text: /*
   * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
   *
   * Permission is hereby granted, free of charge, to any person obtaining 
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be 
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #include "brssl.h"
  
  /* see brssl.h */
  void *
  xmalloc(size_t len)
  {
  	void *buf;
  
  	if (len == 0) {
  		return NULL;
  	}
  	buf = malloc(len);
  	if (buf == NULL) {
  		fprintf(stderr, "ERROR: could not allocate %lu byte(s)\n",
  			(unsigned long)len);
  		exit(EXIT_FAILURE);
  	}
  	return buf;
  }
  
  /* see brssl.h */
  void
  xfree(void *buf)
  {
  	if (buf != NULL) {
  		free(buf);
  	}
  }
  
  /* see brssl.h */
  void *
  xblobdup(const void *src, size_t len)
  {
  	void *buf;
  
  	buf = xmalloc(len);
  	memcpy(buf, src, len);
  	return buf;
  }
  
  /* see brssl.h */
  char *
  xstrdup(const void *src)
  {
  	return xblobdup(src, strlen(src) + 1);
  }
  
  /* see brssl.h */
  br_x509_pkey *
  xpkeydup(const br_x509_pkey *pk)
  {
  	br_x509_pkey *pk2;
  
  	pk2 = xmalloc(sizeof *pk2);
  	pk2->key_type = pk->key_type;
  	switch (pk->key_type) {
  	case BR_KEYTYPE_RSA:
  		pk2->key.rsa.n = xblobdup(pk->key.rsa.n, pk->key.rsa.nlen);
  		pk2->key.rsa.nlen = pk->key.rsa.nlen;
  		pk2->key.rsa.e = xblobdup(pk->key.rsa.e, pk->key.rsa.elen);
  		pk2->key.rsa.elen = pk->key.rsa.elen;
  		break;
  	case BR_KEYTYPE_EC:
  		pk2->key.ec.curve = pk->key.ec.curve;
  		pk2->key.ec.q = xblobdup(pk->key.ec.q, pk->key.ec.qlen);
  		pk2->key.ec.qlen = pk->key.ec.qlen;
  		break;
  	default:
  		fprintf(stderr, "Unknown public key type: %u\n",
  			(unsigned)pk->key_type);
  		exit(EXIT_FAILURE);
  	}
  	return pk2;
  }
  
  /* see brssl.h */
  void
  xfreepkey(br_x509_pkey *pk)
  {
  	if (pk != NULL) {
  		switch (pk->key_type) {
  		case BR_KEYTYPE_RSA:
  			xfree(pk->key.rsa.n);
  			xfree(pk->key.rsa.e);
  			break;
  		case BR_KEYTYPE_EC:
  			xfree(pk->key.ec.q);
  			break;
  		default:
  			fprintf(stderr, "Unknown public key type: %u\n",
  				(unsigned)pk->key_type);
  			exit(EXIT_FAILURE);
  		}
  		xfree(pk);
  	}
  }
  