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/*
See license.txt in the root of this project.
*/
# include "luametatex.h"
# include <utilsha.h>
# define SHA256_RESULT_LENGTH (SHA256_STRING_LENGTH-1)
# define SHA384_RESULT_LENGTH (SHA384_STRING_LENGTH-1)
# define SHA512_RESULT_LENGTH (SHA512_STRING_LENGTH-1)
# define sha2_body(SHA_DIGEST_LENGTH, SHA_CALCULATE, CONVERSION, SHA_RESULT_LENGTH) do { \
if (lua_type(L, 1) == LUA_TSTRING) { \
uint8_t result[SHA_DIGEST_LENGTH]; \
size_t size = 0; \
const char *data = lua_tolstring(L, 1, &size); \
SHA_CALCULATE(data, size, result, CONVERSION); \
lua_pushlstring(L, (const char *) result, SHA_RESULT_LENGTH); \
return 1; \
} \
return 0; \
} while (0)
static int sha2lib_256_sum(lua_State *L) { sha2_body(SHA256_DIGEST_LENGTH, sha256_digest, SHA_BYTES, SHA256_DIGEST_LENGTH); }
static int sha2lib_384_sum(lua_State *L) { sha2_body(SHA384_DIGEST_LENGTH, sha384_digest, SHA_BYTES, SHA384_DIGEST_LENGTH); }
static int sha2lib_512_sum(lua_State *L) { sha2_body(SHA512_DIGEST_LENGTH, sha512_digest, SHA_BYTES, SHA512_DIGEST_LENGTH); }
static int sha2lib_256_hex(lua_State *L) { sha2_body(SHA256_STRING_LENGTH, sha256_digest, SHA_LCHEX, SHA256_RESULT_LENGTH); }
static int sha2lib_384_hex(lua_State *L) { sha2_body(SHA384_STRING_LENGTH, sha384_digest, SHA_LCHEX, SHA384_RESULT_LENGTH); }
static int sha2lib_512_hex(lua_State *L) { sha2_body(SHA512_STRING_LENGTH, sha512_digest, SHA_LCHEX, SHA512_RESULT_LENGTH); }
static int sha2lib_256_HEX(lua_State *L) { sha2_body(SHA256_STRING_LENGTH, sha256_digest, SHA_UCHEX, SHA256_RESULT_LENGTH); }
static int sha2lib_384_HEX(lua_State *L) { sha2_body(SHA384_STRING_LENGTH, sha384_digest, SHA_UCHEX, SHA384_RESULT_LENGTH); }
static int sha2lib_512_HEX(lua_State *L) { sha2_body(SHA512_STRING_LENGTH, sha512_digest, SHA_UCHEX, SHA512_RESULT_LENGTH); }
static struct luaL_Reg sha2lib_function_list[] = {
/*tex We started out with this: */
{ "digest256", sha2lib_256_sum },
{ "digest384", sha2lib_384_sum },
{ "digest512", sha2lib_512_sum },
/*tex The next is consistent with |md5lib|: */
{ "sum256", sha2lib_256_sum },
{ "sum384", sha2lib_384_sum },
{ "sum512", sha2lib_512_sum },
{ "hex256", sha2lib_256_hex },
{ "hex384", sha2lib_384_hex },
{ "hex512", sha2lib_512_hex },
{ "HEX256", sha2lib_256_HEX },
{ "HEX384", sha2lib_384_HEX },
{ "HEX512", sha2lib_512_HEX },
{ NULL, NULL },
};
int luaopen_sha2(lua_State *L) {
lua_newtable(L);
luaL_setfuncs(L, sha2lib_function_list, 0);
return 1;
}
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