1 /*
2 * Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 *
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11 #include "internal/deprecated.h"
12
13 #include <stdio.h>
14 #include "internal/cryptlib.h"
15 #include <openssl/evp.h>
16 #include <openssl/ec.h>
17 #include <openssl/bn.h>
18
19 #ifndef OPENSSL_NO_DEPRECATED_3_0
20 #ifndef OPENSSL_NO_STDIO
ECPKParameters_print_fp(FILE * fp,const EC_GROUP * x,int off)21 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
22 {
23 BIO *b;
24 int ret;
25
26 if ((b = BIO_new(BIO_s_file())) == NULL) {
27 ERR_raise(ERR_LIB_EC, ERR_R_BUF_LIB);
28 return 0;
29 }
30 BIO_set_fp(b, fp, BIO_NOCLOSE);
31 ret = ECPKParameters_print(b, x, off);
32 BIO_free(b);
33 return ret;
34 }
35
EC_KEY_print_fp(FILE * fp,const EC_KEY * x,int off)36 int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
37 {
38 BIO *b;
39 int ret;
40
41 if ((b = BIO_new(BIO_s_file())) == NULL) {
42 ERR_raise(ERR_LIB_EC, ERR_R_BIO_LIB);
43 return 0;
44 }
45 BIO_set_fp(b, fp, BIO_NOCLOSE);
46 ret = EC_KEY_print(b, x, off);
47 BIO_free(b);
48 return ret;
49 }
50
ECParameters_print_fp(FILE * fp,const EC_KEY * x)51 int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
52 {
53 BIO *b;
54 int ret;
55
56 if ((b = BIO_new(BIO_s_file())) == NULL) {
57 ERR_raise(ERR_LIB_EC, ERR_R_BIO_LIB);
58 return 0;
59 }
60 BIO_set_fp(b, fp, BIO_NOCLOSE);
61 ret = ECParameters_print(b, x);
62 BIO_free(b);
63 return ret;
64 }
65 #endif /* OPENSSL_NO_STDIO */
66
67 static int print_bin(BIO *fp, const char *str, const unsigned char *num,
68 size_t len, int off);
69
ECPKParameters_print(BIO * bp,const EC_GROUP * x,int off)70 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
71 {
72 int ret = 0, reason = ERR_R_BIO_LIB;
73 BN_CTX *ctx = NULL;
74 const EC_POINT *point = NULL;
75 BIGNUM *p = NULL, *a = NULL, *b = NULL;
76 unsigned char *gen_buf = NULL;
77 const BIGNUM *order = NULL, *cofactor = NULL;
78 const unsigned char *seed;
79 size_t seed_len = 0, gen_buf_len = 0;
80
81 static const char *gen_compressed = "Generator (compressed):";
82 static const char *gen_uncompressed = "Generator (uncompressed):";
83 static const char *gen_hybrid = "Generator (hybrid):";
84
85 if (!x) {
86 reason = ERR_R_PASSED_NULL_PARAMETER;
87 goto err;
88 }
89
90 ctx = BN_CTX_new();
91 if (ctx == NULL) {
92 reason = ERR_R_BN_LIB;
93 goto err;
94 }
95
96 if (EC_GROUP_get_asn1_flag(x)) {
97 /* the curve parameter are given by an asn1 OID */
98 int nid;
99 const char *nname;
100
101 if (!BIO_indent(bp, off, 128))
102 goto err;
103
104 nid = EC_GROUP_get_curve_name(x);
105 if (nid == 0)
106 goto err;
107 if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
108 goto err;
109 if (BIO_printf(bp, "\n") <= 0)
110 goto err;
111 nname = EC_curve_nid2nist(nid);
112 if (nname) {
113 if (!BIO_indent(bp, off, 128))
114 goto err;
115 if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
116 goto err;
117 }
118 } else {
119 const char *form_str;
120 /* explicit parameters */
121 int is_char_two = 0;
122 point_conversion_form_t form;
123 int tmp_nid = EC_GROUP_get_field_type(x);
124
125 if (tmp_nid == NID_X9_62_characteristic_two_field)
126 is_char_two = 1;
127
128 if ((p = BN_new()) == NULL || (a = BN_new()) == NULL || (b = BN_new()) == NULL) {
