File: | src/lib/libcrypto/pem/pvkfmt.c |
Warning: | line 931, column 11 Potential leak of memory pointed to by 'tmp' |
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1 | /* $OpenBSD: pvkfmt.c,v 1.27 2023/07/07 13:40:44 beck Exp $ */ | |||
2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |||
3 | * project 2005. | |||
4 | */ | |||
5 | /* ==================================================================== | |||
6 | * Copyright (c) 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 | * licensing@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 | /* Support for PVK format keys and related structures (such a PUBLICKEYBLOB | |||
60 | * and PRIVATEKEYBLOB). | |||
61 | */ | |||
62 | ||||
63 | #include <stdlib.h> | |||
64 | #include <string.h> | |||
65 | ||||
66 | #include <openssl/opensslconf.h> | |||
67 | ||||
68 | #include <openssl/bn.h> | |||
69 | #include <openssl/err.h> | |||
70 | #include <openssl/pem.h> | |||
71 | ||||
72 | #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA) | |||
73 | #include <openssl/dsa.h> | |||
74 | #include <openssl/rsa.h> | |||
75 | ||||
76 | #include "bn_local.h" | |||
77 | #include "dsa_local.h" | |||
78 | #include "evp_local.h" | |||
79 | #include "rsa_local.h" | |||
80 | ||||
81 | /* Utility function: read a DWORD (4 byte unsigned integer) in little endian | |||
82 | * format | |||
83 | */ | |||
84 | ||||
85 | static unsigned int | |||
86 | read_ledword(const unsigned char **in) | |||
87 | { | |||
88 | const unsigned char *p = *in; | |||
89 | unsigned int ret; | |||
90 | ||||
91 | ret = *p++; | |||
92 | ret |= (*p++ << 8); | |||
93 | ret |= (*p++ << 16); | |||
94 | ret |= (*p++ << 24); | |||
95 | *in = p; | |||
96 | return ret; | |||
97 | } | |||
98 | ||||
99 | /* Read a BIGNUM in little endian format. The docs say that this should take up | |||
100 | * bitlen/8 bytes. | |||
101 | */ | |||
102 | ||||
103 | static int | |||
104 | read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r) | |||
105 | { | |||
106 | const unsigned char *p; | |||
107 | unsigned char *tmpbuf, *q; | |||
108 | unsigned int i; | |||
109 | ||||
110 | p = *in + nbyte - 1; | |||
111 | tmpbuf = malloc(nbyte); | |||
112 | if (!tmpbuf) | |||
113 | return 0; | |||
114 | q = tmpbuf; | |||
115 | for (i = 0; i < nbyte; i++) | |||
116 | *q++ = *p--; | |||
117 | *r = BN_bin2bn(tmpbuf, nbyte, NULL((void *)0)); | |||
118 | free(tmpbuf); | |||
119 | if (*r) { | |||
120 | *in += nbyte; | |||
121 | return 1; | |||
122 | } else | |||
123 | return 0; | |||
124 | } | |||
125 | ||||
126 | ||||
127 | /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */ | |||
128 | ||||
129 | #define MS_PUBLICKEYBLOB0x6 0x6 | |||
130 | #define MS_PRIVATEKEYBLOB0x7 0x7 | |||
131 | #define MS_RSA1MAGIC0x31415352L 0x31415352L | |||
132 | #define MS_RSA2MAGIC0x32415352L 0x32415352L | |||
133 | #define MS_DSS1MAGIC0x31535344L 0x31535344L | |||
134 | #define MS_DSS2MAGIC0x32535344L 0x32535344L | |||
135 | ||||
136 | #define MS_KEYALG_RSA_KEYX0xa400 0xa400 | |||
137 | #define MS_KEYALG_DSS_SIGN0x2200 0x2200 | |||
138 | ||||
139 | #define MS_KEYTYPE_KEYX0x1 0x1 | |||
140 | #define MS_KEYTYPE_SIGN0x2 0x2 | |||
141 | ||||
142 | /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */ | |||
143 | #define MS_PVKMAGIC0xb0b5f11eL 0xb0b5f11eL | |||
144 | /* Salt length for PVK files */ | |||
145 | #define PVK_SALTLEN0x10 0x10 | |||
146 | ||||
147 | static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length, | |||
148 | unsigned int bitlen, int ispub); | |||
149 | static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length, | |||
150 | unsigned int bitlen, int ispub); | |||
151 | ||||
152 | static int | |||
153 | do_blob_header(const unsigned char **in, unsigned int length, | |||
154 | unsigned int *pmagic, unsigned int *pbitlen, int *pisdss, int *pispub) | |||
155 | { | |||
156 | const unsigned char *p = *in; | |||
157 | ||||
158 | if (length < 16) | |||
159 | return 0; | |||
160 | /* bType */ | |||
161 | if (*p == MS_PUBLICKEYBLOB0x6) { | |||
