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engine.go
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engine.go
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// +build cgo
/*
* Copyright (c) 2017 - 2018 The GmSSL 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 GmSSL Project.
* (http://gmssl.org/)"
*
* 4. The name "GmSSL Project" must not be used to endorse or promote
* products derived from this software without prior written
* permission. For written permission, please contact
* guanzhi1980@gmail.com.
*
* 5. Products derived from this software may not be called "GmSSL"
* nor may "GmSSL" appear in their names without prior written
* permission of the GmSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the GmSSL Project
* (http://gmssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE GmSSL 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 GmSSL 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.
*/
package gmssl
/*
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/ui.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/engine.h>
*/
import "C"
import (
"errors"
"runtime"
"unsafe"
)
func GetEngineNames() []string {
engines := []string{}
C.ENGINE_load_builtin_engines()
eng := C.ENGINE_get_first()
for {
if eng == nil {
break
}
engines = append(engines, C.GoString(C.ENGINE_get_id(eng)))
eng = C.ENGINE_get_next(eng)
}
C.ENGINE_free(eng)
return engines
}
type Engine struct {
engine *C.ENGINE
}
func NewEngineByName(name string) (*Engine, error) {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
eng := C.ENGINE_by_id(cname)
if eng == nil {
return nil, GetErrors()
}
ret := &Engine{eng}
runtime.SetFinalizer(ret, func(ret *Engine) {
C.ENGINE_finish(ret.engine)
C.ENGINE_free(ret.engine)
})
if 1 != C.ENGINE_init(eng) {
return nil, GetErrors()
}
return ret, nil
}
func (e *Engine) GetCommands() ([]string, error) {
return []string{"SO_PATH"}, nil
}
func (e *Engine) RunCommand(name, arg string) error {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
carg := C.CString(arg)
defer C.free(unsafe.Pointer(carg))
if 1 != C.ENGINE_ctrl_cmd_string(e.engine, cname, carg, 0) {
return GetErrors()
}
return nil
}
func (e *Engine) LoadConfigFile(path string) error {
return errors.New("Engine.LoadConfigFile() not implemented")
}
func (e *Engine) GetPrivateKey(id string, pass string) (*PrivateKey, error) {
cid := C.CString(id)
defer C.free(unsafe.Pointer(cid))
cpass := C.CString(pass)
defer C.free(unsafe.Pointer(cpass))
sk := C.ENGINE_load_private_key(e.engine, cid, nil,
unsafe.Pointer(cpass))
if sk == nil {
return nil, GetErrors()
}
return &PrivateKey{sk}, nil
}
func (e *Engine) GetPublicKey(id string, pass string) (*PublicKey, error) {
cid := C.CString(id)
defer C.free(unsafe.Pointer(cid))
cpass := C.CString(pass)
defer C.free(unsafe.Pointer(cpass))
pk := C.ENGINE_load_public_key(e.engine, cid, nil,
unsafe.Pointer(cpass))
if pk == nil {
return nil, GetErrors()
}
return &PublicKey{pk}, nil
}