--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/dso/dso_dlfcn.c	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,416 @@
+/* dso_dlfcn.c -*- mode:C; c-file-style: "eay" -*- */
+/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 2000 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
+ *    licensing@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).
+ *
+ */
+ /*
+ © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
+ */
+
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/dso.h>
+#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
+#include "libcrypto_wsd_macros.h"
+#include "libcrypto_wsd.h"
+#endif
+
+#ifndef DSO_DLFCN
+DSO_METHOD *DSO_METHOD_dlfcn(void)
+	{
+	return NULL;
+	}
+	
+#else
+
+#ifdef HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+/* Part of the hack in "dlfcn_load" ... */
+#define DSO_MAX_TRANSLATED_SIZE 256
+
+static int dlfcn_load(DSO *dso);
+static int dlfcn_unload(DSO *dso);
+static void *dlfcn_bind_var(DSO *dso, const char *symname);
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
+#if 0
+static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
+static int dlfcn_init(DSO *dso);
+static int dlfcn_finish(DSO *dso);
+static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
+#endif
+static char *dlfcn_name_converter(DSO *dso, const char *filename);
+static char *dlfcn_merger(DSO *dso, const char *filespec1,
+	const char *filespec2);
+
+#ifndef EMULATOR
+static DSO_METHOD dso_meth_dlfcn = {
+	"OpenSSL 'dlfcn' shared library method",
+	dlfcn_load,
+	dlfcn_unload,
+	dlfcn_bind_var,
+	dlfcn_bind_func,
+/* For now, "unbind" doesn't exist */
+#if 0
+	NULL, /* unbind_var */
+	NULL, /* unbind_func */
+#endif
+	NULL, /* ctrl */
+	dlfcn_name_converter,
+	dlfcn_merger,
+	NULL, /* init */
+	NULL  /* finish */
+	};
+#else
+GET_STATIC_VAR_FROM_TLS(dso_meth_dlfcn,dso_dlfcn,DSO_METHOD)
+#define dso_meth_dlfcn (*GET_WSD_VAR_NAME(dso_meth_dlfcn,dso_dlfcn, s)())
+const DSO_METHOD temp_s_dso_meth_dlfcn = {
+	"OpenSSL 'dlfcn' shared library method",
+	dlfcn_load,
+	dlfcn_unload,
+	dlfcn_bind_var,
+	dlfcn_bind_func,
+/* For now, "unbind" doesn't exist */
+#if 0
+	NULL, /* unbind_var */
+	NULL, /* unbind_func */
+#endif
+	NULL, /* ctrl */
+	dlfcn_name_converter,
+	dlfcn_merger,
+	NULL, /* init */
+	NULL  /* finish */
+	};
+
+#endif
+EXPORT_C DSO_METHOD *DSO_METHOD_dlfcn(void)
+	{
+	return(&dso_meth_dlfcn);
+	}
+
+/* Prior to using the dlopen() function, we should decide on the flag
+ * we send. There's a few different ways of doing this and it's a
+ * messy venn-diagram to match up which platforms support what. So
+ * as we don't have autoconf yet, I'm implementing a hack that could
+ * be hacked further relatively easily to deal with cases as we find
+ * them. Initially this is to cope with OpenBSD. */
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+#	ifdef DL_LAZY
+#		define DLOPEN_FLAG DL_LAZY
+#	else
+#		ifdef RTLD_NOW
+#			define DLOPEN_FLAG RTLD_NOW
+#		else
+#			define DLOPEN_FLAG 0
+#		endif
+#	endif
+#else
+#	ifdef OPENSSL_SYS_SUNOS
+#		define DLOPEN_FLAG 1
+#	else
+#		define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
+#	endif
+#endif
+
+/* For this DSO_METHOD, our meth_data STACK will contain;
+ * (i) the handle (void*) returned from dlopen().
