- /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
- * 2006.
- */
- /* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com). */
-
- #include <openssl/evp.h>
-
- #include <openssl/asn1.h>
- #include <openssl/asn1t.h>
- #include <openssl/digest.h>
- #include <openssl/dsa.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
- #include <openssl/obj.h>
- #include <openssl/x509.h>
-
- #include "../dsa/internal.h"
- #include "internal.h"
-
-
- static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) {
- const uint8_t *p, *pm;
- int pklen, pmlen;
- int ptype;
- void *pval;
- ASN1_STRING *pstr;
- X509_ALGOR *palg;
- ASN1_INTEGER *public_key = NULL;
-
- DSA *dsa = NULL;
-
- if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) {
- return 0;
- }
- X509_ALGOR_get0(NULL, &ptype, &pval, palg);
-
- if (ptype == V_ASN1_SEQUENCE) {
- pstr = pval;
- pm = pstr->data;
- pmlen = pstr->length;
-
- dsa = d2i_DSAparams(NULL, &pm, pmlen);
- if (dsa == NULL) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
- goto err;
- }
- } else if (ptype == V_ASN1_NULL || ptype == V_ASN1_UNDEF) {
- dsa = DSA_new();
- if (dsa == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- } else {
- OPENSSL_PUT_ERROR(EVP, EVP_R_PARAMETER_ENCODING_ERROR);
- goto err;
- }
-
- public_key = d2i_ASN1_INTEGER(NULL, &p, pklen);
- if (public_key == NULL) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
- goto err;
- }
-
- dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL);
- if (dsa->pub_key == NULL) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_BN_DECODE_ERROR);
- goto err;
- }
-
- ASN1_INTEGER_free(public_key);
- EVP_PKEY_assign_DSA(pkey, dsa);
- return 1;
-
- err:
- ASN1_INTEGER_free(public_key);
- DSA_free(dsa);
- return 0;
- }
-
- static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) {
- DSA *dsa;
- ASN1_STRING *pval = NULL;
- uint8_t *penc = NULL;
- int penclen;
-
- dsa = pkey->pkey.dsa;
- dsa->write_params = 0;
-
- int ptype;
- if (dsa->p && dsa->q && dsa->g) {
- pval = ASN1_STRING_new();
- if (!pval) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- pval->length = i2d_DSAparams(dsa, &pval->data);
- if (pval->length <= 0) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- ptype = V_ASN1_SEQUENCE;
- } else {
- ptype = V_ASN1_UNDEF;
- }
-
- penclen = i2d_DSAPublicKey(dsa, &penc);
- if (penclen <= 0) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA), ptype, pval,
- penc, penclen)) {
- return 1;
- }
-
- err:
- OPENSSL_free(penc);
- ASN1_STRING_free(pval);
-
- return 0;
- }
-
- static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) {
- const uint8_t *p, *pm;
- int pklen, pmlen;
- int ptype;
- void *pval;
- ASN1_STRING *pstr;
- X509_ALGOR *palg;
- ASN1_INTEGER *privkey = NULL;
- BN_CTX *ctx = NULL;
-
- /* In PKCS#8 DSA: you just get a private key integer and parameters in the
- * AlgorithmIdentifier the pubkey must be recalculated. */
-
- STACK_OF(ASN1_TYPE) *ndsa = NULL;
- DSA *dsa = NULL;
-
- if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) {
- return 0;
- }
- X509_ALGOR_get0(NULL, &ptype, &pval, palg);
-
- /* Check for broken DSA PKCS#8, UGH! */
- if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
- ASN1_TYPE *t1, *t2;
- ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen);
- if (ndsa == NULL) {
- goto decerr;
- }
- if (sk_ASN1_TYPE_num(ndsa) != 2) {
- goto decerr;
- }
-
- /* Handle Two broken types:
- * SEQUENCE {parameters, priv_key}
- * SEQUENCE {pub_key, priv_key}. */
-
- t1 = sk_ASN1_TYPE_value(ndsa, 0);
- t2 = sk_ASN1_TYPE_value(ndsa, 1);
- if (t1->type == V_ASN1_SEQUENCE) {
- p8->broken = PKCS8_EMBEDDED_PARAM;
- pval = t1->value.ptr;
- } else if (ptype == V_ASN1_SEQUENCE) {
- p8->broken = PKCS8_NS_DB;
- } else {
- goto decerr;
- }
-
- if (t2->type != V_ASN1_INTEGER) {
- goto decerr;
- }
-
- privkey = t2->value.integer;
- } else {
- const uint8_t *q = p;
