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Commit | Line | Data |
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0f113f3e | 1 | /* |
33388b44 | 2 | * Copyright 2005-2020 The OpenSSL Project Authors. All Rights Reserved. |
a0156a92 | 3 | * |
16742672 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
a0156a92 DSH |
8 | */ |
9 | ||
0f113f3e MC |
10 | /* |
11 | * Support for PVK format keys and related structures (such a PUBLICKEYBLOB | |
a0156a92 DSH |
12 | * and PRIVATEKEYBLOB). |
13 | */ | |
14 | ||
f41ac0ee P |
15 | /* |
16 | * DSA low level APIs are deprecated for public use, but still ok for | |
17 | * internal use. | |
18 | */ | |
19 | #include "internal/deprecated.h" | |
20 | ||
b39fc560 | 21 | #include "internal/cryptlib.h" |
a0156a92 | 22 | #include <openssl/pem.h> |
0934cf48 | 23 | #include "crypto/pem.h" |
a0156a92 | 24 | #include <openssl/rand.h> |
1e26a8ba | 25 | #include <openssl/bn.h> |
d4f0339c | 26 | #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA) |
0f113f3e MC |
27 | # include <openssl/dsa.h> |
28 | # include <openssl/rsa.h> | |
a0156a92 | 29 | |
0f113f3e MC |
30 | /* |
31 | * Utility function: read a DWORD (4 byte unsigned integer) in little endian | |
a0156a92 DSH |
32 | * format |
33 | */ | |
34 | ||
35 | static unsigned int read_ledword(const unsigned char **in) | |
0f113f3e MC |
36 | { |
37 | const unsigned char *p = *in; | |
38 | unsigned int ret; | |
cbeb0bfa TM |
39 | ret = (unsigned int)*p++; |
40 | ret |= (unsigned int)*p++ << 8; | |
41 | ret |= (unsigned int)*p++ << 16; | |
42 | ret |= (unsigned int)*p++ << 24; | |
0f113f3e MC |
43 | *in = p; |
44 | return ret; | |
45 | } | |
46 | ||
47 | /* | |
48 | * Read a BIGNUM in little endian format. The docs say that this should take | |
49 | * up bitlen/8 bytes. | |
a0156a92 DSH |
50 | */ |
51 | ||
52 | static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r) | |
0f113f3e | 53 | { |
85a4807f DSH |
54 | *r = BN_lebin2bn(*in, nbyte, NULL); |
55 | if (*r == NULL) | |
0f113f3e | 56 | return 0; |
85a4807f DSH |
57 | *in += nbyte; |
58 | return 1; | |
0f113f3e | 59 | } |
a0156a92 DSH |
60 | |
61 | /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */ | |
62 | ||
0f113f3e MC |
63 | # define MS_PUBLICKEYBLOB 0x6 |
64 | # define MS_PRIVATEKEYBLOB 0x7 | |
65 | # define MS_RSA1MAGIC 0x31415352L | |
66 | # define MS_RSA2MAGIC 0x32415352L | |
67 | # define MS_DSS1MAGIC 0x31535344L | |
68 | # define MS_DSS2MAGIC 0x32535344L | |
a0156a92 | 69 | |
0f113f3e MC |
70 | # define MS_KEYALG_RSA_KEYX 0xa400 |
71 | # define MS_KEYALG_DSS_SIGN 0x2200 | |
a0156a92 | 72 | |
0f113f3e MC |
73 | # define MS_KEYTYPE_KEYX 0x1 |
74 | # define MS_KEYTYPE_SIGN 0x2 | |
a0156a92 | 75 | |
66bcba14 DSH |
76 | /* Maximum length of a blob after header */ |
77 | # define BLOB_MAX_LENGTH 102400 | |
78 | ||
a0156a92 | 79 | /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */ |
0f113f3e | 80 | # define MS_PVKMAGIC 0xb0b5f11eL |
a0156a92 | 81 | /* Salt length for PVK files */ |
0f113f3e | 82 | # define PVK_SALTLEN 0x10 |
5f57abe2 DSH |
83 | /* Maximum length in PVK header */ |
84 | # define PVK_MAX_KEYLEN 102400 | |
85 | /* Maximum salt length */ | |
86 | # define PVK_MAX_SALTLEN 10240 | |
a0156a92 | 87 | |
a773b52a | 88 | static EVP_PKEY *b2i_rsa(const unsigned char **in, |
0f113f3e | 89 | unsigned int bitlen, int ispub); |
a773b52a | 90 | static EVP_PKEY *b2i_dss(const unsigned char **in, |
0f113f3e | 91 | unsigned int bitlen, int ispub); |
a0156a92 | 92 | |
f55838f3 RL |
93 | int ossl_do_blob_header(const unsigned char **in, unsigned int length, |
94 | unsigned int *pmagic, unsigned int *pbitlen, | |
95 | int *pisdss, int *pispub) | |
0f113f3e MC |
96 | { |
97 | const unsigned char *p = *in; | |
98 | if (length < 16) | |
99 | return 0; | |
100 | /* bType */ | |
101 | if (*p == MS_PUBLICKEYBLOB) { | |
102 | if (*pispub == 0) { | |
9311d0c4 | 103 | ERR_raise(ERR_LIB_PEM, PEM_R_EXPECTING_PRIVATE_KEY_BLOB); |
0f113f3e MC |
104 | return 0; |
105 | } | |
106 | *pispub = 1; | |
107 | } else if (*p == MS_PRIVATEKEYBLOB) { | |
