1
2
3
4
5 package cipher_test
6
7 import (
8 "bytes"
9 "crypto/aes"
10 "crypto/cipher"
11 "crypto/rand"
12 "encoding/hex"
13 "errors"
14 "io"
15 "reflect"
16 "testing"
17 )
18
19 var aesGCMTests = []struct {
20 key, nonce, plaintext, ad, result string
21 }{
22 {
23 "11754cd72aec309bf52f7687212e8957",
24 "3c819d9a9bed087615030b65",
25 "",
26 "",
27 "250327c674aaf477aef2675748cf6971",
28 },
29 {
30 "e2e001a36c60d2bf40d69ff5b2b1161ea218db263be16a4e",
31 "3c819d9a9bed087615030b65",
32 "",
33 "",
34 "c7b8da1fe2e3dccc4071ba92a0a57ba8",
35 },
36 {
37 "5394e890d37ba55ec9d5f327f15680f6a63ef5279c79331643ad0af6d2623525",
38 "3c819d9a9bed087615030b65",
39 "",
40 "",
41 "d9b260d4bc4630733ffb642f5ce45726",
42 },
43 {
44 "ca47248ac0b6f8372a97ac43508308ed",
45 "ffd2b598feabc9019262d2be",
46 "",
47 "",
48 "60d20404af527d248d893ae495707d1a",
49 },
50 {
51 "fbe3467cc254f81be8e78d765a2e6333",
52 "c6697351ff4aec29cdbaabf2",
53 "",
54 "67",
55 "3659cdc25288bf499ac736c03bfc1159",
56 },
57 {
58 "8a7f9d80d08ad0bd5a20fb689c88f9fc",
59 "88b7b27d800937fda4f47301",
60 "",
61 "50edd0503e0d7b8c91608eb5a1",
62 "ed6f65322a4740011f91d2aae22dd44e",
63 },
64 {
65 "051758e95ed4abb2cdc69bb454110e82",
66 "c99a66320db73158a35a255d",
67 "",
68 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339f",
69 "6ce77f1a5616c505b6aec09420234036",
70 },
71 {
72 "77be63708971c4e240d1cb79e8d77feb",
73 "e0e00f19fed7ba0136a797f3",
74 "",
75 "7a43ec1d9c0a5a78a0b16533a6213cab",
76 "209fcc8d3675ed938e9c7166709dd946",
77 },
78 {
79 "7680c5d3ca6154758e510f4d25b98820",
80 "f8f105f9c3df4965780321f8",
81 "",
82 "c94c410194c765e3dcc7964379758ed3",
83 "94dca8edfcf90bb74b153c8d48a17930",
84 },
85
86 {
87 "7fddb57453c241d03efbed3ac44e371c",
88 "ee283a3fc75575e33efd4887",
89 "d5de42b461646c255c87bd2962d3b9a2",
90 "",
91 "2ccda4a5415cb91e135c2a0f78c9b2fdb36d1df9b9d5e596f83e8b7f52971cb3",
92 },
93 {
94 "ab72c77b97cb5fe9a382d9fe81ffdbed",
95 "54cc7dc2c37ec006bcc6d1da",
96 "007c5e5b3e59df24a7c355584fc1518d",
97 "",
98 "0e1bde206a07a9c2c1b65300f8c649972b4401346697138c7a4891ee59867d0c",
99 },
100 {
101 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
102 "54cc7dc2c37ec006bcc6d1da",
103 "007c5e5b3e59df24a7c355584fc1518d",
104 "",
105 "7bd53594c28b6c6596feb240199cad4c9badb907fd65bde541b8df3bd444d3a8",
106 },
107 {
108 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
109 "54cc7dc2c37ec006bcc6d1da",
110 "007c5e5b3e59df24a7c355584fc1518d",
111 "",
112 "d50b9e252b70945d4240d351677eb10f937cdaef6f2822b6a3191654ba41b197",
113 },
114 {
115 "ab72c77b97cb5fe9a382d9fe81ffdbed",
116 "54cc7dc2c37ec006bcc6d1da",
117 "007c5e5b3e59df24a7c355584fc1518dabcdefab",
118 "",
119 "0e1bde206a07a9c2c1b65300f8c64997b73381a6ff6bc24c5146fbd73361f4fe",
120 },
121 {
122 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
123 "54cc7dc2c37ec006bcc6d1da",