- privkey = d2i_ASN1_INTEGER(NULL, &p, pklen);
- if (privkey == NULL) {
- goto decerr;
- }
- if (privkey->type == V_ASN1_NEG_INTEGER) {
- p8->broken = PKCS8_NEG_PRIVKEY;
- ASN1_INTEGER_free(privkey);
- privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen);
- if (privkey == NULL) {
- goto decerr;
- }
- }
- if (ptype != V_ASN1_SEQUENCE) {
- goto decerr;
- }
- }
-
- pstr = pval;
- pm = pstr->data;
- pmlen = pstr->length;
- dsa = d2i_DSAparams(NULL, &pm, pmlen);
- if (dsa == NULL) {
- goto decerr;
- }
- /* We have parameters. Now set private key */
- dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL);
- if (dsa->priv_key == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_LIB_BN);
- goto dsaerr;
- }
- /* Calculate public key. */
- dsa->pub_key = BN_new();
- if (dsa->pub_key == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto dsaerr;
- }
- ctx = BN_CTX_new();
- if (ctx == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto dsaerr;
- }
-
- if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
- OPENSSL_PUT_ERROR(EVP, ERR_LIB_BN);
- goto dsaerr;
- }
-
- EVP_PKEY_assign_DSA(pkey, dsa);
- BN_CTX_free(ctx);
- sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
- ASN1_INTEGER_free(privkey);
-
- return 1;
-
- decerr:
- OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
-
- dsaerr:
- BN_CTX_free(ctx);
- ASN1_INTEGER_free(privkey);
- sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
- DSA_free(dsa);
- return 0;
- }
-
- static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) {
- ASN1_STRING *params = NULL;
- ASN1_INTEGER *prkey = NULL;
- uint8_t *dp = NULL;
- int dplen;
-
- if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_MISSING_PARAMETERS);
- goto err;
- }
-
- params = ASN1_STRING_new();
- if (!params) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
- if (params->length <= 0) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- params->type = V_ASN1_SEQUENCE;
-
- /* Get private key into integer. */
- prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
-
- if (!prkey) {
- OPENSSL_PUT_ERROR(EVP, ERR_LIB_BN);
- goto err;
- }
-
- dplen = i2d_ASN1_INTEGER(prkey, &dp);
-
- ASN1_INTEGER_free(prkey);
-
- if (!PKCS8_pkey_set0(p8, (ASN1_OBJECT *)OBJ_nid2obj(NID_dsa), 0,
- V_ASN1_SEQUENCE, params, dp, dplen)) {
- goto err;
- }
-
- return 1;
-
- err:
- OPENSSL_free(dp);
- ASN1_STRING_free(params);
- ASN1_INTEGER_free(prkey);
- return 0;
- }
-
- static int int_dsa_size(const EVP_PKEY *pkey) {
- return DSA_size(pkey->pkey.dsa);
- }
-
- static int dsa_bits(const EVP_PKEY *pkey) {
- return BN_num_bits(pkey->pkey.dsa->p);
- }
-
- static int dsa_missing_parameters(const EVP_PKEY *pkey) {
- DSA *dsa;
- dsa = pkey->pkey.dsa;
- if (dsa->p == NULL || dsa->q == NULL || dsa->g == NULL) {
- return 1;
- }
- return 0;
- }
-
- static int dup_bn_into(BIGNUM **out, BIGNUM *src) {
- BIGNUM *a;
-
- a = BN_dup(src);
- if (a == NULL) {
- return 0;
- }
- BN_free(*out);
- *out = a;
-
- return 1;
- }
-
- static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) {
- if (!dup_bn_into(&to->pkey.dsa->p, from->pkey.dsa->p) ||
- !dup_bn_into(&to->pkey.dsa->q, from->pkey.dsa->q) ||
- !dup_bn_into(&to->pkey.dsa->g, from->pkey.dsa->g)) {
- return 0;
- }
-
- return 1;
- }
-
- static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) {
- return BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) == 0 &&
- BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) == 0 &&
- BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g) == 0;
- }
-
- static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
- return BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) == 0;
- }
-
- static void int_dsa_free(EVP_PKEY *pkey) { DSA_free(pkey->pkey.dsa); }
-
- static void update_buflen(const BIGNUM *b, size_t *pbuflen) {
- size_t i;
-
- if (!b) {
- return;
- }
- i = BN_num_bytes(b);
- if (*pbuflen < i) {
- *pbuflen = i;
- }
- }
-
