or NULL on error. */
|
|
OPENSSL_EXPORT ECDSA_SIG *ECDSA_do_sign(const uint8_t *digest,
|
|
size_t digest_len, EC_KEY *key);
|
|
|
|
/* ECDSA_verify verifies that |sig| constitutes a valid signature by |key| of
|
|
* |digest|. It returns one on success or zero if the signature is invalid or
|
|
* on error. */
|
|
OPENSSL_EXPORT int ECDSA_do_verify(const uint8_t *digest, size_t digest_len,
|
|
const ECDSA_SIG *sig, EC_KEY *key);
|
|
|
|
|
|
/* Signing with precomputation.
|
|
*
|
|
* Parts of the ECDSA signature can be independent of the message to be signed
|
|
* thus it's possible to precompute them and reduce the signing latency.
|
|
*
|
|
* TODO(fork): remove support for this as it cannot support safe-randomness. */
|
|
|
|
/* ECDSA_sign_setup precomputes parts of an ECDSA signing operation. It sets
|
|
* |*kinv| and |*rp| to the precomputed values and uses the |ctx| argument, if
|
|
* not NULL. It returns one on success and zero otherwise. */
|
|
OPENSSL_EXPORT int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv,
|
|
BIGNUM **rp);
|
|
|
|
/* ECDSA_do_sign_ex is the same as |ECDSA_do_sign| but takes precomputed values
|
|
* as generated by |ECDSA_sign_setup|. */
|
|
OPENSSL_EXPORT ECDSA_SIG *ECDSA_do_sign_ex(const uint8_t *digest,
|
|
size_t digest_len,
|
|
const BIGNUM *kinv, const BIGNUM *rp,
|
|
EC_KEY *eckey);
|
|
|
|
/* ECDSA_sign_ex is the same as |ECDSA_sign| but takes precomputed values as
|
|
* generated by |ECDSA_sign_setup|. */
|
|
OPENSSL_EXPORT int ECDSA_sign_ex(int type, const uint8_t *digest,
|
|
size_t digest_len, uint8_t *sig,
|
|
unsigned int *sig_len, const BIGNUM *kinv,
|
|
const BIGNUM *rp, EC_KEY *eckey);
|
|
|
|
|
|
/* ASN.1 functions. */
|
|
|
|
/* d2i_ECDSA_SIG parses an ASN.1, DER-encoded, signature from |len| bytes at
|
|
* |*inp|. If |out| is not NULL then, on exit, a pointer to the result is in
|
|
* |*out|. If |*out| is already non-NULL on entry then the result is written
|
|
* directly into |*out|, otherwise a fresh |ECDSA_SIG| is allocated. On
|
|
* successful exit, |*inp| is advanced past the DER structure. It returns the
|
|
* result or NULL on error. */
|
|
OPENSSL_EXPORT ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **out, const uint8_t **inp,
|
|
long len);
|
|
|
|
/* i2d_ECDSA_SIG marshals a signature from |sig| to an ASN.1, DER
|
|
* structure. If |outp| is not NULL then the result is written to |*outp| and
|
|
* |*outp| is advanced just past the output. It returns the number of bytes in
|
|
* the result, whether written or not, or a negative value on error. */
|
|
OPENSSL_EXPORT int i2d_ECDSA_SIG(const ECDSA_SIG *sig, uint8_t **outp);
|
|
|
|
|
|
#if defined(__cplusplus)
|
|
} /* extern C */
|
|
#endif
|
|
|
|
#define ECDSA_F_ECDSA_do_sign_ex 100
|
|
#define ECDSA_F_ECDSA_do_verify 101
|
|
#define ECDSA_F_ECDSA_sign_ex 102
|
|
#define ECDSA_F_digest_to_bn 103
|
|
#define ECDSA_F_ecdsa_sign_setup 104
|
|
#define ECDSA_R_BAD_SIGNATURE 100
|
|
#define ECDSA_R_MISSING_PARAMETERS 101
|
|
#define ECDSA_R_NEED_NEW_SETUP_VALUES 102
|
|
#define ECDSA_R_NOT_IMPLEMENTED 103
|
|
#define ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED 104
|
|
|
|
#endif /* OPENSSL_HEADER_ECDSA_H */
|
|
|