1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Minimal library implementation of GCM |
4 | * |
5 | * Copyright 2022 Google LLC |
6 | */ |
7 | |
8 | #include <linux/module.h> |
9 | |
10 | #include <crypto/algapi.h> |
11 | #include <crypto/gcm.h> |
12 | #include <crypto/ghash.h> |
13 | |
14 | #include <asm/irqflags.h> |
15 | |
16 | static void aesgcm_encrypt_block(const struct crypto_aes_ctx *ctx, void *dst, |
17 | const void *src) |
18 | { |
19 | unsigned long flags; |
20 | |
21 | /* |
22 | * In AES-GCM, both the GHASH key derivation and the CTR mode |
23 | * encryption operate on known plaintext, making them susceptible to |
24 | * timing attacks on the encryption key. The AES library already |
25 | * mitigates this risk to some extent by pulling the entire S-box into |
26 | * the caches before doing any substitutions, but this strategy is more |
27 | * effective when running with interrupts disabled. |
28 | */ |
29 | local_irq_save(flags); |
30 | aes_encrypt(ctx, out: dst, in: src); |
31 | local_irq_restore(flags); |
32 | } |
33 | |
34 | /** |
35 | * aesgcm_expandkey - Expands the AES and GHASH keys for the AES-GCM key |
36 | * schedule |
37 | * |
38 | * @ctx: The data structure that will hold the AES-GCM key schedule |
39 | * @key: The AES encryption input key |
40 | * @keysize: The length in bytes of the input key |
41 | * @authsize: The size in bytes of the GCM authentication tag |
42 | * |
43 | * Returns: 0 on success, or -EINVAL if @keysize or @authsize contain values |
44 | * that are not permitted by the GCM specification. |
45 | */ |
46 | int aesgcm_expandkey(struct aesgcm_ctx *ctx, const u8 *key, |
47 | unsigned int keysize, unsigned int authsize) |
48 | { |
49 | u8 kin[AES_BLOCK_SIZE] = {}; |
50 | int ret; |
51 | |
52 | ret = crypto_gcm_check_authsize(authsize) ?: |
53 | aes_expandkey(ctx: &ctx->aes_ctx, in_key: key, key_len: keysize); |
54 | if (ret) |
55 | return ret; |
56 | |
57 | ctx->authsize = authsize; |
58 | aesgcm_encrypt_block(ctx: &ctx->aes_ctx, dst: &ctx->ghash_key, src: kin); |
59 | |
60 | return 0; |
61 | } |
62 | EXPORT_SYMBOL(aesgcm_expandkey); |
63 | |
64 | static void aesgcm_ghash(be128 *ghash, const be128 *key, const void *src, |
65 | int len) |
66 | { |
67 | while (len > 0) { |
68 | crypto_xor(dst: (u8 *)ghash, src, min(len, GHASH_BLOCK_SIZE)); |
69 | gf128mul_lle(a: ghash, b: key); |
70 | |
71 | src += GHASH_BLOCK_SIZE; |
72 | len -= GHASH_BLOCK_SIZE; |
73 | } |
74 | } |
75 | |
76 | /** |
77 | * aesgcm_mac - Generates the authentication tag using AES-GCM algorithm. |
78 | * @ctx: The data structure that will hold the AES-GCM key schedule |
79 | * @src: The input source data. |
80 | * @src_len: Length of the source data. |
81 | * @assoc: Points to the associated data. |
82 | * @assoc_len: Length of the associated data values. |
83 | * @ctr: Points to the counter value. |
84 | * @authtag: The output buffer for the authentication tag. |
85 | * |
86 | * It takes in the AES-GCM context, source data, associated data, counter value, |
87 | * and an output buffer for the authentication tag. |
88 | */ |
89 | static void aesgcm_mac(const struct aesgcm_ctx *ctx, const u8 *src, int src_len, |
90 | const u8 *assoc, int assoc_len, __be32 *ctr, u8 *authtag) |
91 | { |
92 | be128 tail = { cpu_to_be64(assoc_len * 8), cpu_to_be64(src_len * 8) }; |
93 | u8 buf[AES_BLOCK_SIZE]; |
94 | be128 ghash = {}; |
95 | |
96 | aesgcm_ghash(ghash: &ghash, key: &ctx->ghash_key, src: assoc, len: assoc_len); |
97 | aesgcm_ghash(ghash: &ghash, key: &ctx->ghash_key, src, len: src_len); |
