Delphi 中的免费数字签名库
有没有实现数字签名的免费库？我需要它在 Delphi 2010 中工作并且便于移植。我所说的可移植是指该库实现实际的算法，而不是使用 Windows API。
TurboPower LockBox 对我不起作用：这里有一个解释。
Are there any free libraries that implement digital signature? I need it to work in Delphi 2010 and to be portable. By portable I mean that the library implements the actual algorithms, rather than uses Windows API.
TurboPower LockBox doesn't work for me: here's an expalantion.
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OpenSSL 应该可以工作。它是免费的，并且可以在许多不同的平台上运行。它不是一个“Delphi”库，而只是一个 API，但可以从 Delphi 应用程序调用它。
OpenSSL should work. It's free and runs on many different platforms. It isn't a "Delphi" library but rather just an API, but it could be called from a Delphi application.
您可以在 http://sourceforge.net/projects/openstrsecii 上获得免费且快速的实施
方案不确定它是否能像 Delphi 2010 一样工作...
OpenSSL 是一个很棒的项目，您可以在 http://www.ararat.cz/synapse/doku.php/public:howto:sslplugin
You've got a free and fast implementation available at http://sourceforge.net/projects/openstrsecii
I'm not sure it will work as is with Delphi 2010...
OpenSSL is a great project, and you've got a Delphi use at http://www.ararat.cz/synapse/doku.php/public:howto:sslplugin
并不完全免费，但我们的 SecureBlackbox 产品的签名功能只需要任何软件包的任何许可证，并且价格为有些套餐价格低于 100 美元。
请注意，以这个价格，您可以获得相当广泛的功能，涵盖使用 RSA、DSA（仅签名）和椭圆曲线的 PKCS#1 和 PKCS#7 签名和加密，以及对称加密、广泛的证书支持等等。
或者，您可以使用 OpenSSL 接口，它也提供广泛的功能并且是免费的。然而，它的 API 远不容易理解，而且与任何免费软件一样，其支持也值得怀疑。
Not exactly free, but signing functions of our SecureBlackbox product need just any license for any package, and prices for some packages are below $100.
Note, that for this price you get quite extensive functionality that covers PKCS#1 and PKCS#7 signing and encryption using RSA, DSA (signing only) and Elliptic Curves, as well as symmetric encryption, extensive certificate support and much more.
Alternatively you can use interface to OpenSSL, which also offers wide range of functions and is free. However, it's API is far from easy to understand, and as with any free software, support is questionable.