1
2
3
4
5 package cipher_test
6
7 import (
8 "bytes"
9 "crypto/aes"
10 "crypto/cipher"
11 "crypto/internal/cryptotest"
12 "crypto/rand"
13 "encoding/hex"
14 "errors"
15 "fmt"
16 "io"
17 "reflect"
18 "testing"
19 )
20
21 var aesGCMTests = []struct {
22 key, nonce, plaintext, ad, result string
23 }{
24 {
25 "11754cd72aec309bf52f7687212e8957",
26 "3c819d9a9bed087615030b65",
27 "",
28 "",
29 "250327c674aaf477aef2675748cf6971",
30 },
31 {
32 "e2e001a36c60d2bf40d69ff5b2b1161ea218db263be16a4e",
33 "3c819d9a9bed087615030b65",
34 "",
35 "",
36 "c7b8da1fe2e3dccc4071ba92a0a57ba8",
37 },
38 {
39 "5394e890d37ba55ec9d5f327f15680f6a63ef5279c79331643ad0af6d2623525",
40 "3c819d9a9bed087615030b65",
41 "",
42 "",
43 "d9b260d4bc4630733ffb642f5ce45726",
44 },
45 {
46 "ca47248ac0b6f8372a97ac43508308ed",
47 "ffd2b598feabc9019262d2be",
48 "",
49 "",
50 "60d20404af527d248d893ae495707d1a",
51 },
52 {
53 "fbe3467cc254f81be8e78d765a2e6333",
54 "c6697351ff4aec29cdbaabf2",
55 "",
56 "67",
57 "3659cdc25288bf499ac736c03bfc1159",
58 },
59 {
60 "8a7f9d80d08ad0bd5a20fb689c88f9fc",
61 "88b7b27d800937fda4f47301",
62 "",
63 "50edd0503e0d7b8c91608eb5a1",
64 "ed6f65322a4740011f91d2aae22dd44e",
65 },
66 {
67 "051758e95ed4abb2cdc69bb454110e82",
68 "c99a66320db73158a35a255d",
69 "",
70 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339f",
71 "6ce77f1a5616c505b6aec09420234036",
72 },
73 {
74 "77be63708971c4e240d1cb79e8d77feb",
75 "e0e00f19fed7ba0136a797f3",
76 "",
77 "7a43ec1d9c0a5a78a0b16533a6213cab",
78 "209fcc8d3675ed938e9c7166709dd946",
79 },
80 {
81 "7680c5d3ca6154758e510f4d25b98820",
82 "f8f105f9c3df4965780321f8",
83 "",
84 "c94c410194c765e3dcc7964379758ed3",
85 "94dca8edfcf90bb74b153c8d48a17930",
86 },
87
88 {
89 "7fddb57453c241d03efbed3ac44e371c",
90 "ee283a3fc75575e33efd4887",
91 "d5de42b461646c255c87bd2962d3b9a2",
92 "",
93 "2ccda4a5415cb91e135c2a0f78c9b2fdb36d1df9b9d5e596f83e8b7f52971cb3",
94 },
95 {
96 "ab72c77b97cb5fe9a382d9fe81ffdbed",
97 "54cc7dc2c37ec006bcc6d1da",
98 "007c5e5b3e59df24a7c355584fc1518d",
99 "",
100 "0e1bde206a07a9c2c1b65300f8c649972b4401346697138c7a4891ee59867d0c",
101 },
102 {
103 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
104 "54cc7dc2c37ec006bcc6d1da",
105 "007c5e5b3e59df24a7c355584fc1518d",
106 "",
107 "7bd53594c28b6c6596feb240199cad4c9badb907fd65bde541b8df3bd444d3a8",
108 },
109 {
110 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
111 "54cc7dc2c37ec006bcc6d1da",
112 "007c5e5b3e59df24a7c355584fc1518d",
113 "",
114 "d50b9e252b70945d4240d351677eb10f937cdaef6f2822b6a3191654ba41b197",
115 },
116 {
117 "ab72c77b97cb5fe9a382d9fe81ffdbed",
118 "54cc7dc2c37ec006bcc6d1da",
119 "007c5e5b3e59df24a7c355584fc1518dabcdefab",
120 "",
121 "0e1bde206a07a9c2c1b65300f8c64997b73381a6ff6bc24c5146fbd73361f4fe",
122 },
123 {
124 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
125 "54cc7dc2c37ec006bcc6d1da",
126 "007c5e5b3e59df24a7c355584fc1518dabcdefab",
127 "",
128 "7bd53594c28b6c6596feb240199cad4c23b86a96d423cffa929e68541dc16b28",