124 "007c5e5b3e59df24a7c355584fc1518dabcdefab",
125 "",
126 "7bd53594c28b6c6596feb240199cad4c23b86a96d423cffa929e68541dc16b28",
127 },
128 {
129 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
130 "54cc7dc2c37ec006bcc6d1da",
131 "007c5e5b3e59df24a7c355584fc1518dabcdefab",
132 "",
133 "d50b9e252b70945d4240d351677eb10f27fd385388ad3b72b96a2d5dea1240ae",
134 },
135
136 {
137 "fe47fcce5fc32665d2ae399e4eec72ba",
138 "5adb9609dbaeb58cbd6e7275",
139 "7c0e88c88899a779228465074797cd4c2e1498d259b54390b85e3eef1c02df60e743f1b840382c4bccaf3bafb4ca8429bea063",
140 "88319d6e1d3ffa5f987199166c8a9b56c2aeba5a",
141 "98f4826f05a265e6dd2be82db241c0fbbbf9ffb1c173aa83964b7cf5393043736365253ddbc5db8778371495da76d269e5db3e291ef1982e4defedaa2249f898556b47",
142 },
143 {
144 "ec0c2ba17aa95cd6afffe949da9cc3a8",
145 "296bce5b50b7d66096d627ef",
146 "b85b3753535b825cbe5f632c0b843c741351f18aa484281aebec2f45bb9eea2d79d987b764b9611f6c0f8641843d5d58f3a242",
147 "f8d00f05d22bf68599bcdeb131292ad6e2df5d14",
148 "a7443d31c26bdf2a1c945e29ee4bd344a99cfaf3aa71f8b3f191f83c2adfc7a07162995506fde6309ffc19e716eddf1a828c5a890147971946b627c40016da1ecf3e77",
149 },
150 {
151 "2c1f21cf0f6fb3661943155c3e3d8492",
152 "23cb5ff362e22426984d1907",
153 "42f758836986954db44bf37c6ef5e4ac0adaf38f27252a1b82d02ea949c8a1a2dbc0d68b5615ba7c1220ff6510e259f06655d8",
154 "5d3624879d35e46849953e45a32a624d6a6c536ed9857c613b572b0333e701557a713e3f010ecdf9a6bd6c9e3e44b065208645aff4aabee611b391528514170084ccf587177f4488f33cfb5e979e42b6e1cfc0a60238982a7aec",
155 "81824f0e0d523db30d3da369fdc0d60894c7a0a20646dd015073ad2732bd989b14a222b6ad57af43e1895df9dca2a5344a62cc57a3ee28136e94c74838997ae9823f3a",
156 },
157 {
158 "d9f7d2411091f947b4d6f1e2d1f0fb2e",
159 "e1934f5db57cc983e6b180e7",
160 "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
161 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
162 "aaadbd5c92e9151ce3db7210b8714126b73e43436d242677afa50384f2149b831f1d573c7891c2a91fbc48db29967ec9542b2321b51ca862cb637cdd03b99a0f93b134",
163 },
164 {
165 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
166 "e1934f5db57cc983e6b180e7",
167 "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
168 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
169 "0736378955001d50773305975b3a534a4cd3614dd7300916301ae508cb7b45aa16e79435ca16b5557bcad5991bc52b971806863b15dc0b055748919b8ee91bc8477f68",
170 },
171 {
172 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
173 "e1934f5db57cc983e6b180e7",
174 "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
175 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
176 "fc1ae2b5dcd2c4176c3f538b4c3cc21197f79e608cc3730167936382e4b1e5a7b75ae1678bcebd876705477eb0e0fdbbcda92fb9a0dc58c8d8f84fb590e0422e6077ef",
177 },
178 {
179 "d9f7d2411091f947b4d6f1e2d1f0fb2e",
180 "e1934f5db57cc983e6b180e7",
