Decrypted message sample

In this case, it is needed to check the signature verification result available as MessagePartHandler. DecoderSignIsCorrectly property , and then process the signed part available with a call to MainPart. GetPart 0 in the same way as unsigned messages of such structure are processed. This signature format consists of a single part. The signed data is enveloped inside that part. To get an idea if a message is signed with this type of signature, call the MessagePartHandler.

DecoderIsSignedOnly method it has to return false. After calling these methods it is needed to call the MessagePartHandler. Decode method. This method decodes the enveloped data and makes it available as a value of MessagePartHandler. DecodedPart property. Once the data is decoded, it is necessary to check the signature verification result available as MessagePartHandler.

DecoderSignIsCorrectly property and then process the enveloped part in the same way as unsigned messages of such structure are processed. Encrypted-only messages consist of a single part just as a signed message with "enveloped format" signature.

Call the MessagePartHandler. DecoderIsCrypted method to determine if the message is encrypted. After this you need to provide a decryption certificate. This is done by assigning a certificate storage with a certificate suitable for decryption this should be one or more certificates with associated private key s , issued to one or more recipients of the message to MessagePartHandler.

CertificatesStorage property. The public key is the function of both e and n i. The private key is the function of both d and n i.

Search for: Search. Skip to content. The example then decrypts the message using the receiver's private key and verifies the signature using the sender's public key.

The sender's certificate containing the needed public key is included in the encrypted message. This example also writes the signed and encrypted message to a file. To sign the message, the signer's private key and the signer's certificate must be available. To encrypt the signed message, a receiver's certificate including the receiver's public key must be available. To decrypt the message, the receiver's private key must be available.

After the message is decrypted, the signature is verified using the public key from the certificate included in the encrypted message. Not all of the certificates in a certificate store provide access to the private key associated with that certificate.