meta4ra -- Metalink4 utilities
-meta4-create utility is used to create Metalink4
+meta4ra-create utility is used to create Metalink4
(https://datatracker.ietf.org/doc/html/rfc5854)
.meta4-file for single specified file.
--fn NAME -- the only required option specifying file's name.
--desc "..." -- set file's description.
--mtime FILE -- let published date be equal to FILE's mtime.
--sig FILE -- path to armored OpenPGP's signature file.
--torrent URL -- set BitTorrent's URL.
--hashes -- comma-separated list of colon-separated pairs of hash'es
- name and the external command used to compute it. Command
- shall take the data from stdin and print the digest in
- hexadecimal form with the following newline to stdout.
+meta4ra-check utility is used to check .meta4 file, extract signatures
+and verify corresponding files integrity.
-Following hashes are predefined by default:
+meta4ra-hash utility can be used to hash the data with a single hash
+algorithm. It could be useful if you want to use the best found
+algorithm on current system, whatever it is.
-* sha-256:sha256 -- standardized name; standard command in many OSes
- May be fast on hardware accelerated CPUs.
-* sha-512:sha512 -- standardized name; standard command in many OSes
- Faster on 64-bit CPUs than software sha-256.
-* skein-256:skein256 -- non-standardized name; out-of-box command in FreeBSD
- Faster than software sha-*/shake*.
-* skein-512:skein512 -- non-standardized name; out-of-box command in FreeBSD
- Faster on 64-bit CPUs than skein-256.
-* shake128:goshake128 -- standardized name; non-standard command
- Faster than software sha-*. Much faster on hardware.
-* shake256:goshake256 -- standardized name; non-standard command
- Same speed as sha-512 on 64-bit CPUs.
- Much faster on hardware.
-* streebog-256:streebog256sum -- non-standardized name; command is in contrib/
-* streebog-512:streebog512sum -- non-standardized name; command is in contrib/
-* blake3-256:b3sum -- non-standardized name; additional package in most OSes
- Fastest parallelizeable software hash
+meta4ra is copylefted free software: see the file COPYING for copying
+conditions. It should work on all POSIX-compatible systems.
-SHA2 and SHA3 (SHAKE*) are USA's NIST standards. Streebog is Russian
-Federation's government standard. Skein is SHA3-finalist. BLAKE3 is
-reduced round Merklee-tree-based BLAKE2 descendant. BLAKE2 is reduced
-round BLAKE, that also was one of SHA3-finalists.
-
-meta4-check utility is used to check files against provided Metalink4.
-
--extract-sig -- store the OpenPGP signature (if exists) in .asc file nearby.
--hashes -- same as in meta4-create. Hashes are sorted by preferences
- priority. First matching one will be used to check integrity.
+You can select desired fields by ordinary XML-related utulities:
+ xml sel -t -m "/_:metalink/_:file/_:url" -v . -nl data.meta4