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(PowerBuilder) RSA Hash Binary Data and Sign (and Verify)Demonstrates how to sign the hash of binary data. Also demonstrates how to verify the RSA signature. Note: This example requires Chilkat v11.0.0 or greater.
integer li_rc integer li_Success oleobject loo_PrivKey oleobject loo_Rsa string ls_OriginalData oleobject loo_BdData oleobject loo_BdSignature oleobject loo_PubKey oleobject loo_Rsa2 integer li_BVerified li_Success = 0 // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Load an RSA private key for signing. loo_PrivKey = create oleobject li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey") if li_rc < 0 then destroy loo_PrivKey MessageBox("Error","Connecting to COM object failed") return end if li_Success = loo_PrivKey.LoadEncryptedPemFile("qa_data/pem/rsa_passwd.pem","passwd") if li_Success = 0 then Write-Debug loo_PrivKey.LastErrorText destroy loo_PrivKey return end if loo_Rsa = create oleobject li_rc = loo_Rsa.ConnectToNewObject("Chilkat.Rsa") loo_Rsa.UsePrivateKey(loo_PrivKey) // We have some binary data (in hex) to sign ls_OriginalData = "0102030405060708090A" loo_BdData = create oleobject li_rc = loo_BdData.ConnectToNewObject("Chilkat.BinData") loo_BdData.AppendEncoded(ls_OriginalData,"hex") // Hash (SHA-256) and sign the hash: loo_BdSignature = create oleobject li_rc = loo_BdSignature.ConnectToNewObject("Chilkat.BinData") li_Success = loo_Rsa.SignBd(loo_BdData,"sha256",loo_BdSignature) if li_Success = 0 then Write-Debug loo_Rsa.LastErrorText destroy loo_PrivKey destroy loo_Rsa destroy loo_BdData destroy loo_BdSignature return end if // Show the RSA signature in base64 Write-Debug loo_BdSignature.GetEncoded("base64") // ------------------------------------------ // Get the public key from the private key loo_PubKey = create oleobject li_rc = loo_PubKey.ConnectToNewObject("Chilkat.PublicKey") loo_PrivKey.ToPublicKey(loo_PubKey) // Verify the signature.. loo_Rsa2 = create oleobject li_rc = loo_Rsa2.ConnectToNewObject("Chilkat.Rsa") loo_Rsa2.UsePublicKey(loo_PubKey) li_BVerified = loo_Rsa2.VerifyBd(loo_BdData,"sha256",loo_BdSignature) Write-Debug "signature verified: " + string(li_BVerified) destroy loo_PrivKey destroy loo_Rsa destroy loo_BdData destroy loo_BdSignature destroy loo_PubKey destroy loo_Rsa2 |
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