libs/nixio/axTLS/ssl/openssl.c

   1 /*
   2  * Copyright (c) 2007, Cameron Rich
   3  *
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * * Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * * Redistributions in binary form must reproduce the above copyright notice,
  12  *   this list of conditions and the following disclaimer in the documentation
  13  *   and/or other materials provided with the distribution.
  14  * * Neither the name of the axTLS project nor the names of its contributors
  15  *   may be used to endorse or promote products derived from this software
  16  *   without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  22  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * Enable a subset of openssl compatible functions. We don't aim to be 100%
  33  * compatible - just to be able to do basic ports etc.
  34  *
  35  * Only really tested on mini_httpd, so I'm not too sure how extensive this
  36  * port is.
  37  */
  38
  39 #include "config.h"
  40
  41 #ifdef CONFIG_OPENSSL_COMPATIBLE
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <stdarg.h>
  45 #include "ssl.h"
  46
  47 #define OPENSSL_CTX_ATTR  ((OPENSSL_CTX *)ssl_ctx->bonus_attr)
  48
  49 static char *key_password = NULL;
  50
  51 void *SSLv23_server_method(void) { return NULL; }
  52 void *SSLv3_server_method(void) { return NULL; }
  53 void *TLSv1_server_method(void) { return NULL; }
  54 void *SSLv23_client_method(void) { return NULL; }
  55 void *SSLv3_client_method(void) { return NULL; }
  56 void *TLSv1_client_method(void) { return NULL; }
  57
  58 typedef void * (*ssl_func_type_t)(void);
  59 typedef void * (*bio_func_type_t)(void);
  60
  61 typedef struct
  62 {
  63     ssl_func_type_t ssl_func_type;
  64 } OPENSSL_CTX;
  65
  66 SSL_CTX * SSL_CTX_new(ssl_func_type_t meth)
  67 {
  68     SSL_CTX *ssl_ctx = ssl_ctx_new(0, 5);
  69     ssl_ctx->bonus_attr = malloc(sizeof(OPENSSL_CTX));
  70     OPENSSL_CTX_ATTR->ssl_func_type = meth;
  71     return ssl_ctx;
  72 }
  73
  74 void SSL_CTX_free(SSL_CTX * ssl_ctx)
  75 {
  76     free(ssl_ctx->bonus_attr);
  77     ssl_ctx_free(ssl_ctx);
  78 }
  79
  80 SSL * SSL_new(SSL_CTX *ssl_ctx)
  81 {
  82     SSL *ssl;
  83     ssl_func_type_t ssl_func_type;
  84
  85     ssl = ssl_new(ssl_ctx, -1);        /* fd is set later */
  86     ssl_func_type = OPENSSL_CTX_ATTR->ssl_func_type;
  87
  88 #ifdef CONFIG_SSL_ENABLE_CLIENT
  89     if (ssl_func_type == SSLv23_client_method ||
  90         ssl_func_type == SSLv3_client_method ||
  91         ssl_func_type == TLSv1_client_method)
  92     {
  93         SET_SSL_FLAG(SSL_IS_CLIENT);
  94     }
  95     else
  96 #endif
  97     {
  98         ssl->next_state = HS_CLIENT_HELLO;
  99     }
 100
 101     return ssl;
 102 }
 103
 104 int SSL_set_fd(SSL *s, int fd)
 105 {
 106     s->client_fd = fd;
 107     return 1;   /* always succeeds */
 108 }
 109
 110 int SSL_accept(SSL *ssl)
 111 {
 112     while (ssl_read(ssl, NULL) == SSL_OK)
 113     {
 114         if (ssl->next_state == HS_CLIENT_HELLO)
 115             return 1;   /* we're done */
 116     }
 117
 118     return -1;
 119 }
 120
 121 #ifdef CONFIG_SSL_ENABLE_CLIENT
 122 int SSL_connect(SSL *ssl)
 123 {
 124     return do_client_connect(ssl) == SSL_OK ? 1 : -1;
 125 }
 126 #endif
 127
 128 void SSL_free(SSL *ssl)
 129 {
 130     ssl_free(ssl);
 131 }
 132
 133 int SSL_read(SSL *ssl, void *buf, int num)
 134 {
 135     uint8_t *read_buf;
 136     int ret;
 137
 138     while ((ret = ssl_read(ssl, &read_buf)) == SSL_OK);
 139
 140     if (ret > SSL_OK)
 141     {
 142         memcpy(buf, read_buf, ret > num ? num : ret);
 143     }
 144
 145     return ret;
 146 }
 147
 148 int SSL_write(SSL *ssl, const void *buf, int num)
 149 {
 150     return ssl_write(ssl, buf, num);
 151 }
 152
 153 int SSL_CTX_use_certificate_file(SSL_CTX *ssl_ctx, const char *file, int type)
 154 {
 155     return (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, file, NULL) == SSL_OK);
 156 }
 157
 158 int SSL_CTX_use_PrivateKey_file(SSL_CTX *ssl_ctx, const char *file, int type)
 159 {
 160     return (ssl_obj_load(ssl_ctx, SSL_OBJ_RSA_KEY, file, key_password) == SSL_OK);
 161 }
 162
