mirrors/prosody
1
0
Fork 0
mirror of https://github.com/bjc/prosody.git synced 2025-04-04 13:47:41 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

util.hmac, util.hashes: Implement HMAC functions in C, and move to util.hashes

Browse source
This commit is contained in:
Florian Zeitz 2013-04-27 17:01:31 +02:00
parent a7340fef1c
commit 1dc0a831cf
5 changed files with 105 additions and 75 deletions
Download patch file Download diff file Expand all files Collapse all files

111
util-src/hashes.c
View file

@ -20,8 +20,11 @@
#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];
@ -34,14 +37,13 @@ static int myFunc(lua_State *L) { \
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; \
}
@ -53,15 +55,96 @@ MAKE_HASH_FUNCTION(Lsha384, SHA384, SHA384_DIGEST_LENGTH)
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)