class?HB64（object）:

????b64byte?=?“ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/“
????b64cpt?=?“=“

????def?hex2b64（self?string）:
????????result?=?““
????????ptr?=?0
????????b1?=?int（“111111000000000000000000“?2）
????????b2?=?int（“000000111111000000000000“?2）
????????b3?=?int（“000000000000111111000000“?2）
????????b4?=?int（“000000000000000000111111“?2）
????????lenth?=?len（string）
????????while?ptr+6?<=?lenth:
????????????temp?=?int（string[ptr:ptr+6]?16）
????????????result?+=?self.b64byte[（temp?&?b1）?>>?18]?
????????????result?+=?self.b64byte[（temp?&?b2）?>>?12]
????????????result?+=?self.b64byte[（temp?&?b3）?>>?6]
????????????result?+=?self.b64byte[temp?&?b4]
????????????ptr?+=?6
????????if?lenth-ptr?==?4:
????????????temp?=?int（string[ptr:ptr+4]?16）?<????????????result?+=?self.b64byte[（temp?&?b2）?>>?12]
????????????result?+=?self.b64byte[（temp?&?b3）?>>?6]
????????????result?+=?self.b64byte[temp?&?b4]
????????????result?+=?self.b64cpt
????????elif?lenth-ptr?==?2:
????????????temp?=?int（string[ptr:ptr+2]?16）?<????????????result?+=?self.b64byte[（temp?&?b3）?>>?6]
????????????result?+=?self.b64byte[temp?&?b4]
????????????result?+=?self.b64cpt?*?2
????????elif?lenth-ptr?==?0:
????????????pass
????????else:
????????????raise?Exception
????????return?result

????def?b642hex（self?string）:
????????result?=?““
????????ptr?=?0
????????lenth?=?len（string）
????????b1?=?int（“111111110000000000000000“?2）
????????b2?=?int（“000000001111111100000000“?2）
????????b3?=?int（“000000000000000011111111“?2）
????????while?ptr+8?<=?lenth:
????????????????temp?=?string[ptr:ptr+4]
????????????????temp_result?=?0
????????????????for?cell?in?range（4）:
????????????????????temp_result?+=?self.b64byte.index（temp[cell]）?<????????????????r1?=?hex（（temp_result?&?b1）?>>?16）[2:]
????????????????r2?=?hex（（temp_result?&?b2）?>>?8）[2:]
????????????????r3?=?hex（temp_result?&?b3）[2:]
????????????????if?len（r1）?==?1:
????????????????????r1?=?‘0‘?+?r1
????????????????if?len（r2）?==?1:
????????????????????r2?=?‘0‘?+?r2
????????????????if?len（r3）?==?1:
????????????????????r3?=?‘0‘?+?r3
????????????????result?+=?r1
????????????????result?+=?r2
????????????????result?+=?r3
????????????????ptr?+=?4
????????if?string[-1]==“=“?and?string[-2]==“=“:
????????????temp?=?string[ptr:ptr+2]
????????????temp_result?=?0
????????????temp_result?+=?self.b64byte.index（temp[0]）?<????????????temp_result?+=?self.b64byte.index（temp[1]?>>?4）?<????????????r1?=?hex（（temp_result?&?b1）?>>?16）[2:]
????????????r2?=?hex（（temp_result?&?b2）?>>?8）[2:]
????????????if?len（r1）?==?1:
????????????????r1?=?‘0‘?+?r1
????????????if?len（r2）?==?1:
????????????????r2?=?‘0‘?+?r2
????????????result?+=?r1
????????????result?+=?r2

????????elif?string[-1]==“=“:
????????????temp?=?string[ptr:ptr+3]
????????????temp_result?=?0
????????????for?cell?in?range（2）:
????????????????temp_result?+=?self.b64byte.index（temp[cell]）?<????????????temp_result?+=?self.b64byte

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

?????文件???????4095??2019-03-09?18:01??hex2b64.py

?????文件???????3641??2019-03-10?21:46??login.py

?????文件???????2942??2019-01-05?12:19??RSAJS.py

-----------?---------??----------?-----??----

????????????????10678????????????????????3