162 | if (*pispub == 0) { | |||
163 | PEMerror(PEM_R_EXPECTING_PRIVATE_KEY_BLOB)ERR_put_error(9,(0xfff),(119),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,163); | |||
164 | return 0; | |||
165 | } | |||
166 | *pispub = 1; | |||
167 | } else if (*p == MS_PRIVATEKEYBLOB0x7) { | |||
168 | if (*pispub == 1) { | |||
169 | PEMerror(PEM_R_EXPECTING_PUBLIC_KEY_BLOB)ERR_put_error(9,(0xfff),(120),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,169); | |||
170 | return 0; | |||
171 | } | |||
172 | *pispub = 0; | |||
173 | } else | |||
174 | return 0; | |||
175 | p++; | |||
176 | /* Version */ | |||
177 | if (*p++ != 0x2) { | |||
178 | PEMerror(PEM_R_BAD_VERSION_NUMBER)ERR_put_error(9,(0xfff),(117),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,178); | |||
179 | return 0; | |||
180 | } | |||
181 | /* Ignore reserved, aiKeyAlg */ | |||
182 | p += 6; | |||
183 | *pmagic = read_ledword(&p); | |||
184 | *pbitlen = read_ledword(&p); | |||
185 | if (*pbitlen > 65536) { | |||
186 | PEMerror(PEM_R_INCONSISTENT_HEADER)ERR_put_error(9,(0xfff),(121),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,186); | |||
187 | return 0; | |||
188 | } | |||
189 | *pisdss = 0; | |||
190 | switch (*pmagic) { | |||
191 | ||||
192 | case MS_DSS1MAGIC0x31535344L: | |||
193 | *pisdss = 1; | |||
194 | case MS_RSA1MAGIC0x31415352L: | |||
195 | if (*pispub == 0) { | |||
196 | PEMerror(PEM_R_EXPECTING_PRIVATE_KEY_BLOB)ERR_put_error(9,(0xfff),(119),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,196); | |||
197 | return 0; | |||
198 | } | |||
199 | break; | |||
200 | ||||
201 | case MS_DSS2MAGIC0x32535344L: | |||
202 | *pisdss = 1; | |||
203 | case MS_RSA2MAGIC0x32415352L: | |||
204 | if (*pispub == 1) { | |||
205 | PEMerror(PEM_R_EXPECTING_PUBLIC_KEY_BLOB)ERR_put_error(9,(0xfff),(120),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,205); | |||
206 | return 0; | |||
207 | } | |||
208 | break; | |||
209 | ||||
210 | default: | |||
211 | PEMerror(PEM_R_BAD_MAGIC_NUMBER)ERR_put_error(9,(0xfff),(116),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,211); | |||
212 | return -1; | |||
213 | } | |||
214 | *in = p; | |||
215 | return 1; | |||
216 | } | |||
217 | ||||
218 | static unsigned int | |||
219 | blob_length(unsigned bitlen, int isdss, int ispub) | |||
220 | { | |||
221 | unsigned int nbyte, hnbyte; | |||
222 | ||||
223 | nbyte = (bitlen + 7) >> 3; | |||
224 | hnbyte = (bitlen + 15) >> 4; | |||
225 | if (isdss) { | |||
226 | ||||
227 | /* Expected length: 20 for q + 3 components bitlen each + 24 | |||
228 | * for seed structure. | |||
229 | */ | |||
230 | if (ispub) | |||
231 | return 44 + 3 * nbyte; | |||
232 | /* Expected length: 20 for q, priv, 2 bitlen components + 24 | |||
233 | * for seed structure. | |||
234 | */ | |||
235 | else | |||
236 | return 64 + 2 * nbyte; | |||
237 | } else { | |||
238 | /* Expected length: 4 for 'e' + 'n' */ | |||
239 | if (ispub) | |||
240 | return 4 + nbyte; | |||
241 | else | |||
242 | /* Expected length: 4 for 'e' and 7 other components. | |||
243 | * 2 components are bitlen size, 5 are bitlen/2 | |||
244 | */ | |||
245 | return 4 + 2*nbyte + 5*hnbyte; | |||
246 | } | |||
247 | ||||
248 | } | |||
249 | ||||
250 | static EVP_PKEY * | |||
251 | do_b2i(const unsigned char **in, unsigned int length, int ispub) | |||
252 | { | |||
253 | const unsigned char *p = *in; | |||
254 | unsigned int bitlen, magic; | |||
255 | int isdss; | |||
256 | ||||
257 | if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) { | |||
258 | PEMerror(PEM_R_KEYBLOB_HEADER_PARSE_ERROR)ERR_put_error(9,(0xfff),(122),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,258); | |||
259 | return NULL((void *)0); | |||
260 | } | |||
261 | length -= 16; | |||
262 | if (length < blob_length(bitlen, isdss, ispub)) { | |||
263 | PEMerror(PEM_R_KEYBLOB_TOO_SHORT)ERR_put_error(9,(0xfff),(123),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,263); | |||
264 | return NULL((void *)0); | |||
265 | } | |||
266 | if (isdss) | |||
