diff options
Diffstat (limited to 'openssl/crypto/dso/dso_dlfcn.c')
| -rw-r--r-- | openssl/crypto/dso/dso_dlfcn.c | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/openssl/crypto/dso/dso_dlfcn.c b/openssl/crypto/dso/dso_dlfcn.c new file mode 100644 index 00000000..c2bc6176 --- /dev/null +++ b/openssl/crypto/dso/dso_dlfcn.c @@ -0,0 +1,483 @@ +/* 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). + * + */ + +/* We need to do this early, because stdio.h includes the header files + that handle _GNU_SOURCE and other similar macros. Defining it later + is simply too late, because those headers are protected from re- + inclusion. */ +#ifdef __linux +# ifndef _GNU_SOURCE +# define _GNU_SOURCE /* make sure dladdr is declared */ +# endif +#endif + +#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 +# ifdef __osf__ +# define __EXTENSIONS__ +# endif +# include <dlfcn.h> +# define HAVE_DLINFO 1 +# if defined(_AIX) || defined(__CYGWIN__) || \ + defined(__SCO_VERSION__) || defined(_SCO_ELF) || \ + (defined(__osf__) && !defined(RTLD_NEXT)) || \ + (defined(__OpenBSD__) && !defined(RTLD_SELF)) +# undef HAVE_DLINFO +# endif +#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 int dlfcn_pathbyaddr(void *addr,char *path,int sz); +static void *dlfcn_globallookup(const char *name); + +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 */ + dlfcn_pathbyaddr, + dlfcn_globallookup + }; + +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_void_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_void_num(dso->meth_data) < 1) + return(1); + ptr = sk_void_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_void_push(dso->meth_data, 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_void_num(dso->meth_data) < 1) + { + DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR); + return(NULL); + } + ptr = sk_void_value(dso->meth_data, sk_void_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; + union { + DSO_FUNC_TYPE sym; + void *dlret; + } u; + + if((dso == NULL) || (symname == NULL)) + { + DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER); + return(NULL); + } + if(sk_void_num(dso->meth_data) < 1) + { + DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR); + return(NULL); + } + ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); + if(ptr == NULL) + { + DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE); + return(NULL); + } + u.dlret = dlsym(ptr, symname); + if(u.dlret == NULL) + { + DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE); + ERR_add_error_data(4, "symname(", symname, "): ", dlerror()); + return(NULL); + } + return u.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 != NULL && 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 = strlen(filespec2); + 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); + } + +#ifdef OPENSSL_SYS_MACOSX +#define DSO_ext ".dylib" +#define DSO_extlen 6 +#else +#define DSO_ext ".so" +#define DSO_extlen 3 +#endif + + +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" etc */ + rsize += DSO_extlen; /* 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) + sprintf(translated, "lib%s" DSO_ext, filename); + else + sprintf(translated, "%s" DSO_ext, filename); + } + else + sprintf(translated, "%s", filename); + return(translated); + } + +#ifdef __sgi +/* +This is a quote from IRIX manual for dladdr(3c): + + <dlfcn.h> does not contain a prototype for dladdr or definition of + Dl_info. The #include <dlfcn.h> in the SYNOPSIS line is traditional, + but contains no dladdr prototype and no IRIX library contains an + implementation. Write your own declaration based on the code below. + + The following code is dependent on internal interfaces that are not + part of the IRIX compatibility guarantee; however, there is no future + intention to change this interface, so on a practical level, the code + below is safe to use on IRIX. +*/ +#include <rld_interface.h> +#ifndef _RLD_INTERFACE_DLFCN_H_DLADDR +#define _RLD_INTERFACE_DLFCN_H_DLADDR +typedef struct Dl_info { + const char * dli_fname; + void * dli_fbase; + const char * dli_sname; + void * dli_saddr; + int dli_version; + int dli_reserved1; + long dli_reserved[4]; +} Dl_info; +#else +typedef struct Dl_info Dl_info; +#endif +#define _RLD_DLADDR 14 + +static int dladdr(void *address, Dl_info *dl) +{ + void *v; + v = _rld_new_interface(_RLD_DLADDR,address,dl); + return (int)v; +} +#endif /* __sgi */ + +static int dlfcn_pathbyaddr(void *addr,char *path,int sz) + { +#ifdef HAVE_DLINFO + Dl_info dli; + int len; + + if (addr == NULL) + { + union { int(*f)(void*,char*,int); void *p; } t = + { dlfcn_pathbyaddr }; + addr = t.p; + } + + if (dladdr(addr,&dli)) + { + len = (int)strlen(dli.dli_fname); + if (sz <= 0) return len+1; + if (len >= sz) len=sz-1; + memcpy(path,dli.dli_fname,len); + path[len++]=0; + return len; + } + + ERR_add_error_data(4, "dlfcn_pathbyaddr(): ", dlerror()); +#endif + return -1; + } + +static void *dlfcn_globallookup(const char *name) + { + void *ret = NULL,*handle = dlopen(NULL,RTLD_LAZY); + + if (handle) + { + ret = dlsym(handle,name); + dlclose(handle); + } + + return ret; + } +#endif /* DSO_DLFCN */ |