108 | if (*pispub == 1) { | |
9311d0c4 | 109 | ERR_raise(ERR_LIB_PEM, PEM_R_EXPECTING_PUBLIC_KEY_BLOB); |
0f113f3e MC |
110 | return 0; |
111 | } | |
112 | *pispub = 0; | |
113 | } else | |
114 | return 0; | |
115 | p++; | |
116 | /* Version */ | |
117 | if (*p++ != 0x2) { | |
9311d0c4 | 118 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_VERSION_NUMBER); |
0f113f3e MC |
119 | return 0; |
120 | } | |
121 | /* Ignore reserved, aiKeyAlg */ | |
122 | p += 6; | |
123 | *pmagic = read_ledword(&p); | |
124 | *pbitlen = read_ledword(&p); | |
125 | *pisdss = 0; | |
126 | switch (*pmagic) { | |
127 | ||
128 | case MS_DSS1MAGIC: | |
129 | *pisdss = 1; | |
018fcbec | 130 | /* fall thru */ |
0f113f3e MC |
131 | case MS_RSA1MAGIC: |
132 | if (*pispub == 0) { | |
9311d0c4 | 133 | ERR_raise(ERR_LIB_PEM, PEM_R_EXPECTING_PRIVATE_KEY_BLOB); |
0f113f3e MC |
134 | return 0; |
135 | } | |
136 | break; | |
137 | ||
138 | case MS_DSS2MAGIC: | |
139 | *pisdss = 1; | |
018fcbec | 140 | /* fall thru */ |
0f113f3e MC |
141 | case MS_RSA2MAGIC: |
142 | if (*pispub == 1) { | |
9311d0c4 | 143 | ERR_raise(ERR_LIB_PEM, PEM_R_EXPECTING_PUBLIC_KEY_BLOB); |
0f113f3e MC |
144 | return 0; |
145 | } | |
146 | break; | |
147 | ||
148 | default: | |
9311d0c4 | 149 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_MAGIC_NUMBER); |
0f113f3e MC |
150 | return -1; |
151 | } | |
152 | *in = p; | |
153 | return 1; | |
154 | } | |
a0156a92 DSH |
155 | |
156 | static unsigned int blob_length(unsigned bitlen, int isdss, int ispub) | |
0f113f3e MC |
157 | { |
158 | unsigned int nbyte, hnbyte; | |
159 | nbyte = (bitlen + 7) >> 3; | |
160 | hnbyte = (bitlen + 15) >> 4; | |
161 | if (isdss) { | |
162 | ||
163 | /* | |
164 | * Expected length: 20 for q + 3 components bitlen each + 24 for seed | |
165 | * structure. | |
166 | */ | |
167 | if (ispub) | |
168 | return 44 + 3 * nbyte; | |
169 | /* | |
170 | * Expected length: 20 for q, priv, 2 bitlen components + 24 for seed | |
171 | * structure. | |
172 | */ | |
173 | else | |
174 | return 64 + 2 * nbyte; | |
175 | } else { | |
176 | /* Expected length: 4 for 'e' + 'n' */ | |
177 | if (ispub) | |
178 | return 4 + nbyte; | |
179 | else | |
180 | /* | |
181 | * Expected length: 4 for 'e' and 7 other components. 2 | |
182 | * components are bitlen size, 5 are bitlen/2 | |
183 | */ | |
184 | return 4 + 2 * nbyte + 5 * hnbyte; | |
185 | } | |
186 | ||
187 | } | |
a0156a92 | 188 | |
413835f5 | 189 | EVP_PKEY *ossl_b2i(const unsigned char **in, unsigned int length, int *ispub) |
0f113f3e MC |
190 | { |
191 | const unsigned char *p = *in; | |
192 | unsigned int bitlen, magic; | |
193 | int isdss; | |
413835f5 | 194 | if (ossl_do_blob_header(&p, length, &magic, &bitlen, &isdss, ispub) <= 0) { |
9311d0c4 | 195 | ERR_raise(ERR_LIB_PEM, PEM_R_KEYBLOB_HEADER_PARSE_ERROR); |
0f113f3e MC |
196 | return NULL; |
197 | } | |
198 | length -= 16; | |
413835f5 | 199 | if (length < blob_length(bitlen, isdss, *ispub)) { |
9311d0c4 | 200 | ERR_raise(ERR_LIB_PEM, PEM_R_KEYBLOB_TOO_SHORT); |
0f113f3e MC |
201 | return NULL; |
202 | } | |
203 | if (isdss) | |
413835f5 | 204 | return b2i_dss(&p, bitlen, *ispub); |
0f113f3e | 205 | else |
413835f5 | 206 | return b2i_rsa(&p, bitlen, *ispub); |
0f113f3e | 207 | } |
a0156a92 | 208 | |
413835f5 | 209 | EVP_PKEY *ossl_b2i_bio(BIO *in, int *ispub) |
0f113f3e MC |
210 | { |
211 | const unsigned char *p; | |
212 | unsigned char hdr_buf[16], *buf = NULL; | |
213 | unsigned int bitlen, magic, length; | |
214 | int isdss; | |
215 | EVP_PKEY *ret = NULL; | |
216 | if (BIO_read(in, hdr_buf, 16) != 16) { | |
9311d0c4 | 217 | ERR_raise(ERR_LIB_PEM, PEM_R_KEYBLOB_TOO_SHORT); |
0f113f3e MC |
218 | return NULL; |
219 | } | |
220 | p = hdr_buf; | |
413835f5 | 221 | if (ossl_do_blob_header(&p, 16, &magic, &bitlen, &isdss, ispub) <= 0) |
0f113f3e MC |
222 | return NULL; |
223 | ||
413835f5 | 224 | length = blob_length(bitlen, isdss, *ispub); |
66bcba14 | 225 | if (length > BLOB_MAX_LENGTH) { |
9311d0c4 | 226 | ERR_raise(ERR_LIB_PEM, PEM_R_HEADER_TOO_LONG); |
66bcba14 DSH |
227 | return NULL; |
