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When attempting to create a self-signed .p12 file used to sign BAR files, if the common name (CN) contains a comma then the tool will throw the following exception:
keytool error: java.io.IOException: Incorrect AVA format
As an example: Garett, Inc
To remedy this issue and allow common names that include commas, you just need to ensure that all commas are properly escaped with a backslash:
The above comma-escaped CN will match the Package-Author field of the created MANIFEST.MF file with a value of "Garett, Inc".