text: /* $OpenBSD: x509spki.c,v 1.14 2019/05/23 02:08:34 bcook Exp $ */
  /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   * project 1999.
   */
  /* ====================================================================
   * Copyright (c) 1999 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 <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include <openssl/err.h>
  #include <openssl/x509.h>
  
  int
  NETSCAPE_SPKI_set_pubkey(NETSCAPE_SPKI *x, EVP_PKEY *pkey)
  {
  	if ((x == NULL) || (x->spkac == NULL))
  		return (0);
  	return (X509_PUBKEY_set(&(x->spkac->pubkey), pkey));
  }
  
  EVP_PKEY *
  NETSCAPE_SPKI_get_pubkey(NETSCAPE_SPKI *x)
  {
  	if ((x == NULL) || (x->spkac == NULL))
  		return (NULL);
  	return (X509_PUBKEY_get(x->spkac->pubkey));
  }
  
  /* Load a Netscape SPKI from a base64 encoded string */
  
  NETSCAPE_SPKI *
  NETSCAPE_SPKI_b64_decode(const char *str, int len)
  {
  	unsigned char *spki_der;
  	const unsigned char *p;
  	int spki_len;
  	NETSCAPE_SPKI *spki;
  
  	if (len <= 0)
  		len = strlen(str);
  	if (!(spki_der = malloc(len + 1))) {
  		X509error(ERR_R_MALLOC_FAILURE);
  		return NULL;
  	}
  	spki_len = EVP_DecodeBlock(spki_der, (const unsigned char *)str, len);
  	if (spki_len < 0) {
  		X509error(X509_R_BASE64_DECODE_ERROR);
  		free(spki_der);
  		return NULL;
  	}
  	p = spki_der;
  	spki = d2i_NETSCAPE_SPKI(NULL, &p, spki_len);
  	free(spki_der);
  	return spki;
  }
  
  /* Generate a base64 encoded string from an SPKI */
  
  char *
  NETSCAPE_SPKI_b64_encode(NETSCAPE_SPKI *spki)
  {
  	unsigned char *der_spki, *p;
  	char *b64_str;
  	int der_len;
  	der_len = i2d_NETSCAPE_SPKI(spki, NULL);
  	der_spki = malloc(der_len);
  	b64_str = reallocarray(NULL, der_len, 2);
  	if (!der_spki || !b64_str) {
  		X509error(ERR_R_MALLOC_FAILURE);
  		free(der_spki);
  		free(b64_str);
  		return NULL;
  	}
  	p = der_spki;
  	i2d_NETSCAPE_SPKI(spki, &p);
  	EVP_EncodeBlock((unsigned char *)b64_str, der_spki, der_len);
  	free(der_spki);
  	return b64_str;
  }
  