Upgrade openssl from 1.1.0e to 1.1.1b, with source code. 4.0.78

trunk/3rdparty/openssl-1.1-fit/crypto/dh/dh_key.c

@@ -0,0 +1,232 @@
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 "dh_locl.h"
+#include "internal/bn_int.h"
+
+static int generate_key(DH *dh);
+static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
+static int dh_bn_mod_exp(const DH *dh, BIGNUM *r,
+                         const BIGNUM *a, const BIGNUM *p,
+                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
+static int dh_init(DH *dh);
+static int dh_finish(DH *dh);
+
+int DH_generate_key(DH *dh)
+{
+    return dh->meth->generate_key(dh);
+}
+
+int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
+{
+    return dh->meth->compute_key(key, pub_key, dh);
+}
+
+int DH_compute_key_padded(unsigned char *key, const BIGNUM *pub_key, DH *dh)
+{
+    int rv, pad;
+    rv = dh->meth->compute_key(key, pub_key, dh);
+    if (rv <= 0)
+        return rv;
+    pad = BN_num_bytes(dh->p) - rv;
+    if (pad > 0) {
+        memmove(key + pad, key, rv);
+        memset(key, 0, pad);
+    }
+    return rv + pad;
+}
+
+static DH_METHOD dh_ossl = {
+    "OpenSSL DH Method",
+    generate_key,
+    compute_key,
+    dh_bn_mod_exp,
+    dh_init,
+    dh_finish,
+    DH_FLAG_FIPS_METHOD,
+    NULL,
+    NULL
+};
+
+static const DH_METHOD *default_DH_method = &dh_ossl;
+
+const DH_METHOD *DH_OpenSSL(void)
+{
+    return &dh_ossl;
+}
+
+void DH_set_default_method(const DH_METHOD *meth)
+{
+    default_DH_method = meth;
+}
+
+const DH_METHOD *DH_get_default_method(void)
+{
+    return default_DH_method;
+}
+
+static int generate_key(DH *dh)
+{
+    int ok = 0;
+    int generate_new_key = 0;
+    unsigned l;
+    BN_CTX *ctx = NULL;
+    BN_MONT_CTX *mont = NULL;
+    BIGNUM *pub_key = NULL, *priv_key = NULL;
+
+    if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS) {
+        DHerr(DH_F_GENERATE_KEY, DH_R_MODULUS_TOO_LARGE);
+        return 0;
+    }
+
+    ctx = BN_CTX_new();
+    if (ctx == NULL)
+        goto err;
+
+    if (dh->priv_key == NULL) {
+        priv_key = BN_secure_new();
+        if (priv_key == NULL)
+            goto err;
+        generate_new_key = 1;
+    } else
+        priv_key = dh->priv_key;
+
+    if (dh->pub_key == NULL) {
+        pub_key = BN_new();
+        if (pub_key == NULL)
+            goto err;
+    } else
+        pub_key = dh->pub_key;
+
+    if (dh->flags & DH_FLAG_CACHE_MONT_P) {
+        mont = BN_MONT_CTX_set_locked(&dh->method_mont_p,
+                                      dh->lock, dh->p, ctx);
+        if (!mont)
+            goto err;
+    }
+
+    if (generate_new_key) {
+        if (dh->q) {
+            do {
+                if (!BN_priv_rand_range(priv_key, dh->q))
+                    goto err;
+            }
+            while (BN_is_zero(priv_key) || BN_is_one(priv_key));
+        } else {
+            /* secret exponent length */
+            l = dh->length ? dh->length : BN_num_bits(dh->p) - 1;
+            if (!BN_priv_rand(priv_key, l, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY))
+                goto err;
+        }
+    }
+
+    {
+        BIGNUM *prk = BN_new();
+
+        if (prk == NULL)
+            goto err;
+        BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
+
+        if (!dh->meth->bn_mod_exp(dh, pub_key, dh->g, prk, dh->p, ctx, mont)) {
+            BN_free(prk);
+            goto err;
+        }
+        /* We MUST free prk before any further use of priv_key */
+        BN_free(prk);
+    }
+
+    dh->pub_key = pub_key;
+    dh->priv_key = priv_key;
+    ok = 1;
+ err:
+    if (ok != 1)
+        DHerr(DH_F_GENERATE_KEY, ERR_R_BN_LIB);
+
+    if (pub_key != dh->pub_key)
+        BN_free(pub_key);
+    if (priv_key != dh->priv_key)
+        BN_free(priv_key);
+    BN_CTX_free(ctx);
+    return ok;
+}
+
+static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
+{
+    BN_CTX *ctx = NULL;
+    BN_MONT_CTX *mont = NULL;
+    BIGNUM *tmp;
+    int ret = -1;
+    int check_result;
+
+    if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS) {
+        DHerr(DH_F_COMPUTE_KEY, DH_R_MODULUS_TOO_LARGE);
+        goto err;
+    }
+
+    ctx = BN_CTX_new();
+    if (ctx == NULL)
+        goto err;
+    BN_CTX_start(ctx);
+    tmp = BN_CTX_get(ctx);
+    if (tmp == NULL)
+        goto err;
+
+    if (dh->priv_key == NULL) {
+        DHerr(DH_F_COMPUTE_KEY, DH_R_NO_PRIVATE_VALUE);
+        goto err;
+    }
+
+    if (dh->flags & DH_FLAG_CACHE_MONT_P) {
+        mont = BN_MONT_CTX_set_locked(&dh->method_mont_p,
+                                      dh->lock, dh->p, ctx);
+        BN_set_flags(dh->priv_key, BN_FLG_CONSTTIME);
+        if (!mont)
+            goto err;
+    }
+
+    if (!DH_check_pub_key(dh, pub_key, &check_result) || check_result) {
+        DHerr(DH_F_COMPUTE_KEY, DH_R_INVALID_PUBKEY);
+        goto err;
+    }
+
+    if (!dh->
+        meth->bn_mod_exp(dh, tmp, pub_key, dh->priv_key, dh->p, ctx, mont)) {
+        DHerr(DH_F_COMPUTE_KEY, ERR_R_BN_LIB);
+        goto err;
+    }
+
+    ret = BN_bn2bin(tmp, key);
+ err:
+    if (ctx != NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+    }
+    return ret;
+}
+
+static int dh_bn_mod_exp(const DH *dh, BIGNUM *r,
+                         const BIGNUM *a, const BIGNUM *p,
+                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
+{
+    return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx);
+}
+
+static int dh_init(DH *dh)
+{
+    dh->flags |= DH_FLAG_CACHE_MONT_P;
+    return 1;
+}
+
+static int dh_finish(DH *dh)
+{
+    BN_MONT_CTX_free(dh->method_mont_p);
+    return 1;
+}