(Go) Duplicate openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

Demonstrates how to encrypt to binary DER using 256-bit AES (CBC mode) as the underlying symmetric encryption algorithm, to produce PKCS7 enveloped data (binary DER).

Duplicates the following openssl command:

openssl smime -encrypt -binary -aes-256-cbc -in some_file.dat -out some_file.dat.enc -outform DER cert.crt

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    cert := chilkat.NewCert()
    success := cert.LoadFromFile("qa_data/openssl/EE.cer")
    if success == false {
        fmt.Println(cert.LastErrorText())
        cert.DisposeCert()
        return
    }

    bd := chilkat.NewBinData()
    success = bd.LoadFile("qa_data/openssl/hello.txt")
    // Assuming success..

    crypt := chilkat.NewCrypt2()
    success = crypt.SetEncryptCert(cert)
    if success == false {
        fmt.Println(crypt.LastErrorText())
        cert.DisposeCert()
        bd.DisposeBinData()
        crypt.DisposeCrypt2()
        return
    }

    crypt.SetCryptAlgorithm("PKI")

    // Indicate the underlying symmetric encryption to be used:
    crypt.SetPkcs7CryptAlg("aes")
    crypt.SetKeyLength(256)
    crypt.SetCipherMode("cbc")

    success = crypt.CkEncryptFile("qa_data/openssl/hello.txt","qa_output/hello.txt.enc")
    if success == false {
        fmt.Println(crypt.LastErrorText())
        cert.DisposeCert()
        bd.DisposeBinData()
        crypt.DisposeCrypt2()
        return
    }

    fmt.Println("Success.")

    cert.DisposeCert()
    bd.DisposeBinData()
    crypt.DisposeCrypt2()