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package rsa
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"io/ioutil"
"strings"
)
type Key interface {
PublicKey() *rsa.PublicKey
PrivateKey() *rsa.PrivateKey
Modulus() int
}
func ParsePKCS8Key(publicKey, privateKey []byte) (Key, error) {
puk, err := x509.ParsePKIXPublicKey(publicKey)
if err != nil {
return nil, err
}
prk, err := x509.ParsePKCS8PrivateKey(privateKey)
if err != nil {
return nil, err
}
return &key{publicKey: puk.(*rsa.PublicKey), privateKey: prk.(*rsa.PrivateKey)}, nil
}
func ParsePKCS1Key(publicKey, privateKey []byte) (Key, error) {
puk, err := x509.ParsePKIXPublicKey(publicKey)
if err != nil {
return nil, err
}
prk, err := x509.ParsePKCS1PrivateKey(privateKey)
if err != nil {
return nil, err
}
return &key{publicKey: puk.(*rsa.PublicKey), privateKey: prk}, nil
}
func LoadKeyFromPEMFile(publicKeyFilePath, privateKeyFilePath string, ParseKey func([]byte, []byte) (Key, error)) (Key, error) {
//TODO 断言如果入参为"" ,则直接报错
publicKeyFilePath = strings.TrimSpace(publicKeyFilePath)
pukBytes, err := ioutil.ReadFile(publicKeyFilePath)
if err != nil {
return nil, err
}
puk, _ := pem.Decode(pukBytes)
if puk == nil {
return nil, errors.New("publicKey is not pem formate")
}
privateKeyFilePath = strings.TrimSpace(privateKeyFilePath)
prkBytes, err := ioutil.ReadFile(privateKeyFilePath)
if err != nil {
return nil, err
}
prk, _ := pem.Decode(prkBytes)
if prk == nil {
return nil, errors.New("privateKey is not pem formate")
}
return ParseKey(puk.Bytes, prk.Bytes)
}
func ParsePKCS1KeyPublic(publicKey []byte) (Key, error) {
puk, err := x509.ParsePKIXPublicKey(publicKey)
if err != nil {
return nil, err
}
return &key{publicKey: puk.(*rsa.PublicKey)}, nil
}
func ParsePKCS1KeyPrivate(privateKey []byte) (Key, error) {
prk, err := x509.ParsePKCS1PrivateKey(privateKey)
if err != nil {
return nil, err
}
return &key{privateKey: prk}, nil
}
type key struct {
publicKey *rsa.PublicKey
privateKey *rsa.PrivateKey
}
func (key *key) Modulus() int {
return len(key.publicKey.N.Bytes())
}
func (key *key) PublicKey() *rsa.PublicKey {
return key.publicKey
}
func (key *key) PrivateKey() *rsa.PrivateKey {
return key.privateKey
}
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