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curve25519_parse.go
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curve25519_parse.go
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package curve25519
import (
"errors"
"crypto"
"encoding/pem"
cryptobin_pkcs8 "github.com/deatil/go-cryptobin/pkcs8"
cryptobin_pkcs8pbe "github.com/deatil/go-cryptobin/pkcs8pbe"
"github.com/deatil/go-cryptobin/dhd/curve25519"
)
var (
ErrKeyMustBePEMEncoded = errors.New("invalid key: Key must be a PEM encoded PKCS1 or PKCS8 key")
ErrNotPrivateKey = errors.New("key is not a valid curve25519 private key")
ErrNotPublicKey = errors.New("key is not a valid curve25519 public key")
)
// 解析私钥
func (this Curve25519) ParsePrivateKeyFromPEM(key []byte) (crypto.PrivateKey, error) {
var err error
// Parse PEM block
var block *pem.Block
if block, _ = pem.Decode(key); block == nil {
return nil, ErrKeyMustBePEMEncoded
}
// Parse the key
var parsedKey any
if parsedKey, err = curve25519.ParsePrivateKey(block.Bytes); err != nil {
return nil, err
}
var pkey *curve25519.PrivateKey
var ok bool
if pkey, ok = parsedKey.(*curve25519.PrivateKey); !ok {
return nil, ErrNotPrivateKey
}
return pkey, nil
}
// 解析私钥带密码
func (this Curve25519) ParsePrivateKeyFromPEMWithPassword(key []byte, password string) (crypto.PrivateKey, error) {
var err error
// Parse PEM block
var block *pem.Block
if block, _ = pem.Decode(key); block == nil {
return nil, ErrKeyMustBePEMEncoded
}
var parsedKey any
var blockDecrypted []byte
if blockDecrypted, err = cryptobin_pkcs8.DecryptPKCS8PrivateKey(block.Bytes, []byte(password)); err != nil {
if blockDecrypted, err = cryptobin_pkcs8pbe.DecryptPKCS8PrivateKey(block.Bytes, []byte(password)); err != nil {
return nil, err
}
}
if parsedKey, err = curve25519.ParsePrivateKey(blockDecrypted); err != nil {
return nil, err
}
var pkey *curve25519.PrivateKey
var ok bool
if pkey, ok = parsedKey.(*curve25519.PrivateKey); !ok {
return nil, ErrNotPrivateKey
}
return pkey, nil
}
// 解析公钥
func (this Curve25519) ParsePublicKeyFromPEM(key []byte) (crypto.PublicKey, error) {
var err error
// Parse PEM block
var block *pem.Block
if block, _ = pem.Decode(key); block == nil {
return nil, ErrKeyMustBePEMEncoded
}
// Parse the key
var parsedKey any
if parsedKey, err = curve25519.ParsePublicKey(block.Bytes); err != nil {
return nil, err
}
var pkey *curve25519.PublicKey
var ok bool
if pkey, ok = parsedKey.(*curve25519.PublicKey); !ok {
return nil, ErrNotPublicKey
}
return pkey, nil
}