- static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype) {
- uint8_t *m = NULL;
- int ret = 0;
- size_t buf_len = 0;
- const char *ktype = NULL;
-
- const BIGNUM *priv_key, *pub_key;
-
- priv_key = NULL;
- if (ptype == 2) {
- priv_key = x->priv_key;
- }
-
- pub_key = NULL;
- if (ptype > 0) {
- pub_key = x->pub_key;
- }
-
- ktype = "DSA-Parameters";
- if (ptype == 2) {
- ktype = "Private-Key";
- } else if (ptype == 1) {
- ktype = "Public-Key";
- }
-
- update_buflen(x->p, &buf_len);
- update_buflen(x->q, &buf_len);
- update_buflen(x->g, &buf_len);
- update_buflen(priv_key, &buf_len);
- update_buflen(pub_key, &buf_len);
-
- m = (uint8_t *)OPENSSL_malloc(buf_len + 10);
- if (m == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (priv_key) {
- if (!BIO_indent(bp, off, 128) ||
- BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) {
- goto err;
- }
- }
-
- if (!ASN1_bn_print(bp, "priv:", priv_key, m, off) ||
- !ASN1_bn_print(bp, "pub: ", pub_key, m, off) ||
- !ASN1_bn_print(bp, "P: ", x->p, m, off) ||
- !ASN1_bn_print(bp, "Q: ", x->q, m, off) ||
- !ASN1_bn_print(bp, "G: ", x->g, m, off)) {
- goto err;
- }
- ret = 1;
-
- err:
- OPENSSL_free(m);
- return ret;
- }
-
- static int dsa_param_decode(EVP_PKEY *pkey, const uint8_t **pder, int derlen) {
- DSA *dsa;
- dsa = d2i_DSAparams(NULL, pder, derlen);
- if (dsa == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_DSA_LIB);
- return 0;
- }
- EVP_PKEY_assign_DSA(pkey, dsa);
- return 1;
- }
-
- static int dsa_param_encode(const EVP_PKEY *pkey, uint8_t **pder) {
- return i2d_DSAparams(pkey->pkey.dsa, pder);
- }
-
- static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
- ASN1_PCTX *ctx) {
- return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
- }
-
- static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
- ASN1_PCTX *ctx) {
- return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
- }
-
- static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
- ASN1_PCTX *ctx) {
- return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
- }
-
- static int old_dsa_priv_decode(EVP_PKEY *pkey, const uint8_t **pder,
- int derlen) {
- DSA *dsa;
- dsa = d2i_DSAPrivateKey(NULL, pder, derlen);
- if (dsa == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_DSA_LIB);
- return 0;
- }
- EVP_PKEY_assign_DSA(pkey, dsa);
- return 1;
- }
-
- static int old_dsa_priv_encode(const EVP_PKEY *pkey, uint8_t **pder) {
- return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
- }
-
- static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
- const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) {
- DSA_SIG *dsa_sig;
- const uint8_t *p;
-
- if (!sig) {
- return BIO_puts(bp, "\n") > 0;
- }
-
- p = sig->data;
- dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
- if (dsa_sig == NULL) {
- return X509_signature_dump(bp, sig, indent);
- }
-
- int rv = 0;
- size_t buf_len = 0;
- uint8_t *m = NULL;
-
- update_buflen(dsa_sig->r, &buf_len);
- update_buflen(dsa_sig->s, &buf_len);
- m = OPENSSL_malloc(buf_len + 10);
- if (m == NULL) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (BIO_write(bp, "\n", 1) != 1 ||
- !ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent) ||
- !ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent)) {
- goto err;
- }
- rv = 1;
-
- err:
- OPENSSL_free(m);
- DSA_SIG_free(dsa_sig);
- return rv;
- }
-
- const EVP_PKEY_ASN1_METHOD dsa_asn1_meth = {
- EVP_PKEY_DSA,
- EVP_PKEY_DSA,
- 0,
-
- "DSA",
-
- dsa_pub_decode,
- dsa_pub_encode,
- dsa_pub_cmp,
- dsa_pub_print,
-
- dsa_priv_decode,
- dsa_priv_encode,
- dsa_priv_print,
-
- NULL /* pkey_opaque */,
- NULL /* pkey_supports_digest */,
-
- int_dsa_size,
- dsa_bits,
-
- dsa_param_decode,
- dsa_param_encode,
- dsa_missing_parameters,
- dsa_copy_parameters,
- dsa_cmp_parameters,
- dsa_param_print,
- dsa_sig_print,
-
- int_dsa_free,
- old_dsa_priv_decode,
- old_dsa_priv_encode,
- };
|