98 | aesgcm_ghash(ghash: &ghash, key: &ctx->ghash_key, src: &tail, len: sizeof(tail)); |
99 | |
100 | ctr[3] = cpu_to_be32(1); |
101 | aesgcm_encrypt_block(ctx: &ctx->aes_ctx, dst: buf, src: ctr); |
102 | crypto_xor_cpy(dst: authtag, src1: buf, src2: (u8 *)&ghash, size: ctx->authsize); |
103 | |
104 | memzero_explicit(s: &ghash, count: sizeof(ghash)); |
105 | memzero_explicit(s: buf, count: sizeof(buf)); |
106 | } |
107 | |
108 | static void aesgcm_crypt(const struct aesgcm_ctx *ctx, u8 *dst, const u8 *src, |
109 | int len, __be32 *ctr) |
110 | { |
111 | u8 buf[AES_BLOCK_SIZE]; |
112 | unsigned int n = 2; |
113 | |
114 | while (len > 0) { |
115 | /* |
116 | * The counter increment below must not result in overflow or |
117 | * carry into the next 32-bit word, as this could result in |
118 | * inadvertent IV reuse, which must be avoided at all cost for |
119 | * stream ciphers such as AES-CTR. Given the range of 'int |
120 | * len', this cannot happen, so no explicit test is necessary. |
121 | */ |
122 | ctr[3] = cpu_to_be32(n++); |
123 | aesgcm_encrypt_block(ctx: &ctx->aes_ctx, dst: buf, src: ctr); |
124 | crypto_xor_cpy(dst, src1: src, src2: buf, min(len, AES_BLOCK_SIZE)); |
125 | |
126 | dst += AES_BLOCK_SIZE; |
127 | src += AES_BLOCK_SIZE; |
128 | len -= AES_BLOCK_SIZE; |
129 | } |
130 | memzero_explicit(s: buf, count: sizeof(buf)); |
131 | } |
132 | |
133 | /** |
134 | * aesgcm_encrypt - Perform AES-GCM encryption on a block of data |
135 | * |
136 | * @ctx: The AES-GCM key schedule |
137 | * @dst: Pointer to the ciphertext output buffer |
138 | * @src: Pointer the plaintext (may equal @dst for encryption in place) |
139 | * @crypt_len: The size in bytes of the plaintext and ciphertext. |
140 | * @assoc: Pointer to the associated data, |
141 | * @assoc_len: The size in bytes of the associated data |
142 | * @iv: The initialization vector (IV) to use for this block of data |
143 | * (must be 12 bytes in size as per the GCM spec recommendation) |
144 | * @authtag: The address of the buffer in memory where the authentication |
145 | * tag should be stored. The buffer is assumed to have space for |
146 | * @ctx->authsize bytes. |
147 | */ |
148 | void aesgcm_encrypt(const struct aesgcm_ctx *ctx, u8 *dst, const u8 *src, |
149 | int crypt_len, const u8 *assoc, int assoc_len, |
150 | const u8 iv[GCM_AES_IV_SIZE], u8 *authtag) |
151 | { |
152 | __be32 ctr[4]; |
153 | |
154 | memcpy(ctr, iv, GCM_AES_IV_SIZE); |
155 | |
156 | aesgcm_crypt(ctx, dst, src, len: crypt_len, ctr); |
157 | aesgcm_mac(ctx, src: dst, src_len: crypt_len, assoc, assoc_len, ctr, authtag); |
158 | } |
159 | EXPORT_SYMBOL(aesgcm_encrypt); |
160 | |
161 | /** |
162 | * aesgcm_decrypt - Perform AES-GCM decryption on a block of data |
163 | * |
164 | * @ctx: The AES-GCM key schedule |
165 | * @dst: Pointer to the plaintext output buffer |
166 | * @src: Pointer the ciphertext (may equal @dst for decryption in place) |
167 | * @crypt_len: The size in bytes of the plaintext and ciphertext. |
168 | * @assoc: Pointer to the associated data, |
169 | * @assoc_len: The size in bytes of the associated data |
170 | * @iv: The initialization vector (IV) to use for this block of data |
171 | * (must be 12 bytes in size as per the GCM spec recommendation) |
172 | * @authtag: The address of the buffer in memory where the authentication |
173 | * tag is stored. |
174 | * |
175 | * Returns: true on success, or false if the ciphertext failed authentication. |
176 | * On failure, no plaintext will be returned. |
177 | */ |
178 | bool __must_check aesgcm_decrypt(const struct aesgcm_ctx *ctx, u8 *dst, |
