1/*
2 * read_bignum():
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 *
5 * As far as I am concerned, the code I have written for this software
6 * can be used freely for any purpose. Any derived versions of this
7 * software must be clearly marked as such, and if the derived work is
8 * incompatible with the protocol description in the RFC file, it must be
9 * called by a name other than "ssh" or "Secure Shell".
10 *
11 *
12 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34#include "includes.h"
| 1/*
2 * read_bignum():
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 *
5 * As far as I am concerned, the code I have written for this software
6 * can be used freely for any purpose. Any derived versions of this
7 * software must be clearly marked as such, and if the derived work is
8 * incompatible with the protocol description in the RFC file, it must be
9 * called by a name other than "ssh" or "Secure Shell".
10 *
11 *
12 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34#include "includes.h"
|
35RCSID("$OpenBSD: key.c,v 1.45 2002/06/23 03:26:19 deraadt Exp $");
36RCSID("$FreeBSD: head/crypto/openssh/key.c 99063 2002-06-29 11:48:59Z des $");
| 35RCSID("$OpenBSD: key.c,v 1.49 2002/09/09 14:54:14 markus Exp $");
36RCSID("$FreeBSD: head/crypto/openssh/key.c 106130 2002-10-29 10:16:02Z des $");
|
37
38#include <openssl/evp.h>
39
40#include "xmalloc.h"
41#include "key.h"
42#include "rsa.h"
43#include "ssh-dss.h"
44#include "ssh-rsa.h"
45#include "uuencode.h"
46#include "buffer.h"
47#include "bufaux.h"
48#include "log.h"
49
50Key *
51key_new(int type)
52{
53 Key *k;
54 RSA *rsa;
55 DSA *dsa;
56 k = xmalloc(sizeof(*k));
57 k->type = type;
58 k->flags = 0;
59 k->dsa = NULL;
60 k->rsa = NULL;
61 switch (k->type) {
62 case KEY_RSA1:
63 case KEY_RSA:
64 if ((rsa = RSA_new()) == NULL)
65 fatal("key_new: RSA_new failed");
66 if ((rsa->n = BN_new()) == NULL)
67 fatal("key_new: BN_new failed");
68 if ((rsa->e = BN_new()) == NULL)
69 fatal("key_new: BN_new failed");
70 k->rsa = rsa;
71 break;
72 case KEY_DSA:
73 if ((dsa = DSA_new()) == NULL)
74 fatal("key_new: DSA_new failed");
75 if ((dsa->p = BN_new()) == NULL)
76 fatal("key_new: BN_new failed");
77 if ((dsa->q = BN_new()) == NULL)
78 fatal("key_new: BN_new failed");
79 if ((dsa->g = BN_new()) == NULL)
80 fatal("key_new: BN_new failed");
81 if ((dsa->pub_key = BN_new()) == NULL)
82 fatal("key_new: BN_new failed");
83 k->dsa = dsa;
84 break;
85 case KEY_UNSPEC:
86 break;
87 default:
88 fatal("key_new: bad key type %d", k->type);
89 break;
90 }
91 return k;
92}
93
94Key *
95key_new_private(int type)
96{
97 Key *k = key_new(type);
98 switch (k->type) {
99 case KEY_RSA1:
100 case KEY_RSA:
101 if ((k->rsa->d = BN_new()) == NULL)
102 fatal("key_new_private: BN_new failed");
103 if ((k->rsa->iqmp = BN_new()) == NULL)
104 fatal("key_new_private: BN_new failed");
105 if ((k->rsa->q = BN_new()) == NULL)
106 fatal("key_new_private: BN_new failed");
107 if ((k->rsa->p = BN_new()) == NULL)
108 fatal("key_new_private: BN_new failed");
109 if ((k->rsa->dmq1 = BN_new()) == NULL)
110 fatal("key_new_private: BN_new failed");
111 if ((k->rsa->dmp1 = BN_new()) == NULL)
112 fatal("key_new_private: BN_new failed");
113 break;
114 case KEY_DSA:
115 if ((k->dsa->priv_key = BN_new()) == NULL)
116 fatal("key_new_private: BN_new failed");
117 break;
118 case KEY_UNSPEC:
119 break;
120 default:
121 break;
122 }
123 return k;
124}
125
126void
127key_free(Key *k)
128{
129 switch (k->type) {
130 case KEY_RSA1:
131 case KEY_RSA:
132 if (k->rsa != NULL)
133 RSA_free(k->rsa);
134 k->rsa = NULL;
135 break;
136 case KEY_DSA:
137 if (k->dsa != NULL)
138 DSA_free(k->dsa);
139 k->dsa = NULL;
140 break;
141 case KEY_UNSPEC:
142 break;
143 default:
144 fatal("key_free: bad key type %d", k->type);
145 break;
146 }
147 xfree(k);
148}
149int
150key_equal(Key *a, Key *b)
151{
152 if (a == NULL || b == NULL || a->type != b->type)
153 return 0;
154 switch (a->type) {
155 case KEY_RSA1:
156 case KEY_RSA:
157 return a->rsa != NULL && b->rsa != NULL &&
158 BN_cmp(a->rsa->e, b->rsa->e) == 0 &&
159 BN_cmp(a->rsa->n, b->rsa->n) == 0;
160 break;
161 case KEY_DSA:
162 return a->dsa != NULL && b->dsa != NULL &&
163 BN_cmp(a->dsa->p, b->dsa->p) == 0 &&
164 BN_cmp(a->dsa->q, b->dsa->q) == 0 &&
165 BN_cmp(a->dsa->g, b->dsa->g) == 0 &&
166 BN_cmp(a->dsa->pub_key, b->dsa->pub_key) == 0;
167 break;
168 default:
169 fatal("key_equal: bad key type %d", a->type);
170 break;
171 }
172 return 0;
173}
174
| 37
38#include <openssl/evp.h>
39
40#include "xmalloc.h"
41#include "key.h"
42#include "rsa.h"
43#include "ssh-dss.h"
44#include "ssh-rsa.h"
45#include "uuencode.h"
46#include "buffer.h"
47#include "bufaux.h"
48#include "log.h"
49
50Key *
51key_new(int type)
52{
53 Key *k;
54 RSA *rsa;
55 DSA *dsa;
56 k = xmalloc(sizeof(*k));
57 k->type = type;
58 k->flags = 0;
59 k->dsa = NULL;
60 k->rsa = NULL;
61 switch (k->type) {
62 case KEY_RSA1:
63 case KEY_RSA:
64 if ((rsa = RSA_new()) == NULL)
65 fatal("key_new: RSA_new failed");
66 if ((rsa->n = BN_new()) == NULL)
67 fatal("key_new: BN_new failed");
