1 /* 2 * Copyright 2019-2021 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 RC5 cipher modes ecb, cbc, ofb, cfb */ 11 12 /* 13 * RC5 low level APIs are deprecated for public use, but still ok for internal 14 * use. 15 */ 16 #include "internal/deprecated.h" 17 18 #include <openssl/proverr.h> 19 #include "cipher_rc5.h" 20 #include "prov/implementations.h" 21 #include "prov/providercommon.h" 22 23 #define RC5_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH 24 25 static OSSL_FUNC_cipher_encrypt_init_fn rc5_einit; 26 static OSSL_FUNC_cipher_decrypt_init_fn rc5_dinit; 27 static OSSL_FUNC_cipher_freectx_fn rc5_freectx; 28 static OSSL_FUNC_cipher_dupctx_fn rc5_dupctx; 29 OSSL_FUNC_cipher_gettable_ctx_params_fn rc5_gettable_ctx_params; 30 OSSL_FUNC_cipher_settable_ctx_params_fn rc5_settable_ctx_params; 31 static OSSL_FUNC_cipher_set_ctx_params_fn rc5_set_ctx_params; 32 33 static void rc5_freectx(void *vctx) 34 { 35 PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx; 36 37 ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx); 38 OPENSSL_clear_free(ctx, sizeof(*ctx)); 39 } 40 41 static void *rc5_dupctx(void *ctx) 42 { 43 PROV_RC5_CTX *in = (PROV_RC5_CTX *)ctx; 44 PROV_RC5_CTX *ret; 45 46 if (!ossl_prov_is_running()) 47 return NULL; 48 49 ret = OPENSSL_malloc(sizeof(*ret)); 50 if (ret == NULL) { 51 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); 52 return NULL; 53 } 54 *ret = *in; 55 56 return ret; 57 } 58 59 static int rc5_einit(void *ctx, const unsigned char *key, size_t keylen, 60 const unsigned char *iv, size_t ivlen, 61 const OSSL_PARAM params[]) 62 { 63 if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL)) 64 return 0; 65 return rc5_set_ctx_params(ctx, params); 66 } 67 68 static int rc5_dinit(void *ctx, const unsigned char *key, size_t keylen, 69 const unsigned char *iv, size_t ivlen, 70 const OSSL_PARAM params[]) 71 { 72 if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL)) 73 return 0; 74 return rc5_set_ctx_params(ctx, params); 75 } 76 77 static int rc5_set_ctx_params(void *vctx, const OSSL_PARAM params[]) 78 { 79 PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx; 80 const OSSL_PARAM *p; 81 82 if (params == NULL) 83 return 1; 84 85 if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params)) 86 return 0; 87 88 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ROUNDS); 89 if (p != NULL) { 90 unsigned int rounds; 91 92 if (!OSSL_PARAM_get_uint(p, &rounds)) { 93 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER); 94 return 0; 95 } 96 if (rounds != RC5_8_ROUNDS 97 && rounds != RC5_12_ROUNDS 98 && rounds != RC5_16_ROUNDS) { 99 ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_NUMBER_OF_ROUNDS); 100 return 0; 101 } 102 ctx->rounds = rounds; 103 } 104 return 1; 105 } 106 107 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc5) 108 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL), 109 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc5) 110 111 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc5) 112 OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL), 113 OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL), 114 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc5) 115 116 117 static int rc5_get_ctx_params(void *vctx, OSSL_PARAM params[]) 118 { 119 PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx; 120 OSSL_PARAM *p; 121 122 if (!ossl_cipher_generic_get_ctx_params(vctx, params)) 123 return 0; 124 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ROUNDS); 125 if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->rounds)) { 126 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); 127 return 0; 128 } 129 return 1; 130 } 131 132 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, \ 133 blkbits, ivbits, typ) \ 134 static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \ 135 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \ 136 { \ 137 return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \ 138 flags, kbits, blkbits, ivbits); \ 139 } \ 140 static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \ 141 static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \ 142 { \ 143 PROV_##UCALG##_CTX *ctx; \ 144 if (!ossl_prov_is_running()) \ 145 return NULL; \ 146 ctx = OPENSSL_zalloc(sizeof(*ctx)); \ 147 if (ctx != NULL) { \ 148 ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \ 149 EVP_CIPH_##UCMODE##_MODE, flags, \ 150 ossl_prov_cipher_hw_##alg##_##lcmode(kbits),\ 151 NULL); \ 152 ctx->rounds = RC5_12_ROUNDS; \ 153 } \ 154 return ctx; \ 155 } \ 156 const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \ 157 { OSSL_FUNC_CIPHER_NEWCTX, \ 158 (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \ 159 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \ 160 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \ 161 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc5_einit }, \ 162 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc5_dinit }, \ 163 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\ 164 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \ 165 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \ 166 { OSSL_FUNC_CIPHER_GET_PARAMS, \ 167 (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \ 168 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \ 169 (void (*)(void))ossl_cipher_generic_gettable_params }, \ 170 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \ 171 (void (*)(void))rc5_get_ctx_params }, \ 172 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \ 173 (void (*)(void))rc5_gettable_ctx_params }, \ 174 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \ 175 (void (*)(void))rc5_set_ctx_params }, \ 176 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \ 177 (void (*)(void))rc5_settable_ctx_params }, \ 178 { 0, NULL } \ 179 }; 180 181 /* ossl_rc5128ecb_functions */ 182 IMPLEMENT_cipher(rc5, RC5, ecb, ECB, RC5_FLAGS, 128, 64, 0, block) 183 /* ossl_rc5128cbc_functions */ 184 IMPLEMENT_cipher(rc5, RC5, cbc, CBC, RC5_FLAGS, 128, 64, 64, block) 185 /* ossl_rc5128ofb64_functions */ 186 IMPLEMENT_cipher(rc5, RC5, ofb64, OFB, RC5_FLAGS, 128, 8, 64, stream) 187 /* ossl_rc5128cfb64_functions */ 188 IMPLEMENT_cipher(rc5, RC5, cfb64, CFB, RC5_FLAGS, 128, 8, 64, stream) 189
Indexes created Tue Mar 03 05:31:39 UTC 2026