Unable to decrypt S/MIME email encrypted using the RSAES-OAEP key transport algorithm with PGP Encryption Server (Symantec Encryption Management Server)

Products

• Encryption Management Server
• PGP Command Line
• PGP Encryption Suite
• PGP Key Management Server
• PGP Key Mgmt Client Access and CLI API
• PGP SDK
• Desktop Email Encryption
• Drive Encryption
• Endpoint Encryption
• File Share Encryption
• Gateway Email Encryption

Issue/Introduction

The PGP Encryption Server (Symantec Encryption Management Server) cannot decrypt S/MIME email encrypted using the RSAES-OAEP (RSA Encryption Scheme - Optimal Asymmetric Encryption Padding) key transport algorithm.

The mail log will contain entries like this when the PGP Encryption Server attempts to decrypt an RSAES-OAEP encrypted message:

2017/10/11 09:30:09 +01:00  INFO   pgp/messaging[3412]:      SMTP-00001: recipient [email protected]: policy rule match: chain: "Inbound", rule: "Decrypt Message (SMTP)"
2017/10/11 09:30:09 +01:00  WARN   pgp/messaging[3412]:      SMTP-00001: fatal exception evaluating policy for recipient [email protected]: unimplemented public key operation - jumping to Exception chain

Resolution

If you are using RSAES-OAEP, and finding that decryption is failing, this not currently supported.  

If you are running into this issue, reach out to Symantec Encryption Support for further guidance.

Additional Information

EPG-37432