68 if ((rsa->e = BN_new()) == NULL)
69 fatal("key_new: BN_new failed");
70 k->rsa = rsa;
71 break;
72 case KEY_DSA:
73 if ((dsa = DSA_new()) == NULL)
74 fatal("key_new: DSA_new failed");
75 if ((dsa->p = BN_new()) == NULL)
76 fatal("key_new: BN_new failed");
77 if ((dsa->q = BN_new()) == NULL)
78 fatal("key_new: BN_new failed");
79 if ((dsa->g = BN_new()) == NULL)
80 fatal("key_new: BN_new failed");
81 if ((dsa->pub_key = BN_new()) == NULL)
82 fatal("key_new: BN_new failed");
83 k->dsa = dsa;
84 break;
85 case KEY_UNSPEC:
86 break;
87 default:
88 fatal("key_new: bad key type %d", k->type);
89 break;
90 }
91 return k;
92}
93
94Key *
95key_new_private(int type)
96{
97 Key *k = key_new(type);
98 switch (k->type) {
99 case KEY_RSA1:
100 case KEY_RSA:
101 if ((k->rsa->d = BN_new()) == NULL)
102 fatal("key_new_private: BN_new failed");
103 if ((k->rsa->iqmp = BN_new()) == NULL)
104 fatal("key_new_private: BN_new failed");
105 if ((k->rsa->q = BN_new()) == NULL)
106 fatal("key_new_private: BN_new failed");
107 if ((k->rsa->p = BN_new()) == NULL)
108 fatal("key_new_private: BN_new failed");
109 if ((k->rsa->dmq1 = BN_new()) == NULL)
110 fatal("key_new_private: BN_new failed");
111 if ((k->rsa->dmp1 = BN_new()) == NULL)
112 fatal("key_new_private: BN_new failed");
113 break;
114 case KEY_DSA:
115 if ((k->dsa->priv_key = BN_new()) == NULL)
116 fatal("key_new_private: BN_new failed");
117 break;
118 case KEY_UNSPEC:
119 break;
120 default:
121 break;
122 }
123 return k;
124}
125
126void
127key_free(Key *k)
128{
129 switch (k->type) {
130 case KEY_RSA1:
131 case KEY_RSA:
132 if (k->rsa != NULL)
133 RSA_free(k->rsa);
134 k->rsa = NULL;
135 break;
136 case KEY_DSA:
137 if (k->dsa != NULL)
138 DSA_free(k->dsa);
139 k->dsa = NULL;
140 break;
141 case KEY_UNSPEC:
142 break;
143 default:
144 fatal("key_free: bad key type %d", k->type);
145 break;
146 }
147 xfree(k);
148}
149int
150key_equal(Key *a, Key *b)
151{
152 if (a == NULL || b == NULL || a->type != b->type)
153 return 0;
154 switch (a->type) {
155 case KEY_RSA1:
156 case KEY_RSA:
157 return a->rsa != NULL && b->rsa != NULL &&
158 BN_cmp(a->rsa->e, b->rsa->e) == 0 &&
159 BN_cmp(a->rsa->n, b->rsa->n) == 0;
160 break;
161 case KEY_DSA:
162 return a->dsa != NULL && b->dsa != NULL &&
163 BN_cmp(a->dsa->p, b->dsa->p) == 0 &&
164 BN_cmp(a->dsa->q, b->dsa->q) == 0 &&
165 BN_cmp(a->dsa->g, b->dsa->g) == 0 &&
166 BN_cmp(a->dsa->pub_key, b->dsa->pub_key) == 0;
167 break;
168 default:
169 fatal("key_equal: bad key type %d", a->type);
170 break;
171 }
172 return 0;
173}
174
|
175static u_char*
| 175static u_char *
|
176key_fingerprint_raw(Key *k, enum fp_type dgst_type, u_int *dgst_raw_length)
177{
178 const EVP_MD *md = NULL;
179 EVP_MD_CTX ctx;
180 u_char *blob = NULL;
181 u_char *retval = NULL;
182 u_int len = 0;
183 int nlen, elen;
184
185 *dgst_raw_length = 0;
186
187 switch (dgst_type) {
188 case SSH_FP_MD5:
189 md = EVP_md5();
190 break;
191 case SSH_FP_SHA1:
192 md = EVP_sha1();
193 break;
194 default:
195 fatal("key_fingerprint_raw: bad digest type %d",
196 dgst_type);
197 }
198 switch (k->type) {
199 case KEY_RSA1:
200 nlen = BN_num_bytes(k->rsa->n);
201 elen = BN_num_bytes(k->rsa->e);
202 len = nlen + elen;
203 blob = xmalloc(len);
204 BN_bn2bin(k->rsa->n, blob);
205 BN_bn2bin(k->rsa->e, blob + nlen);
206 break;
207 case KEY_DSA:
208 case KEY_RSA:
209 key_to_blob(k, &blob, &len);
210 break;
211 case KEY_UNSPEC:
212 return retval;
213 break;
214 default:
215 fatal("key_fingerprint_raw: bad key type %d", k->type);
216 break;
217 }
218 if (blob != NULL) {
219 retval = xmalloc(EVP_MAX_MD_SIZE);
220 EVP_DigestInit(&ctx, md);
221 EVP_DigestUpdate(&ctx, blob, len);
222 EVP_DigestFinal(&ctx, retval, dgst_raw_length);
223 memset(blob, 0, len);
224 xfree(blob);
225 } else {
226 fatal("key_fingerprint_raw: blob is null");
227 }
228 return retval;
229}
230
| 176key_fingerprint_raw(Key *k, enum fp_type dgst_type, u_int *dgst_raw_length)
177{
178 const EVP_MD *md = NULL;
179 EVP_MD_CTX ctx;
180 u_char *blob = NULL;
181 u_char *retval = NULL;
182 u_int len = 0;
183 int nlen, elen;
184
185 *dgst_raw_length = 0;
186
187 switch (dgst_type) {
188 case SSH_FP_MD5:
189 md = EVP_md5();
190 break;
191 case SSH_FP_SHA1:
192 md = EVP_sha1();
193 break;
194 default:
195 fatal("key_fingerprint_raw: bad digest type %d",
196 dgst_type);
197 }
198 switch (k->type) {
199 case KEY_RSA1:
200 nlen = BN_num_bytes(k->rsa->n);
201 elen = BN_num_bytes(k->rsa->e);
202 len = nlen + elen;
203 blob = xmalloc(len);
204 BN_bn2bin(k->rsa->n, blob);
205 BN_bn2bin(k->rsa->e, blob + nlen);
206 break;
207 case KEY_DSA:
208 case KEY_RSA:
209 key_to_blob(k, &blob, &len);
210 break;
211 case KEY_UNSPEC:
212 return retval;
213 break;
214 default:
215 fatal("key_fingerprint_raw: bad key type %d", k->type);
216 break;
217 }
218 if (blob != NULL) {
219 retval = xmalloc(EVP_MAX_MD_SIZE);
220 EVP_DigestInit(&ctx, md);
221 EVP_DigestUpdate(&ctx, blob, len);
222 EVP_DigestFinal(&ctx, retval, dgst_raw_length);
223 memset(blob, 0, len);
224 xfree(blob);
225 } else {
226 fatal("key_fingerprint_raw: blob is null");