179 | const u8 *src, int crypt_len, const u8 *assoc, |
180 | int assoc_len, const u8 iv[GCM_AES_IV_SIZE], |
181 | const u8 *authtag) |
182 | { |
183 | u8 tagbuf[AES_BLOCK_SIZE]; |
184 | __be32 ctr[4]; |
185 | |
186 | memcpy(ctr, iv, GCM_AES_IV_SIZE); |
187 | |
188 | aesgcm_mac(ctx, src, src_len: crypt_len, assoc, assoc_len, ctr, authtag: tagbuf); |
189 | if (crypto_memneq(a: authtag, b: tagbuf, size: ctx->authsize)) { |
190 | memzero_explicit(s: tagbuf, count: sizeof(tagbuf)); |
191 | return false; |
192 | } |
193 | aesgcm_crypt(ctx, dst, src, len: crypt_len, ctr); |
194 | return true; |
195 | } |
196 | EXPORT_SYMBOL(aesgcm_decrypt); |
197 | |
198 | MODULE_DESCRIPTION("Generic AES-GCM library" ); |
199 | MODULE_AUTHOR("Ard Biesheuvel <ardb@kernel.org>" ); |
200 | MODULE_LICENSE("GPL" ); |
201 | |
202 | #ifndef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS |
203 | |
204 | /* |
205 | * Test code below. Vectors taken from crypto/testmgr.h |
206 | */ |
207 | |
208 | static const u8 __initconst ctext0[16] = |
209 | "\x58\xe2\xfc\xce\xfa\x7e\x30\x61" |
210 | "\x36\x7f\x1d\x57\xa4\xe7\x45\x5a" ; |
211 | |
212 | static const u8 __initconst ptext1[16]; |
213 | |
214 | static const u8 __initconst ctext1[32] = |
215 | "\x03\x88\xda\xce\x60\xb6\xa3\x92" |
216 | "\xf3\x28\xc2\xb9\x71\xb2\xfe\x78" |
217 | "\xab\x6e\x47\xd4\x2c\xec\x13\xbd" |
218 | "\xf5\x3a\x67\xb2\x12\x57\xbd\xdf" ; |
219 | |
220 | static const u8 __initconst ptext2[64] = |
221 | "\xd9\x31\x32\x25\xf8\x84\x06\xe5" |
222 | "\xa5\x59\x09\xc5\xaf\xf5\x26\x9a" |
223 | "\x86\xa7\xa9\x53\x15\x34\xf7\xda" |
224 | "\x2e\x4c\x30\x3d\x8a\x31\x8a\x72" |
225 | "\x1c\x3c\x0c\x95\x95\x68\x09\x53" |
226 | "\x2f\xcf\x0e\x24\x49\xa6\xb5\x25" |
227 | "\xb1\x6a\xed\xf5\xaa\x0d\xe6\x57" |
228 | "\xba\x63\x7b\x39\x1a\xaf\xd2\x55" ; |
229 | |
230 | static const u8 __initconst ctext2[80] = |
231 | "\x42\x83\x1e\xc2\x21\x77\x74\x24" |
232 | "\x4b\x72\x21\xb7\x84\xd0\xd4\x9c" |
233 | "\xe3\xaa\x21\x2f\x2c\x02\xa4\xe0" |
234 | "\x35\xc1\x7e\x23\x29\xac\xa1\x2e" |
235 | "\x21\xd5\x14\xb2\x54\x66\x93\x1c" |
236 | "\x7d\x8f\x6a\x5a\xac\x84\xaa\x05" |
237 | "\x1b\xa3\x0b\x39\x6a\x0a\xac\x97" |
238 | "\x3d\x58\xe0\x91\x47\x3f\x59\x85" |
239 | "\x4d\x5c\x2a\xf3\x27\xcd\x64\xa6" |
240 | "\x2c\xf3\x5a\xbd\x2b\xa6\xfa\xb4" ; |
241 | |
242 | static const u8 __initconst ptext3[60] = |
243 | "\xd9\x31\x32\x25\xf8\x84\x06\xe5" |
244 | "\xa5\x59\x09\xc5\xaf\xf5\x26\x9a" |
245 | "\x86\xa7\xa9\x53\x15\x34\xf7\xda" |
246 | "\x2e\x4c\x30\x3d\x8a\x31\x8a\x72" |
247 | "\x1c\x3c\x0c\x95\x95\x68\x09\x53" |
248 | "\x2f\xcf\x0e\x24\x49\xa6\xb5\x25" |
249 | "\xb1\x6a\xed\xf5\xaa\x0d\xe6\x57" |
250 | "\xba\x63\x7b\x39" ; |
251 | |
252 | static const u8 __initconst ctext3[76] = |
253 | "\x42\x83\x1e\xc2\x21\x77\x74\x24" |
254 | "\x4b\x72\x21\xb7\x84\xd0\xd4\x9c" |
255 | "\xe3\xaa\x21\x2f\x2c\x02\xa4\xe0" |
256 | "\x35\xc1\x7e\x23\x29\xac\xa1\x2e" |
257 | "\x21\xd5\x14\xb2\x54\x66\x93\x1c" |
258 | "\x7d\x8f\x6a\x5a\xac\x84\xaa\x05" |
259 | "\x1b\xa3\x0b\x39\x6a\x0a\xac\x97" |
260 | "\x3d\x58\xe0\x91" |
261 | "\x5b\xc9\x4f\xbc\x32\x21\xa5\xdb" |
262 | "\x94\xfa\xe9\x5a\xe7\x12\x1a\x47" ; |
263 | |
264 | static const u8 __initconst ctext4[16] = |
265 | "\xcd\x33\xb2\x8a\xc7\x73\xf7\x4b" |
266 | "\xa0\x0e\xd1\xf3\x12\x57\x24\x35" ; |
267 | |
268 | static const u8 __initconst ctext5[32] = |
269 | "\x98\xe7\x24\x7c\x07\xf0\xfe\x41" |
270 | "\x1c\x26\x7e\x43\x84\xb0\xf6\x00" |
271 | "\x2f\xf5\x8d\x80\x03\x39\x27\xab" |
272 | "\x8e\xf4\xd4\x58\x75\x14\xf0\xfb" ; |
