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7039d0ec11c3
spec/util_crypto_spec.lua

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spec/util_crypto_spec.lua @ 13129:7039d0ec11c3

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author Kim Alvefur <zash@zash.se>
date Wed, 07 Jun 2023 16:42:59 +0200
parent 12837:d3ae47d8a7a7
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899c057781cd spec: Move test crypto keys to a shared file for clarity and easy maintenance
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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
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7 describe("generate_ed25519_keypair", function ()
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8 local keypair = crypto.generate_ed25519_keypair();
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9 assert.is_not_nil(keypair);
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10 assert.equal("ED25519", keypair:get_type());
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11 end)
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12
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13 describe("import_private_pem", function ()
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14 it("can import ECDSA keys", function ()
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15 local ecdsa_key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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16 assert.equal("id-ecPublicKey", ecdsa_key:get_type());
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17 end);
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18
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19 it("can import EdDSA (Ed25519) keys", function ()
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20 local ed25519_key = crypto.import_private_pem(crypto.generate_ed25519_keypair():private_pem());
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21 assert.equal("ED25519", ed25519_key:get_type());
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22 end);
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23
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24 it("can import RSA keys", function ()
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25 -- TODO
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26 end);
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27
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28 it("rejects invalid keys", function ()
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29 assert.is_nil(crypto.import_private_pem(test_keys.eddsa_public_pem));
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30 assert.is_nil(crypto.import_private_pem(test_keys.ecdsa_public_pem));
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31 assert.is_nil(crypto.import_private_pem("foo"));
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32 assert.is_nil(crypto.import_private_pem(""));
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33 end);
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34 end);
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35
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36 describe("import_public_pem", function ()
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37 it("can import ECDSA public keys", function ()
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38 local ecdsa_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
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39 assert.equal("id-ecPublicKey", ecdsa_key:get_type());
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40 end);
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41
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42 it("can import EdDSA (Ed25519) public keys", function ()
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43 local ed25519_key = crypto.import_public_pem(test_keys.eddsa_public_pem);
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44 assert.equal("ED25519", ed25519_key:get_type());
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45 end);
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46
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47 it("can import RSA public keys", function ()
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48 -- TODO
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49 end);
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50 end);
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51
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52 describe("PEM export", function ()
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53 it("works", function ()
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54 local ecdsa_key = crypto.import_public_pem(test_keys.ecdsa_public_pem);
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55 assert.equal("id-ecPublicKey", ecdsa_key:get_type());
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56 assert.equal(test_keys.ecdsa_public_pem, ecdsa_key:public_pem());
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57
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58 assert.has_error(function ()
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59 -- Fails because private key is not available
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60 ecdsa_key:private_pem();
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61 end);
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62
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63 local ecdsa_private_key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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64 assert.equal(test_keys.ecdsa_private_pem, ecdsa_private_key:private_pem());
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65 end);
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66 end);
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67
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68 describe("sign/verify with", function ()
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69 local test_cases = {
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70 ed25519 = {
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71 crypto.ed25519_sign, crypto.ed25519_verify;
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72 key = crypto.import_private_pem(test_keys.eddsa_private_pem);
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73 sig_length = 64;
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74 };
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75 ecdsa = {
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76 crypto.ecdsa_sha256_sign, crypto.ecdsa_sha256_verify;
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77 key = crypto.import_private_pem(test_keys.ecdsa_private_pem);
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78 };
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79 };
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80 for test_name, test in pairs(test_cases) do
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81 local key = test.key;
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82 describe(test_name, function ()
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83 it("works", function ()
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84 local sign, verify = test[1], test[2];
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85 local sig = assert(sign(key, "Hello world"));
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86 assert.is_string(sig);
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87 if test.sig_length then
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88 assert.equal(test.sig_length, #sig);
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89 end
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90
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91 do
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92 local ok = verify(key, "Hello world", sig);
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93 assert.is_truthy(ok);
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94 end
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95 do -- Incorrect signature
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96 local ok = verify(key, "Hello world", sig:sub(1, -2)..string.char((sig:byte(-1)+1)%255));
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97 assert.is_falsy(ok);
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98 end
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99 do -- Incorrect message
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100 local ok = verify(key, "Hello earth", sig);
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101 assert.is_falsy(ok);
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102 end
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103 do -- Incorrect message (embedded NUL)
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104 local ok = verify(key, "Hello world\0foo", sig);
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105 assert.is_falsy(ok);
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106 end
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107 end);
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108 end);
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109 end
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110 end);
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111
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112 describe("ECDSA signatures", function ()
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113 local hex = require "util.hex";
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114 local sig = hex.decode((([[
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115 304402203e936e7b0bc62887e0e9d675afd08531a930384cfcf301
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116 f25d13053a2ebf141d02205a5a7c7b7ac5878d004cb79b17b39346
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117 6b0cd1043718ffc31c153b971d213a8e
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118 ]]):gsub("%s+", "")));
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119 it("can be parsed", function ()
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120 local r, s = crypto.parse_ecdsa_signature(sig, 32);
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121 assert.is_string(r);
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122 assert.is_string(s);
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123 assert.equal(32, #r);
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124 assert.equal(32, #s);
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125 end);
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126 it("fails to parse invalid signatures", function ()
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127 local invalid_sigs = {
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128 "";
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129 "\000";
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130 string.rep("\000", 64);
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131 string.rep("\000", 72);
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132 string.rep("\000", 256);
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133 string.rep("\255", 72);
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134 string.rep("\255", 3);
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135 };
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136 for _, invalid_sig in ipairs(invalid_sigs) do
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137 local r, s = crypto.parse_ecdsa_signature(invalid_sig, 32);
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138 assert.is_nil(r);
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139 assert.is_nil(s);
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140 end
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141 end);
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142 it("can be built", function ()
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143 local r, s = crypto.parse_ecdsa_signature(sig, 32);
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144 local rebuilt_sig = crypto.build_ecdsa_signature(r, s);
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145 assert.equal(sig, rebuilt_sig);
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146 end);
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147 end);
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148
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149 describe("AES-GCM encryption", function ()
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150 it("works", function ()
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151 local message = "foo\0bar";
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152 local key_128_bit = random.bytes(16);
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153 local key_256_bit = random.bytes(32);
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154 local test_cases = {
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155 { crypto.aes_128_gcm_encrypt, crypto.aes_128_gcm_decrypt, key = key_128_bit };
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156 { crypto.aes_256_gcm_encrypt, crypto.aes_256_gcm_decrypt, key = key_256_bit };
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157 };
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158 for _, params in pairs(test_cases) do
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159 local iv = params.iv or random.bytes(12);
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160 local encrypted = params[1](params.key, iv, message);
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161 assert.not_equal(message, encrypted);
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162 local decrypted = params[2](params.key, iv, encrypted);
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163 assert.equal(message, decrypted);
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164 end
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165 end);
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166 end);
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167
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168 describe("AES-CTR encryption", function ()
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169 it("works", function ()
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170 local message = "foo\0bar hello world";
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171 local key_256_bit = random.bytes(32);
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172 local test_cases = {
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173 { crypto.aes_256_ctr_decrypt, crypto.aes_256_ctr_decrypt, key = key_256_bit };
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174 };
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175 for _, params in pairs(test_cases) do
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176 local iv = params.iv or random.bytes(16);
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177 local encrypted = params[1](params.key, iv, message);
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178 assert.not_equal(message, encrypted);
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179 local decrypted = params[2](params.key, iv, encrypted);
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180 assert.equal(message, decrypted);
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181 end
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182 end);
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183 end);
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184 end);