227 }
228 return retval;
229}
230
|
231static char*
232key_fingerprint_hex(u_char* dgst_raw, u_int dgst_raw_len)
| 231static char *
232key_fingerprint_hex(u_char *dgst_raw, u_int dgst_raw_len)
|
233{
234 char *retval;
235 int i;
236
237 retval = xmalloc(dgst_raw_len * 3 + 1);
238 retval[0] = '\0';
239 for (i = 0; i < dgst_raw_len; i++) {
240 char hex[4];
241 snprintf(hex, sizeof(hex), "%02x:", dgst_raw[i]);
242 strlcat(retval, hex, dgst_raw_len * 3);
243 }
244 retval[(dgst_raw_len * 3) - 1] = '\0';
245 return retval;
246}
247
| 233{
234 char *retval;
235 int i;
236
237 retval = xmalloc(dgst_raw_len * 3 + 1);
238 retval[0] = '\0';
239 for (i = 0; i < dgst_raw_len; i++) {
240 char hex[4];
241 snprintf(hex, sizeof(hex), "%02x:", dgst_raw[i]);
242 strlcat(retval, hex, dgst_raw_len * 3);
243 }
244 retval[(dgst_raw_len * 3) - 1] = '\0';
245 return retval;
246}
247
|
248static char*
249key_fingerprint_bubblebabble(u_char* dgst_raw, u_int dgst_raw_len)
| 248static char *
249key_fingerprint_bubblebabble(u_char *dgst_raw, u_int dgst_raw_len)
|
250{
251 char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' };
252 char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm',
253 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' };
254 u_int i, j = 0, rounds, seed = 1;
255 char *retval;
256
257 rounds = (dgst_raw_len / 2) + 1;
258 retval = xmalloc(sizeof(char) * (rounds*6));
259 retval[j++] = 'x';
260 for (i = 0; i < rounds; i++) {
261 u_int idx0, idx1, idx2, idx3, idx4;
262 if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) {
263 idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) +
264 seed) % 6;
265 idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15;
266 idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) +
267 (seed / 6)) % 6;
268 retval[j++] = vowels[idx0];
269 retval[j++] = consonants[idx1];
270 retval[j++] = vowels[idx2];
271 if ((i + 1) < rounds) {
272 idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15;
273 idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15;
274 retval[j++] = consonants[idx3];
275 retval[j++] = '-';
276 retval[j++] = consonants[idx4];
277 seed = ((seed * 5) +
278 ((((u_int)(dgst_raw[2 * i])) * 7) +
279 ((u_int)(dgst_raw[(2 * i) + 1])))) % 36;
280 }
281 } else {
282 idx0 = seed % 6;
283 idx1 = 16;
284 idx2 = seed / 6;
285 retval[j++] = vowels[idx0];
286 retval[j++] = consonants[idx1];
287 retval[j++] = vowels[idx2];
288 }
289 }
290 retval[j++] = 'x';
291 retval[j++] = '\0';
292 return retval;
293}
294
| 250{
251 char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' };
252 char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm',
253 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' };
254 u_int i, j = 0, rounds, seed = 1;
255 char *retval;
256
257 rounds = (dgst_raw_len / 2) + 1;
258 retval = xmalloc(sizeof(char) * (rounds*6));
259 retval[j++] = 'x';
260 for (i = 0; i < rounds; i++) {
261 u_int idx0, idx1, idx2, idx3, idx4;
262 if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) {
263 idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) +
264 seed) % 6;
265 idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15;
266 idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) +
267 (seed / 6)) % 6;
268 retval[j++] = vowels[idx0];
269 retval[j++] = consonants[idx1];
270 retval[j++] = vowels[idx2];
271 if ((i + 1) < rounds) {
272 idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15;
273 idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15;
274 retval[j++] = consonants[idx3];
275 retval[j++] = '-';
276 retval[j++] = consonants[idx4];
277 seed = ((seed * 5) +
278 ((((u_int)(dgst_raw[2 * i])) * 7) +
279 ((u_int)(dgst_raw[(2 * i) + 1])))) % 36;
280 }
281 } else {
282 idx0 = seed % 6;
283 idx1 = 16;
284 idx2 = seed / 6;
285 retval[j++] = vowels[idx0];
286 retval[j++] = consonants[idx1];
287 retval[j++] = vowels[idx2];
288 }
289 }
290 retval[j++] = 'x';
291 retval[j++] = '\0';
292 return retval;
293}
294
|
295char*
| 295char *
|
296key_fingerprint(Key *k, enum fp_type dgst_type, enum fp_rep dgst_rep)
297{
298 char *retval = NULL;
299 u_char *dgst_raw;
300 u_int dgst_raw_len;
301
302 dgst_raw = key_fingerprint_raw(k, dgst_type, &dgst_raw_len);
303 if (!dgst_raw)
304 fatal("key_fingerprint: null from key_fingerprint_raw()");
305 switch (dgst_rep) {
306 case SSH_FP_HEX:
307 retval = key_fingerprint_hex(dgst_raw, dgst_raw_len);
308 break;
309 case SSH_FP_BUBBLEBABBLE:
310 retval = key_fingerprint_bubblebabble(dgst_raw, dgst_raw_len);
311 break;
312 default:
313 fatal("key_fingerprint_ex: bad digest representation %d",
314 dgst_rep);
315 break;
316 }
317 memset(dgst_raw, 0, dgst_raw_len);
318 xfree(dgst_raw);
319 return retval;
320}
321
322/*
323 * Reads a multiple-precision integer in decimal from the buffer, and advances
324 * the pointer. The integer must already be initialized. This function is
325 * permitted to modify the buffer. This leaves *cpp to point just beyond the
326 * last processed (and maybe modified) character. Note that this may modify
327 * the buffer containing the number.
