HCC Crypto

Co-Sign File

This tool adds a second signature to a code file that has already been signed using a PKCS #7: Cryptographic Message Syntax (CMS) digital signature using a detached/external signed-data structure (see here). The co-signing certificate is included in the signature. The issuing CA certificate of the co-signing certificate may be included in the signature. The second signature is added to the existing signed-data structure which is appended to the beginning of the code file.

Warning: private keys uploaded to this tool should ONLY be used for test and development purposes.

The date and time should be entered in Greenwitch Mean Time (GMT). If needed, an example of a GMT converter can be found here.

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