#include?
#include?
#include?“base64.h“


/*************************************************
Function:???????base64_to_ascii
Description:????decodes?string?from?base64?to?ascii
Input:??????????const?char?*in:?the?input?string?（NIL-terminated）
int?inlen:?length?of?input?string
int?maxlen:?the?output?buffer?size?limit?0?to?ignore
Output:?????????unsigned?char?*out:?decoded?output?string
Return:?????????length?of?output?string?on?successful
less?than?0?on?error?occur?then?the?output?is?invalid
Others:?????????
?*************************************************/
//int?base64_decode（unsigned?char?*out?const?unsigned?char?*in?int?inlen?int?maxlen）?{
int?base64_decode（unsigned?char?*out?unsigned?char?*in?int?inlen?int?maxlen）?{
????//~int?inlen?=?strlen?（in）;
????int?outlen?=?0;
????int?over?=?0;?//?decode?over?flag
????register?char?digit0?digit1?digit2?digit3;
????unsigned?char?*out_org?=?out;
????memset（out?0x00?maxlen）;

????//?check?if?arguments?valid
????if?（!out?||?!in）?{
????????return?INVALID_ARG;
????}

????//?decode?each?four?base64?characters
????for?（;?inlen?>=?4;?inlen?-=?4?in?+=?4）?{
????????//?update?output?length?and?check?overflow
????????if?（++outlen?>=?maxlen?&&?maxlen）?{
????????????*out_org?=?‘\0‘;
????????????return?OUTPUT_OVERFLOW;
????????}

????????if?（（digit0?=?DECODE64（in[0]））?==?BAD）?{
????????????*out_org?=?‘\0‘;
????????????return?WRONG_FORMAT;
????????}
????????if?（（digit1?=?DECODE64（in[1]））?==?BAD）?{
????????????*out_org?=?‘\0‘;
????????????return?WRONG_FORMAT;
????????}
????????*out++?=?（（digit0?<>?4）?&?0x03）;

????????if?（in[2]?!=?‘=‘）?{
????????????//?update?output?length?and?check?overflow
????????????if?（++outlen?>=?maxlen?&&?maxlen）?{
????????????????*out_org?=?‘\0‘;
????????????????return?OUTPUT_OVERFLOW;
????????????}

????????????if?（（digit2?=?DECODE64（in[2]））?==?BAD）?{
????????????????*out_org?=?‘\0‘;
????????????????return?WRONG_FORMAT;
????????????}
????????????*out++?=?（（digit1?<>?2）?&?0x0F）;

????????????if?（in[3]?!=?‘=‘）?{
????????????????//?update?output?length?and?check?overflow
????????????????if?（++outlen?>=?maxlen?&&?maxlen）?{
????????????????????*out_org?=?‘\0‘;
????????????????????return?OUTPUT_OVERFLOW;
????????????????}

????????????????if?（（digit3?=?DECODE64（in[3]））?==?BAD）?{
????????????????????*out_org?=?‘\0‘;
????????????????????return?WRONG_FORMAT;
????????????????}
????????????????*out++?=?（（digit2?<????????????}?else?{
????????????????over?=?1;
????????????????break;
????????????}
????????}?else?{
????????????over?=?1;
????????????break;
????????}
????}

????//?there?cannt?have?tail-fragment?except?after?‘=‘
????if?（!over?&&?inlen?>?0）?{
????????*out_org?=?‘\0‘;
????????return?WRONG_FORMAT;
????}

????//?terminate?the?output?string
????*out?=?‘\0‘;

????return?outlen;
}

/************

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????50176??2017-08-12?19:16??EncryptFile\EncryptFile\Debug\EncryptFile.exe

?????文件?????371024??2017-08-12?19:16??EncryptFile\EncryptFile\Debug\EncryptFile.ilk

?????文件?????461824??2017-08-12?19:16??EncryptFile\EncryptFile\Debug\EncryptFile.pdb

?????文件???????5746??2017-06-28?10:26??EncryptFile\EncryptFile\EncryptFile\base64.c

?????文件???????2376??2017-06-28?10:26??EncryptFile\EncryptFile\EncryptFile\base64.h

?????文件???????8064??2017-08-11?20:15??EncryptFile\EncryptFile\EncryptFile\Debug\base64.obj

?????文件???????7964??2017-07-18?14:57??EncryptFile\EncryptFile\EncryptFile\Debug\BuildLog.htm

?????文件???????2142??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\cl.command.1.tlog

?????文件???????5542??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\CL.read.1.tlog

?????文件???????2216??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\CL.write.1.tlog

?????文件??????41022??2017-08-11?21:35??EncryptFile\EncryptFile\EncryptFile\Debug\DES.obj

?????文件???????3701??2017-08-11?20:15??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.Build.CppClean.log

?????文件????????406??2017-08-11?20:15??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.exe.embed.manifest

?????文件????????472??2017-08-11?20:15??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.exe.embed.manifest.res

?????文件????????381??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.exe.intermediate.manifest

?????文件????????119??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.lastbuildstate

?????文件???????3338??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.log

?????文件????????707??2017-08-11?21:21??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.vcxprojResolveAssemblyReference.cache

?????文件??????????0??2017-08-11?20:15??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile.write.1.tlog

?????文件????????212??2017-08-11?20:15??EncryptFile\EncryptFile\EncryptFile\Debug\EncryptFile_manifest.rc

?????文件??????????2??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\link-cvtres.read.1.tlog

?????文件??????????2??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\link-cvtres.write.1.tlog

?????文件???????2140??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\link.command.1.tlog

?????文件???????3814??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\link.read.1.tlog

?????文件???????1392??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\link.write.1.tlog

?????文件??????13772??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\main.obj

?????文件????????458??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\mt.command.1.tlog

?????文件?????????65??2017-07-18?14:57??EncryptFile\EncryptFile\EncryptFile\Debug\mt.dep

?????文件????????434??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\mt.read.1.tlog

?????文件????????434??2017-08-12?19:16??EncryptFile\EncryptFile\EncryptFile\Debug\mt.write.1.tlog

............此處省略36個文件信息