2022-11-20 08:13:11 +00:00
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/*
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Copyright 2022 CAcert Inc.
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SPDX-License-Identifier: Apache-2.0
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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2022-09-18 10:17:27 +00:00
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package helper
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import (
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"crypto/rand"
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"fmt"
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"math/big"
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)
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// GenerateRandomSerial generates a random serial number to be used in X.509 certificates. The implementation is
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// compliant to https://www.rfc-editor.org/rfc/rfc5280#section-4.1.2.2.
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func GenerateRandomSerial() (*big.Int, error) {
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2022-11-20 08:13:11 +00:00
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serial, err := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 160)) //nolint:gomnd
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2022-09-18 10:17:27 +00:00
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if err != nil {
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return nil, fmt.Errorf("could not generate random serial number: %w", err)
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}
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return serial, nil
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}
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