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/**
@author: yaoyuliang
**/
package utils
import (
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"strings"
)
func DescrySignPhone(phone string) string {
phoneSignStr, _ := AesDecryptBySaas([]byte(phone), []byte("dbcaespassword93"))
return phoneSignStr
}
func AesDecryptBySaas(crypted, key []byte) (string, error) {
ciphertext := strings.Replace(string(crypted), " ", "", -1)
cryptedOri, err := base64.StdEncoding.DecodeString(ciphertext)
if err != nil {
return "", err
}
block, err := aes.NewCipher(key)
if err != nil {
return "", err
}
blockSize := block.BlockSize()
blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
origData := make([]byte, len(cryptedOri))
// 修复过长手机号问题
if len(cryptedOri)%block.BlockSize() != 0 {
return string(crypted), nil
}
blockMode.CryptBlocks(origData, cryptedOri)
origData = PKCS7UnPadding(origData)
return string(origData), nil
}
func PKCS7UnPadding(origData []byte) []byte {
length := len(origData)
unpadding := int(origData[length-1])
return origData[:(length - unpadding)]
}