2 * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include "internal/cryptlib.h"
12 #include <openssl/x509.h>
13 #include <openssl/asn1.h>
15 #include <openssl/bn.h>
16 #include <openssl/cms.h>
17 #include "internal/asn1_int.h"
18 #include "internal/evp_int.h"
20 static int dsa_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
22 const unsigned char *p
, *pm
;
28 ASN1_INTEGER
*public_key
= NULL
;
32 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
34 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
36 if (ptype
== V_ASN1_SEQUENCE
) {
41 if ((dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)) == NULL
) {
42 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_DECODE_ERROR
);
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
);
52 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_PARAMETER_ENCODING_ERROR
);
56 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
) {
57 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_DECODE_ERROR
);
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
);
66 ASN1_INTEGER_free(public_key
);
67 EVP_PKEY_assign_DSA(pkey
, dsa
);
71 ASN1_INTEGER_free(public_key
);
77 static int dsa_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
81 unsigned char *penc
= NULL
;
83 ASN1_STRING
*str
= NULL
;
84 ASN1_INTEGER
*pubint
= NULL
;
87 if (pkey
->save_parameters
&& dsa
->p
&& dsa
->q
&& dsa
->g
) {
88 str
= ASN1_STRING_new();
90 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
93 str
->length
= i2d_DSAparams(dsa
, &str
->data
);
94 if (str
->length
<= 0) {
95 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
98 ptype
= V_ASN1_SEQUENCE
;
100 ptype
= V_ASN1_UNDEF
;
102 pubint
= BN_to_ASN1_INTEGER(dsa
->pub_key
, NULL
);
104 if (pubint
== NULL
) {
105 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
109 penclen
= i2d_ASN1_INTEGER(pubint
, &penc
);
110 ASN1_INTEGER_free(pubint
);
113 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
117 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_DSA
),
118 ptype
, str
, penc
, penclen
))
123 ASN1_STRING_free(str
);
129 * In PKCS#8 DSA: you just get a private key integer and parameters in the
130 * AlgorithmIdentifier the pubkey must be recalculated.
133 static int dsa_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
135 const unsigned char *p
, *pm
;
141 ASN1_INTEGER
*privkey
= NULL
;
148 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
150 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
152 if ((privkey
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
)
154 if (privkey
->type
== V_ASN1_NEG_INTEGER
|| ptype
!= V_ASN1_SEQUENCE
)
159 pmlen
= pstr
->length
;
160 if ((dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)) == NULL
)
162 /* We have parameters now set private key */
163 if ((dsa
->priv_key
= BN_secure_new()) == NULL
164 || !ASN1_INTEGER_to_BN(privkey
, dsa
->priv_key
)) {
165 DSAerr(DSA_F_DSA_PRIV_DECODE
, DSA_R_BN_ERROR
);
168 /* Calculate public key */
169 if ((dsa
->pub_key
= BN_new()) == NULL
) {
170 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
173 if ((ctx
= BN_CTX_new()) == NULL
) {
174 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
