#include <openssl/sha.h>
#include <openssl/md5.h>
-const char* hex_tab = "0123456789abcdef";
-void toHex(const char* in, int length, char* out) {
+#define HMAC_IPAD 0x36363636
+#define HMAC_OPAD 0x5c5c5c5c
+
+const char *hex_tab = "0123456789abcdef";
+void toHex(const unsigned char *in, int length, unsigned char *out) {
int i;
for (i = 0; i < length; i++) {
out[i*2] = hex_tab[(in[i] >> 4) & 0xF];
size_t len; \
const char *s = luaL_checklstring(L, 1, &len); \
int hex_out = lua_toboolean(L, 2); \
- char hash[size]; \
- char result[size*2]; \
- func((const unsigned char*)s, len, (unsigned char*)hash); \
+ unsigned char hash[size], result[size*2]; \
+ func((const unsigned char*)s, len, hash); \
if (hex_out) { \
toHex(hash, size, result); \
- lua_pushlstring(L, result, size*2); \
+ lua_pushlstring(L, (char*)result, size*2); \
} else { \
- lua_pushlstring(L, hash, size);\
+ lua_pushlstring(L, (char*)hash, size);\
} \
return 1; \
}
MAKE_HASH_FUNCTION(Lsha512, SHA512, SHA512_DIGEST_LENGTH)
MAKE_HASH_FUNCTION(Lmd5, MD5, MD5_DIGEST_LENGTH)
+struct hash_desc {
+ int (*Init)(void*);
+ int (*Update)(void*, const void *, size_t);
+ int (*Final)(unsigned char*, void*);
+ size_t digestLength;
+ void *ctx, *ctxo;
+};
+
+static void hmac(struct hash_desc *desc, const char *key, size_t key_len,
+ const char *msg, size_t msg_len, unsigned char *result)
+{
+ union xory {
+ unsigned char bytes[64];
+ uint32_t quadbytes[16];
+ };
+
+ int i;
+ char hashedKey[64]; /* Maximum used digest length */
+ union xory k_ipad, k_opad;
+
+ if (key_len > 64) {
+ desc->Init(desc->ctx);
+ desc->Update(desc->ctx, key, key_len);
+ desc->Final(desc->ctx, hashedKey);
+ key = (const char*)hashedKey;
+ key_len = desc->digestLength;
+ }
+
+ memcpy(k_ipad.bytes, key, key_len);
+ memset(k_ipad.bytes + key_len, 0, 64 - key_len);
+ memcpy(k_opad.bytes, k_ipad.bytes, 64);
+
+ for (i = 0; i < 16; i++) {
+ k_ipad.quadbytes[i] ^= HMAC_IPAD;
+ k_opad.quadbytes[i] ^= HMAC_OPAD;
+ }
+
+ desc->Init(desc->ctx);
+ desc->Update(desc->ctx, k_ipad.bytes, 64);
+ desc->Init(desc->ctxo);
+ desc->Update(desc->ctxo, k_opad.bytes, 64);
+ desc->Update(desc->ctx, msg, msg_len);
+ desc->Final(result, desc->ctx);
+ desc->Update(desc->ctxo, result, desc->digestLength);
+ desc->Final(result, desc->ctxo);
+}
+
+#define MAKE_HMAC_FUNCTION(myFunc, func, size, type) \
+static int myFunc(lua_State *L) { \
+ type ctx, ctxo; \
+ unsigned char hash[size], result[2*size]; \
+ size_t key_len, msg_len; \
+ const char *key = luaL_checklstring(L, 1, &key_len); \
+ const char *msg = luaL_checklstring(L, 2, &msg_len); \
+ const int hex_out = lua_toboolean(L, 3); \
+ struct hash_desc desc; \
+ desc.Init = (int (*)(void*))func##_Init; \
+ desc.Update = (int (*)(void*, const void *, size_t))func##_Update; \
+ desc.Final = (int (*)(unsigned char*, void*))func##_Final; \
+ desc.digestLength = size; \
+ desc.ctx = &ctx; \
+ desc.ctxo = &ctxo; \
+ hmac(&desc, key, key_len, msg, msg_len, hash); \
+ if (hex_out) { \
+ toHex(hash, size, result); \
+ lua_pushlstring(L, (char*)result, size*2); \
+ } else { \
+ lua_pushlstring(L, (char*)hash, size); \
+ } \
+ return 1; \
+}
+
+MAKE_HMAC_FUNCTION(Lhmac_sha1, SHA1, SHA_DIGEST_LENGTH, SHA_CTX)
+MAKE_HMAC_FUNCTION(Lhmac_sha256, SHA256, SHA256_DIGEST_LENGTH, SHA256_CTX)
+MAKE_HMAC_FUNCTION(Lhmac_sha512, SHA512, SHA512_DIGEST_LENGTH, SHA512_CTX)
+MAKE_HMAC_FUNCTION(Lhmac_md5, MD5, MD5_DIGEST_LENGTH, MD5_CTX)
+
static const luaL_Reg Reg[] =
{
- { "sha1", Lsha1 },
- { "sha224", Lsha224 },
- { "sha256", Lsha256 },
- { "sha384", Lsha384 },
- { "sha512", Lsha512 },
- { "md5", Lmd5 },
- { NULL, NULL }
+ { "sha1", Lsha1 },
+ { "sha224", Lsha224 },
+ { "sha256", Lsha256 },
+ { "sha384", Lsha384 },
+ { "sha512", Lsha512 },
+ { "md5", Lmd5 },
+ { "hmac_sha1", Lhmac_sha1 },
+ { "hmac_sha256", Lhmac_sha256 },
+ { "hmac_sha512", Lhmac_sha512 },
+ { "hmac_md5", Lhmac_md5 },
+ { NULL, NULL }
};
LUALIB_API int luaopen_util_hashes(lua_State *L)
-- COPYING file in the source package for more information.