181 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3aabbccddee",
182 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
183 "be86d00ce4e150190f646eae0f670ad26b3af66db45d2ee3fd71badd2fe763396bdbca498f3f779c70b80ed2695943e15139b406e5147b3855a1441dfb7bd64954b581e3db0ddf26b1c759e2276a4c18a8e4ad4b890f473e61c78e60074bd0633961e87e66d0a1be77c51ab6b9bb3318ccdd43794ffc18a03a83c1d368eeea590a13407c7ef48efc66e26047f3ab9deed0412ce89e",
184 },
185 {
186 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
187 "e1934f5db57cc983e6b180e7",
188 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3aabbccddee",
189 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
190 "131d5ad9230858559b8c1929ec2c18be90d7d4630e49018262ce5c511688bd10622109403db8006014ce93905b0a16bf1d1411acc9e14edf09518bd5967ff4bc202805d4c2810810a093e996a0f56c9a3e3e593c783f68528c1a282ff6f4925902bb2b3d4cdd04b873663bf5fd9dd53b5df462e0424d038f249b10a99c0523200f8c92c3e8a178a25ee8e23b71308c88ec2cfe047e",
191 },
192 {
193 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
194 "e1934f5db57cc983e6b180e7",
195 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3aabbccddee",
196 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
197 "e8318fe5aada811280804f35fb2a89e54bf32b4e55ba7b953547dadb39421d1dc39c7c127c6008b208010177f02fc093c8bbb8b3834d0e060d96dda96ba386c7c01224a4cac1edebffda4f9a64692bfbffb9f7c2999069fab84205224978a10d815d5ab8fa31e4e11630ba01c3b6cb99bef5772357ce86b83b4fb45ea7146402d560b6ad07de635b9366865e788a6bcdb132dcd079",
198 },
199 {
200 "fe9bb47deb3a61e423c2231841cfd1fb",
201 "4d328eb776f500a2f7fb47aa",
202 "f1cc3818e421876bb6b8bbd6c9",
203 "",
204 "b88c5c1977b35b517b0aeae96743fd4727fe5cdb4b5b42818dea7ef8c9",
205 },
206 {
207 "6703df3701a7f54911ca72e24dca046a",
208 "12823ab601c350ea4bc2488c",
209 "793cd125b0b84a043e3ac67717",
210 "",
211 "b2051c80014f42f08735a7b0cd38e6bcd29962e5f2c13626b85a877101",
212 },
213 {
214 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
215 "12823ab601c350ea4bc2488c",
216 "793cd125b0b84a043e3ac67717",
217 "",
218 "e888c2f438caedd4189d26c59f53439b8a7caec29e98c33ebf7e5712d6",
219 },
220 {
221 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
222 "12823ab601c350ea4bc2488c",
223 "793cd125b0b84a043e3ac67717",
224 "",
225 "e796c39074c7783a38193e3f8d46b355adacca7198d16d879fbfeac6e3",
226 },
227
228
229 {
230 "1672c3537afa82004c6b8a46f6f0d026",
231 "05",
232 "",
233 "",
234 "8e2ad721f9455f74d8b53d3141f27e8e",
235 },
236 {
237 "9a4fea86a621a91ab371e492457796c0",
238 "75",
239 "ca6131faf0ff210e4e693d6c31c109fc5b6f54224eb120f37de31dc59ec669b6",
240 "4f6e2585c161f05a9ae1f2f894e9f0ab52b45d0f",
241 "5698c0a384241d30004290aac56bb3ece6fe8eacc5c4be98954deb9c3ff6aebf5d50e1af100509e1fba2a5e8a0af9670",
242 },
243 {
244 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
245 "75",
