-/* dso_dl.c */
-/* Written by Richard Levitte (levitte@openssl.org) for the OpenSSL
- * project 2000.
+/*
+ * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
+ * 2000.
*/
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
*/
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/dso.h>
+#include "internal/dso_conf.h"
#ifndef DSO_DL
DSO_METHOD *DSO_METHOD_dl(void)
- {
- return NULL;
- }
+{
+ return NULL;
+}
#else
-#include <dl.h>
/* Part of the hack in "dl_load" ... */
-#define DSO_MAX_TRANSLATED_SIZE 256
+# define DSO_MAX_TRANSLATED_SIZE 256
-static int dl_load(DSO *dso, const char *filename);
+static int dl_load(DSO *dso);
static int dl_unload(DSO *dso);
static void *dl_bind_var(DSO *dso, const char *symname);
static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
-#if 0
-static int dl_unbind_var(DSO *dso, char *symname, void *symptr);
-static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
-static int dl_init(DSO *dso);
-static int dl_finish(DSO *dso);
-#endif
-static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
+static char *dl_name_converter(DSO *dso, const char *filename);
+static char *dl_merger(DSO *dso, const char *filespec1,
+ const char *filespec2);
+static int dl_pathbyaddr(void *addr, char *path, int sz);
+static void *dl_globallookup(const char *name);
static DSO_METHOD dso_meth_dl = {
- "OpenSSL 'dl' shared library method",
- dl_load,
- dl_unload,
- dl_bind_var,
- dl_bind_func,
-/* For now, "unbind" doesn't exist */
-#if 0
- NULL, /* unbind_var */
- NULL, /* unbind_func */
-#endif
- dl_ctrl,
- NULL, /* init */
- NULL /* finish */
- };
+ "OpenSSL 'dl' shared library method",
+ dl_load,
+ dl_unload,
+ dl_bind_var,
+ dl_bind_func,
+ NULL, /* ctrl */
+ dl_name_converter,
+ dl_merger,
+ NULL, /* init */
+ NULL, /* finish */
+ dl_pathbyaddr,
+ dl_globallookup
+};
DSO_METHOD *DSO_METHOD_dl(void)
- {
- return(&dso_meth_dl);
- }
-
-/* For this DSO_METHOD, our meth_data STACK will contain;
- * (i) the handle (shl_t) returned from shl_load().
- * NB: I checked on HPUX11 and shl_t is itself a pointer
- * type so the cast is safe.
+{
+ return (&dso_meth_dl);
+}
+
+/*
+ * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
+ * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
+ * itself a pointer type so the cast is safe.
*/
-static int dl_load(DSO *dso, const char *filename)
- {
- shl_t ptr;
- char translated[DSO_MAX_TRANSLATED_SIZE];
- int len;
-
- /* The same comment as in dlfcn_load applies here. bleurgh. */
- 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 = shl_load(translated, BIND_IMMEDIATE, NULL);
- }
- else
- ptr = shl_load(filename, BIND_IMMEDIATE, NULL);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
- return(0);
- }
- if(!sk_push(dso->meth_data, (char *)ptr))
- {
- DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
- shl_unload(ptr);
- return(0);
- }
- return(1);
- }
+static int dl_load(DSO *dso)
+{
+ shl_t ptr = NULL;
+ /*
+ * We don't do any fancy retries or anything, just take the method's (or
+ * DSO's if it has the callback set) best translation of the
+ * platform-independent filename and try once with that.
+ */
+ char *filename = DSO_convert_filename(dso, NULL);
+
+ if (filename == NULL) {
+ DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME);
+ goto err;
+ }
+ ptr = shl_load(filename, BIND_IMMEDIATE |
+ (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 :
+ DYNAMIC_PATH), 0L);
+ if (ptr == NULL) {
+ DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED);
+ ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno));
+ goto err;
+ }
+ if (!sk_push(dso->meth_data, (char *)ptr)) {
+ DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR);
+ goto err;
+ }
+ /*
+ * Success, stick the converted filename we've loaded under into the DSO
+ * (it also serves as the indicator that we are currently loaded).