267 | return b2i_dss(&p, length, bitlen, ispub); | |||
268 | else | |||
269 | return b2i_rsa(&p, length, bitlen, ispub); | |||
270 | } | |||
271 | ||||
272 | static EVP_PKEY * | |||
273 | do_b2i_bio(BIO *in, int ispub) | |||
274 | { | |||
275 | const unsigned char *p; | |||
276 | unsigned char hdr_buf[16], *buf = NULL((void *)0); | |||
277 | unsigned int bitlen, magic, length; | |||
278 | int isdss; | |||
279 | EVP_PKEY *ret = NULL((void *)0); | |||
280 | ||||
281 | if (BIO_read(in, hdr_buf, 16) != 16) { | |||
282 | PEMerror(PEM_R_KEYBLOB_TOO_SHORT)ERR_put_error(9,(0xfff),(123),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,282); | |||
283 | return NULL((void *)0); | |||
284 | } | |||
285 | p = hdr_buf; | |||
286 | if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0) | |||
287 | return NULL((void *)0); | |||
288 | ||||
289 | length = blob_length(bitlen, isdss, ispub); | |||
290 | buf = malloc(length); | |||
291 | if (!buf) { | |||
292 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,292); | |||
293 | goto err; | |||
294 | } | |||
295 | p = buf; | |||
296 | if (BIO_read(in, buf, length) != (int)length) { | |||
297 | PEMerror(PEM_R_KEYBLOB_TOO_SHORT)ERR_put_error(9,(0xfff),(123),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,297); | |||
298 | goto err; | |||
299 | } | |||
300 | ||||
301 | if (isdss) | |||
302 | ret = b2i_dss(&p, length, bitlen, ispub); | |||
303 | else | |||
304 | ret = b2i_rsa(&p, length, bitlen, ispub); | |||
305 | ||||
306 | err: | |||
307 | free(buf); | |||
308 | return ret; | |||
309 | } | |||
310 | ||||
311 | static EVP_PKEY * | |||
312 | b2i_dss(const unsigned char **in, unsigned int length, unsigned int bitlen, | |||
313 | int ispub) | |||
314 | { | |||
315 | const unsigned char *p = *in; | |||
316 | EVP_PKEY *ret = NULL((void *)0); | |||
317 | DSA *dsa = NULL((void *)0); | |||
318 | BN_CTX *ctx = NULL((void *)0); | |||
319 | unsigned int nbyte; | |||
320 | ||||
321 | nbyte = (bitlen + 7) >> 3; | |||
322 | ||||
323 | dsa = DSA_new(); | |||
324 | ret = EVP_PKEY_new(); | |||
325 | if (!dsa || !ret) | |||
326 | goto err; | |||
327 | if (!read_lebn(&p, nbyte, &dsa->p)) | |||
328 | goto err; | |||
329 | if (!read_lebn(&p, 20, &dsa->q)) | |||
330 | goto err; | |||
331 | if (!read_lebn(&p, nbyte, &dsa->g)) | |||
332 | goto err; | |||
333 | if (ispub) { | |||
334 | if (!read_lebn(&p, nbyte, &dsa->pub_key)) | |||
335 | goto err; | |||
336 | } else { | |||
337 | if (!read_lebn(&p, 20, &dsa->priv_key)) | |||
338 | goto err; | |||
339 | /* Calculate public key */ | |||
340 | if (!(dsa->pub_key = BN_new())) | |||
341 | goto err; | |||
342 | if (!(ctx = BN_CTX_new())) | |||
343 | goto err; | |||
344 | if (!BN_mod_exp_ct(dsa->pub_key, dsa->g, | |||
345 | dsa->priv_key, dsa->p, ctx)) | |||
346 | goto err; | |||
347 | BN_CTX_free(ctx); | |||
348 | } | |||
349 | ||||
350 | EVP_PKEY_set1_DSA(ret, dsa); | |||
351 | DSA_free(dsa); | |||
352 | *in = p; | |||
353 | return ret; | |||
354 | ||||
355 | err: | |||
356 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,356); | |||
357 | DSA_free(dsa); | |||
358 | EVP_PKEY_free(ret); | |||
359 | BN_CTX_free(ctx); | |||
360 | return NULL((void *)0); | |||
361 | } | |||
362 | ||||
363 | static EVP_PKEY * | |||
364 | b2i_rsa(const unsigned char **in, unsigned int length, unsigned int bitlen, | |||
365 | int ispub) | |||
366 | { | |||
367 | const unsigned char *p = *in; | |||
368 | EVP_PKEY *ret = NULL((void *)0); | |||
369 | RSA *rsa = NULL((void *)0); | |||
370 | unsigned int nbyte, hnbyte; | |||
371 | ||||
372 | nbyte = (bitlen + 7) >> 3; | |||
373 | hnbyte = (bitlen + 15) >> 4; | |||
374 | rsa = RSA_new(); | |||
375 | ret = EVP_PKEY_new(); | |||
376 | if (!rsa || !ret) | |||
377 | goto err; | |||
378 | rsa->e = BN_new(); | |||
379 | if (!rsa->e) | |||
380 | goto err; | |||
381 | if (!BN_set_word(rsa->e, read_ledword(&p))) | |||
382 | goto err; | |||
383 | if (!read_lebn(&p, nbyte, &rsa->n)) | |||
384 | goto err; | |||
385 | if (!ispub) { | |||
