cos / third_party / overlays / chromiumos-overlay / 0e915bd2c46760e8b2d48fe4a5b4448cbcfddb47 / . / dev-haskell / tf-random / metadata.xml

<?xml version="1.0" encoding="UTF-8"?> | |

<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd"> | |

<pkgmetadata> | |

<maintainer type="project"> | |

<email>haskell@gentoo.org</email> | |

<name>Gentoo Haskell</name> | |

</maintainer> | |

<longdescription> | |

This package contains an implementation of a high-quality splittable pseudorandom number generator. The generator is based on a cryptographic hash function built on top of the ThreeFish block cipher. See the paper /Splittable Pseudorandom Number Generators Using Cryptographic Hashing/ by Claessen, PaBka for details and the rationale of the design. | |

The package provides the following: | |

* A splittable PRNG that implements the standard 'System.Random.RandomGen' class. | |

* The generator also implements an alternative version of the 'System.Random.TF.Gen.RandomGen' class (exported from "System.Random.TF.Gen"), which requires the generator to return pseudorandom integers from the full 32-bit range, and contains an n-way split function. | |

* An alternative version of the @Random@ class is provided, which is linked to the new @RandomGen@ class, together with @Random@ instances for some integral types. | |

* Two functions for initialising the generator with a non-deterministic seed: one using the system time, and one using the @\/dev\/urandom@ UNIX special file. | |

The package uses an adapted version of the reference C implementation of ThreeFish from the reference package of the Skein hash function (<https://www.schneier.com/skein.html>), originally written by Doug Whiting. | |

Please note that even though the generator provides very high-quality pseudorandom numbers, it has not been designed with cryptographic applications in mind. | |

</longdescription> | |

</pkgmetadata> |