36 lines
1 KiB
Plaintext
36 lines
1 KiB
Plaintext
---
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layout: docs
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page_title: bcrypt - Functions - Configuration Language
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description: |-
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The bcrypt function computes a hash of the given string using the Blowfish
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cipher.
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---
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# `bcrypt` Function
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`bcrypt` computes a hash of the given string using the Blowfish cipher,
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returning a string in [the _Modular Crypt
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Format_](https://passlib.readthedocs.io/en/stable/modular_crypt_format.html)
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usually expected in the shadow password file on many Unix systems.
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```hcl
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bcrypt(string, cost)
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```
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The `cost` argument is optional and will default to 10 if unspecified.
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Since a bcrypt hash value includes a randomly selected salt, each call to this
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function will return a different value, even if the given string and cost are
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the same. Using this function directly with job arguments will therefore
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cause spurious job updates.
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The version prefix on the generated string (e.g. `$2a$`) may change in future
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versions of Nomad.
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## Examples
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```shell-session
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> bcrypt("hello world")
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$2a$10$D5grTTzcsqyvAeIAnY/mYOIqliCoG7eAMX0/oFcuD.iErkksEbcAa
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```
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