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eck_prn.c

/* crypto/ec/eck_prn.c */
/*
 * Written by Nils Larsch for the OpenSSL project.
 */
/* ====================================================================
 * Copyright (c) 1998-2005 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
 *    openssl-core@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).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * Portions originally developed by SUN MICROSYSTEMS, INC., and 
 * contributed to the OpenSSL project.
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/evp.h>
#include <openssl/ec.h>
#include <openssl/bn.h>

#ifndef OPENSSL_NO_FP_API
int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
      {
      BIO *b;
      int ret;

      if ((b=BIO_new(BIO_s_file())) == NULL)
            {
            ECerr(EC_F_ECPKPARAMETERS_PRINT_FP,ERR_R_BUF_LIB);
            return(0);
            }
      BIO_set_fp(b, fp, BIO_NOCLOSE);
      ret = ECPKParameters_print(b, x, off);
      BIO_free(b);
      return(ret);
      }

00087 int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
      {
      BIO *b;
      int ret;
 
      if ((b=BIO_new(BIO_s_file())) == NULL)
            {
            ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
            return(0);
            }
      BIO_set_fp(b, fp, BIO_NOCLOSE);
      ret = EC_KEY_print(b, x, off);
      BIO_free(b);
      return(ret);
      }

00103 int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
      {
      BIO *b;
      int ret;
 
      if ((b=BIO_new(BIO_s_file())) == NULL)
            {
            ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
            return(0);
            }
      BIO_set_fp(b, fp, BIO_NOCLOSE);
      ret = ECParameters_print(b, x);
      BIO_free(b);
      return(ret);
      }
#endif

00120 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
      {
      EVP_PKEY *pk;
      int ret;
      pk = EVP_PKEY_new();
      if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
            return 0;
      ret = EVP_PKEY_print_private(bp, pk, off, NULL);
      EVP_PKEY_free(pk);
      return ret;
      }

00132 int ECParameters_print(BIO *bp, const EC_KEY *x)
      {
      EVP_PKEY *pk;
      int ret;
      pk = EVP_PKEY_new();
      if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
            return 0;
      ret = EVP_PKEY_print_params(bp, pk, 4, NULL);
      EVP_PKEY_free(pk);
      return ret;
      }

static int print_bin(BIO *fp, const char *str, const unsigned char *num,
            size_t len, int off);

int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
      {
      unsigned char *buffer=NULL;
      size_t      buf_len=0, i;
      int     ret=0, reason=ERR_R_BIO_LIB;
      BN_CTX  *ctx=NULL;
      const EC_POINT *point=NULL;
      BIGNUM      *p=NULL, *a=NULL, *b=NULL, *gen=NULL,
            *order=NULL, *cofactor=NULL;
      const unsigned char *seed;
      size_t      seed_len=0;
      
      static const char *gen_compressed = "Generator (compressed):";
      static const char *gen_uncompressed = "Generator (uncompressed):";
      static const char *gen_hybrid = "Generator (hybrid):";
 
      if (!x)
            {
            reason = ERR_R_PASSED_NULL_PARAMETER;
            goto err;
            }

      ctx = BN_CTX_new();
      if (ctx == NULL)
            {
            reason = ERR_R_MALLOC_FAILURE;
            goto err;
            }

      if (EC_GROUP_get_asn1_flag(x))
            {
            /* the curve parameter are given by an asn1 OID */
            int nid;

            if (!BIO_indent(bp, off, 128))
                  goto err;

            nid = EC_GROUP_get_curve_name(x);
            if (nid == 0)
                  goto err;

            if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
                  goto err;
            if (BIO_printf(bp, "\n") <= 0)
                  goto err;
            }
      else
            {
            /* explicit parameters */
            int is_char_two = 0;
            point_conversion_form_t form;
            int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));

            if (tmp_nid == NID_X9_62_characteristic_two_field)
                  is_char_two = 1;

            if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
                  (b = BN_new()) == NULL || (order = BN_new()) == NULL ||
                  (cofactor = BN_new()) == NULL)
                  {
                  reason = ERR_R_MALLOC_FAILURE;
                  goto err;
                  }

            if (is_char_two)
                  {
                  if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx))
                        {
                        reason = ERR_R_EC_LIB;
                        goto err;
                        }
                  }
            else /* prime field */
                  {
                  if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx))
                        {
                        reason = ERR_R_EC_LIB;
                        goto err;
                        }
                  }

