try things

_cffi_build/build.py

@@ -27,6 +27,7 @@ modules = [
     Source('secp256k1.h', '#include <secp256k1.h>'),
     Source('secp256k1_ecdh.h', '#include <secp256k1_ecdh.h>'),
     Source('secp256k1_recovery.h', '#include <secp256k1_recovery.h>'),
+    Source('lax_der_privatekey_parsing.h', '#include <lax_der_privatekey_parsing.h>'),
 ]
 
 ffi = _mk_ffi(modules, libraries=['secp256k1'])

_cffi_build/lax_der_privatekey_parsing.h

@@ -0,0 +1,14 @@
+int ec_privkey_export_der(
+    const secp256k1_context* ctx,
+    unsigned char *privkey,
+    size_t *privkeylen,
+    const unsigned char *seckey,
+    int compressed
+) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);
+
+int ec_privkey_import_der(
+    const secp256k1_context* ctx,
+    unsigned char *seckey,
+    const unsigned char *privkey,
+    size_t privkeylen
+) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);

coincurve/_windows_libsecp256k1.py

@@ -227,11 +227,29 @@ int secp256k1_ecdh(
 );
 """
 
+DER_DEFINITIONS = """
+int ec_privkey_export_der(
+    const secp256k1_context* ctx,
+    unsigned char *privkey,
+    size_t *privkeylen,
+    const unsigned char *seckey,
+    int compressed
+) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);
+
+int ec_privkey_import_der(
+    const secp256k1_context* ctx,
+    unsigned char *seckey,
+    const unsigned char *privkey,
+    size_t privkeylen
+) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
+"""
+
 ffi = FFI()
 
 ffi.cdef(BASE_DEFINITIONS)
 ffi.cdef(RECOVERY_DEFINITIONS)
 ffi.cdef(ECDH_DEFINITIONS)
+ffi.cdef(DER_DEFINITIONS)
 
 here = os.path.dirname(os.path.abspath(__file__))
 lib = ffi.dlopen(os.path.join(here, 'libsecp256k1.dll'))

release.py

@@ -0,0 +1,50 @@
+import os
+import subprocess
+import sys
+
+import appdirs
+
+
+def main():
+    here = os.path.dirname(os.path.abspath(__file__))
+    os.chdir(here)
+
+    version = sys.argv[-1]
+    delete = not not sys.argv[-2] == '-d'
+    delete_only = not not sys.argv[-2] == '--d'
+
+    try:
+        subprocess.call('git -h')
+        git_path = 'git'
+    except:
+        git_path = None
+
+    # Assume Windows portable Git
+    if git_path is None:
+        github_dir = os.path.join(appdirs.user_data_dir(), 'GitHub')
+        for d in os.listdir(github_dir):
+            if d.startswith('PortableGit'):
+                git_path = os.path.join(github_dir, d, 'cmd', 'git.exe')
+
+    if git_path is None:
+        raise OSError('Unable to find git executable.')
+
+    cmds = [
+        '{0} tag -a {1} -m "Version {1}"'.format(git_path, version),
+        '{} push origin {}'.format(git_path, version)
+    ]
+    delete_cmd = '{} tag -d {}'.format(git_path, version)
+
+    if delete:
+        cmds.insert(0, delete_cmd)
+    elif delete_only:
+        cmds = [delete_cmd]
+
+    for cmd in cmds:
+        subprocess.call(cmd)
+
+    print(cmds)
+
+
+if __name__ == '__main__':
+    main()