| /* |
| * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include "dso_locl.h" |
| |
| #ifdef DSO_DL |
| |
| # include <dl.h> |
| |
| /* Part of the hack in "dl_load" ... */ |
| # define DSO_MAX_TRANSLATED_SIZE 256 |
| |
| static int dl_load(DSO *dso); |
| static int dl_unload(DSO *dso); |
| static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname); |
| static char *dl_name_converter(DSO *dso, const char *filename); |
| static char *dl_merger(DSO *dso, const char *filespec1, |
| const char *filespec2); |
| static void *dl_globallookup(const char *name); |
| |
| static DSO_METHOD dso_meth_dl = { |
| "OpenSSL 'dl' shared library method", |
| dl_load, |
| dl_unload, |
| dl_bind_func, |
| NULL, /* ctrl */ |
| dl_name_converter, |
| dl_merger, |
| NULL, /* init */ |
| NULL, /* finish */ |
| dl_globallookup |
| }; |
| |
| DSO_METHOD *DSO_METHOD_openssl(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. |
| */ |
| |
| 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) { |
| char errbuf[160]; |
| DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED); |
| if (openssl_strerror_r(errno, errbuf, sizeof(errbuf))) |
| ERR_add_error_data(4, "filename(", filename, "): ", errbuf); |
| 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); |
| } |
| |
| 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) { |
| char errbuf[160]; |
| DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE); |
| if (openssl_strerror_r(errno, errbuf, sizeof(errbuf))) |
| ERR_add_error_data(4, "symname(", symname, "): ", errbuf); |
| 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 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 */ |
