eck_prn.c revision 392aa7cc7d2b122614c5393c3e357da07fd07af3 
1/* crypto/ec/eck_prn.c */
2/*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
5/* ====================================================================
6 * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    openssl-core@openssl.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58/* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * Portions originally developed by SUN MICROSYSTEMS, INC., and
61 * contributed to the OpenSSL project.
62 */
63
64#include <stdio.h>
65#include "cryptlib.h"
66#include <openssl/evp.h>
67#include <openssl/ec.h>
68#include <openssl/bn.h>
69
70#ifndef OPENSSL_NO_FP_API
71int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
72	{
73	BIO *b;
74	int ret;
75
76	if ((b=BIO_new(BIO_s_file())) == NULL)
77		{
78		ECerr(EC_F_ECPKPARAMETERS_PRINT_FP,ERR_R_BUF_LIB);
79		return(0);
80		}
81	BIO_set_fp(b, fp, BIO_NOCLOSE);
82	ret = ECPKParameters_print(b, x, off);
83	BIO_free(b);
84	return(ret);
85	}
86
87int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
88	{
89	BIO *b;
90	int ret;
91
92	if ((b=BIO_new(BIO_s_file())) == NULL)
93		{
94		ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
95		return(0);
96		}
97	BIO_set_fp(b, fp, BIO_NOCLOSE);
98	ret = EC_KEY_print(b, x, off);
99	BIO_free(b);
100	return(ret);
101	}
102
103int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
104	{
105	BIO *b;
106	int ret;
107
108	if ((b=BIO_new(BIO_s_file())) == NULL)
109		{
110		ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
111		return(0);
112		}
113	BIO_set_fp(b, fp, BIO_NOCLOSE);
114	ret = ECParameters_print(b, x);
115	BIO_free(b);
116	return(ret);
117	}
118#endif
119
120int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
121	{
122	EVP_PKEY *pk;
123	int ret;
124	pk = EVP_PKEY_new();
125	if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
126		return 0;
127	ret = EVP_PKEY_print_private(bp, pk, off, NULL);
128	EVP_PKEY_free(pk);
129	return ret;
130	}
131
132int ECParameters_print(BIO *bp, const EC_KEY *x)
133	{
134	EVP_PKEY *pk;
135	int ret;
136	pk = EVP_PKEY_new();
137	if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
138		return 0;
139	ret = EVP_PKEY_print_params(bp, pk, 4, NULL);
140	EVP_PKEY_free(pk);
141	return ret;
142	}
143
144static int print_bin(BIO *fp, const char *str, const unsigned char *num,
145		size_t len, int off);
146
147int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
148	{
149	unsigned char *buffer=NULL;
150	size_t	buf_len=0, i;
151	int     ret=0, reason=ERR_R_BIO_LIB;
152	BN_CTX  *ctx=NULL;
153	const EC_POINT *point=NULL;
154	BIGNUM	*p=NULL, *a=NULL, *b=NULL, *gen=NULL,
155		*order=NULL, *cofactor=NULL;
156	const unsigned char *seed;
157	size_t	seed_len=0;
158
159	static const char *gen_compressed = "Generator (compressed):";
160	static const char *gen_uncompressed = "Generator (uncompressed):";
161	static const char *gen_hybrid = "Generator (hybrid):";
162
163	if (!x)
164		{
165		reason = ERR_R_PASSED_NULL_PARAMETER;
166		goto err;
167		}
168
169	ctx = BN_CTX_new();
170	if (ctx == NULL)
171		{
172		reason = ERR_R_MALLOC_FAILURE;
173		goto err;
174		}
175
176	if (EC_GROUP_get_asn1_flag(x))
177		{
178		/* the curve parameter are given by an asn1 OID */
179		int nid;
180
181		if (!BIO_indent(bp, off, 128))
182			goto err;
183
184		nid = EC_GROUP_get_curve_name(x);
185		if (nid == 0)
186			goto err;
187
188		if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
189			goto err;
190		if (BIO_printf(bp, "\n") <= 0)
191			goto err;
192		}
193	else
194		{
195		/* explicit parameters */
196		int is_char_two = 0;
197		point_conversion_form_t form;
198		int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
199
200		if (tmp_nid == NID_X9_62_characteristic_two_field)
201			is_char_two = 1;
202
203		if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
204			(b = BN_new()) == NULL || (order = BN_new()) == NULL ||
205			(cofactor = BN_new()) == NULL)
206			{
207			reason = ERR_R_MALLOC_FAILURE;
208			goto err;
209			}
210#ifndef OPENSSL_NO_EC2M
211		if (is_char_two)
212			{
213			if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx))
214				{
215				reason = ERR_R_EC_LIB;
216				goto err;
