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55
tools/aes.go
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55
tools/aes.go
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package tools
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import (
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"bytes"
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"crypto/aes"
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"crypto/cipher"
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)
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var Aeskey = []byte("snowywar12345678") //aeskey
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//@brief:填充明文
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func PKCS5Padding(plaintext []byte, blockSize int) []byte{
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padding := blockSize-len(plaintext)%blockSize
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padtext := bytes.Repeat([]byte{byte(padding)},padding)
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return append(plaintext,padtext...)
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}
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//@brief:去除填充数据
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func PKCS5UnPadding(origData []byte) []byte{
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length := len(origData)
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unpadding := int(origData[length-1])
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return origData[:(length - unpadding)]
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}
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//@brief:AES加密
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func AesEncrypt(origData, key []byte) ([]byte, error){
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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//AES分组长度为128位,所以blockSize=16,单位字节
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blockSize := block.BlockSize()
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origData = PKCS5Padding(origData,blockSize)
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blockMode := cipher.NewCBCEncrypter(block,key[:blockSize]) //初始向量的长度必须等于块block的长度16字节
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crypted := make([]byte, len(origData))
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blockMode.CryptBlocks(crypted,origData)
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return crypted, nil
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}
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//@brief:AES解密
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func AesDecrypt(crypted, key []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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//AES分组长度为128位,所以blockSize=16,单位字节
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blockSize := block.BlockSize()
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blockMode := cipher.NewCBCDecrypter(block, key[:blockSize]) //初始向量的长度必须等于块block的长度16字节
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origData := make([]byte, len(crypted))
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blockMode.CryptBlocks(origData, crypted)
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origData = PKCS5UnPadding(origData)
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return origData, nil
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}
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14
tools/checkid.go
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14
tools/checkid.go
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package tools
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import "regexp"
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// CheckID 验证id是否为非负正整数。
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func CheckID(id string) bool {
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if id == "1" {
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return false
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}
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pattern := `^[1-9]\d*$`
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reg := regexp.MustCompile(pattern)
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return reg.MatchString(id)
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}
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13
tools/md5.go
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13
tools/md5.go
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package tools
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import (
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"crypto/md5"
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"encoding/hex"
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)
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func MD5(v string)string{
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d := []byte(v)
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m := md5.New()
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m.Write(d)
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return hex.EncodeToString(m.Sum(nil))
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}
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35
tools/token.go
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35
tools/token.go
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package tools
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import (
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"crypto/rand"
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"fmt"
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"io"
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"time"
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)
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// Random 生成随机数。
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func Random() []byte {
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b := make([]byte, 32)
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//ReadFull从rand.Reader精确地读取len(b)字节数据填充进b
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//rand.Reader是一个全局、共享的密码用强随机数生成器
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if _, err := io.ReadFull(rand.Reader, b); err != nil {
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fmt.Printf("random number generation error: %v", err)
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}
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return b
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}
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// Token 生成随机token。
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func Token() string {
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b := Random()[:16]
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return fmt.Sprintf("%x", b)
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}
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// Timestamp 用于获取当前10位数时间戳。
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func Timestamp() int {
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// time_zone := time.FixedZone("UTC", 0)
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// t := time.Now().In(time_zone).Unix()
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t := time.Now().Unix()
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return int(t)
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}
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