Import patch from yaSSL

- avoid allocating memory for each call to 'EVP_md5' and 
   'EVP_des_ede3_cbc' which were not released until server was stopped
 - Those functions are used from the SQL function 'des_encrypt' and
   'des_decrypt'.

extra/yassl/include/openssl/ssl.h

@@ -377,11 +377,9 @@ char* SSL_state_string_long(SSL*);
 
 
 /* EVP stuff, des and md5, different file? */
-typedef struct Digest Digest;
+typedef char EVP_MD;
-typedef Digest EVP_MD;
 
-typedef struct BulkCipher BulkCipher;
+typedef char EVP_CIPHER;
-typedef BulkCipher EVP_CIPHER;
 
 typedef struct EVP_PKEY EVP_PKEY;
 

extra/yassl/include/yassl_int.hpp

@@ -127,25 +127,6 @@ private:
 };
 
 
-// hold add crypt references provided to callers
-class CryptProvider {
-    mySTL::list<Digest*>     digestList_;
-    mySTL::list<BulkCipher*> cipherList_;
-    CryptProvider() {}                         // only GetCryptProvider creates
-public:
-    ~CryptProvider();
-
-    Digest*     NewMd5();
-    BulkCipher* NewDesEde();
-
-    friend CryptProvider& GetCryptProvider();
-private:
-    CryptProvider(const CryptProvider&);            // hide copy
-    CryptProvider& operator=(const CryptProvider&); // and assign
-};
-
-CryptProvider& GetCryptProvider();
-
 #undef X509_NAME  // wincrypt.h clash
 
 // openSSL X509 names

extra/yassl/src/ssl.cpp

@@ -811,25 +811,34 @@ const char* X509_verify_cert_error_string(long /* error */)
 
 const EVP_MD* EVP_md5(void)
 {
-    return GetCryptProvider().NewMd5();
+    static const char* type = "MD5";
+    return type;
 }
 
 
 const EVP_CIPHER* EVP_des_ede3_cbc(void)
 {
-    return GetCryptProvider().NewDesEde();
+    static const char* type = "DES_EDE3_CBC";
+    return type;
 }
 
 
 int EVP_BytesToKey(const EVP_CIPHER* type, const EVP_MD* md, const byte* salt,
                    const byte* data, int sz, int count, byte* key, byte* iv)
 {
-    EVP_MD* myMD = const_cast<EVP_MD*>(md);
+    // only support MD5 for now
-    uint digestSz = myMD->get_digestSize();
+    if (strncmp(md, "MD5", 3)) return 0;
+
+    // only support DES_EDE3_CBC for now
+    if (strncmp(type, "DES_EDE3_CBC", 12)) return 0; 
+
+    yaSSL::MD5 myMD;
+    uint digestSz = myMD.get_digestSize();
     byte digest[SHA_LEN];                   // max size
 
-    int keyLen    = type->get_keySize();
+    yaSSL::DES_EDE cipher;
-    int ivLen     = type->get_ivSize();
+    int keyLen    = cipher.get_keySize();
+    int ivLen     = cipher.get_ivSize();
     int keyLeft   = keyLen;
     int ivLeft    = ivLen;
     int keyOutput = 0;
@@ -838,17 +847,17 @@ int EVP_BytesToKey(const EVP_CIPHER* type, const EVP_MD* md, const byte* salt,
         int digestLeft = digestSz;
         // D_(i - 1)
         if (keyOutput)                      // first time D_0 is empty
-            myMD->update(digest, digestSz);
+            myMD.update(digest, digestSz);
         // data
-        myMD->update(data, sz);
+        myMD.update(data, sz);
         // salt
         if (salt)
-            myMD->update(salt, EVP_SALT_SZ);
+            myMD.update(salt, EVP_SALT_SZ);
-        myMD->get_digest(digest);
+        myMD.get_digest(digest);
         // count
         for (int j = 1; j < count; j++) {
-            myMD->update(digest, digestSz);
+            myMD.update(digest, digestSz);
-            myMD->get_digest(digest);
+            myMD.get_digest(digest);
         }
 
         if (keyLeft) {

extra/yassl/src/template_instnt.cpp

@@ -86,7 +86,6 @@ template void ysDelete<X509>(X509*);
 template void ysDelete<Message>(Message*);
 template void ysDelete<sslFactory>(sslFactory*);
 template void ysDelete<Sessions>(Sessions*);
-template void ysDelete<CryptProvider>(CryptProvider*);
 template void ysArrayDelete<unsigned char>(unsigned char*);
 template void ysArrayDelete<char>(char*);
 }

extra/yassl/src/yassl_int.cpp

@@ -1382,38 +1382,6 @@ sslFactory& GetSSL_Factory()
 }
 
 
-static CryptProvider* cryptProviderInstance = 0;
-
-CryptProvider& GetCryptProvider()
-{
-    if (!cryptProviderInstance)
-        cryptProviderInstance = NEW_YS CryptProvider;
-    return *cryptProviderInstance;
-}
-
-
-CryptProvider::~CryptProvider()
-{
-    mySTL::for_each(digestList_.begin(), digestList_.end(), del_ptr_zero());
-    mySTL::for_each(cipherList_.begin(), cipherList_.end(), del_ptr_zero());
-}
-
-
-Digest* CryptProvider::NewMd5()
-{
-    Digest* ptr = NEW_YS MD5();
-    digestList_.push_back(ptr);
-    return ptr;
-}
-
-
-BulkCipher* CryptProvider::NewDesEde()
-{
-    BulkCipher* ptr = NEW_YS DES_EDE();
-    cipherList_.push_back(ptr);
-    return ptr;
-}
-
 
 typedef Mutex::Lock Lock;
 
@@ -2106,12 +2074,10 @@ ASN1_STRING* StringHolder::GetString()
 extern "C" void yaSSL_CleanUp()
 {
     TaoCrypt::CleanUp();
-    yaSSL::ysDelete(yaSSL::cryptProviderInstance);
     yaSSL::ysDelete(yaSSL::sslFactoryInstance);
     yaSSL::ysDelete(yaSSL::sessionsInstance);
 
     // In case user calls more than once, prevent seg fault
-    yaSSL::cryptProviderInstance = 0;
     yaSSL::sslFactoryInstance = 0;
     yaSSL::sessionsInstance = 0;
 }