273 | |
274 | static const u8 __initconst ptext6[64] = |
275 | "\xd9\x31\x32\x25\xf8\x84\x06\xe5" |
276 | "\xa5\x59\x09\xc5\xaf\xf5\x26\x9a" |
277 | "\x86\xa7\xa9\x53\x15\x34\xf7\xda" |
278 | "\x2e\x4c\x30\x3d\x8a\x31\x8a\x72" |
279 | "\x1c\x3c\x0c\x95\x95\x68\x09\x53" |
280 | "\x2f\xcf\x0e\x24\x49\xa6\xb5\x25" |
281 | "\xb1\x6a\xed\xf5\xaa\x0d\xe6\x57" |
282 | "\xba\x63\x7b\x39\x1a\xaf\xd2\x55" ; |
283 | |
284 | static const u8 __initconst ctext6[80] = |
285 | "\x39\x80\xca\x0b\x3c\x00\xe8\x41" |
286 | "\xeb\x06\xfa\xc4\x87\x2a\x27\x57" |
287 | "\x85\x9e\x1c\xea\xa6\xef\xd9\x84" |
288 | "\x62\x85\x93\xb4\x0c\xa1\xe1\x9c" |
289 | "\x7d\x77\x3d\x00\xc1\x44\xc5\x25" |
290 | "\xac\x61\x9d\x18\xc8\x4a\x3f\x47" |
291 | "\x18\xe2\x44\x8b\x2f\xe3\x24\xd9" |
292 | "\xcc\xda\x27\x10\xac\xad\xe2\x56" |
293 | "\x99\x24\xa7\xc8\x58\x73\x36\xbf" |
294 | "\xb1\x18\x02\x4d\xb8\x67\x4a\x14" ; |
295 | |
296 | static const u8 __initconst ctext7[16] = |
297 | "\x53\x0f\x8a\xfb\xc7\x45\x36\xb9" |
298 | "\xa9\x63\xb4\xf1\xc4\xcb\x73\x8b" ; |
299 | |
300 | static const u8 __initconst ctext8[32] = |
301 | "\xce\xa7\x40\x3d\x4d\x60\x6b\x6e" |
302 | "\x07\x4e\xc5\xd3\xba\xf3\x9d\x18" |
303 | "\xd0\xd1\xc8\xa7\x99\x99\x6b\xf0" |
304 | "\x26\x5b\x98\xb5\xd4\x8a\xb9\x19" ; |
305 | |
306 | static const u8 __initconst ptext9[64] = |
307 | "\xd9\x31\x32\x25\xf8\x84\x06\xe5" |
308 | "\xa5\x59\x09\xc5\xaf\xf5\x26\x9a" |
309 | "\x86\xa7\xa9\x53\x15\x34\xf7\xda" |
310 | "\x2e\x4c\x30\x3d\x8a\x31\x8a\x72" |
311 | "\x1c\x3c\x0c\x95\x95\x68\x09\x53" |
312 | "\x2f\xcf\x0e\x24\x49\xa6\xb5\x25" |
313 | "\xb1\x6a\xed\xf5\xaa\x0d\xe6\x57" |
314 | "\xba\x63\x7b\x39\x1a\xaf\xd2\x55" ; |
315 | |
316 | static const u8 __initconst ctext9[80] = |
317 | "\x52\x2d\xc1\xf0\x99\x56\x7d\x07" |
318 | "\xf4\x7f\x37\xa3\x2a\x84\x42\x7d" |
319 | "\x64\x3a\x8c\xdc\xbf\xe5\xc0\xc9" |
320 | "\x75\x98\xa2\xbd\x25\x55\xd1\xaa" |
321 | "\x8c\xb0\x8e\x48\x59\x0d\xbb\x3d" |
322 | "\xa7\xb0\x8b\x10\x56\x82\x88\x38" |
323 | "\xc5\xf6\x1e\x63\x93\xba\x7a\x0a" |
324 | "\xbc\xc9\xf6\x62\x89\x80\x15\xad" |
325 | "\xb0\x94\xda\xc5\xd9\x34\x71\xbd" |
326 | "\xec\x1a\x50\x22\x70\xe3\xcc\x6c" ; |
327 | |
328 | static const u8 __initconst ptext10[60] = |
329 | "\xd9\x31\x32\x25\xf8\x84\x06\xe5" |
330 | "\xa5\x59\x09\xc5\xaf\xf5\x26\x9a" |
331 | "\x86\xa7\xa9\x53\x15\x34\xf7\xda" |
332 | "\x2e\x4c\x30\x3d\x8a\x31\x8a\x72" |
333 | "\x1c\x3c\x0c\x95\x95\x68\x09\x53" |
334 | "\x2f\xcf\x0e\x24\x49\xa6\xb5\x25" |
335 | "\xb1\x6a\xed\xf5\xaa\x0d\xe6\x57" |
336 | "\xba\x63\x7b\x39" ; |
337 | |
338 | static const u8 __initconst ctext10[76] = |
339 | "\x52\x2d\xc1\xf0\x99\x56\x7d\x07" |
340 | "\xf4\x7f\x37\xa3\x2a\x84\x42\x7d" |
341 | "\x64\x3a\x8c\xdc\xbf\xe5\xc0\xc9" |
342 | "\x75\x98\xa2\xbd\x25\x55\xd1\xaa" |
343 | "\x8c\xb0\x8e\x48\x59\x0d\xbb\x3d" |
344 | "\xa7\xb0\x8b\x10\x56\x82\x88\x38" |
345 | "\xc5\xf6\x1e\x63\x93\xba\x7a\x0a" |
346 | "\xbc\xc9\xf6\x62" |
347 | "\x76\xfc\x6e\xce\x0f\x4e\x17\x68" |
348 | "\xcd\xdf\x88\x53\xbb\x2d\x55\x1b" ; |
349 | |
350 | static const u8 __initconst ptext11[60] = |
351 | "\xd9\x31\x32\x25\xf8\x84\x06\xe5" |
352 | "\xa5\x59\x09\xc5\xaf\xf5\x26\x9a" |
353 | "\x86\xa7\xa9\x53\x15\x34\xf7\xda" |
354 | "\x2e\x4c\x30\x3d\x8a\x31\x8a\x72" |
355 | "\x1c\x3c\x0c\x95\x95\x68\x09\x53" |
356 | "\x2f\xcf\x0e\x24\x49\xa6\xb5\x25" |
357 | "\xb1\x6a\xed\xf5\xaa\x0d\xe6\x57" |
358 | "\xba\x63\x7b\x39" ; |
359 | |
360 | static const u8 __initconst ctext11[76] = |
361 | "\x39\x80\xca\x0b\x3c\x00\xe8\x41" |
362 | "\xeb\x06\xfa\xc4\x87\x2a\x27\x57" |