178 if (!BN_mod_exp(dsa
->pub_key
, dsa
->g
, dsa
->priv_key
, dsa
->p
, ctx
)) {
179 DSAerr(DSA_F_DSA_PRIV_DECODE
, DSA_R_BN_ERROR
);
183 EVP_PKEY_assign_DSA(pkey
, dsa
);
189 DSAerr(DSA_F_DSA_PRIV_DECODE
, DSA_R_DECODE_ERROR
);
194 ASN1_STRING_clear_free(privkey
);
198 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
200 ASN1_STRING
*params
= NULL
;
201 ASN1_INTEGER
*prkey
= NULL
;
202 unsigned char *dp
= NULL
;
205 if (!pkey
->pkey
.dsa
|| !pkey
->pkey
.dsa
->priv_key
) {
206 DSAerr(DSA_F_DSA_PRIV_ENCODE
, DSA_R_MISSING_PARAMETERS
);
210 params
= ASN1_STRING_new();
212 if (params
== NULL
) {
213 DSAerr(DSA_F_DSA_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
217 params
->length
= i2d_DSAparams(pkey
->pkey
.dsa
, ¶ms
->data
);
218 if (params
->length
<= 0) {
219 DSAerr(DSA_F_DSA_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
222 params
->type
= V_ASN1_SEQUENCE
;
224 /* Get private key into integer */
225 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dsa
->priv_key
, NULL
);
228 DSAerr(DSA_F_DSA_PRIV_ENCODE
, DSA_R_BN_ERROR
);
232 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
234 ASN1_STRING_clear_free(prkey
);
237 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_dsa
), 0,
238 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
245 ASN1_STRING_free(params
);
246 ASN1_STRING_clear_free(prkey
);
250 static int int_dsa_size(const EVP_PKEY
*pkey
)
252 return (DSA_size(pkey
->pkey
.dsa
));
255 static int dsa_bits(const EVP_PKEY
*pkey
)
257 return BN_num_bits(pkey
->pkey
.dsa
->p
);
260 static int dsa_security_bits(const EVP_PKEY
*pkey
)
262 return DSA_security_bits(pkey
->pkey
.dsa
);
265 static int dsa_missing_parameters(const EVP_PKEY
*pkey
)
268 dsa
= pkey
->pkey
.dsa
;
269 if (dsa
== NULL
|| dsa
->p
== NULL
|| dsa
->q
== NULL
|| dsa
->g
== NULL
)
274 static int dsa_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
278 if (to
->pkey
.dsa
== NULL
) {
279 to
->pkey
.dsa
= DSA_new();
280 if (to
->pkey
.dsa
== NULL
)
284 if ((a
= BN_dup(from
->pkey
.dsa
->p
)) == NULL
)
286 BN_free(to
->pkey
.dsa
->p
);
289 if ((a
= BN_dup(from
->pkey
.dsa
->q
)) == NULL
)
291 BN_free(to
->pkey
.dsa
->q
);
294 if ((a
= BN_dup(from
->pkey
.dsa
->g
)) == NULL
)
296 BN_free(to
->pkey
.dsa
->g
);
301 static int dsa_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
303 if (BN_cmp(a
->pkey
.dsa
->p
, b
->pkey
.dsa
->p
) ||
304 BN_cmp(a
->pkey
.dsa
->q
, b
->pkey
.dsa
->q
) ||
305 BN_cmp(a
->pkey
.dsa
->g
, b
->pkey
.dsa
->g
))
311 static int dsa_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
313 if (BN_cmp(b
->pkey
.dsa
->pub_key
, a
->pkey
.dsa
->pub_key
) != 0)
319 static void int_dsa_free(EVP_PKEY
*pkey
)
321 DSA_free(pkey
->pkey
.dsa
);
324 static int do_dsa_print(BIO
*bp
, const DSA
*x
, int off
, int ptype
)
327 const char *ktype
= NULL
;
328 const BIGNUM
*priv_key
, *pub_key
;
331 priv_key
= x
->priv_key
;
336 pub_key
= x
->pub_key
;
341 ktype
= "Private-Key";
343 ktype
= "Public-Key";
345 ktype
= "DSA-Parameters";
348 if (!BIO_indent(bp
, off
, 128))
350 if (BIO_printf(bp
, "%s: (%d bit)\n", ktype
, BN_num_bits(x
->p
))
355 if (!ASN1_bn_print(bp
, "priv:", priv_key
, NULL
