Fix OpenSSL library loading for MariaDB authentication plugins (#233)

MariaDB authentication plugins (e.g., caching_sha2_password) depend on
OpenSSL, but when MariaDB loads them via dlopen at runtime, the dynamic
linker can't find OpenSSL because it's in a different JLL artifact.

This fix pre-loads OpenSSL libraries with RTLD_GLOBAL when the API module
initializes. This makes OpenSSL symbols globally available to subsequently
loaded libraries, allowing the plugins to find them.

Fixes #232

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: quinnj

Project.toml

@@ -1,14 +1,15 @@
 name = "MySQL"
 uuid = "39abe10b-433b-5dbd-92d4-e302a9df00cd"
 author = ["quinnj"]
-version = "1.5.0"
+version = "1.5.1"
 
 [deps]
 DBInterface = "a10d1c49-ce27-4219-8d33-6db1a4562965"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
 DecFP = "55939f99-70c6-5e9b-8bb0-5071ed7d61fd"
 Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 MariaDB_Connector_C_jll = "aabc7e14-95f1-5e66-9f32-aea603782360"
+OpenSSL_jll = "458c3c95-2e84-50aa-8efc-19380b2a3a95"
 Parsers = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
@@ -17,6 +18,7 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 DBInterface = "2.5"
 DecFP = "0.4.9, 0.4.10, 1"
 MariaDB_Connector_C_jll = "3.1.12"
+OpenSSL_jll = "3"
 Parsers = "0.3, 1, 2"
 Tables = "1"
 julia = "1.6"

src/api/API.jl

@@ -1,12 +1,27 @@
 module API
 
-using Dates, DecFP
+using Dates, DecFP, Libdl
 
 export DateAndTime
 
 using MariaDB_Connector_C_jll
+using OpenSSL_jll: libssl, libcrypto
+
 const PLUGIN_DIR = joinpath(MariaDB_Connector_C_jll.artifact_dir, "lib", "mariadb", "plugin")
 
+# Pre-load OpenSSL libraries so they're available when MariaDB loads plugins.
+# MariaDB authentication plugins (e.g., caching_sha2_password) depend on OpenSSL,
+# but when MariaDB loads them via dlopen, the dynamic linker can't find OpenSSL
+# because it's in a different artifact. By loading OpenSSL with RTLD_GLOBAL first,
+# its symbols become available to subsequently loaded libraries.
+# See: https://github.com/JuliaDatabases/MySQL.jl/issues/232
+function __init__()
+    @static if !Sys.iswindows()
+        Libdl.dlopen(libcrypto, Libdl.RTLD_GLOBAL)
+        Libdl.dlopen(libssl, Libdl.RTLD_GLOBAL)
+    end
+end
+
 # const definitions from mysql client library
 include("consts.jl")