Hello,

I am working on reworking existing code that uses several OpenSSL APIs
from using files to store keys, certificates and CAs to passing this
directly from memory (so that it can be retrieved from memory, read
from encrypted storage among other things).

This is my first post here, so if this is not the correct group and/or
anything below seems obvious/completely incorrect, please feel free to
correct me.

Our code currently uses the following APIs:

- SSL_CTX_use_certificate_file and SSL_CTX_use_PrivateKey_file

This part seems easier. From what I understand, I can use BIO_s_mem
and pass it key/certificate data from memory. I could then use PEM to
get EVP_PKEY or X509.

Then I could just invoke SSL_CTX_use_certificate() and
SSL_CTX_use_PrivateKey() directly.

In practice it may be a bit more complex, but at least I know the solution.

- SSL_CTX_load_verify_locations and SSL_CTX_set_client_CA_lis

This part is the harder one. I was not able to find any APIs to do this.

Another alternative I was wondering about is whether I can provide
another way for OpenSSL to access the keys - i.e. so that I can tell
that filename is something like mystorage://key1.pem and OpenSSL would
use my BIO (or create BIO_s_mem and preload it with data) instead of
BIO_s_file.

Thanks.

-- 
WK
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