diff options
Diffstat (limited to 'util-src/hashes.c')
| -rw-r--r-- | util-src/hashes.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/util-src/hashes.c b/util-src/hashes.c index 4c48b26f..3fb849b9 100644 --- a/util-src/hashes.c +++ b/util-src/hashes.c @@ -100,36 +100,39 @@ MAKE_HMAC_FUNCTION(Lhmac_sha512, EVP_sha512, SHA512_DIGEST_LENGTH, SHA512_CTX) MAKE_HMAC_FUNCTION(Lhmac_md5, EVP_md5, MD5_DIGEST_LENGTH, MD5_CTX) static int Lpbkdf2_sha1(lua_State *L) { - unsigned char out[SHA_DIGEST_LENGTH]; - size_t pass_len, salt_len; const char *pass = luaL_checklstring(L, 1, &pass_len); const unsigned char *salt = (unsigned char *)luaL_checklstring(L, 2, &salt_len); const int iter = luaL_checkinteger(L, 3); + const size_t len = luaL_optinteger(L, 4, SHA_DIGEST_LENGTH); + + luaL_Buffer b; + unsigned char *out = (unsigned char *)luaL_buffinitsize(L, &b, len); - if(PKCS5_PBKDF2_HMAC(pass, pass_len, salt, salt_len, iter, EVP_sha1(), SHA_DIGEST_LENGTH, out) == 0) { + if(PKCS5_PBKDF2_HMAC(pass, pass_len, salt, salt_len, iter, EVP_sha1(), len, out) == 0) { return luaL_error(L, "PKCS5_PBKDF2_HMAC() failed"); } - lua_pushlstring(L, (char *)out, SHA_DIGEST_LENGTH); - + luaL_pushresultsize(&b, len); return 1; } static int Lpbkdf2_sha256(lua_State *L) { - unsigned char out[SHA256_DIGEST_LENGTH]; - size_t pass_len, salt_len; const char *pass = luaL_checklstring(L, 1, &pass_len); const unsigned char *salt = (unsigned char *)luaL_checklstring(L, 2, &salt_len); const int iter = luaL_checkinteger(L, 3); + const int len = luaL_optinteger(L, 4, SHA256_DIGEST_LENGTH); + + luaL_Buffer b; + unsigned char *out = (unsigned char *)luaL_buffinitsize(L, &b, len); - if(PKCS5_PBKDF2_HMAC(pass, pass_len, salt, salt_len, iter, EVP_sha256(), SHA256_DIGEST_LENGTH, out) == 0) { + if(PKCS5_PBKDF2_HMAC(pass, pass_len, salt, salt_len, iter, EVP_sha256(), len, out) == 0) { return luaL_error(L, "PKCS5_PBKDF2_HMAC() failed"); } - lua_pushlstring(L, (char *)out, SHA_DIGEST_LENGTH); + luaL_pushresultsize(&b, len); return 1; } |