As explained in Installing the Signing Automation Client, the out-of-the-box distribution includes the pkcs11-logger third-party library for debugging purposes. In debugging mode, this library logs PKCS #11 operations by sitting between the Signing Application Client and the P11SigningClient64 library.

1. The Signing Application Client sends the PKCS #11 operation calls to the pkcs11-logger library.
2. The pkcs11-logger library redirects the calls to the P11SigningClient64 library.
3. The pkcs11-logger library returns the call results to the Signing Application Client.

To enable the debugging mode of the Signing Automation Client

1. Set the following environment variables.
   • PKCS11_LOGGER_LIBRARY_PATH
   • PKCS11_LOGGER_LOG_FILE_PATH
   • PKCS11_LOGGER_FLAGS

2. Run the signingclient config set command with the pkcs11-logger library path as the --library option value. For example: 

   signingclient config set --library "C:\Program Files\Entrust\SigningClient\pkcs11-logger64.dll"

PKCS11_LOGGER_LIBRARY_PATH 

The path of the P11SigningClient64.dll library. As explained in Installing the Signing Automation Client, the default path of this library is the following.

PKCS11_LOGGER_LOG_FILE_PATH

Set the value of this environment variable to the path of the file where logs will be recorded.

PKCS11_LOGGER_FLAGS 

The sum of requested logging flags.

For example, a value of 6 disables logging:

• The process identifier.
• The thread identifier.