- [ ] https://github.com/openwall/john/blob/bleeding-jumbo/src/pbkdf2-hmac-sha1_fmt_plug.c - [ ] https://github.com/openwall/john/blob/d718689c853936b38821195fcdd6cfec3045eb1b/src/pbkdf2_hmac_common_plug.c#L339 - [ ] https://github.com/hashcat/hashcat/blob/master/src/modules/module_20400.c