# $Id$ import os def run(func, arg, *cmd): i, o = func(cmd) i.write(arg) i.close() value = o.read() o.close() return value def encode(xml, cer, key): return run(os.popen2, xml, "openssl", "smime", "-sign", "-nodetach", "-outform", "PEM", "-signer", cer, "-inkey", key) def decode(cms, dir): return run(os.popen2, cms, "openssl", "smime", "-verify", "-inform", "PEM", "-CApath", dir) def relaxng(xml, rng): return run(os.popen4, xml, "xmllint", "--noout", "--relaxng", rng, "-") def main(): dir = "biz-certs" cer = "biz-certs/Alice-EE.cer" key = "biz-certs/Alice-EE.key" rng = "up-down-medium-schema.rng" for x in xml: print x e = encode(x, cer, key) print e d = decode(e, dir) print d v = relaxng(d, rng) print v print "=====\n" # Ugly inline stuff here for initial testing xml = [ ''' 2001 17 [Readable text] ''', ''' deadbeef ''', ''' deadbeef deadbeef ''', ''' ''', ''' deadbeef deadbeef ''', ''' ''', ''' ''' ] main() 6' href='#n36'>36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
/* crypto/engine/eng_ctrl.c */
/* ====================================================================
 * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    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
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include "eng_int.h"

/* When querying a ENGINE-specific control command's 'description', this string
 * is used if the ENGINE_CMD_DEFN has cmd_desc set to NULL. */
static const char *int_no_description = "";

/* These internal functions handle 'CMD'-related control commands when the
 * ENGINE in question has asked us to take care of it (ie. the ENGINE did not
 * set the ENGINE_FLAGS_MANUAL_CMD_CTRL flag. */

static int int_ctrl_cmd_is_null(const ENGINE_CMD_DEFN *defn)
	{
	if((defn->cmd_num == 0) || (defn->cmd_name == NULL))
		return 1;
	return 0;
	}

static int int_ctrl_cmd_by_name(const ENGINE_CMD_DEFN *defn, const char *s)
	{
	int idx = 0;
	while(!int_ctrl_cmd_is_null(defn) && (strcmp(defn->cmd_name, s) != 0))
		{
		idx++;
		defn++;
		}
	if(int_ctrl_cmd_is_null(defn))
		/* The given name wasn't found */
		return -1;
	return idx;
	}

static int int_ctrl_cmd_by_num(const ENGINE_CMD_DEFN *defn, unsigned int num)
	{
	int idx = 0;
	/* NB: It is stipulated that 'cmd_defn' lists are ordered by cmd_num. So
	 * our searches don't need to take any longer than necessary. */
	while(!int_ctrl_cmd_is_null(defn) && (defn->cmd_num < num))
		{
		idx++;
		defn++;
		}
	if(defn->cmd_num == num)
		return idx;
	/* The given cmd_num wasn't found */
	return -1;
	}

