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load.go
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load.go
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package pki
import (
"crypto"
"crypto/x509"
"encoding/pem"
"fmt"
)
// LoadX509Certificate loads a x509.Certificate object from the given bytes
func LoadX509Certificate(cert []byte) (*x509.Certificate, error) {
cpb, _ := pem.Decode(cert)
crt, err := x509.ParseCertificate(cpb.Bytes)
if err != nil {
return nil, err
}
return crt, nil
}
// DecodePrivateKeyBytes will decode a PEM encoded private key into a crypto.Signer.
// It supports RSA private keys only. All other types will return err.
func DecodePrivateKeyBytes(keyBytes []byte) (crypto.Signer, error) {
// decode the private key pem
block, _ := pem.Decode(keyBytes)
if block == nil {
return nil, fmt.Errorf("error decoding private key PEM block")
}
switch block.Type {
case "PRIVATE KEY":
key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
if err != nil {
return nil, fmt.Errorf("error parsing pkcs#8 private key: %s", err.Error())
}
signer, ok := key.(crypto.Signer)
if !ok {
return nil, fmt.Errorf("error parsing pkcs#8 private key: invalid key type")
}
return signer, nil
case "RSA PRIVATE KEY":
key, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, fmt.Errorf("error parsing rsa private key: %s", err.Error())
}
err = key.Validate()
if err != nil {
return nil, fmt.Errorf("rsa private key failed validation: %s", err.Error())
}
return key, nil
default:
return nil, fmt.Errorf("unknown private key type: %s", block.Type)
}
}