Simon Willison’s Weblog

Blogmarks tagged django, djangosnippets, sha1, cryptography in 2008

Filters: Type: blogmark × Year: 2008 × django × djangosnippets × sha1 × cryptography ×

Django snippets: Sign a string using SHA1, then shrink it using url-safe base65. I needed a way to create tamper-proof URLs and cookies by signing them, but didn’t want the overhead of a full 40 character SHA1 hash. After some experimentation, it turns out you can knock a 40 char hash down to 27 characters by encoding it using a custom base65 encoding which only uses URL-safe characters. # 27th August 2008, 10:18 pm