static int int_ctrl_helper(ENGINE *e, int cmd, long i, void *p,
			   void (*f)(void))
	{
	int idx;
	char *s = (char *)p;
	/* Take care of the easy one first (eg. it requires no searches) */
	if(cmd == ENGINE_CTRL_GET_FIRST_CMD_TYPE)
		{
		if((e->cmd_defns == NULL) || int_ctrl_cmd_is_null(e->cmd_defns))
			return 0;
		return e->cmd_defns->cmd_num;
		}
	/* One or two commands require that "p" be a valid string buffer */
	if((cmd == ENGINE_CTRL_GET_CMD_FROM_NAME) ||
			(cmd == ENGINE_CTRL_GET_NAME_FROM_CMD) ||
			(cmd == ENGINE_CTRL_GET_DESC_FROM_CMD))
		{
		if(s == NULL)
			{
			ENGINEerr(ENGINE_F_INT_CTRL_HELPER,
				ERR_R_PASSED_NULL_PARAMETER);
			return -1;
			}
		}
	/* Now handle cmd_name -> cmd_num conversion */
	if(cmd == ENGINE_CTRL_GET_CMD_FROM_NAME)
		{
		if((e->cmd_defns == NULL) || ((idx = int_ctrl_cmd_by_name(
						e->cmd_defns, s)) < 0))
			{
			ENGINEerr(ENGINE_F_INT_CTRL_HELPER,
				ENGINE_R_INVALID_CMD_NAME);
			return -1;
			}
		return e->cmd_defns[idx].cmd_num;
		}
	/* For the rest of the commands, the 'long' argument must specify a
	 * valie command number - so we need to conduct a search. */
	if((e->cmd_defns == NULL) || ((idx = int_ctrl_cmd_by_num(e->cmd_defns,
					(unsigned int)i)) < 0))
		{
		ENGINEerr(ENGINE_F_INT_CTRL_HELPER,
			ENGINE_R_INVALID_CMD_NUMBER);
		return -1;
		}
	/* Now the logic splits depending on command type */
	switch(cmd)
		{
	case ENGINE_CTRL_GET_NEXT_CMD_TYPE:
		idx++;
		if(int_ctrl_cmd_is_null(e->cmd_defns + idx))
			/* end-of-list */
			return 0;
		else
			return e->cmd_defns[idx].cmd_num;
	case ENGINE_CTRL_GET_NAME_LEN_FROM_CMD:
		return strlen(e->cmd_defns[idx].cmd_name);
	case ENGINE_CTRL_GET_NAME_FROM_CMD:
		return BIO_snprintf(s,strlen(e->cmd_defns[idx].cmd_name) + 1,
				    "%s", e->cmd_defns[idx].cmd_name);
	case ENGINE_CTRL_GET_DESC_LEN_FROM_CMD:
		if(e->cmd_defns[idx].cmd_desc)
			return strlen(e->cmd_defns[idx].cmd_desc);
		return strlen(int_no_description);
	case ENGINE_CTRL_GET_DESC_FROM_CMD:
		if(e->cmd_defns[idx].cmd_desc)
			return BIO_snprintf(s,
					    strlen(e->cmd_defns[idx].cmd_desc) + 1,
					    "%s", e->cmd_defns[idx].cmd_desc);
		return BIO_snprintf(s, strlen(int_no_description) + 1,"%s",
				    int_no_description);
	case ENGINE_CTRL_GET_CMD_FLAGS:
		return e->cmd_defns[idx].cmd_flags;
		}
	/* Shouldn't really be here ... */
	ENGINEerr(ENGINE_F_INT_CTRL_HELPER,ENGINE_R_INTERNAL_LIST_ERROR);
	return -1;
	}

int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
	{
	int ctrl_exists, ref_exists;
	if(e == NULL)
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL,ERR_R_PASSED_NULL_PARAMETER);
		return 0;
		}
	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	ref_exists = ((e->struct_ref > 0) ? 1 : 0);
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	ctrl_exists = ((e->ctrl == NULL) ? 0 : 1);
	if(!ref_exists)
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_REFERENCE);
		return 0;
		}
	/* Intercept any "root-level" commands before trying to hand them on to
	 * ctrl() handlers. */
	switch(cmd)
		{
	case ENGINE_CTRL_HAS_CTRL_FUNCTION:
		return ctrl_exists;
	case ENGINE_CTRL_GET_FIRST_CMD_TYPE:
	case ENGINE_CTRL_GET_NEXT_CMD_TYPE:
	case ENGINE_CTRL_GET_CMD_FROM_NAME:
	case ENGINE_CTRL_GET_NAME_LEN_FROM_CMD:
	case ENGINE_CTRL_GET_NAME_FROM_CMD:
	case ENGINE_CTRL_GET_DESC_LEN_FROM_CMD:
	case ENGINE_CTRL_GET_DESC_FROM_CMD:
	case ENGINE_CTRL_GET_CMD_FLAGS:
		if(ctrl_exists && !(e->flags & ENGINE_FLAGS_MANUAL_CMD_CTRL))
			return int_ctrl_helper(e,cmd,i,p,f);
		if(!ctrl_exists)
			{
			ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_CONTROL_FUNCTION);
			/* For these cmd-related functions, failure is indicated
			 * by a -1 return value (because 0 is used as a valid
			 * return in some places). */
			return -1;
			}
	default:
		break;
		}
	/* Anything else requires a ctrl() handler to exist. */
	if(!ctrl_exists)
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_CONTROL_FUNCTION);
		return 0;
		}
	return e->ctrl(e, cmd, i, p, f);
	}

int ENGINE_cmd_is_executable(ENGINE *e, int cmd)
	{
	int flags;
	if((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, cmd, NULL, NULL)) < 0)
		{
		ENGINEerr(ENGINE_F_ENGINE_CMD_IS_EXECUTABLE,
			ENGINE_R_INVALID_CMD_NUMBER);
		return 0;
		}
	if(!(flags & ENGINE_CMD_FLAG_NO_INPUT) &&
			!(flags & ENGINE_CMD_FLAG_NUMERIC) &&
			!(flags & ENGINE_CMD_FLAG_STRING))
		return 0;
	return 1;
	}