363 | "\x85\x9e\x1c\xea\xa6\xef\xd9\x84" |
364 | "\x62\x85\x93\xb4\x0c\xa1\xe1\x9c" |
365 | "\x7d\x77\x3d\x00\xc1\x44\xc5\x25" |
366 | "\xac\x61\x9d\x18\xc8\x4a\x3f\x47" |
367 | "\x18\xe2\x44\x8b\x2f\xe3\x24\xd9" |
368 | "\xcc\xda\x27\x10" |
369 | "\x25\x19\x49\x8e\x80\xf1\x47\x8f" |
370 | "\x37\xba\x55\xbd\x6d\x27\x61\x8c" ; |
371 | |
372 | static const u8 __initconst ptext12[719] = |
373 | "\x42\xc1\xcc\x08\x48\x6f\x41\x3f" |
374 | "\x2f\x11\x66\x8b\x2a\x16\xf0\xe0" |
375 | "\x58\x83\xf0\xc3\x70\x14\xc0\x5b" |
376 | "\x3f\xec\x1d\x25\x3c\x51\xd2\x03" |
377 | "\xcf\x59\x74\x1f\xb2\x85\xb4\x07" |
378 | "\xc6\x6a\x63\x39\x8a\x5b\xde\xcb" |
379 | "\xaf\x08\x44\xbd\x6f\x91\x15\xe1" |
380 | "\xf5\x7a\x6e\x18\xbd\xdd\x61\x50" |
381 | "\x59\xa9\x97\xab\xbb\x0e\x74\x5c" |
382 | "\x00\xa4\x43\x54\x04\x54\x9b\x3b" |
383 | "\x77\xec\xfd\x5c\xa6\xe8\x7b\x08" |
384 | "\xae\xe6\x10\x3f\x32\x65\xd1\xfc" |
385 | "\xa4\x1d\x2c\x31\xfb\x33\x7a\xb3" |
386 | "\x35\x23\xf4\x20\x41\xd4\xad\x82" |
387 | "\x8b\xa4\xad\x96\x1c\x20\x53\xbe" |
388 | "\x0e\xa6\xf4\xdc\x78\x49\x3e\x72" |
389 | "\xb1\xa9\xb5\x83\xcb\x08\x54\xb7" |
390 | "\xad\x49\x3a\xae\x98\xce\xa6\x66" |
391 | "\x10\x30\x90\x8c\x55\x83\xd7\x7c" |
392 | "\x8b\xe6\x53\xde\xd2\x6e\x18\x21" |
393 | "\x01\x52\xd1\x9f\x9d\xbb\x9c\x73" |
394 | "\x57\xcc\x89\x09\x75\x9b\x78\x70" |
395 | "\xed\x26\x97\x4d\xb4\xe4\x0c\xa5" |
396 | "\xfa\x70\x04\x70\xc6\x96\x1c\x7d" |
397 | "\x54\x41\x77\xa8\xe3\xb0\x7e\x96" |
398 | "\x82\xd9\xec\xa2\x87\x68\x55\xf9" |
399 | "\x8f\x9e\x73\x43\x47\x6a\x08\x36" |
400 | "\x93\x67\xa8\x2d\xde\xac\x41\xa9" |
401 | "\x5c\x4d\x73\x97\x0f\x70\x68\xfa" |
402 | "\x56\x4d\x00\xc2\x3b\x1f\xc8\xb9" |
403 | "\x78\x1f\x51\x07\xe3\x9a\x13\x4e" |
404 | "\xed\x2b\x2e\xa3\xf7\x44\xb2\xe7" |
405 | "\xab\x19\x37\xd9\xba\x76\x5e\xd2" |
406 | "\xf2\x53\x15\x17\x4c\x6b\x16\x9f" |
407 | "\x02\x66\x49\xca\x7c\x91\x05\xf2" |
408 | "\x45\x36\x1e\xf5\x77\xad\x1f\x46" |
409 | "\xa8\x13\xfb\x63\xb6\x08\x99\x63" |
410 | "\x82\xa2\xed\xb3\xac\xdf\x43\x19" |
411 | "\x45\xea\x78\x73\xd9\xb7\x39\x11" |
412 | "\xa3\x13\x7c\xf8\x3f\xf7\xad\x81" |
413 | "\x48\x2f\xa9\x5c\x5f\xa0\xf0\x79" |
414 | "\xa4\x47\x7d\x80\x20\x26\xfd\x63" |
415 | "\x0a\xc7\x7e\x6d\x75\x47\xff\x76" |
416 | "\x66\x2e\x8a\x6c\x81\x35\xaf\x0b" |
417 | "\x2e\x6a\x49\x60\xc1\x10\xe1\xe1" |
418 | "\x54\x03\xa4\x09\x0c\x37\x7a\x15" |
419 | "\x23\x27\x5b\x8b\x4b\xa5\x64\x97" |
420 | "\xae\x4a\x50\x73\x1f\x66\x1c\x5c" |
421 | "\x03\x25\x3c\x8d\x48\x58\x71\x34" |
422 | "\x0e\xec\x4e\x55\x1a\x03\x6a\xe5" |
423 | "\xb6\x19\x2b\x84\x2a\x20\xd1\xea" |
424 | "\x80\x6f\x96\x0e\x05\x62\xc7\x78" |
425 | "\x87\x79\x60\x38\x46\xb4\x25\x57" |
426 | "\x6e\x16\x63\xf8\xad\x6e\xd7\x42" |
427 | "\x69\xe1\x88\xef\x6e\xd5\xb4\x9a" |
428 | "\x3c\x78\x6c\x3b\xe5\xa0\x1d\x22" |
429 | "\x86\x5c\x74\x3a\xeb\x24\x26\xc7" |
430 | "\x09\xfc\x91\x96\x47\x87\x4f\x1a" |
431 | "\xd6\x6b\x2c\x18\x47\xc0\xb8\x24" |
432 | "\xa8\x5a\x4a\x9e\xcb\x03\xe7\x2a" |
433 | "\x09\xe6\x4d\x9c\x6d\x86\x60\xf5" |
434 | "\x2f\x48\x69\x37\x9f\xf2\xd2\xcb" |
435 | "\x0e\x5a\xdd\x6e\x8a\xfb\x6a\xfe" |
436 | "\x0b\x63\xde\x87\x42\x79\x8a\x68" |
437 | "\x51\x28\x9b\x7a\xeb\xaf\xb8\x2f" |
438 | "\x9d\xd1\xc7\x45\x90\x08\xc9\x83" |
439 | "\xe9\x83\x84\xcb\x28\x69\x09\x69" |
440 | "\xce\x99\x46\x00\x54\xcb\xd8\x38" |
441 | "\xf9\x53\x4a\xbf\x31\xce\x57\x15" |
442 | "\x33\xfa\x96\x04\x33\x42\xe3\xc0" |
443 | "\xb7\x54\x4a\x65\x7a\x7c\x02\xe6" |
444 | "\x19\x95\xd0\x0e\x82\x07\x63\xf9" |
445 | "\xe1\x2b\x2a\xfc\x55\x92\x52\xc9" |
446 | "\xb5\x9f\x23\x28\x60\xe7\x20\x51" |
