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A5_Encrypt_String and OpenSSL

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  • mvaughn
    replied
    Re: A5_Encrypt_String and OpenSSL

    OpenPGP.js-Examples
    I just opened a GitHub project that I've been meaning to do for a while.
    For anyone interested in PGP encryption/decryption this will be a helpful place to start.

    Leave a comment:


  • aschone
    replied
    Re: A5_Encrypt_String and OpenSSL

    Thank you, I will take a look at the examples you posted. I sent a PM to Alpha and the response I received indicated that Alpha5 is a one off implementation of blowfish encryption and cross platform compatibility is not intended. Unfortunately this means I will need to forgo using Alpha5's built in functions.

    Leave a comment:


  • mvaughn
    replied
    Re: A5_Encrypt_String and OpenSSL

    Andrew, i think this might be what you are looking for, it is what I use for my PGP implementations.
    I personally do not use alpha's encryption, not that there is anything wrong with it.
    if you need help with calling cryptoJS I'd be happy to give you a hand and code examples.
    cryptojs.gif

    If you want to stay with OpenSSL instead of OpenPGP then this is what you want. It is excellent and I have worked with it before.
    Last edited by mvaughn; 02-23-2015, 01:47 PM.

    Leave a comment:


  • aschone
    replied
    Re: A5_Encrypt_String and OpenSSL

    It appears that this has been a issue for some time now. I have found the following threads but no known solution.

    http://www.alphasoftware.com/alphafo...encrypt_string

    http://www.alphasoftware.com/alphafo...light=blowfish

    http://www.alphasoftware.com/alphafo...light=blowfish

    Leave a comment:


  • aschone
    replied
    Re: A5_Encrypt_String and OpenSSL

    I checked both dll's in both locations and they are for version 1.0.1k. The OpenSSL dll's were bigger but I am assuming that is because they were compiled to provide additional functionality that is above and beyond what the dll's for Alpha5 were compiled with. I did copy over the OpenSSL dll's to the Alpha5 directory. Reran the Alpha5 encryption and received the same result as previous.

    Leave a comment:


  • mvaughn
    replied
    Re: A5_Encrypt_String and OpenSSL

    Hi Andrew, it looks to me like you have the latest OpenSSL libraries ( v1.0.2) while your Alpha5 installation does not.
    Copy ssleay32.dll and libeay32.dll ( located in its root ) from your OpenSSL installation directory.
    Paste them into your Alpha 5 install ( C:\Program Files (x86)\a5V11 ).

    Hope that helps!
    Last edited by mvaughn; 02-21-2015, 10:32 AM.

    Leave a comment:


  • aschone
    started a topic A5_Encrypt_String and OpenSSL

    A5_Encrypt_String and OpenSSL

    I am attempting to encrypt a string in Alpha5 v11 3788-4187 using A5_Encrypt_String(). Then taking the output and using OpenSSL command line decrypt it. However I am missing something as it is currently not working for me.

    In Alpha5 Interactive I am running:
    Code:
    ?a5_encrypt_string("This is a test string.","This_Is_A_Test_Key")
    = "hr2neVjvu2cWKkAFOWiAm5/IU5X3yFll"
    Per Alphapedia Encryption Algorithms (Ciphers) the default is blowfish-cbc so I am using the following in OpenSSL

    Code:
    echo hr2neVjvu2cWKkAFOWiAm5/IU5X3yFll | c:\OPENSSL-Win64\bin\openssl.exe enc -base64 -A -nopad -d -bf-cbc -nosalt -pass pass:This_Is_A_Test_Key
    Which is resulting in
    Code:
    ┬ZS}≥┬τΩ+▬ÄsD)pΩε)‼▬¬┴►9
    So I then tried using OpenSSL to perform the encryption with:
    Code:
    echo This is a test string. | C:\OPENSSL-Win64\bin\openssl.exe enc -base64 -e -bf-cbc -nosalt -pass pass:This_Is_A_Test_Key
    This resulted in :
    Code:
    PdlVZVqXfJ3JqclfECVfLzrpPSXlquZPmhWFtyCrE/c=
    When I attempt to decrypt this with Alpha5 I get:
    Code:
    ?a5_decrypt_string("PdlVZVqXfJ3JqclfECVfLzrpPSXlquZPmhWFtyCrE/c=","This_Is_A_Test_Key")
    Error decrypting string.  Is your pass phrase correct?
    OpenSSL Description: error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt
    If I attempt to encrypt and decrypt using only Alpha5 then I am successful. Same is true when using OpenSSL to encrypt and decrypt. What I want to do is make the two play along nicely.
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