1 /* $OpenBSD: eck_prn.c,v 1.17 2021/04/20 17:12:43 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; 125 pk = EVP_PKEY_new(); 126 if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *) x)) 127 return 0; 128 ret = EVP_PKEY_print_private(bp, pk, off, NULL); 129 EVP_PKEY_free(pk); 130 return ret; 131 } 132 133 int 134 ECParameters_print(BIO * bp, const EC_KEY * x) 135 { 136 EVP_PKEY *pk; 137 int ret; 138 pk = EVP_PKEY_new(); 139 if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *) x)) 140 return 0; 141 ret = EVP_PKEY_print_params(bp, pk, 4, NULL); 142 EVP_PKEY_free(pk); 143 return ret; 144 } 145 146 static int 147 print_bin(BIO * fp, const char *str, const unsigned char *num, 148 size_t len, int off); 149 150 int 151 ECPKParameters_print(BIO * bp, const EC_GROUP * x, int off) 152 { 153 unsigned char *buffer = NULL; 154 size_t buf_len = 0, i; 155 int ret = 0, reason = ERR_R_BIO_LIB; 156 BN_CTX *ctx = NULL; 157 const EC_POINT *point = NULL; 158 BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL, *order = NULL, 159 *cofactor = NULL; 160 const unsigned char *seed; 161 size_t seed_len = 0; 162 const char *nname; 163 164 static const char *gen_compressed = "Generator (compressed):"; 165 static const char *gen_uncompressed = "Generator (uncompressed):"; 166 static const char *gen_hybrid = "Generator (hybrid):"; 167 168 if (!x) { 169 reason = ERR_R_PASSED_NULL_PARAMETER; 170 goto err; 171 } 172 ctx = BN_CTX_new(); 173 if (ctx == NULL) { 174 reason = ERR_R_MALLOC_FAILURE; 175 goto err; 176 } 177 if (EC_GROUP_get_asn1_flag(x)) { 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 nname = EC_curve_nid2nist(nid); 194 if (nname) { 195 if (!BIO_indent(bp, off, 128)) 196 goto err; 197 if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0) 198 goto err; 199 } 200 } else { 201 /* explicit parameters */ 202 int is_char_two = 0; 203 point_conversion_form_t form; 204 int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x)); 205 206 if (tmp_nid == NID_X9_62_characteristic_two_field) 207 is_char_two = 1; 208 209 if ((p = BN_new()) == NULL || (a = BN_new()) == NULL || 210 (b = BN_new()) == NULL || (order = BN_new()) == NULL || 211 (cofactor = BN_new()) == NULL) { 212 reason = ERR_R_MALLOC_FAILURE; 213 goto err; 214 } 215 if (!EC_GROUP_get_curve(x, p, a, b, ctx)) { 216 reason = ERR_R_EC_LIB; 217 goto err; 218 } 219 220 if ((point = EC_GROUP_get0_generator(x)) == NULL) { 221 reason = ERR_R_EC_LIB; 222 goto err; 223 } 224 if (!EC_GROUP_get_order(x, order, NULL) || 225 !EC_GROUP_get_cofactor(x, cofactor, NULL)) { 226 reason = ERR_R_EC_LIB; 227 goto err; 228 } 229 form = EC_GROUP_get_point_conversion_form(x); 230 231 if ((gen = EC_POINT_point2bn(x, point, 232 form, NULL, ctx)) == NULL) { 233 reason = ERR_R_EC_LIB; 234 goto err; 235 } 236 buf_len = (size_t) BN_num_bytes(p); 237 if (buf_len < (i = (size_t) BN_num_bytes(a))) 238 buf_len = i; 239 if (buf_len < (i = (size_t) BN_num_bytes(b))) 240 buf_len = i; 241 if (buf_len < (i = (size_t) BN_num_bytes(gen))) 242 buf_len = i; 243 if (buf_len < (i = (size_t) BN_num_bytes(order))) 244 buf_len = i; 245 if (buf_len < (i = (size_t) BN_num_bytes(cofactor))) 246 buf_len = i; 247 248 if ((seed = EC_GROUP_get0_seed(x)) != NULL) 249 seed_len = EC_GROUP_get_seed_len(x); 250 251 buf_len += 10; 252 if ((buffer = malloc(buf_len)) == NULL) { 253 reason = ERR_R_MALLOC_FAILURE; 254 goto err; 255 } 256 if (!BIO_indent(bp, off, 128)) 257 goto err; 258 259 /* print the 'short name' of the field type */ 260 if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid)) 261 <= 0) 262 goto err; 263 264 if (is_char_two) { 265 /* print the 'short name' of the base type OID */ 266 int basis_type = EC_GROUP_get_basis_type(x); 267 if (basis_type == 0) 268 goto err; 269 270 if (!BIO_indent(bp, off, 128)) 271 goto err; 272 273 if (BIO_printf(bp, "Basis Type: %s\n", 274 OBJ_nid2sn(basis_type)) <= 0) 275 goto err; 276 277 /* print the polynomial */ 278 if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer, 279 off)) 280 goto err; 281 } else { 282 if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off)) 283 goto err; 284 } 285 if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, buffer, off)) 286 goto err; 287 if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, buffer, off)) 288 goto err; 289 if (form == POINT_CONVERSION_COMPRESSED) { 290 if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen, 291 buffer, off)) 292 goto err; 293 } else if (form == POINT_CONVERSION_UNCOMPRESSED) { 294 if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen, 295 buffer, off)) 296 goto err; 297 } else { /* form == POINT_CONVERSION_HYBRID */ 298 if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen, 299 buffer, off)) 300 goto err; 301 } 302 if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order, 303 buffer, off)) 304 goto err; 305 if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor, 306 buffer, off)) 307 goto err; 308 if (seed && !print_bin(bp, "Seed:", seed, seed_len, off)) 309 goto err; 310 } 311 ret = 1; 312 err: 313 if (!ret) 314 ECerror(reason); 315 BN_free(p); 316 BN_free(a); 317 BN_free(b); 318 BN_free(gen); 319 BN_free(order); 320 BN_free(cofactor); 321 BN_CTX_free(ctx); 322 free(buffer); 323 return (ret); 324 } 325 326 static int 327 print_bin(BIO * fp, const char *name, const unsigned char *buf, 328 size_t len, int off) 329 { 330 size_t i; 331 char str[128]; 332 333 if (buf == NULL) 334 return 1; 335 if (off) { 336 if (off > 128) 337 off = 128; 338 memset(str, ' ', off); 339 if (BIO_write(fp, str, off) <= 0) 340 return 0; 341 } 342 if (BIO_printf(fp, "%s", name) <= 0) 343 return 0; 344 345 for (i = 0; i < len; i++) { 346 if ((i % 15) == 0) { 347 str[0] = '\n'; 348 memset(&(str[1]), ' ', off + 4); 349 if (BIO_write(fp, str, off + 1 + 4) <= 0) 350 return 0; 351 } 352 if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <= 0) 353 return 0; 354 } 355 if (BIO_write(fp, "\n", 1) <= 0) 356 return 0; 357 358 return 1; 359 } 360