/src/openssl/providers/implementations/ciphers/cipher_rc4.c
Line | Count | Source |
1 | | /* |
2 | | * Copyright 2019-2023 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 | 0 | { |
31 | 0 | PROV_RC4_CTX *ctx = (PROV_RC4_CTX *)vctx; |
32 | |
|
33 | 0 | ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx); |
34 | 0 | OPENSSL_clear_free(ctx, sizeof(*ctx)); |
35 | 0 | } |
36 | | |
37 | | static void *rc4_dupctx(void *ctx) |
38 | 0 | { |
39 | 0 | PROV_RC4_CTX *in = (PROV_RC4_CTX *)ctx; |
40 | 0 | PROV_RC4_CTX *ret; |
41 | |
|
42 | 0 | if (!ossl_prov_is_running()) |
43 | 0 | return NULL; |
44 | | |
45 | 0 | ret = OPENSSL_malloc(sizeof(*ret)); |
46 | 0 | if (ret == NULL) |
47 | 0 | return NULL; |
48 | 0 | *ret = *in; |
49 | |
|
50 | 0 | return ret; |
51 | 0 | } |
52 | | |
53 | | static int rc4_einit(void *ctx, const unsigned char *key, size_t keylen, |
54 | | const unsigned char *iv, size_t ivlen, |
55 | | const OSSL_PARAM params[]) |
56 | 0 | { |
57 | 0 | if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL)) |
58 | 0 | return 0; |
59 | 0 | return ossl_cipher_var_keylen_set_ctx_params(ctx, params); |
60 | 0 | } |
61 | | |
62 | | static int rc4_dinit(void *ctx, const unsigned char *key, size_t keylen, |
63 | | const unsigned char *iv, size_t ivlen, |
64 | | const OSSL_PARAM params[]) |
65 | 0 | { |
66 | 0 | if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL)) |
67 | 0 | return 0; |
68 | 0 | return ossl_cipher_var_keylen_set_ctx_params(ctx, params); |
69 | 0 | } |
70 | | |
71 | | #define IMPLEMENT_cipher(alg, UCALG, flags, kbits, blkbits, ivbits, typ) \ |
72 | | static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_get_params; \ |
73 | | static int alg##_##kbits##_get_params(OSSL_PARAM params[]) \ |
74 | 2 | { \ |
75 | 2 | return ossl_cipher_generic_get_params(params, 0, flags, \ |
76 | 2 | kbits, blkbits, ivbits); \ |
77 | 2 | } \ cipher_rc4.c:rc4_40_get_params Line | Count | Source | 74 | 1 | { \ | 75 | 1 | return ossl_cipher_generic_get_params(params, 0, flags, \ | 76 | 1 | kbits, blkbits, ivbits); \ | 77 | 1 | } \ |
cipher_rc4.c:rc4_128_get_params Line | Count | Source | 74 | 1 | { \ | 75 | 1 | return ossl_cipher_generic_get_params(params, 0, flags, \ | 76 | 1 | kbits, blkbits, ivbits); \ | 77 | 1 | } \ |
|
78 | | static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_newctx; \ |
79 | | static void *alg##_##kbits##_newctx(void *provctx) \ |
80 | 0 | { \ |
81 | 0 | PROV_##UCALG##_CTX *ctx; \ |
82 | 0 | if (!ossl_prov_is_running()) \ |
83 | 0 | return NULL; \ |
84 | 0 | ctx = OPENSSL_zalloc(sizeof(*ctx)); \ |
85 | 0 | if (ctx != NULL) { \ |
86 | 0 | ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, 0, flags, \ |
87 | 0 | ossl_prov_cipher_hw_##alg(kbits), NULL); \ |
88 | 0 | } \ |
89 | 0 | return ctx; \ |
90 | 0 | } \ |
91 | | const OSSL_DISPATCH ossl_##alg##kbits##_functions[] = { \ |
92 | | { OSSL_FUNC_CIPHER_NEWCTX, \ |
93 | | (void (*)(void))alg##_##kbits##_newctx }, \ |
94 | | { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))alg##_freectx }, \ |
95 | | { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))alg##_dupctx }, \ |
96 | | { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc4_einit }, \ |
97 | | { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc4_dinit }, \ |
98 | | { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update }, \ |
99 | | { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \ |
100 | | { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \ |
101 | | { OSSL_FUNC_CIPHER_GET_PARAMS, \ |
102 | | (void (*)(void))alg##_##kbits##_get_params }, \ |
103 | | { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \ |
104 | | (void (*)(void))ossl_cipher_generic_get_ctx_params }, \ |
105 | | { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \ |
106 | | (void (*)(void))ossl_cipher_var_keylen_set_ctx_params }, \ |
107 | | { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \ |
108 | | (void (*)(void))ossl_cipher_generic_gettable_params }, \ |
109 | | { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \ |
110 | | (void (*)(void))ossl_cipher_generic_gettable_ctx_params }, \ |
111 | | { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \ |
112 | | (void (*)(void))ossl_cipher_var_keylen_settable_ctx_params }, \ |
113 | | OSSL_DISPATCH_END \ |
114 | | }; |
115 | | |
116 | | /* ossl_rc440_functions */ |
117 | 0 | IMPLEMENT_cipher(rc4, RC4, RC4_FLAGS, 40, 8, 0, stream) |
118 | | /* ossl_rc4128_functions */ |
119 | | IMPLEMENT_cipher(rc4, RC4, RC4_FLAGS, 128, 8, 0, stream) |