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certificate.go
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certificate.go
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package goi
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"os"
"path"
)
func GenerateRSACertificate(bits int, certificateTemplate x509.Certificate, outPath string) error {
// 生成 RSA 密钥对
privateKey, err := rsa.GenerateKey(rand.Reader, bits)
if err != nil {
return err
}
privateKeyBytes := x509.MarshalPKCS1PrivateKey(privateKey)
privateKeyFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".key"))
if err != nil {
return err
}
defer privateKeyFile.Close()
// 将 RSA 私钥编码为 PEM 格式并写入文件
err = pem.Encode(privateKeyFile, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: privateKeyBytes})
if err != nil {
return err
}
// 使用证书请求模板和密钥生成证书
certificateDER, err := x509.CreateCertificate(rand.Reader, &certificateTemplate, &certificateTemplate, &privateKey.PublicKey, privateKey)
if err != nil {
return err
}
certificateFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".crt"))
if err != nil {
return err
}
defer certificateFile.Close()
err = pem.Encode(certificateFile, &pem.Block{Type: "CERTIFICATE", Bytes: certificateDER})
if err != nil {
return err
}
certificatePemFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".pem"))
if err != nil {
return err
}
defer certificatePemFile.Close()
err = pem.Encode(certificatePemFile, &pem.Block{Type: "CERTIFICATE", Bytes: certificateDER})
if err != nil {
return err
}
// 生成证书签名请求 (CSR)
csrTemplate := x509.CertificateRequest{
Subject: pkix.Name{CommonName: certificateTemplate.Subject.CommonName},
}
csrDER, err := x509.CreateCertificateRequest(rand.Reader, &csrTemplate, privateKey)
if err != nil {
return err
}
csrFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".csr"))
if err != nil {
return err
}
defer csrFile.Close()
err = pem.Encode(csrFile, &pem.Block{Type: "CERTIFICATE REQUEST", Bytes: csrDER})
if err != nil {
return err
}
return nil
}
func GenerateECCCertificate(certificateTemplate x509.Certificate, outPath string) error {
// 生成 ECC 密钥对
privateKey, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
if err != nil {
return err
}
privateKeyBytes, err := x509.MarshalECPrivateKey(privateKey)
if err != nil {
return err
}
privateKeyFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".key"))
if err != nil {
return err
}
defer privateKeyFile.Close()
// 将 ECC 私钥编码为 PEM 格式并写入文件
err = pem.Encode(privateKeyFile, &pem.Block{Type: "EC PRIVATE KEY", Bytes: privateKeyBytes})
if err != nil {
return err
}
// 使用证书请求模板和密钥生成证书
certificateDER, err := x509.CreateCertificate(rand.Reader, &certificateTemplate, &certificateTemplate, &privateKey.PublicKey, privateKey)
if err != nil {
return err
}
certificateFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".crt"))
if err != nil {
return err
}
defer certificateFile.Close()
// 将证书编码为 PEM 格式并写入文件
err = pem.Encode(certificateFile, &pem.Block{Type: "CERTIFICATE", Bytes: certificateDER})
if err != nil {
return err
}
certificatePemFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".pem"))
if err != nil {
return err
}
defer certificatePemFile.Close()
err = pem.Encode(certificatePemFile, &pem.Block{Type: "CERTIFICATE", Bytes: certificateDER})
if err != nil {
return err
}
// 生成证书签名请求 (CSR)
csrTemplate := x509.CertificateRequest{
Subject: pkix.Name{CommonName: certificateTemplate.Subject.CommonName},
}
csrDER, err := x509.CreateCertificateRequest(rand.Reader, &csrTemplate, privateKey)
if err != nil {
return err
}
csrFile, err := os.Create(path.Join(outPath, certificateTemplate.Subject.CommonName+".csr"))
if err != nil {
return err
}
defer csrFile.Close()
err = pem.Encode(csrFile, &pem.Block{Type: "CERTIFICATE REQUEST", Bytes: csrDER})
if err != nil {
return err
}
return nil
}