B4X

Duplicate openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

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Demonstrates how to encrypt to binary DER using 256-bit AES (CBC mode) as the underlying symmetric encryption algorithm, to produce PKCS7 enveloped data (binary DER).

Duplicates the following openssl command:

openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

B4X

Dim success As Boolean = False

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim cert As ChilkatCert
cert.Initialize("cert")
success = cert.LoadFromFile("qa_data/openssl/EE.cer")
If success = False Then
    Log(cert.LastErrorText)
    Return
End If


Dim bd As ChilkatBinData
bd.Initialize
success = bd.LoadFile("qa_data/openssl/hello.txt")
'  Assuming success..

Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")
success = crypt.SetEncryptCert(cert)
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


crypt.CryptAlgorithm = "PKI"

'  Indicate the underlying symmetric encryption to be used:
crypt.Pkcs7CryptAlg = "aes"
crypt.KeyLength = 256
crypt.CipherMode = "cbc"

success = crypt.CkEncryptFile("qa_data/openssl/hello.txt", "qa_output/hello.txt.enc")
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


Log("Success.")