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source: vbox/trunk/src/libs/openssl-3.1.5/providers/implementations/ciphers/cipher_chacha20_poly1305.c@ 104125

最後變更 在這個檔案從104125是 104078,由 vboxsync 提交於 12 月 前

openssl-3.1.5: Applied and adjusted our OpenSSL changes to 3.1.4. bugref:10638
檔案大小: 12.5 KB
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1/*
2 * Copyright 2019-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/* Dispatch functions for chacha20_poly1305 cipher */
11
12#include <openssl/proverr.h>
13#include "cipher_chacha20_poly1305.h"
14#include "prov/implementations.h"
15#include "prov/providercommon.h"
16
17#define CHACHA20_POLY1305_KEYLEN CHACHA_KEY_SIZE
18#define CHACHA20_POLY1305_BLKLEN 1
19#define CHACHA20_POLY1305_MAX_IVLEN 12
20#define CHACHA20_POLY1305_MODE 0
21#define CHACHA20_POLY1305_FLAGS (PROV_CIPHER_FLAG_AEAD \
22 | PROV_CIPHER_FLAG_CUSTOM_IV)
23
24static OSSL_FUNC_cipher_newctx_fn chacha20_poly1305_newctx;
25static OSSL_FUNC_cipher_freectx_fn chacha20_poly1305_freectx;
26static OSSL_FUNC_cipher_dupctx_fn chacha20_poly1305_dupctx;
27static OSSL_FUNC_cipher_encrypt_init_fn chacha20_poly1305_einit;
28static OSSL_FUNC_cipher_decrypt_init_fn chacha20_poly1305_dinit;
29static OSSL_FUNC_cipher_get_params_fn chacha20_poly1305_get_params;
30static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_poly1305_get_ctx_params;
31static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_poly1305_set_ctx_params;
32static OSSL_FUNC_cipher_cipher_fn chacha20_poly1305_cipher;
33static OSSL_FUNC_cipher_final_fn chacha20_poly1305_final;
34static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_poly1305_gettable_ctx_params;
35#define chacha20_poly1305_settable_ctx_params ossl_cipher_aead_settable_ctx_params
36#define chacha20_poly1305_gettable_params ossl_cipher_generic_gettable_params
37#define chacha20_poly1305_update chacha20_poly1305_cipher
38
39static void *chacha20_poly1305_newctx(void *provctx)
40{
41 PROV_CHACHA20_POLY1305_CTX *ctx;
42
43 if (!ossl_prov_is_running())
44 return NULL;
45
46 ctx = OPENSSL_zalloc(sizeof(*ctx));
47 if (ctx != NULL) {
48 ossl_cipher_generic_initkey(&ctx->base, CHACHA20_POLY1305_KEYLEN * 8,
49 CHACHA20_POLY1305_BLKLEN * 8,
50 CHACHA20_POLY1305_IVLEN * 8,
51 CHACHA20_POLY1305_MODE,
52 CHACHA20_POLY1305_FLAGS,
53 ossl_prov_cipher_hw_chacha20_poly1305(
54 CHACHA20_POLY1305_KEYLEN * 8),
55 NULL);
56 ctx->tls_payload_length = NO_TLS_PAYLOAD_LENGTH;
57 ossl_chacha20_initctx(&ctx->chacha);
58 }
59 return ctx;
60}
61
62static void *chacha20_poly1305_dupctx(void *provctx)
63{
64 PROV_CHACHA20_POLY1305_CTX *ctx = provctx;
65 PROV_CHACHA20_POLY1305_CTX *dctx = NULL;
66
67 if (ctx == NULL)
68 return NULL;
69 dctx = OPENSSL_memdup(ctx, sizeof(*ctx));
70 if (dctx != NULL && dctx->base.tlsmac != NULL && dctx->base.alloced) {
71 dctx->base.tlsmac = OPENSSL_memdup(dctx->base.tlsmac,
72 dctx->base.tlsmacsize);
73 if (dctx->base.tlsmac == NULL) {
74 OPENSSL_free(dctx);
75 dctx = NULL;
76 }
77 }
78 return dctx;
79}
80
81static void chacha20_poly1305_freectx(void *vctx)
82{
83 PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;
84
85 if (ctx != NULL) {
86 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
87 OPENSSL_clear_free(ctx, sizeof(*ctx));
88 }
89}
90
91static int chacha20_poly1305_get_params(OSSL_PARAM params[])
92{
93 return ossl_cipher_generic_get_params(params, 0, CHACHA20_POLY1305_FLAGS,
94 CHACHA20_POLY1305_KEYLEN * 8,
95 CHACHA20_POLY1305_BLKLEN * 8,
96 CHACHA20_POLY1305_IVLEN * 8);
97}
98
99static int chacha20_poly1305_get_ctx_params(void *vctx, OSSL_PARAM params[])
100{
101 PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;
102 OSSL_PARAM *p;
103
104 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
105 if (p != NULL) {
106 if (!OSSL_PARAM_set_size_t(p, CHACHA20_POLY1305_IVLEN)) {
107 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
108 return 0;
109 }
110 }
111 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
112 if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_POLY1305_KEYLEN)) {
