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diff --git a/modules/lua/lua_passwd.h b/modules/lua/lua_passwd.h
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _LUA_PASSWD_H
+#define _LUA_PASSWD_H
+
+#include "apr.h"
+#include "apr_lib.h"
+#include "apr_strings.h"
+#include "apr_errno.h"
+#include "apr_file_io.h"
+#include "apr_general.h"
+#include "apr_version.h"
+#if !APR_VERSION_AT_LEAST(2,0,0)
+#include "apu_version.h"
+#endif
+
+#define MAX_PASSWD_LEN 256
+
+#define ALG_APMD5 0
+#define ALG_APSHA 1
+#define ALG_BCRYPT 2
+#define ALG_CRYPT 3
+
+#define BCRYPT_DEFAULT_COST 5
+
+#define ERR_FILEPERM 1
+#define ERR_SYNTAX 2
+#define ERR_PWMISMATCH 3
+#define ERR_INTERRUPTED 4
+#define ERR_OVERFLOW 5
+#define ERR_BADUSER 6
+#define ERR_INVALID 7
+#define ERR_RANDOM 8
+#define ERR_GENERAL 9
+#define ERR_ALG_NOT_SUPP 10
+
+#if defined(WIN32) || defined(NETWARE)
+#define CRYPT_ALGO_SUPPORTED 0
+#define PLAIN_ALGO_SUPPORTED 1
+#else
+#define CRYPT_ALGO_SUPPORTED 1
+#define PLAIN_ALGO_SUPPORTED 0
+#endif
+
+#if APR_VERSION_AT_LEAST(2,0,0) || \
+ (APU_MAJOR_VERSION == 1 && APU_MINOR_VERSION >= 5)
+#define BCRYPT_ALGO_SUPPORTED 1
+#else
+#define BCRYPT_ALGO_SUPPORTED 0
+#endif
+
+typedef struct passwd_ctx passwd_ctx;
+
+struct passwd_ctx {
+ apr_pool_t *pool;
+ const char *errstr;
+ char *out;
+ apr_size_t out_len;
+ char *passwd;
+ int alg;
+ int cost;
+};
+
+
+/*
+ * The following functions return zero on success; otherwise, one of
+ * the ERR_* codes is returned and an error message is stored in ctx->errstr.
+ */
+
+/*
+ * Make a password record from the given information.
+ */
+int mk_password_hash(passwd_ctx *ctx);
+
+#endif /* _LUA_PASSWD_H */
+