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authorFlorian Zeitz <florob@babelmonkeys.de>2013-04-28 02:28:42 +0200
committerFlorian Zeitz <florob@babelmonkeys.de>2013-04-28 02:28:42 +0200
commitb6199cf81a4c1fd605a84be830e3ee5d8aff639b (patch)
tree902b97c09c14427e90b5c8b1bf056d54f1650397 /util-src/hashes.c
parent1dc0a831cfd7372d5d76c54bd897e93c198a3a37 (diff)
downloadprosody-b6199cf81a4c1fd605a84be830e3ee5d8aff639b.tar.gz
prosody-b6199cf81a4c1fd605a84be830e3ee5d8aff639b.zip
util.hashes, util.sasl.scram: Implement SCRAM-SHA1's Hi in C
Diffstat (limited to 'util-src/hashes.c')
-rw-r--r--util-src/hashes.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/util-src/hashes.c b/util-src/hashes.c
index 2a6625b3..8f7d7140 100644
--- a/util-src/hashes.c
+++ b/util-src/hashes.c
@@ -14,6 +14,8 @@
*/
#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
#include "lua.h"
#include "lauxlib.h"
@@ -132,6 +134,52 @@ 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 int LscramHi(lua_State *L) {
+ union xory {
+ unsigned char bytes[SHA_DIGEST_LENGTH];
+ uint32_t quadbytes[SHA_DIGEST_LENGTH/4];
+ };
+ int i;
+ SHA_CTX ctx, ctxo;
+ unsigned char Ust[SHA_DIGEST_LENGTH];
+ union xory Und;
+ union xory res;
+ size_t str_len, salt_len;
+ struct hash_desc desc;
+ const char *str = luaL_checklstring(L, 1, &str_len);
+ const char *salt = luaL_checklstring(L, 2, &salt_len);
+ char *salt2;
+ const int iter = luaL_checkinteger(L, 3);
+
+ desc.Init = (int (*)(void*))SHA1_Init;
+ desc.Update = (int (*)(void*, const void *, size_t))SHA1_Update;
+ desc.Final = (int (*)(unsigned char*, void*))SHA1_Final;
+ desc.digestLength = SHA_DIGEST_LENGTH;
+ desc.ctx = &ctx;
+ desc.ctxo = &ctxo;
+
+ salt2 = malloc(salt_len + 4);
+ if (salt2 == NULL)
+ luaL_error(L, "Out of memory in scramHi");
+ memcpy(salt2, salt, salt_len);
+ memcpy(salt2 + salt_len, "\0\0\0\1", 4);
+ hmac(&desc, str, str_len, salt2, salt_len + 4, Ust);
+ free(salt2);
+
+ memcpy(res.bytes, Ust, sizeof(res));
+ for (i = 1; i < iter; i++) {
+ int j;
+ hmac(&desc, str, str_len, (char*)Ust, sizeof(Ust), Und.bytes);
+ for (j = 0; j < SHA_DIGEST_LENGTH/4; j++)
+ res.quadbytes[j] ^= Und.quadbytes[j];
+ memcpy(Ust, Und.bytes, sizeof(Ust));
+ }
+
+ lua_pushlstring(L, (char*)res.bytes, SHA_DIGEST_LENGTH);
+
+ return 1;
+}
+
static const luaL_Reg Reg[] =
{
{ "sha1", Lsha1 },
@@ -144,6 +192,7 @@ static const luaL_Reg Reg[] =
{ "hmac_sha256", Lhmac_sha256 },
{ "hmac_sha512", Lhmac_sha512 },
{ "hmac_md5", Lhmac_md5 },
+ { "scram_Hi_sha1", LscramHi },
{ NULL, NULL }
};