447 | "\x10\xd3\xed\x6d\x9b\xab\xb8\xe2" |
448 | "\x5d\x9a\x34\xb3\xbe\x9c\x64\xcb" |
449 | "\x78\xc6\x91\x22\x40\x91\x80\xbe" |
450 | "\xd7\x78\x5c\x0e\x0a\xdc\x08\xe9" |
451 | "\x67\x10\xa4\x83\x98\x79\x23\xe7" |
452 | "\x92\xda\xa9\x22\x16\xb1\xe7\x78" |
453 | "\xa3\x1c\x6c\x8f\x35\x7c\x4d\x37" |
454 | "\x2f\x6e\x0b\x50\x5c\x34\xb9\xf9" |
455 | "\xe6\x3d\x91\x0d\x32\x95\xaa\x3d" |
456 | "\x48\x11\x06\xbb\x2d\xf2\x63\x88" |
457 | "\x3f\x73\x09\xe2\x45\x56\x31\x51" |
458 | "\xfa\x5e\x4e\x62\xf7\x90\xf9\xa9" |
459 | "\x7d\x7b\x1b\xb1\xc8\x26\x6e\x66" |
460 | "\xf6\x90\x9a\x7f\xf2\x57\xcc\x23" |
461 | "\x59\xfa\xfa\xaa\x44\x04\x01\xa7" |
462 | "\xa4\x78\xdb\x74\x3d\x8b\xb5" ; |
463 | |
464 | static const u8 __initconst ctext12[735] = |
465 | "\x84\x0b\xdb\xd5\xb7\xa8\xfe\x20" |
466 | "\xbb\xb1\x12\x7f\x41\xea\xb3\xc0" |
467 | "\xa2\xb4\x37\x19\x11\x58\xb6\x0b" |
468 | "\x4c\x1d\x38\x05\x54\xd1\x16\x73" |
469 | "\x8e\x1c\x20\x90\xa2\x9a\xb7\x74" |
470 | "\x47\xe6\xd8\xfc\x18\x3a\xb4\xea" |
471 | "\xd5\x16\x5a\x2c\x53\x01\x46\xb3" |
472 | "\x18\x33\x74\x6c\x50\xf2\xe8\xc0" |
473 | "\x73\xda\x60\x22\xeb\xe3\xe5\x9b" |
474 | "\x20\x93\x6c\x4b\x37\x99\xb8\x23" |
475 | "\x3b\x4e\xac\xe8\x5b\xe8\x0f\xb7" |
476 | "\xc3\x8f\xfb\x4a\x37\xd9\x39\x95" |
477 | "\x34\xf1\xdb\x8f\x71\xd9\xc7\x0b" |
478 | "\x02\xf1\x63\xfc\x9b\xfc\xc5\xab" |
479 | "\xb9\x14\x13\x21\xdf\xce\xaa\x88" |
480 | "\x44\x30\x1e\xce\x26\x01\x92\xf8" |
481 | "\x9f\x00\x4b\x0c\x4b\xf7\x5f\xe0" |
482 | "\x89\xca\x94\x66\x11\x21\x97\xca" |
483 | "\x3e\x83\x74\x2d\xdb\x4d\x11\xeb" |
484 | "\x97\xc2\x14\xff\x9e\x1e\xa0\x6b" |
485 | "\x08\xb4\x31\x2b\x85\xc6\x85\x6c" |
486 | "\x90\xec\x39\xc0\xec\xb3\xb5\x4e" |
487 | "\xf3\x9c\xe7\x83\x3a\x77\x0a\xf4" |
488 | "\x56\xfe\xce\x18\x33\x6d\x0b\x2d" |
489 | "\x33\xda\xc8\x05\x5c\xb4\x09\x2a" |
490 | "\xde\x6b\x52\x98\x01\xef\x36\x3d" |
491 | "\xbd\xf9\x8f\xa8\x3e\xaa\xcd\xd1" |
492 | "\x01\x2d\x42\x49\xc3\xb6\x84\xbb" |
493 | "\x48\x96\xe0\x90\x93\x6c\x48\x64" |
494 | "\xd4\xfa\x7f\x93\x2c\xa6\x21\xc8" |
495 | "\x7a\x23\x7b\xaa\x20\x56\x12\xae" |
496 | "\x16\x9d\x94\x0f\x54\xa1\xec\xca" |
497 | "\x51\x4e\xf2\x39\xf4\xf8\x5f\x04" |
498 | "\x5a\x0d\xbf\xf5\x83\xa1\x15\xe1" |
499 | "\xf5\x3c\xd8\x62\xa3\xed\x47\x89" |
500 | "\x85\x4c\xe5\xdb\xac\x9e\x17\x1d" |
501 | "\x0c\x09\xe3\x3e\x39\x5b\x4d\x74" |
502 | "\x0e\xf5\x34\xee\x70\x11\x4c\xfd" |
503 | "\xdb\x34\xb1\xb5\x10\x3f\x73\xb7" |
504 | "\xf5\xfa\xed\xb0\x1f\xa5\xcd\x3c" |
505 | "\x8d\x35\x83\xd4\x11\x44\x6e\x6c" |
506 | "\x5b\xe0\x0e\x69\xa5\x39\xe5\xbb" |
507 | "\xa9\x57\x24\x37\xe6\x1f\xdd\xcf" |
508 | "\x16\x2a\x13\xf9\x6a\x2d\x90\xa0" |
509 | "\x03\x60\x7a\xed\x69\xd5\x00\x8b" |
510 | "\x7e\x4f\xcb\xb9\xfa\x91\xb9\x37" |
511 | "\xc1\x26\xce\x90\x97\x22\x64\x64" |
512 | "\xc1\x72\x43\x1b\xf6\xac\xc1\x54" |
513 | "\x8a\x10\x9c\xdd\x8d\xd5\x8e\xb2" |
514 | "\xe4\x85\xda\xe0\x20\x5f\xf4\xb4" |
515 | "\x15\xb5\xa0\x8d\x12\x74\x49\x23" |
516 | "\x3a\xdf\x4a\xd3\xf0\x3b\x89\xeb" |
517 | "\xf8\xcc\x62\x7b\xfb\x93\x07\x41" |
518 | "\x61\x26\x94\x58\x70\xa6\x3c\xe4" |
519 | "\xff\x58\xc4\x13\x3d\xcb\x36\x6b" |
520 | "\x32\xe5\xb2\x6d\x03\x74\x6f\x76" |
521 | "\x93\x77\xde\x48\xc4\xfa\x30\x4a" |
522 | "\xda\x49\x80\x77\x0f\x1c\xbe\x11" |
523 | "\xc8\x48\xb1\xe5\xbb\xf2\x8a\xe1" |
524 | "\x96\x2f\x9f\xd1\x8e\x8a\x5c\xe2" |
525 | "\xf7\xd7\xd8\x54\xf3\x3f\xc4\x91" |
526 | "\xb8\xfb\x86\xdc\x46\x24\x91\x60" |
527 | "\x6c\x2f\xc9\x41\x37\x51\x49\x54" |
528 | "\x09\x81\x21\xf3\x03\x9f\x2b\xe3" |
529 | "\x1f\x39\x63\xaf\xf4\xd7\x53\x60" |
530 | "\xa7\xc7\x54\xf9\xee\xb1\xb1\x7d" |
