Base64编码-解码问题
Base64 encode - decode issue
我读到 Base64 是确定性算法，并产生独特的结果。考虑这两个编码的 base64 值：
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
&
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
这些都给我相同的解码输出。这怎么可能？我找不到这两个值的解码格式之间的任何明显差异。
是否与UTF 8、ASCII等编解码方案有关？
解码后的字符串不同——它们在行尾有不同的 CR/LF 序列：\n\n (0a0a) vs \r\n\r\n (0d0a0d0a):
00000060 20 54 65 78 74 20 43 6f 6e 74 65 6e 74 3a 20 0a | Text Content: .|
00000070 0a 20 20 20 20 44 61 74 61 3a 20 3c 69 6e 70 75 |. Data: <inpu|
00000060 20 54 65 78 74 20 43 6f 6e 74 65 6e 74 3a 20 0d | Text Content: .|
00000070 0a 0d 0a 20 20 20 20 44 61 74 61 3a 20 3c 69 6e |... Data: <in|
提示：使用hexdump -C <file>得到这样的输出。
我读到 Base64 是确定性算法，并产生独特的结果。考虑这两个编码的 base64 值：
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
&
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
这些都给我相同的解码输出。这怎么可能？我找不到这两个值的解码格式之间的任何明显差异。
是否与UTF 8、ASCII等编解码方案有关？
解码后的字符串不同——它们在行尾有不同的 CR/LF 序列：\n\n (0a0a) vs \r\n\r\n (0d0a0d0a):
00000060 20 54 65 78 74 20 43 6f 6e 74 65 6e 74 3a 20 0a | Text Content: .|
00000070 0a 20 20 20 20 44 61 74 61 3a 20 3c 69 6e 70 75 |. Data: <inpu|
00000060 20 54 65 78 74 20 43 6f 6e 74 65 6e 74 3a 20 0d | Text Content: .|
00000070 0a 0d 0a 20 20 20 20 44 61 74 61 3a 20 3c 69 6e |... Data: <in|
提示：使用hexdump -C <file>得到这样的输出。