228 | } | |
0f113f3e | 229 | buf = OPENSSL_malloc(length); |
90945fa3 | 230 | if (buf == NULL) { |
9311d0c4 | 231 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
232 | goto err; |
233 | } | |
234 | p = buf; | |
235 | if (BIO_read(in, buf, length) != (int)length) { | |
9311d0c4 | 236 | ERR_raise(ERR_LIB_PEM, PEM_R_KEYBLOB_TOO_SHORT); |
0f113f3e MC |
237 | goto err; |
238 | } | |
239 | ||
240 | if (isdss) | |
413835f5 | 241 | ret = b2i_dss(&p, bitlen, *ispub); |
0f113f3e | 242 | else |
413835f5 | 243 | ret = b2i_rsa(&p, bitlen, *ispub); |
0f113f3e MC |
244 | |
245 | err: | |
b548a1f1 | 246 | OPENSSL_free(buf); |
0f113f3e MC |
247 | return ret; |
248 | } | |
a0156a92 | 249 | |
a773b52a | 250 | static EVP_PKEY *b2i_dss(const unsigned char **in, |
0f113f3e MC |
251 | unsigned int bitlen, int ispub) |
252 | { | |
253 | const unsigned char *p = *in; | |
254 | EVP_PKEY *ret = NULL; | |
255 | DSA *dsa = NULL; | |
256 | BN_CTX *ctx = NULL; | |
257 | unsigned int nbyte; | |
1258396d MC |
258 | BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL; |
259 | BIGNUM *pub_key = NULL; | |
260 | ||
0f113f3e MC |
261 | nbyte = (bitlen + 7) >> 3; |
262 | ||
263 | dsa = DSA_new(); | |
264 | ret = EVP_PKEY_new(); | |
90945fa3 | 265 | if (dsa == NULL || ret == NULL) |
0f113f3e | 266 | goto memerr; |
1258396d | 267 | if (!read_lebn(&p, nbyte, &pbn)) |
0f113f3e | 268 | goto memerr; |
1258396d MC |
269 | |
270 | if (!read_lebn(&p, 20, &qbn)) | |
0f113f3e | 271 | goto memerr; |
1258396d MC |
272 | |
273 | if (!read_lebn(&p, nbyte, &gbn)) | |
0f113f3e | 274 | goto memerr; |
1258396d | 275 | |
0f113f3e | 276 | if (ispub) { |
1258396d | 277 | if (!read_lebn(&p, nbyte, &pub_key)) |
0f113f3e MC |
278 | goto memerr; |
279 | } else { | |
1258396d | 280 | if (!read_lebn(&p, 20, &priv_key)) |
0f113f3e | 281 | goto memerr; |
1258396d | 282 | |
724339ff CPG |
283 | /* Set constant time flag before public key calculation */ |
284 | BN_set_flags(priv_key, BN_FLG_CONSTTIME); | |
285 | ||
0f113f3e | 286 | /* Calculate public key */ |
1258396d MC |
287 | pub_key = BN_new(); |
288 | if (pub_key == NULL) | |
0f113f3e | 289 | goto memerr; |
75ebbd9a | 290 | if ((ctx = BN_CTX_new()) == NULL) |
0f113f3e MC |
291 | goto memerr; |
292 | ||
1258396d | 293 | if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx)) |
0f113f3e | 294 | goto memerr; |
1258396d | 295 | |
0f113f3e | 296 | BN_CTX_free(ctx); |
d288d7fc | 297 | ctx = NULL; |
0f113f3e | 298 | } |
1258396d MC |
299 | if (!DSA_set0_pqg(dsa, pbn, qbn, gbn)) |
300 | goto memerr; | |
301 | pbn = qbn = gbn = NULL; | |
302 | if (!DSA_set0_key(dsa, pub_key, priv_key)) | |
303 | goto memerr; | |
d288d7fc | 304 | pub_key = priv_key = NULL; |
0f113f3e | 305 | |
d288d7fc BE |
306 | if (!EVP_PKEY_set1_DSA(ret, dsa)) |
307 | goto memerr; | |
0f113f3e MC |
308 | DSA_free(dsa); |
309 | *in = p; | |
310 | return ret; | |
311 | ||
312 | memerr: | |
9311d0c4 | 313 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
d6407083 | 314 | DSA_free(dsa); |
1258396d MC |
315 | BN_free(pbn); |
316 | BN_free(qbn); | |
317 | BN_free(gbn); | |
318 | BN_free(pub_key); | |
319 | BN_free(priv_key); | |
c5ba2d99 | 320 | EVP_PKEY_free(ret); |
23a1d5e9 | 321 | BN_CTX_free(ctx); |
0f113f3e MC |
322 | return NULL; |
323 | } | |
a0156a92 | 324 | |
a773b52a | 325 | static EVP_PKEY *b2i_rsa(const unsigned char **in, |
0f113f3e MC |
326 | unsigned int bitlen, int ispub) |
327 | { | |
9862e9aa | 328 | const unsigned char *pin = *in; |
0f113f3e | 329 | EVP_PKEY *ret = NULL; |
9862e9aa | 330 | BIGNUM *e = NULL, *n = NULL, *d = NULL; |
204cf940 | 331 | BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL; |
0f113f3e MC |
332 | RSA *rsa = NULL; |
333 | unsigned int nbyte, hnbyte; | |
334 | nbyte = (bitlen + 7) >> 3; | |
335 | hnbyte = (bitlen + 15) >> 4; | |
336 | rsa = RSA_new(); | |
337 | ret = EVP_PKEY_new(); | |
90945fa3 | 338 | if (rsa == NULL || ret == NULL) |
0f113f3e | 339 | goto memerr; |
9862e9aa RL |
340 | e = BN_new(); |
341 | if (e == NULL) | |
0f113f3e | 342 | goto memerr; |
9862e9aa | 343 | if (!BN_set_word(e, read_ledword(&pin))) |
