crypto/ec/eck_prn.c - third_party/openssl - Git at Google

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

 #ifndef OPENSSL_NO_STDIO
 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);
 }

 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);
 }

 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

 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;
 }

 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;
         const char *nname;

         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;
         nname = EC_curve_nid2nist(nid);
         if (nname) {
             if (!BIO_indent(bp, off, 128))
                 goto err;
             if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 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;
         }
 #ifndef OPENSSL_NO_EC2M
         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 */
 #endif
         {
             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);
     BN_free(p);
     BN_free(a);
     BN_free(b);
     BN_free(gen);
     BN_free(order);
     BN_free(cofactor);
     BN_CTX_free(ctx);
     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 > 0) {
         if (off > 128)
             off = 128;
         memset(str, ' ', off);
         if (BIO_write(fp, str, off) <= 0)
             return 0;
     } else {
         off = 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;
 }
	/* 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 "internal/cryptlib.h"
	#include <openssl/evp.h>
	#include <openssl/ec.h>
	#include <openssl/bn.h>

	#ifndef OPENSSL_NO_STDIO
	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);
	}

	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);
	}

	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

	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;
	}

	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;
	const char *nname;

	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;
	nname = EC_curve_nid2nist(nid);
	if (nname) {
	if (!BIO_indent(bp, off, 128))
	goto err;
	if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 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;
	}
	#ifndef OPENSSL_NO_EC2M
	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 */
	#endif
	{
	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);
	BN_free(p);
	BN_free(a);
	BN_free(b);
	BN_free(gen);
	BN_free(order);
	BN_free(cofactor);
	BN_CTX_free(ctx);
	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 > 0) {
	if (off > 128)
	off = 128;
	memset(str, ' ', off);
	if (BIO_write(fp, str, off) <= 0)
	return 0;
	} else {
	off = 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;
	}