1 files changed, 372 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..656cd496f8
--- /dev/null
+++ b/src/lib/libcrypto/dso/dso_dlfcn.c
@@ -0,0 +1,372 @@
+/* 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).
+ *
+ */
+
+#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);
+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);
+
+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 */
+        };
+
+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;
+        size_t len;
+
+        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] == '/')
+                {
+                len = strlen(filespec1) + 1;
+                merged = OPENSSL_malloc(len);
+                if(!merged)
+                        {
+                        DSOerr(DSO_F_DLFCN_MERGER,
+                                ERR_R_MALLOC_FAILURE);
+                        return(NULL);
+                        }
+                strlcpy(merged, filespec1, len);
+                }
+        /* If the first file specification is missing, the second one rules. */
+        else if (!filespec1)
+                {
+                len = strlen(filespec2) + 1;
+                merged = OPENSSL_malloc(strlen(filespec2) + 1);
+                if(!merged)
+                        {
+                        DSOerr(DSO_F_DLFCN_MERGER,
+                                ERR_R_MALLOC_FAILURE);
+                        return(NULL);
+                        }
+                strlcpy(merged, filespec2, len);
+                }
+        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);
+                        }
+                strlcpy(merged, filespec2, len + 2);
+                merged[spec2len] = '/';
+                strlcpy(&merged[spec2len + 1], filespec1, len + 1 - spec2len);
+                }
+        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)
+                {
+                /* 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" */
+                }
+        translated = OPENSSL_malloc(rsize);
+        if(translated == NULL)
+                {
+                DSOerr(DSO_F_DLFCN_NAME_CONVERTER,
+                                DSO_R_NAME_TRANSLATION_FAILED);
+                return(NULL);
+                }
+        if(transform)
+                {
+                if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+                        snprintf(translated, rsize, "lib%s.so", filename);
+                else
+                        snprintf(translated, rsize, "%s.so", filename);
+                }
+        else
+                snprintf(translated, rsize, "%s", filename);
+        return(translated);
+        }
+
+#endif /* DSO_DLFCN */