英文:
Golang: How do I decrypt with DES, CBC, and PKCS7?
问题
目前正在努力弄清楚为什么我的解密方法不起作用。我使用了DES、CBC和PKCS7Padding来加密我的字符串。我的当前代码在解密过程中输出panic: crypto/cipher: input not full blocks。
英文:
Currently trying to figure out why my decryption method is not working. I used DES, CBC, and PKCS7Padding to encrypt my string. My current code outputs panic: crypto/cipher: input not full blocks during decryption.
答案1
得分: 8
伙计，它完全正常工作。
package main
import (
"bytes"
"crypto/des"
"crypto/cipher"
"fmt"
)
func DesEncryption(key, iv, plainText []byte) ([]byte, error) {
block, err := des.NewCipher(key)
if err != nil {
return nil, err
}
blockSize := block.BlockSize()
origData := PKCS5Padding(plainText, blockSize)
blockMode := cipher.NewCBCEncrypter(block, iv)
cryted := make([]byte, len(origData))
blockMode.CryptBlocks(cryted, origData)
return cryted, nil
}
func DesDecryption(key, iv, cipherText []byte) ([]byte, error) {
block, err := des.NewCipher(key)
if err != nil {
return nil, err
}
blockMode := cipher.NewCBCDecrypter(block, iv)
origData := make([]byte, len(cipherText))
blockMode.CryptBlocks(origData, cipherText)
origData = PKCS5UnPadding(origData)
return origData, nil
}
func PKCS5Padding(src []byte, blockSize int) []byte {
padding := blockSize - len(src)%blockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(src, padtext...)
}
func PKCS5UnPadding(src []byte) []byte {
length := len(src)
unpadding := int(src[length-1])
return src[:(length - unpadding)]
}
func main() {
originalText := "sysys"
fmt.Println(originalText)
mytext := []byte(originalText)
key := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC }
iv := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC }
cryptoText,_ := DesEncryption(key, iv, mytext)
fmt.Println(string(cryptoText))
decryptedText,_ := DesDecryption(key, iv, cryptoText)
fmt.Println(string(decryptedText))
}
英文:
Buddy it's work completely fine.
package main
import (
"bytes"
"crypto/des"
"crypto/cipher"
"fmt"
)
func DesEncryption(key, iv, plainText []byte) ([]byte, error) {
block, err := des.NewCipher(key)
if err != nil {
return nil, err
}
blockSize := block.BlockSize()
origData := PKCS5Padding(plainText, blockSize)
blockMode := cipher.NewCBCEncrypter(block, iv)
cryted := make([]byte, len(origData))
blockMode.CryptBlocks(cryted, origData)
return cryted, nil
}
func DesDecryption(key, iv, cipherText []byte) ([]byte, error) {
block, err := des.NewCipher(key)
if err != nil {
return nil, err
}
blockMode := cipher.NewCBCDecrypter(block, iv)
origData := make([]byte, len(cipherText))
blockMode.CryptBlocks(origData, cipherText)
origData = PKCS5UnPadding(origData)
return origData, nil
}
func PKCS5Padding(src []byte, blockSize int) []byte {
padding := blockSize - len(src)%blockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(src, padtext...)
}
func PKCS5UnPadding(src []byte) []byte {
length := len(src)
unpadding := int(src[length-1])
return src[:(length - unpadding)]
}
func main() {
originalText := "sysys"
fmt.Println(originalText)
mytext := []byte(originalText)
key := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC }
iv := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC }
cryptoText,_ := DesEncryption(key, iv, mytext)
fmt.Println(string(cryptoText))
decryptedText,_ := DesDecryption(key, iv, cryptoText)
fmt.Println(string(decryptedText))
}
答案2
得分: 1
你可以这样做：
package controllers
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/hex"
"fmt"
)
func PKCS7Padding(ciphertext []byte) []byte {
padding := aes.BlockSize - len(ciphertext)%aes.BlockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(ciphertext, padtext...)
}
func PKCS7UnPadding(plantText []byte) []byte {
length := len(plantText)
unpadding := int(plantText[length-1])
return plantText[:(length - unpadding)]
}
func OpensslDecrypt(keyStr string, ivStr string, text string) string {
key, _ := hex.DecodeString(keyStr)
iv, _ := hex.DecodeString(ivStr)
ciphertext, _ := hex.DecodeString(text)
block, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
plaintext := make([]byte, len(ciphertext))
mode := cipher.NewCBCDecrypter(block, iv)
mode.CryptBlocks(plaintext, ciphertext)
plaintext = PKCS7UnPadding(plaintext)
return fmt.Sprintf("%s\n", plaintext)
}
func OpensslEncrypt(keyStr string, ivStr string, text string) string {
plaintext := []byte(text)
key, _ := hex.DecodeString(keyStr)
iv, _ := hex.DecodeString(ivStr)
plaintext = PKCS7Padding(plaintext)
ciphertext := make([]byte, len(plaintext))
block, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(ciphertext, plaintext)
return fmt.Sprintf("%x\n", ciphertext)
}
这是一个Go语言的代码示例，包含了一些加密和解密函数。它使用了AES加密算法和CBC模式。其中，OpensslDecrypt函数用于解密数据，OpensslEncrypt函数用于加密数据。这些函数依赖于PKCS7Padding和PKCS7UnPadding函数，用于进行填充和去填充操作。你可以根据需要使用这些函数进行数据的加密和解密。
英文:
you can do like this
package controllers
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/hex"
"fmt"
)
func PKCS7Padding(ciphertext []byte) []byte {
padding := aes.BlockSize - len(ciphertext) % aes.BlockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(ciphertext, padtext...)
}
func PKCS7UnPadding(plantText []byte) []byte {
length := len(plantText)
unpadding := int(plantText[length-1])
return plantText[:(length - unpadding)]
}
func OpensslDecrypt(keyStr string, ivStr string, text string) string{
key, _ := hex.DecodeString(keyStr);
iv, _ := hex.DecodeString(ivStr);
ciphertext, _ := hex.DecodeString(text);
block, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
plaintext := make([]byte,len(ciphertext))
mode := cipher.NewCBCDecrypter(block, iv)
mode.CryptBlocks(plaintext, ciphertext)
plaintext = PKCS7UnPadding(plaintext)
return fmt.Sprintf("%s\n", plaintext)
}
func OpensslEncrypt(keyStr string, ivStr string, text string) string{
plaintext := []byte(text)
key, _ := hex.DecodeString(keyStr);
iv, _ := hex.DecodeString(ivStr);
plaintext = PKCS7Padding(plaintext);
ciphertext := make([]byte,len(plaintext))
block, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(ciphertext, plaintext)
return fmt.Sprintf("%x\n", ciphertext)
}
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