50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
// SPDX-FileCopyrightText: 2016-2021 Leonardo Mörlein <git@irrelefant.net>
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// SPDX-License-Identifier: MIT License
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#include <libubox/md5.h>
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#include <lua.h>
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#include <lauxlib.h>
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#include <lualib.h>
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#include <stdlib.h>
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#include <string.h>
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#define MD5_DIGEST_LEN 16
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#define MD5_STRLEN (2*MD5_DIGEST_LEN+1)
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static int md5(lua_State *L) {
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size_t len;
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const char *input = lua_tolstring(L, 1, &len);
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if (input == NULL) {
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lua_pushstring(L, "first argument: should be the input string");
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lua_error(L);
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__builtin_unreachable();
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}
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unsigned char digest[MD5_DIGEST_LEN];
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char output[MD5_STRLEN];
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struct md5_ctx ctx;
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md5_begin(&ctx);
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md5_hash(input, len, &ctx);
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md5_end(digest, &ctx);
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// fill the digest bytewise in the output string
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int i;
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for (i = 0; i < MD5_DIGEST_LEN; i++) {
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sprintf(output + 2*i, "%02x", digest[i]);
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}
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lua_pushstring(L, output);
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return 1;
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}
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static const luaL_Reg R[] = {
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{"md5", md5},
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{NULL, NULL },
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};
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LUALIB_API int luaopen_hash(lua_State *L) {
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luaL_register(L, "hash", R);
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return 1;
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}
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