zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/dsa/dsa_key.c b/ap/lib/libssl/openssl-1.1.1o/crypto/dsa/dsa_key.c
new file mode 100644
index 0000000..bdeddd4
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/dsa/dsa_key.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright 1995-2016 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 <time.h>
+#include "internal/cryptlib.h"
+#include <openssl/bn.h>
+#include "dsa_local.h"
+
+static int dsa_builtin_keygen(DSA *dsa);
+
+int DSA_generate_key(DSA *dsa)
+{
+ if (dsa->meth->dsa_keygen)
+ return dsa->meth->dsa_keygen(dsa);
+ return dsa_builtin_keygen(dsa);
+}
+
+static int dsa_builtin_keygen(DSA *dsa)
+{
+ int ok = 0;
+ BN_CTX *ctx = NULL;
+ BIGNUM *pub_key = NULL, *priv_key = NULL;
+
+ if ((ctx = BN_CTX_new()) == NULL)
+ goto err;
+
+ if (dsa->priv_key == NULL) {
+ if ((priv_key = BN_secure_new()) == NULL)
+ goto err;
+ } else
+ priv_key = dsa->priv_key;
+
+ do
+ if (!BN_priv_rand_range(priv_key, dsa->q))
+ goto err;
+ while (BN_is_zero(priv_key)) ;
+
+ if (dsa->pub_key == NULL) {
+ if ((pub_key = BN_new()) == NULL)
+ goto err;
+ } else
+ pub_key = dsa->pub_key;
+
+ {
+ BIGNUM *prk = BN_new();
+
+ if (prk == NULL)
+ goto err;
+ BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
+
+ if (!BN_mod_exp(pub_key, dsa->g, prk, dsa->p, ctx)) {
+ BN_free(prk);
+ goto err;
+ }
+ /* We MUST free prk before any further use of priv_key */
+ BN_free(prk);
+ }
+
+ dsa->priv_key = priv_key;
+ dsa->pub_key = pub_key;
+ ok = 1;
+
+ err:
+ if (pub_key != dsa->pub_key)
+ BN_free(pub_key);
+ if (priv_key != dsa->priv_key)
+ BN_free(priv_key);
+ BN_CTX_free(ctx);
+ return ok;
+}