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-rw-r--r--src/build-data/os/linux.txt1
-rw-r--r--src/engine/dyn_engine/dyn_engine.cpp67
-rw-r--r--src/engine/dyn_engine/dyn_engine.h100
-rw-r--r--src/engine/dyn_engine/info.txt18
-rw-r--r--src/utils/dyn_load/dyn_load.cpp53
-rw-r--r--src/utils/dyn_load/dyn_load.h56
-rw-r--r--src/utils/dyn_load/info.txt13
7 files changed, 308 insertions, 0 deletions
diff --git a/src/build-data/os/linux.txt b/src/build-data/os/linux.txt
index 8bfacd4c9..4c0965764 100644
--- a/src/build-data/os/linux.txt
+++ b/src/build-data/os/linux.txt
@@ -5,4 +5,5 @@ clock_gettime
gettimeofday
posix_mlock
gmtime_r
+dlopen
</target_features>
diff --git a/src/engine/dyn_engine/dyn_engine.cpp b/src/engine/dyn_engine/dyn_engine.cpp
new file mode 100644
index 000000000..2dc76d7d6
--- /dev/null
+++ b/src/engine/dyn_engine/dyn_engine.cpp
@@ -0,0 +1,67 @@
+/**
+* Dynamically Loaded Engine
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/dyn_engine.h>
+#include <botan/internal/dyn_load.h>
+
+namespace Botan {
+
+namespace {
+
+extern "C" {
+ typedef Engine* (*creator_function)(void);
+ typedef void (*destructor_function)(Engine*);
+}
+
+}
+
+Dynamically_Loaded_Engine::Dynamically_Loaded_Engine(
+ const std::string& library_path) :
+ engine(0)
+ {
+ lib = new Dynamically_Loaded_Library(library_path);
+
+ try
+ {
+ creator_function creator = lib->resolve<creator_function>("create_engine");
+
+ engine = creator();
+
+ if(!engine)
+ throw std::runtime_error("Creator function in " + library_path + " failed");
+ }
+ catch(...)
+ {
+ delete lib;
+ lib = 0;
+ throw;
+ }
+ }
+
+Dynamically_Loaded_Engine::~Dynamically_Loaded_Engine()
+ {
+ if(lib && engine)
+ {
+ try
+ {
+ destructor_function destroy =
+ lib->resolve<destructor_function>("destroy_engine");
+ destroy(engine);
+ }
+ catch(...)
+ {
+ delete lib;
+ lib = 0;
+ throw;
+ }
+ }
+
+ if(lib)
+ delete lib;
+ }
+
+}
diff --git a/src/engine/dyn_engine/dyn_engine.h b/src/engine/dyn_engine/dyn_engine.h
new file mode 100644
index 000000000..46752f5a9
--- /dev/null
+++ b/src/engine/dyn_engine/dyn_engine.h
@@ -0,0 +1,100 @@
+/**
+* Dynamically Loaded Engine
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/engine.h>
+
+namespace Botan {
+
+/**
+* Dynamically_Loaded_Engine just proxies the requests to the underlying
+* Engine object, and handles load/unload details
+*/
+class BOTAN_DLL Dynamically_Loaded_Engine : public Engine
+ {
+ public:
+ /**
+ * @param lib_path full pathname to DLL to load
+ */
+ Dynamically_Loaded_Engine(const std::string& lib_path);
+
+ ~Dynamically_Loaded_Engine();
+
+ std::string provider_name() const { return engine->provider_name(); }
+
+ BlockCipher* find_block_cipher(const SCAN_Name& algo_spec,
+ Algorithm_Factory& af) const
+ {
+ return engine->find_block_cipher(algo_spec, af);
+ }
+
+ StreamCipher* find_stream_cipher(const SCAN_Name& algo_spec,
+ Algorithm_Factory& af) const
+ {
+ return engine->find_stream_cipher(algo_spec, af);
+ }
+
+ HashFunction* find_hash(const SCAN_Name& algo_spec,
+ Algorithm_Factory& af) const
+ {
+ return engine->find_hash(algo_spec, af);
+ }
+
+ MessageAuthenticationCode* find_mac(const SCAN_Name& algo_spec,
+ Algorithm_Factory& af) const
+ {
+ return engine->find_mac(algo_spec, af);
+ }
+
+ Modular_Exponentiator* mod_exp(const BigInt& n,
+ Power_Mod::Usage_Hints hints) const
+ {
+ return engine->mod_exp(n, hints);
+ }
+
+ Keyed_Filter* get_cipher(const std::string& algo_spec,
+ Cipher_Dir dir,
+ Algorithm_Factory& af)
+ {
+ return engine->get_cipher(algo_spec, dir, af);
+ }
+
+ PK_Ops::Key_Agreement*
+ get_key_agreement_op(const Private_Key& key) const
+ {
+ return engine->get_key_agreement_op(key);
+ }
+
+ PK_Ops::Signature*
+ get_signature_op(const Private_Key& key) const
+ {
+ return engine->get_signature_op(key);
+ }
