| 1 | /*
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| 2 | * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <string.h>
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| 12 | #include <stdlib.h>
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| 13 | #include <openssl/opensslv.h>
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| 14 | #include <openssl/ssl.h>
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| 15 | #include <openssl/types.h>
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| 16 | #include "simpledynamic.h"
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| 17 |
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| 18 | typedef void DSO;
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| 19 |
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| 20 | typedef const SSL_METHOD * (*TLS_method_t)(void);
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| 21 | typedef SSL_CTX * (*SSL_CTX_new_t)(const SSL_METHOD *meth);
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| 22 | typedef void (*SSL_CTX_free_t)(SSL_CTX *);
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| 23 | typedef int (*OPENSSL_init_crypto_t)(uint64_t, void *);
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| 24 | typedef int (*OPENSSL_atexit_t)(void (*handler)(void));
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| 25 | typedef unsigned long (*ERR_get_error_t)(void);
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| 26 | typedef unsigned long (*OPENSSL_version_major_t)(void);
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| 27 | typedef unsigned long (*OPENSSL_version_minor_t)(void);
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| 28 | typedef unsigned long (*OPENSSL_version_patch_t)(void);
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| 29 | typedef DSO * (*DSO_dsobyaddr_t)(void (*addr)(void), int flags);
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| 30 | typedef int (*DSO_free_t)(DSO *dso);
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| 31 |
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| 32 | typedef enum test_types_en {
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| 33 | CRYPTO_FIRST,
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| 34 | SSL_FIRST,
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| 35 | JUST_CRYPTO,
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| 36 | DSO_REFTEST,
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| 37 | NO_ATEXIT
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| 38 | } TEST_TYPE;
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| 39 |
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| 40 | static TEST_TYPE test_type;
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| 41 | static const char *path_crypto;
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| 42 | static const char *path_ssl;
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| 43 | static const char *path_atexit;
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| 44 |
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| 45 | #ifdef SD_INIT
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| 46 |
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| 47 | static int atexit_handler_done = 0;
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| 48 |
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| 49 | static void atexit_handler(void)
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| 50 | {
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| 51 | FILE *atexit_file = fopen(path_atexit, "w");
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| 52 |
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| 53 | if (atexit_file == NULL)
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| 54 | return;
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| 55 |
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| 56 | fprintf(atexit_file, "atexit() run\n");
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| 57 | fclose(atexit_file);
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| 58 | atexit_handler_done++;
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| 59 | }
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| 60 |
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| 61 | static int test_lib(void)
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| 62 | {
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| 63 | SD ssllib = SD_INIT;
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| 64 | SD cryptolib = SD_INIT;
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| 65 | SSL_CTX *ctx;
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| 66 | union {
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| 67 | void (*func)(void);
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| 68 | SD_SYM sym;
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| 69 | } symbols[5];
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| 70 | TLS_method_t myTLS_method;
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| 71 | SSL_CTX_new_t mySSL_CTX_new;
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| 72 | SSL_CTX_free_t mySSL_CTX_free;
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| 73 | ERR_get_error_t myERR_get_error;
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| 74 | OPENSSL_version_major_t myOPENSSL_version_major;
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| 75 | OPENSSL_version_minor_t myOPENSSL_version_minor;
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| 76 | OPENSSL_version_patch_t myOPENSSL_version_patch;
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| 77 | OPENSSL_atexit_t myOPENSSL_atexit;
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| 78 | int result = 0;
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| 79 |
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| 80 | switch (test_type) {
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| 81 | case JUST_CRYPTO:
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| 82 | case DSO_REFTEST:
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| 83 | case NO_ATEXIT:
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| 84 | case CRYPTO_FIRST:
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| 85 | if (!sd_load(path_crypto, &cryptolib, SD_SHLIB)) {
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| 86 | fprintf(stderr, "Failed to load libcrypto\n");
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| 87 | goto end;
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| 88 | }
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| 89 | if (test_type != CRYPTO_FIRST)
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| 90 | break;
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| 91 | /* Fall through */
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| 92 |
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| 93 | case SSL_FIRST:
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| 94 | if (!sd_load(path_ssl, &ssllib, SD_SHLIB)) {
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| 95 | fprintf(stderr, "Failed to load libssl\n");
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| 96 | goto end;
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| 97 | }
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| 98 | if (test_type != SSL_FIRST)
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| 99 | break;
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| 100 | if (!sd_load(path_crypto, &cryptolib, SD_SHLIB)) {
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| 101 | fprintf(stderr, "Failed to load libcrypto\n");