386 | if (!read_lebn(&p, hnbyte, &rsa->p)) | |||
387 | goto err; | |||
388 | if (!read_lebn(&p, hnbyte, &rsa->q)) | |||
389 | goto err; | |||
390 | if (!read_lebn(&p, hnbyte, &rsa->dmp1)) | |||
391 | goto err; | |||
392 | if (!read_lebn(&p, hnbyte, &rsa->dmq1)) | |||
393 | goto err; | |||
394 | if (!read_lebn(&p, hnbyte, &rsa->iqmp)) | |||
395 | goto err; | |||
396 | if (!read_lebn(&p, nbyte, &rsa->d)) | |||
397 | goto err; | |||
398 | } | |||
399 | ||||
400 | EVP_PKEY_set1_RSA(ret, rsa); | |||
401 | RSA_free(rsa); | |||
402 | *in = p; | |||
403 | return ret; | |||
404 | ||||
405 | err: | |||
406 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,406); | |||
407 | RSA_free(rsa); | |||
408 | EVP_PKEY_free(ret); | |||
409 | return NULL((void *)0); | |||
410 | } | |||
411 | ||||
412 | EVP_PKEY * | |||
413 | b2i_PrivateKey(const unsigned char **in, long length) | |||
414 | { | |||
415 | return do_b2i(in, length, 0); | |||
416 | } | |||
417 | LCRYPTO_ALIAS(b2i_PrivateKey)asm(""); | |||
418 | ||||
419 | EVP_PKEY * | |||
420 | b2i_PublicKey(const unsigned char **in, long length) | |||
421 | { | |||
422 | return do_b2i(in, length, 1); | |||
423 | } | |||
424 | LCRYPTO_ALIAS(b2i_PublicKey)asm(""); | |||
425 | ||||
426 | EVP_PKEY * | |||
427 | b2i_PrivateKey_bio(BIO *in) | |||
428 | { | |||
429 | return do_b2i_bio(in, 0); | |||
430 | } | |||
431 | LCRYPTO_ALIAS(b2i_PrivateKey_bio)asm(""); | |||
432 | ||||
433 | EVP_PKEY * | |||
434 | b2i_PublicKey_bio(BIO *in) | |||
435 | { | |||
436 | return do_b2i_bio(in, 1); | |||
437 | } | |||
438 | LCRYPTO_ALIAS(b2i_PublicKey_bio)asm(""); | |||
439 | ||||
440 | static void | |||
441 | write_ledword(unsigned char **out, unsigned int dw) | |||
442 | { | |||
443 | unsigned char *p = *out; | |||
444 | ||||
445 | *p++ = dw & 0xff; | |||
446 | *p++ = (dw >> 8) & 0xff; | |||
447 | *p++ = (dw >> 16) & 0xff; | |||
448 | *p++ = (dw >> 24) & 0xff; | |||
449 | *out = p; | |||
450 | } | |||
451 | ||||
452 | static void | |||
453 | write_lebn(unsigned char **out, const BIGNUM *bn, int len) | |||
454 | { | |||
455 | int nb, i; | |||
456 | unsigned char *p = *out, *q, c; | |||
457 | ||||
458 | nb = BN_num_bytes(bn)((BN_num_bits(bn)+7)/8); | |||
459 | BN_bn2bin(bn, p); | |||
460 | q = p + nb - 1; | |||
461 | /* In place byte order reversal */ | |||
462 | for (i = 0; i < nb / 2; i++) { | |||
463 | c = *p; | |||
464 | *p++ = *q; | |||
465 | *q-- = c; | |||
466 | } | |||
467 | *out += nb; | |||
468 | /* Pad with zeroes if we have to */ | |||
469 | if (len > 0) { | |||
470 | len -= nb; | |||
471 | if (len > 0) { | |||
472 | memset(*out, 0, len); | |||
473 | *out += len; | |||
474 | } | |||
475 | } | |||
476 | } | |||
477 | ||||
478 | ||||
479 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic); | |||
480 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic); | |||
481 | ||||
482 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub); | |||
483 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub); | |||
484 | ||||
485 | static int | |||
486 | do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub) | |||
487 | { | |||
488 | unsigned char *p; | |||
489 | unsigned int bitlen, magic = 0, keyalg; | |||
490 | int outlen, noinc = 0; | |||
491 | ||||
492 | if (pk->type == EVP_PKEY_DSA116) { | |||
493 | bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic); | |||
494 | keyalg = MS_KEYALG_DSS_SIGN0x2200; | |||
495 | } else if (pk->type == EVP_PKEY_RSA6) { | |||
496 | bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic); | |||
497 | keyalg = MS_KEYALG_RSA_KEYX0xa400; | |||
498 | } else | |||
499 | return -1; | |||
500 | if (bitlen == 0) | |||
501 | return -1; | |||
502 | outlen = 16 + blob_length(bitlen, | |||
503 | keyalg == MS_KEYALG_DSS_SIGN0x2200 ? 1 : 0, ispub); | |||
504 | if (out == NULL((void *)0)) | |||
505 | return outlen; | |||
506 | if (*out) | |||
507 | p = *out; | |||
508 | else { | |||
509 | p = malloc(outlen); | |||
510 | if (!p) | |||
511 | return -1; | |||
512 | *out = p; | |||
513 | noinc = 1; | |||
514 | } | |||
