| 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 RC4 ciphers */
|
|---|
| 11 |
|
|---|
| 12 | /*
|
|---|
| 13 | * RC4 low level APIs are deprecated for public use, but still ok for internal
|
|---|
| 14 | * use.
|
|---|
| 15 | */
|
|---|
| 16 | #include "internal/deprecated.h"
|
|---|
| 17 |
|
|---|
| 18 | #include "cipher_rc4.h"
|
|---|
| 19 | #include "prov/implementations.h"
|
|---|
| 20 | #include "prov/providercommon.h"
|
|---|
| 21 |
|
|---|
| 22 | #define RC4_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH
|
|---|
| 23 |
|
|---|
| 24 | static OSSL_FUNC_cipher_encrypt_init_fn rc4_einit;
|
|---|
| 25 | static OSSL_FUNC_cipher_decrypt_init_fn rc4_dinit;
|
|---|
| 26 | static OSSL_FUNC_cipher_freectx_fn rc4_freectx;
|
|---|
| 27 | static OSSL_FUNC_cipher_dupctx_fn rc4_dupctx;
|
|---|
| 28 |
|
|---|
| 29 | static void rc4_freectx(void *vctx)
|
|---|
| 30 | {
|
|---|
| 31 | PROV_RC4_CTX *ctx = (PROV_RC4_CTX *)vctx;
|
|---|
| 32 |
|
|---|
| 33 | ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
|
|---|
| 34 | OPENSSL_clear_free(ctx, sizeof(*ctx));
|
|---|
| 35 | }
|
|---|
| 36 |
|
|---|
| 37 | static void *rc4_dupctx(void *ctx)
|
|---|
| 38 | {
|
|---|
| 39 | PROV_RC4_CTX *in = (PROV_RC4_CTX *)ctx;
|
|---|
| 40 | PROV_RC4_CTX *ret;
|
|---|
| 41 |
|
|---|
| 42 | if (!ossl_prov_is_running())
|
|---|
| 43 | return NULL;
|
|---|
| 44 |
|
|---|
| 45 | ret = OPENSSL_malloc(sizeof(*ret));
|
|---|
| 46 | if (ret == NULL) {
|
|---|
| 47 | ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
|
|---|
| 48 | return NULL;
|
|---|
| 49 | }
|
|---|
| 50 | *ret = *in;
|
|---|
| 51 |
|
|---|
| 52 | return ret;
|
|---|
| 53 | }
|
|---|
| 54 |
|
|---|
| 55 | static int rc4_einit(void *ctx, const unsigned char *key, size_t keylen,
|
|---|
| 56 | const unsigned char *iv, size_t ivlen,
|
|---|
| 57 | const OSSL_PARAM params[])
|
|---|
| 58 | {
|
|---|
| 59 | if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL))
|
|---|
| 60 | return 0;
|
|---|
| 61 | return ossl_cipher_var_keylen_set_ctx_params(ctx, params);
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | static int rc4_dinit(void *ctx, const unsigned char *key, size_t keylen,
|
|---|
| 65 | const unsigned char *iv, size_t ivlen,
|
|---|
| 66 | const OSSL_PARAM params[])
|
|---|
| 67 | {
|
|---|
| 68 | if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL))
|
|---|
| 69 | return 0;
|
|---|
| 70 | return ossl_cipher_var_keylen_set_ctx_params(ctx, params);
|
|---|
| 71 | }
|
|---|
| 72 |
|
|---|
| 73 | #define IMPLEMENT_cipher(alg, UCALG, flags, kbits, blkbits, ivbits, typ) \
|
|---|
| 74 | static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_get_params; \
|
|---|
| 75 | static int alg##_##kbits##_get_params(OSSL_PARAM params[]) \
|
|---|
| 76 | { \
|
|---|
| 77 | return ossl_cipher_generic_get_params(params, 0, flags, \
|
|---|
| 78 | kbits, blkbits, ivbits); \
|
|---|
| 79 | } \
|
|---|
| 80 | static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_newctx; \
|
|---|
| 81 | static void * alg##_##kbits##_newctx(void *provctx) \
|
|---|
| 82 | { \
|
|---|
| 83 | PROV_##UCALG##_CTX *ctx; \
|
|---|
| 84 | if (!ossl_prov_is_running()) \
|
|---|
| 85 | return NULL; \
|
|---|
| 86 | ctx = OPENSSL_zalloc(sizeof(*ctx)); \
|
|---|
| 87 | if (ctx != NULL) { \
|
|---|
| 88 | ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, 0, flags, \
|
|---|
| 89 | ossl_prov_cipher_hw_##alg(kbits), NULL); \
|
|---|
| 90 | } \
|
|---|
| 91 | return ctx; \
|
|---|
| 92 | } \
|
|---|
| 93 | const OSSL_DISPATCH ossl_##alg##kbits##_functions[] = { \
|
|---|
| 94 | { OSSL_FUNC_CIPHER_NEWCTX, \
|
|---|
| 95 | (void (*)(void)) alg##_##kbits##_newctx }, \
|
|---|
| 96 | { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
|
|---|
| 97 | { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
|
|---|
| 98 | { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc4_einit }, \
|
|---|
| 99 | { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc4_dinit }, \
|
|---|
| 100 | { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
|
|---|
| 101 | { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
|
|---|
| 102 | { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
|
|---|
| 103 | { OSSL_FUNC_CIPHER_GET_PARAMS, \
|
|---|
| 104 | (void (*)(void)) alg##_##kbits##_get_params }, \
|
|---|
| 105 | { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
|
|---|
| 106 | (void (*)(void))ossl_cipher_generic_get_ctx_params }, \
|
|---|
| 107 | { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
|
|---|
| 108 | (void (*)(void))ossl_cipher_var_keylen_set_ctx_params }, \
|
|---|
| 109 | { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
|
|---|
| 110 | (void (*)(void))ossl_cipher_generic_gettable_params }, \
|
|---|
| 111 | { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
|
|---|
| 112 | (void (*)(void))ossl_cipher_generic_gettable_ctx_params }, \
|
|---|
| 113 | { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
|
|---|
| 114 | (void (*)(void))ossl_cipher_var_keylen_settable_ctx_params }, \
|
|---|
| 115 | { 0, NULL } \
|
|---|
| 116 | };
|
|---|
| 117 |
|
|---|
| 118 | /* ossl_rc440_functions */
|
|---|
| 119 | IMPLEMENT_cipher(rc4, RC4, RC4_FLAGS, 40, 8, 0, stream)
|
|---|
| 120 | /* ossl_rc4128_functions */
|
|---|
| 121 | IMPLEMENT_cipher(rc4, RC4, RC4_FLAGS, 128, 8, 0, stream)
|
|---|
