Algorithms

Algorithm Configuration

The following start options are used to configure the security algorithms:

• Signature:
  • Hashfunction (Hash algorithm): SHA-256 or SHA-512
  • Signature procedure (Signature algorithm): RSASSA-PSS
• Encryption:
  • Key encryption: RSAES-OAEP (with hash function SHA-256)
  • Content encryption: AES-128 CBC oder AES-192 CBC

Use these JAVA_OPTS:

• -Dsigning_algorithm (Default: Hash algorithm from certificate due to [RFC-4056](https://www.rfc-editor.org/rfc/rfc4056) if valid for market-communication, otherwise SHA256withRSAandMGF1)
• -Dkey_encryption_algorithm (Default: id_RSAES_OAEP)
• -Dcontent_encryption_algorithm (Default: AES128_CBC)

Specific algorithms for specific recipients

You can configure different algorithms for different recipients. Recipients are distinguished by their certificate-alias (usually ILN/Mail).

Instead of defining a single algorithm, use the following syntax:

content_encryption_algorithm=Algo1:[alias1,alias2];Algo2:alias3;Algo3

In this example for recipients alias1/alias2 the algorithm Algo1 is used. For recipient with alias2 the algorithm Algo2 is used. For all other recipients Algo3 is used.

Specification:

The property value (right side of equal sign) is a list of algorithm-alias assignments, separated by ;.

An assignment is a pair of algorithm and aliases, divided by :. The aliases are optional. An algorithm without aliases is used as fallback value. If no fallback is specified, the default values are used as fallback.

The aliases are a list of at least one alias, separated by ,. The list can be enclosed by [ ].

This syntax works for content_encryption_algorithm, key_encryption_algorithm, signing_algorithm.

Don’t be confused when configuring the signing algorithm: You configure the algorithm to be be used for signing of outbound messages, thus the signature by your system/sender. However the configuration is based on the partner/recipient.