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My Debian squeeze server is running mysqld version 5.1. How do I determine if the SSL libraries it is using are OpenSSL or yaSSL?

(I am pretty sure this MySQL supports SSL as the User table has the ssl_type column.)

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What OS? If GNU/Linux, which distro? – MadHatter Feb 11 '13 at 16:36
It is on Debian squeeze (I will update my question). – user35042 Feb 11 '13 at 16:47
up vote 2 down vote accepted

Run LDD on the MySql executable to see what it is linked against.

#ldd mysqld
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ldd `which mysqld`|grep ssl

it will show that your MySQL is linked to witch SSL library.

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Unfortunately, that command yielded nothing. – user35042 Feb 11 '13 at 16:49
Then maybe your MySQL not compiled with SSL support, check out 3rd section here: try – Stone Feb 11 '13 at 16:51
That was a good suggestion; it seems that my MySQL supports SSL but the have_ssl variable is DISABLED; I think there is something wrong with my MySQL installation or binary. – user35042 Feb 11 '13 at 17:17
I got MySQL to work with SSL but there are no libraries linked in with mysqld that match ssl, – user35042 Feb 12 '13 at 0:32

According to this blog post, the MySQL packages in Debian don't include TLS support due to licensing issues. That post is fairly old, but based on the mysql-server-core-5.1 package not having a dependency on OpenSSL or GnuTLS I suspect that this is still true.

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If you want to know from within MySQL you can check the status variable Rsa_public_key as it only exists in builds with OpenSSL:

SHOW STATUS LIKE 'Rsa_public_key';

(See the relevant documentation:

PS: Currently, the MySQL Community Edition binaries built by MySQL are using yaSSL, but e.g. Percona XtraDB Cluster binaries are built using OpenSSL. YMMV

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