dsa_ameth.c@ 85201

最後變更在這個檔案從85201是 83916,由 vboxsync 提交於 5 年前
openssl-1.1.1g: Applied and adjusted our OpenSSL changes to 1.1.1g. bugref:9719
檔案大小: 13.6 KB

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1	/*
2	* Copyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved.
3	*
4	* Licensed under the OpenSSL license (the "License"). You may not use
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
8	*/
9
10	#include <stdio.h>
11	#include "internal/cryptlib.h"
12	#include <openssl/x509.h>
13	#include <openssl/asn1.h>
14	#include "dsa_local.h"
15	#include <openssl/bn.h>
16	#include <openssl/cms.h>
17	#include "crypto/asn1.h"
18	#include "crypto/evp.h"
19
20	static int dsa_pub_decode(EVP_PKEY pkey, X509_PUBKEY pubkey)
21	{
22	const unsigned char p, pm;
23	int pklen, pmlen;
24	int ptype;
25	const void *pval;
26	const ASN1_STRING *pstr;
27	X509_ALGOR *palg;
28	ASN1_INTEGER *public_key = NULL;
29
30	DSA *dsa = NULL;
31
32	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
33	return 0;
34	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
35
36	if (ptype == V_ASN1_SEQUENCE) {
37	pstr = pval;
38	pm = pstr->data;
39	pmlen = pstr->length;
40
41	if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL) {
42	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
43	goto err;
44	}
45
46	} else if ((ptype == V_ASN1_NULL) \|\| (ptype == V_ASN1_UNDEF)) {
47	if ((dsa = DSA_new()) == NULL) {
48	DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
49	goto err;
50	}
51	} else {
52	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
53	goto err;
54	}
55
56	if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
57	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
58	goto err;
59	}
60
61	if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
62	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
63	goto err;
64	}
65
66	ASN1_INTEGER_free(public_key);
67	EVP_PKEY_assign_DSA(pkey, dsa);
68	return 1;
69
70	err:
71	ASN1_INTEGER_free(public_key);
72	DSA_free(dsa);
73	return 0;
74
75	}
76
77	static int dsa_pub_encode(X509_PUBKEY pk, const EVP_PKEY pkey)
78	{
79	DSA *dsa;
80	int ptype;
81	unsigned char *penc = NULL;
82	int penclen;
83	ASN1_STRING *str = NULL;
84	ASN1_INTEGER *pubint = NULL;
85	ASN1_OBJECT *aobj;
86
87	dsa = pkey->pkey.dsa;
88	if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
89	str = ASN1_STRING_new();
90	if (str == NULL) {
91	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
92	goto err;
93	}
94	str->length = i2d_DSAparams(dsa, &str->data);
95	if (str->length <= 0) {
96	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
97	goto err;
98	}
99	ptype = V_ASN1_SEQUENCE;
100	} else
101	ptype = V_ASN1_UNDEF;
102
103	pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
104
105	if (pubint == NULL) {
106	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
107	goto err;
108	}
109
110	penclen = i2d_ASN1_INTEGER(pubint, &penc);
111	ASN1_INTEGER_free(pubint);
112
113	if (penclen <= 0) {
114	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
115	goto err;
116	}
117
118	aobj = OBJ_nid2obj(EVP_PKEY_DSA);
119	if (aobj == NULL)
120	goto err;
121
122	if (X509_PUBKEY_set0_param(pk, aobj, ptype, str, penc, penclen))
123	return 1;
124
125	err:
126	OPENSSL_free(penc);
127	ASN1_STRING_free(str);
128
129	return 0;
130	}
131
132	/*
133	* In PKCS#8 DSA: you just get a private key integer and parameters in the
134	* AlgorithmIdentifier the pubkey must be recalculated.
