diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/dso/dso_dl.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/dso/dso_dl.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/dso/dso_dl.c b/openssl-1.1.0h/crypto/dso/dso_dl.c new file mode 100644 index 0000000..d80bf56 --- /dev/null +++ b/openssl-1.1.0h/crypto/dso/dso_dl.c @@ -0,0 +1,279 @@ +/* + * 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 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_func, + NULL, /* ctrl */ + dl_name_converter, + dl_merger, + NULL, /* init */ + NULL, /* finish */ + dl_pathbyaddr, + 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 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 */ |