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local test_keys = require "spec.inputs.test_keys";
describe("util.crypto", function ()
local crypto = require "util.crypto";
local random = require "util.random";
describe("generate_ed25519_keypair", function ()
local keypair = crypto.generate_ed25519_keypair();
assert.is_not_nil(keypair);
assert.equal("ED25519", keypair:get_type());
end)
describe("import_private_pem", function ()
it("can import ECDSA keys", function ()
local ecdsa_key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
assert.equal("id-ecPublicKey", ecdsa_key:get_type());
end);
it("can import EdDSA (Ed25519) keys", function ()
local ed25519_key = crypto.import_private_pem(crypto.generate_ed25519_keypair():private_pem());
assert.equal("ED25519", ed25519_key:get_type());
end);
it("can import RSA keys", function ()
-- TODO
end);
it("rejects invalid keys", function ()
assert.is_nil(crypto.import_private_pem(test_keys.eddsa_public_pem));
assert.is_nil(crypto.import_private_pem(test_keys.ecdsa_public_pem));
assert.is_nil(crypto.import_private_pem("foo"));
assert.is_nil(crypto.import_private_pem(""));
end);
end);
describe("import_public_pem", function ()
it("can import ECDSA public keys", function ()
local ecdsa_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
assert.equal("id-ecPublicKey", ecdsa_key:get_type());
end);
it("can import EdDSA (Ed25519) public keys", function ()
local ed25519_key = crypto.import_public_pem(test_keys.eddsa_public_pem);
assert.equal("ED25519", ed25519_key:get_type());
end);
it("can import RSA public keys", function ()
-- TODO
end);
end);
describe("PEM export", function ()
it("works", function ()
local ecdsa_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
assert.equal("id-ecPublicKey", ecdsa_key:get_type());
assert.equal(test_keys.ecdsa_public_pem, ecdsa_key:public_pem());
assert.has_error(function ()
-- Fails because private key is not available
ecdsa_key:private_pem();
end);
local ecdsa_private_key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
assert.equal(test_keys.ecdsa_private_pem, ecdsa_private_key:private_pem());
end);
end);
describe("sign/verify with", function ()
local test_cases = {
ed25519 = {
crypto.ed25519_sign, crypto.ed25519_verify;
key = crypto.import_private_pem(test_keys.eddsa_private_pem);
sig_length = 64;
};
ecdsa = {
crypto.ecdsa_sha256_sign, crypto.ecdsa_sha256_verify;
key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
};
};
for test_name, test in pairs(test_cases) do
local key = test.key;
describe(test_name, function ()
it("works", function ()
local sign, verify = test[1], test[2];
local sig = assert(sign(key, "Hello world"));
assert.is_string(sig);
if test.sig_length then
assert.equal(test.sig_length, #sig);
end
do
local ok = verify(key, "Hello world", sig);
assert.is_truthy(ok);
end
do -- Incorrect signature
local ok = verify(key, "Hello world", sig:sub(1, -2)..string.char((sig:byte(-1)+1)%255));
assert.is_falsy(ok);
end
do -- Incorrect message
local ok = verify(key, "Hello earth", sig);
assert.is_falsy(ok);
end
do -- Incorrect message (embedded NUL)
local ok = verify(key, "Hello world\0foo", sig);
assert.is_falsy(ok);
end
end);
end);
end
end);
describe("ECDSA signatures", function ()
local hex = require "util.hex";
local sig = hex.decode((([[
304402203e936e7b0bc62887e0e9d675afd08531a930384cfcf301
f25d13053a2ebf141d02205a5a7c7b7ac5878d004cb79b17b39346
6b0cd1043718ffc31c153b971d213a8e
]]):gsub("%s+", "")));
it("can be parsed", function ()
local r, s = crypto.parse_ecdsa_signature(sig, 32);
assert.is_string(r);
assert.is_string(s);
assert.equal(32, #r);
assert.equal(32, #s);
end);
it("fails to parse invalid signatures", function ()
local invalid_sigs = {
"";
"\000";
string.rep("\000", 64);
string.rep("\000", 72);
string.rep("\000", 256);
string.rep("\255", 72);
string.rep("\255", 3);
};
for _, invalid_sig in ipairs(invalid_sigs) do
local r, s = crypto.parse_ecdsa_signature(invalid_sig, 32);
assert.is_nil(r);
assert.is_nil(s);
end
end);
it("can be built", function ()
local r, s = crypto.parse_ecdsa_signature(sig, 32);
local rebuilt_sig = crypto.build_ecdsa_signature(r, s);
assert.equal(sig, rebuilt_sig);
end);
end);
describe("AES-GCM encryption", function ()
it("works", function ()
local message = "foo\0bar";
local key_128_bit = random.bytes(16);
local key_256_bit = random.bytes(32);
local test_cases = {
{ crypto.aes_128_gcm_encrypt, crypto.aes_128_gcm_decrypt, key = key_128_bit };
{ crypto.aes_256_gcm_encrypt, crypto.aes_256_gcm_decrypt, key = key_256_bit };
};
for _, params in pairs(test_cases) do
local iv = params.iv or random.bytes(12);
local encrypted = params[1](params.key, iv, message);
assert.not_equal(message, encrypted);
local decrypted = params[2](params.key, iv, encrypted);
assert.equal(message, decrypted);
end
end);
end);
describe("AES-CTR encryption", function ()
it("works", function ()
local message = "foo\0bar hello world";
local key_256_bit = random.bytes(32);
local test_cases = {
{ crypto.aes_256_ctr_decrypt, crypto.aes_256_ctr_decrypt, key = key_256_bit };
};
for _, params in pairs(test_cases) do
local iv = params.iv or random.bytes(16);
local encrypted = params[1](params.key, iv, message);
assert.not_equal(message, encrypted);
local decrypted = params[2](params.key, iv, encrypted);
assert.equal(message, decrypted);
end
end);
end);
end);
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