0f113f3e | 344 | goto memerr; |
9862e9aa | 345 | if (!read_lebn(&pin, nbyte, &n)) |
0f113f3e MC |
346 | goto memerr; |
347 | if (!ispub) { | |
9862e9aa | 348 | if (!read_lebn(&pin, hnbyte, &p)) |
0f113f3e | 349 | goto memerr; |
9862e9aa | 350 | if (!read_lebn(&pin, hnbyte, &q)) |
0f113f3e | 351 | goto memerr; |
9862e9aa | 352 | if (!read_lebn(&pin, hnbyte, &dmp1)) |
0f113f3e | 353 | goto memerr; |
9862e9aa | 354 | if (!read_lebn(&pin, hnbyte, &dmq1)) |
0f113f3e | 355 | goto memerr; |
9862e9aa | 356 | if (!read_lebn(&pin, hnbyte, &iqmp)) |
0f113f3e | 357 | goto memerr; |
9862e9aa | 358 | if (!read_lebn(&pin, nbyte, &d)) |
0f113f3e | 359 | goto memerr; |
d288d7fc BE |
360 | if (!RSA_set0_factors(rsa, p, q)) |
361 | goto memerr; | |
362 | p = q = NULL; | |
363 | if (!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp)) | |
364 | goto memerr; | |
365 | dmp1 = dmq1 = iqmp = NULL; | |
0f113f3e | 366 | } |
d288d7fc BE |
367 | if (!RSA_set0_key(rsa, n, e, d)) |
368 | goto memerr; | |
369 | n = e = d = NULL; | |
0f113f3e | 370 | |
d288d7fc BE |
371 | if (!EVP_PKEY_set1_RSA(ret, rsa)) |
372 | goto memerr; | |
0f113f3e | 373 | RSA_free(rsa); |
9862e9aa | 374 | *in = pin; |
0f113f3e MC |
375 | return ret; |
376 | memerr: | |
9311d0c4 | 377 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
204cf940 MC |
378 | BN_free(e); |
379 | BN_free(n); | |
380 | BN_free(p); | |
381 | BN_free(q); | |
382 | BN_free(dmp1); | |
383 | BN_free(dmq1); | |
384 | BN_free(iqmp); | |
385 | BN_free(d); | |
d6407083 | 386 | RSA_free(rsa); |
c5ba2d99 | 387 | EVP_PKEY_free(ret); |
0f113f3e MC |
388 | return NULL; |
389 | } | |
a0156a92 DSH |
390 | |
391 | EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length) | |
0f113f3e | 392 | { |
413835f5 RL |
393 | int ispub = 0; |
394 | ||
395 | return ossl_b2i(in, length, &ispub); | |
0f113f3e | 396 | } |
a0156a92 DSH |
397 | |
398 | EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length) | |
0f113f3e | 399 | { |
413835f5 RL |
400 | int ispub = 1; |
401 | ||
402 | return ossl_b2i(in, length, &ispub); | |
0f113f3e | 403 | } |
a0156a92 DSH |
404 | |
405 | EVP_PKEY *b2i_PrivateKey_bio(BIO *in) | |
0f113f3e | 406 | { |
413835f5 RL |
407 | int ispub = 0; |
408 | ||
409 | return ossl_b2i_bio(in, &ispub); | |
0f113f3e | 410 | } |
a0156a92 DSH |
411 | |
412 | EVP_PKEY *b2i_PublicKey_bio(BIO *in) | |
0f113f3e | 413 | { |
413835f5 RL |
414 | int ispub = 1; |
415 | ||
416 | return ossl_b2i_bio(in, &ispub); | |
0f113f3e | 417 | } |
a0156a92 DSH |
418 | |
419 | static void write_ledword(unsigned char **out, unsigned int dw) | |
0f113f3e MC |
420 | { |
421 | unsigned char *p = *out; | |
422 | *p++ = dw & 0xff; | |
423 | *p++ = (dw >> 8) & 0xff; | |
424 | *p++ = (dw >> 16) & 0xff; | |
425 | *p++ = (dw >> 24) & 0xff; | |
426 | *out = p; | |
427 | } | |
a0156a92 DSH |
428 | |
429 | static void write_lebn(unsigned char **out, const BIGNUM *bn, int len) | |
0f113f3e | 430 | { |
85a4807f DSH |
431 | BN_bn2lebinpad(bn, *out, len); |
432 | *out += len; | |
0f113f3e | 433 | } |
a0156a92 DSH |
434 | |
435 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic); | |
436 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic); | |
437 | ||
438 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub); | |
439 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub); | |
0f113f3e | 440 | |
de0799b0 | 441 | static int do_i2b(unsigned char **out, const EVP_PKEY *pk, int ispub) |
0f113f3e MC |
442 | { |
443 | unsigned char *p; | |
444 | unsigned int bitlen, magic = 0, keyalg; | |
445 | int outlen, noinc = 0; | |
3aeb9348 DSH |
446 | int pktype = EVP_PKEY_id(pk); |
447 | if (pktype == EVP_PKEY_DSA) { | |
448 | bitlen = check_bitlen_dsa(EVP_PKEY_get0_DSA(pk), ispub, &magic); | |
0f113f3e | 449 | keyalg = MS_KEYALG_DSS_SIGN; |
3aeb9348 DSH |
450 | } else if (pktype == EVP_PKEY_RSA) { |
451 | bitlen = check_bitlen_rsa(EVP_PKEY_get0_RSA(pk), ispub, &magic); | |
0f113f3e MC |
452 | keyalg = MS_KEYALG_RSA_KEYX; |
453 | } else | |
454 | return -1; | |
455 | if (bitlen == 0) | |
