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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/x509" | ||
| "encoding/pem" | ||
| "os" | ||
| ) | ||
|
|
||
| //生成RSA私钥和公钥，保存到文件中 | ||
| func GenerateRSAKey(bits int) { | ||
| //GenerateKey函数使用随机数据生成器random生成一对具有指定字位数的RSA密钥 | ||
| //Reader是一个全局、共享的密码用强随机数生成器 | ||
| privateKey, err := rsa.GenerateKey(rand.Reader, bits) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| //保存私钥 | ||
| //通过x509标准将得到的ras私钥序列化为ASN.1 的 DER编码字符串 | ||
| X509PrivateKey := x509.MarshalPKCS1PrivateKey(privateKey) | ||
| //使用pem格式对x509输出的内容进行编码 | ||
| //创建文件保存私钥 | ||
| privateFile, err := os.Create("private.pem") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer privateFile.Close() | ||
| //构建一个pem.Block结构体对象 | ||
| privateBlock := pem.Block{Type: "RSA Private Key", Bytes: X509PrivateKey} | ||
| //将数据保存到文件 | ||
| pem.Encode(privateFile, &privateBlock) | ||
|
|
||
| //保存公钥 | ||
| //获取公钥的数据 | ||
| publicKey := privateKey.PublicKey | ||
| //X509对公钥编码 | ||
| X509PublicKey, err := x509.MarshalPKIXPublicKey(&publicKey) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| //pem格式编码 | ||
| //创建用于保存公钥的文件 | ||
| publicFile, err := os.Create("public.pem") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer publicFile.Close() | ||
| //创建一个pem.Block结构体对象 | ||
| publicBlock := pem.Block{Type: "RSA Public Key", Bytes: X509PublicKey} | ||
| //保存到文件 | ||
| pem.Encode(publicFile, &publicBlock) | ||
| } | ||
|
|
||
| //RSA加密 | ||
| func RSA_Encrypt(plainText []byte, path string) []byte { | ||
| //打开文件 | ||
| file, err := os.Open(path) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer file.Close() | ||
| //读取文件的内容 | ||
| info, _ := file.Stat() | ||
| buf := make([]byte, info.Size()) | ||
| file.Read(buf) | ||
| //pem解码 | ||
| block, _ := pem.Decode(buf) | ||
| //x509解码 | ||
|
|
||
| publicKeyInterface, err := x509.ParsePKIXPublicKey(block.Bytes) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| //类型断言 | ||
| publicKey := publicKeyInterface.(*rsa.PublicKey) | ||
| //对明文进行加密 | ||
| cipherText, err := rsa.EncryptPKCS1v15(rand.Reader, publicKey, plainText) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| //返回密文 | ||
| return cipherText | ||
| } | ||
|
|
||
| //RSA解密 | ||
| func RSA_Decrypt(cipherText []byte, path string) []byte { | ||
| //打开文件 | ||
| file, err := os.Open(path) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer file.Close() | ||
| //获取文件内容 | ||
| info, _ := file.Stat() | ||
| buf := make([]byte, info.Size()) | ||
| file.Read(buf) | ||
| //pem解码 | ||
| block, _ := pem.Decode(buf) | ||
| //X509解码 | ||
| privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| //对密文进行解密 | ||
| plainText, _ := rsa.DecryptPKCS1v15(rand.Reader, privateKey, cipherText) | ||
| //返回明文 | ||
| return plainText | ||
| } |
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