129 reason = ERR_R_BN_LIB;
130 goto err;
131 }
132
133 if (!EC_GROUP_get_curve(x, p, a, b, ctx)) {
134 reason = ERR_R_EC_LIB;
135 goto err;
136 }
137
138 if ((point = EC_GROUP_get0_generator(x)) == NULL) {
139 reason = ERR_R_EC_LIB;
140 goto err;
141 }
142 order = EC_GROUP_get0_order(x);
143 cofactor = EC_GROUP_get0_cofactor(x);
144 if (order == NULL) {
145 reason = ERR_R_EC_LIB;
146 goto err;
147 }
148
149 form = EC_GROUP_get_point_conversion_form(x);
150
151 gen_buf_len = EC_POINT_point2buf(x, point, form, &gen_buf, ctx);
152 if (gen_buf_len == 0) {
153 reason = ERR_R_EC_LIB;
154 goto err;
155 }
156
157 if ((seed = EC_GROUP_get0_seed(x)) != NULL)
158 seed_len = EC_GROUP_get_seed_len(x);
159
160 if (!BIO_indent(bp, off, 128))
161 goto err;
162
163 /* print the 'short name' of the field type */
164 if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
165 <= 0)
166 goto err;
167
168 if (is_char_two) {
169 /* print the 'short name' of the base type OID */
170 int basis_type = EC_GROUP_get_basis_type(x);
171 if (basis_type == 0)
172 goto err;
173
174 if (!BIO_indent(bp, off, 128))
175 goto err;
176
177 if (BIO_printf(bp, "Basis Type: %s\n",
178 OBJ_nid2sn(basis_type))
179 <= 0)
180 goto err;
181
182 /* print the polynomial */
183 if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, NULL, off))
184 goto err;
185 } else {
186 if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, NULL, off))
187 goto err;
188 }
189 if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, NULL, off))
190 goto err;
191 if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, NULL, off))
192 goto err;
193
194 if (form == POINT_CONVERSION_COMPRESSED)
195 form_str = gen_compressed;
196 else if (form == POINT_CONVERSION_UNCOMPRESSED)
197 form_str = gen_uncompressed;
198 else
199 form_str = gen_hybrid;
200 if (gen_buf != NULL
201 && !print_bin(bp, form_str, gen_buf, gen_buf_len, off))
202 goto err;
203
204 if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order, NULL, off))
205 goto err;
206 if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor, NULL, off))
207 goto err;
208 if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
209 goto err;
210 }
211 ret = 1;
212 err:
213 if (!ret)
214 ERR_raise(ERR_LIB_EC, reason);
215 BN_free(p);
216 BN_free(a);
217 BN_free(b);
218 OPENSSL_clear_free(gen_buf, gen_buf_len);
219 BN_CTX_free(ctx);
220 return ret;
221 }
222
print_bin(BIO * fp,const char * name,const unsigned char * buf,size_t len,int off)223 static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
224 size_t len, int off)
225 {
226 size_t i;
227 char str[128 + 1 + 4];
228
229 if (buf == NULL)
230 return 1;
231 if (off > 0) {
232 if (off > 128)
233 off = 128;
234 memset(str, ' ', off);
235 if (BIO_write(fp, str, off) <= 0)
236 return 0;
237 } else {
238 off = 0;
239 }
240
241 if (BIO_printf(fp, "%s", name) <= 0)
242 return 0;
243
244 for (i = 0; i < len; i++) {
245 if ((i % 15) == 0) {
246 str[0] = '\n';
247 memset(&(str[1]), ' ', off + 4);
248 if (BIO_write(fp, str, off + 1 + 4) <= 0)
249 return 0;
250 }
251 if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <= 0)
252 return 0;
253 }
254 if (BIO_write(fp, "\n", 1) <= 0)
255 return 0;
256
257 return 1;
258 }
259 #endif /* OPENSSL_NO_DEPRECATED_3_0 */
260