456 | return -1; | |
457 | outlen = 16 + blob_length(bitlen, | |
458 | keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub); | |
459 | if (out == NULL) | |
460 | return outlen; | |
461 | if (*out) | |
462 | p = *out; | |
463 | else { | |
cdb10bae | 464 | if ((p = OPENSSL_malloc(outlen)) == NULL) { |
9311d0c4 | 465 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
0f113f3e | 466 | return -1; |
cdb10bae | 467 | } |
0f113f3e MC |
468 | *out = p; |
469 | noinc = 1; | |
470 | } | |
471 | if (ispub) | |
472 | *p++ = MS_PUBLICKEYBLOB; | |
473 | else | |
474 | *p++ = MS_PRIVATEKEYBLOB; | |
475 | *p++ = 0x2; | |
476 | *p++ = 0; | |
477 | *p++ = 0; | |
478 | write_ledword(&p, keyalg); | |
479 | write_ledword(&p, magic); | |
480 | write_ledword(&p, bitlen); | |
481 | if (keyalg == MS_KEYALG_DSS_SIGN) | |
3aeb9348 | 482 | write_dsa(&p, EVP_PKEY_get0_DSA(pk), ispub); |
0f113f3e | 483 | else |
3aeb9348 | 484 | write_rsa(&p, EVP_PKEY_get0_RSA(pk), ispub); |
0f113f3e MC |
485 | if (!noinc) |
486 | *out += outlen; | |
487 | return outlen; | |
488 | } | |
a0156a92 | 489 | |
de0799b0 | 490 | static int do_i2b_bio(BIO *out, const EVP_PKEY *pk, int ispub) |
0f113f3e MC |
491 | { |
492 | unsigned char *tmp = NULL; | |
493 | int outlen, wrlen; | |
494 | outlen = do_i2b(&tmp, pk, ispub); | |
495 | if (outlen < 0) | |
496 | return -1; | |
497 | wrlen = BIO_write(out, tmp, outlen); | |
498 | OPENSSL_free(tmp); | |
499 | if (wrlen == outlen) | |
500 | return outlen; | |
501 | return -1; | |
502 | } | |
a0156a92 DSH |
503 | |
504 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic) | |
0f113f3e MC |
505 | { |
506 | int bitlen; | |
2ac6115d RL |
507 | const BIGNUM *p = NULL, *q = NULL, *g = NULL; |
508 | const BIGNUM *pub_key = NULL, *priv_key = NULL; | |
6e9fa57c MC |
509 | |
510 | DSA_get0_pqg(dsa, &p, &q, &g); | |
511 | DSA_get0_key(dsa, &pub_key, &priv_key); | |
512 | bitlen = BN_num_bits(p); | |
513 | if ((bitlen & 7) || (BN_num_bits(q) != 160) | |
514 | || (BN_num_bits(g) > bitlen)) | |
0f113f3e MC |
515 | goto badkey; |
516 | if (ispub) { | |
6e9fa57c | 517 | if (BN_num_bits(pub_key) > bitlen) |
0f113f3e MC |
518 | goto badkey; |
519 | *pmagic = MS_DSS1MAGIC; | |
520 | } else { | |
6e9fa57c | 521 | if (BN_num_bits(priv_key) > 160) |
0f113f3e MC |
522 | goto badkey; |
523 | *pmagic = MS_DSS2MAGIC; | |
524 | } | |
525 | ||
526 | return bitlen; | |
527 | badkey: | |
9311d0c4 | 528 | ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_KEY_COMPONENTS); |
0f113f3e MC |
529 | return 0; |
530 | } | |
a0156a92 DSH |
531 | |
532 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic) | |
0f113f3e MC |
533 | { |
534 | int nbyte, hnbyte, bitlen; | |
2ac6115d | 535 | const BIGNUM *e; |
9862e9aa | 536 | |
1e7c159d | 537 | RSA_get0_key(rsa, NULL, &e, NULL); |
9862e9aa | 538 | if (BN_num_bits(e) > 32) |
0f113f3e | 539 | goto badkey; |
9862e9aa RL |
540 | bitlen = RSA_bits(rsa); |
541 | nbyte = RSA_size(rsa); | |
542 | hnbyte = (bitlen + 15) >> 4; | |
0f113f3e MC |
543 | if (ispub) { |
544 | *pmagic = MS_RSA1MAGIC; | |
545 | return bitlen; | |
546 | } else { | |
2ac6115d | 547 | const BIGNUM *d, *p, *q, *iqmp, *dmp1, *dmq1; |
9862e9aa | 548 | |
0f113f3e | 549 | *pmagic = MS_RSA2MAGIC; |
9862e9aa | 550 | |
0f113f3e MC |
551 | /* |
552 | * For private key each component must fit within nbyte or hnbyte. | |
553 | */ | |
9862e9aa RL |
554 | RSA_get0_key(rsa, NULL, NULL, &d); |
555 | if (BN_num_bytes(d) > nbyte) | |
0f113f3e | 556 | goto badkey; |
9862e9aa RL |
557 | RSA_get0_factors(rsa, &p, &q); |
558 | RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp); | |
559 | if ((BN_num_bytes(iqmp) > hnbyte) | |
560 | || (BN_num_bytes(p) > hnbyte) | |
561 | || (BN_num_bytes(q) > hnbyte) | |
562 | || (BN_num_bytes(dmp1) > hnbyte) | |
563 | || (BN_num_bytes(dmq1) > hnbyte)) | |
0f113f3e MC |
564 | goto badkey; |
565 | } | |
566 | return bitlen; | |
567 | badkey: | |
9311d0c4 | 568 | ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_KEY_COMPONENTS); |
0f113f3e MC |
569 | return 0; |
570 | } | |
a0156a92 DSH |
571 | |