515 | if (ispub) | |||
516 | *p++ = MS_PUBLICKEYBLOB0x6; | |||
517 | else | |||
518 | *p++ = MS_PRIVATEKEYBLOB0x7; | |||
519 | *p++ = 0x2; | |||
520 | *p++ = 0; | |||
521 | *p++ = 0; | |||
522 | write_ledword(&p, keyalg); | |||
523 | write_ledword(&p, magic); | |||
524 | write_ledword(&p, bitlen); | |||
525 | if (keyalg == MS_KEYALG_DSS_SIGN0x2200) | |||
526 | write_dsa(&p, pk->pkey.dsa, ispub); | |||
527 | else | |||
528 | write_rsa(&p, pk->pkey.rsa, ispub); | |||
529 | if (!noinc) | |||
530 | *out += outlen; | |||
531 | return outlen; | |||
532 | } | |||
533 | ||||
534 | static int | |||
535 | do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub) | |||
536 | { | |||
537 | unsigned char *tmp = NULL((void *)0); | |||
538 | int outlen, wrlen; | |||
539 | ||||
540 | outlen = do_i2b(&tmp, pk, ispub); | |||
541 | if (outlen < 0) | |||
542 | return -1; | |||
543 | wrlen = BIO_write(out, tmp, outlen); | |||
544 | free(tmp); | |||
545 | if (wrlen == outlen) | |||
546 | return outlen; | |||
547 | return -1; | |||
548 | } | |||
549 | ||||
550 | static int | |||
551 | check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic) | |||
552 | { | |||
553 | int bitlen; | |||
554 | ||||
555 | bitlen = BN_num_bits(dsa->p); | |||
556 | if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160) || | |||
557 | (BN_num_bits(dsa->g) > bitlen)) | |||
558 | goto err; | |||
559 | if (ispub) { | |||
560 | if (BN_num_bits(dsa->pub_key) > bitlen) | |||
561 | goto err; | |||
562 | *pmagic = MS_DSS1MAGIC0x31535344L; | |||
563 | } else { | |||
564 | if (BN_num_bits(dsa->priv_key) > 160) | |||
565 | goto err; | |||
566 | *pmagic = MS_DSS2MAGIC0x32535344L; | |||
567 | } | |||
568 | ||||
569 | return bitlen; | |||
570 | ||||
571 | err: | |||
572 | PEMerror(PEM_R_UNSUPPORTED_KEY_COMPONENTS)ERR_put_error(9,(0xfff),(126),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,572); | |||
573 | return 0; | |||
574 | } | |||
575 | ||||
576 | static int | |||
577 | check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic) | |||
578 | { | |||
579 | int nbyte, hnbyte, bitlen; | |||
580 | ||||
581 | if (BN_num_bits(rsa->e) > 32) | |||
582 | goto err; | |||
583 | bitlen = BN_num_bits(rsa->n); | |||
584 | nbyte = BN_num_bytes(rsa->n)((BN_num_bits(rsa->n)+7)/8); | |||
585 | hnbyte = (BN_num_bits(rsa->n) + 15) >> 4; | |||
586 | if (ispub) { | |||
587 | *pmagic = MS_RSA1MAGIC0x31415352L; | |||
588 | return bitlen; | |||
589 | } else { | |||
590 | *pmagic = MS_RSA2MAGIC0x32415352L; | |||
591 | /* For private key each component must fit within nbyte or | |||
592 | * hnbyte. | |||
593 | */ | |||
594 | if (BN_num_bytes(rsa->d)((BN_num_bits(rsa->d)+7)/8) > nbyte) | |||
595 | goto err; | |||
596 | if ((BN_num_bytes(rsa->iqmp)((BN_num_bits(rsa->iqmp)+7)/8) > hnbyte) || | |||
597 | (BN_num_bytes(rsa->p)((BN_num_bits(rsa->p)+7)/8) > hnbyte) || | |||
598 | (BN_num_bytes(rsa->q)((BN_num_bits(rsa->q)+7)/8) > hnbyte) || | |||
599 | (BN_num_bytes(rsa->dmp1)((BN_num_bits(rsa->dmp1)+7)/8) > hnbyte) || | |||
600 | (BN_num_bytes(rsa->dmq1)((BN_num_bits(rsa->dmq1)+7)/8) > hnbyte)) | |||
601 | goto err; | |||
602 | } | |||
603 | return bitlen; | |||
604 | ||||
605 | err: | |||
606 | PEMerror(PEM_R_UNSUPPORTED_KEY_COMPONENTS)ERR_put_error(9,(0xfff),(126),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,606); | |||
607 | return 0; | |||
608 | } | |||
609 | ||||
610 | static void | |||
611 | write_rsa(unsigned char **out, RSA *rsa, int ispub) | |||
612 | { | |||
613 | int nbyte, hnbyte; | |||
614 | ||||
615 | nbyte = BN_num_bytes(rsa->n)((BN_num_bits(rsa->n)+7)/8); | |||
616 | hnbyte = (BN_num_bits(rsa->n) + 15) >> 4; | |||
617 | write_lebn(out, rsa->e, 4); | |||
618 | write_lebn(out, rsa->n, -1); | |||
619 | if (ispub) | |||
620 | return; | |||
621 | write_lebn(out, rsa->p, hnbyte); | |||
622 | write_lebn(out, rsa->q, hnbyte); | |||
623 | write_lebn(out, rsa->dmp1, hnbyte); | |||
624 | write_lebn(out, rsa->dmq1, hnbyte); | |||
625 | write_lebn(out, rsa->iqmp, hnbyte); | |||
