102 lines
3.4 KiB
Go
102 lines
3.4 KiB
Go
// mautrix-signal - A Matrix-signal puppeting bridge.
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// Copyright (C) 2023 Scott Weber
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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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#cgo LDFLAGS: -lsignal_ffi -ldl -lm
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#include "./libsignal-ffi.h"
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#include <stdlib.h>
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*/
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import "C"
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import (
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"fmt"
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"unsafe"
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"github.com/google/uuid"
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)
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// type AuthCredential [C.SignalAUTH_CREDENTIAL_LEN]byte
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// type AuthCredentialResponse [C.SignalAUTH_CREDENTIAL_RESPONSE_LEN]byte
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type AuthCredentialWithPni [C.SignalAUTH_CREDENTIAL_WITH_PNI_LEN]byte
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type AuthCredentialWithPniResponse [C.SignalAUTH_CREDENTIAL_WITH_PNI_RESPONSE_LEN]byte
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type AuthCredentialPresentation []byte
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func (ac *AuthCredentialWithPni) Slice() []byte {
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return (*ac)[:]
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}
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func ReceiveAuthCredentialWithPni(
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serverPublicParams *ServerPublicParams,
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aci uuid.UUID,
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pni uuid.UUID,
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redemptionTime uint64,
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authCredResponse AuthCredentialWithPniResponse,
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) (*AuthCredentialWithPni, error) {
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var c_result C.SignalOwnedBuffer = C.SignalOwnedBuffer{}
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signalFfiError := C.signal_server_public_params_receive_auth_credential_with_pni_as_service_id(
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&c_result,
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serverPublicParams,
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NewACIServiceID(aci).CFixedBytes(),
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NewPNIServiceID(pni).CFixedBytes(),
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C.uint64_t(redemptionTime),
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BytesToBuffer(authCredResponse[:]),
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)
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if signalFfiError != nil {
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return nil, wrapError(signalFfiError)
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}
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resultBytes := CopySignalOwnedBufferToBytes(c_result)
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if len(resultBytes) != C.SignalAUTH_CREDENTIAL_WITH_PNI_LEN {
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return nil, fmt.Errorf("invalid response length %d (expected %d)", len(resultBytes), C.SignalAUTH_CREDENTIAL_WITH_PNI_LEN)
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}
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return (*AuthCredentialWithPni)(resultBytes), nil
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}
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func NewAuthCredentialWithPniResponse(b []byte) (*AuthCredentialWithPniResponse, error) {
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borrowedBuffer := BytesToBuffer(b)
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signalFfiError := C.signal_auth_credential_with_pni_response_check_valid_contents(borrowedBuffer)
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if signalFfiError != nil {
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return nil, wrapError(signalFfiError)
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}
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authCred := AuthCredentialWithPniResponse(b)
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return &authCred, nil
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}
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func CreateAuthCredentialWithPniPresentation(
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serverPublicParams *ServerPublicParams,
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randomness Randomness,
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groupSecretParams GroupSecretParams,
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authCredWithPni AuthCredentialWithPni,
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) (*AuthCredentialPresentation, error) {
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var c_result C.SignalOwnedBuffer = C.SignalOwnedBuffer{}
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c_randomness := (*[C.SignalRANDOMNESS_LEN]C.uchar)(unsafe.Pointer(&randomness[0]))
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c_groupSecretParams := (*[C.SignalGROUP_SECRET_PARAMS_LEN]C.uchar)(unsafe.Pointer(&groupSecretParams[0]))
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signalFfiError := C.signal_server_public_params_create_auth_credential_with_pni_presentation_deterministic(
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&c_result,
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serverPublicParams,
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c_randomness,
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c_groupSecretParams,
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BytesToBuffer(authCredWithPni[:]),
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)
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if signalFfiError != nil {
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return nil, wrapError(signalFfiError)
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}
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result := AuthCredentialPresentation(CopySignalOwnedBufferToBytes(c_result))
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return &result, nil
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}
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