129 },
130 {
131 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
132 "54cc7dc2c37ec006bcc6d1da",
133 "007c5e5b3e59df24a7c355584fc1518dabcdefab",
134 "",
135 "d50b9e252b70945d4240d351677eb10f27fd385388ad3b72b96a2d5dea1240ae",
136 },
137
138 {
139 "fe47fcce5fc32665d2ae399e4eec72ba",
140 "5adb9609dbaeb58cbd6e7275",
141 "7c0e88c88899a779228465074797cd4c2e1498d259b54390b85e3eef1c02df60e743f1b840382c4bccaf3bafb4ca8429bea063",
142 "88319d6e1d3ffa5f987199166c8a9b56c2aeba5a",
143 "98f4826f05a265e6dd2be82db241c0fbbbf9ffb1c173aa83964b7cf5393043736365253ddbc5db8778371495da76d269e5db3e291ef1982e4defedaa2249f898556b47",
144 },
145 {
146 "ec0c2ba17aa95cd6afffe949da9cc3a8",
147 "296bce5b50b7d66096d627ef",
148 "b85b3753535b825cbe5f632c0b843c741351f18aa484281aebec2f45bb9eea2d79d987b764b9611f6c0f8641843d5d58f3a242",
149 "f8d00f05d22bf68599bcdeb131292ad6e2df5d14",
150 "a7443d31c26bdf2a1c945e29ee4bd344a99cfaf3aa71f8b3f191f83c2adfc7a07162995506fde6309ffc19e716eddf1a828c5a890147971946b627c40016da1ecf3e77",
151 },
152 {
153 "2c1f21cf0f6fb3661943155c3e3d8492",
154 "23cb5ff362e22426984d1907",
155 "42f758836986954db44bf37c6ef5e4ac0adaf38f27252a1b82d02ea949c8a1a2dbc0d68b5615ba7c1220ff6510e259f06655d8",
156 "5d3624879d35e46849953e45a32a624d6a6c536ed9857c613b572b0333e701557a713e3f010ecdf9a6bd6c9e3e44b065208645aff4aabee611b391528514170084ccf587177f4488f33cfb5e979e42b6e1cfc0a60238982a7aec",
157 "81824f0e0d523db30d3da369fdc0d60894c7a0a20646dd015073ad2732bd989b14a222b6ad57af43e1895df9dca2a5344a62cc57a3ee28136e94c74838997ae9823f3a",
158 },
159 {
160 "d9f7d2411091f947b4d6f1e2d1f0fb2e",
161 "e1934f5db57cc983e6b180e7",
162 "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
163 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
164 "aaadbd5c92e9151ce3db7210b8714126b73e43436d242677afa50384f2149b831f1d573c7891c2a91fbc48db29967ec9542b2321b51ca862cb637cdd03b99a0f93b134",
165 },
166 {
167 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
168 "e1934f5db57cc983e6b180e7",
169 "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
170 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
171 "0736378955001d50773305975b3a534a4cd3614dd7300916301ae508cb7b45aa16e79435ca16b5557bcad5991bc52b971806863b15dc0b055748919b8ee91bc8477f68",
172 },
173 {
174 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
175 "e1934f5db57cc983e6b180e7",
176 "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
177 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
178 "fc1ae2b5dcd2c4176c3f538b4c3cc21197f79e608cc3730167936382e4b1e5a7b75ae1678bcebd876705477eb0e0fdbbcda92fb9a0dc58c8d8f84fb590e0422e6077ef",
179 },
180 {
181 "d9f7d2411091f947b4d6f1e2d1f0fb2e",
182 "e1934f5db57cc983e6b180e7",
183 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3aabbccddee",
184 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
185 "be86d00ce4e150190f646eae0f670ad26b3af66db45d2ee3fd71badd2fe763396bdbca498f3f779c70b80ed2695943e15139b406e5147b3855a1441dfb7bd64954b581e3db0ddf26b1c759e2276a4c18a8e4ad4b890f473e61c78e60074bd0633961e87e66d0a1be77c51ab6b9bb3318ccdd43794ffc18a03a83c1d368eeea590a13407c7ef48efc66e26047f3ab9deed0412ce89e",
