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