Configuration
To enable validation of certificates from an internal location (folder) on the server, the web service must be configured. The steps:
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Locate the <appSettings>element in the web service configuration fileInstallDir\WebService\Web.configand add there a new key SecusignConfigPath with a path to the secusign.properties configuration file:- 
<add key="SecusignConfigPath" value="C:\Program Files\Software602\SecuSign SDK\AdES\secusign.properties" />
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You can select any path where the web service has reading permissions. 
 
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In the secusign.propertiesconfiguration file must be set:- 
A path to the folder with certificates forming the certification path for certificate validation. Example - 
Local folder on the server: 
 CERTIFICATE_READER_DIRECTORY = c:\\SecuSign\\Certificates
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SMB drive: 
 CERTIFICATE_READER_DIRECTORY = \\\\IP_ADRESS\\SecuSign\\Certificates\\
 
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Certificate verification on the service’s backend server and then from the local folder: 
 CERTIFICATE_VALIDATION_TYPE = certvalidator-first-truststore-second
 
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The service expects the CERTIFICATE_READER_DIRECTORY location to contain the individual certificates placed in their respective subfolders. - 
The subfolder name must match the name of the certificate for which it was issued. 
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The certificate name can be found in certificate properties, where it is specified in the Subject item as "CN = <value>", for example: 
 
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An example of Certificates folder structure:
 
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