572 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub) | |
0f113f3e MC |
573 | { |
574 | int nbyte, hnbyte; | |
2ac6115d | 575 | const BIGNUM *n, *d, *e, *p, *q, *iqmp, *dmp1, *dmq1; |
9862e9aa RL |
576 | |
577 | nbyte = RSA_size(rsa); | |
578 | hnbyte = (RSA_bits(rsa) + 15) >> 4; | |
1e7c159d | 579 | RSA_get0_key(rsa, &n, &e, &d); |
9862e9aa | 580 | write_lebn(out, e, 4); |
159f6e7e | 581 | write_lebn(out, n, nbyte); |
0f113f3e MC |
582 | if (ispub) |
583 | return; | |
9862e9aa RL |
584 | RSA_get0_factors(rsa, &p, &q); |
585 | RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp); | |
586 | write_lebn(out, p, hnbyte); | |
587 | write_lebn(out, q, hnbyte); | |
588 | write_lebn(out, dmp1, hnbyte); | |
589 | write_lebn(out, dmq1, hnbyte); | |
590 | write_lebn(out, iqmp, hnbyte); | |
591 | write_lebn(out, d, nbyte); | |
0f113f3e MC |
592 | } |
593 | ||
a0156a92 | 594 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub) |
0f113f3e MC |
595 | { |
596 | int nbyte; | |
2ac6115d RL |
597 | const BIGNUM *p = NULL, *q = NULL, *g = NULL; |
598 | const BIGNUM *pub_key = NULL, *priv_key = NULL; | |
6e9fa57c MC |
599 | |
600 | DSA_get0_pqg(dsa, &p, &q, &g); | |
601 | DSA_get0_key(dsa, &pub_key, &priv_key); | |
602 | nbyte = BN_num_bytes(p); | |
603 | write_lebn(out, p, nbyte); | |
604 | write_lebn(out, q, 20); | |
605 | write_lebn(out, g, nbyte); | |
0f113f3e | 606 | if (ispub) |
6e9fa57c | 607 | write_lebn(out, pub_key, nbyte); |
0f113f3e | 608 | else |
6e9fa57c | 609 | write_lebn(out, priv_key, 20); |
0f113f3e MC |
610 | /* Set "invalid" for seed structure values */ |
611 | memset(*out, 0xff, 24); | |
612 | *out += 24; | |
613 | return; | |
614 | } | |
a0156a92 | 615 | |
de0799b0 | 616 | int i2b_PrivateKey_bio(BIO *out, const EVP_PKEY *pk) |
0f113f3e MC |
617 | { |
618 | return do_i2b_bio(out, pk, 0); | |
619 | } | |
a0156a92 | 620 | |
de0799b0 | 621 | int i2b_PublicKey_bio(BIO *out, const EVP_PKEY *pk) |
0f113f3e MC |
622 | { |
623 | return do_i2b_bio(out, pk, 1); | |
624 | } | |
a0156a92 | 625 | |
0f113f3e | 626 | # ifndef OPENSSL_NO_RC4 |
00a37b5a | 627 | |
f55838f3 RL |
628 | int ossl_do_PVK_header(const unsigned char **in, unsigned int length, |
629 | int skip_magic, | |
630 | unsigned int *psaltlen, unsigned int *pkeylen) | |
0f113f3e MC |
631 | { |
632 | const unsigned char *p = *in; | |
633 | unsigned int pvk_magic, is_encrypted; | |
12a765a5 | 634 | |
0f113f3e MC |
635 | if (skip_magic) { |
636 | if (length < 20) { | |
9311d0c4 | 637 | ERR_raise(ERR_LIB_PEM, PEM_R_PVK_TOO_SHORT); |
0f113f3e MC |
638 | return 0; |
639 | } | |
0f113f3e MC |
640 | } else { |
641 | if (length < 24) { | |
9311d0c4 | 642 | ERR_raise(ERR_LIB_PEM, PEM_R_PVK_TOO_SHORT); |
0f113f3e MC |
643 | return 0; |
644 | } | |
0f113f3e MC |
645 | pvk_magic = read_ledword(&p); |
646 | if (pvk_magic != MS_PVKMAGIC) { | |
9311d0c4 | 647 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_MAGIC_NUMBER); |
0f113f3e MC |
648 | return 0; |
649 | } | |
650 | } | |
651 | /* Skip reserved */ | |
652 | p += 4; | |
653 | /* | |
654 | * keytype = | |
655 | */ read_ledword(&p); | |
656 | is_encrypted = read_ledword(&p); | |
657 | *psaltlen = read_ledword(&p); | |
658 | *pkeylen = read_ledword(&p); | |
659 | ||
5f57abe2 DSH |
660 | if (*pkeylen > PVK_MAX_KEYLEN || *psaltlen > PVK_MAX_SALTLEN) |
661 | return 0; | |
662 | ||
12a765a5 | 663 | if (is_encrypted && *psaltlen == 0) { |
9311d0c4 | 664 | ERR_raise(ERR_LIB_PEM, PEM_R_INCONSISTENT_HEADER); |
0f113f3e MC |
665 | return 0; |
666 | } | |
667 | ||
668 | *in = p; | |
669 | return 1; | |
670 | } | |
671 | ||
672 | static int derive_pvk_key(unsigned char *key, | |
673 | const unsigned char *salt, unsigned int saltlen, | |
674 | const unsigned char *pass, int passlen) | |
675 | { | |
3cb9fd97 | 676 | EVP_MD_CTX *mctx = EVP_MD_CTX_new(); |
0f113f3e | 677 | int rv = 1; |
6e59a892 RL |
678 | if (mctx == NULL |
679 | || !EVP_DigestInit_ex(mctx, EVP_sha1(), NULL) | |
680 | || !EVP_DigestUpdate(mctx, salt, saltlen) | |
681 | || !EVP_DigestUpdate(mctx, pass, passlen) | |
682 | || !EVP_DigestFinal_ex(mctx, key, NULL)) | |
