(Visual Basic 6.0) RSA Encrypt and OpenSSL Decrypt
Demonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt.
' This requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
Dim rsa As New ChilkatRsa
Dim success As Long
success = rsa.GenerateKey(2048)
Dim privKey As PrivateKey
Set privKey = rsa.ExportPrivateKeyObj()
success = privKey.SavePkcs8PemFile("qa_output/privKey.pem")
rsa.EncodingMode = "base64"
Dim plainText As String
plainText = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890"
Dim bUsePrivateKey As Long
bUsePrivateKey = 0
Dim encryptedStr As String
encryptedStr = rsa.EncryptStringENC(plainText,bUsePrivateKey)
Dim bd As New ChilkatBinData
success = bd.AppendEncoded(encryptedStr,"base64")
success = bd.WriteFile("qa_output/enc.dat")
' The OpenSSL command to decrypt is:
' openssl pkeyutl -in enc.dat -inkey privKey.pem -keyform PEM -pkeyopt rsa_padding_mode:pkcs1 -decrypt
Debug.Print "OK"
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