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      1 /*
      2  * Copyright 2021 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 CAMELLIA CBC CTS ciphers */
     11 
     12 #include <openssl/proverr.h>
     13 #include "cipher_cts.h"
     14 
     15 #define CTS_FLAGS PROV_CIPHER_FLAG_CTS
     16 
     17 static OSSL_FUNC_cipher_encrypt_init_fn camellia_cbc_cts_einit;
     18 static OSSL_FUNC_cipher_decrypt_init_fn camellia_cbc_cts_dinit;
     19 static OSSL_FUNC_cipher_get_ctx_params_fn camellia_cbc_cts_get_ctx_params;
     20 static OSSL_FUNC_cipher_set_ctx_params_fn camellia_cbc_cts_set_ctx_params;
     21 static OSSL_FUNC_cipher_gettable_ctx_params_fn camellia_cbc_cts_gettable_ctx_params;
     22 static OSSL_FUNC_cipher_settable_ctx_params_fn camellia_cbc_cts_settable_ctx_params;
     23 
     24 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(camellia_cbc_cts)
     25 OSSL_PARAM_utf8_string(OSSL_CIPHER_PARAM_CTS_MODE, NULL, 0),
     26 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(camellia_cbc_cts)
     27 
     28 static int camellia_cbc_cts_einit(void *ctx, const unsigned char *key, size_t keylen,
     29                              const unsigned char *iv, size_t ivlen,
     30                              const OSSL_PARAM params[])
     31 {
     32     if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL))
     33         return 0;
     34     return camellia_cbc_cts_set_ctx_params(ctx, params);
     35 }
     36 
     37 static int camellia_cbc_cts_dinit(void *ctx, const unsigned char *key, size_t keylen,
     38                              const unsigned char *iv, size_t ivlen,
     39                              const OSSL_PARAM params[])
     40 {
     41     if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL))
     42         return 0;
     43     return camellia_cbc_cts_set_ctx_params(ctx, params);
     44 }
     45 
     46 static int camellia_cbc_cts_get_ctx_params(void *vctx, OSSL_PARAM params[])
     47 {
     48     PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
     49     OSSL_PARAM *p;
     50 
     51     p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_CTS_MODE);
     52     if (p != NULL) {
     53         const char *name = ossl_cipher_cbc_cts_mode_id2name(ctx->cts_mode);
     54 
     55         if (name == NULL || !OSSL_PARAM_set_utf8_string(p, name)) {
     56             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
     57             return 0;
     58         }
     59     }
     60     return ossl_cipher_generic_get_ctx_params(vctx, params);
     61 }
     62 
     63 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(camellia_cbc_cts)
     64 OSSL_PARAM_utf8_string(OSSL_CIPHER_PARAM_CTS_MODE, NULL, 0),
     65 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(camellia_cbc_cts)
     66 
     67 static int camellia_cbc_cts_set_ctx_params(void *vctx, const OSSL_PARAM params[])
     68 {
     69     PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
     70     const OSSL_PARAM *p;
     71     int id;
     72 
     73     p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_CTS_MODE);
     74     if (p != NULL) {
     75         if (p->data_type != OSSL_PARAM_UTF8_STRING)
     76             goto err;
     77         id = ossl_cipher_cbc_cts_mode_name2id(p->data);
     78         if (id < 0)
     79             goto err;
     80 
     81         ctx->cts_mode = (unsigned int)id;
     82     }
     83     return ossl_cipher_generic_set_ctx_params(vctx, params);
     84 err:
     85     ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
     86     return 0;
     87 }
     88 
     89 /* ossl_camellia256cbc_cts_functions */
     90 IMPLEMENT_cts_cipher(camellia, CAMELLIA, cbc, CBC, CTS_FLAGS, 256, 128, 128, block)
     91 /* ossl_camellia192cbc_cts_functions */
     92 IMPLEMENT_cts_cipher(camellia, CAMELLIA, cbc, CBC, CTS_FLAGS, 192, 128, 128, block)
     93 /* ossl_camellia128cbc_cts_functions */
     94 IMPLEMENT_cts_cipher(camellia, CAMELLIA, cbc, CBC, CTS_FLAGS, 128, 128, 128, block)
     95