[19463] 2019-03-14_BASE64编码原理分析脚本实现及逆向案例

文档创建者:s7ckTeam
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最后更新:2025-01-18
2019-03-14_BASE64编码原理分析脚本实现及逆向案例 B A S E 6 4 i   2 0 1 9 - 0 3 - 1 4 B a s e 6 4 便 B a s e 6 4 B a s e 6 4 0 1 b a s e 6 4 b a s e 6 4 6 4 0 2 B a s e 6 4 6 4 2 ^ 6 = 6 4 6 b i t 1 8 b i t A S C I I 1 0 0 0 0 0 0 1 1 0 6 G B a s e 6 4
a b c 1 1 0 0 0 0 1 1 1 0 0 0 1 0 1 1 0 0 0 1 1   6 0 0 3 8 4 6 b a s e 6 4 3 8 4 6 4 4 =   e x a m p l e 0 1 1 0 0 1 0 1   0 1 1 1 1 0 0 0   0 1 1 0 0 0 0 1   0 1 1 0 1 1 0 1   0 1 1 1 0 0 0 0   0 1 1 0 1 1 0 0   0 1 1 0 0 1 0 1 e x a m p l e 7 使 4 0 1 1 0 0 1 0 1   0 1 1 1 1 0 0 0   0 1 1 0 0 0 0 1   0 1 1 0 1 1 0 1   0 1 1 1 0 0 0 0   0 1 1 0 1 1 0 0   0 1 1 0 0 1 0 1   0 0 0 0 0 0 0 0   0 0 0 0 0 0 0 0 6 1 0 1 1 0 0 1   0 1 0 1 1 1   1 0 0 0 0 1   1 0 0 0 0 1   0 1 1 0 1 1   0 1 0 1 1 1   0 0 0 0 0 1   1 0 1 1 0 0   0 1 1 0 0 1   0 1 0 0 0 0   0 0 0 0 0 0   0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1   0 0 0 1 0 1 1 1   0 0 1 0 0 0 0 1   0 0 1 0 0 0 0 1   0 0 0 1 1 0 1 1   0 0 0 1 0 1 1 1   0 0 0 0 0 0 0 1   0 0 1 0 1 1 0 0   0 0 0 1 1 0 0 1   0 0 0 1 0 0 0 0   0 0 0 0 0 0 0 0   0 0 0 0 0 0 0 0 2 5   2 3   3 3   3 3   2 7   2 3   1   4 4   2 5   1 6   0   0 Z X h h b X B s Z Q A A A A = = Z X h h b X B s Z Q = = p y t h o n
0 3 P y t h o n
A S C I I U T F - 8   U T F - 1 6   u n i c o d e 0 4 B u g k u f l a g I D A s t r i n g s
r i g h t   f l a g
F 5
D e s t S t r 2 r i g h t   f l a g S t r 2 S t r 2 f l a g
D e s t
便 i n p u t l e n g t h
v 9 3 v 9 * 4   v 1 0 D s t B a s e 6 4 v 1 1 l e n g t h t h r e e C h a r t h r e e C h a r i c a s e c a s e   3 i = 3 t h r e e C h a r
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