, off
))
357 if (!ASN1_bn_print(bp
, "pub: ", pub_key
, NULL
, off
))
359 if (!ASN1_bn_print(bp
, "P: ", x
->p
, NULL
, off
))
361 if (!ASN1_bn_print(bp
, "Q: ", x
->q
, NULL
, off
))
363 if (!ASN1_bn_print(bp
, "G: ", x
->g
, NULL
, off
))
370 static int dsa_param_decode(EVP_PKEY
*pkey
,
371 const unsigned char **pder
, int derlen
)
375 if ((dsa
= d2i_DSAparams(NULL
, pder
, derlen
)) == NULL
) {
376 DSAerr(DSA_F_DSA_PARAM_DECODE
, ERR_R_DSA_LIB
);
379 EVP_PKEY_assign_DSA(pkey
, dsa
);
383 static int dsa_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
385 return i2d_DSAparams(pkey
->pkey
.dsa
, pder
);
388 static int dsa_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
391 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 0);
394 static int dsa_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
397 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 1);
400 static int dsa_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
403 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 2);
406 static int old_dsa_priv_decode(EVP_PKEY
*pkey
,
407 const unsigned char **pder
, int derlen
)
411 if ((dsa
= d2i_DSAPrivateKey(NULL
, pder
, derlen
)) == NULL
) {
412 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE
, ERR_R_DSA_LIB
);
415 EVP_PKEY_assign_DSA(pkey
, dsa
);
419 static int old_dsa_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
421 return i2d_DSAPrivateKey(pkey
->pkey
.dsa
, pder
);
424 static int dsa_sig_print(BIO
*bp
, const X509_ALGOR
*sigalg
,
425 const ASN1_STRING
*sig
, int indent
, ASN1_PCTX
*pctx
)
428 const unsigned char *p
;
431 if (BIO_puts(bp
, "\n") <= 0)
437 dsa_sig
= d2i_DSA_SIG(NULL
, &p
, sig
->length
);
442 DSA_SIG_get0(&r
, &s
, dsa_sig
);
444 if (BIO_write(bp
, "\n", 1) != 1)
447 if (!ASN1_bn_print(bp
, "r: ", r
, NULL
, indent
))
449 if (!ASN1_bn_print(bp
, "s: ", s
, NULL
, indent
))
453 DSA_SIG_free(dsa_sig
);
456 return X509_signature_dump(bp
, sig
, indent
);
459 static int dsa_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
462 case ASN1_PKEY_CTRL_PKCS7_SIGN
:
465 X509_ALGOR
*alg1
, *alg2
;
466 PKCS7_SIGNER_INFO_get0_algs(arg2
, NULL
, &alg1
, &alg2
);
467 if (alg1
== NULL
|| alg1
->algorithm
== NULL
)
469 hnid
= OBJ_obj2nid(alg1
->algorithm
);
470 if (hnid
== NID_undef
)
472 if (!OBJ_find_sigid_by_algs(&snid
, hnid
, EVP_PKEY_id(pkey
)))
474 X509_ALGOR_set0(alg2
, OBJ_nid2obj(snid
), V_ASN1_UNDEF
, 0);
477 #ifndef OPENSSL_NO_CMS
478 case ASN1_PKEY_CTRL_CMS_SIGN
:
481 X509_ALGOR
*alg1
, *alg2
;
482 CMS_SignerInfo_get0_algs(arg2
, NULL
, NULL
, &alg1
, &alg2
);
483 if (alg1
== NULL
|| alg1
->algorithm
== NULL
)
485 hnid
= OBJ_obj2nid(alg1
->algorithm
);
486 if (hnid
== NID_undef
)
488 if (!OBJ_find_sigid_by_algs(&snid
, hnid
, EVP_PKEY_id(pkey
)))
490 X509_ALGOR_set0(alg2
, OBJ_nid2obj(snid
), V_ASN1_UNDEF
, 0);
494 case ASN1_PKEY_CTRL_CMS_RI_TYPE
:
495 *(int *)arg2
= CMS_RECIPINFO_NONE
;
499 case ASN1_PKEY_CTRL_DEFAULT_MD_NID
:
500 *(int *)arg2
= NID_sha256
;
510 /* NB these are sorted in pkey_id order, lowest first */
512 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths
[] = {
540 "OpenSSL DSA method",
557 dsa_missing_parameters
,