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| 102 | goto end;
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| 103 | }
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| 104 | break;
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| 105 | }
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| 106 |
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| 107 | if (test_type == NO_ATEXIT) {
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| 108 | OPENSSL_init_crypto_t myOPENSSL_init_crypto;
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| 109 |
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| 110 | if (!sd_sym(cryptolib, "OPENSSL_init_crypto", &symbols[0].sym)) {
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| 111 | fprintf(stderr, "Failed to load OPENSSL_init_crypto symbol\n");
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| 112 | goto end;
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| 113 | }
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| 114 | myOPENSSL_init_crypto = (OPENSSL_init_crypto_t)symbols[0].func;
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| 115 | if (!myOPENSSL_init_crypto(OPENSSL_INIT_NO_ATEXIT, NULL)) {
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| 116 | fprintf(stderr, "Failed to initialise libcrypto\n");
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| 117 | goto end;
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| 118 | }
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| 119 | }
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| 120 |
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| 121 | if (test_type != JUST_CRYPTO
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| 122 | && test_type != DSO_REFTEST
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| 123 | && test_type != NO_ATEXIT) {
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| 124 | if (!sd_sym(ssllib, "TLS_method", &symbols[0].sym)
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| 125 | || !sd_sym(ssllib, "SSL_CTX_new", &symbols[1].sym)
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| 126 | || !sd_sym(ssllib, "SSL_CTX_free", &symbols[2].sym)) {
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| 127 | fprintf(stderr, "Failed to load libssl symbols\n");
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| 128 | goto end;
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| 129 | }
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| 130 | myTLS_method = (TLS_method_t)symbols[0].func;
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| 131 | mySSL_CTX_new = (SSL_CTX_new_t)symbols[1].func;
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| 132 | mySSL_CTX_free = (SSL_CTX_free_t)symbols[2].func;
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| 133 | ctx = mySSL_CTX_new(myTLS_method());
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| 134 | if (ctx == NULL) {
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| 135 | fprintf(stderr, "Failed to create SSL_CTX\n");
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| 136 | goto end;
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| 137 | }
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| 138 | mySSL_CTX_free(ctx);
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| 139 | }
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| 140 |
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| 141 | if (!sd_sym(cryptolib, "ERR_get_error", &symbols[0].sym)
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| 142 | || !sd_sym(cryptolib, "OPENSSL_version_major", &symbols[1].sym)
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| 143 | || !sd_sym(cryptolib, "OPENSSL_version_minor", &symbols[2].sym)
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| 144 | || !sd_sym(cryptolib, "OPENSSL_version_patch", &symbols[3].sym)
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| 145 | || !sd_sym(cryptolib, "OPENSSL_atexit", &symbols[4].sym)) {
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| 146 | fprintf(stderr, "Failed to load libcrypto symbols\n");
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| 147 | goto end;
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| 148 | }
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| 149 | myERR_get_error = (ERR_get_error_t)symbols[0].func;
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| 150 | if (myERR_get_error() != 0) {
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| 151 | fprintf(stderr, "Unexpected ERR_get_error() response\n");
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| 152 | goto end;
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| 153 | }
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| 154 |
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| 155 | /* Library and header version should be identical in this test */
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| 156 | myOPENSSL_version_major = (OPENSSL_version_major_t)symbols[1].func;
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| 157 | myOPENSSL_version_minor = (OPENSSL_version_minor_t)symbols[2].func;
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| 158 | myOPENSSL_version_patch = (OPENSSL_version_patch_t)symbols[3].func;
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| 159 | if (myOPENSSL_version_major() != OPENSSL_VERSION_MAJOR
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| 160 | || myOPENSSL_version_minor() != OPENSSL_VERSION_MINOR
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| 161 | || myOPENSSL_version_patch() != OPENSSL_VERSION_PATCH) {
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| 162 | fprintf(stderr, "Invalid library version number\n");
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| 163 | goto end;
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| 164 | }
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| 165 |
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| 166 | myOPENSSL_atexit = (OPENSSL_atexit_t)symbols[4].func;
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| 167 | if (!myOPENSSL_atexit(atexit_handler)) {
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| 168 | fprintf(stderr, "Failed to register atexit handler\n");
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| 169 | goto end;
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| 170 | }
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| 171 |
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| 172 | if (test_type == DSO_REFTEST) {
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| 173 | # ifdef DSO_DLFCN
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| 174 | DSO_dsobyaddr_t myDSO_dsobyaddr;
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| 175 | DSO_free_t myDSO_free;
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| 176 |
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| 177 | /*
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| 178 | * This is resembling the code used in ossl_init_base() and
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| 179 | * OPENSSL_atexit() to block unloading the library after dlclose().
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| 180 | * We are not testing this on Windows, because it is done there in a
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| 181 | * completely different way. Especially as a call to DSO_dsobyaddr()
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| 182 | * will always return an error, because DSO_pathbyaddr() is not
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| 183 | * implemented there.