--
-local hashes = require "util.hashes"
-
-local s_char = string.char;
-local s_gsub = string.gsub;
-local s_rep = string.rep;
-
-module "hmac"
-
-local xor_map = {0;1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;1;0;3;2;5;4;7;6;9;8;11;10;13;12;15;14;2;3;0;1;6;7;4;5;10;11;8;9;14;15;12;13;3;2;1;0;7;6;5;4;11;10;9;8;15;14;13;12;4;5;6;7;0;1;2;3;12;13;14;15;8;9;10;11;5;4;7;6;1;0;3;2;13;12;15;14;9;8;11;10;6;7;4;5;2;3;0;1;14;15;12;13;10;11;8;9;7;6;5;4;3;2;1;0;15;14;13;12;11;10;9;8;8;9;10;11;12;13;14;15;0;1;2;3;4;5;6;7;9;8;11;10;13;12;15;14;1;0;3;2;5;4;7;6;10;11;8;9;14;15;12;13;2;3;0;1;6;7;4;5;11;10;9;8;15;14;13;12;3;2;1;0;7;6;5;4;12;13;14;15;8;9;10;11;4;5;6;7;0;1;2;3;13;12;15;14;9;8;11;10;5;4;7;6;1;0;3;2;14;15;12;13;10;11;8;9;6;7;4;5;2;3;0;1;15;14;13;12;11;10;9;8;7;6;5;4;3;2;1;0;};
-local function xor(x, y)
- local lowx, lowy = x % 16, y % 16;
- local hix, hiy = (x - lowx) / 16, (y - lowy) / 16;
- local lowr, hir = xor_map[lowx * 16 + lowy + 1], xor_map[hix * 16 + hiy + 1];
- local r = hir * 16 + lowr;
- return r;
-end
-local opadc, ipadc = s_char(0x5c), s_char(0x36);
-local ipad_map = {};
-local opad_map = {};
-for i=0,255 do
- ipad_map[s_char(i)] = s_char(xor(0x36, i));
- opad_map[s_char(i)] = s_char(xor(0x5c, i));
-end
-
---[[
-key
- the key to use in the hash
-message
- the message to hash
-hash
- the hash function
-blocksize
- the blocksize for the hash function in bytes
-hex
- return raw hash or hexadecimal string
---]]
-function hmac(key, message, hash, blocksize, hex)
- if #key > blocksize then
- key = hash(key)
- end
+-- COMPAT: Only for external pre-0.9 modules
- local padding = blocksize - #key;
- local ipad = s_gsub(key, ".", ipad_map)..s_rep(ipadc, padding);
- local opad = s_gsub(key, ".", opad_map)..s_rep(opadc, padding);
-
- return hash(opad..hash(ipad..message), hex)
-end
-
-function md5(key, message, hex)
- return hmac(key, message, hashes.md5, 64, hex)
-end
-
-function sha1(key, message, hex)
- return hmac(key, message, hashes.sha1, 64, hex)
-end
-
-function sha256(key, message, hex)
- return hmac(key, message, hashes.sha256, 64, hex)
-end
+local hashes = require "util.hashes"
-return _M
+return { md5 = hashes.hmac_md5,
+ sha1 = hashes.hmac_sha1,
+ sha256 = hashes.hmac_sha256 };
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