328 */
329static int
330read_bignum(char **cpp, BIGNUM * value)
331{
332 char *cp = *cpp;
333 int old;
334
335 /* Skip any leading whitespace. */
336 for (; *cp == ' ' || *cp == '\t'; cp++)
337 ;
338
339 /* Check that it begins with a decimal digit. */
340 if (*cp < '0' || *cp > '9')
341 return 0;
342
343 /* Save starting position. */
344 *cpp = cp;
345
346 /* Move forward until all decimal digits skipped. */
347 for (; *cp >= '0' && *cp <= '9'; cp++)
348 ;
349
350 /* Save the old terminating character, and replace it by \0. */
351 old = *cp;
352 *cp = 0;
353
354 /* Parse the number. */
355 if (BN_dec2bn(&value, *cpp) == 0)
356 return 0;
357
358 /* Restore old terminating character. */
359 *cp = old;
360
361 /* Move beyond the number and return success. */
362 *cpp = cp;
363 return 1;
364}
365
366static int
367write_bignum(FILE *f, BIGNUM *num)
368{
369 char *buf = BN_bn2dec(num);
370 if (buf == NULL) {
371 error("write_bignum: BN_bn2dec() failed");
372 return 0;
373 }
374 fprintf(f, " %s", buf);
375 OPENSSL_free(buf);
376 return 1;
377}
378
379/* returns 1 ok, -1 error */
380int
381key_read(Key *ret, char **cpp)
382{
383 Key *k;
384 int success = -1;
385 char *cp, *space;
386 int len, n, type;
387 u_int bits;
388 u_char *blob;
389
390 cp = *cpp;
391
392 switch (ret->type) {
393 case KEY_RSA1:
394 /* Get number of bits. */
395 if (*cp < '0' || *cp > '9')
396 return -1; /* Bad bit count... */
397 for (bits = 0; *cp >= '0' && *cp <= '9'; cp++)
398 bits = 10 * bits + *cp - '0';
399 if (bits == 0)
400 return -1;
401 *cpp = cp;
402 /* Get public exponent, public modulus. */
403 if (!read_bignum(cpp, ret->rsa->e))
404 return -1;
405 if (!read_bignum(cpp, ret->rsa->n))
406 return -1;
407 success = 1;
408 break;
409 case KEY_UNSPEC:
410 case KEY_RSA:
411 case KEY_DSA:
412 space = strchr(cp, ' ');
413 if (space == NULL) {
414 debug3("key_read: no space");
415 return -1;
416 }
417 *space = '\0';
418 type = key_type_from_name(cp);
419 *space = ' ';
420 if (type == KEY_UNSPEC) {
421 debug3("key_read: no key found");
422 return -1;
423 }
424 cp = space+1;
425 if (*cp == '\0') {
426 debug3("key_read: short string");
427 return -1;
428 }
429 if (ret->type == KEY_UNSPEC) {
430 ret->type = type;
431 } else if (ret->type != type) {
432 /* is a key, but different type */
433 debug3("key_read: type mismatch");
434 return -1;
435 }
436 len = 2*strlen(cp);
437 blob = xmalloc(len);
438 n = uudecode(cp, blob, len);
439 if (n < 0) {
440 error("key_read: uudecode %s failed", cp);
441 xfree(blob);
442 return -1;
443 }
444 k = key_from_blob(blob, n);
445 xfree(blob);
446 if (k == NULL) {
447 error("key_read: key_from_blob %s failed", cp);
448 return -1;
449 }
450 if (k->type != type) {
451 error("key_read: type mismatch: encoding error");
452 key_free(k);
453 return -1;
454 }
455/*XXXX*/
456 if (ret->type == KEY_RSA) {
457 if (ret->rsa != NULL)
458 RSA_free(ret->rsa);
459 ret->rsa = k->rsa;
460 k->rsa = NULL;
461 success = 1;
462#ifdef DEBUG_PK
463 RSA_print_fp(stderr, ret->rsa, 8);
464#endif
465 } else {
466 if (ret->dsa != NULL)
467 DSA_free(ret->dsa);
468 ret->dsa = k->dsa;
469 k->dsa = NULL;
470 success = 1;
471#ifdef DEBUG_PK
472 DSA_print_fp(stderr, ret->dsa, 8);
473#endif
474 }
475/*XXXX*/
476 key_free(k);
477 if (success != 1)
478 break;
479 /* advance cp: skip whitespace and data */
480 while (*cp == ' ' || *cp == '\t')
481 cp++;
482 while (*cp != '\0' && *cp != ' ' && *cp != '\t')
483 cp++;
484 *cpp = cp;
485 break;
486 default:
487 fatal("key_read: bad key type: %d", ret->type);
488 break;
489 }
490 return success;
491}
492
493int
494key_write(Key *key, FILE *f)
495{
496 int n, success = 0;
497 u_int len, bits = 0;
| 296key_fingerprint(Key *k, enum fp_type dgst_type, enum fp_rep dgst_rep)
297{
298 char *retval = NULL;
299 u_char *dgst_raw;
300 u_int dgst_raw_len;
301
302 dgst_raw = key_fingerprint_raw(k, dgst_type, &dgst_raw_len);
303 if (!dgst_raw)
304 fatal("key_fingerprint: null from key_fingerprint_raw()");
305 switch (dgst_rep) {
306 case SSH_FP_HEX:
307 retval = key_fingerprint_hex(dgst_raw, dgst_raw_len);
308 break;
309 case SSH_FP_BUBBLEBABBLE:
310 retval = key_fingerprint_bubblebabble(dgst_raw, dgst_raw_len);
311 break;
312 default:
313 fatal("key_fingerprint_ex: bad digest representation %d",
314 dgst_rep);
315 break;
316 }
317 memset(dgst_raw, 0, dgst_raw_len);
318 xfree(dgst_raw);
319 return retval;
320}
321
322/*
323 * Reads a multiple-precision integer in decimal from the buffer, and advances
324 * the pointer. The integer must already be initialized. This function is
325 * permitted to modify the buffer. This leaves *cpp to point just beyond the
326 * last processed (and maybe modified) character. Note that this may modify
327 * the buffer containing the number.
