nix3-hash-convert(1)

    Warning
    This program is experimental (@docroot@/development/experimental-features.md#xp-feature-nix-command) and its interface is subject to change.

Name

nix hash convert - convert between hash formats

Synopsis

nix hash convert [option…] hashes…

Examples

•   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

•   Convert a hash to the sri format (https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity) 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=

•   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=

Description

nix hash convert converts hashes from one encoding to another.

Options

•   --from (#opt-from) hash-format

    Hash format (base16, nix32, base64, sri).

•   --hash-algo (#opt-hash-algo) hash-algo

    Hash algorithm (md5, sha1, sha256, or sha512). Can be omitted for SRI hashes.

•   --to (#opt-to) hash-format

    Hash format (base16, nix32, base64, sri). Default: sri.

  Logging-related options

•   --debug (#opt-debug)

    Set the logging verbosity level to ‘debug’.

•   --log-format (#opt-log-format) format

    Set the format of log output; one of raw, internal-json, bar or bar-with-logs.

•   --print-build-logs (#opt-print-build-logs) / -L

    Print full build logs on standard error.

•   --quiet (#opt-quiet)

    Decrease the logging verbosity level.

•   --verbose (#opt-verbose) / -v

    Increase the logging verbosity level.

  Miscellaneous global options

•   --help (#opt-help)

    Show usage information.

•   --offline (#opt-offline)

    Disable substituters and consider all previously downloaded files up-to-date.

•   --option (#opt-option) name value

    Set the Nix configuration setting name to value (overriding nix.conf).

•   --refresh (#opt-refresh)

    Consider all previously downloaded files out-of-date.

•   --version (#opt-version)

    Show version information.

    Note

    See man nix.conf (@docroot@/command-ref/conf-file.md#command-line-flags) for overriding configuration settings with command line flags.