246 "ca6131faf0ff210e4e693d6c31c109fc5b6f54224eb120f37de31dc59ec669b6",
247 "4f6e2585c161f05a9ae1f2f894e9f0ab52b45d0f",
248 "2709b357ec8334a074dbd5c4c352b216cfd1c8bd66343c5d43bfc6bd3b2b6cd0e3a82315d56ea5e4961c9ef3bc7e4042",
249 },
250 {
251 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
252 "75",
253 "ca6131faf0ff210e4e693d6c31c109fc5b6f54224eb120f37de31dc59ec669b6",
254 "4f6e2585c161f05a9ae1f2f894e9f0ab52b45d0f",
255 "d73bebe722c5e312fe910ba71d5a6a063a4297203f819103dfa885a8076d095545a999affde3dbac2b5be6be39195ed0",
256 },
257 {
258 "d0f1f4defa1e8c08b4b26d576392027c",
259 "42b4f01eb9f5a1ea5b1eb73b0fb0baed54f387ecaa0393c7d7dffc6af50146ecc021abf7eb9038d4303d91f8d741a11743166c0860208bcc02c6258fd9511a2fa626f96d60b72fcff773af4e88e7a923506e4916ecbd814651e9f445adef4ad6a6b6c7290cc13b956130eef5b837c939fcac0cbbcc9656cd75b13823ee5acdac",
260 "",
261 "",
262 "7ab49b57ddf5f62c427950111c5c4f0d",
263 },
264 {
265 "4a0c00a3d284dea9d4bf8b8dde86685e",
266 "f8cbe82588e784bcacbe092cd9089b51e01527297f635bf294b3aa787d91057ef23869789698ac960707857f163ecb242135a228ad93964f5dc4a4d7f88fd7b3b07dd0a5b37f9768fb05a523639f108c34c661498a56879e501a2321c8a4a94d7e1b89db255ac1f685e185263368e99735ebe62a7f2931b47282be8eb165e4d7",
267 "6d4bf87640a6a48a50d28797b7",
268 "8d8c7ffc55086d539b5a8f0d1232654c",
269 "0d803ec309482f35b8e6226f2b56303239298e06b281c2d51aaba3c125",
270 },
271 {
272 "0e18a844ac5bf38e4cd72d9b0942e506",
273 "0870d4b28a2954489a0abcd5",
274 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3",
275 "05eff700e9a13ae5ca0bcbd0484764bd1f231ea81c7b64c514735ac55e4b79633b706424119e09dcaad4acf21b10af3b33cde3504847155cbb6f2219ba9b7df50be11a1c7f23f829f8a41b13b5ca4ee8983238e0794d3d34bc5f4e77facb6c05ac86212baa1a55a2be70b5733b045cd33694b3afe2f0e49e4f321549fd824ea9",
276 "cace28f4976afd72e3c5128167eb788fbf6634dda0a2f53148d00f6fa557f5e9e8f736c12e450894af56cb67f7d99e1027258c8571bd91ee3b7360e0d508aa1f382411a16115f9c05251cc326d4016f62e0eb8151c048465b0c6c8ff12558d43310e18b2cb1889eec91557ce21ba05955cf4c1d4847aadfb1b0a83f3a3b82b7efa62a5f03c5d6eda381a85dd78dbc55c",
277 },
278 {
279 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
280 "0870d4b28a2954489a0abcd5",
281 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3",
282 "05eff700e9a13ae5ca0bcbd0484764bd1f231ea81c7b64c514735ac55e4b79633b706424119e09dcaad4acf21b10af3b33cde3504847155cbb6f2219ba9b7df50be11a1c7f23f829f8a41b13b5ca4ee8983238e0794d3d34bc5f4e77facb6c05ac86212baa1a55a2be70b5733b045cd33694b3afe2f0e49e4f321549fd824ea9",
283 "303157d398376a8d51e39eabdd397f45b65f81f09acbe51c726ae85867e1675cad178580bb31c7f37c1af3644bd36ac436e9459139a4903d95944f306e415da709134dccde9d2b2d7d196b6740c196d9d10caa45296cf577a6e15d7ddf3576c20c503617d6a9e6b6d2be09ae28410a1210700a463a5b3b8d391abe9dac217e76a6f78306b5ebe759a5986b7d6682db0b",
284 },
285 {
