Shell BASH---SHA256文件提取时发生哈希冲突- 猿界

来自 : yuanjie.huati365.com/ask/YLxo7 发布时间：2021-03-25

I use sha256 hash value to encrypt a password( no matter digit form or char form ).when I unzip the password-protected file, I can use at least two different hash to unzip my file -- it occurs a Hash collision. Although there is no searching point out this situation, I know md5 and sha-1 have hash collision. so what is the problem?

Case1: I use 5566 sha256 hash zip my file

zip -P be41b7f1fa56ba2b0582910053c86cf6ee7e311efc51300220df0918bb9a287b abc.zip abc

Reference Sha256(0138) = 687d579d0992a7895190ad126ba8051704753bdc85d52481a83da4670e2321d7

Reference Sha256(5566) = be41b7f1fa56ba2b0582910053c86cf6ee7e311efc51300220df0918bb9a287b

However, apart from 5566 hash value, I also can use 0138 hash value to unzip this file. The following code both success in file extraction.

 unzip -P 687d579d0992a7895190ad126ba8051704753bdc85d52481a83da4670e2321d7 abc.zip unzip -P be41b7f1fa56ba2b0582910053c86cf6ee7e311efc51300220df0918bb9a287b abc.zip

Case2: I can use \'daniel\' sha256 hash and \'pivate\' sha256 hash to unzip a file.

Thank you for your attention. Hope someone can solve my problems.I am doing a password brute-forcing assignment, and I cannot get the correct cracked password because of the above problem.

687d579d0992a7895190ad126ba8051704753bdc85d52481a83da4670e2321d7 abc.zip unzip -P be41b7f1fa56ba2b0582910053c86cf6ee7e311efc51300220df0918bb9a287b ...Shell BASH---SHA256文件提取时发生哈希冲突- 猿界I use sha256 hash value to encrypt a password( no matter digit form or char form ). when I unzip the password-protected file, I can use at least two different hash to unzip my file -- it occurs a Hash collision. Although there is no searching point out this situation, I know md5 and sha-1 have hashShell BASH