(PowerBuilder) openssl enc decrypt

Demonstrates how to decrypt a file that was encrypted using "openssl enc".

This example shows how to decrypt what was created using this openssl command:

openssl enc -e -aes-256-cbc -in hamlet.xml -out hamlet.enc -pass file:./secret.txt

This example shows how to do this:

openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt

Note: This example requires Chilkat v9.5.0.71 or later.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Crypt
oleobject loo_FileData
integer li_Success

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

loo_Crypt = create oleobject
// Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Use aes-256-cbc
loo_Crypt.CryptAlgorithm = "aes"
loo_Crypt.CipherMode = "cbc"
loo_Crypt.KeyLength = 256

// We'll need to set the hash algorithm to either MD5 or SHA256.
// openssl version 1.0.* or earlier used MD5 by default
// openssl version 1.1.* uses SHA-256 for the password to secret key derivation.

// For example, if openssl 1.1.0 was used, we should do this:
loo_Crypt.HashAlgorithm = "sha256"

// This example assumes openssl 1.0.2 was used to encrypt what we're now decrypting:
loo_Crypt.HashAlgorithm = "md5"

// The openssl command we are duplicating is:
// 
//    openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt
// 
// The file secret.txt contains the word "secret".  We could write code to load the contents
// of secret.txt, but instead we'll just do this:
loo_Crypt.SetSecretKeyViaPassword("secret")

// Load the file to be decrypted.
loo_FileData = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_FileData.ConnectToNewObject("Chilkat.BinData")

li_Success = loo_FileData.LoadFile("qa_data/openssl_enc/hamlet.enc")

// Decrypt
li_Success = loo_Crypt.DecryptBd(loo_FileData)

// Save the decrypted output.
li_Success = loo_FileData.WriteFile("qa_output/hamlet_dec.xml")

Write-Debug "success = " + string(li_Success)


destroy loo_Crypt
destroy loo_FileData