186 },
187 {
188 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
189 "e1934f5db57cc983e6b180e7",
190 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3aabbccddee",
191 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
192 "131d5ad9230858559b8c1929ec2c18be90d7d4630e49018262ce5c511688bd10622109403db8006014ce93905b0a16bf1d1411acc9e14edf09518bd5967ff4bc202805d4c2810810a093e996a0f56c9a3e3e593c783f68528c1a282ff6f4925902bb2b3d4cdd04b873663bf5fd9dd53b5df462e0424d038f249b10a99c0523200f8c92c3e8a178a25ee8e23b71308c88ec2cfe047e",
193 },
194 {
195 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
196 "e1934f5db57cc983e6b180e7",
197 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3aabbccddee",
198 "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
199 "e8318fe5aada811280804f35fb2a89e54bf32b4e55ba7b953547dadb39421d1dc39c7c127c6008b208010177f02fc093c8bbb8b3834d0e060d96dda96ba386c7c01224a4cac1edebffda4f9a64692bfbffb9f7c2999069fab84205224978a10d815d5ab8fa31e4e11630ba01c3b6cb99bef5772357ce86b83b4fb45ea7146402d560b6ad07de635b9366865e788a6bcdb132dcd079",
200 },
201 {
202 "fe9bb47deb3a61e423c2231841cfd1fb",
203 "4d328eb776f500a2f7fb47aa",
204 "f1cc3818e421876bb6b8bbd6c9",
205 "",
206 "b88c5c1977b35b517b0aeae96743fd4727fe5cdb4b5b42818dea7ef8c9",
207 },
208 {
209 "6703df3701a7f54911ca72e24dca046a",
210 "12823ab601c350ea4bc2488c",
211 "793cd125b0b84a043e3ac67717",
212 "",
213 "b2051c80014f42f08735a7b0cd38e6bcd29962e5f2c13626b85a877101",
214 },
215 {
216 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
217 "12823ab601c350ea4bc2488c",
218 "793cd125b0b84a043e3ac67717",
219 "",
220 "e888c2f438caedd4189d26c59f53439b8a7caec29e98c33ebf7e5712d6",
221 },
222 {
223 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
224 "12823ab601c350ea4bc2488c",
225 "793cd125b0b84a043e3ac67717",
226 "",
227 "e796c39074c7783a38193e3f8d46b355adacca7198d16d879fbfeac6e3",
228 },
229
230
231 {
232 "1672c3537afa82004c6b8a46f6f0d026",
233 "05",
234 "",
235 "",
236 "8e2ad721f9455f74d8b53d3141f27e8e",
237 },
238 {
239 "9a4fea86a621a91ab371e492457796c0",
240 "75",
241 "ca6131faf0ff210e4e693d6c31c109fc5b6f54224eb120f37de31dc59ec669b6",
242 "4f6e2585c161f05a9ae1f2f894e9f0ab52b45d0f",
243 "5698c0a384241d30004290aac56bb3ece6fe8eacc5c4be98954deb9c3ff6aebf5d50e1af100509e1fba2a5e8a0af9670",
244 },
245 {
246 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
247 "75",
248 "ca6131faf0ff210e4e693d6c31c109fc5b6f54224eb120f37de31dc59ec669b6",
249 "4f6e2585c161f05a9ae1f2f894e9f0ab52b45d0f",
250 "2709b357ec8334a074dbd5c4c352b216cfd1c8bd66343c5d43bfc6bd3b2b6cd0e3a82315d56ea5e4961c9ef3bc7e4042",
251 },
252 {
253 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
254 "75",
255 "ca6131faf0ff210e4e693d6c31c109fc5b6f54224eb120f37de31dc59ec669b6",
256 "4f6e2585c161f05a9ae1f2f894e9f0ab52b45d0f",
