crypto: use go-ethereum secp256k1 package to avoid symbol conflict (#374)

1 files changed, 0 insertions, 91 deletions

diff --git a/crypto/secp256k1/libsecp256k1/contrib/lax_der_parsing.h b/crypto/secp256k1/libsecp256k1/contrib/lax_der_parsing.h
deleted file mode 100644
index 6d27871a7..000000000
--- a/crypto/secp256k1/libsecp256k1/contrib/lax_der_parsing.h
+++ /dev/null
@@ -1,91 +0,0 @@
-/**********************************************************************
- * Copyright (c) 2015 Pieter Wuille                                   *
- * Distributed under the MIT software license, see the accompanying   *
- * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
- **********************************************************************/
-
-/****
- * Please do not link this file directly. It is not part of the libsecp256k1
- * project and does not promise any stability in its API, functionality or
- * presence. Projects which use this code should instead copy this header
- * and its accompanying .c file directly into their codebase.
- ****/
-
-/* This file defines a function that parses DER with various errors and
- * violations. This is not a part of the library itself, because the allowed
- * violations are chosen arbitrarily and do not follow or establish any
- * standard.
- *
- * In many places it matters that different implementations do not only accept
- * the same set of valid signatures, but also reject the same set of signatures.
- * The only means to accomplish that is by strictly obeying a standard, and not
- * accepting anything else.
- *
- * Nonetheless, sometimes there is a need for compatibility with systems that
- * use signatures which do not strictly obey DER. The snippet below shows how
- * certain violations are easily supported. You may need to adapt it.
- *
- * Do not use this for new systems. Use well-defined DER or compact signatures
- * instead if you have the choice (see secp256k1_ecdsa_signature_parse_der and
- * secp256k1_ecdsa_signature_parse_compact).
- *
- * The supported violations are:
- * - All numbers are parsed as nonnegative integers, even though X.609-0207
- *   section 8.3.3 specifies that integers are always encoded as two's
- *   complement.
- * - Integers can have length 0, even though section 8.3.1 says they can't.
- * - Integers with overly long padding are accepted, violation section
- *   8.3.2.
- * - 127-byte long length descriptors are accepted, even though section
- *   8.1.3.5.c says that they are not.
- * - Trailing garbage data inside or after the signature is ignored.
- * - The length descriptor of the sequence is ignored.
- *
- * Compared to for example OpenSSL, many violations are NOT supported:
- * - Using overly long tag descriptors for the sequence or integers inside,
- *   violating section 8.1.2.2.
- * - Encoding primitive integers as constructed values, violating section
- *   8.3.1.
- */
-
-#ifndef _SECP256K1_CONTRIB_LAX_DER_PARSING_H_
-#define _SECP256K1_CONTRIB_LAX_DER_PARSING_H_
-
-#include <secp256k1.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-/** Parse a signature in "lax DER" format
- *
- *  Returns: 1 when the signature could be parsed, 0 otherwise.
- *  Args: ctx:      a secp256k1 context object
- *  Out:  sig:      a pointer to a signature object
- *  In:   input:    a pointer to the signature to be parsed
- *        inputlen: the length of the array pointed to be input
- *
- *  This function will accept any valid DER encoded signature, even if the
- *  encoded numbers are out of range. In addition, it will accept signatures
- *  which violate the DER spec in various ways. Its purpose is to allow
- *  validation of the Bitcoin blockchain, which includes non-DER signatures
- *  from before the network rules were updated to enforce DER. Note that
- *  the set of supported violations is a strict subset of what OpenSSL will
- *  accept.
- *
- *  After the call, sig will always be initialized. If parsing failed or the
- *  encoded numbers are out of range, signature validation with it is
- *  guaranteed to fail for every message and public key.
- */
-int ecdsa_signature_parse_der_lax(
-    const secp256k1_context* ctx,
-    secp256k1_ecdsa_signature* sig,
-    const unsigned char *input,
-    size_t inputlen
-) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif