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  1. #1
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    Cryptography and export

    How are the cryptography classes implemented for the Windows version? Do they link to the Windows cryptography support, or is OpenSSL or some such embedded in the Qt libraries?

    If the latter, it would seem to present a roadblock for shipping a PC-based Qt application from the US to other countries, since any code containing encryption software must be "blessed" by US authorities.

    Has anyone addressed this point?

  2. #2
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    Re: Cryptography and export

    Quote Originally Posted by danhicksbyron View Post
    How are the cryptography classes implemented for the Windows version? Do they link to the Windows cryptography support, or is OpenSSL or some such embedded in the Qt libraries?

    If the latter, it would seem to present a roadblock for shipping a PC-based Qt application from the US to other countries, since any code containing encryption software must be "blessed" by US authorities.

    Has anyone addressed this point?
    From the documentation it states that

    Due to import and export restrictions in some parts of the world, we are unable to supply the OpenSSL Toolkit with Qt packages. Developers wishing to use SSL communication in their deployed applications should either ensure that their users have the appropriate libraries installed, or they should consult a suitably qualified legal professional to ensure that applications using code from the OpenSSL project are correctly certified for import and export in relevant regions of the world.

  3. #3
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    Re: Cryptography and export

    So the Qt cryptography interfaces link to the OpenSSL library which may or may not be installed?

    [OK, I see only CryptographicHash is supplied outside of the SSL stuff, and it should be "safe".]

  4. #4
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    Re: Cryptography and export

    Yes, that is what my understanding is after reading the documentation.

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