+
+ PK_Ops::Verification*
+ get_verify_op(const Public_Key& key) const
+ {
+ return engine->get_verify_op(key);
+ }
+
+ PK_Ops::Encryption*
+ get_encryption_op(const Public_Key& key) const
+ {
+ return engine->get_encryption_op(key);
+ }
+
+ PK_Ops::Decryption*
+ get_decryption_op(const Private_Key& key) const
+ {
+ return engine->get_decryption_op(key);
+ }
+
+ private:
+ class Dynamically_Loaded_Library* lib;
+ Engine* engine;
+ };
+
+}
diff --git a/src/engine/dyn_engine/info.txt b/src/engine/dyn_engine/info.txt
new file mode 100644
index 000000000..469583522
--- /dev/null
+++ b/src/engine/dyn_engine/info.txt
@@ -0,0 +1,18 @@
+define DYNAMICALLY_LOADED_ENGINE
+
+<header:public>
+dyn_engine.h
+</header:public>
+
+<source>
+dyn_engine.cpp
+</source>
+
+<requires>
+engine
+dyn_load
+</requires>
+
+<libs>
+linux -> dl
+</libs>
diff --git a/src/utils/dyn_load/dyn_load.cpp b/src/utils/dyn_load/dyn_load.cpp
new file mode 100644
index 000000000..621737d0c
--- /dev/null
+++ b/src/utils/dyn_load/dyn_load.cpp
@@ -0,0 +1,53 @@
+/**
+* Dynamically Loaded Object
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/internal/dyn_load.h>
+#include <botan/build.h>
+#include <stdexcept>
+
+#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
+ #include <dlfcn.h>
+#endif
+
+namespace Botan {
+
+Dynamically_Loaded_Library::Dynamically_Loaded_Library(
+ const std::string& library) :
+ lib_name(library), lib(0)
+ {
+#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
+ lib = ::dlopen(lib_name.c_str(), RTLD_LAZY);
+
+ if(!lib)
+ throw std::runtime_error("Failed to load engine " + lib_name);
+#endif
+
+ }
+
+Dynamically_Loaded_Library::~Dynamically_Loaded_Library()
+ {
+#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
+ ::dlclose(lib);
+#endif
+ }
+
+void* Dynamically_Loaded_Library::resolve_symbol(const std::string& symbol)
+ {
+ void* addr = 0;
+
+#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
+ addr = ::dlsym(lib, symbol.c_str());
+#endif
+
+ if(!addr)
+ throw std::runtime_error("Failed to resolve symbol " + symbol +
+ " in " + lib_name);
+
+ return addr;
+ }
+
+}
diff --git a/src/utils/dyn_load/dyn_load.h b/src/utils/dyn_load/dyn_load.h
new file mode 100644
index 000000000..d5476b389
--- /dev/null
+++ b/src/utils/dyn_load/dyn_load.h
@@ -0,0 +1,56 @@
+/**
+* Dynamically Loaded Object
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_DYNAMIC_LOADER_H__
+#define BOTAN_DYNAMIC_LOADER_H__
+
+#include <string>
+
+namespace Botan {
+
+class Dynamically_Loaded_Library
+ {
+ public:
+ /**
+ * Load a DLL (or fail with an exception)
+ * @param lib_name name or path to a library
+ */
+ Dynamically_Loaded_Library(const std::string& lib_name);
+
+ /**
+ * Unload the DLL
+ * @warning Any pointers returned by resolve()/resolve_symbol()
+ * should not be used after this destructor runs.
+ */
+ ~Dynamically_Loaded_Library();
+
+ /**
+ * Load a symbol (or fail with an exception)
+ * @param symbol names the symbol to load
+ * @return address of the loaded symbol
+ */
+ void* resolve_symbol(const std::string& symbol);
+
+ /**
+ * Convenience function for casting symbol to the right type
+ * @param symbol names the symbol to load
+ * @return address of the loaded symbol
+ */
+ template<typename T>
+ T resolve(const std::string& symbol)
+ {
+ return reinterpret_cast<T>(resolve_symbol(symbol));
+ }
+
+ private:
+ std::string lib_name;
+ void* lib;
+ };
+
+}
+
+#endif
diff --git a/src/utils/dyn_load/info.txt b/src/utils/dyn_load/info.txt
new file mode 100644
index 000000000..208870dac
--- /dev/null
+++ b/src/utils/dyn_load/info.txt
@@ -0,0 +1,13 @@
+define DYNAMIC_LOADER
+
+<libs>
+linux -> dl
+</libs>
+
+<source>
+dyn_load.cpp
+</source>
+
+<header:internal>
+dyn_load.h
+</header:internal>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 04:54:41 +0000