0f113f3e MC |
683 | rv = 0; |
684 | ||
bfb0641f | 685 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
686 | return rv; |
687 | } | |
a0156a92 DSH |
688 | |
689 | static EVP_PKEY *do_PVK_body(const unsigned char **in, | |
0f113f3e MC |
690 | unsigned int saltlen, unsigned int keylen, |
691 | pem_password_cb *cb, void *u) | |
692 | { | |
693 | EVP_PKEY *ret = NULL; | |
694 | const unsigned char *p = *in; | |
695 | unsigned int magic; | |
696 | unsigned char *enctmp = NULL, *q; | |
0239283d | 697 | unsigned char keybuf[20]; |
25aaa98a | 698 | |
846ec07d | 699 | EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new(); |
0f113f3e MC |
700 | if (saltlen) { |
701 | char psbuf[PEM_BUFSIZE]; | |
0f113f3e MC |
702 | int enctmplen, inlen; |
703 | if (cb) | |
704 | inlen = cb(psbuf, PEM_BUFSIZE, 0, u); | |
705 | else | |
706 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u); | |
c82c3462 | 707 | if (inlen < 0) { |
9311d0c4 | 708 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ); |
3f6c7691 | 709 | goto err; |
0f113f3e MC |
710 | } |
711 | enctmp = OPENSSL_malloc(keylen + 8); | |
90945fa3 | 712 | if (enctmp == NULL) { |
9311d0c4 | 713 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
3f6c7691 | 714 | goto err; |
0f113f3e MC |
715 | } |
716 | if (!derive_pvk_key(keybuf, p, saltlen, | |
717 | (unsigned char *)psbuf, inlen)) | |
3f6c7691 | 718 | goto err; |
0f113f3e MC |
719 | p += saltlen; |
720 | /* Copy BLOBHEADER across, decrypt rest */ | |
721 | memcpy(enctmp, p, 8); | |
722 | p += 8; | |
723 | if (keylen < 8) { | |
9311d0c4 | 724 | ERR_raise(ERR_LIB_PEM, PEM_R_PVK_TOO_SHORT); |
3f6c7691 | 725 | goto err; |
0f113f3e MC |
726 | } |
727 | inlen = keylen - 8; | |
728 | q = enctmp + 8; | |
846ec07d | 729 | if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL)) |
0f113f3e | 730 | goto err; |
846ec07d | 731 | if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen)) |
0f113f3e | 732 | goto err; |
846ec07d | 733 | if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen)) |
0f113f3e MC |
734 | goto err; |
735 | magic = read_ledword((const unsigned char **)&q); | |
736 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) { | |
737 | q = enctmp + 8; | |
738 | memset(keybuf + 5, 0, 11); | |
846ec07d | 739 | if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL)) |
0f113f3e | 740 | goto err; |
846ec07d | 741 | if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen)) |
0f113f3e | 742 | goto err; |
846ec07d | 743 | if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen)) |
0f113f3e MC |
744 | goto err; |
745 | magic = read_ledword((const unsigned char **)&q); | |
746 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) { | |
9311d0c4 | 747 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_DECRYPT); |
0f113f3e MC |
748 | goto err; |
749 | } | |
0239283d | 750 | } |
0f113f3e MC |
751 | p = enctmp; |
752 | } | |
753 | ||
754 | ret = b2i_PrivateKey(&p, keylen); | |
755 | err: | |
846ec07d | 756 | EVP_CIPHER_CTX_free(cctx); |
0239283d SL |
757 | if (enctmp != NULL) { |
758 | OPENSSL_cleanse(keybuf, sizeof(keybuf)); | |
759 | OPENSSL_free(enctmp); | |
760 | } | |
0f113f3e MC |
761 | return ret; |
762 | } | |
a0156a92 DSH |
763 | |
764 | EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u) | |
0f113f3e MC |
765 | { |
766 | unsigned char pvk_hdr[24], *buf = NULL; | |
767 | const unsigned char *p; | |
768 | int buflen; | |
769 | EVP_PKEY *ret = NULL; | |
770 | unsigned int saltlen, keylen; | |
771 | if (BIO_read(in, pvk_hdr, 24) != 24) { | |
9311d0c4 | 772 | ERR_raise(ERR_LIB_PEM, PEM_R_PVK_DATA_TOO_SHORT); |
0f113f3e MC |
773 | return NULL; |
774 | } | |
775 | p = pvk_hdr; | |
776 | ||
f55838f3 | 777 | if (!ossl_do_PVK_header(&p, 24, 0, &saltlen, &keylen)) |
0f113f3e MC |
778 | return 0; |
779 | buflen = (int)keylen + saltlen; | |
780 | buf = OPENSSL_malloc(buflen); | |
90945fa3 | 781 | if (buf == NULL) { |
9311d0c4 | 782 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
783 | return 0; |
784 | } | |
785 | p = buf; | |
786 | if (BIO_read(in, buf, buflen) != buflen) { | |
