nix3-hash-convert(1) General Commands Manual nix3-hash-convert(1)

Warning
This program is experimental and its interface is subject to change.

nix hash convert - convert between hash formats

nix hash convert [option…] hashes…

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Convert a hash to nix32 (a base-32 encoding with a Nix-specific character set).
$ nix hash convert --hash-algo sha1 --to nix32 800d59cfcd3c05e900cb4e214be48f6b886a08df
vw46m23bizj4n8afrc0fj19wrp7mj3c0
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Convert a hash to the sri format that includes an algorithm specification:
# nix hash convert --hash-algo sha1 800d59cfcd3c05e900cb4e214be48f6b886a08df
sha1-gA1Zz808BekAy04hS+SPa4hqCN8=
or with an explicit --to format:
# nix hash convert --hash-algo sha1 --to sri 800d59cfcd3c05e900cb4e214be48f6b886a08df
sha1-gA1Zz808BekAy04hS+SPa4hqCN8=
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Assert the input format of the hash:
# nix hash convert --hash-algo sha256 --from nix32 ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=
error: input hash 'ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=' does not have the expected format '--from nix32'
# nix hash convert --hash-algo sha256 --from nix32 1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s
sha256-ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=

nix hash convert converts hashes from one encoding to another.

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--from hash-format
Hash format (base16, nix32, base64, sri).
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--hash-algo hash-algo
Hash algorithm (md5, sha1, sha256, or sha512). Can be omitted for SRI hashes.
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--to hash-format
Hash format (base16, nix32, base64, sri). Default: sri.
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--debug
Set the logging verbosity level to ‘debug’.
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--log-format format
Set the format of log output; one of raw, internal-json, bar or bar-with-logs.
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--print-build-logs / -L
Print full build logs on standard error.
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--quiet
Decrease the logging verbosity level.
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--verbose / -v
Increase the logging verbosity level.

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--help
Show usage information.
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--offline
Disable substituters and consider all previously downloaded files up-to-date.
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--option name value
Set the Nix configuration setting name to value (overriding nix.conf).
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--refresh
Consider all previously downloaded files out-of-date.
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--version
Show version information.

Note

See man nix.conf for overriding configuration settings with command line flags.