328 */
329static int
330read_bignum(char **cpp, BIGNUM * value)
331{
332 char *cp = *cpp;
333 int old;
334
335 /* Skip any leading whitespace. */
336 for (; *cp == ' ' || *cp == '\t'; cp++)
337 ;
338
339 /* Check that it begins with a decimal digit. */
340 if (*cp < '0' || *cp > '9')
341 return 0;
342
343 /* Save starting position. */
344 *cpp = cp;
345
346 /* Move forward until all decimal digits skipped. */
347 for (; *cp >= '0' && *cp <= '9'; cp++)
348 ;
349
350 /* Save the old terminating character, and replace it by \0. */
351 old = *cp;
352 *cp = 0;
353
354 /* Parse the number. */
355 if (BN_dec2bn(&value, *cpp) == 0)
356 return 0;
357
358 /* Restore old terminating character. */
359 *cp = old;
360
361 /* Move beyond the number and return success. */
362 *cpp = cp;
363 return 1;
364}
365
366static int
367write_bignum(FILE *f, BIGNUM *num)
368{
369 char *buf = BN_bn2dec(num);
370 if (buf == NULL) {
371 error("write_bignum: BN_bn2dec() failed");
372 return 0;
373 }
374 fprintf(f, " %s", buf);
375 OPENSSL_free(buf);
376 return 1;
377}
378
379/* returns 1 ok, -1 error */
380int
381key_read(Key *ret, char **cpp)
382{
383 Key *k;
384 int success = -1;
385 char *cp, *space;
386 int len, n, type;
387 u_int bits;
388 u_char *blob;
389
390 cp = *cpp;
391
392 switch (ret->type) {
393 case KEY_RSA1:
394 /* Get number of bits. */
395 if (*cp < '0' || *cp > '9')
396 return -1; /* Bad bit count... */
397 for (bits = 0; *cp >= '0' && *cp <= '9'; cp++)
398 bits = 10 * bits + *cp - '0';
399 if (bits == 0)
400 return -1;
401 *cpp = cp;
402 /* Get public exponent, public modulus. */
403 if (!read_bignum(cpp, ret->rsa->e))
404 return -1;
405 if (!read_bignum(cpp, ret->rsa->n))
406 return -1;
407 success = 1;
408 break;
409 case KEY_UNSPEC:
410 case KEY_RSA:
411 case KEY_DSA:
412 space = strchr(cp, ' ');
413 if (space == NULL) {
414 debug3("key_read: no space");
415 return -1;
416 }
417 *space = '\0';
418 type = key_type_from_name(cp);
419 *space = ' ';
420 if (type == KEY_UNSPEC) {
421 debug3("key_read: no key found");
422 return -1;
423 }
424 cp = space+1;
425 if (*cp == '\0') {
426 debug3("key_read: short string");
427 return -1;
428 }
429 if (ret->type == KEY_UNSPEC) {
430 ret->type = type;
431 } else if (ret->type != type) {
432 /* is a key, but different type */
433 debug3("key_read: type mismatch");
434 return -1;
435 }
436 len = 2*strlen(cp);
437 blob = xmalloc(len);
438 n = uudecode(cp, blob, len);
439 if (n < 0) {
440 error("key_read: uudecode %s failed", cp);
441 xfree(blob);
442 return -1;
443 }
444 k = key_from_blob(blob, n);
445 xfree(blob);
446 if (k == NULL) {
447 error("key_read: key_from_blob %s failed", cp);
448 return -1;
449 }
450 if (k->type != type) {
451 error("key_read: type mismatch: encoding error");
452 key_free(k);
453 return -1;
454 }
455/*XXXX*/
456 if (ret->type == KEY_RSA) {
457 if (ret->rsa != NULL)
458 RSA_free(ret->rsa);
459 ret->rsa = k->rsa;
460 k->rsa = NULL;
461 success = 1;
462#ifdef DEBUG_PK
463 RSA_print_fp(stderr, ret->rsa, 8);
464#endif
465 } else {
466 if (ret->dsa != NULL)
467 DSA_free(ret->dsa);
468 ret->dsa = k->dsa;
469 k->dsa = NULL;
470 success = 1;
471#ifdef DEBUG_PK
472 DSA_print_fp(stderr, ret->dsa, 8);
473#endif
474 }
475/*XXXX*/
476 key_free(k);
477 if (success != 1)
478 break;
479 /* advance cp: skip whitespace and data */
480 while (*cp == ' ' || *cp == '\t')
481 cp++;
482 while (*cp != '\0' && *cp != ' ' && *cp != '\t')
483 cp++;
484 *cpp = cp;
485 break;
486 default:
487 fatal("key_read: bad key type: %d", ret->type);
488 break;
489 }
490 return success;
491}
492
493int
494key_write(Key *key, FILE *f)
495{
496 int n, success = 0;
497 u_int len, bits = 0;
|
498 u_char *blob, *uu;
| 498 u_char *blob;
499 char *uu;
|
499
500 if (key->type == KEY_RSA1 && key->rsa != NULL) {
501 /* size of modulus 'n' */
502 bits = BN_num_bits(key->rsa->n);
503 fprintf(f, "%u", bits);
504 if (write_bignum(f, key->rsa->e) &&
505 write_bignum(f, key->rsa->n)) {
506 success = 1;
507 } else {
508 error("key_write: failed for RSA key");
509 }
510 } else if ((key->type == KEY_DSA && key->dsa != NULL) ||
511 (key->type == KEY_RSA && key->rsa != NULL)) {
512 key_to_blob(key, &blob, &len);
513 uu = xmalloc(2*len);
514 n = uuencode(blob, len, uu, 2*len);
515 if (n > 0) {
516 fprintf(f, "%s %s", key_ssh_name(key), uu);
517 success = 1;
518 }
519 xfree(blob);
520 xfree(uu);
521 }
522 return success;
523}
524
525char *
526key_type(Key *k)
527{
528 switch (k->type) {
529 case KEY_RSA1:
530 return "RSA1";
531 break;
532 case KEY_RSA:
533 return "RSA";
534 break;
535 case KEY_DSA:
536 return "DSA";
537 break;
538 }
539 return "unknown";
540}
541
542char *
543key_ssh_name(Key *k)
544{
545 switch (k->type) {
546 case KEY_RSA:
547 return "ssh-rsa";
548 break;
549 case KEY_DSA:
550 return "ssh-dss";
551 break;
552 }
553 return "ssh-unknown";
554}
555
556u_int
557key_size(Key *k)
558{
559 switch (k->type) {
560 case KEY_RSA1:
561 case KEY_RSA:
562 return BN_num_bits(k->rsa->n);
563 break;
564 case KEY_DSA:
565 return BN_num_bits(k->dsa->p);
566 break;
567 }
568 return 0;
569}
570
571static RSA *
572rsa_generate_private_key(u_int bits)
573{
574 RSA *private;
575 private = RSA_generate_key(bits, 35, NULL, NULL);
576 if (private == NULL)
577 fatal("rsa_generate_private_key: key generation failed.");
578 return private;
579}
580
581static DSA*
582dsa_generate_private_key(u_int bits)
583{
584 DSA *private = DSA_generate_parameters(bits, NULL, 0, NULL, NULL, NULL, NULL);