135	*/
136
137	static int dsa_priv_decode(EVP_PKEY pkey, const PKCS8_PRIV_KEY_INFO p8)
138	{
139	const unsigned char p, pm;
140	int pklen, pmlen;
141	int ptype;
142	const void *pval;
143	const ASN1_STRING *pstr;
144	const X509_ALGOR *palg;
145	ASN1_INTEGER *privkey = NULL;
146	BN_CTX *ctx = NULL;
147
148	DSA *dsa = NULL;
149
150	int ret = 0;
151
152	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
153	return 0;
154	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
155
156	if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
157	goto decerr;
158	if (privkey->type == V_ASN1_NEG_INTEGER \|\| ptype != V_ASN1_SEQUENCE)
159	goto decerr;
160
161	pstr = pval;
162	pm = pstr->data;
163	pmlen = pstr->length;
164	if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
165	goto decerr;
166	/* We have parameters now set private key */
167	if ((dsa->priv_key = BN_secure_new()) == NULL
168	\|\| !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
169	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
170	goto dsaerr;
171	}
172	/* Calculate public key */
173	if ((dsa->pub_key = BN_new()) == NULL) {
174	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
175	goto dsaerr;
176	}
177	if ((ctx = BN_CTX_new()) == NULL) {
178	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
179	goto dsaerr;
180	}
181
182	BN_set_flags(dsa->priv_key, BN_FLG_CONSTTIME);
183	if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
184	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
185	goto dsaerr;
186	}
187
188	EVP_PKEY_assign_DSA(pkey, dsa);
189
190	ret = 1;
191	goto done;
192
193	decerr:
194	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR);
195	dsaerr:
196	DSA_free(dsa);
197	done:
198	BN_CTX_free(ctx);
199	ASN1_STRING_clear_free(privkey);
200	return ret;
201	}
202
203	static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO p8, const EVP_PKEY pkey)
204	{
205	ASN1_STRING *params = NULL;
206	ASN1_INTEGER *prkey = NULL;
207	unsigned char *dp = NULL;
208	int dplen;
209
210	if (!pkey->pkey.dsa \|\| !pkey->pkey.dsa->priv_key) {
211	DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
212	goto err;
213	}
214
215	params = ASN1_STRING_new();
216
217	if (params == NULL) {
218	DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
219	goto err;
220	}
221
222	params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
223	if (params->length <= 0) {
224	DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
225	goto err;
226	}
227	params->type = V_ASN1_SEQUENCE;
228
229	/* Get private key into integer */
230	prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
231
232	if (!prkey) {
233	DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
234	goto err;
235	}
236
237	dplen = i2d_ASN1_INTEGER(prkey, &dp);
238
239	ASN1_STRING_clear_free(prkey);
240	prkey = NULL;
241
242	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
243	V_ASN1_SEQUENCE, params, dp, dplen))
244	goto err;
245
246	return 1;
247
248	err:
249	OPENSSL_free(dp);
250	ASN1_STRING_free(params);
251	ASN1_STRING_clear_free(prkey);
252	return 0;
253	}
254
255	static int int_dsa_size(const EVP_PKEY *pkey)
256	{
257	return DSA_size(pkey->pkey.dsa);
258	}
259
260	static int dsa_bits(const EVP_PKEY *pkey)
261	{
262	return DSA_bits(pkey->pkey.dsa);
263	}
264
265	static int dsa_security_bits(const EVP_PKEY *pkey)
266	{
267	return DSA_security_bits(pkey->pkey.dsa);
268	}
269
270	static int dsa_missing_parameters(const EVP_PKEY *pkey)
271	{
272	DSA *dsa;
273	dsa = pkey->pkey.dsa;