9311d0c4 | 787 | ERR_raise(ERR_LIB_PEM, PEM_R_PVK_DATA_TOO_SHORT); |
0f113f3e MC |
788 | goto err; |
789 | } | |
790 | ret = do_PVK_body(&p, saltlen, keylen, cb, u); | |
791 | ||
792 | err: | |
4b45c6e5 | 793 | OPENSSL_clear_free(buf, buflen); |
0f113f3e MC |
794 | return ret; |
795 | } | |
796 | ||
de0799b0 | 797 | static int i2b_PVK(unsigned char **out, const EVP_PKEY *pk, int enclevel, |
0f113f3e MC |
798 | pem_password_cb *cb, void *u) |
799 | { | |
800 | int outlen = 24, pklen; | |
febb096c | 801 | unsigned char *p = NULL, *start = NULL, *salt = NULL; |
8e588e28 | 802 | EVP_CIPHER_CTX *cctx = NULL; |
0f113f3e MC |
803 | if (enclevel) |
804 | outlen += PVK_SALTLEN; | |
805 | pklen = do_i2b(NULL, pk, 0); | |
806 | if (pklen < 0) | |
807 | return -1; | |
808 | outlen += pklen; | |
8e588e28 | 809 | if (out == NULL) |
0f113f3e | 810 | return outlen; |
8e588e28 | 811 | if (*out != NULL) { |
0f113f3e | 812 | p = *out; |
8e588e28 | 813 | } else { |
febb096c | 814 | start = p = OPENSSL_malloc(outlen); |
90945fa3 | 815 | if (p == NULL) { |
9311d0c4 | 816 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
817 | return -1; |
818 | } | |
0f113f3e MC |
819 | } |
820 | ||
8e588e28 MC |
821 | cctx = EVP_CIPHER_CTX_new(); |
822 | if (cctx == NULL) | |
098c1e3d | 823 | goto error; |
8e588e28 | 824 | |
0f113f3e MC |
825 | write_ledword(&p, MS_PVKMAGIC); |
826 | write_ledword(&p, 0); | |
3aeb9348 | 827 | if (EVP_PKEY_id(pk) == EVP_PKEY_DSA) |
0f113f3e MC |
828 | write_ledword(&p, MS_KEYTYPE_SIGN); |
829 | else | |
830 | write_ledword(&p, MS_KEYTYPE_KEYX); | |
831 | write_ledword(&p, enclevel ? 1 : 0); | |
832 | write_ledword(&p, enclevel ? PVK_SALTLEN : 0); | |
833 | write_ledword(&p, pklen); | |
834 | if (enclevel) { | |
835 | if (RAND_bytes(p, PVK_SALTLEN) <= 0) | |
836 | goto error; | |
837 | salt = p; | |
838 | p += PVK_SALTLEN; | |
839 | } | |
840 | do_i2b(&p, pk, 0); | |
8e588e28 | 841 | if (enclevel != 0) { |
0f113f3e MC |
842 | char psbuf[PEM_BUFSIZE]; |
843 | unsigned char keybuf[20]; | |
844 | int enctmplen, inlen; | |
845 | if (cb) | |
846 | inlen = cb(psbuf, PEM_BUFSIZE, 1, u); | |
847 | else | |
848 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u); | |
849 | if (inlen <= 0) { | |
9311d0c4 | 850 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ); |
0f113f3e MC |
851 | goto error; |
852 | } | |
853 | if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN, | |
854 | (unsigned char *)psbuf, inlen)) | |
855 | goto error; | |
856 | if (enclevel == 1) | |
857 | memset(keybuf + 5, 0, 11); | |
858 | p = salt + PVK_SALTLEN + 8; | |
846ec07d | 859 | if (!EVP_EncryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL)) |
0f113f3e MC |
860 | goto error; |
861 | OPENSSL_cleanse(keybuf, 20); | |
dca51418 | 862 | if (!EVP_EncryptUpdate(cctx, p, &enctmplen, p, pklen - 8)) |
0f113f3e | 863 | goto error; |
dca51418 | 864 | if (!EVP_EncryptFinal_ex(cctx, p + enctmplen, &enctmplen)) |
0f113f3e MC |
865 | goto error; |
866 | } | |
8e588e28 | 867 | |
846ec07d | 868 | EVP_CIPHER_CTX_free(cctx); |
8e588e28 MC |
869 | |
870 | if (*out == NULL) | |
febb096c | 871 | *out = start; |
8e588e28 | 872 | |
0f113f3e MC |
873 | return outlen; |
874 | ||
875 | error: | |
846ec07d | 876 | EVP_CIPHER_CTX_free(cctx); |
098c1e3d | 877 | if (*out == NULL) |
febb096c | 878 | OPENSSL_free(start); |
0f113f3e MC |
879 | return -1; |
880 | } | |
a0156a92 | 881 | |
de0799b0 | 882 | int i2b_PVK_bio(BIO *out, const EVP_PKEY *pk, int enclevel, |
0f113f3e MC |
883 | pem_password_cb *cb, void *u) |
884 | { | |
885 | unsigned char *tmp = NULL; | |
886 | int outlen, wrlen; | |
887 | outlen = i2b_PVK(&tmp, pk, enclevel, cb, u); | |
888 | if (outlen < 0) | |
889 | return -1; | |
890 | wrlen = BIO_write(out, tmp, outlen); | |
891 | OPENSSL_free(tmp); | |
892 | if (wrlen == outlen) { | |
0f113f3e MC |
893 | return outlen; |
894 | } | |
9311d0c4 | 895 | ERR_raise(ERR_LIB_PEM, PEM_R_BIO_WRITE_FAILURE); |
0f113f3e MC |
896 | return -1; |
897 | } | |
898 | ||
899 | # endif | |
00a37b5a | 900 | |
d4f0339c | 901 | #endif |