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SecretManagement.KeyChain

macOS KeyChain vault extension for SecretManagement module

Cmdlets

These cmdlets are exported by this module for use by the user:

Get-KeyChainConfiguration

Returns the current configuration for the specific KeyChain used by this module:

PS> Get-KeyChainConfiguration

Name                      PasswordTimeout
----                      ---------------
SecretManagement.KeyChain 300

Set-KeyChainConfiguration

Set the timeout for the password. Default is 300 seconds. Set to 0 for no-timeout for when the system prompts for the password.

Unlock-KeyChain

Allows programmatic ability to unlock KeyChain if there is a timeout set for automation. Password needs to be provided via -Password parameter otherwise you will be prompted at the console.

Module Design

This module wraps the security command line tool in macOS and leverages specifically the generic-password capability stored in a KeyChain called SecretManagement.KeyChain. Because generic-password only accepts a text password, all secret types string, SecureString, hashtable, PSCredential, and byte array are converted to strings and base64 encoded to avoid any escaping problems as the string content is passed directly to the security command line tool as an argument value.

SecureStrings are converted to plaintext when stored in KeyChain. PSCredential is converted to JSON where the password is converted to plaintext. Hashtables are recursively converted to strings and then converted to JSON. However, PSCredential members contain an additional __type member with value "PSCredential" so that they can be converted back to an actual PSCredential object when retrieving the hashtable. Byte arrays are converted to a hex string and converted back to a byte array on retrieval.