286 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
287 "0870d4b28a2954489a0abcd5",
288 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3",
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347 "a1be93012f05a1958440f74a5311f4a1",
348 "f7c27b51d5367161dc2ff1e9e3edc6f2",
349 "36f032f7e3dc3275ca22aedcdc68436b99a2227f8bb69d45ea5d8842cd08",
350 },
351 {
352 "66a3c722ccf9709525650973ecc100a9",
353 "1621d42d3a6d42a2d2bf9494",
354 "61fa9dbbed2190fbc2ffabf5d2ea4ff8",
355 "d7a9b6523b8827068a6354a6d166c6b9",
356 "fef3b20f40e08a49637cc82f4c89b8603fd5c0132acfab97b5fff651c4",
357 },
358 {
359 "562ae8aadb8d23e0f271a99a7d1bd4d1",
360 "f7a5e2399413b89b6ad31aff",
361 "bbdc3504d803682aa08a773cde5f231a",
362 "2b9680b886b3efb7c6354b38c63b5373",
363 "e2b7e5ed5ff27fc8664148f5a628a46dcbf2015184fffb82f2651c36",
364 },
365 {
366 "11754cd72aec309bf52f7687212e8957",
367 "",
368 "",
369 "",
370 "250327c674aaf477aef2675748cf6971",
371 },
372 }
373
374 func TestAESGCM(t *testing.T) {
375 for i, test := range aesGCMTests {
376 key, _ := hex.DecodeString(test.key)
377 aes, err := aes.NewCipher(key)
378 if err != nil {
379 t.Fatal(err)
380 }
381
382 nonce, _ := hex.DecodeString(test.nonce)
383 plaintext, _ := hex.DecodeString(test.plaintext)
384 ad, _ := hex.DecodeString(test.ad)
385 tagSize := (len(test.result) - len(test.plaintext)) / 2
386
387 var aesgcm cipher.AEAD
388 switch {
389
390 case tagSize != 16:
391 aesgcm, err = cipher.NewGCMWithTagSize(aes, tagSize)
392 if err != nil {
393 t.Fatal(err)
394 }
395
396
397 case len(nonce) == 0:
398 aesgcm, err = cipher.NewGCMWithNonceSize(aes, 0)
399 if err == nil {
400 t.Fatal("expected error for zero nonce size")
401 }
402 continue
403
404
405 case len(nonce) != 12:
406 aesgcm, err = cipher.NewGCMWithNonceSize(aes, len(nonce))
407 if err != nil {
408 t.Fatal(err)
409 }
410
411 default:
412 aesgcm, err = cipher.NewGCM(aes)
413 if err != nil {
414 t.Fatal(err)
415 }
416 }
417
418 ct := aesgcm.Seal(nil, nonce, plaintext, ad)
419 if ctHex := hex.EncodeToString(ct); ctHex != test.result {
420 t.Errorf("#%d: got %s, want %s", i, ctHex, test.result)
421 continue
422 }
423
424 plaintext2, err := aesgcm.Open(nil, nonce, ct, ad)
425 if err != nil {
426 t.Errorf("#%d: Open failed", i)
427 continue
428 }
429
430 if !bytes.Equal(plaintext, plaintext2) {
431 t.Errorf("#%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
432 continue
433 }
434
435 if len(ad) > 0 {
436 ad[0] ^= 0x80
437 if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
438 t.Errorf("#%d: Open was successful after altering additional data", i)
439 }
440 ad[0] ^= 0x80
441 }
442
443 nonce[0] ^= 0x80
444 if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
445 t.Errorf("#%d: Open was successful after altering nonce", i)
446 }
447 nonce[0] ^= 0x80
448
449 ct[0] ^= 0x80
