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-rw-r--r--src/crypto/evp/p_dsa_asn1.c569
1 files changed, 569 insertions, 0 deletions
diff --git a/src/crypto/evp/p_dsa_asn1.c b/src/crypto/evp/p_dsa_asn1.c
new file mode 100644
index 0000000..0ac7da7
--- /dev/null
+++ b/src/crypto/evp/p_dsa_asn1.c
@@ -0,0 +1,569 @@
+/* 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, dsa_pub_decode, 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, dsa_pub_decode, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ } else {
+ OPENSSL_PUT_ERROR(EVP, dsa_pub_decode, EVP_R_PARAMETER_ENCODING_ERROR);
+ goto err;
+ }
+
+ public_key = d2i_ASN1_INTEGER(NULL, &p, pklen);
+ if (public_key == NULL) {
+ OPENSSL_PUT_ERROR(EVP, dsa_pub_decode, 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, dsa_pub_decode, 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;
+ void *pval = NULL;
+ uint8_t *penc = NULL;
+ int penclen;
+
+ dsa = pkey->pkey.dsa;
+ dsa->write_params = 0;
+
+ penclen = i2d_DSAPublicKey(dsa, &penc);
+
+ if (penclen <= 0) {
+ OPENSSL_PUT_ERROR(EVP, dsa_pub_encode, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA), V_ASN1_UNDEF, 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, dsa_priv_decode, ERR_LIB_BN);
+ goto dsaerr;
+ }
+ /* Calculate public key. */
+ dsa->pub_key = BN_new();
+ if (dsa->pub_key == NULL) {
+ OPENSSL_PUT_ERROR(EVP, dsa_priv_decode, ERR_R_MALLOC_FAILURE);
+ goto dsaerr;
+ }
+ ctx = BN_CTX_new();
+ if (ctx == NULL) {
+ OPENSSL_PUT_ERROR(EVP, dsa_priv_decode, 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, dsa_priv_decode, 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, dsa_priv_decode, 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, dsa_priv_encode, EVP_R_MISSING_PARAMETERS);
+ goto err;
+ }
+
+ params = ASN1_STRING_new();
+ if (!params) {
+ OPENSSL_PUT_ERROR(EVP, dsa_priv_encode, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
+ if (params->length <= 0) {
+ OPENSSL_PUT_ERROR(EVP, dsa_priv_encode, 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, dsa_priv_encode, 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, do_dsa_print, 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, dsa_param_decode, 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, old_dsa_priv_decode, 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, dsa_sig_print, 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",
+ "OpenSSL DSA method",
+
+ 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,
+};
generated by cgit v1.1 at 2024-12-22 22:37:30 +0000