+ */
+ dso->loaded_filename = filename;
+ return (1);
+ err:
+ /* Cleanup! */
+ OPENSSL_free(filename);
+ if (ptr != NULL)
+ shl_unload(ptr);
+ return (0);
+}
static int dl_unload(DSO *dso)
- {
- shl_t ptr;
- if(dso == NULL)
- {
- DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
- return(0);
- }
- if(sk_num(dso->meth_data) < 1)
- return(1);
- /* Is this statement legal? */
- ptr = (shl_t)sk_pop(dso->meth_data);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DL_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);
- }
- shl_unload(ptr);
- return(1);
- }
+{
+ shl_t ptr;
+ if (dso == NULL) {
+ DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
+ return (0);
+ }
+ if (sk_num(dso->meth_data) < 1)
+ return (1);
+ /* Is this statement legal? */
+ ptr = (shl_t) sk_pop(dso->meth_data);
+ if (ptr == NULL) {
+ DSOerr(DSO_F_DL_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);
+ }
+ shl_unload(ptr);
+ return (1);
+}
static void *dl_bind_var(DSO *dso, const char *symname)
- {
- shl_t ptr;
- void *sym;
-
- if((dso == NULL) || (symname == NULL))
- {
- DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
- return(NULL);
- }
- if(sk_num(dso->meth_data) < 1)
- {
- DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
- return(NULL);
- }
- ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
- return(NULL);
- }
- if (shl_findsym(ptr, symname, TYPE_UNDEFINED, &sym) < 0)
- {
- DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
- return(NULL);
- }
- return(sym);
- }
+{
+ shl_t ptr;
+ void *sym;
+
+ if ((dso == NULL) || (symname == NULL)) {
+ DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
+ return (NULL);
+ }
+ if (sk_num(dso->meth_data) < 1) {
+ DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR);
+ return (NULL);
+ }
+ ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
+ if (ptr == NULL) {
+ DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE);
+ return (NULL);
+ }
+ if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
+ DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE);
+ ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
+ return (NULL);
+ }
+ return (sym);
+}
static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
- {
- shl_t ptr;
- void *sym;
-
- if((dso == NULL) || (symname == NULL))
- {
- DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
- return(NULL);
- }
- if(sk_num(dso->meth_data) < 1)
- {
- DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
- return(NULL);
- }
- ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
- return(NULL);
- }
- if (shl_findsym(ptr, symname, TYPE_UNDEFINED, &sym) < 0)
- {
- DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
- return(NULL);
- }
- return((DSO_FUNC_TYPE)sym);
- }
-
-static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg)
- {
- if(dso == NULL)
- {
- DSOerr(DSO_F_DL_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_DL_CTRL,DSO_R_UNKNOWN_COMMAND);
- return(-1);
- }
-
-#endif /* DSO_DL */
+{
+ shl_t ptr;
+ void *sym;
+
+ if ((dso == NULL) || (symname == NULL)) {
+ DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
+ return (NULL);
+ }
+ if (sk_num(dso->meth_data) < 1) {
+ DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR);
+ return (NULL);
+ }
+ ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
+ if (ptr == NULL) {
+ DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE);
+ return (NULL);
+ }
+ if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
+ DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE);
+ ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
+ return (NULL);
+ }
+ return ((DSO_FUNC_TYPE)sym);
+}
+
+static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
+{
+ char *merged;
+
+ if (!filespec1 && !filespec2) {
+ DSOerr(DSO_F_DL_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_strdup(filespec1);
+ if (merged == NULL) {
+ DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ }
+ /*
+ * If the first file specification is missing, the second one rules.
+ */
+ else if (!filespec1) {
+ merged = OPENSSL_strdup(filespec2);
+ if (merged == NULL) {
+ DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ } 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 (spec2len && filespec2[spec2len - 1] == '/') {
+ spec2len--;
+ len--;
+ }
+ merged = OPENSSL_malloc(len + 2);
+ if (merged == NULL) {
+ DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ strcpy(merged, filespec2);
+ merged[spec2len] = '/';
+ strcpy(&merged[spec2len + 1], filespec1);
+ }
+ return (merged);
+}
+
+/*
+ * This function is identical to the one in dso_dlfcn.c, but as it is highly
+ * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
+ * the same time, there's no great duplicating the code. Figuring out an
+ * elegant way to share one copy of the code would be more difficult and
+ * would not leave the implementations independent.
+ */
+static char *dl_name_converter(DSO *dso, const char *filename)
+{
+ char *translated;
+ int len, rsize, transform;
+
+ len = strlen(filename);
+ rsize = len + 1;
+ transform = (strstr(filename, "/") == NULL);
+ {
+ /* We will convert this to "%s.s?" or "lib%s.s?" */
+ rsize += strlen(DSO_EXTENSION); /* The length of ".s?" */
+ 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_DL_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%s", filename, DSO_EXTENSION);
+ else
+ sprintf(translated, "%s%s", filename, DSO_EXTENSION);
+ } else
+ sprintf(translated, "%s", filename);
+ return (translated);
+}
+
+static int dl_pathbyaddr(void *addr, char *path, int sz)
+{
+ struct shl_descriptor inf;
+ int i, len;
+
+ if (addr == NULL) {
+ union {
+ int (*f) (void *, char *, int);
+ void *p;
+ } t = {
+ dl_pathbyaddr
+ };
+ addr = t.p;
+ }
+
+ for (i = -1; shl_get_r(i, &inf) == 0; i++) {
+ if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
+ ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) {
+ len = (int)strlen(inf.filename);
+ if (sz <= 0)
+ return len + 1;
+ if (len >= sz)
+ len = sz - 1;
+ memcpy(path, inf.filename, len);
+ path[len++] = 0;
+ return len;
+ }
+ }
+
+ return -1;
+}
+
+static void *dl_globallookup(const char *name)
+{
+ void *ret;
+ shl_t h = NULL;
+
+ return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret;
+}
+#endif /* DSO_DL */
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