585 if (private == NULL)
586 fatal("dsa_generate_private_key: DSA_generate_parameters failed");
587 if (!DSA_generate_key(private))
588 fatal("dsa_generate_private_key: DSA_generate_key failed.");
589 if (private == NULL)
590 fatal("dsa_generate_private_key: NULL.");
591 return private;
592}
593
594Key *
595key_generate(int type, u_int bits)
596{
597 Key *k = key_new(KEY_UNSPEC);
598 switch (type) {
599 case KEY_DSA:
600 k->dsa = dsa_generate_private_key(bits);
601 break;
602 case KEY_RSA:
603 case KEY_RSA1:
604 k->rsa = rsa_generate_private_key(bits);
605 break;
606 default:
607 fatal("key_generate: unknown type %d", type);
608 }
609 k->type = type;
610 return k;
611}
612
613Key *
614key_from_private(Key *k)
615{
616 Key *n = NULL;
617 switch (k->type) {
618 case KEY_DSA:
619 n = key_new(k->type);
620 BN_copy(n->dsa->p, k->dsa->p);
621 BN_copy(n->dsa->q, k->dsa->q);
622 BN_copy(n->dsa->g, k->dsa->g);
623 BN_copy(n->dsa->pub_key, k->dsa->pub_key);
624 break;
625 case KEY_RSA:
626 case KEY_RSA1:
627 n = key_new(k->type);
628 BN_copy(n->rsa->n, k->rsa->n);
629 BN_copy(n->rsa->e, k->rsa->e);
630 break;
631 default:
632 fatal("key_from_private: unknown type %d", k->type);
633 break;
634 }
635 return n;
636}
637
638int
639key_type_from_name(char *name)
640{
641 if (strcmp(name, "rsa1") == 0) {
642 return KEY_RSA1;
643 } else if (strcmp(name, "rsa") == 0) {
644 return KEY_RSA;
645 } else if (strcmp(name, "dsa") == 0) {
646 return KEY_DSA;
647 } else if (strcmp(name, "ssh-rsa") == 0) {
648 return KEY_RSA;
649 } else if (strcmp(name, "ssh-dss") == 0) {
650 return KEY_DSA;
651 }
652 debug2("key_type_from_name: unknown key type '%s'", name);
653 return KEY_UNSPEC;
654}
655
656int
657key_names_valid2(const char *names)
658{
659 char *s, *cp, *p;
660
661 if (names == NULL || strcmp(names, "") == 0)
662 return 0;
663 s = cp = xstrdup(names);
664 for ((p = strsep(&cp, ",")); p && *p != '\0';
665 (p = strsep(&cp, ","))) {
666 switch (key_type_from_name(p)) {
667 case KEY_RSA1:
668 case KEY_UNSPEC:
669 xfree(s);
670 return 0;
671 }
672 }
673 debug3("key names ok: [%s]", names);
674 xfree(s);
675 return 1;
676}
677
678Key *
679key_from_blob(u_char *blob, int blen)
680{
681 Buffer b;
682 char *ktype;
683 int rlen, type;
684 Key *key = NULL;
685
686#ifdef DEBUG_PK
687 dump_base64(stderr, blob, blen);
688#endif
689 buffer_init(&b);
690 buffer_append(&b, blob, blen);
691 ktype = buffer_get_string(&b, NULL);
692 type = key_type_from_name(ktype);
693
694 switch (type) {
695 case KEY_RSA:
696 key = key_new(type);
697 buffer_get_bignum2(&b, key->rsa->e);
698 buffer_get_bignum2(&b, key->rsa->n);
699#ifdef DEBUG_PK
700 RSA_print_fp(stderr, key->rsa, 8);
701#endif
702 break;
703 case KEY_DSA:
704 key = key_new(type);
705 buffer_get_bignum2(&b, key->dsa->p);
706 buffer_get_bignum2(&b, key->dsa->q);
707 buffer_get_bignum2(&b, key->dsa->g);
708 buffer_get_bignum2(&b, key->dsa->pub_key);
709#ifdef DEBUG_PK
710 DSA_print_fp(stderr, key->dsa, 8);
711#endif
712 break;
713 case KEY_UNSPEC:
714 key = key_new(type);
715 break;
716 default:
717 error("key_from_blob: cannot handle type %s", ktype);
718 break;
719 }
720 rlen = buffer_len(&b);
721 if (key != NULL && rlen != 0)
722 error("key_from_blob: remaining bytes in key blob %d", rlen);
723 xfree(ktype);
724 buffer_free(&b);
725 return key;
726}
727
728int
729key_to_blob(Key *key, u_char **blobp, u_int *lenp)
730{
731 Buffer b;
732 int len;
| 500
501 if (key->type == KEY_RSA1 && key->rsa != NULL) {
502 /* size of modulus 'n' */
503 bits = BN_num_bits(key->rsa->n);
504 fprintf(f, "%u", bits);
505 if (write_bignum(f, key->rsa->e) &&
506 write_bignum(f, key->rsa->n)) {
507 success = 1;
508 } else {
509 error("key_write: failed for RSA key");
510 }
511 } else if ((key->type == KEY_DSA && key->dsa != NULL) ||
512 (key->type == KEY_RSA && key->rsa != NULL)) {
513 key_to_blob(key, &blob, &len);
514 uu = xmalloc(2*len);
515 n = uuencode(blob, len, uu, 2*len);
516 if (n > 0) {
517 fprintf(f, "%s %s", key_ssh_name(key), uu);
518 success = 1;
519 }
520 xfree(blob);
521 xfree(uu);
522 }
523 return success;
524}
525
526char *
527key_type(Key *k)
528{
529 switch (k->type) {
530 case KEY_RSA1:
531 return "RSA1";
532 break;
533 case KEY_RSA:
534 return "RSA";
535 break;
536 case KEY_DSA:
537 return "DSA";
538 break;
539 }
540 return "unknown";
541}
542
543char *
544key_ssh_name(Key *k)
545{
546 switch (k->type) {
547 case KEY_RSA:
548 return "ssh-rsa";
549 break;
550 case KEY_DSA:
551 return "ssh-dss";
552 break;
553 }
554 return "ssh-unknown";
555}
556
557u_int
558key_size(Key *k)
559{
560 switch (k->type) {
561 case KEY_RSA1:
562 case KEY_RSA:
563 return BN_num_bits(k->rsa->n);
564 break;
565 case KEY_DSA:
566 return BN_num_bits(k->dsa->p);
567 break;
568 }
569 return 0;
570}
571
572static RSA *
573rsa_generate_private_key(u_int bits)
574{
575 RSA *private;
576 private = RSA_generate_key(bits, 35, NULL, NULL);
577 if (private == NULL)
578 fatal("rsa_generate_private_key: key generation failed.");
579 return private;
580}
581
582static DSA*
583dsa_generate_private_key(u_int bits)
584{
585 DSA *private = DSA_generate_parameters(bits, NULL, 0, NULL, NULL, NULL, NULL);
586 if (private == NULL)
587 fatal("dsa_generate_private_key: DSA_generate_parameters failed");
588 if (!DSA_generate_key(private))
589 fatal("dsa_generate_private_key: DSA_generate_key failed.");
590 if (private == NULL)
591 fatal("dsa_generate_private_key: NULL.");
592 return private;
