diff options
| -rw-r--r-- | lcrypt/Makefile | 2 | ||||
| -rw-r--r-- | lcrypt/lcrypt.c | 1 | ||||
| -rw-r--r-- | lcrypt/lcrypt_rsa.c | 115 | ||||
| -rw-r--r-- | src/BLua.cc | 2 |
4 files changed, 119 insertions, 1 deletions
diff --git a/lcrypt/Makefile b/lcrypt/Makefile index ea1ac3b..0347ee8 100644 --- a/lcrypt/Makefile +++ b/lcrypt/Makefile @@ -1,6 +1,6 @@ CFLAGS += -O3 -Wall -DLITTLE_ENDIAN -DLTM_DESC -DLTC_SOURCE -DUSE_LTM -fPIC -I$(TOMCRYPT)/src/headers -I$(LUA)/src -I../src -lcrypt.o: lcrypt.c lcrypt_ciphers.c lcrypt_hashes.c lcrypt_math.c lcrypt_bits.c +lcrypt.o: lcrypt.c lcrypt_ciphers.c lcrypt_hashes.c lcrypt_math.c lcrypt_bits.c lcrypt_rsa.c $(CC) $(CFLAGS) -c lcrypt.c -o $@ clean: diff --git a/lcrypt/lcrypt.c b/lcrypt/lcrypt.c index d757f11..ed514dd 100644 --- a/lcrypt/lcrypt.c +++ b/lcrypt/lcrypt.c @@ -54,6 +54,7 @@ static void* lcrypt_malloc(lua_State *L, size_t size) #include "lcrypt_hashes.c" #include "lcrypt_math.c" #include "lcrypt_bits.c" +#include "lcrypt_rsa.c" static int lcrypt_tohex(lua_State *L) { diff --git a/lcrypt/lcrypt_rsa.c b/lcrypt/lcrypt_rsa.c new file mode 100644 index 0000000..77ea4a2 --- /dev/null +++ b/lcrypt/lcrypt_rsa.c @@ -0,0 +1,115 @@ +const char * lcrypt_rsa = "" +"rsa = {}\n" +"\n" +"function rsa:pkcs1_pad(data, out_length)\n" +" local asn1 = string.char(0x00, 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14)\n" +" return string.char(0x00, 0x01) .. string.char(0xff):rep(out_length - #asn1 - #data - 2) .. asn1 .. data\n" +"end\n" +"\n" +"function rsa:encode_int(value, len)\n" +" local ret = ''\n" +" for i=1,len do\n" +" ret = string.char(value % 256) .. ret\n" +" value = math.floor(value / 256)\n" +" end\n" +" return ret\n" +"end\n" +"\n" +"function rsa:oaep_g(data, out_length)\n" +" local out,counter = '', 0\n" +" while #out < out_length do\n" +" out = out .. lcrypt.hashes.sha1:hash(data .. self:encode_int(counter, 4)):done()\n" +" counter = counter + 1\n" +" end\n" +" return out:sub(1, out_length)\n" +"end\n" +"\n" +"function rsa:oaep_pad(data, param, out_length)\n" +" out_length = out_length - 1\n" +" local h_length = #data\n" +" local g_length = out_length - h_length\n" +" local seed = lcrypt.random(h_length)\n" +" local c = lcrypt.hashes.sha1:hash(param):done()\n" +" c = c .. string.rep(string.char(0), g_length - h_length - 2 - #c) .. string.char(0, 1) .. data\n" +" local x = lcrypt.xor(c, self:oaep_g(seed, g_length))\n" +" local y = lcrypt.xor(seed, self:oaep_g(x, h_length))\n" +" return string.char(0) .. x .. y\n" +"end\n" +"\n" +"function rsa:oaep_unpad(data, param, out_length)\n" +" data = data:sub(2, #data)\n" +" local g_length = #data - out_length\n" +" local x = data:sub(1, g_length)\n" +" local seed = lcrypt.xor(self:oaep_g(x, out_length), data:sub(g_length +1, #data))\n" +" local c = lcrypt.xor(x, self:oaep_g(seed, g_length))\n" +" local v = lcrypt.hashes.sha1:hash(param):done()\n" +" if c:sub(1,#v) == v then return c:sub(g_length - out_length + 1, #c) end\n" +"end\n" +"\n" +"function rsa:prime(bits)\n" +" bits = math.floor(bits)\n" +" if bits < 24 then return end\n" +" local ret, high, bytes = nil, 1, math.floor((bits - 7) / 8)\n" +" for i=1,bits-bytes*8-1 do high = 1 + high + high end\n" +" high = string.char(high)\n" +" low = lcrypt.random(1):byte()\n" +" if low / 2 == math.floor(low / 2) then low = low + 1 end\n" +" low = string.char(low)\n" +" bytes = bytes - 1\n" +" repeat\n" +" ret = lcrypt.bigint(high .. lcrypt.random(bytes) .. low)\n" +" until ret.isprime\n" +" return ret\n" +"end\n" +"\n" +"function rsa:gen_key(bits, e)\n" +" local key,one,p1,q1 = { e=lcrypt.bigint(e) }, lcrypt.bigint(1), nil, nil\n" +" bits = bits / 2\n" +" repeat\n" +" key.p = self:prime(bits)\n" +" p1 = key.p - one\n" +" until p1:gcd(key.e) == one\n" +" repeat\n" +" key.q = self:prime(bits)\n" +" q1 = key.q - one\n" +" until q1:gcd(key.e) == one\n" +" key.d = key.e:invmod(p1:lcm(q1))\n" +" key.n = key.p * key.q\n" +" key.dp = key.d % p1\n" +" key.dq = key.d % q1\n" +" key.qp = key.q:invmod(key.p)\n" +" return key\n" +"end\n" +"\n" +"function rsa:private(msg, key)\n" +" msg = lcrypt.bigint(msg)\n" +" local a,b = msg:exptmod(key.dp, key.p), msg:exptmod(key.dq, key.q)\n" +" local ret = tostring(key.qp:mulmod(a - b, key.p) * key.q + b)\n" +" if ret:byte(1) == 0 then ret = ret:sub(2, #ret) end\n" +" return ret\n" +"end\n" +"\n" +"function rsa:public(msg, key)\n" +" return tostring(lcrypt.bigint(msg):exptmod(key.e, key.n))\n" +"end\n" +"\n" +"function rsa:sign_pkcs1(msg, key)\n" +" return self:private(self:pkcs1_pad(lcrypt.hashes.sha1:hash(msg):done(), key.n.bits / 8), key)\n" +"end\n" +"\n" +"function rsa:verify_pkcs1(signature, msg, key)\n" +" msg = lcrypt.hashes.sha1:hash(msg):done()\n" +" local tmp = self:public(signature, key)\n" +" if tmp:sub(#tmp - #msg + 1, #tmp) == msg then return true end\n" +"end\n" +"\n" +"function rsa:sign_oaep(msg, param, key)\n" +" return self:private(self:oaep_pad(lcrypt.hashes.sha1:hash(msg):done(), param, key.n.bits / 8), key)\n" +"end\n" +"\n" +"function rsa:verify_oaep(signature, msg, param, key)\n" +" local tmp = self:public(signature, key)\n" +" local h = self:oaep_unpad(tmp, param, 20)\n" +" if h == lcrypt.hashes.sha1:hash(msg):done() then return true end\n" +"end\n" +""; diff --git a/src/BLua.cc b/src/BLua.cc index 22252d4..4b34108 100644 --- a/src/BLua.cc +++ b/src/BLua.cc @@ -440,11 +440,13 @@ void Balau::Lua::open_bit() { extern "C" { int luaopen_lcrypt(lua_State *L); +extern const char * lcrypt_rsa; } void Balau::Lua::open_lcrypt() { int n = gettop(); luaopen_lcrypt(L); + load(lcrypt_rsa); while (n < gettop()) pop(); } |