626 | write_lebn(out, rsa->d, nbyte); | |||
627 | } | |||
628 | ||||
629 | static void | |||
630 | write_dsa(unsigned char **out, DSA *dsa, int ispub) | |||
631 | { | |||
632 | int nbyte; | |||
633 | ||||
634 | nbyte = BN_num_bytes(dsa->p)((BN_num_bits(dsa->p)+7)/8); | |||
635 | write_lebn(out, dsa->p, nbyte); | |||
636 | write_lebn(out, dsa->q, 20); | |||
637 | write_lebn(out, dsa->g, nbyte); | |||
638 | if (ispub) | |||
639 | write_lebn(out, dsa->pub_key, nbyte); | |||
640 | else | |||
641 | write_lebn(out, dsa->priv_key, 20); | |||
642 | /* Set "invalid" for seed structure values */ | |||
643 | memset(*out, 0xff, 24); | |||
644 | *out += 24; | |||
645 | return; | |||
646 | } | |||
647 | ||||
648 | int | |||
649 | i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk) | |||
650 | { | |||
651 | return do_i2b_bio(out, pk, 0); | |||
652 | } | |||
653 | LCRYPTO_ALIAS(i2b_PrivateKey_bio)asm(""); | |||
654 | ||||
655 | int | |||
656 | i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk) | |||
657 | { | |||
658 | return do_i2b_bio(out, pk, 1); | |||
659 | } | |||
660 | LCRYPTO_ALIAS(i2b_PublicKey_bio)asm(""); | |||
661 | ||||
662 | #ifndef OPENSSL_NO_RC4 | |||
663 | ||||
664 | static int | |||
665 | do_PVK_header(const unsigned char **in, unsigned int length, int skip_magic, | |||
666 | unsigned int *psaltlen, unsigned int *pkeylen) | |||
667 | { | |||
668 | const unsigned char *p = *in; | |||
669 | unsigned int pvk_magic, is_encrypted; | |||
670 | ||||
671 | if (skip_magic) { | |||
672 | if (length < 20) { | |||
673 | PEMerror(PEM_R_PVK_TOO_SHORT)ERR_put_error(9,(0xfff),(125),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,673); | |||
674 | return 0; | |||
675 | } | |||
676 | length -= 20; | |||
677 | } else { | |||
678 | if (length < 24) { | |||
679 | PEMerror(PEM_R_PVK_TOO_SHORT)ERR_put_error(9,(0xfff),(125),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,679); | |||
680 | return 0; | |||
681 | } | |||
682 | length -= 24; | |||
683 | pvk_magic = read_ledword(&p); | |||
684 | if (pvk_magic != MS_PVKMAGIC0xb0b5f11eL) { | |||
685 | PEMerror(PEM_R_BAD_MAGIC_NUMBER)ERR_put_error(9,(0xfff),(116),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,685); | |||
686 | return 0; | |||
687 | } | |||
688 | } | |||
689 | /* Skip reserved */ | |||
690 | p += 4; | |||
691 | /*keytype = */read_ledword(&p); | |||
692 | is_encrypted = read_ledword(&p); | |||
693 | *psaltlen = read_ledword(&p); | |||
694 | *pkeylen = read_ledword(&p); | |||
695 | if (*psaltlen > 65536 || *pkeylen > 65536) { | |||
696 | PEMerror(PEM_R_ERROR_CONVERTING_PRIVATE_KEY)ERR_put_error(9,(0xfff),(115),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,696); | |||
697 | return 0; | |||
698 | } | |||
699 | ||||
700 | if (is_encrypted && !*psaltlen) { | |||
701 | PEMerror(PEM_R_INCONSISTENT_HEADER)ERR_put_error(9,(0xfff),(121),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,701); | |||
702 | return 0; | |||
703 | } | |||
704 | ||||
705 | *in = p; | |||
706 | return 1; | |||
707 | } | |||
708 | ||||
709 | static int | |||
710 | derive_pvk_key(unsigned char *key, const unsigned char *salt, | |||
711 | unsigned int saltlen, const unsigned char *pass, int passlen) | |||
712 | { | |||
713 | EVP_MD_CTX mctx; | |||
714 | int rv = 1; | |||
715 | ||||
716 | EVP_MD_CTX_init(&mctx); | |||
717 | if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL((void *)0)) || | |||
718 | !EVP_DigestUpdate(&mctx, salt, saltlen) || | |||
719 | !EVP_DigestUpdate(&mctx, pass, passlen) || | |||
720 | !EVP_DigestFinal_ex(&mctx, key, NULL((void *)0))) | |||
721 | rv = 0; | |||
722 | ||||
723 | EVP_MD_CTX_cleanup(&mctx); | |||
724 | return rv; | |||
725 | } | |||
726 | ||||
727 | static EVP_PKEY * | |||
728 | do_PVK_body(const unsigned char **in, unsigned int saltlen, | |||
729 | unsigned int keylen, pem_password_cb *cb, void *u) | |||
730 | { | |||
731 | EVP_PKEY *ret = NULL((void *)0); | |||
732 | const unsigned char *p = *in; | |||
733 | unsigned int magic; | |||