593}
594
595Key *
596key_generate(int type, u_int bits)
597{
598 Key *k = key_new(KEY_UNSPEC);
599 switch (type) {
600 case KEY_DSA:
601 k->dsa = dsa_generate_private_key(bits);
602 break;
603 case KEY_RSA:
604 case KEY_RSA1:
605 k->rsa = rsa_generate_private_key(bits);
606 break;
607 default:
608 fatal("key_generate: unknown type %d", type);
609 }
610 k->type = type;
611 return k;
612}
613
614Key *
615key_from_private(Key *k)
616{
617 Key *n = NULL;
618 switch (k->type) {
619 case KEY_DSA:
620 n = key_new(k->type);
621 BN_copy(n->dsa->p, k->dsa->p);
622 BN_copy(n->dsa->q, k->dsa->q);
623 BN_copy(n->dsa->g, k->dsa->g);
624 BN_copy(n->dsa->pub_key, k->dsa->pub_key);
625 break;
626 case KEY_RSA:
627 case KEY_RSA1:
628 n = key_new(k->type);
629 BN_copy(n->rsa->n, k->rsa->n);
630 BN_copy(n->rsa->e, k->rsa->e);
631 break;
632 default:
633 fatal("key_from_private: unknown type %d", k->type);
634 break;
635 }
636 return n;
637}
638
639int
640key_type_from_name(char *name)
641{
642 if (strcmp(name, "rsa1") == 0) {
643 return KEY_RSA1;
644 } else if (strcmp(name, "rsa") == 0) {
645 return KEY_RSA;
646 } else if (strcmp(name, "dsa") == 0) {
647 return KEY_DSA;
648 } else if (strcmp(name, "ssh-rsa") == 0) {
649 return KEY_RSA;
650 } else if (strcmp(name, "ssh-dss") == 0) {
651 return KEY_DSA;
652 }
653 debug2("key_type_from_name: unknown key type '%s'", name);
654 return KEY_UNSPEC;
655}
656
657int
658key_names_valid2(const char *names)
659{
660 char *s, *cp, *p;
661
662 if (names == NULL || strcmp(names, "") == 0)
663 return 0;
664 s = cp = xstrdup(names);
665 for ((p = strsep(&cp, ",")); p && *p != '\0';
666 (p = strsep(&cp, ","))) {
667 switch (key_type_from_name(p)) {
668 case KEY_RSA1:
669 case KEY_UNSPEC:
670 xfree(s);
671 return 0;
672 }
673 }
674 debug3("key names ok: [%s]", names);
675 xfree(s);
676 return 1;
677}
678
679Key *
680key_from_blob(u_char *blob, int blen)
681{
682 Buffer b;
683 char *ktype;
684 int rlen, type;
685 Key *key = NULL;
686
687#ifdef DEBUG_PK
688 dump_base64(stderr, blob, blen);
689#endif
690 buffer_init(&b);
691 buffer_append(&b, blob, blen);
692 ktype = buffer_get_string(&b, NULL);
693 type = key_type_from_name(ktype);
694
695 switch (type) {
696 case KEY_RSA:
697 key = key_new(type);
698 buffer_get_bignum2(&b, key->rsa->e);
699 buffer_get_bignum2(&b, key->rsa->n);
700#ifdef DEBUG_PK
701 RSA_print_fp(stderr, key->rsa, 8);
702#endif
703 break;
704 case KEY_DSA:
705 key = key_new(type);
706 buffer_get_bignum2(&b, key->dsa->p);
707 buffer_get_bignum2(&b, key->dsa->q);
708 buffer_get_bignum2(&b, key->dsa->g);
709 buffer_get_bignum2(&b, key->dsa->pub_key);
710#ifdef DEBUG_PK
711 DSA_print_fp(stderr, key->dsa, 8);
712#endif
713 break;
714 case KEY_UNSPEC:
715 key = key_new(type);
716 break;
717 default:
718 error("key_from_blob: cannot handle type %s", ktype);
719 break;
720 }
721 rlen = buffer_len(&b);
722 if (key != NULL && rlen != 0)
723 error("key_from_blob: remaining bytes in key blob %d", rlen);
724 xfree(ktype);
725 buffer_free(&b);
726 return key;
727}
728
729int
730key_to_blob(Key *key, u_char **blobp, u_int *lenp)
731{
732 Buffer b;
733 int len;
|
733 u_char *buf;
| |
734
735 if (key == NULL) {
736 error("key_to_blob: key == NULL");
737 return 0;
738 }
739 buffer_init(&b);
740 switch (key->type) {
741 case KEY_DSA:
742 buffer_put_cstring(&b, key_ssh_name(key));
743 buffer_put_bignum2(&b, key->dsa->p);
744 buffer_put_bignum2(&b, key->dsa->q);
745 buffer_put_bignum2(&b, key->dsa->g);
746 buffer_put_bignum2(&b, key->dsa->pub_key);
747 break;
748 case KEY_RSA:
749 buffer_put_cstring(&b, key_ssh_name(key));
750 buffer_put_bignum2(&b, key->rsa->e);
751 buffer_put_bignum2(&b, key->rsa->n);
752 break;
753 default:
754 error("key_to_blob: unsupported key type %d", key->type);
755 buffer_free(&b);
756 return 0;
757 }
758 len = buffer_len(&b);
| 734
735 if (key == NULL) {
736 error("key_to_blob: key == NULL");
737 return 0;
738 }
739 buffer_init(&b);
740 switch (key->type) {
741 case KEY_DSA:
742 buffer_put_cstring(&b, key_ssh_name(key));
743 buffer_put_bignum2(&b, key->dsa->p);
744 buffer_put_bignum2(&b, key->dsa->q);
745 buffer_put_bignum2(&b, key->dsa->g);
746 buffer_put_bignum2(&b, key->dsa->pub_key);
747 break;
748 case KEY_RSA:
749 buffer_put_cstring(&b, key_ssh_name(key));
750 buffer_put_bignum2(&b, key->rsa->e);
751 buffer_put_bignum2(&b, key->rsa->n);
752 break;
753 default:
754 error("key_to_blob: unsupported key type %d", key->type);
755 buffer_free(&b);
756 return 0;
757 }
758 len = buffer_len(&b);
|
759 buf = xmalloc(len);
760 memcpy(buf, buffer_ptr(&b), len);
761 memset(buffer_ptr(&b), 0, len);
762 buffer_free(&b);
| |
763 if (lenp != NULL)
764 *lenp = len;
| 759 if (lenp != NULL)
760 *lenp = len;
|
765 if (blobp != NULL)
766 *blobp = buf;
| 761 if (blobp != NULL) {
762 *blobp = xmalloc(len);
763 memcpy(*blobp, buffer_ptr(&b), len);
764 }
765 memset(buffer_ptr(&b), 0, len);
766 buffer_free(&b);
|
767 return len;
768}
769
770int
771key_sign(
772 Key *key,
773 u_char **sigp, u_int *lenp,
774 u_char *data, u_int datalen)
775{
776 switch (key->type) {
777 case KEY_DSA:
778 return ssh_dss_sign(key, sigp, lenp, data, datalen);
779 break;
780 case KEY_RSA:
781 return ssh_rsa_sign(key, sigp, lenp, data, datalen);
782 break;
783 default:
784 error("key_sign: illegal key type %d", key->type);
785 return -1;
786 break;
787 }
788}
789
790/*
791 * key_verify returns 1 for a correct signature, 0 for an incorrect signature
792 * and -1 on error.
