HASH 遊び †

sha1 †

php -r 'echo sha1("engineering");'
echo -n 'engineering' |  perl -lne 'use Digest::SHA1 qw(sha1_hex);  print sha1_hex("$_")'
perl -le 'use Digest::SHA1 qw(sha1_hex); print sha1_hex("engineering");'
echo -n 'engineering' | openssl dgst -sha1
---
72917ef6c1d976fb7d5e3e52394a829d441ed3cd

md5 †

php -r 'echo md5("engineering");'
echo -n 'engineering' | perl -lne 'use Digest::MD5 qw(md5_hex); print md5_hex("$_")'
perl -le 'use Digest::MD5 qw(md5_hex); print md5_hex("engineering");'
echo -n 'engineering'| openssl dgst -md5
---
5d554bc5f3d2cd182cdd0952b1fb87ca

base64 †

$ echo engineering |base64
ZW5naW5lZXJpbmcK

$ echo ZW5naW5lZXJpbmcK  |base64 -d
engineering

$ echo http://tomocha.net/ | base64
aHR0cDovL3RvbW9jaGEubmV0Lwo=

$ echo aHR0cDovL3RvbW9jaGEubmV0Lwo= |base64 -d
http://tomocha.net/

hex †

echo -n 'engineering' | perl -lne 'print unpack("H*", $_)'
perl -le 'print unpack("H*","engineering");'
---
656e67696e656572696e67

逆

echo '656e67696e656572696e67' | perl -lne 'print pack("H*", $_)'
perl -le 'print pack("H*", "656e67696e656572696e67")'

その他

• Linux/hexへの変換方法

デコード(というよりCrack) †

• http://passcracking.com/
• http://www.cmd5.org/

• http://www.freerainbowtables.com/
• http://rainbowtables.shmoo.com/
• http://lastbit.com/md5password/default.asp
• http://www.stottmeister.com/blog/2009/04/14/how-to-crack-md5-passwords/
• http://bogus.jp/pukiwiki/index.php?%A5%D1%A5%B9%A5%AF%A5%E9%A5%C3%A5%AF

OpenSSL をつかう。 †

openssl には次のアルゴリズムが対応している。

options are
-c              to output the digest with separating colons
-d              to output debug info
-hex            output as hex dump
-binary         output in binary form
-sign   file    sign digest using private key in file
-verify file    verify a signature using public key in file
-prverify file  verify a signature using private key in file
-keyform arg    key file format (PEM or ENGINE)
-signature file signature to verify
-binary         output in binary form
-engine e       use engine e, possibly a hardware device.
-md5            to use the md5 message digest algorithm (default)
-md4            to use the md4 message digest algorithm
-md2            to use the md2 message digest algorithm
-sha1           to use the sha1 message digest algorithm
-sha            to use the sha message digest algorithm
-sha224         to use the sha224 message digest algorithm
-sha256         to use the sha256 message digest algorithm
-sha384         to use the sha384 message digest algorithm
-sha512         to use the sha512 message digest algorithm
-mdc2           to use the mdc2 message digest algorithm
-ripemd160      to use the ripemd160 message digest algorithm

使い方は簡単。

# echo -n 'engineering' | openssl dgst <algorithm>