217				}
218			}
219		else /* prime field */
220#endif
221			{
222			if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx))
223				{
224				reason = ERR_R_EC_LIB;
225				goto err;
226				}
227			}
228
229		if ((point = EC_GROUP_get0_generator(x)) == NULL)
230			{
231			reason = ERR_R_EC_LIB;
232			goto err;
233			}
234		if (!EC_GROUP_get_order(x, order, NULL) ||
235            		!EC_GROUP_get_cofactor(x, cofactor, NULL))
236			{
237			reason = ERR_R_EC_LIB;
238			goto err;
239			}
240
241		form = EC_GROUP_get_point_conversion_form(x);
242
243		if ((gen = EC_POINT_point2bn(x, point,
244				form, NULL, ctx)) == NULL)
245			{
246			reason = ERR_R_EC_LIB;
247			goto err;
248			}
249
250		buf_len = (size_t)BN_num_bytes(p);
251		if (buf_len < (i = (size_t)BN_num_bytes(a)))
252			buf_len = i;
253		if (buf_len < (i = (size_t)BN_num_bytes(b)))
254			buf_len = i;
255		if (buf_len < (i = (size_t)BN_num_bytes(gen)))
256			buf_len = i;
257		if (buf_len < (i = (size_t)BN_num_bytes(order)))
258			buf_len = i;
259		if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
260			buf_len = i;
261
262		if ((seed = EC_GROUP_get0_seed(x)) != NULL)
263			seed_len = EC_GROUP_get_seed_len(x);
264
265		buf_len += 10;
266		if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
267			{
268			reason = ERR_R_MALLOC_FAILURE;
269			goto err;
270			}
271
272		if (!BIO_indent(bp, off, 128))
273			goto err;
274
275		/* print the 'short name' of the field type */
276		if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
277			<= 0)
278			goto err;
279
280		if (is_char_two)
281			{
282			/* print the 'short name' of the base type OID */
283			int basis_type = EC_GROUP_get_basis_type(x);
284			if (basis_type == 0)
285				goto err;
286
287			if (!BIO_indent(bp, off, 128))
288				goto err;
289
290			if (BIO_printf(bp, "Basis Type: %s\n",
291				OBJ_nid2sn(basis_type)) <= 0)
292				goto err;
293
294			/* print the polynomial */
295			if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
296				off))
297				goto err;
298			}
299		else
300			{
301			if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer,off))
302				goto err;
303			}
304		if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off))
305			goto err;
306		if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
307			goto err;
308		if (form == POINT_CONVERSION_COMPRESSED)
309			{
310			if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
311				buffer, off))
312				goto err;
313			}
314		else if (form == POINT_CONVERSION_UNCOMPRESSED)
315			{
316			if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
317				buffer, off))
318				goto err;
319			}
320		else /* form == POINT_CONVERSION_HYBRID */
321			{
322			if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
323				buffer, off))
324				goto err;
325			}
326		if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
327			buffer, off)) goto err;
328		if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
329			buffer, off)) goto err;
330		if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
331			goto err;
332		}
333	ret=1;
334err:
335	if (!ret)
336 		ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
337	if (p)
338		BN_free(p);
339	if (a)
340		BN_free(a);
341	if (b)
342		BN_free(b);
343	if (gen)
344		BN_free(gen);
345	if (order)
346		BN_free(order);
347	if (cofactor)
348		BN_free(cofactor);
349	if (ctx)
350		BN_CTX_free(ctx);
351	if (buffer != NULL)
352		OPENSSL_free(buffer);
353	return(ret);
354	}
355
356static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
357		size_t len, int off)
358	{
359	size_t i;
360	char str[128];
361
362	if (buf == NULL)
363		return 1;
364	if (off)
365		{
366		if (off > 128)
367			off=128;
368		memset(str,' ',off);
369		if (BIO_write(fp, str, off) <= 0)
370			return 0;
371		}
372
373	if (BIO_printf(fp,"%s", name) <= 0)
374		return 0;
375
376	for (i=0; i<len; i++)
377		{
378		if ((i%15) == 0)
379			{
380			str[0]='\n';
381			memset(&(str[1]),' ',off+4);
382			if (BIO_write(fp, str, off+1+4) <= 0)
383				return 0;
384			}
385		if (BIO_printf(fp,"%02x%s",buf[i],((i+1) == len)?"":":") <= 0)
386			return 0;
387		}
388	if (BIO_write(fp,"\n",1) <= 0)
389		return 0;
390
391	return 1;
392	}
393