--- /dev/null
+/* ====================================================================
+ * 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 verifying.
+
+// 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, const 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
+// occurred.
+OPENSSL_EXPORT int ECDSA_verify(int type, const uint8_t *digest,
+ size_t digest_len, const uint8_t *sig,
+ size_t sig_len, const 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_SIG_get0 sets |*out_r| and |*out_s|, if non-NULL, to the two
+// components of |sig|.
+OPENSSL_EXPORT void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **out_r,
+ const BIGNUM **out_s);
+
+// ECDSA_SIG_set0 sets |sig|'s components to |r| and |s|, neither of which may
+// be NULL. On success, it takes ownership of each argument and returns one.
+// Otherwise, it returns zero.
+OPENSSL_EXPORT int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
+
+// ECDSA_do_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, const EC_KEY *key);
+
+// ECDSA_do_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, const EC_KEY *key);
+
+
+// ASN.1 functions.
+
+// ECDSA_SIG_parse parses a DER-encoded ECDSA-Sig-Value structure from |cbs| and
+// advances |cbs|. It returns a newly-allocated |ECDSA_SIG| or NULL on error.
+OPENSSL_EXPORT ECDSA_SIG *ECDSA_SIG_parse(CBS *cbs);
+
+// ECDSA_SIG_from_bytes parses |in| as a DER-encoded ECDSA-Sig-Value structure.
+// It returns a newly-allocated |ECDSA_SIG| structure or NULL on error.
+OPENSSL_EXPORT ECDSA_SIG *ECDSA_SIG_from_bytes(const uint8_t *in,
+ size_t in_len);
+
+// ECDSA_SIG_marshal marshals |sig| as a DER-encoded ECDSA-Sig-Value and appends
+// the result to |cbb|. It returns one on success and zero on error.
+OPENSSL_EXPORT int ECDSA_SIG_marshal(CBB *cbb, const ECDSA_SIG *sig);
+
+// ECDSA_SIG_to_bytes marshals |sig| as a DER-encoded ECDSA-Sig-Value and, on
+// success, sets |*out_bytes| to a newly allocated buffer containing the result
+// and returns one. Otherwise, it returns zero. The result should be freed with
+// |OPENSSL_free|.
+OPENSSL_EXPORT int ECDSA_SIG_to_bytes(uint8_t **out_bytes, size_t *out_len,
+ const ECDSA_SIG *sig);
+
+// ECDSA_SIG_max_len returns the maximum length of a DER-encoded ECDSA-Sig-Value
+// structure for a group whose order is represented in |order_len| bytes, or
+// zero on overflow.
+OPENSSL_EXPORT size_t ECDSA_SIG_max_len(size_t order_len);
+
+
+// Deprecated 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|. Note that, even if |*out| is already non-NULL on entry, it will not
+// be written to. Rather, a fresh |ECDSA_SIG| is allocated and the previous one
+// is freed. 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
+
+extern "C++" {
+
+namespace bssl {
+
+BORINGSSL_MAKE_DELETER(ECDSA_SIG, ECDSA_SIG_free)
+
+} // namespace bssl
+
+} // extern C++
+
+#endif
+
+#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
+#define ECDSA_R_ENCODE_ERROR 105
+
+#endif // OPENSSL_HEADER_ECDSA_H
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