Workbook on Digital Private Papers > How-Tos
How-Tos
Jacksum
Jacksum is a command-line utility for calculating and verifying checksums, hash values and timestamps; it does not support digital signatures. The software is written in Java and can run on any platform that supports the Java Runtime Environment (such as Windows, Linux, Mac, Unix). Jacksum supports many popular checksum algorithms (58 in v. 1.7.0; it uses SHA-1 by default) including strong one-way hash algorithms. Its command-line interface facilitates ease its incorporation with other scripts and tools:
jacksum paradigm.gif
10f4fdc3c99bdb3edbc8ca84a67c074d44a45c88 paradigm.gif
jacksum -E base64 paradigm.gif
EPT9w8mb2z7byMqEpnwHTUSkXIg= paradigm.gif
jacksum -a sha1 paradigm.gif
10f4fdc3c99bdb3edbc8ca84a67c074d44a45c88 paradigm.gif
jacksum -a sha1 -E base64 paradigm.gif
EPT9w8mb2z7byMqEpnwHTUSkXIg= paradigm.gif
Jacksum also supports integration with file browser/managers such as Konqueror and MS Windows Explorer:
Right click and select desired algorithm as below
which produces an output file
or it can be embedded in other applications, such as the Java GUI tool Hasher 0.3.