734 | unsigned char *enctmp = NULL((void *)0), *q; | |||
735 | EVP_CIPHER_CTX *cctx = NULL((void *)0); | |||
736 | ||||
737 | if ((cctx = EVP_CIPHER_CTX_new()) == NULL((void *)0)) { | |||
738 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,738); | |||
739 | goto err; | |||
740 | } | |||
741 | if (saltlen) { | |||
742 | char psbuf[PEM_BUFSIZE1024]; | |||
743 | unsigned char keybuf[20]; | |||
744 | int enctmplen, inlen; | |||
745 | ||||
746 | if (cb) | |||
747 | inlen = cb(psbuf, PEM_BUFSIZE1024, 0, u); | |||
748 | else | |||
749 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE1024, 0, u); | |||
750 | if (inlen <= 0) { | |||
751 | PEMerror(PEM_R_BAD_PASSWORD_READ)ERR_put_error(9,(0xfff),(104),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,751); | |||
752 | goto err; | |||
753 | } | |||
754 | enctmp = malloc(keylen + 8); | |||
755 | if (!enctmp) { | |||
756 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,756); | |||
757 | goto err; | |||
758 | } | |||
759 | if (!derive_pvk_key(keybuf, p, saltlen, (unsigned char *)psbuf, | |||
760 | inlen)) { | |||
761 | goto err; | |||
762 | } | |||
763 | p += saltlen; | |||
764 | /* Copy BLOBHEADER across, decrypt rest */ | |||
765 | memcpy(enctmp, p, 8); | |||
766 | p += 8; | |||
767 | if (keylen < 8) { | |||
768 | PEMerror(PEM_R_PVK_TOO_SHORT)ERR_put_error(9,(0xfff),(125),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,768); | |||
769 | goto err; | |||
770 | } | |||
771 | inlen = keylen - 8; | |||
772 | q = enctmp + 8; | |||
773 | if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL((void *)0), keybuf, NULL((void *)0))) | |||
774 | goto err; | |||
775 | if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen)) | |||
776 | goto err; | |||
777 | if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen)) | |||
778 | goto err; | |||
779 | magic = read_ledword((const unsigned char **)&q); | |||
780 | if (magic != MS_RSA2MAGIC0x32415352L && magic != MS_DSS2MAGIC0x32535344L) { | |||
781 | q = enctmp + 8; | |||
782 | memset(keybuf + 5, 0, 11); | |||
783 | if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL((void *)0), keybuf, | |||
784 | NULL((void *)0))) | |||
785 | goto err; | |||
786 | explicit_bzero(keybuf, 20); | |||
787 | if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen)) | |||
788 | goto err; | |||
789 | if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, | |||
790 | &enctmplen)) | |||
791 | goto err; | |||
792 | magic = read_ledword((const unsigned char **)&q); | |||
793 | if (magic != MS_RSA2MAGIC0x32415352L && magic != MS_DSS2MAGIC0x32535344L) { | |||
794 | PEMerror(PEM_R_BAD_DECRYPT)ERR_put_error(9,(0xfff),(101),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,794); | |||
795 | goto err; | |||
796 | } | |||
797 | } else | |||
798 | explicit_bzero(keybuf, 20); | |||
799 | p = enctmp; | |||
800 | } | |||
801 | ||||
802 | ret = b2i_PrivateKey(&p, keylen); | |||
803 | ||||
804 | err: | |||
805 | EVP_CIPHER_CTX_free(cctx); | |||
806 | if (enctmp && saltlen) | |||
807 | free(enctmp); | |||
808 | return ret; | |||
809 | } | |||
810 | ||||
811 | ||||
812 | EVP_PKEY * | |||
813 | b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u) | |||
814 | { | |||
815 | unsigned char pvk_hdr[24], *buf = NULL((void *)0); | |||
816 | const unsigned char *p; | |||
817 | size_t buflen; | |||
818 | EVP_PKEY *ret = NULL((void *)0); | |||
819 | unsigned int saltlen, keylen; | |||
820 | ||||
821 | if (BIO_read(in, pvk_hdr, 24) != 24) { | |||
822 | PEMerror(PEM_R_PVK_DATA_TOO_SHORT)ERR_put_error(9,(0xfff),(124),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,822); | |||
823 | return NULL((void *)0); | |||
824 | } | |||
825 | p = pvk_hdr; | |||
826 | ||||
827 | if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen)) | |||
828 | return 0; | |||
829 | buflen = keylen + saltlen; | |||
830 | buf = malloc(buflen); | |||
831 | if (!buf) { | |||
832 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,832); | |||
833 | return 0; | |||
834 | } | |||
835 | p = buf; | |||