531 | "\x75\x54\x65\x93\xfe\xb1\x68\x6b" |
532 | "\x57\x02\xf9\xbb\x0e\xf9\xf8\xbf" |
533 | "\x01\x12\x27\xb4\xfe\xe4\x79\x7a" |
534 | "\x40\x5b\x51\x4b\xdf\x38\xec\xb1" |
535 | "\x6a\x56\xff\x35\x4d\x42\x33\xaa" |
536 | "\x6f\x1b\xe4\xdc\xe0\xdb\x85\x35" |
537 | "\x62\x10\xd4\xec\xeb\xc5\x7e\x45" |
538 | "\x1c\x6f\x17\xca\x3b\x8e\x2d\x66" |
539 | "\x4f\x4b\x36\x56\xcd\x1b\x59\xaa" |
540 | "\xd2\x9b\x17\xb9\x58\xdf\x7b\x64" |
541 | "\x8a\xff\x3b\x9c\xa6\xb5\x48\x9e" |
542 | "\xaa\xe2\x5d\x09\x71\x32\x5f\xb6" |
543 | "\x29\xbe\xe7\xc7\x52\x7e\x91\x82" |
544 | "\x6b\x6d\x33\xe1\x34\x06\x36\x21" |
545 | "\x5e\xbe\x1e\x2f\x3e\xc1\xfb\xea" |
546 | "\x49\x2c\xb5\xca\xf7\xb0\x37\xea" |
547 | "\x1f\xed\x10\x04\xd9\x48\x0d\x1a" |
548 | "\x1c\xfb\xe7\x84\x0e\x83\x53\x74" |
549 | "\xc7\x65\xe2\x5c\xe5\xba\x73\x4c" |
550 | "\x0e\xe1\xb5\x11\x45\x61\x43\x46" |
551 | "\xaa\x25\x8f\xbd\x85\x08\xfa\x4c" |
552 | "\x15\xc1\xc0\xd8\xf5\xdc\x16\xbb" |
553 | "\x7b\x1d\xe3\x87\x57\xa7\x2a\x1d" |
554 | "\x38\x58\x9e\x8a\x43\xdc\x57" |
555 | "\xd1\x81\x7d\x2b\xe9\xff\x99\x3a" |
556 | "\x4b\x24\x52\x58\x55\xe1\x49\x14" ; |
557 | |
558 | static struct { |
559 | const u8 *ptext; |
560 | const u8 *ctext; |
561 | |
562 | u8 key[AES_MAX_KEY_SIZE]; |
563 | u8 iv[GCM_AES_IV_SIZE]; |
564 | u8 assoc[20]; |
565 | |
566 | int klen; |
567 | int clen; |
568 | int plen; |
569 | int alen; |
570 | } const aesgcm_tv[] __initconst = { |
571 | { /* From McGrew & Viega - http://citeseer.ist.psu.edu/656989.html */ |
572 | .klen = 16, |
573 | .ctext = ctext0, |
574 | .clen = sizeof(ctext0), |
575 | }, { |
576 | .klen = 16, |
577 | .ptext = ptext1, |
578 | .plen = sizeof(ptext1), |
579 | .ctext = ctext1, |
580 | .clen = sizeof(ctext1), |
581 | }, { |
582 | .key = "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
583 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" , |
584 | .klen = 16, |
585 | .iv = "\xca\xfe\xba\xbe\xfa\xce\xdb\xad" |
586 | "\xde\xca\xf8\x88" , |
587 | .ptext = ptext2, |
588 | .plen = sizeof(ptext2), |
589 | .ctext = ctext2, |
590 | .clen = sizeof(ctext2), |
591 | }, { |
592 | .key = "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
593 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" , |
594 | .klen = 16, |
595 | .iv = "\xca\xfe\xba\xbe\xfa\xce\xdb\xad" |
596 | "\xde\xca\xf8\x88" , |
597 | .ptext = ptext3, |
598 | .plen = sizeof(ptext3), |
599 | .assoc = "\xfe\xed\xfa\xce\xde\xad\xbe\xef" |
600 | "\xfe\xed\xfa\xce\xde\xad\xbe\xef" |
601 | "\xab\xad\xda\xd2" , |
602 | .alen = 20, |
603 | .ctext = ctext3, |
604 | .clen = sizeof(ctext3), |
605 | }, { |
606 | .klen = 24, |
607 | .ctext = ctext4, |
608 | .clen = sizeof(ctext4), |
609 | }, { |
610 | .klen = 24, |
611 | .ptext = ptext1, |
612 | .plen = sizeof(ptext1), |
613 | .ctext = ctext5, |
614 | .clen = sizeof(ctext5), |
615 | }, { |
616 | .key = "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
617 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" |
618 | "\xfe\xff\xe9\x92\x86\x65\x73\x1c" , |
619 | .klen = 24, |
620 | .iv = "\xca\xfe\xba\xbe\xfa\xce\xdb\xad" |
621 | "\xde\xca\xf8\x88" , |
622 | .ptext = ptext6, |
623 | .plen = sizeof(ptext6), |
624 | .ctext = ctext6, |
625 | .clen = sizeof(ctext6), |
626 | }, { |
627 | .klen = 32, |
628 | .ctext = ctext7, |
629 | .clen = sizeof(ctext7), |
630 | }, { |
631 | .klen = 32, |
632 | .ptext = ptext1, |
633 | .plen = sizeof(ptext1), |
634 | .ctext = ctext8, |
635 | .clen = sizeof(ctext8), |
636 | }, { |
637 | .key = "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