            if ((point = EC_GROUP_get0_generator(x)) == NULL)
                  {
                  reason = ERR_R_EC_LIB;
                  goto err;
                  }
            if (!EC_GROUP_get_order(x, order, NULL) || 
                        !EC_GROUP_get_cofactor(x, cofactor, NULL))
                  {
                  reason = ERR_R_EC_LIB;
                  goto err;
                  }
            
            form = EC_GROUP_get_point_conversion_form(x);

            if ((gen = EC_POINT_point2bn(x, point, 
                        form, NULL, ctx)) == NULL)
                  {
                  reason = ERR_R_EC_LIB;
                  goto err;
                  }

            buf_len = (size_t)BN_num_bytes(p);
            if (buf_len < (i = (size_t)BN_num_bytes(a)))
                  buf_len = i;
            if (buf_len < (i = (size_t)BN_num_bytes(b)))
                  buf_len = i;
            if (buf_len < (i = (size_t)BN_num_bytes(gen)))
                  buf_len = i;
            if (buf_len < (i = (size_t)BN_num_bytes(order)))
                  buf_len = i;
            if (buf_len < (i = (size_t)BN_num_bytes(cofactor))) 
                  buf_len = i;

            if ((seed = EC_GROUP_get0_seed(x)) != NULL)
                  seed_len = EC_GROUP_get_seed_len(x);

            buf_len += 10;
            if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
                  {
                  reason = ERR_R_MALLOC_FAILURE;
                  goto err;
                  }

            if (!BIO_indent(bp, off, 128))
                  goto err;

            /* print the 'short name' of the field type */
            if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
                  <= 0)
                  goto err;  

            if (is_char_two)
                  {
                  /* print the 'short name' of the base type OID */
                  int basis_type = EC_GROUP_get_basis_type(x);
                  if (basis_type == 0)
                        goto err;

                  if (!BIO_indent(bp, off, 128))
                        goto err;

                  if (BIO_printf(bp, "Basis Type: %s\n", 
                        OBJ_nid2sn(basis_type)) <= 0)
                        goto err;

                  /* print the polynomial */
                  if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
                        off))
                        goto err;
                  }
            else
                  {
                  if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer,off))
                        goto err;
                  }
            if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off)) 
                  goto err;
            if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
                  goto err;
            if (form == POINT_CONVERSION_COMPRESSED)
                  {
                  if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
                        buffer, off))
                        goto err;
                  }
            else if (form == POINT_CONVERSION_UNCOMPRESSED)
                  {
                  if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
                        buffer, off))
                        goto err;
                  }
            else /* form == POINT_CONVERSION_HYBRID */
                  {
                  if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
                        buffer, off))
                        goto err;
                  }
            if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order, 
                  buffer, off)) goto err;
            if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor, 
                  buffer, off)) goto err;
            if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
                  goto err;
            }
      ret=1;
err:
      if (!ret)
            ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
      if (p) 
            BN_free(p);
      if (a) 
            BN_free(a);
      if (b)
            BN_free(b);
      if (gen)
            BN_free(gen);
      if (order)
            BN_free(order);
      if (cofactor)
            BN_free(cofactor);
      if (ctx)
            BN_CTX_free(ctx);
      if (buffer != NULL) 
            OPENSSL_free(buffer);
      return(ret);      
      }

static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
            size_t len, int off)
      {
      size_t i;
      char str[128];

      if (buf == NULL)
            return 1;
      if (off)
            {
            if (off > 128)
                  off=128;
            memset(str,' ',off);
            if (BIO_write(fp, str, off) <= 0)
                  return 0;
            }

      if (BIO_printf(fp,"%s", name) <= 0)
            return 0;

      for (i=0; i<len; i++)
            {
            if ((i%15) == 0)
                  {
                  str[0]='\n';
                  memset(&(str[1]),' ',off+4);
                  if (BIO_write(fp, str, off+1+4) <= 0)
                        return 0;
                  }
            if (BIO_printf(fp,"%02x%s",buf[i],((i+1) == len)?"":":") <= 0)
                  return 0;
            }
      if (BIO_write(fp,"\n",1) <= 0)
            return 0;

      return 1;
      }

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