GRSA

Getting started

The key features of Gin are:

• PKCS#1
• PKCS#8
• Support Bits：512、1024、2048、3072、4096
• Support Long Text

Use GRSA

With Go module support, simply add the following import

import "github.com/hugiot/crypto/grsa"

to your code, and then go [build|run|test] will automatically fetch the necessary dependencies.

Otherwise, run the following Go command to install the grsa package:

$ go get -u github.com/hugiot/crypto/grsa

Generate Key

package main

import (
	"github.com/hugiot/crypto/grsa"
	"log"
)

func main() {
	//privateKey, publicKey, err := grsa.GenerateKey(1024, grsa.PKCS8)
	//privateKeyString, publicKeyString, err := grsa.GenerateKeyToString(1024, grsa.PKCS8)
	if err := grsa.GenerateKeyToFile(1024, grsa.PKCS8, "."); err != nil {
		log.Fatal(err)
	}
}

Get Key

package main

import "github.com/hugiot/crypto/grsa"

func main() {
	//rsaPrivateKey, _ := grsa.GetPrivateKeyFromStr("")
	//rsaPublicKey, _ := grsa.GetPublicKeyFromFile("")
	rsaPrivateKey, _ := grsa.GetPrivateKeyFromFile("./private.key")
	rsaPublicKey, _ := grsa.GetPublicKeyFromFile("./Public.key")
}

Encryption

package main

import "github.com/hugiot/crypto/grsa"

func main() {
	// use private key
	privateKey, _ := grsa.GetPrivateKeyFromFile(grsa.PrivateKeyFileName)
	ciphertext, _ := grsa.EncryptByPrivateKey(privateKey, []byte("this is content"))
	// use public key
	publicKey, _ := grsa.GetPublicKeyFromFile(grsa.PublicKeyFileName)
	ciphertext, _ := grsa.EncryptByPublicKey(publicKey, []byte("this is content"))
}

Decryption

package main

import "github.com/hugiot/crypto/grsa"

func main() {
	// use private key
	privateKey, _ := grsa.GetPrivateKeyFromFile(grsa.PrivateKeyFileName)
	plaintext, _ := grsa.DecryptByPrivateKey(privateKey, []byte("xxx"))
	// use public key
	publicKey, _ := grsa.GetPublicKeyFromFile(grsa.PublicKeyFileName)
	plaintext, _ := grsa.DecryptByPublicKey(publicKey, []byte("xxx"))
}