450 if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
451 t.Errorf("#%d: Open was successful after altering ciphertext", i)
452 }
453 ct[0] ^= 0x80
454 }
455 }
456
457 func TestGCMInvalidTagSize(t *testing.T) {
458 key, _ := hex.DecodeString("ab72c77b97cb5fe9a382d9fe81ffdbed")
459
460 aes, _ := aes.NewCipher(key)
461
462 for _, tagSize := range []int{0, 1, aes.BlockSize() + 1} {
463 aesgcm, err := cipher.NewGCMWithTagSize(aes, tagSize)
464 if aesgcm != nil || err == nil {
465 t.Fatalf("NewGCMWithNonceAndTagSize was successful with an invalid %d-byte tag size", tagSize)
466 }
467 }
468 }
469
470 func TestTagFailureOverwrite(t *testing.T) {
471
472
473
474
475
476 key, _ := hex.DecodeString("ab72c77b97cb5fe9a382d9fe81ffdbed")
477 nonce, _ := hex.DecodeString("54cc7dc2c37ec006bcc6d1db")
478 ciphertext, _ := hex.DecodeString("0e1bde206a07a9c2c1b65300f8c649972b4401346697138c7a4891ee59867d0c")
479
480 aes, _ := aes.NewCipher(key)
481 aesgcm, _ := cipher.NewGCM(aes)
482
483 dst := make([]byte, len(ciphertext)-16)
484 for i := range dst {
485 dst[i] = 42
486 }
487
488 result, err := aesgcm.Open(dst[:0], nonce, ciphertext, nil)
489 if err == nil {
490 t.Fatal("Bad Open still resulted in nil error.")
491 }
492
493 if result != nil {
494 t.Fatal("Failed Open returned non-nil result.")
495 }
496
497 for i := range dst {
498 if dst[i] != 0 {
499 t.Fatal("Failed Open didn't zero dst buffer")
500 }
501 }
502 }
503
504 func TestGCMCounterWrap(t *testing.T) {
505
506 tests := []struct {
507 nonce, tag string
508 }{
509 {"0fa72e25", "37e1948cdfff09fbde0c40ad99fee4a7"},
510 {"afe05cc1", "438f3aa9fee5e54903b1927bca26bbdf"},
511 {"9ffecbef", "7b88ca424df9703e9e8611071ec7e16e"},
512 {"ffc3e5b3", "38d49c86e0abe853ac250e66da54c01a"},
513 {"cfdd729d", "e08402eaac36a1a402e09b1bd56500e8"},
514 {"010ae3d486", "5405bb490b1f95d01e2ba735687154bc"},
515 {"01b1107a9d", "939a585f342e01e17844627492d44dbf"},
516 }
517 key, err := aes.NewCipher(make([]byte, 16))
518 if err != nil {
519 t.Fatal(err)
520 }
521 plaintext := make([]byte, 16*17+1)
522 for i, test := range tests {
523 nonce, _ := hex.DecodeString(test.nonce)
524 want, _ := hex.DecodeString(test.tag)
525 aead, err := cipher.NewGCMWithNonceSize(key, len(nonce))
526 if err != nil {
527 t.Fatal(err)
528 }
529 got := aead.Seal(nil, nonce, plaintext, nil)
530 if !bytes.Equal(got[len(plaintext):], want) {
531 t.Errorf("test[%v]: got: %x, want: %x", i, got[len(plaintext):], want)
532 }
533 _, err = aead.Open(nil, nonce, got, nil)
534 if err != nil {
535 t.Errorf("test[%v]: authentication failed", i)
536 }
537 }
538 }
539
540 var _ cipher.Block = (*wrapper)(nil)
541
542 type wrapper struct {
543 block cipher.Block
544 }
545
546 func (w *wrapper) BlockSize() int { return w.block.BlockSize() }
547 func (w *wrapper) Encrypt(dst, src []byte) { w.block.Encrypt(dst, src) }