113 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
114 return 0;
115 }
116 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAGLEN);
117 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->tag_len)) {
118 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
119 return 0;
120 }
121 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD);
122 if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->tls_aad_pad_sz)) {
123 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
124 return 0;
125 }
126
127 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAG);
128 if (p != NULL) {
129 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
130 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
131 return 0;
132 }
133 if (!ctx->base.enc) {
134 ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_SET);
135 return 0;
136 }
137 if (p->data_size == 0 || p->data_size > POLY1305_BLOCK_SIZE) {
138 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAG_LENGTH);
139 return 0;
140 }
141 memcpy(p->data, ctx->tag, p->data_size);
142 }
143
144 return 1;
145}
146
147static const OSSL_PARAM chacha20_poly1305_known_gettable_ctx_params[] = {
148 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
149 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
150 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
151 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
152 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, NULL),
153 OSSL_PARAM_END
154};
155static const OSSL_PARAM *chacha20_poly1305_gettable_ctx_params
156 (ossl_unused void *cctx, ossl_unused void *provctx)
157{
158 return chacha20_poly1305_known_gettable_ctx_params;
159}
160
161static int chacha20_poly1305_set_ctx_params(void *vctx,
162 const OSSL_PARAM params[])
163{
164 const OSSL_PARAM *p;
165 size_t len;
166 PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;
167 PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
168 (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->base.hw;
169
170 if (params == NULL)
171 return 1;
172
173 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
174 if (p != NULL) {
175 if (!OSSL_PARAM_get_size_t(p, &len)) {
176 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
177 return 0;
178 }
179 if (len != CHACHA20_POLY1305_KEYLEN) {
180 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
181 return 0;
182 }
183 }
184 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
185 if (p != NULL) {
186 if (!OSSL_PARAM_get_size_t(p, &len)) {
187 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
188 return 0;
189 }
190 if (len != CHACHA20_POLY1305_MAX_IVLEN) {
191 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
192 return 0;
193 }
194 }
195
196 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TAG);
197 if (p != NULL) {
198 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
199 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
200 return 0;
201 }
202 if (p->data_size == 0 || p->data_size > POLY1305_BLOCK_SIZE) {
203 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAG_LENGTH);
204 return 0;
205 }
206 if (p->data != NULL) {
207 if (ctx->base.enc) {
208 ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_NEEDED);
209 return 0;
210 }
211 memcpy(ctx->tag, p->data, p->data_size);
212 }
213 ctx->tag_len = p->data_size;
214 }
215
216 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TLS1_AAD);
217 if (p != NULL) {
218 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
219 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
220 return 0;
221 }
222 len = hw->tls_init(&ctx->base, p->data, p->data_size);
223 if (len == 0) {
224 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DATA);
225 return 0;
226 }
227 ctx->tls_aad_pad_sz = len;
228 }
229
230 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED);
231 if (p != NULL) {
232 if (p->data_type != OSSL_PARAM_OCTET_STRING) {
233 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
234 return 0;
235 }
236 if (hw->tls_iv_set_fixed(&ctx->base, p->data, p->data_size) == 0) {
237 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
