71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package tools
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import (
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"crypto"
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"crypto/rand"
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"crypto/rsa"
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"crypto/sha256"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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"errors"
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)
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// RSA2私钥签名
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func Rsa2PriSign(signContent string, privateKey string, hash crypto.Hash) string {
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shaNew := hash.New()
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shaNew.Write([]byte(signContent))
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hashed := shaNew.Sum(nil)
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priKey, err := ParsePrivateKey(privateKey)
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if err != nil {
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return ""
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}
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signature, err := rsa.SignPKCS1v15(rand.Reader, priKey, hash, hashed)
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if err != nil {
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return ""
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}
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return base64.StdEncoding.EncodeToString(signature)
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}
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// 解析私钥
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func ParsePrivateKey(privateKey string) (*rsa.PrivateKey, error) {
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block, _ := pem.Decode([]byte(privateKey))
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if block == nil {
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return nil, errors.New("私钥信息错误！")
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}
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priKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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return priKey, nil
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}
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// RSA2公钥验证签名
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func Rsa2PubCheckSign(source, sign, publicKey string, hash crypto.Hash) (bool, error) {
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hashed := sha256.Sum256([]byte(source))
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pubKey, err := ParsePublicKey(publicKey)
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if err != nil {
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return false, err
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}
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sig, _ := base64.StdEncoding.DecodeString(sign)
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err = rsa.VerifyPKCS1v15(pubKey, hash, hashed[:], sig)
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if err != nil {
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return false, err
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}
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return true, nil
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}
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// 解析公钥
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func ParsePublicKey(publicKey string) (*rsa.PublicKey, error) {
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block, _ := pem.Decode([]byte(publicKey))
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if block == nil {
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return nil, errors.New("公钥信息错误！")
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}
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pubKey, err := x509.ParsePKIXPublicKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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return pubKey.(*rsa.PublicKey), nil
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}
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