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I have 41 webform password items stored in Keychain. Each item has the same password (since each of them is a different wifi router in our building).

Every few months, I need to update all of these items to reflect the new password set up our sys admin. Is there a quick terminal script that I can use to batch update the password of any item whose name contains "10.18.124." from "oldpw" to "newpw"?

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This should be possible with security(1).

The command should like something like this:

security add-generic-password -a 10.18.124.1 -w "newpw" -j "Password Updated 2017-05-17 12:04" -U
  • -a Specify account name (required)
  • -w Specify password to be added
  • -j Specify comment string (optional)
  • -U Update item if it already exists

I don't think there is a "contains" feature so you maybe have to loop this.

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