提交 715020e3 编写于 作者: D Dr. Stephen Henson

Add an FAQ.

上级 29528860
...@@ -67,6 +67,7 @@ OpenSSL - Frequently Asked Questions ...@@ -67,6 +67,7 @@ OpenSSL - Frequently Asked Questions
* Why doesn't my server application receive a client certificate? * Why doesn't my server application receive a client certificate?
* Why does compilation fail due to an undefined symbol NID_uniqueIdentifier? * Why does compilation fail due to an undefined symbol NID_uniqueIdentifier?
* I think I've detected a memory leak, is this a bug? * I think I've detected a memory leak, is this a bug?
* Why doesn't a memory BIO work when a file does?
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...@@ -916,5 +917,24 @@ thread-safe): ...@@ -916,5 +917,24 @@ thread-safe):
ERR_free_strings(), EVP_cleanup() and CRYPTO_cleanup_all_ex_data(). ERR_free_strings(), EVP_cleanup() and CRYPTO_cleanup_all_ex_data().
* Why doesn't a memory BIO work when a file does?
This can occur in several cases for example reading an S/MIME email message.
The reason is that a memory BIO can do one of two things when all the data
has been read from it.
The default behaviour is to indicate that no more data is available and that
the call should be retried, this is to allow the application to fill up the BIO
again if necessary.
Alternatively it can indicate that no more data is available and that EOF has
been reached.
If a memory BIO is to behave in the same way as a file this second behaviour
is needed. This must be done by calling:
BIO_set_mem_eof_return(bio, 0);
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