[英]unique_ptr and OpenSSL's STACK_OF(X509)*
I use some using
statements and unique_ptr
to work with OpenSSL, as suggested in another question . 如另一个问题中所述 ,我使用一些
using
语句和unique_ptr
与OpenSSL一起使用。 Without, code becomes really ugly and I am not so much a fan of goto statements. 没有它,代码将变得非常丑陋,我不是goto语句的忠实拥护者。
So far I have changed my code as far as possible. 到目前为止,我已尽可能地更改了代码。 Here are examples, what I use:
这是我使用的示例:
using BIO_ptr = std::unique_ptr<BIO, decltype(&::BIO_free)>;
using X509_ptr = std::unique_ptr<X509, decltype(&::X509_free)>;
using EVP_PKEY_ptr = std::unique_ptr<EVP_PKEY, decltype(&::EVP_PKEY_free)>;
using PKCS7_ptr = std::unique_ptr<PKCS7, decltype(&::PKCS7_free)>;
...
BIO_ptr tbio(BIO_new_file(some_filename, "r"), ::BIO_free);
Now I have the need of a STACK_OF(X509)
and I do not know, if this is also possible with unique_ptr
. 现在我需要一个
STACK_OF(X509)
,我不知道,是否也可以使用unique_ptr
。 I am looking for something similar to below, but this is not working. 我正在寻找与下面类似的东西,但这不起作用。
using STACK_OF_X509_ptr = std::unique_ptr<STACK_OF(X509), decltype(&::sk_X509_free)>;
I also tried the Functor: 我也尝试过Functor:
struct StackX509Deleter {
void operator()(STACK_OF(X509) *ptr) {
sk_X509_free(ptr);
}
};
using STACK_OF_X509_ptr = std::unique_ptr<STACK_OF(X509), StackX509Deleter>;
STACK_OF_X509_ptr chain(loadIntermediate(cert.string()));
The compiler accepts this and the application runs. 编译器接受这一点,然后应用程序运行。 Just one question: In other
unique_ptrs
as shown above, I always had specified a second argument, so I bet I am missing something: 只是一个问题:在上面显示的其他
unique_ptrs
中,我总是指定了第二个参数,所以我敢打赌我错过了一些东西:
STACK_OF_X509_ptr chain(loadIntermediate(cert.string()), ??????);
How do I use C++ unique_ptr
and OpenSSL's STACK_OF(X509)*
? 如何使用C ++
unique_ptr
和OpenSSL的STACK_OF(X509)*
?
I defined a regular function: 我定义了一个常规函数:
void stackOfX509Deleter(STACK_OF(X509) *ptr) {
sk_X509_free(ptr);
}
Then I use it in my code: 然后在代码中使用它:
using STACK_OF_X509_ptr = std::unique_ptr<STACK_OF(X509),
decltype(&stackOfX509Deleter)>;
STACK_OF_X509_ptr chain(loadIntermediate(cert.string()),
stackOfX509Deleter);
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