Xbase++ Requires Chilkat v11.0.0+

RSA Encrypt RSA/ECB/OAEPWithSHA1AndMGF1Padding

See more RSA Examples

Demonstrates how to RSA encrypt using RSA/ECB/OAEPWithSHA1AndMGF1Padding. Also demonstrates RSA/ECB/OAEPWithSHA-256AndMGF1Padding. Both of these terms are from Java's JCE. Note: In this context, "ECB" doesn't actually mean anything. It's a symmetric cipher mode that doesn't apply (or make sense) in this context. Xbase++

LOCAL nSuccess
LOCAL oRsa
LOCAL oPubkey
LOCAL cPlainText
LOCAL nUsePrivateKey
LOCAL cEncryptedStr
LOCAL oRsa2
LOCAL oPrivKey
LOCAL cOriginalStr

nSuccess := 0

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

oRsa := CreateObject("Chilkat.Rsa")

//  First load a public key object with a public key.
//  In this case, we'll load it from a file.
oPubkey := CreateObject("Chilkat.PublicKey")
nSuccess := oPubkey:LoadFromFile("qa_data/pem/rsa_public.pem")
IF (nSuccess == 0)
    ? oPubkey:LastErrorText
    oRsa:destroy()
    oPubkey:destroy()
    RETURN
ENDIF

//  RSA encryption is limited to small amounts of data. The limit
//  is typically a few hundred bytes and is based on the key size and
//  padding (OAEP vs. PKCS1_5).  RSA encryption is typically used for
//  encrypting hashes or symmetric (bulk encryption algorithm) secret keys.
cPlainText := "Time is an illusion. Lunchtime doubly so."

//  Import the public key to be used for encrypting.
nSuccess := oRsa:UsePublicKey(oPubkey)

//  To get OAEP padding, set the PkcsPadding property equal to 0
oRsa:PkcsPadding := 0
oRsa:OaepHash := "sha256"

//  Indicate we'll want hex output
oRsa:EncodingMode := "hex"

//  Encrypt..
nUsePrivateKey := 0
cEncryptedStr := oRsa:EncryptStringENC(cPlainText, nUsePrivateKey)
? cEncryptedStr

//  -------------------------------------------------
//  Now decrypt with the matching private key.
oRsa2 := CreateObject("Chilkat.Rsa")

oPrivKey := CreateObject("Chilkat.PrivateKey")
nSuccess := oPrivKey:LoadEncryptedPem("qa_data/pem/rsa_passwd.pem", "passwd")
IF (nSuccess == 0)
    ? oPrivKey:LastErrorText
    oRsa:destroy()
    oPubkey:destroy()
    oRsa2:destroy()
    oPrivKey:destroy()
    RETURN
ENDIF

nSuccess := oRsa2:UsePrivateKey(oPrivKey)

//  Make sure we have the same settings used for encryption.
oRsa2:PkcsPadding := 0
oRsa2:EncodingMode := "hex"
oRsa2:OaepHash := "sha256"

cOriginalStr := oRsa2:DecryptStringENC(cEncryptedStr, 1)

? cOriginalStr

oRsa:destroy()
oPubkey:destroy()
oRsa2:destroy()
oPrivKey:destroy()