2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include <openssl/crypto.h>
12 #include <openssl/core_numbers.h>
13 #include <openssl/core_names.h>
14 #include <openssl/evp.h>
15 #include <openssl/params.h>
16 #include "internal/cryptlib.h"
17 #include "internal/provider_algs.h"
18 #include "ciphers_locl.h"
20 static void PROV_AES_KEY_generic_init(PROV_AES_KEY *ctx,
21 const unsigned char *iv,
25 memcpy(ctx->iv, iv, AES_BLOCK_SIZE);
29 static int aes_einit(void *vctx, const unsigned char *key,
30 const unsigned char *iv)
32 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
34 PROV_AES_KEY_generic_init(ctx, iv, 1);
36 return ctx->ciph->init(ctx, key, ctx->keylen);
41 static int aes_dinit(void *vctx, const unsigned char *key,
42 const unsigned char *iv)
44 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
46 PROV_AES_KEY_generic_init(ctx, iv, 0);
48 return ctx->ciph->init(ctx, key, ctx->keylen);
53 static int aes_block_update(void *vctx, unsigned char *out, size_t *outl,
54 const unsigned char *in, size_t inl)
56 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
57 size_t nextblocks = fillblock(ctx->buf, &ctx->bufsz, AES_BLOCK_SIZE, &in,
62 * If we're decrypting and we end an update on a block boundary we hold
63 * the last block back in case this is the last update call and the last
66 if (ctx->bufsz == AES_BLOCK_SIZE
67 && (ctx->enc || inl > 0 || !ctx->pad)) {
68 if (!ctx->ciph->cipher(ctx, out, ctx->buf, AES_BLOCK_SIZE))
71 outlint = AES_BLOCK_SIZE;
72 out += AES_BLOCK_SIZE;
75 if (!ctx->enc && ctx->pad && nextblocks == inl) {
76 if (!ossl_assert(inl >= AES_BLOCK_SIZE))
78 nextblocks -= AES_BLOCK_SIZE;
80 if (!ctx->ciph->cipher(ctx, out, in, nextblocks))
84 outlint += nextblocks;
86 if (!trailingdata(ctx->buf, &ctx->bufsz, AES_BLOCK_SIZE, &in, &inl))
93 static int aes_block_final(void *vctx, unsigned char *out, size_t *outl)
95 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
99 padblock(ctx->buf, &ctx->bufsz, AES_BLOCK_SIZE);
100 } else if (ctx->bufsz == 0) {
103 } else if (ctx->bufsz != AES_BLOCK_SIZE) {
104 /* TODO(3.0): What is the correct error code here? */
108 if (!ctx->ciph->cipher(ctx, out, ctx->buf, AES_BLOCK_SIZE))
111 *outl = AES_BLOCK_SIZE;
116 /* TODO(3.0): What's the correct error here */
117 if (ctx->bufsz != AES_BLOCK_SIZE) {
118 if (ctx->bufsz == 0 && !ctx->pad) {
125 if (!ctx->ciph->cipher(ctx, ctx->buf, ctx->buf, AES_BLOCK_SIZE))
128 /* TODO(3.0): What is the correct error here */
129 if (ctx->pad && !unpadblock(ctx->buf, &ctx->bufsz, AES_BLOCK_SIZE))
132 memcpy(out, ctx->buf, ctx->bufsz);
138 static int aes_stream_update(void *vctx, unsigned char *out, size_t *outl,
139 const unsigned char *in, size_t inl)
141 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
143 if (!ctx->ciph->cipher(ctx, out, in, inl))
149 static int aes_stream_final(void *vctx, unsigned char *out, size_t *outl)
155 static int aes_cipher(void *vctx, unsigned char *out, const unsigned char *in,
158 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
160 if (!ctx->ciph->cipher(ctx, out, in, inl))
166 #define IMPLEMENT_new_params(lcmode, UCMODE) \
167 static int aes_##lcmode##_get_params(const OSSL_PARAM params[]) \
169 const OSSL_PARAM *p; \
171 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_MODE); \
172 if (p != NULL && !OSSL_PARAM_set_int(p, EVP_CIPH_##UCMODE##_MODE)) \
178 #define IMPLEMENT_new_ctx(lcmode, UCMODE, len) \
179 static void *aes_##len##_##lcmode##_newctx(void) \
181 PROV_AES_KEY *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
184 ctx->keylen = (len / 8); \
185 ctx->ciph = PROV_AES_CIPHER_##lcmode(); \
186 ctx->mode = EVP_CIPH_##UCMODE##_MODE; \
191 IMPLEMENT_new_params(ecb, ECB)
192 IMPLEMENT_new_ctx(ecb, ECB, 256)
193 IMPLEMENT_new_ctx(ecb, ECB, 192)
194 IMPLEMENT_new_ctx(ecb, ECB, 128)
197 IMPLEMENT_new_params(cbc, CBC)
198 IMPLEMENT_new_ctx(cbc, CBC, 256)
199 IMPLEMENT_new_ctx(cbc, CBC, 192)
200 IMPLEMENT_new_ctx(cbc, CBC, 128)
203 IMPLEMENT_new_params(ofb, OFB)
204 IMPLEMENT_new_ctx(ofb, OFB, 256)
205 IMPLEMENT_new_ctx(ofb, OFB, 192)
206 IMPLEMENT_new_ctx(ofb, OFB, 128)
209 IMPLEMENT_new_params(cfb, CFB)
210 IMPLEMENT_new_params(cfb1, CFB)
211 IMPLEMENT_new_params(cfb8, CFB)
212 IMPLEMENT_new_ctx(cfb, CFB, 256)
213 IMPLEMENT_new_ctx(cfb, CFB, 192)
214 IMPLEMENT_new_ctx(cfb, CFB, 128)
215 IMPLEMENT_new_ctx(cfb1, CFB, 256)
216 IMPLEMENT_new_ctx(cfb1, CFB, 192)
217 IMPLEMENT_new_ctx(cfb1, CFB, 128)
218 IMPLEMENT_new_ctx(cfb8, CFB, 256)
219 IMPLEMENT_new_ctx(cfb8, CFB, 192)
