diff options
Diffstat (limited to 'lcrypt')
| -rw-r--r-- | lcrypt/lcrypt_rsa.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/lcrypt/lcrypt_rsa.c b/lcrypt/lcrypt_rsa.c deleted file mode 100644 index 77ea4a2..0000000 --- a/lcrypt/lcrypt_rsa.c +++ /dev/null @@ -1,115 +0,0 @@ -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" -""; |