638 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" |
639 | "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
640 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" , |
641 | .klen = 32, |
642 | .iv = "\xca\xfe\xba\xbe\xfa\xce\xdb\xad" |
643 | "\xde\xca\xf8\x88" , |
644 | .ptext = ptext9, |
645 | .plen = sizeof(ptext9), |
646 | .ctext = ctext9, |
647 | .clen = sizeof(ctext9), |
648 | }, { |
649 | .key = "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
650 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" |
651 | "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
652 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" , |
653 | .klen = 32, |
654 | .iv = "\xca\xfe\xba\xbe\xfa\xce\xdb\xad" |
655 | "\xde\xca\xf8\x88" , |
656 | .ptext = ptext10, |
657 | .plen = sizeof(ptext10), |
658 | .assoc = "\xfe\xed\xfa\xce\xde\xad\xbe\xef" |
659 | "\xfe\xed\xfa\xce\xde\xad\xbe\xef" |
660 | "\xab\xad\xda\xd2" , |
661 | .alen = 20, |
662 | .ctext = ctext10, |
663 | .clen = sizeof(ctext10), |
664 | }, { |
665 | .key = "\xfe\xff\xe9\x92\x86\x65\x73\x1c" |
666 | "\x6d\x6a\x8f\x94\x67\x30\x83\x08" |
667 | "\xfe\xff\xe9\x92\x86\x65\x73\x1c" , |
668 | .klen = 24, |
669 | .iv = "\xca\xfe\xba\xbe\xfa\xce\xdb\xad" |
670 | "\xde\xca\xf8\x88" , |
671 | .ptext = ptext11, |
672 | .plen = sizeof(ptext11), |
673 | .assoc = "\xfe\xed\xfa\xce\xde\xad\xbe\xef" |
674 | "\xfe\xed\xfa\xce\xde\xad\xbe\xef" |
675 | "\xab\xad\xda\xd2" , |
676 | .alen = 20, |
677 | .ctext = ctext11, |
678 | .clen = sizeof(ctext11), |
679 | }, { |
680 | .key = "\x62\x35\xf8\x95\xfc\xa5\xeb\xf6" |
681 | "\x0e\x92\x12\x04\xd3\xa1\x3f\x2e" |
682 | "\x8b\x32\xcf\xe7\x44\xed\x13\x59" |
683 | "\x04\x38\x77\xb0\xb9\xad\xb4\x38" , |
684 | .klen = 32, |
685 | .iv = "\x00\xff\xff\xff\xff\x00\x00\xff" |
686 | "\xff\xff\x00\xff" , |
687 | .ptext = ptext12, |
688 | .plen = sizeof(ptext12), |
689 | .ctext = ctext12, |
690 | .clen = sizeof(ctext12), |
691 | } |
692 | }; |
693 | |
694 | static int __init libaesgcm_init(void) |
695 | { |
696 | for (int i = 0; i < ARRAY_SIZE(aesgcm_tv); i++) { |
697 | u8 tagbuf[AES_BLOCK_SIZE]; |
698 | int plen = aesgcm_tv[i].plen; |
699 | struct aesgcm_ctx ctx; |
700 | u8 buf[sizeof(ptext12)]; |
701 | |
702 | if (aesgcm_expandkey(&ctx, aesgcm_tv[i].key, aesgcm_tv[i].klen, |
703 | aesgcm_tv[i].clen - plen)) { |
704 | pr_err("aesgcm_expandkey() failed on vector %d\n" , i); |
705 | return -ENODEV; |
706 | } |
707 | |
708 | if (!aesgcm_decrypt(&ctx, buf, aesgcm_tv[i].ctext, plen, |
709 | aesgcm_tv[i].assoc, aesgcm_tv[i].alen, |
710 | aesgcm_tv[i].iv, aesgcm_tv[i].ctext + plen) |
711 | || memcmp(buf, aesgcm_tv[i].ptext, plen)) { |
712 | pr_err("aesgcm_decrypt() #1 failed on vector %d\n" , i); |
713 | return -ENODEV; |
714 | } |
715 | |
716 | /* encrypt in place */ |
717 | aesgcm_encrypt(&ctx, buf, buf, plen, aesgcm_tv[i].assoc, |
718 | aesgcm_tv[i].alen, aesgcm_tv[i].iv, tagbuf); |
719 | if (memcmp(buf, aesgcm_tv[i].ctext, plen)) { |
720 | pr_err("aesgcm_encrypt() failed on vector %d\n" , i); |
721 | return -ENODEV; |
722 | } |
723 | |
724 | /* decrypt in place */ |
725 | if (!aesgcm_decrypt(&ctx, buf, buf, plen, aesgcm_tv[i].assoc, |
726 | aesgcm_tv[i].alen, aesgcm_tv[i].iv, tagbuf) |
727 | || memcmp(buf, aesgcm_tv[i].ptext, plen)) { |
728 | pr_err("aesgcm_decrypt() #2 failed on vector %d\n" , i); |
729 | return -ENODEV; |
730 | } |
731 | } |
732 | return 0; |
733 | } |
734 | module_init(libaesgcm_init); |
735 | |
736 | static void __exit libaesgcm_exit(void) |
737 | { |
738 | } |
739 | module_exit(libaesgcm_exit); |
740 | #endif |
741 | |