prosody
850e4ade7a01
spec/util_crypto_spec.lua

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spec/util_crypto_spec.lua @ 13553:850e4ade7a01

net.server_epoll: Make running out of buffer space a fatal error Prevent Bad Things from happening when the buffer gets full. This of course opens up the possibility of intentionally killing connections by sending much stuff, which need to be mitigated with rate limits elsewhere.
author Kim Alvefur <zash@zash.se>
date Sat, 09 Nov 2024 15:42:31 +0100
parent 13537:fb970df95374
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rev   line source
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1 local test_keys = require "spec.inputs.test_keys";
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2
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3 describe("util.crypto", function ()
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4 local crypto = require "util.crypto";
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5 local random = require "util.random";
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6 local encodings = require "util.encodings";
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7
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8 describe("generate_ed25519_keypair", function ()
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9 local keypair = crypto.generate_ed25519_keypair();
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10 assert.is_not_nil(keypair);
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11 assert.equal("ED25519", keypair:get_type());
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12 end)
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13
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14 describe("generate_p256_keypair", function ()
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15 local keypair = crypto.generate_p256_keypair();
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16 assert.is_not_nil(keypair);
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17 assert.equal("id-ecPublicKey", keypair:get_type());
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18 end)
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19
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20 describe("export/import raw", function ()
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21 local keypair = crypto.generate_p256_keypair();
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22 assert.is_not_nil(keypair);
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23 local raw = keypair:public_raw()
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24 local imported = crypto.import_public_ec_raw(raw, "P-256")
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25 assert.equal(keypair:public_pem(), imported:public_pem());
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26 end)
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27
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28 describe("derive", function ()
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29 local key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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30 local peer_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
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31 assert.equal("n1v4KeKmOVwjC67fiKtjJnqcEaasbpZa2fLPNHW51co=", encodings.base64.encode(key:derive(peer_key)))
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32 end)
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33
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34 describe("import_private_pem", function ()
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35 it("can import ECDSA keys", function ()
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36 local ecdsa_key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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37 assert.equal("id-ecPublicKey", ecdsa_key:get_type());
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38 end);
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39
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40 it("can import EdDSA (Ed25519) keys", function ()
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41 local ed25519_key = crypto.import_private_pem(crypto.generate_ed25519_keypair():private_pem());
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42 assert.equal("ED25519", ed25519_key:get_type());
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43 end);
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44
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45 it("can import RSA keys", function ()
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46 -- TODO
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47 end);
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48
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49 it("rejects invalid keys", function ()
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50 assert.is_nil(crypto.import_private_pem(test_keys.eddsa_public_pem));
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51 assert.is_nil(crypto.import_private_pem(test_keys.ecdsa_public_pem));
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52 assert.is_nil(crypto.import_private_pem("foo"));
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53 assert.is_nil(crypto.import_private_pem(""));
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54 end);
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55 end);
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56
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57 describe("import_public_pem", function ()
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58 it("can import ECDSA public keys", function ()
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59 local ecdsa_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
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60 assert.equal("id-ecPublicKey", ecdsa_key:get_type());
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61 end);
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62
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63 it("can import EdDSA (Ed25519) public keys", function ()
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64 local ed25519_key = crypto.import_public_pem(test_keys.eddsa_public_pem);
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65 assert.equal("ED25519", ed25519_key:get_type());
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66 end);
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67
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68 it("can import RSA public keys", function ()
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69 -- TODO
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70 end);
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71 end);
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72
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73 describe("PEM export", function ()
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74 it("works", function ()
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75 local ecdsa_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
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76 assert.equal("id-ecPublicKey", ecdsa_key:get_type());
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77 assert.equal(test_keys.ecdsa_public_pem, ecdsa_key:public_pem());
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78
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79 assert.has_error(function ()
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80 -- Fails because private key is not available
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81 ecdsa_key:private_pem();
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82 end);
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83
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84 local ecdsa_private_key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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85 assert.equal(test_keys.ecdsa_private_pem, ecdsa_private_key:private_pem());
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86 end);
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87 end);
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88
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89 describe("sign/verify with", function ()
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90 local test_cases = {
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91 ed25519 = {
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92 crypto.ed25519_sign, crypto.ed25519_verify;
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93 key = crypto.import_private_pem(test_keys.eddsa_private_pem);
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94 sig_length = 64;
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95 };
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96 ecdsa = {
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97 crypto.ecdsa_sha256_sign, crypto.ecdsa_sha256_verify;