 163 int SSL_CTX_use_certificate_ASN1(SSL_CTX *ssl_ctx, int len, const uint8_t *d)
 164 {
 165     return (ssl_obj_memory_load(ssl_ctx,
 166                         SSL_OBJ_X509_CERT, d, len, NULL) == SSL_OK);
 167 }
 168
 169 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
 170                                             unsigned int sid_ctx_len)
 171 {
 172     return 1;
 173 }
 174
 175 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
 176 {
 177     return 1;
 178 }
 179
 180 int SSL_CTX_use_certificate_chain_file(SSL_CTX *ssl_ctx, const char *file)
 181 {
 182     return (ssl_obj_load(ssl_ctx,
 183                         SSL_OBJ_X509_CERT, file, NULL) == SSL_OK);
 184 }
 185
 186 int SSL_shutdown(SSL *ssl)
 187 {
 188     return 1;
 189 }
 190
 191 /*** get/set session ***/
 192 SSL_SESSION *SSL_get1_session(SSL *ssl)
 193 {
 194     return (SSL_SESSION *)ssl_get_session_id(ssl); /* note: wrong cast */
 195 }
 196
 197 int SSL_set_session(SSL *ssl, SSL_SESSION *session)
 198 {
 199     memcpy(ssl->session_id, (uint8_t *)session, SSL_SESSION_ID_SIZE);
 200     return 1;
 201 }
 202
 203 void SSL_SESSION_free(SSL_SESSION *session) { }
 204 /*** end get/set session ***/
 205
 206 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
 207 {
 208     return 0;
 209 }
 210
 211 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
 212                                  int (*verify_callback)(int, void *)) { }
 213
 214 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth) { }
 215
 216 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
 217                                            const char *CApath)
 218 {
 219     return 1;
 220 }
 221
 222 void *SSL_load_client_CA_file(const char *file)
 223 {
 224     return (void *)file;
 225 }
 226
 227 void SSL_CTX_set_client_CA_list(SSL_CTX *ssl_ctx, void *file)
 228 {
 229
 230     ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, (const char *)file, NULL);
 231 }
 232
 233 void SSLv23_method(void) { }
 234
 235 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, void *cb) { }
 236
 237 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
 238 {
 239     key_password = (char *)u;
 240 }
 241
 242 int SSL_peek(SSL *ssl, void *buf, int num)
 243 {
 244     memcpy(buf, ssl->bm_data, num);
 245     return num;
 246 }
 247
 248 void SSL_set_bio(SSL *ssl, void *rbio, void *wbio) { }
 249
 250 long SSL_get_verify_result(const SSL *ssl)
 251 {
 252     return ssl_handshake_status(ssl);
 253 }
 254
 255 int SSL_state(SSL *ssl)
 256 {
 257     return 0x03; // ok state
 258 }
 259
 260 /** end of could do better list */
 261
 262 void *SSL_get_peer_certificate(const SSL *ssl)
 263 {
 264     return &ssl->ssl_ctx->certs[0];
 265 }
 266
 267 int SSL_clear(SSL *ssl)
 268 {
 269     return 1;
 270 }
 271
 272
 273 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 274 {
 275     return 1;
 276 }
 277
 278 int SSL_CTX_set_cipher_list(SSL *s, const char *str)
 279 {
 280     return 1;
 281 }
 282
 283 int SSL_get_error(const SSL *ssl, int ret)
 284 {
 285     ssl_display_error(ret);
 286     return 0;   /* TODO: return proper return code */
 287 }
 288
 289 void SSL_CTX_set_options(SSL_CTX *ssl_ctx, int option) {}
 290 int SSL_library_init(void ) { return 1; }
 291 void SSL_load_error_strings(void ) {}
 292 void ERR_print_errors_fp(FILE *fp) {}
 293
 294 #ifndef CONFIG_SSL_SKELETON_MODE
 295 long SSL_CTX_get_timeout(const SSL_CTX *ssl_ctx) {
 296                             return CONFIG_SSL_EXPIRY_TIME*3600; }
 297 long SSL_CTX_set_timeout(SSL_CTX *ssl_ctx, long t) {
 298                             return SSL_CTX_get_timeout(ssl_ctx); }
 299 #endif
 300 void BIO_printf(FILE *f, const char *format, ...)
 301 {
 302     va_list(ap);
 303     va_start(ap, format);
 304     vfprintf(f, format, ap);
 305     va_end(ap);
 306 }
 307
 308 void* BIO_s_null(void) { return NULL; }
 309 FILE *BIO_new(bio_func_type_t func)
 310 {
 311     if (func == BIO_s_null)
 312         return fopen("/dev/null", "r");
 313     else
 314         return NULL;
 315 }
 316
 317 FILE *BIO_new_fp(FILE *stream, int close_flag) { return stream; }
 318 int BIO_free(FILE *a) { if (a != stdout && a != stderr) fclose(a); return 1; }
 319
 320
 321
 322 #endif