793 */
794int
795key_verify(
796 Key *key,
797 u_char *signature, u_int signaturelen,
798 u_char *data, u_int datalen)
799{
800 if (signaturelen == 0)
801 return -1;
802
803 switch (key->type) {
804 case KEY_DSA:
805 return ssh_dss_verify(key, signature, signaturelen, data, datalen);
806 break;
807 case KEY_RSA:
808 return ssh_rsa_verify(key, signature, signaturelen, data, datalen);
809 break;
810 default:
811 error("key_verify: illegal key type %d", key->type);
812 return -1;
813 break;
814 }
815}
816
817/* Converts a private to a public key */
818Key *
819key_demote(Key *k)
820{
821 Key *pk;
822
823 pk = xmalloc(sizeof(*pk));
824 pk->type = k->type;
825 pk->flags = k->flags;
826 pk->dsa = NULL;
827 pk->rsa = NULL;
828
829 switch (k->type) {
830 case KEY_RSA1:
831 case KEY_RSA:
832 if ((pk->rsa = RSA_new()) == NULL)
833 fatal("key_demote: RSA_new failed");
834 if ((pk->rsa->e = BN_dup(k->rsa->e)) == NULL)
835 fatal("key_demote: BN_dup failed");
836 if ((pk->rsa->n = BN_dup(k->rsa->n)) == NULL)
837 fatal("key_demote: BN_dup failed");
838 break;
839 case KEY_DSA:
840 if ((pk->dsa = DSA_new()) == NULL)
841 fatal("key_demote: DSA_new failed");
842 if ((pk->dsa->p = BN_dup(k->dsa->p)) == NULL)
843 fatal("key_demote: BN_dup failed");
844 if ((pk->dsa->q = BN_dup(k->dsa->q)) == NULL)
845 fatal("key_demote: BN_dup failed");
846 if ((pk->dsa->g = BN_dup(k->dsa->g)) == NULL)
847 fatal("key_demote: BN_dup failed");
848 if ((pk->dsa->pub_key = BN_dup(k->dsa->pub_key)) == NULL)
849 fatal("key_demote: BN_dup failed");
850 break;
851 default:
852 fatal("key_free: bad key type %d", k->type);
853 break;
854 }
855
856 return (pk);
857}
| 767 return len;
768}
769
770int
771key_sign(
772 Key *key,
773 u_char **sigp, u_int *lenp,
774 u_char *data, u_int datalen)
775{
776 switch (key->type) {
777 case KEY_DSA:
778 return ssh_dss_sign(key, sigp, lenp, data, datalen);
779 break;
780 case KEY_RSA:
781 return ssh_rsa_sign(key, sigp, lenp, data, datalen);
782 break;
783 default:
784 error("key_sign: illegal key type %d", key->type);
785 return -1;
786 break;
787 }
788}
789
790/*
791 * key_verify returns 1 for a correct signature, 0 for an incorrect signature
792 * and -1 on error.
793 */
794int
795key_verify(
796 Key *key,
797 u_char *signature, u_int signaturelen,
798 u_char *data, u_int datalen)
799{
800 if (signaturelen == 0)
801 return -1;
802
803 switch (key->type) {
804 case KEY_DSA:
805 return ssh_dss_verify(key, signature, signaturelen, data, datalen);
806 break;
807 case KEY_RSA:
808 return ssh_rsa_verify(key, signature, signaturelen, data, datalen);
809 break;
810 default:
811 error("key_verify: illegal key type %d", key->type);
812 return -1;
813 break;
814 }
815}
816
817/* Converts a private to a public key */
818Key *
819key_demote(Key *k)
820{
821 Key *pk;
822
823 pk = xmalloc(sizeof(*pk));
824 pk->type = k->type;
825 pk->flags = k->flags;
826 pk->dsa = NULL;
827 pk->rsa = NULL;
828
829 switch (k->type) {
830 case KEY_RSA1:
831 case KEY_RSA:
832 if ((pk->rsa = RSA_new()) == NULL)
833 fatal("key_demote: RSA_new failed");
834 if ((pk->rsa->e = BN_dup(k->rsa->e)) == NULL)
835 fatal("key_demote: BN_dup failed");
836 if ((pk->rsa->n = BN_dup(k->rsa->n)) == NULL)
837 fatal("key_demote: BN_dup failed");
838 break;
839 case KEY_DSA:
840 if ((pk->dsa = DSA_new()) == NULL)
841 fatal("key_demote: DSA_new failed");
842 if ((pk->dsa->p = BN_dup(k->dsa->p)) == NULL)
843 fatal("key_demote: BN_dup failed");
844 if ((pk->dsa->q = BN_dup(k->dsa->q)) == NULL)
845 fatal("key_demote: BN_dup failed");
846 if ((pk->dsa->g = BN_dup(k->dsa->g)) == NULL)
847 fatal("key_demote: BN_dup failed");
848 if ((pk->dsa->pub_key = BN_dup(k->dsa->pub_key)) == NULL)
849 fatal("key_demote: BN_dup failed");
850 break;
851 default:
852 fatal("key_free: bad key type %d", k->type);
853 break;
854 }
855
856 return (pk);
857}
|