What is tiger192,4 in PHP?
A quick look into the PHP code showed that PHP only understands the Tiger hash (the first one with incorrect bit padding).

It also showed that their implementation of Tiger may contain "additional passes", where each pass consists of 8 rounds (only called for values higher than 3). The value of passes is displayed behind the hash function:

#define compress(passes) \
    save_abc \
    pass(a,b,c,5) \
    key_schedule \
    pass(c,a,b,7) \
    key_schedule \
    pass(b,c,a,9) \
    for(pass_no=0; pass_no&lt;passes; pass_no++) { \ &lt;- additional rounds start here
        key_schedule \
        pass(a,b,c,9) \
        tmpa=a; a=c; c=b; b=tmpa; \
    } \
    feedforward


There seems to be no documentation other than this. Don't use cryptographic primitives that lack any description.



I've generated the same C1... hash by adding the 8 additional rounds in a Java application (and then deleted said Java implementation).