nix3-hash-convert(1)

Usage

nix hash convert [option…] hashes…

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

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=

Overview

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.