42 lines
1.5 KiB
Go
42 lines
1.5 KiB
Go
// mautrix-signal - A Matrix-signal puppeting bridge.
|
|
// Copyright (C) 2023 Sumner Evans
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
package libsignalgo
|
|
|
|
/*
|
|
#cgo LDFLAGS: -lsignal_ffi -ldl -lm
|
|
#include "./libsignal-ffi.h"
|
|
*/
|
|
import "C"
|
|
import (
|
|
"runtime"
|
|
"unsafe"
|
|
)
|
|
|
|
func HKDFDerive(outputLength int, inputKeyMaterial, salt, info []byte) ([]byte, error) {
|
|
output := BorrowedMutableBuffer(outputLength)
|
|
signalFfiError := C.signal_hkdf_derive(output, BytesToBuffer(inputKeyMaterial), BytesToBuffer(info), BytesToBuffer(salt))
|
|
runtime.KeepAlive(inputKeyMaterial)
|
|
runtime.KeepAlive(salt)
|
|
runtime.KeepAlive(info)
|
|
if signalFfiError != nil {
|
|
return nil, wrapError(signalFfiError)
|
|
}
|
|
// No need to wrap this in a CopyBufferToBytes since this is allocated by
|
|
// Go and thus will be properly garbage collected.
|
|
return C.GoBytes(unsafe.Pointer(output.base), C.int(output.length)), nil
|
|
}
|