274	if (dsa == NULL \|\| dsa->p == NULL \|\| dsa->q == NULL \|\| dsa->g == NULL)
275	return 1;
276	return 0;
277	}
278
279	static int dsa_copy_parameters(EVP_PKEY to, const EVP_PKEY from)
280	{
281	BIGNUM *a;
282
283	if (to->pkey.dsa == NULL) {
284	to->pkey.dsa = DSA_new();
285	if (to->pkey.dsa == NULL)
286	return 0;
287	}
288
289	if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
290	return 0;
291	BN_free(to->pkey.dsa->p);
292	to->pkey.dsa->p = a;
293
294	if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
295	return 0;
296	BN_free(to->pkey.dsa->q);
297	to->pkey.dsa->q = a;
298
299	if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
300	return 0;
301	BN_free(to->pkey.dsa->g);
302	to->pkey.dsa->g = a;
303	return 1;
304	}
305
306	static int dsa_cmp_parameters(const EVP_PKEY a, const EVP_PKEY b)
307	{
308	if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) \|\|
309	BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) \|\|
310	BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
311	return 0;
312	else
313	return 1;
314	}
315
316	static int dsa_pub_cmp(const EVP_PKEY a, const EVP_PKEY b)
317	{
318	if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
319	return 0;
320	else
321	return 1;
322	}
323
324	static void int_dsa_free(EVP_PKEY *pkey)
325	{
326	DSA_free(pkey->pkey.dsa);
327	}
328
329	static int do_dsa_print(BIO bp, const DSA x, int off, int ptype)
330	{
331	int ret = 0;
332	const char *ktype = NULL;
333	const BIGNUM priv_key, pub_key;
334
335	if (ptype == 2)
336	priv_key = x->priv_key;
337	else
338	priv_key = NULL;
339
340	if (ptype > 0)
341	pub_key = x->pub_key;
342	else
343	pub_key = NULL;
344
345	if (ptype == 2)
346	ktype = "Private-Key";
347	else if (ptype == 1)
348	ktype = "Public-Key";
349	else
350	ktype = "DSA-Parameters";
351
352	if (priv_key) {
353	if (!BIO_indent(bp, off, 128))
354	goto err;
355	if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
356	<= 0)
357	goto err;
358	}
359
360	if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
361	goto err;
362	if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
363	goto err;
364	if (!ASN1_bn_print(bp, "P: ", x->p, NULL, off))
365	goto err;
366	if (!ASN1_bn_print(bp, "Q: ", x->q, NULL, off))
367	goto err;
368	if (!ASN1_bn_print(bp, "G: ", x->g, NULL, off))
369	goto err;
370	ret = 1;
371	err:
372	return ret;
373	}
374
375	static int dsa_param_decode(EVP_PKEY *pkey,
376	const unsigned char **pder, int derlen)
377	{
378	DSA *dsa;
379
380	if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
381	DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
382	return 0;
383	}
384	EVP_PKEY_assign_DSA(pkey, dsa);
385	return 1;
386	}
387
388	static int dsa_param_encode(const EVP_PKEY pkey, unsigned char *pder)
389	{
390	return i2d_DSAparams(pkey->pkey.dsa, pder);
391	}
392
393	static int dsa_param_print(BIO bp, const EVP_PKEY pkey, int indent,
394	ASN1_PCTX *ctx)
395	{
396	return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
397	}
398
399	static int dsa_pub_print(BIO bp, const EVP_PKEY pkey, int indent,
400	ASN1_PCTX *ctx)
401	{
402	return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
403	}
404
405	static int dsa_priv_print(BIO bp, const EVP_PKEY pkey, int indent,
406	ASN1_PCTX *ctx)
407	{
408	return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
409	}
410
411	static int old_dsa_priv_decode(EVP_PKEY *pkey,
412	const unsigned char **pder, int derlen)
413	{
414	DSA *dsa;
415
416	if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