220 IMPLEMENT_new_ctx(cfb8, CFB, 128)
223 IMPLEMENT_new_params(ctr, CTR)
224 IMPLEMENT_new_ctx(ctr, CTR, 256)
225 IMPLEMENT_new_ctx(ctr, CTR, 192)
226 IMPLEMENT_new_ctx(ctr, CTR, 128)
228 static void aes_freectx(void *vctx)
230 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
232 OPENSSL_clear_free(ctx, sizeof(*ctx));
235 static void *aes_dupctx(void *ctx)
237 PROV_AES_KEY *in = (PROV_AES_KEY *)ctx;
238 PROV_AES_KEY *ret = OPENSSL_malloc(sizeof(*ret));
245 static size_t key_length_256(void)
250 static size_t key_length_192(void)
255 static size_t key_length_128(void)
260 static size_t iv_length_16(void)
265 static size_t iv_length_0(void)
270 static size_t block_size_16(void)
275 static size_t block_size_1(void)
280 static int aes_ctx_get_params(void *vctx, const OSSL_PARAM params[])
282 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
285 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_PADDING);
286 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->pad))
292 static int aes_ctx_set_params(void *vctx, const OSSL_PARAM params[])
294 PROV_AES_KEY *ctx = (PROV_AES_KEY *)vctx;
297 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_PADDING);
301 if (!OSSL_PARAM_get_int(p, &pad))
303 ctx->pad = pad ? 1 : 0;
308 #define IMPLEMENT_block_funcs(mode, keylen, ivlen) \
309 const OSSL_DISPATCH aes##keylen##mode##_functions[] = { \
310 { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))aes_##keylen##_##mode##_newctx }, \
311 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))aes_einit }, \
312 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))aes_dinit }, \
313 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))aes_block_update }, \
314 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))aes_block_final }, \
315 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))aes_cipher }, \
316 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))aes_freectx }, \
317 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))aes_dupctx }, \
318 { OSSL_FUNC_CIPHER_KEY_LENGTH, (void (*)(void))key_length_##keylen }, \
319 { OSSL_FUNC_CIPHER_IV_LENGTH, (void (*)(void))iv_length_##ivlen }, \
320 { OSSL_FUNC_CIPHER_BLOCK_SIZE, (void (*)(void))block_size_16 }, \
321 { OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))aes_##mode##_get_params }, \
322 { OSSL_FUNC_CIPHER_CTX_GET_PARAMS, (void (*)(void))aes_ctx_get_params }, \
323 { OSSL_FUNC_CIPHER_CTX_SET_PARAMS, (void (*)(void))aes_ctx_set_params }, \
327 #define IMPLEMENT_stream_funcs(mode, keylen, ivlen) \
328 const OSSL_DISPATCH aes##keylen##mode##_functions[] = { \
329 { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))aes_##keylen##_##mode##_newctx }, \
330 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))aes_einit }, \
331 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))aes_dinit }, \
332 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))aes_stream_update }, \
333 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))aes_stream_final }, \
334 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))aes_cipher }, \
335 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))aes_freectx }, \
336 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))aes_dupctx }, \
337 { OSSL_FUNC_CIPHER_KEY_LENGTH, (void (*)(void))key_length_##keylen }, \
338 { OSSL_FUNC_CIPHER_IV_LENGTH, (void (*)(void))iv_length_##ivlen }, \
339 { OSSL_FUNC_CIPHER_BLOCK_SIZE, (void (*)(void))block_size_1 }, \
340 { OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))aes_##mode##_get_params }, \
341 { OSSL_FUNC_CIPHER_CTX_GET_PARAMS, (void (*)(void))aes_ctx_get_params }, \
342 { OSSL_FUNC_CIPHER_CTX_SET_PARAMS, (void (*)(void))aes_ctx_set_params }, \
347 IMPLEMENT_block_funcs(ecb, 256, 0)
348 IMPLEMENT_block_funcs(ecb, 192, 0)
349 IMPLEMENT_block_funcs(ecb, 128, 0)
352 IMPLEMENT_block_funcs(cbc, 256, 16)
353 IMPLEMENT_block_funcs(cbc, 192, 16)
354 IMPLEMENT_block_funcs(cbc, 128, 16)
357 IMPLEMENT_stream_funcs(ofb, 256, 16)
358 IMPLEMENT_stream_funcs(ofb, 192, 16)
359 IMPLEMENT_stream_funcs(ofb, 128, 16)
362 IMPLEMENT_stream_funcs(cfb, 256, 16)
363 IMPLEMENT_stream_funcs(cfb, 192, 16)
364 IMPLEMENT_stream_funcs(cfb, 128, 16)
365 IMPLEMENT_stream_funcs(cfb1, 256, 16)
366 IMPLEMENT_stream_funcs(cfb1, 192, 16)
367 IMPLEMENT_stream_funcs(cfb1, 128, 16)
368 IMPLEMENT_stream_funcs(cfb8, 256, 16)
369 IMPLEMENT_stream_funcs(cfb8, 192, 16)
370 IMPLEMENT_stream_funcs(cfb8, 128, 16)
373 IMPLEMENT_stream_funcs(ctr, 256, 16)
374 IMPLEMENT_stream_funcs(ctr, 192, 16)
375 IMPLEMENT_stream_funcs(ctr, 128, 16)