nested sha1

[philsmd]

For instance the "Redmine Project Management Web App" uses exactly this algorithm, i.e.
sha1 ($salt . sha1 ($pass))

the algorithm is available on both hashcat and oclHashcat with attack mode -m 7600.
The format, as you can see here https://hashcat.net/wiki/doku.php?id=example_hashes , is

Code:

hash:salt