417	DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
418	return 0;
419	}
420	EVP_PKEY_assign_DSA(pkey, dsa);
421	return 1;
422	}
423
424	static int old_dsa_priv_encode(const EVP_PKEY pkey, unsigned char *pder)
425	{
426	return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
427	}
428
429	static int dsa_sig_print(BIO bp, const X509_ALGOR sigalg,
430	const ASN1_STRING sig, int indent, ASN1_PCTX pctx)
431	{
432	DSA_SIG *dsa_sig;
433	const unsigned char *p;
434
435	if (!sig) {
436	if (BIO_puts(bp, "\n") <= 0)
437	return 0;
438	else
439	return 1;
440	}
441	p = sig->data;
442	dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
443	if (dsa_sig) {
444	int rv = 0;
445	const BIGNUM r, s;
446
447	DSA_SIG_get0(dsa_sig, &r, &s);
448
449	if (BIO_write(bp, "\n", 1) != 1)
450	goto err;
451
452	if (!ASN1_bn_print(bp, "r: ", r, NULL, indent))
453	goto err;
454	if (!ASN1_bn_print(bp, "s: ", s, NULL, indent))
455	goto err;
456	rv = 1;
457	err:
458	DSA_SIG_free(dsa_sig);
459	return rv;
460	}
461	return X509_signature_dump(bp, sig, indent);
462	}
463
464	static int dsa_pkey_ctrl(EVP_PKEY pkey, int op, long arg1, void arg2)
465	{
466	switch (op) {
467	case ASN1_PKEY_CTRL_PKCS7_SIGN:
468	if (arg1 == 0) {
469	int snid, hnid;
470	X509_ALGOR alg1, alg2;
471	PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
472	if (alg1 == NULL \|\| alg1->algorithm == NULL)
473	return -1;
474	hnid = OBJ_obj2nid(alg1->algorithm);
475	if (hnid == NID_undef)
476	return -1;
477	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
478	return -1;
479	X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
480	}
481	return 1;
482	#ifndef OPENSSL_NO_CMS
483	case ASN1_PKEY_CTRL_CMS_SIGN:
484	if (arg1 == 0) {
485	int snid, hnid;
486	X509_ALGOR alg1, alg2;
487	CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
488	if (alg1 == NULL \|\| alg1->algorithm == NULL)
489	return -1;
490	hnid = OBJ_obj2nid(alg1->algorithm);
491	if (hnid == NID_undef)
492	return -1;
493	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
494	return -1;
495	X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
496	}
497	return 1;
498
499	case ASN1_PKEY_CTRL_CMS_RI_TYPE:
500	(int )arg2 = CMS_RECIPINFO_NONE;
501	return 1;
502	#endif
503
504	case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
505	(int )arg2 = NID_sha256;
506	return 1;
507
508	default:
509	return -2;
510
511	}
512
513	}
514
515	/* NB these are sorted in pkey_id order, lowest first */
516
517	const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[5] = {
518
519	{
520	EVP_PKEY_DSA2,
521	EVP_PKEY_DSA,
522	ASN1_PKEY_ALIAS},
523
524	{
525	EVP_PKEY_DSA1,
526	EVP_PKEY_DSA,
527	ASN1_PKEY_ALIAS},
528
529	{
530	EVP_PKEY_DSA4,
531	EVP_PKEY_DSA,
532	ASN1_PKEY_ALIAS},
533
534	{
535	EVP_PKEY_DSA3,
536	EVP_PKEY_DSA,
537	ASN1_PKEY_ALIAS},
538
539	{
540	EVP_PKEY_DSA,
541	EVP_PKEY_DSA,
542	0,
543
544	"DSA",
545	"OpenSSL DSA method",
546
547	dsa_pub_decode,
548	dsa_pub_encode,
549	dsa_pub_cmp,
550	dsa_pub_print,
551
552	dsa_priv_decode,
553	dsa_priv_encode,
554	dsa_priv_print,
555
556	int_dsa_size,
557	dsa_bits,
558	dsa_security_bits,
559
560	dsa_param_decode,
561	dsa_param_encode,
562	dsa_missing_parameters,
563	dsa_copy_parameters,
564	dsa_cmp_parameters,
565	dsa_param_print,
566	dsa_sig_print,
567
568	int_dsa_free,
569	dsa_pkey_ctrl,
570	old_dsa_priv_decode,
571	old_dsa_priv_encode}
572	};

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source: vbox/trunk/src/libs/openssl-1.1.1g/crypto/dsa/dsa_ameth.c@ 85201

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