1 files changed, 276 insertions, 0 deletions

diff --git a/src/lib/libcrypto/dso/dso_dlfcn.c b/src/lib/libcrypto/dso/dso_dlfcn.c
new file mode 100644
index 0000000000..e709c721cc
--- /dev/null
+++ b/src/lib/libcrypto/dso/dso_dlfcn.c
@@ -0,0 +1,276 @@
+/* dso_dlfcn.c */
+/* 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).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/dso.h>
+
+#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, const char *filename);
+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);
+#endif
+static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
+
+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
+        dlfcn_ctrl,
+        NULL, /* init */
+        NULL  /* finish */
+        };
+
+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. */
+#ifdef __OpenBSD__
+#       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
+#       define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
+#endif
+
+/* For this DSO_METHOD, our meth_data STACK will contain;
+ * (i) the handle (void*) returned from dlopen().
+ */
+
+static int dlfcn_load(DSO *dso, const char *filename)
+        {
+        void *ptr;
+        char translated[DSO_MAX_TRANSLATED_SIZE];
+        int len;
+
+        /* NB: This is a hideous hack, but I'm not yet sure what
+         * to replace it with. This attempts to convert any filename,
+         * that looks like it has no path information, into a
+         * translated form, e. "blah" -> "libblah.so" */
+        len = strlen(filename);
+        if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
+                        (len + 6 < DSO_MAX_TRANSLATED_SIZE) &&
+                        (strstr(filename, "/") == NULL))
+                {
+                sprintf(translated, "lib%s.so", filename);
+                ptr = dlopen(translated, DLOPEN_FLAG);
+                }
+        else
+                {
+                ptr = dlopen(filename, DLOPEN_FLAG);
+                }
+        if(ptr == NULL)
+                {
+                DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
+                return(0);
+                }
+        if(!sk_push(dso->meth_data, (char *)ptr))
+                {
+                DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
+                dlclose(ptr);
+                return(0);
+                }
+        return(1);
+        }
+
+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);
+                return(NULL);
+                }
+        return(sym);
+        }
+
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
+        {
+        void *ptr;
+        DSO_FUNC_TYPE 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);
+                }
+        sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
+        if(sym == NULL)
+                {
+                DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
+                return(NULL);
+                }
+        return(sym);
+        }
+
+static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg)
+        {
+        if(dso == NULL)
+                {
+                DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER);
+                return(-1);
+                }
+        switch(cmd)
+                {
+        case DSO_CTRL_GET_FLAGS:
+                return dso->flags;
+        case DSO_CTRL_SET_FLAGS:
+                dso->flags = (int)larg;
+                return(0);
+        case DSO_CTRL_OR_FLAGS:
+                dso->flags |= (int)larg;
+                return(0);
+        default:
+                break;
+                }
+        DSOerr(DSO_F_DLFCN_CTRL,DSO_R_UNKNOWN_COMMAND);
+        return(-1);
+        }
+
+#endif /* DSO_DLFCN */