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utils.go
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/
utils.go
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package tls
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"github.com/pkg/errors"
)
// PrivateKeyToPem converts an rsa.PrivateKey object to pem string
func PrivateKeyToPem(key *rsa.PrivateKey) []byte {
keyInBytes := x509.MarshalPKCS1PrivateKey(key)
keyinPem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: keyInBytes,
},
)
return keyinPem
}
// CertToPem converts an x509.Certificate object to a pem string
func CertToPem(cert *x509.Certificate) []byte {
certInPem := pem.EncodeToMemory(
&pem.Block{
Type: "CERTIFICATE",
Bytes: cert.Raw,
},
)
return certInPem
}
// CSRToPem converts an x509.CertificateRequest to a pem string
func CSRToPem(cert *x509.CertificateRequest) []byte {
certInPem := pem.EncodeToMemory(
&pem.Block{
Type: "CERTIFICATE REQUEST",
Bytes: cert.Raw,
},
)
return certInPem
}
// PublicKeyToPem converts an rsa.PublicKey object to pem string
func PublicKeyToPem(key *rsa.PublicKey) ([]byte, error) {
keyInBytes, err := x509.MarshalPKIXPublicKey(key)
if err != nil {
return nil, errors.Wrap(err, "failed to MarshalPKIXPublicKey")
}
keyinPem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: keyInBytes,
},
)
return keyinPem, nil
}
// PemToPrivateKey converts a data block to rsa.PrivateKey.
func PemToPrivateKey(data []byte) (*rsa.PrivateKey, error) {
block, _ := pem.Decode(data)
if block == nil {
return nil, errors.Errorf("could not find a PEM block in the private key")
}
return x509.ParsePKCS1PrivateKey(block.Bytes)
}
// PemToCertificate converts a data block to x509.Certificate.
func PemToCertificate(data []byte) (*x509.Certificate, error) {
block, _ := pem.Decode(data)
if block == nil {
return nil, errors.Errorf("could not find a PEM block in the certificate")
}
return x509.ParseCertificate(block.Bytes)
}