go实现wordpress密码加密

这两天帮一个朋友写的wordpress密码加密代码，这里保存一份

package main

import (
    "crypto/md5"
    "fmt"
)

func main() {
    //wordpress数据库密码$P$B12345678.8beAbNGrptg9h4PwkOt9. 明文密码为 admin123
    //我们把密码拆分为"$P$B与12345678与后22位
    var top string = "$P$B"        //密码前四位，php中固定格式
    var salt string = "12345678"   //salt为php中未随机生成8位字符串
    var passwd string = "admin123" //明文密码
    var itoa64 string = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
    a := salt + passwd
    has := md5.New()
    has.Write([]byte(a))
    b := string(has.Sum(nil))
    for i := 1; i <= 8192; i++ {
        a = b + passwd
        has = md5.New()
        has.Write([]byte(a))
        b = string(has.Sum(nil))
    }
    var input string = b
    var count int = 16
    var output string
    for i := 0; i < count; i++ {
        var value int
        value = int(input[i])
        output = output + itoa64[(value&0x3f):(value&0x3f)+1]
        i++
        if i < count {
            value = int(value) + (int(input[i]) << 8)
        }
        output = output + itoa64[((value>>6)&0x3f):((value>>6)&0x3f)+1]
        if i > count {
            break
        }
        i++
        if i < count {
            value = int(value) + (int(input[i]) << 16)
        }
        output = output + itoa64[((value>>12)&0x3f):((value>>12)&0x3f)+1]
        if i > count {
            break
        }
        output = output + itoa64[((value>>18)&0x3f):((value>>18)&0x3f)+1]
    }
    output = top + salt + output[0:22]
    fmt.Println(output)
    //打印输出 $P$B12345678.8beAbNGrptg9h4PwkOt9.
}

go语言最近才开始学习的，代码写得很low
完美封装可以看我朋友封装的
代码地址