sk_*_push() returns the number of items on the stack, not the index of the
[openssl.git] / crypto / cryptlib.c
index 4bad40c2dfe3423c415c5b15213bb1ab2e13ac8c..830ccc9816fed171af843429023e35e9fd9481cf 100644 (file)
@@ -1,4 +1,57 @@
 /* crypto/cryptlib.c */
+/* ====================================================================
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
  * copied and put under another distribution licence
  * [including the GNU Public Licence.]
  */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * ECDH support in OpenSSL originally developed by 
+ * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
+ */
 
 #include <stdio.h>
 #include <string.h>
 #include <openssl/crypto.h>
 #include <openssl/safestack.h>
 
-#if defined(WIN32) || defined(WIN16)
+#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
 #endif
 
-DECLARE_STACK_OF(CRYPTO_dynlock);
-IMPLEMENT_STACK_OF(CRYPTO_dynlock);
+DECLARE_STACK_OF(CRYPTO_dynlock)
+IMPLEMENT_STACK_OF(CRYPTO_dynlock)
 
 /* real #defines in crypto.h, keep these upto date */
 static const char* lock_names[CRYPTO_NUM_LOCKS] =
        {
        "<<ERROR>>",
        "err",
-       "err_hash",
+       "ex_data",
        "x509",
        "x509_info",
        "x509_pkey",
@@ -89,7 +147,9 @@ static const char* lock_names[CRYPTO_NUM_LOCKS] =
        "ssl_session",
        "ssl_sess_cert",
        "ssl",
+       "ssl_method",
        "rand",
+       "rand2",
        "debug_malloc",
        "BIO",
        "gethostbyname",
@@ -100,7 +160,13 @@ static const char* lock_names[CRYPTO_NUM_LOCKS] =
        "debug_malloc2",
        "dso",
        "dynlock",
-#if CRYPTO_NUM_LOCKS != 28
+       "engine",
+       "ui",
+       "ecdsa",
+       "ec",
+       "ecdh",
+       "bn",
+#if CRYPTO_NUM_LOCKS != 36
 # error "Inconsistency between crypto.h and cryptlib.c"
 #endif
        };
@@ -122,7 +188,7 @@ static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
        (const char *file,int line)=NULL;
-static void (MS_FAR *dynlock_locking_callback)(int mode,
+static void (MS_FAR *dynlock_lock_callback)(int mode,
        struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
        const char *file,int line)=NULL;
@@ -132,11 +198,11 @@ int CRYPTO_get_new_lockid(char *name)
        char *str;
        int i;
 
+#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
        /* A hack to make Visual C++ 5.0 work correctly when linking as
         * a DLL using /MT. Without this, the application cannot use
         * and floating point printf's.
         * It also seems to be needed for Visual C 1.5 (win16) */
-#if defined(WIN32) || defined(WIN16)
        SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 #endif
 
@@ -175,7 +241,7 @@ int CRYPTO_get_new_dynlockid(void)
                }
        CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
        if ((dyn_locks == NULL)
-               && ((dyn_locks=sk_new_null()) == NULL))
+               && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
                {
                CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
                CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
@@ -199,10 +265,22 @@ int CRYPTO_get_new_dynlockid(void)
                }
 
        CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
-       i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
+       /* First, try to find an existing empty slot */
+       i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
+       /* If there was none, push, thereby creating a new one */
+       if (i == -1)
+               /* Since sk_push() returns the number of items on the
+                  stack, not the location of the pushed item, we need
+                  to transform the returned number into a position,
+                  by decreasing it.  */
+               i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
+       else
+               /* If we found a place with a NULL pointer, put our pointer
+                  in it.  */
+               sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
        CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 
-       if (!i)
+       if (i == -1)
                {
                dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
                OPENSSL_free(pointer);
@@ -223,7 +301,10 @@ void CRYPTO_destroy_dynlockid(int i)
        CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 
        if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
+               {
+               CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
                return;
+               }
        pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
        if (pointer != NULL)
                {
@@ -236,7 +317,7 @@ void CRYPTO_destroy_dynlockid(int i)
                        }
                else
 #endif
-                       if (--(pointer->references) <= 0)
+                       if (pointer->references <= 0)
                                {
                                sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
                                }
@@ -246,7 +327,10 @@ void CRYPTO_destroy_dynlockid(int i)
        CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 
        if (pointer)
+               {
                dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
+               OPENSSL_free(pointer);
+               }
        }
 