257 "d73bebe722c5e312fe910ba71d5a6a063a4297203f819103dfa885a8076d095545a999affde3dbac2b5be6be39195ed0",
258 },
259 {
260 "d0f1f4defa1e8c08b4b26d576392027c",
261 "42b4f01eb9f5a1ea5b1eb73b0fb0baed54f387ecaa0393c7d7dffc6af50146ecc021abf7eb9038d4303d91f8d741a11743166c0860208bcc02c6258fd9511a2fa626f96d60b72fcff773af4e88e7a923506e4916ecbd814651e9f445adef4ad6a6b6c7290cc13b956130eef5b837c939fcac0cbbcc9656cd75b13823ee5acdac",
262 "",
263 "",
264 "7ab49b57ddf5f62c427950111c5c4f0d",
265 },
266 {
267 "4a0c00a3d284dea9d4bf8b8dde86685e",
268 "f8cbe82588e784bcacbe092cd9089b51e01527297f635bf294b3aa787d91057ef23869789698ac960707857f163ecb242135a228ad93964f5dc4a4d7f88fd7b3b07dd0a5b37f9768fb05a523639f108c34c661498a56879e501a2321c8a4a94d7e1b89db255ac1f685e185263368e99735ebe62a7f2931b47282be8eb165e4d7",
269 "6d4bf87640a6a48a50d28797b7",
270 "8d8c7ffc55086d539b5a8f0d1232654c",
271 "0d803ec309482f35b8e6226f2b56303239298e06b281c2d51aaba3c125",
272 },
273 {
274 "0e18a844ac5bf38e4cd72d9b0942e506",
275 "0870d4b28a2954489a0abcd5",
276 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3",
277 "05eff700e9a13ae5ca0bcbd0484764bd1f231ea81c7b64c514735ac55e4b79633b706424119e09dcaad4acf21b10af3b33cde3504847155cbb6f2219ba9b7df50be11a1c7f23f829f8a41b13b5ca4ee8983238e0794d3d34bc5f4e77facb6c05ac86212baa1a55a2be70b5733b045cd33694b3afe2f0e49e4f321549fd824ea9",
278 "cace28f4976afd72e3c5128167eb788fbf6634dda0a2f53148d00f6fa557f5e9e8f736c12e450894af56cb67f7d99e1027258c8571bd91ee3b7360e0d508aa1f382411a16115f9c05251cc326d4016f62e0eb8151c048465b0c6c8ff12558d43310e18b2cb1889eec91557ce21ba05955cf4c1d4847aadfb1b0a83f3a3b82b7efa62a5f03c5d6eda381a85dd78dbc55c",
279 },
280 {
281 "feffe9928665731c6d6a8f9467308308feffe9928665731c",
282 "0870d4b28a2954489a0abcd5",
283 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3",
284 "05eff700e9a13ae5ca0bcbd0484764bd1f231ea81c7b64c514735ac55e4b79633b706424119e09dcaad4acf21b10af3b33cde3504847155cbb6f2219ba9b7df50be11a1c7f23f829f8a41b13b5ca4ee8983238e0794d3d34bc5f4e77facb6c05ac86212baa1a55a2be70b5733b045cd33694b3afe2f0e49e4f321549fd824ea9",
285 "303157d398376a8d51e39eabdd397f45b65f81f09acbe51c726ae85867e1675cad178580bb31c7f37c1af3644bd36ac436e9459139a4903d95944f306e415da709134dccde9d2b2d7d196b6740c196d9d10caa45296cf577a6e15d7ddf3576c20c503617d6a9e6b6d2be09ae28410a1210700a463a5b3b8d391abe9dac217e76a6f78306b5ebe759a5986b7d6682db0b",
286 },
287 {
288 "feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308",
289 "0870d4b28a2954489a0abcd5",
290 "67c6697351ff4aec29cdbaabf2fbe3467cc254f81be8e78d765a2e63339fc99a66320db73158a35a255d051758e95ed4abb2cdc69bb454110e827441213ddc8770e93ea141e1fc673e017e97eadc6b968f385c2aecb03bfb32af3c54ec18db5c021afe43fbfaaa3afb29d1e6053c7c9475d8be6189f95cbba8990f95b1ebf1b3",
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349 "a1be93012f05a1958440f74a5311f4a1",
350 "f7c27b51d5367161dc2ff1e9e3edc6f2",
351 "36f032f7e3dc3275ca22aedcdc68436b99a2227f8bb69d45ea5d8842cd08",
352 },
353 {
354 "66a3c722ccf9709525650973ecc100a9",