548 func (w *wrapper) Decrypt(dst, src []byte) { w.block.Decrypt(dst, src) }
549
550
551
552 func wrap(b cipher.Block) cipher.Block {
553 return &wrapper{b}
554 }
555
556 func TestGCMAsm(t *testing.T) {
557
558
559 newAESGCM := func(key []byte) (asm, generic cipher.AEAD, err error) {
560 block, err := aes.NewCipher(key[:])
561 if err != nil {
562 return nil, nil, err
563 }
564 asm, err = cipher.NewGCM(block)
565 if err != nil {
566 return nil, nil, err
567 }
568 generic, err = cipher.NewGCM(wrap(block))
569 if err != nil {
570 return nil, nil, err
571 }
572 return asm, generic, nil
573 }
574
575
576 var key [16]byte
577 asm, generic, err := newAESGCM(key[:])
578 if err != nil {
579 t.Fatal(err)
580 }
581 if reflect.TypeOf(asm) == reflect.TypeOf(generic) {
582 t.Skipf("no assembly implementation of GCM")
583 }
584
585
586 type pair struct{ align, length int }
587 lengths := []int{0, 156, 8192, 8193, 8208}
588 keySizes := []int{16, 24, 32}
589 alignments := []int{0, 1, 2, 3}
590 if testing.Short() {
591 keySizes = []int{16}
592 alignments = []int{1}
593 }
594 perms := make([]pair, 0)
595 for _, l := range lengths {
596 for _, a := range alignments {
597 if a != 0 && l == 0 {
598 continue
599 }
600 perms = append(perms, pair{align: a, length: l})
601 }
602 }
603
604
605 test := func(ks int, pt, ad []byte) error {
606 key := make([]byte, ks)
607 if _, err := io.ReadFull(rand.Reader, key); err != nil {
608 return err
609 }
610 asm, generic, err := newAESGCM(key)
611 if err != nil {
612 return err
613 }
614 if _, err := io.ReadFull(rand.Reader, pt); err != nil {
615 return err
616 }
617 if _, err := io.ReadFull(rand.Reader, ad); err != nil {
618 return err
619 }
620 nonce := make([]byte, 12)
621 if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
622 return err
623 }
624 want := generic.Seal(nil, nonce, pt, ad)
625 got := asm.Seal(nil, nonce, pt, ad)
626 if !bytes.Equal(want, got) {
627 return errors.New("incorrect Seal output")
628 }
629 got, err = asm.Open(nil, nonce, want, ad)
630 if err != nil {
631 return errors.New("authentication failed")
632 }
633 if !bytes.Equal(pt, got) {
634 return errors.New("incorrect Open output")
635 }
636 return nil
637 }
638 for _, a := range perms {
639 ad := make([]byte, a.align+a.length)
640 ad = ad[a.align:]
641 for _, p := range perms {
642 pt := make([]byte, p.align+p.length)
643 pt = pt[p.align:]
644 for _, ks := range keySizes {
645 if err := test(ks, pt, ad); err != nil {
646 t.Error(err)
647 t.Errorf(" key size: %v", ks)
648 t.Errorf(" plaintext alignment: %v", p.align)
649 t.Errorf(" plaintext length: %v", p.length)
650 t.Errorf(" additionalData alignment: %v", a.align)
651 t.Fatalf(" additionalData length: %v", a.length)
652 }
653 }
654 }
655 }
656 }
657
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