1 /* $OpenBSD: eck_prn.c,v 1.20 2022/11/19 07:29:29 tb Exp $ */ 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 <string.h> 66 67 #include <openssl/bn.h> 68 #include <openssl/ec.h> 69 #include <openssl/err.h> 70 #include <openssl/evp.h> 71 72 int 73 ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off) 74 { 75 BIO *b; 76 int ret; 77 78 if ((b = BIO_new(BIO_s_file())) == NULL) { 79 ECerror(ERR_R_BUF_LIB); 80 return (0); 81 } 82 BIO_set_fp(b, fp, BIO_NOCLOSE); 83 ret = ECPKParameters_print(b, x, off); 84 BIO_free(b); 85 return (ret); 86 } 87 88 int 89 EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off) 90 { 91 BIO *b; 92 int ret; 93 94 if ((b = BIO_new(BIO_s_file())) == NULL) { 95 ECerror(ERR_R_BIO_LIB); 96 return (0); 97 } 98 BIO_set_fp(b, fp, BIO_NOCLOSE); 99 ret = EC_KEY_print(b, x, off); 100 BIO_free(b); 101 return (ret); 102 } 103 104 int 105 ECParameters_print_fp(FILE *fp, const EC_KEY *x) 106 { 107 BIO *b; 108 int ret; 109 110 if ((b = BIO_new(BIO_s_file())) == NULL) { 111 ECerror(ERR_R_BIO_LIB); 112 return (0); 113 } 114 BIO_set_fp(b, fp, BIO_NOCLOSE); 115 ret = ECParameters_print(b, x); 116 BIO_free(b); 117 return (ret); 118 } 119 120 int 121 EC_KEY_print(BIO *bp, const EC_KEY *x, int off) 122 { 123 EVP_PKEY *pk; 124 int ret = 0; 125 126 if ((pk = EVP_PKEY_new()) == NULL) 127 goto err; 128 129 if (!EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *) x)) 130 goto err; 131 132 ret = EVP_PKEY_print_private(bp, pk, off, NULL); 133 err: 134 EVP_PKEY_free(pk); 135 return ret; 136 } 137 138 int 139 ECParameters_print(BIO *bp, const EC_KEY *x) 140 { 141 EVP_PKEY *pk; 142 int ret = 0; 143 144 if ((pk = EVP_PKEY_new()) == NULL) 145 goto err; 146 147 if (!EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *) x)) 148 goto err; 149 150 ret = EVP_PKEY_print_params(bp, pk, 4, NULL); 151 err: 152 EVP_PKEY_free(pk); 153 return ret; 154 } 155 156 static int 157 print_bin(BIO *fp, const char *str, const unsigned char *num, 158 size_t len, int off); 159 160 int 161 ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off) 162 { 163 unsigned char *buffer = NULL; 164 size_t buf_len = 0, i; 165 int ret = 0, reason = ERR_R_BIO_LIB; 166 BN_CTX *ctx = NULL; 167 const EC_POINT *point = NULL; 168 BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL, *order = NULL, 169 *cofactor = NULL; 170 const unsigned char *seed; 171 size_t seed_len = 0; 172 const char *nname; 173 174 static const char *gen_compressed = "Generator (compressed):"; 175 static const char *gen_uncompressed = "Generator (uncompressed):"; 176 static const char *gen_hybrid = "Generator (hybrid):"; 177 178 if (!x) { 179 reason = ERR_R_PASSED_NULL_PARAMETER; 180 goto err; 181 } 182 ctx = BN_CTX_new(); 183 if (ctx == NULL) { 184 reason = ERR_R_MALLOC_FAILURE; 185 goto err; 186 } 187 if (EC_GROUP_get_asn1_flag(x)) { 188 /* the curve parameter are given by an asn1 OID */ 189 int nid; 190 191 if (!BIO_indent(bp, off, 128)) 192 goto err; 193 194 nid = EC_GROUP_get_curve_name(x); 195 if (nid == 0) 196 goto err; 197 198 if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0) 199 goto err; 200 if (BIO_printf(bp, "\n") <= 0) 201 goto err; 202 203 nname = EC_curve_nid2nist(nid); 204 if (nname) { 205 if (!BIO_indent(bp, off, 128)) 206 goto err; 207 if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0) 208 goto err; 209 } 210 } else { 211 /* explicit parameters */ 212 int is_char_two = 0; 213 point_conversion_form_t form; 214 int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x)); 215 216 if (tmp_nid == NID_X9_62_characteristic_two_field) 217 is_char_two = 1; 218 219 if ((p = BN_new()) == NULL || (a = BN_new()) == NULL || 220 (b = BN_new()) == NULL || (order = BN_new()) == NULL || 221 (cofactor = BN_new()) == NULL) { 222 reason = ERR_R_MALLOC_FAILURE; 223 goto err; 224 } 225 if (!EC_GROUP_get_curve(x, p, a, b, ctx)) { 226 reason = ERR_R_EC_LIB; 227 goto err; 228 } 229 230 if ((point = EC_GROUP_get0_generator(x)) == NULL) { 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 reason = ERR_R_EC_LIB; 237 goto err; 238 } 239 form = EC_GROUP_get_point_conversion_form(x); 240 241 if ((gen = EC_POINT_point2bn(x, point, 242 form, NULL, ctx)) == NULL) { 243 reason = ERR_R_EC_LIB; 244 goto err; 245 } 246 buf_len = (size_t) BN_num_bytes(p); 247 if (buf_len < (i = (size_t) BN_num_bytes(a))) 248 buf_len = i; 249 if (buf_len < (i = (size_t) BN_num_bytes(b))) 250 buf_len = i; 251 if (buf_len < (i = (size_t) BN_num_bytes(gen))) 252 buf_len = i; 253 if (buf_len < (i = (size_t) BN_num_bytes(order))) 254 buf_len = i; 255 if (buf_len < (i = (size_t) BN_num_bytes(cofactor))) 256 buf_len = i; 257 258 if ((seed = EC_GROUP_get0_seed(x)) != NULL) 259 seed_len = EC_GROUP_get_seed_len(x); 260 261 buf_len += 10; 262 if ((buffer = malloc(buf_len)) == NULL) { 263 reason = ERR_R_MALLOC_FAILURE; 264 goto err; 265 } 266 if (!BIO_indent(bp, off, 128)) 267 goto err; 268 269 /* print the 'short name' of the field type */ 270 if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid)) 271 <= 0) 272 goto err; 273 274 if (is_char_two) { 275 /* print the 'short name' of the base type OID */ 276 int basis_type = EC_GROUP_get_basis_type(x); 277 if (basis_type == 0) 278 goto err; 279 280 if (!BIO_indent(bp, off, 128)) 281 goto err; 282 283 if (BIO_printf(bp, "Basis Type: %s\n", 284 OBJ_nid2sn(basis_type)) <= 0) 285 goto err; 286 287 /* print the polynomial */ 288 if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer, 289 off)) 290 goto err; 291 } else { 292 if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off)) 293 goto err; 294 } 295 if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, buffer, off)) 296 goto err; 297 if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, buffer, off)) 298 goto err; 299 if (form == POINT_CONVERSION_COMPRESSED) { 300 if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen, 301 buffer, off)) 302 goto err; 303 } else if (form == POINT_CONVERSION_UNCOMPRESSED) { 304 if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen, 305 buffer, off)) 306 goto err; 307 } else { /* form == POINT_CONVERSION_HYBRID */ 308 if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen, 309 buffer, off)) 310 goto err; 311 } 312 if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order, 313 buffer, off)) 314 goto err; 315 if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor, 316 buffer, off)) 317 goto err; 318 if (seed && !print_bin(bp, "Seed:", seed, seed_len, off)) 319 goto err; 320 } 321 ret = 1; 322 err: 323 if (!ret) 324 ECerror(reason); 325 BN_free(p); 326 BN_free(a); 327 BN_free(b); 328 BN_free(gen); 329 BN_free(order); 330 BN_free(cofactor); 331 BN_CTX_free(ctx); 332 free(buffer); 333 return (ret); 334 } 335 336 static int 337 print_bin(BIO *fp, const char *name, const unsigned char *buf, 338 size_t len, int off) 339 { 340 size_t i; 341 char str[128]; 342 343 if (buf == NULL) 344 return 1; 345 if (off) { 346 if (off > 128) 347 off = 128; 348 memset(str, ' ', off); 349 if (BIO_write(fp, str, off) <= 0) 350 return 0; 351 } 352 if (BIO_printf(fp, "%s", name) <= 0) 353 return 0; 354 355 for (i = 0; i < len; i++) { 356 if ((i % 15) == 0) { 357 str[0] = '\n'; 358 memset(&(str[1]), ' ', off + 4); 359 if (BIO_write(fp, str, off + 1 + 4) <= 0) 360 return 0; 361 } 362 if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <= 0) 363 return 0; 364 } 365 if (BIO_write(fp, "\n", 1) <= 0) 366 return 0; 367 368 return 1; 369 } 370