golang的SHA1withRSA的实现

野性酷女 2022-10-31 00:53 178阅读 0赞

java 采用的SHA1withRSA

Google好久也没找到go的解决方案，查到某位大神说SHA1withRSA 是JAVA特有的封装，是先进行一个SHA1的散列，再进行一次RSA的加密，

1.  使用SHA散列包。这会产生一个小的32字节哈希字符串，便于快速计算
2.  使用您的私钥对该字符串进行签名

### golang解决 ###

\#\#[参考资料][Link 1]

\#\#[大神解决][Link 2]

代码

func main() {
     
    	block, _ := pem.Decode([]byte(`-----BEGIN RSA PRIVATE KEY-----
    									-----END RSA PRIVATE KEY-----
    						`))
     
    	context := "helloworld";  //需要签名的文本
     
    	if block == nil {
    		panic("私钥错误")
    		return
    	}
     
    	private,err := x509.ParsePKCS8PrivateKey(block.Bytes) //之前看java demo中使用的是pkcs8
    	if err != nil {
    		panic("PrivateKey error")
    		return
    	}
    	h := crypto.Hash.New(crypto.SHA1)  //进行SHA1的散列
    	h.Write([]byte(context))
    	hashed := h.Sum(nil)
     
    	// 进行rsa加密签名
    	signedData, err := rsa.SignPKCS1v15(rand.Reader, private.(*rsa.PrivateKey), crypto.SHA1, hashed)
     
    	data := base64.StdEncoding.EncodeToString(signedData)
     
    	fmt.Println(data)
     
    }

### \#\#转载大神的封装 ###

package common
     
    import (
    	"crypto"
    	"crypto/rand"
    	"crypto/rsa"
    	"crypto/x509"
    	"encoding/pem"
    	"fmt"
    )
     
    type SHAwithRSA struct {
    	privateKey *rsa.PrivateKey
    }
     
    func (this *SHAwithRSA) SetPriKey(pkey []byte) {
    	block, _ := pem.Decode(pkey)
    	if block == nil {
    		fmt.Println("pem.Decode err")
    		return
    	}
     
    	//private, err := x509.ParsePKCS1PrivateKey(block.Bytes)
    	private, err := x509.ParsePKCS8PrivateKey(block.Bytes)
    	if err != nil {
    		fmt.Println("ParsePKCS8PrivateKey err", err)
    		return
    	}
     
    	this.privateKey = private.(*rsa.PrivateKey)
     
    	return
    }
     
    func (this *SHAwithRSA) Sign(data string) (string, error) {
     
    	h := crypto.Hash.New(crypto.SHA1)
    	h.Write([]byte(data))
    	hashed := h.Sum(nil)
     
    	signature, err := rsa.SignPKCS1v15(rand.Reader, this.privateKey,
    		crypto.SHA1, hashed)
    	if err != nil {
    		fmt.Println("Error from signing: %s\n", err)
    		return "", err
    	}
    	sign := base64.StdEncoding.EncodeToString(signature)  //转换成base64返回
    	return sign, nil
    }

[Link 1]: https://segmentfault.com/a/1190000004151272
[Link 2]: https://my.oschina.net/mawx/blog/680681?p=%7B%7BtotalPage%7D%7D