Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 |
| 71 | int 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 | |
| 87 | int 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 | |
| 103 | int 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 | |
| 120 | int 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 | |
| 132 | int 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 | |
| 144 | static int print_bin(BIO *fp, const char *str, const unsigned char *num, |
| 145 | size_t len, int off); |
| 146 | |
| 147 | int 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 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 210 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 */ |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 220 | { |
| 221 | if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) |
| 222 | { |
| 223 | reason = ERR_R_EC_LIB; |
| 224 | goto err; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | if ((point = EC_GROUP_get0_generator(x)) == NULL) |
| 229 | { |
| 230 | reason = ERR_R_EC_LIB; |
| 231 | goto err; |
| 232 | } |
| 233 | if (!EC_GROUP_get_order(x, order, NULL) || |
| 234 | !EC_GROUP_get_cofactor(x, cofactor, NULL)) |
| 235 | { |
| 236 | reason = ERR_R_EC_LIB; |
| 237 | goto err; |
| 238 | } |
| 239 | |
| 240 | form = EC_GROUP_get_point_conversion_form(x); |
| 241 | |
| 242 | if ((gen = EC_POINT_point2bn(x, point, |
| 243 | form, NULL, ctx)) == NULL) |
| 244 | { |
| 245 | reason = ERR_R_EC_LIB; |
| 246 | goto err; |
| 247 | } |
| 248 | |
| 249 | buf_len = (size_t)BN_num_bytes(p); |
| 250 | if (buf_len < (i = (size_t)BN_num_bytes(a))) |
| 251 | buf_len = i; |
| 252 | if (buf_len < (i = (size_t)BN_num_bytes(b))) |
| 253 | buf_len = i; |
| 254 | if (buf_len < (i = (size_t)BN_num_bytes(gen))) |
| 255 | buf_len = i; |
| 256 | if (buf_len < (i = (size_t)BN_num_bytes(order))) |
| 257 | buf_len = i; |
| 258 | if (buf_len < (i = (size_t)BN_num_bytes(cofactor))) |
| 259 | buf_len = i; |
| 260 | |
| 261 | if ((seed = EC_GROUP_get0_seed(x)) != NULL) |
| 262 | seed_len = EC_GROUP_get_seed_len(x); |
| 263 | |
| 264 | buf_len += 10; |
| 265 | if ((buffer = OPENSSL_malloc(buf_len)) == NULL) |
| 266 | { |
| 267 | reason = ERR_R_MALLOC_FAILURE; |
| 268 | goto err; |
| 269 | } |
| 270 | |
| 271 | if (!BIO_indent(bp, off, 128)) |
| 272 | goto err; |
| 273 | |
| 274 | /* print the 'short name' of the field type */ |
| 275 | if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid)) |
| 276 | <= 0) |
| 277 | goto err; |
| 278 | |
| 279 | if (is_char_two) |
| 280 | { |
| 281 | /* print the 'short name' of the base type OID */ |
| 282 | int basis_type = EC_GROUP_get_basis_type(x); |
| 283 | if (basis_type == 0) |
| 284 | goto err; |
| 285 | |
| 286 | if (!BIO_indent(bp, off, 128)) |
| 287 | goto err; |
| 288 | |
| 289 | if (BIO_printf(bp, "Basis Type: %s\n", |
| 290 | OBJ_nid2sn(basis_type)) <= 0) |
| 291 | goto err; |
| 292 | |
| 293 | /* print the polynomial */ |
| 294 | if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer, |
| 295 | off)) |
| 296 | goto err; |
| 297 | } |
| 298 | else |
| 299 | { |
| 300 | if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer,off)) |
| 301 | goto err; |
| 302 | } |
| 303 | if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, buffer, off)) |
| 304 | goto err; |
| 305 | if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, buffer, off)) |
| 306 | goto err; |
| 307 | if (form == POINT_CONVERSION_COMPRESSED) |
| 308 | { |
| 309 | if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen, |
| 310 | buffer, off)) |
| 311 | goto err; |
| 312 | } |
| 313 | else if (form == POINT_CONVERSION_UNCOMPRESSED) |
| 314 | { |
| 315 | if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen, |
| 316 | buffer, off)) |
| 317 | goto err; |
| 318 | } |
| 319 | else /* form == POINT_CONVERSION_HYBRID */ |
| 320 | { |
| 321 | if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen, |
| 322 | buffer, off)) |
| 323 | goto err; |
| 324 | } |
| 325 | if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order, |
| 326 | buffer, off)) goto err; |
| 327 | if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor, |
| 328 | buffer, off)) goto err; |
| 329 | if (seed && !print_bin(bp, "Seed:", seed, seed_len, off)) |
| 330 | goto err; |
| 331 | } |
| 332 | ret=1; |
| 333 | err: |
| 334 | if (!ret) |
| 335 | ECerr(EC_F_ECPKPARAMETERS_PRINT, reason); |
| 336 | if (p) |
| 337 | BN_free(p); |
| 338 | if (a) |
| 339 | BN_free(a); |
| 340 | if (b) |
| 341 | BN_free(b); |
| 342 | if (gen) |
| 343 | BN_free(gen); |
| 344 | if (order) |
| 345 | BN_free(order); |
| 346 | if (cofactor) |
| 347 | BN_free(cofactor); |
| 348 | if (ctx) |
| 349 | BN_CTX_free(ctx); |
| 350 | if (buffer != NULL) |
| 351 | OPENSSL_free(buffer); |
| 352 | return(ret); |
| 353 | } |
| 354 | |
| 355 | static int print_bin(BIO *fp, const char *name, const unsigned char *buf, |
| 356 | size_t len, int off) |
| 357 | { |
| 358 | size_t i; |
| 359 | char str[128]; |
| 360 | |
| 361 | if (buf == NULL) |
| 362 | return 1; |
| 363 | if (off) |
| 364 | { |
| 365 | if (off > 128) |
| 366 | off=128; |
| 367 | memset(str,' ',off); |
| 368 | if (BIO_write(fp, str, off) <= 0) |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | if (BIO_printf(fp,"%s", name) <= 0) |
| 373 | return 0; |
| 374 | |
| 375 | for (i=0; i<len; i++) |
| 376 | { |
| 377 | if ((i%15) == 0) |
| 378 | { |
| 379 | str[0]='\n'; |
| 380 | memset(&(str[1]),' ',off+4); |
| 381 | if (BIO_write(fp, str, off+1+4) <= 0) |
| 382 | return 0; |
| 383 | } |
| 384 | if (BIO_printf(fp,"%02x%s",buf[i],((i+1) == len)?"":":") <= 0) |
| 385 | return 0; |
| 386 | } |
| 387 | if (BIO_write(fp,"\n",1) <= 0) |
| 388 | return 0; |
| 389 | |
| 390 | return 1; |
| 391 | } |