1 | /* |
2 | * Copyright 2018 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 | #include <string.h> |
11 | #include <stdarg.h> |
12 | #include <openssl/evp.h> |
13 | #include <openssl/err.h> |
14 | #include <openssl/core.h> |
15 | #include <openssl/core_names.h> |
16 | #include <openssl/types.h> |
17 | #include "internal/nelem.h" |
18 | #include "crypto/evp.h" |
19 | #include "internal/provider.h" |
20 | #include "evp_local.h" |
21 | |
22 | EVP_MAC_CTX *EVP_MAC_CTX_new(EVP_MAC *mac) |
23 | { |
24 | EVP_MAC_CTX *ctx = OPENSSL_zalloc(sizeof(EVP_MAC_CTX)); |
25 | |
26 | if (ctx == NULL |
27 | || (ctx->data = mac->newctx(ossl_provider_ctx(mac->prov))) == NULL |
28 | || !EVP_MAC_up_ref(mac)) { |
29 | EVPerr(EVP_F_EVP_MAC_CTX_NEW, ERR_R_MALLOC_FAILURE); |
30 | if (ctx != NULL) |
31 | mac->freectx(ctx->data); |
32 | OPENSSL_free(ctx); |
33 | ctx = NULL; |
34 | } else { |
35 | ctx->meth = mac; |
36 | } |
37 | return ctx; |
38 | } |
39 | |
40 | void EVP_MAC_CTX_free(EVP_MAC_CTX *ctx) |
41 | { |
42 | if (ctx != NULL) { |
43 | ctx->meth->freectx(ctx->data); |
44 | ctx->data = NULL; |
45 | /* refcnt-- */ |
46 | EVP_MAC_free(ctx->meth); |
47 | } |
48 | OPENSSL_free(ctx); |
49 | } |
50 | |
51 | EVP_MAC_CTX *EVP_MAC_CTX_dup(const EVP_MAC_CTX *src) |
52 | { |
53 | EVP_MAC_CTX *dst; |
54 | |
55 | if (src->data == NULL) |
56 | return NULL; |
57 | |
58 | dst = OPENSSL_malloc(sizeof(*dst)); |
59 | if (dst == NULL) { |
60 | EVPerr(EVP_F_EVP_MAC_CTX_DUP, ERR_R_MALLOC_FAILURE); |
61 | return NULL; |
62 | } |
63 | |
64 | *dst = *src; |
65 | if (!EVP_MAC_up_ref(dst->meth)) { |
66 | EVPerr(EVP_F_EVP_MAC_CTX_DUP, ERR_R_MALLOC_FAILURE); |
67 | OPENSSL_free(dst); |
68 | return NULL; |
69 | } |
70 | |
71 | dst->data = src->meth->dupctx(src->data); |
72 | if (dst->data == NULL) { |
73 | EVP_MAC_CTX_free(dst); |
74 | return NULL; |
75 | } |
76 | |
77 | return dst; |
78 | } |
79 | |
80 | EVP_MAC *EVP_MAC_CTX_mac(EVP_MAC_CTX *ctx) |
81 | { |
82 | return ctx->meth; |
83 | } |
84 | |
85 | size_t EVP_MAC_size(EVP_MAC_CTX *ctx) |
86 | { |
87 | size_t sz = 0; |
88 | |
89 | if (ctx->data != NULL) { |
90 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
91 | |
92 | params[0] = OSSL_PARAM_construct_size_t(OSSL_MAC_PARAM_SIZE, &sz); |
93 | if (ctx->meth->get_ctx_params != NULL) { |
94 | if (ctx->meth->get_ctx_params(ctx->data, params)) |
95 | return sz; |
96 | } else if (ctx->meth->get_params != NULL) { |
97 | if (ctx->meth->get_params(params)) |
98 | return sz; |
99 | } |
100 | } |
101 | /* |
102 | * If the MAC hasn't been initialized yet, or there is no size to get, |
103 | * we return zero |
104 | */ |
105 | return 0; |
106 | } |
107 | |
108 | int EVP_MAC_init(EVP_MAC_CTX *ctx) |
109 | { |
110 | return ctx->meth->init(ctx->data); |
111 | } |
112 | |
113 | int EVP_MAC_update(EVP_MAC_CTX *ctx, const unsigned char *data, size_t datalen) |
114 | { |
115 | if (datalen == 0) |
116 | return 1; |
117 | return ctx->meth->update(ctx->data, data, datalen); |
118 | } |
119 | |
120 | int EVP_MAC_final(EVP_MAC_CTX *ctx, |
121 | unsigned char *out, size_t *outl, size_t outsize) |
122 | { |
123 | int l = EVP_MAC_size(ctx); |
124 | |
125 | if (l < 0) |
126 | return 0; |
127 | if (outl != NULL) |
128 | *outl = l; |
129 | if (out == NULL) |
130 | return 1; |
131 | return ctx->meth->final(ctx->data, out, outl, outsize); |
132 | } |
133 | |
134 | /* |
135 | * The {get,set}_params functions return 1 if there is no corresponding |
136 | * function in the implementation. This is the same as if there was one, |
137 | * but it didn't recognise any of the given params, i.e. nothing in the |
138 | * bag of parameters was useful. |
139 | */ |
140 | int EVP_MAC_get_params(EVP_MAC *mac, OSSL_PARAM params[]) |
141 | { |
142 | if (mac->get_params != NULL) |
143 | return mac->get_params(params); |
144 | return 1; |
145 | } |
146 | |
147 | int EVP_MAC_CTX_get_params(EVP_MAC_CTX *ctx, OSSL_PARAM params[]) |
148 | { |
149 | if (ctx->meth->get_ctx_params != NULL) |
150 | return ctx->meth->get_ctx_params(ctx->data, params); |
151 | return 1; |
152 | } |
153 | |
154 | int EVP_MAC_CTX_set_params(EVP_MAC_CTX *ctx, const OSSL_PARAM params[]) |
155 | { |
156 | if (ctx->meth->set_ctx_params != NULL) |
157 | return ctx->meth->set_ctx_params(ctx->data, params); |
158 | return 1; |
159 | } |
160 | |
161 | int EVP_MAC_number(const EVP_MAC *mac) |
162 | { |
163 | return mac->name_id; |
164 | } |
165 | |
166 | int EVP_MAC_is_a(const EVP_MAC *mac, const char *name) |
167 | { |
168 | return evp_is_a(mac->prov, mac->name_id, name); |
169 | } |
170 | |
171 | void EVP_MAC_names_do_all(const EVP_MAC *mac, |
172 | void (*fn)(const char *name, void *data), |
173 | void *data) |
174 | { |
175 | if (mac->prov != NULL) |
176 | evp_names_do_all(mac->prov, mac->name_id, fn, data); |
177 | } |
178 | |