2634741 - PI Messages Fail with 'Exception decrypting key' Error but unable to deploy the unlimited strength policy files

You are processing encrypted files using SFTP channel. You see that the messages are failing with the exception below:

No Information Available for Audit Key : PGP Encryption Module: Could not extract private key (org.bouncycastle.openpgp.PGPException: Exception decrypting key)
Catching com.sap.aii.af.lib.mp.module.ModuleException: Could not open private key
Caused by: org.bouncycastle.openpgp.PGPException: Exception decrypting key
Caused by: java.security.InvalidKeyException: Illegal key size

If you go to http://<host>:<port>/BC//VerifyJCE in order to check the JCE Policy, you will see the following configuration:

Only the strong but limited policy files have been deployed

8 bit ok
16 bit ok
32 bit ok
64 bit ok
128 bit ok
256 bit null
512 bit null
1024 bit null
2048 bit null
4096 bit null

But even after you have performed steps in note 1240081 - Java Cryptography Extension (JCE) Jurisdiction Policy Files, the issue still persists. You are unable to deploy the unlimited strength policy files. When you check the 'crypto.policy' security property in the java.security file, you find it's set to "limited".

• PI Release Independent
• SAP NetWeaver
• SAP Process Integration
• SAP Process Integration, business-to-business add-on
• SAP Process Integration, secure connectivity add-on

B2B modules, PIB2BPGP, Java Cryptography Extension, JCE, strong but limited, unlimited, policy files, Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.40, PI 7.40, PO 7.40, Process Orchestration 7.50, PI 7.50, PO 7.50, NetWeaver, XI , KBA , BC-XI-CON-SFT , Secure File Transfer Protocol Adapter , BC-JAS-SEC , Security, User Management , Problem