Hello,

We have a client that generates signed files that can be validated with old versions of BC (1.48) and OpenSSL SMIME, but cannot be validated with newer versions (1.78+). There is no specific exception, just that SignerInformation verify method returns false.

Attached 3 files:

• data_doc.txt is the actual data
• data_PKCS.txt is the BASE64 encoded data
• TestBCSignature.txt is the test program.

Any suggestions on what may be wrong with the signature?

data_doc.txt
data_PKCS.txt
TestBCSignature.txt