int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name,
        long i, void *p, void (*f)(void), int cmd_optional)
        {
	int num;

	if((e == NULL) || (cmd_name == NULL))
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD,
			ERR_R_PASSED_NULL_PARAMETER);
		return 0;
		}
	if((e->ctrl == NULL) || ((num = ENGINE_ctrl(e,
					ENGINE_CTRL_GET_CMD_FROM_NAME,
					0, (void *)cmd_name, NULL)) <= 0))
		{
		/* If the command didn't *have* to be supported, we fake
		 * success. This allows certain settings to be specified for
		 * multiple ENGINEs and only require a change of ENGINE id
		 * (without having to selectively apply settings). Eg. changing
		 * from a hardware device back to the regular software ENGINE
		 * without editing the config file, etc. */
		if(cmd_optional)
			{
			ERR_clear_error();
			return 1;
			}
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD,
			ENGINE_R_INVALID_CMD_NAME);
		return 0;
		}
	/* Force the result of the control command to 0 or 1, for the reasons
	 * mentioned before. */
        if (ENGINE_ctrl(e, num, i, p, f))
                return 1;
        return 0;
        }

int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
				int cmd_optional)
	{
	int num, flags;
	long l;
	char *ptr;
	if((e == NULL) || (cmd_name == NULL))
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ERR_R_PASSED_NULL_PARAMETER);
		return 0;
		}
	if((e->ctrl == NULL) || ((num = ENGINE_ctrl(e,
					ENGINE_CTRL_GET_CMD_FROM_NAME,
					0, (void *)cmd_name, NULL)) <= 0))
		{
		/* If the command didn't *have* to be supported, we fake
		 * success. This allows certain settings to be specified for
		 * multiple ENGINEs and only require a change of ENGINE id
		 * (without having to selectively apply settings). Eg. changing
		 * from a hardware device back to the regular software ENGINE
		 * without editing the config file, etc. */
		if(cmd_optional)
			{
			ERR_clear_error();
			return 1;
			}
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ENGINE_R_INVALID_CMD_NAME);
		return 0;
		}
	if(!ENGINE_cmd_is_executable(e, num))
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ENGINE_R_CMD_NOT_EXECUTABLE);
		return 0;
		}
	if((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num, NULL, NULL)) < 0)
		{
		/* Shouldn't happen, given that ENGINE_cmd_is_executable()
		 * returned success. */
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ENGINE_R_INTERNAL_LIST_ERROR);
		return 0;
		}
	/* If the command takes no input, there must be no input. And vice
	 * versa. */
	if(flags & ENGINE_CMD_FLAG_NO_INPUT)
		{
		if(arg != NULL)
			{
			ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
				ENGINE_R_COMMAND_TAKES_NO_INPUT);
			return 0;
			}
		/* We deliberately force the result of ENGINE_ctrl() to 0 or 1
		 * rather than returning it as "return data". This is to ensure
		 * usage of these commands is consistent across applications and
		 * that certain applications don't understand it one way, and
		 * others another. */
		if(ENGINE_ctrl(e, num, 0, (void *)arg, NULL))
			return 1;
		return 0;
		}
	/* So, we require input */
	if(arg == NULL)
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ENGINE_R_COMMAND_TAKES_INPUT);
		return 0;
		}
	/* If it takes string input, that's easy */
	if(flags & ENGINE_CMD_FLAG_STRING)
		{
		/* Same explanation as above */
		if(ENGINE_ctrl(e, num, 0, (void *)arg, NULL))
			return 1;
		return 0;
		}
	/* If it doesn't take numeric either, then it is unsupported for use in
	 * a config-setting situation, which is what this function is for. This
	 * should never happen though, because ENGINE_cmd_is_executable() was
	 * used. */
	if(!(flags & ENGINE_CMD_FLAG_NUMERIC))
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ENGINE_R_INTERNAL_LIST_ERROR);
		return 0;
		}
	l = strtol(arg, &ptr, 10);
	if((arg == ptr) || (*ptr != '\0'))
		{
		ENGINEerr(ENGINE_F_ENGINE_CTRL_CMD_STRING,
			ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER);
		return 0;
		}
	/* Force the result of the control command to 0 or 1, for the reasons
	 * mentioned before. */
	if(ENGINE_ctrl(e, num, l, NULL, NULL))
		return 1;
	return 0;
	}