Hello, after serveral tests (and reading a lot of howto's) I'm now fairly convinced that the Solaris HW-crypto engine is not automatically used. Even when dovecot ist compiled with the OpenSSL version provided by Solaris.
Currently I have only a T1-CPU available for testing (Sun Fire T2000) and after patching src/login-common/ssl-proxy-openssl.c (Dovecot 1.2.17) with
ENGINE *e; ENGINE_load_builtin_engines(); ENGINE_init((e=ENGINE_by_id("pkcs11"))); ENGINE_set_default_RSA(e); ENGINE_set_default_DSA(e); ENGINE_set_default_ciphers(e);
in ssl_proxy_init() and inserting ENGINE_cleanup(); in ssl_proxy_deinit() the crypto device gets used. I'm sure that this is not the whole story since this only seems to affect the IMAP login.
One has to use the specific SSL-engine and the ENGINE/EVP calls (as stated in the various articles). Is there any chance that Dovecot gets updated/patched for this ? E.g. Like the SSLCryptoDevice setting in Apache's mod_ssl.
Regards. Martin
Chris Hoogendyk wrote:
On 4/18/11 6:30 AM, Martin Preen wrote:
Hello, I tried to find out how about to use the hardware crypto engines under Solaris (Sun Fire T2000). It seems, that its not just a compilation issue:
For operations that are to be offloaded, it is necessary to restrict use to subset of OpenSSL functions (the EVP_ functions) and explicitly indicate the use of the PKCS11 engine; something like the following works for bulk ciphers (the process for RSA is similar):
ENGINE *e; ENGINE_load_builtin_engines(); e = ENGINE_by_id("pkcs11"); ENGINE_set_default_ciphers(e); EVP_CIPHER_CTX_init (&ctx); EVP_EncryptInit (&ctx, EVP_des_cbc (), key, iv); EVP_EncryptUpdate (.....);
Since I'm not familiar with SSL programming, I wonder if it's possible to modify the dovecot 1.2.x source code. Maybe someone has already tried this or can give me hint.
You don't want to do that.
The objective is for the ssl engine to be low level and basically invisible to layers of application above that use it. So, build openssl properly and it just works for everything else.
I'm not at work today, so I don't have reference to my notes. Ah, just found an email I sent to my colleagues -- copied it below.
Martin Preen, Universität Freiburg, Institut für Informatik Georges-Koehler-Allee 52, Raum EG-006, 79110 Freiburg, Germany
phone: ++49 761 203-8250 preen@informatik.uni-freiburg.de fax: ++49 761 203-8242 swt.informatik.uni-freiburg.de/~preen