zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/ec/ecdh_kdf.c b/ap/lib/libssl/openssl-1.1.1o/crypto/ec/ecdh_kdf.c
new file mode 100644
index 0000000..96efac6
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/ec/ecdh_kdf.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2015-2018 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 <string.h>
+#include <openssl/ec.h>
+#include <openssl/evp.h>
+#include "ec_local.h"
+
+/* Key derivation function from X9.63/SECG */
+/* Way more than we will ever need */
+#define ECDH_KDF_MAX (1 << 30)
+
+int ecdh_KDF_X9_63(unsigned char *out, size_t outlen,
+ const unsigned char *Z, size_t Zlen,
+ const unsigned char *sinfo, size_t sinfolen,
+ const EVP_MD *md)
+{
+ EVP_MD_CTX *mctx = NULL;
+ int rv = 0;
+ unsigned int i;
+ size_t mdlen;
+ unsigned char ctr[4];
+ if (sinfolen > ECDH_KDF_MAX || outlen > ECDH_KDF_MAX
+ || Zlen > ECDH_KDF_MAX)
+ return 0;
+ mctx = EVP_MD_CTX_new();
+ if (mctx == NULL)
+ return 0;
+ mdlen = EVP_MD_size(md);
+ for (i = 1;; i++) {
+ unsigned char mtmp[EVP_MAX_MD_SIZE];
+ if (!EVP_DigestInit_ex(mctx, md, NULL))
+ goto err;
+ ctr[3] = i & 0xFF;
+ ctr[2] = (i >> 8) & 0xFF;
+ ctr[1] = (i >> 16) & 0xFF;
+ ctr[0] = (i >> 24) & 0xFF;
+ if (!EVP_DigestUpdate(mctx, Z, Zlen))
+ goto err;
+ if (!EVP_DigestUpdate(mctx, ctr, sizeof(ctr)))
+ goto err;
+ if (!EVP_DigestUpdate(mctx, sinfo, sinfolen))
+ goto err;
+ if (outlen >= mdlen) {
+ if (!EVP_DigestFinal(mctx, out, NULL))
+ goto err;
+ outlen -= mdlen;
+ if (outlen == 0)
+ break;
+ out += mdlen;
+ } else {
+ if (!EVP_DigestFinal(mctx, mtmp, NULL))
+ goto err;
+ memcpy(out, mtmp, outlen);
+ OPENSSL_cleanse(mtmp, mdlen);
+ break;
+ }
+ }
+ rv = 1;
+ err:
+ EVP_MD_CTX_free(mctx);
+ return rv;
+}
+
+/*-
+ * The old name for ecdh_KDF_X9_63
+ * Retained for ABI compatibility
+ */
+int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
+ const unsigned char *Z, size_t Zlen,
+ const unsigned char *sinfo, size_t sinfolen,
+ const EVP_MD *md)
+{
+ return ecdh_KDF_X9_63(out, outlen, Z, Zlen, sinfo, sinfolen, md);
+}