more robust implementation and better interface to engine registrator; refs #11

src/openssl-engine.hxx

@@ -180,33 +180,40 @@ namespace openssl {
       }
       static int init(ENGINE* e) {
         OPENSSL_LOG("log");
-        return _map[e]->init();
+        Map::iterator it(_map.find(e));
+        return it!=_map.end()?it->second->init():0;
       }
       static int finish(ENGINE* e) {
         OPENSSL_LOG("log");
-        return _map[e]->finish();
+        Map::iterator it(_map.find(e));
+        return it!=_map.end()?it->second->finish():0;
       }
       static int ctrl(ENGINE* e, int cmd, long i, void* p, void(*f)()) {
         OPENSSL_LOG("log");
-        return _map[e]->ctrl(cmd, i, p, f);
+        Map::iterator it(_map.find(e));
+        return it!=_map.end()?it->second->ctrl(cmd, i, p, f):0;
       }
       static EVP_PKEY* pubkey(ENGINE* e, const char* c, UI_METHOD* u, void* d) {
         OPENSSL_LOG("log");
-        return _map[e]->pubkey(c, u, d);
+        Map::iterator it(_map.find(e));
+        return it!=_map.end()?it->second->pubkey(c, u, d):0;
       }
       static EVP_PKEY* privkey(ENGINE* e, const char* c, UI_METHOD* u, void* d) {
         OPENSSL_LOG("log");
-        return _map[e]->privkey(c, u, d);
+        Map::iterator it(_map.find(e));
+        return it!=_map.end()?it->second->privkey(c, u, d):0;
       }
       static int rsaEncrypt(int flen,const unsigned char *from,
 			    unsigned char *to,
 			    RSA *rsa, int padding) {
         OPENSSL_LOG("log");
-        return _map[rsa->engine]->rsaEncrypt();
+        Map::iterator it(_map.find(rsa->engine));
+        return it!=_map.end()?it->second->rsaEncrypt():0;
       }
       static int rsaDecrypt(int flen, const unsigned char *from, unsigned char *to, RSA *rsa, int padding) {
         OPENSSL_LOG("log");
-        return _map[rsa->engine]->rsaDecrypt();
+        Map::iterator it(_map.find(rsa->engine));
+        return it!=_map.end()?it->second->rsaDecrypt():0;
       }
       static int rsaSign(int type, const unsigned char *from,
                          unsigned int flen,
@@ -214,9 +221,11 @@ namespace openssl {
                          unsigned int*tlen,
                          const RSA *rsa) {
         OPENSSL_LOG("log");
+        Map::iterator it(_map.find(rsa->engine));
+        if (it==_map.end()) return 0;
         try {
-          std::string res(_map[rsa->engine]
-                          ->rsaSign(std::string((const char*)from, flen),
+          std::string res(it->second->rsaSign
+                          (std::string((const char*)from, flen),
                            type));
           OPENSSL_LOG("to="<<(void*)to<<"; len="<<*tlen);
           OPENSSL_LOG("siglen="<<res.size());
@@ -232,11 +241,13 @@ namespace openssl {
                            unsigned int,  OPENSSL_V0_CONST unsigned char*,
                            unsigned int, const RSA* rsa) {
         OPENSSL_LOG("log");
-        return _map[rsa->engine]->rsaVerify();
+        Map::iterator it(_map.find(rsa->engine));
+        return it!=_map.end()?it->second->rsaVerify():0;
       }
       static int rsaFinish(RSA *rsa) {
         OPENSSL_LOG("log");
-        return _map[rsa->engine]->rsaFinish();
+        Map::iterator it(_map.find(rsa->engine));
+        return it!=_map.end()?it->second->rsaFinish():0;
       }
       
     protected:
@@ -261,7 +272,8 @@ namespace openssl {
 
     private:
 
-      static std::map<ENGINE*, Engine*> _map;
+      typedef std::map<ENGINE*, Engine*> Map;
+      static Map _map;
       static std::map<std::string, Engine*> _prototypes;
   };
 
@@ -270,10 +282,19 @@ namespace openssl {
   class RegisterEngine {
     public:
       RegisterEngine(Engine* e): _e(e) {
-        EngineMapper::add(_e);
+        if (_e) EngineMapper::add(_e);
       }
       ~RegisterEngine() {
-        EngineMapper::remove(_e);
+        if (_e) EngineMapper::remove(_e);
+      }
+      operator Engine*() {
+        return _e;
+      }
+       Engine* operator->() {
+        return _e;
+      }
+       Engine& operator*() {
+        return *_e;
       }
     private:
       Engine* _e;