VB.NET

RSA Encrypt and OpenSSL Decrypt

See more OpenSSL Examples

Demonstrates how to use Chilkat to RSA encrypt, and then use OpenSSL to decrypt. VB.NET

Dim success As Boolean = False

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

Dim rsa As New Chilkat.Rsa

Dim privKey As New Chilkat.PrivateKey
success = rsa.GenKey(2048,privKey)
success = privKey.SavePkcs8PemFile("qa_output/privKey.pem")

Dim pubKey As New Chilkat.PublicKey
privKey.ToPublicKey(pubKey)

rsa.EncodingMode = "base64"
Dim plainText As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890"
Dim bUsePrivateKey As Boolean = False
rsa.UsePublicKey(pubKey)
Dim encryptedStr As String = rsa.EncryptStringENC(plainText,bUsePrivateKey)

Dim bd As New Chilkat.BinData
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.WriteLine("OK")