836 | if (BIO_read(in, buf, buflen) != buflen) { | |||
837 | PEMerror(PEM_R_PVK_DATA_TOO_SHORT)ERR_put_error(9,(0xfff),(124),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,837); | |||
838 | goto err; | |||
839 | } | |||
840 | ret = do_PVK_body(&p, saltlen, keylen, cb, u); | |||
841 | ||||
842 | err: | |||
843 | freezero(buf, buflen); | |||
844 | return ret; | |||
845 | } | |||
846 | LCRYPTO_ALIAS(b2i_PVK_bio)asm(""); | |||
847 | ||||
848 | static int | |||
849 | i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel, pem_password_cb *cb, | |||
850 | void *u) | |||
851 | { | |||
852 | int outlen = 24, pklen; | |||
853 | unsigned char *p = NULL((void *)0), *start = NULL((void *)0), *salt = NULL((void *)0); | |||
854 | EVP_CIPHER_CTX *cctx = NULL((void *)0); | |||
855 | ||||
856 | if ((cctx = EVP_CIPHER_CTX_new()) == NULL((void *)0)) { | |||
857 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,857); | |||
858 | goto err; | |||
859 | } | |||
860 | if (enclevel != 0) | |||
861 | outlen += PVK_SALTLEN0x10; | |||
862 | pklen = do_i2b(NULL((void *)0), pk, 0); | |||
863 | if (pklen < 0) | |||
864 | goto err; | |||
865 | outlen += pklen; | |||
866 | start = p = malloc(outlen); | |||
867 | if (!p) { | |||
868 | PEMerror(ERR_R_MALLOC_FAILURE)ERR_put_error(9,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,868); | |||
869 | goto err; | |||
870 | } | |||
871 | ||||
872 | write_ledword(&p, MS_PVKMAGIC0xb0b5f11eL); | |||
873 | write_ledword(&p, 0); | |||
874 | if (pk->type
| |||
875 | write_ledword(&p, MS_KEYTYPE_SIGN0x2); | |||
876 | else | |||
877 | write_ledword(&p, MS_KEYTYPE_KEYX0x1); | |||
878 | write_ledword(&p, enclevel
| |||
879 | write_ledword(&p, enclevel
| |||
880 | write_ledword(&p, pklen); | |||
881 | if (enclevel
| |||
882 | arc4random_buf(p, PVK_SALTLEN0x10); | |||
883 | salt = p; | |||
884 | p += PVK_SALTLEN0x10; | |||
885 | } | |||
886 | do_i2b(&p, pk, 0); | |||
887 | if (enclevel
| |||
888 | char psbuf[PEM_BUFSIZE1024]; | |||
889 | unsigned char keybuf[20]; | |||
890 | int enctmplen, inlen; | |||
891 | if (cb) | |||
892 | inlen = cb(psbuf, PEM_BUFSIZE1024, 1, u); | |||
893 | else | |||
894 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE1024, 1, u); | |||
895 | if (inlen <= 0) { | |||
896 | PEMerror(PEM_R_BAD_PASSWORD_READ)ERR_put_error(9,(0xfff),(104),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,896); | |||
897 | goto err; | |||
898 | } | |||
899 | if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN0x10, | |||
900 | (unsigned char *)psbuf, inlen)) | |||
901 | goto err; | |||
902 | if (enclevel == 1) | |||
903 | memset(keybuf + 5, 0, 11); | |||
904 | p = salt + PVK_SALTLEN0x10 + 8; | |||
905 | if (!EVP_EncryptInit_ex(cctx, EVP_rc4(), NULL((void *)0), keybuf, NULL((void *)0))) | |||
906 | goto err; | |||
907 | explicit_bzero(keybuf, 20); | |||
908 | if (!EVP_EncryptUpdate(cctx, p, &enctmplen, p, pklen - 8)) | |||
909 | goto err; | |||
910 | if (!EVP_EncryptFinal_ex(cctx, p + enctmplen, &enctmplen)) | |||
911 | goto err; | |||
912 | } | |||
913 | EVP_CIPHER_CTX_free(cctx); | |||
914 | *out = start; | |||
915 | return outlen; | |||
916 | ||||
917 | err: | |||
918 | EVP_CIPHER_CTX_free(cctx); | |||
919 | free(start); | |||
920 | return -1; | |||
921 | } | |||
922 | ||||
923 | int | |||
924 | i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel, pem_password_cb *cb, void *u) | |||
925 | { | |||
926 | unsigned char *tmp = NULL((void *)0); | |||
927 | int outlen, wrlen; | |||
928 | ||||
929 | outlen = i2b_PVK(&tmp, pk, enclevel, cb, u); | |||
| ||||
930 | if (outlen < 0) | |||
931 | return -1; | |||
| ||||
932 | wrlen = BIO_write(out, tmp, outlen); | |||
933 | free(tmp); | |||
934 | if (wrlen != outlen) { | |||
935 | PEMerror(PEM_R_BIO_WRITE_FAILURE)ERR_put_error(9,(0xfff),(118),"/usr/src/lib/libcrypto/pem/pvkfmt.c" ,935); | |||
936 | return -1; | |||
937 | } | |||
938 | return outlen; | |||
939 | } | |||
940 | LCRYPTO_ALIAS(i2b_PVK_bio)asm(""); | |||
941 | ||||
942 | #endif | |||
943 | ||||
944 | #endif |