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98 key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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99 };
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100 };
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101 for test_name, test in pairs(test_cases) do
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102 local key = test.key;
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103 describe(test_name, function ()
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104 it("works", function ()
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105 local sign, verify = test[1], test[2];
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106 local sig = assert(sign(key, "Hello world"));
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107 assert.is_string(sig);
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108 if test.sig_length then
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109 assert.equal(test.sig_length, #sig);
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110 end
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111
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112 do
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113 local ok = verify(key, "Hello world", sig);
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114 assert.is_truthy(ok);
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115 end
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116 do -- Incorrect signature
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117 local ok = verify(key, "Hello world", sig:sub(1, -2)..string.char((sig:byte(-1)+1)%255));
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118 assert.is_falsy(ok);
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119 end
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120 do -- Incorrect message
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121 local ok = verify(key, "Hello earth", sig);
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122 assert.is_falsy(ok);
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123 end
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124 do -- Incorrect message (embedded NUL)
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125 local ok = verify(key, "Hello world\0foo", sig);
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126 assert.is_falsy(ok);
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127 end
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128 end);
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129 end);
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130 end
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131 end);
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132
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133 describe("ECDSA signatures", function ()
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134 local hex = require "util.hex";
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135 local sig = hex.decode((([[
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136 304402203e936e7b0bc62887e0e9d675afd08531a930384cfcf301
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137 f25d13053a2ebf141d02205a5a7c7b7ac5878d004cb79b17b39346
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138 6b0cd1043718ffc31c153b971d213a8e
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139 ]]):gsub("%s+", "")));
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140 it("can be parsed", function ()
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141 local r, s = crypto.parse_ecdsa_signature(sig, 32);
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142 assert.is_string(r);
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143 assert.is_string(s);
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144 assert.equal(32, #r);
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145 assert.equal(32, #s);
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146 end);
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147 it("fails to parse invalid signatures", function ()
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148 local invalid_sigs = {
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149 "";
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150 "\000";
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151 string.rep("\000", 64);
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152 string.rep("\000", 72);
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153 string.rep("\000", 256);
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154 string.rep("\255", 72);
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155 string.rep("\255", 3);
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156 };
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157 for _, invalid_sig in ipairs(invalid_sigs) do
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158 local r, s = crypto.parse_ecdsa_signature(invalid_sig, 32);
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159 assert.is_nil(r);
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160 assert.is_nil(s);
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161 end
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162 end);
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163 it("can be built", function ()
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164 local r, s = crypto.parse_ecdsa_signature(sig, 32);
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165 local rebuilt_sig = crypto.build_ecdsa_signature(r, s);
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166 assert.equal(sig, rebuilt_sig);
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167 end);
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168 end);
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169
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170 describe("AES-GCM encryption", function ()
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171 it("works", function ()
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172 local message = "foo\0bar";
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173 local key_128_bit = random.bytes(16);
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174 local key_256_bit = random.bytes(32);
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175 local test_cases = {
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176 { crypto.aes_128_gcm_encrypt, crypto.aes_128_gcm_decrypt, key = key_128_bit };
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177 { crypto.aes_256_gcm_encrypt, crypto.aes_256_gcm_decrypt, key = key_256_bit };
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178 };
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179 for _, params in pairs(test_cases) do
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180 local iv = params.iv or random.bytes(12);
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181 local encrypted = params[1](params.key, iv, message);
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182 assert.not_equal(message, encrypted);
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183 local decrypted = params[2](params.key, iv, encrypted);
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184 assert.equal(message, decrypted);
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185 end
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186 end);
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187 end);
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188
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189 describe("AES-CTR encryption", function ()
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190 it("works", function ()
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191 local message = "foo\0bar hello world";
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192 local key_256_bit = random.bytes(32);
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193 local test_cases = {
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194 { crypto.aes_256_ctr_decrypt, crypto.aes_256_ctr_decrypt, key = key_256_bit };
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195 };
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196 for _, params in pairs(test_cases) do
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197 local iv = params.iv or random.bytes(16);
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198 local encrypted = params[1](params.key, iv, message);
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199 assert.not_equal(message, encrypted);
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200 local decrypted = params[2](params.key, iv, encrypted);
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201 assert.equal(message, decrypted);
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202 end
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203 end);
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204 end);
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205 end);