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| 184 | */
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| 185 | if (!sd_sym(cryptolib, "DSO_dsobyaddr", &symbols[0].sym)
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| 186 | || !sd_sym(cryptolib, "DSO_free", &symbols[1].sym)) {
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| 187 | fprintf(stderr, "Unable to load DSO symbols\n");
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| 188 | goto end;
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| 189 | }
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| 190 |
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| 191 | myDSO_dsobyaddr = (DSO_dsobyaddr_t)symbols[0].func;
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| 192 | myDSO_free = (DSO_free_t)symbols[1].func;
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| 193 |
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| 194 | {
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| 195 | DSO *hndl;
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| 196 | /* use known symbol from crypto module */
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| 197 | hndl = myDSO_dsobyaddr((void (*)(void))myERR_get_error, 0);
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| 198 | if (hndl == NULL) {
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| 199 | fprintf(stderr, "DSO_dsobyaddr() failed\n");
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| 200 | goto end;
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| 201 | }
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| 202 | myDSO_free(hndl);
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| 203 | }
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| 204 | # endif /* DSO_DLFCN */
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| 205 | }
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| 206 |
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| 207 | if (!sd_close(cryptolib)) {
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| 208 | fprintf(stderr, "Failed to close libcrypto\n");
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| 209 | goto end;
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| 210 | }
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| 211 | cryptolib = SD_INIT;
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| 212 |
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| 213 | if (test_type == CRYPTO_FIRST || test_type == SSL_FIRST) {
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| 214 | if (!sd_close(ssllib)) {
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| 215 | fprintf(stderr, "Failed to close libssl\n");
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| 216 | goto end;
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| 217 | }
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| 218 | ssllib = SD_INIT;
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| 219 | }
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| 220 |
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| 221 | # if defined(OPENSSL_NO_PINSHARED) \
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| 222 | && defined(__GLIBC__) \
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| 223 | && defined(__GLIBC_PREREQ) \
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| 224 | && defined(OPENSSL_SYS_LINUX)
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| 225 | # if __GLIBC_PREREQ(2, 3)
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| 226 | /*
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| 227 | * If we didn't pin the so then we are hopefully on a platform that supports
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| 228 | * running atexit() on so unload. If not we might crash. We know this is
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| 229 | * true on linux since glibc 2.2.3
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| 230 | */
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| 231 | if (test_type != NO_ATEXIT && atexit_handler_done != 1) {
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| 232 | fprintf(stderr, "atexit() handler did not run\n");
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| 233 | goto end;
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| 234 | }
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| 235 | # endif
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| 236 | # endif
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| 237 |
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| 238 | result = 1;
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| 239 | end:
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| 240 | if (cryptolib != SD_INIT)
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| 241 | sd_close(cryptolib);
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| 242 | if (ssllib != SD_INIT)
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| 243 | sd_close(ssllib);
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| 244 | return result;
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| 245 | }
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| 246 | #endif
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| 247 |
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| 248 |
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| 249 | /*
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| 250 | * shlibloadtest should not use the normal test framework because we don't want
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| 251 | * it to link against libcrypto (which the framework uses). The point of the
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| 252 | * test is to check dynamic loading and unloading of libcrypto/libssl.
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| 253 | */
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| 254 | int main(int argc, char *argv[])
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| 255 | {
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| 256 | const char *p;
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| 257 |
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| 258 | if (argc != 5) {
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| 259 | fprintf(stderr, "Incorrect number of arguments\n");
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| 260 | return 1;
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| 261 | }
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| 262 |
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| 263 | p = argv[1];
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| 264 |
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| 265 | if (strcmp(p, "-crypto_first") == 0) {
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| 266 | test_type = CRYPTO_FIRST;
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| 267 | } else if (strcmp(p, "-ssl_first") == 0) {
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| 268 | test_type = SSL_FIRST;
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| 269 | } else if (strcmp(p, "-just_crypto") == 0) {
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| 270 | test_type = JUST_CRYPTO;
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| 271 | } else if (strcmp(p, "-dso_ref") == 0) {
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| 272 | test_type = DSO_REFTEST;
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| 273 | } else if (strcmp(p, "-no_atexit") == 0) {
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| 274 | test_type = NO_ATEXIT;
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| 275 | } else {
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| 276 | fprintf(stderr, "Unrecognised argument\n");
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| 277 | return 1;
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| 278 | }
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| 279 | path_crypto = argv[2];
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| 280 | path_ssl = argv[3];
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| 281 | path_atexit = argv[4];
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| 282 | if (path_crypto == NULL || path_ssl == NULL) {
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| 283 | fprintf(stderr, "Invalid libcrypto/libssl path\n");
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| 284 | return 1;
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| 285 | }
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| 286 |
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| 287 | #ifdef SD_INIT
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| 288 | if (!test_lib())
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| 289 | return 1;
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| 290 | #endif
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| 291 | return 0;
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| 292 | }
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