355 "1621d42d3a6d42a2d2bf9494",
356 "61fa9dbbed2190fbc2ffabf5d2ea4ff8",
357 "d7a9b6523b8827068a6354a6d166c6b9",
358 "fef3b20f40e08a49637cc82f4c89b8603fd5c0132acfab97b5fff651c4",
359 },
360 {
361 "562ae8aadb8d23e0f271a99a7d1bd4d1",
362 "f7a5e2399413b89b6ad31aff",
363 "bbdc3504d803682aa08a773cde5f231a",
364 "2b9680b886b3efb7c6354b38c63b5373",
365 "e2b7e5ed5ff27fc8664148f5a628a46dcbf2015184fffb82f2651c36",
366 },
367 {
368 "11754cd72aec309bf52f7687212e8957",
369 "",
370 "",
371 "",
372 "250327c674aaf477aef2675748cf6971",
373 },
374 }
375
376 func TestAESGCM(t *testing.T) {
377 for i, test := range aesGCMTests {
378 key, _ := hex.DecodeString(test.key)
379 aes, err := aes.NewCipher(key)
380 if err != nil {
381 t.Fatal(err)
382 }
383
384 nonce, _ := hex.DecodeString(test.nonce)
385 plaintext, _ := hex.DecodeString(test.plaintext)
386 ad, _ := hex.DecodeString(test.ad)
387 tagSize := (len(test.result) - len(test.plaintext)) / 2
388
389 var aesgcm cipher.AEAD
390 switch {
391
392 case tagSize != 16:
393 aesgcm, err = cipher.NewGCMWithTagSize(aes, tagSize)
394 if err != nil {
395 t.Fatal(err)
396 }
397
398
399 case len(nonce) == 0:
400 aesgcm, err = cipher.NewGCMWithNonceSize(aes, 0)
401 if err == nil {
402 t.Fatal("expected error for zero nonce size")
403 }
404 continue
405
406
407 case len(nonce) != 12:
408 aesgcm, err = cipher.NewGCMWithNonceSize(aes, len(nonce))
409 if err != nil {
410 t.Fatal(err)
411 }
412
413 default:
414 aesgcm, err = cipher.NewGCM(aes)
415 if err != nil {
416 t.Fatal(err)
417 }
418 }
419
420 ct := aesgcm.Seal(nil, nonce, plaintext, ad)
421 if ctHex := hex.EncodeToString(ct); ctHex != test.result {
422 t.Errorf("#%d: got %s, want %s", i, ctHex, test.result)
423 continue
424 }
425
426 plaintext2, err := aesgcm.Open(nil, nonce, ct, ad)
427 if err != nil {
428 t.Errorf("#%d: Open failed", i)
429 continue
430 }
431
432 if !bytes.Equal(plaintext, plaintext2) {
433 t.Errorf("#%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
434 continue
435 }
436
437 if len(ad) > 0 {
438 ad[0] ^= 0x80
439 if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
440 t.Errorf("#%d: Open was successful after altering additional data", i)
441 }
442 ad[0] ^= 0x80
443 }
444
445 nonce[0] ^= 0x80
446 if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
447 t.Errorf("#%d: Open was successful after altering nonce", i)
448 }
449 nonce[0] ^= 0x80
450
451 ct[0] ^= 0x80
452 if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
453 t.Errorf("#%d: Open was successful after altering ciphertext", i)
454 }
455 ct[0] ^= 0x80
456 }
457 }
458
459 func TestGCMInvalidTagSize(t *testing.T) {
460 key, _ := hex.DecodeString("ab72c77b97cb5fe9a382d9fe81ffdbed")
461
462 aes, _ := aes.NewCipher(key)
463
464 for _, tagSize := range []int{0, 1, aes.BlockSize() + 1} {
465 aesgcm, err := cipher.NewGCMWithTagSize(aes, tagSize)
466 if aesgcm != nil || err == nil {
467 t.Fatalf("NewGCMWithNonceAndTagSize was successful with an invalid %d-byte tag size", tagSize)
468 }
