52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
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package utils
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import (
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"strings"
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)
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// 从证书文件中提取公钥
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func getPublicKey(certPath string) (string, error) {
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// 读取证书文件内容
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certData, err := ioutil.ReadFile(certPath)
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if err != nil {
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return "", fmt.Errorf("failed to read certificate file: %w", err)
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}
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// 解码 PEM 编码的证书
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block, _ := pem.Decode(certData)
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if block == nil {
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return "", fmt.Errorf("failed to decode PEM block")
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}
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// 解析证书
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cert, err := x509.ParseCertificate(block.Bytes)
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if err != nil {
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return "", fmt.Errorf("failed to parse certificate: %w", err)
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}
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// 获取公钥
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pubKey := cert.PublicKey
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// 转换公钥为 PEM 格式
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pubKeyBytes, err := x509.MarshalPKIXPublicKey(pubKey)
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if err != nil {
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return "", fmt.Errorf("failed to marshal public key: %w", err)
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}
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// 创建 PEM 块
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pemBlock := &pem.Block{
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Type: "PUBLIC KEY",
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Bytes: pubKeyBytes,
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}
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// 编码为 PEM 格式字符串
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pemBytes := pem.EncodeToMemory(pemBlock)
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publicKey := strings.TrimSpace(string(pemBytes))
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return publicKey, nil
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}
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