Date: Mon, 11 Jan 2016 14:35:54 +0100 From: patpro@...pro.net To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com> Subject: format-all-details -> Max. password length in bytes Hello, Another noobish question I'm afraid. Unfortunately, when it comes to JtR I seem unable to find any proper answer with search engines… I'm running John (jumbo) against some Salted-SHA1, and reading the log file, I've seen: > Will reject candidates longer than 39 bytes I was a bit surprised, so I've checked details for this hash format: > ./john --list=format-all-details --format=Salted-SHA1 > Format label Salted-SHA1 > Disabled in configuration file no > Min. password length in bytes 0 > Max. password length in bytes 39 > ../.. I wonder how those limits are set: how are they implemented, are they tunable at run time, and why 39 (arbitrary decision?) ? However, I do remember that incremental is limited to 8 char. at compile time. But I'm interested in the limit set for formats. > $ ./john --list=format-all-details | grep "Max. password length" > Max. password length in bytes 8 > Max. password length in bytes 64 > Max. password length in bytes 15 > Max. password length in bytes 72 > Max. password length in bytes 125 > Max. password length in bytes 7 > ../.. thanks, pat
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