469 }
470 }
471
472 func TestTagFailureOverwrite(t *testing.T) {
473
474
475
476
477
478 key, _ := hex.DecodeString("ab72c77b97cb5fe9a382d9fe81ffdbed")
479 nonce, _ := hex.DecodeString("54cc7dc2c37ec006bcc6d1db")
480 ciphertext, _ := hex.DecodeString("0e1bde206a07a9c2c1b65300f8c649972b4401346697138c7a4891ee59867d0c")
481
482 aes, _ := aes.NewCipher(key)
483 aesgcm, _ := cipher.NewGCM(aes)
484
485 dst := make([]byte, len(ciphertext)-16)
486 for i := range dst {
487 dst[i] = 42
488 }
489
490 result, err := aesgcm.Open(dst[:0], nonce, ciphertext, nil)
491 if err == nil {
492 t.Fatal("Bad Open still resulted in nil error.")
493 }
494
495 if result != nil {
496 t.Fatal("Failed Open returned non-nil result.")
497 }
498
499 for i := range dst {
500 if dst[i] != 0 {
501 t.Fatal("Failed Open didn't zero dst buffer")
502 }
503 }
504 }
505
506 func TestGCMCounterWrap(t *testing.T) {
507
508 tests := []struct {
509 nonce, tag string
510 }{
511 {"0fa72e25", "37e1948cdfff09fbde0c40ad99fee4a7"},
512 {"afe05cc1", "438f3aa9fee5e54903b1927bca26bbdf"},
513 {"9ffecbef", "7b88ca424df9703e9e8611071ec7e16e"},
514 {"ffc3e5b3", "38d49c86e0abe853ac250e66da54c01a"},
515 {"cfdd729d", "e08402eaac36a1a402e09b1bd56500e8"},
516 {"010ae3d486", "5405bb490b1f95d01e2ba735687154bc"},
517 {"01b1107a9d", "939a585f342e01e17844627492d44dbf"},
518 }
519 key, err := aes.NewCipher(make([]byte, 16))
520 if err != nil {
521 t.Fatal(err)
522 }
523 plaintext := make([]byte, 16*17+1)
524 for i, test := range tests {
525 nonce, _ := hex.DecodeString(test.nonce)
526 want, _ := hex.DecodeString(test.tag)
527 aead, err := cipher.NewGCMWithNonceSize(key, len(nonce))
528 if err != nil {
529 t.Fatal(err)
530 }
531 got := aead.Seal(nil, nonce, plaintext, nil)
532 if !bytes.Equal(got[len(plaintext):], want) {
533 t.Errorf("test[%v]: got: %x, want: %x", i, got[len(plaintext):], want)
534 }
535 _, err = aead.Open(nil, nonce, got, nil)
536 if err != nil {
537 t.Errorf("test[%v]: authentication failed", i)
538 }
539 }
540 }
541
542 var _ cipher.Block = (*wrapper)(nil)
543
544 type wrapper struct {
545 block cipher.Block
546 }
547
548 func (w *wrapper) BlockSize() int { return w.block.BlockSize() }
549 func (w *wrapper) Encrypt(dst, src []byte) { w.block.Encrypt(dst, src) }
550 func (w *wrapper) Decrypt(dst, src []byte) { w.block.Decrypt(dst, src) }
551
552
553
554 func wrap(b cipher.Block) cipher.Block {
555 return &wrapper{b}
556 }
557
558 func TestGCMAsm(t *testing.T) {
559
560
561 newAESGCM := func(key []byte) (asm, generic cipher.AEAD, err error) {
562 block, err := aes.NewCipher(key[:])
563 if err != nil {
564 return nil, nil, err
565 }
566 asm, err = cipher.NewGCM(block)
567 if err != nil {
568 return nil, nil, err
569 }
570 generic, err = cipher.NewGCM(wrap(block))
571 if err != nil {
572 return nil, nil, err
573 }
574 return asm, generic, nil
575 }
576
577
578 var key [16]byte
579 asm, generic, err := newAESGCM(key[:])
580 if err != nil {
581 t.Fatal(err)
582 }