238 return 0;
239 }
240 }
241 /* ignore OSSL_CIPHER_PARAM_AEAD_MAC_KEY */
242 return 1;
243}
244
245static int chacha20_poly1305_einit(void *vctx, const unsigned char *key,
246 size_t keylen, const unsigned char *iv,
247 size_t ivlen, const OSSL_PARAM params[])
248{
249 int ret;
250
251 /* The generic function checks for ossl_prov_is_running() */
252 ret = ossl_cipher_generic_einit(vctx, key, keylen, iv, ivlen, NULL);
253 if (ret && iv != NULL) {
254 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
255 PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
256 (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
257
258 hw->initiv(ctx);
259 }
260 if (ret && !chacha20_poly1305_set_ctx_params(vctx, params))
261 ret = 0;
262 return ret;
263}
264
265static int chacha20_poly1305_dinit(void *vctx, const unsigned char *key,
266 size_t keylen, const unsigned char *iv,
267 size_t ivlen, const OSSL_PARAM params[])
268{
269 int ret;
270
271 /* The generic function checks for ossl_prov_is_running() */
272 ret = ossl_cipher_generic_dinit(vctx, key, keylen, iv, ivlen, NULL);
273 if (ret && iv != NULL) {
274 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
275 PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
276 (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
277
278 hw->initiv(ctx);
279 }
280 if (ret && !chacha20_poly1305_set_ctx_params(vctx, params))
281 ret = 0;
282 return ret;
283}
284
285static int chacha20_poly1305_cipher(void *vctx, unsigned char *out,
286 size_t *outl, size_t outsize,
287 const unsigned char *in, size_t inl)
288{
289 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
290 PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
291 (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
292
293 if (!ossl_prov_is_running())
294 return 0;
295
296 if (inl == 0) {
297 *outl = 0;
298 return 1;
299 }
300
301 if (outsize < inl) {
302 ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
303 return 0;
304 }
305
306 if (!hw->aead_cipher(ctx, out, outl, in, inl))
307 return 0;
308
309 return 1;
310}
311
312static int chacha20_poly1305_final(void *vctx, unsigned char *out, size_t *outl,
313 size_t outsize)
314{
315 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
316 PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
317 (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
318
319 if (!ossl_prov_is_running())
320 return 0;
321
322 if (hw->aead_cipher(ctx, out, outl, NULL, 0) <= 0)
323 return 0;
324
325 *outl = 0;
326 return 1;
327}
328
329/* ossl_chacha20_ossl_poly1305_functions */
330const OSSL_DISPATCH ossl_chacha20_ossl_poly1305_functions[] = {
331 { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_poly1305_newctx },
332 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_poly1305_freectx },
333 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))chacha20_poly1305_dupctx },
334 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))chacha20_poly1305_einit },
335 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))chacha20_poly1305_dinit },
336 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_poly1305_update },
337 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_poly1305_final },
338 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_poly1305_cipher },
339 { OSSL_FUNC_CIPHER_GET_PARAMS,
340 (void (*)(void))chacha20_poly1305_get_params },
341 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,
342 (void (*)(void))chacha20_poly1305_gettable_params },
343 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS,
344 (void (*)(void))chacha20_poly1305_get_ctx_params },
345 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
346 (void (*)(void))chacha20_poly1305_gettable_ctx_params },
347 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,
348 (void (*)(void))chacha20_poly1305_set_ctx_params },
349 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
350 (void (*)(void))chacha20_poly1305_settable_ctx_params },
351 { 0, NULL }
352};
353
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