mirror of
https://github.com/square/certigo.git
synced 2024-04-21 12:32:40 +00:00
70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
/*-
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* Copyright 2016 Square Inc.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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package jceks
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"os"
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"strings"
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)
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// LoadPEMKey extracts a private key from a PEM file.
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func LoadPEMKey(filename string) (*rsa.PrivateKey, error) {
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keyPEMBlock, err := os.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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var keyDERBlock *pem.Block
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for {
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keyDERBlock, keyPEMBlock = pem.Decode(keyPEMBlock)
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if keyDERBlock == nil {
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return nil, fmt.Errorf("failed to parse key PEM data")
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}
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if keyDERBlock.Type == "PRIVATE KEY" ||
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strings.HasSuffix(keyDERBlock.Type, " PRIVATE KEY") {
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break
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}
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}
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return x509.ParsePKCS1PrivateKey(keyDERBlock.Bytes)
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}
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// LoadPEMCert extracts a certificate from a PEM file.
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func LoadPEMCert(filename string) (*x509.Certificate, error) {
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certPEMBlock, err := os.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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var certDERBlock *pem.Block
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for {
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certDERBlock, certPEMBlock = pem.Decode(certPEMBlock)
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if certDERBlock == nil {
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return nil, fmt.Errorf("failed to parse certificate PEM data")
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}
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if certDERBlock.Type == "CERTIFICATE" {
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break
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}
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}
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return x509.ParseCertificate(certDERBlock.Bytes)
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}
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