583 if reflect.TypeOf(asm) == reflect.TypeOf(generic) {
584 t.Skipf("no assembly implementation of GCM")
585 }
586
587
588 type pair struct{ align, length int }
589 lengths := []int{0, 156, 8192, 8193, 8208}
590 keySizes := []int{16, 24, 32}
591 alignments := []int{0, 1, 2, 3}
592 if testing.Short() {
593 keySizes = []int{16}
594 alignments = []int{1}
595 }
596 perms := make([]pair, 0)
597 for _, l := range lengths {
598 for _, a := range alignments {
599 if a != 0 && l == 0 {
600 continue
601 }
602 perms = append(perms, pair{align: a, length: l})
603 }
604 }
605
606
607 test := func(ks int, pt, ad []byte) error {
608 key := make([]byte, ks)
609 if _, err := io.ReadFull(rand.Reader, key); err != nil {
610 return err
611 }
612 asm, generic, err := newAESGCM(key)
613 if err != nil {
614 return err
615 }
616 if _, err := io.ReadFull(rand.Reader, pt); err != nil {
617 return err
618 }
619 if _, err := io.ReadFull(rand.Reader, ad); err != nil {
620 return err
621 }
622 nonce := make([]byte, 12)
623 if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
624 return err
625 }
626 want := generic.Seal(nil, nonce, pt, ad)
627 got := asm.Seal(nil, nonce, pt, ad)
628 if !bytes.Equal(want, got) {
629 return errors.New("incorrect Seal output")
630 }
631 got, err = asm.Open(nil, nonce, want, ad)
632 if err != nil {
633 return errors.New("authentication failed")
634 }
635 if !bytes.Equal(pt, got) {
636 return errors.New("incorrect Open output")
637 }
638 return nil
639 }
640 for _, a := range perms {
641 ad := make([]byte, a.align+a.length)
642 ad = ad[a.align:]
643 for _, p := range perms {
644 pt := make([]byte, p.align+p.length)
645 pt = pt[p.align:]
646 for _, ks := range keySizes {
647 if err := test(ks, pt, ad); err != nil {
648 t.Error(err)
649 t.Errorf(" key size: %v", ks)
650 t.Errorf(" plaintext alignment: %v", p.align)
651 t.Errorf(" plaintext length: %v", p.length)
652 t.Errorf(" additionalData alignment: %v", a.align)
653 t.Fatalf(" additionalData length: %v", a.length)
654 }
655 }
656 }
657 }
658 }
659
660
661 func TestGCMAEAD(t *testing.T) {
662 minTagSize := 12
663
664 for _, keySize := range []int{128, 192, 256} {
665
666 t.Run(fmt.Sprintf("AES-%d", keySize), func(t *testing.T) {
667 rng := newRandReader(t)
668
669 key := make([]byte, keySize/8)
670 rng.Read(key)
671
672 block, err := aes.NewCipher(key)
673 if err != nil {
674 panic(err)
675 }
676
677
678
679 cryptotest.TestAEAD(t, func() (cipher.AEAD, error) { return cipher.NewGCM(block) })
680
681
682 t.Run("MinTagSize", func(t *testing.T) {
683 cryptotest.TestAEAD(t, func() (cipher.AEAD, error) { return cipher.NewGCMWithTagSize(block, minTagSize) })
684 })
685
686
687 for _, nonceSize := range []int{1, 16, 100} {
688 t.Run(fmt.Sprintf("NonceSize-%d", nonceSize), func(t *testing.T) {
689
690 cryptotest.TestAEAD(t, func() (cipher.AEAD, error) { return cipher.NewGCMWithNonceSize(block, nonceSize) })
691 })
692 }
693 })
694 }
695 }
696
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