Latest update.

2020-02-17 23:45:59 +09:00
parent 9dfeec3942
commit f85de4da03
381 changed files with 7278 additions and 1826 deletions
@@ -0,0 +1,85 @@
+/*
+ * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/bn.h>
+#include "dsa_local.h"
+#include "crypto/dsa.h"
+
+int dsa_check_params(const DSA *dsa, int *ret)
+{
+    int nid;
+    /*
+     * (2b) FFC domain params conform to FIPS-186-4 explicit domain param
+     * validity tests.
+     */
+    return ffc_params_FIPS186_4_validate(&dsa->params, FFC_PARAM_TYPE_DSA, NULL,
+                                         FFC_PARAMS_VALIDATE_ALL, ret, NULL);
+}
+
+/*
+ * See SP800-56Ar3 Section 5.6.2.3.1 : FFC Full public key validation.
+ */
+int dsa_check_pub_key(const DSA *dsa, const BIGNUM *pub_key, int *ret)
+{
+    return ffc_validate_public_key(&dsa->params, pub_key, ret);
+}
+
+/*
+ * See SP800-56Ar3 Section 5.6.2.3.1 : FFC Partial public key validation.
+ * To only be used with ephemeral FFC public keys generated using the approved
+ * safe-prime groups.
+ */
+int dsa_check_pub_key_partial(const DSA *dsa, const BIGNUM *pub_key, int *ret)
+{
+    return ffc_validate_public_key_partial(&dsa->params, pub_key, ret);
+}
+
+int dsa_check_priv_key(const DSA *dsa, const BIGNUM *priv_key, int *ret)
+{
+    *ret = 0;
+
+    return (dsa->params.q != NULL
+            && ffc_validate_private_key(dsa->params.q, priv_key, ret));
+}
+
+/*
+ * FFC pairwise check from SP800-56A R3.
+ *    Section 5.6.2.1.4 Owner Assurance of Pair-wise Consistency
+ */
+int dsa_check_pairwise(const DSA *dsa)
+{
+    int ret = 0;
+    BN_CTX *ctx = NULL;
+    BIGNUM *pub_key = NULL;
+
+    if (dsa->params.p == NULL
+        || dsa->params.g == NULL
+        || dsa->priv_key == NULL
+        || dsa->pub_key == NULL)
+        return 0;
+
+    ctx = BN_CTX_new_ex(dsa->libctx);
+    if (ctx == NULL)
+        goto err;
+    pub_key = BN_new();
+    if (pub_key == NULL)
+        goto err;
+
+    /* recalculate the public key = (g ^ priv) mod p */
+    if (!dsa_generate_public_key(ctx, dsa, dsa->priv_key, pub_key))
+        goto err;
+    /* check it matches the existing pubic_key */
+    ret = BN_cmp(pub_key, dsa->pub_key) == 0;
+err:
+    BN_free(pub_key);
+    BN_CTX_free(ctx);
+    return ret;
+}