+ */
+
+static int dlfcn_load(DSO *dso)
+	{
+	void *ptr = NULL;
+	/* See applicable comments in dso_dl.c */
+	char *filename = DSO_convert_filename(dso, NULL);
+	int flags = DLOPEN_FLAG;
+
+	if(filename == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_LOAD,DSO_R_NO_FILENAME);
+		goto err;
+		}
+
+#ifdef RTLD_GLOBAL
+	if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
+		flags |= RTLD_GLOBAL;
+#endif
+	ptr = dlopen(filename, flags);
+	if(ptr == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
+		ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
+		goto err;
+		}
+	if(!sk_push(dso->meth_data, (char *)ptr))
+		{
+		DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
+		goto err;
+		}
+	/* Success */
+	dso->loaded_filename = filename;
+	return(1);
+err:
+	/* Cleanup! */
+	if(filename != NULL)
+		OPENSSL_free(filename);
+	if(ptr != NULL)
+		dlclose(ptr);
+	return(0);
+}
+
+static int dlfcn_unload(DSO *dso)
+	{
+	void *ptr;
+	if(dso == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
+		return(0);
+		}
+	if(sk_num(dso->meth_data) < 1)
+		return(1);
+	ptr = (void *)sk_pop(dso->meth_data);
+	if(ptr == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_NULL_HANDLE);
+		/* Should push the value back onto the stack in
+		 * case of a retry. */
+		sk_push(dso->meth_data, (char *)ptr);
+		return(0);
+		}
+	/* For now I'm not aware of any errors associated with dlclose() */
+	dlclose(ptr);
+	return(1);
+	}
+
+static void *dlfcn_bind_var(DSO *dso, const char *symname)
+	{
+	void *ptr, *sym;
+
+	if((dso == NULL) || (symname == NULL))
+		{
+		DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
+		return(NULL);
+		}
+	if(sk_num(dso->meth_data) < 1)
+		{
+		DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
+		return(NULL);
+		}
+	ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
+	if(ptr == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
+		return(NULL);
+		}
+	sym = dlsym(ptr, symname);
+	if(sym == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
+		ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+		return(NULL);
+		}
+	return(sym);
+	}
+
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
+	{
+	void *ptr;
+	DSO_FUNC_TYPE sym, *tsym = &sym;
+
+	if((dso == NULL) || (symname == NULL))
+		{
+		DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
+		return(NULL);
+		}
+	if(sk_num(dso->meth_data) < 1)
+		{
+		DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
+		return(NULL);
+		}
+	ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
+	if(ptr == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
+		return(NULL);
+		}
+	*(void **)(tsym) = dlsym(ptr, symname);
+	if(sym == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
+		ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+		return(NULL);
+		}
+	return(sym);
+	}
+
+static char *dlfcn_merger(DSO *dso, const char *filespec1,
+	const char *filespec2)
+	{
+	char *merged;
+
+	if(!filespec1 && !filespec2)
+		{
+		DSOerr(DSO_F_DLFCN_MERGER,
+				ERR_R_PASSED_NULL_PARAMETER);
+		return(NULL);
+		}
+	/* If the first file specification is a rooted path, it rules.
+	   same goes if the second file specification is missing. */
+	if (!filespec2 || filespec1[0] == '/')
+		{
+		merged = OPENSSL_malloc(strlen(filespec1) + 1);
+		if(!merged)
+			{
+			DSOerr(DSO_F_DLFCN_MERGER,
+				ERR_R_MALLOC_FAILURE);
+			return(NULL);
+			}
+		strcpy(merged, filespec1);
+		}
+	/* If the first file specification is missing, the second one rules. */
+	else if (!filespec1)
+		{
+		merged = OPENSSL_malloc(strlen(filespec2) + 1);
+		if(!merged)
+			{
+			DSOerr(DSO_F_DLFCN_MERGER,
+				ERR_R_MALLOC_FAILURE);
+			return(NULL);
+			}
+		strcpy(merged, filespec2);
+		}
+	else
+		/* This part isn't as trivial as it looks.  It assumes that
+		   the second file specification really is a directory, and
+		   makes no checks whatsoever.  Therefore, the result becomes
+		   the concatenation of filespec2 followed by a slash followed
+		   by filespec1. */
+		{
+		int spec2len, len;
+
+		spec2len = (filespec2 ? strlen(filespec2) : 0);
+		len = spec2len + (filespec1 ? strlen(filespec1) : 0);
+
+		if(filespec2 && filespec2[spec2len - 1] == '/')
+			{
+			spec2len--;
+			len--;
+			}
+		merged = OPENSSL_malloc(len + 2);
+		if(!merged)
+			{
+			DSOerr(DSO_F_DLFCN_MERGER,
+				ERR_R_MALLOC_FAILURE);
+			return(NULL);
+			}
+		strcpy(merged, filespec2);
+		merged[spec2len] = '/';
+		strcpy(&merged[spec2len + 1], filespec1);
+		}
+	return(merged);
+	}
+
+static char *dlfcn_name_converter(DSO *dso, const char *filename)
+	{
+	char *translated;
+	int len, rsize, transform;
+
+	len = strlen(filename);
+	rsize = len + 1;
+	transform = (strstr(filename, "/") == NULL);
+	if(transform)
+		{
+#ifndef SYMBIAN		
+		/* We will convert this to "%s.so" or "lib%s.so" */
+		rsize += 3;	/* The length of ".so" */
+		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+			rsize += 3; /* The length of "lib" */
+#else
+	/* We will convert this to "%s.dll" or "lib%s.dll" */
+		rsize += 4;	/* The length of ".dll" */
+		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+			rsize += 3; /* The length of "lib" */
+#endif			
+		}
+	translated = OPENSSL_malloc(rsize);
+	if(translated == NULL)
+		{
+		DSOerr(DSO_F_DLFCN_NAME_CONVERTER,
+				DSO_R_NAME_TRANSLATION_FAILED);
+		return(NULL);
+		}
+	if(transform)
+		{
+#ifndef SYMBIAN		
+		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+			sprintf(translated, "lib%s.so", filename);
+		else
+			sprintf(translated, "%s.so", filename);
+#else
+		if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+			sprintf(translated, "lib%s.dll", filename);
+		else
+			sprintf(translated, "%s.dll", filename);
+
+#endif		
+		
+		}
+	else
+		sprintf(translated, "%s", filename);
+	return(translated);
+	}
+
+#endif /* DSO_DLFCN */