Go

Manually Duplicate SetSecretKeyViaPassword

Demonstrates how to duplicate the password string to binary secret key computation of SetSecretKeyViaPassword.

This is a cryptographically weak way of generating a secret key from a password. The SetSecretKeyViaPassword method is deprecated and should not be used.

Go

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

    crypt := chilkat.NewCrypt2()

    // The password string is transformed to a binary secret key by computing the 
    // MD5 digest (of the utf-8 password) to obtain 16 bytes.  
    // If the KeyLength is greater than 16 bytes, then the MD5 digest of the Base64 encoding 
    // of the utf-8 password is added.  A max of 32 bytes of key material is generated, and 
    // this is truncated to the actual KeyLength required.

    crypt.SetCryptAlgorithm("aes")
    crypt.SetKeyLength(256)

    password := "this is my password"
    crypt.SetSecretKeyViaPassword(password)

    // Examine the resulting SecretKey in hex:
    fmt.Println("Computed Secret Key = ", *crypt.GetEncodedKey("hex"))

    // Now perform the same computation manually:
    sb := chilkat.NewStringBuilder()

    crypt.SetHashAlgorithm("md5")
    crypt.SetCharset("utf-8")
    crypt.SetEncodingMode("hex")
    sb.Append(*crypt.HashStringENC(password))

    passwordBase64 := crypt.EncodeString(password,"utf-8","base64")
    sb.Append(*crypt.HashStringENC(*passwordBase64))

    fmt.Println("Manually Computed = ", *sb.GetAsString())

    // The output is:
    // Computed Secret Key = 210D53992DFF432EC1B1A9698AF9DA16C7E90518F90E24828F78EC9E0A413B36
    // Manually Computed = 210D53992DFF432EC1B1A9698AF9DA16C7E90518F90E24828F78EC9E0A413B36

    crypt.DisposeCrypt2()
    sb.DisposeStringBuilder()