 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
@@ -269,16 +353,47 @@ struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
        return NULL;
        }
 
-void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
-               int line)
+struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
+       (const char *file,int line)
        {
-       return(locking_callback);
+       return(dynlock_create_callback);
        }
 
 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
        struct CRYPTO_dynlock_value *l, const char *file,int line)
        {
-       return(dynlock_locking_callback);
+       return(dynlock_lock_callback);
+       }
+
+void (*CRYPTO_get_dynlock_destroy_callback(void))
+       (struct CRYPTO_dynlock_value *l, const char *file,int line)
+       {
+       return(dynlock_destroy_callback);
+       }
+
+void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
+       (const char *file, int line))
+       {
+       dynlock_create_callback=func;
+       }
+
+void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
+       struct CRYPTO_dynlock_value *l, const char *file, int line))
+       {
+       dynlock_lock_callback=func;
+       }
+
+void CRYPTO_set_dynlock_destroy_callback(void (*func)
+       (struct CRYPTO_dynlock_value *l, const char *file, int line))
+       {
+       dynlock_destroy_callback=func;
+       }
+
+
+void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
+               int line)
+       {
+       return(locking_callback);
        }
 
 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
@@ -293,12 +408,6 @@ void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
        locking_callback=func;
        }
 
-void CRYPTO_set_dynlock_locking_callback(void (*func)(int mode,
-       struct CRYPTO_dynlock_value *l, const char *file, int line))
-       {
-       dynlock_locking_callback=func;
-       }
-
 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
                                              const char *file,int line))
        {
@@ -321,9 +430,9 @@ unsigned long CRYPTO_thread_id(void)
 
        if (id_callback == NULL)
                {
-#ifdef WIN16
+#ifdef OPENSSL_SYS_WIN16
                ret=(unsigned long)GetCurrentTask();
-#elif defined(WIN32)
+#elif defined(OPENSSL_SYS_WIN32)
                ret=(unsigned long)GetCurrentThreadId();
 #elif defined(GETPID_IS_MEANINGLESS)
                ret=1L;
@@ -363,16 +472,17 @@ void CRYPTO_lock(int mode, int type, const char *file, int line)
 #endif
        if (type < 0)
                {
-               int i = -type - 1;
                struct CRYPTO_dynlock_value *pointer
-                       = CRYPTO_get_dynlock_value(i);
+                       = CRYPTO_get_dynlock_value(type);
 
-               if (pointer)
+               OPENSSL_assert(pointer != NULL);
+
+               if (dynlock_lock_callback)
                        {
-                       dynlock_locking_callback(mode, pointer, file, line);
+                       dynlock_lock_callback(mode, pointer, file, line);
                        }
 
-               CRYPTO_destroy_dynlockid(i);
+               CRYPTO_destroy_dynlockid(type);
                }
        else
                if (locking_callback != NULL)
@@ -398,7 +508,6 @@ int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
                        CRYPTO_get_lock_name(type),
                        file,line);
 #endif
-               *pointer=ret;
                }
        else
                {
@@ -424,14 +533,14 @@ const char *CRYPTO_get_lock_name(int type)
                return("dynamic");
        else if (type < CRYPTO_NUM_LOCKS)
                return(lock_names[type]);
-       else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
+       else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
                return("ERROR");
        else
                return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
        }
 
 #ifdef _DLL
-#ifdef WIN32
+#ifdef OPENSSL_SYS_WIN32
 
 /* All we really need to do is remove the 'error' state when a thread
  * detaches */
@@ -456,3 +565,11 @@ BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 #endif
 
 #endif
+
+void OpenSSLDie(const char *file,int line,const char *assertion)
+       {
+       fprintf(stderr,
+               "%s(%d): OpenSSL internal error, assertion failed: %s\n",
+               file,line,assertion);
+       abort();
+       }