1 /*
2 * Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2018-2019, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include "internal/cryptlib.h"
14 #include <openssl/evp.h>
15 #include <openssl/kdf.h>
16 #include <openssl/core.h>
17 #include <openssl/core_names.h>
18 #include "crypto/evp.h"
19 #include "internal/numbers.h"
20 #include "internal/provider.h"
21 #include "evp_local.h"
22
EVP_KDF_CTX_new(EVP_KDF * kdf)23 EVP_KDF_CTX *EVP_KDF_CTX_new(EVP_KDF *kdf)
24 {
25 EVP_KDF_CTX *ctx = NULL;
26
27 if (kdf == NULL)
28 return NULL;
29
30 ctx = OPENSSL_zalloc(sizeof(EVP_KDF_CTX));
31 if (ctx == NULL
32 || (ctx->algctx = kdf->newctx(ossl_provider_ctx(kdf->prov))) == NULL
33 || !EVP_KDF_up_ref(kdf)) {
34 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
35 if (ctx != NULL)
36 kdf->freectx(ctx->algctx);
37 OPENSSL_free(ctx);
38 ctx = NULL;
39 } else {
40 ctx->meth = kdf;
41 }
42 return ctx;
43 }
44
EVP_KDF_CTX_free(EVP_KDF_CTX * ctx)45 void EVP_KDF_CTX_free(EVP_KDF_CTX *ctx)
46 {
47 if (ctx == NULL)
48 return;
49 ctx->meth->freectx(ctx->algctx);
50 ctx->algctx = NULL;
51 EVP_KDF_free(ctx->meth);
52 OPENSSL_free(ctx);
53 }
54
EVP_KDF_CTX_dup(const EVP_KDF_CTX * src)55 EVP_KDF_CTX *EVP_KDF_CTX_dup(const EVP_KDF_CTX *src)
56 {
57 EVP_KDF_CTX *dst;
58
59 if (src == NULL || src->algctx == NULL || src->meth->dupctx == NULL)
60 return NULL;
61
62 dst = OPENSSL_malloc(sizeof(*dst));
63 if (dst == NULL) {
64 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
65 return NULL;
66 }
67
68 memcpy(dst, src, sizeof(*dst));
69 if (!EVP_KDF_up_ref(dst->meth)) {
70 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
71 OPENSSL_free(dst);
72 return NULL;
73 }
74
75 dst->algctx = src->meth->dupctx(src->algctx);
76 if (dst->algctx == NULL) {
77 EVP_KDF_CTX_free(dst);
78 return NULL;
79 }
80 return dst;
81 }
82
evp_kdf_get_number(const EVP_KDF * kdf)83 int evp_kdf_get_number(const EVP_KDF *kdf)
84 {
85 return kdf->name_id;
86 }
87
EVP_KDF_get0_name(const EVP_KDF * kdf)88 const char *EVP_KDF_get0_name(const EVP_KDF *kdf)
89 {
90 return kdf->type_name;
91 }
92
EVP_KDF_get0_description(const EVP_KDF * kdf)93 const char *EVP_KDF_get0_description(const EVP_KDF *kdf)
94 {
95 return kdf->description;
96 }
97
EVP_KDF_is_a(const EVP_KDF * kdf,const char * name)98 int EVP_KDF_is_a(const EVP_KDF *kdf, const char *name)
99 {
100 return kdf != NULL && evp_is_a(kdf->prov, kdf->name_id, NULL, name);
101 }
102
EVP_KDF_get0_provider(const EVP_KDF * kdf)103 const OSSL_PROVIDER *EVP_KDF_get0_provider(const EVP_KDF *kdf)
104 {
105 return kdf->prov;
106 }
107
EVP_KDF_CTX_kdf(EVP_KDF_CTX * ctx)108 const EVP_KDF *EVP_KDF_CTX_kdf(EVP_KDF_CTX *ctx)
109 {
110 return ctx->meth;
111 }
112
EVP_KDF_CTX_reset(EVP_KDF_CTX * ctx)113 void EVP_KDF_CTX_reset(EVP_KDF_CTX *ctx)
114 {
115 if (ctx == NULL)
116 return;
117
118 if (ctx->meth->reset != NULL)
119 ctx->meth->reset(ctx->algctx);
120 }
121
EVP_KDF_CTX_get_kdf_size(EVP_KDF_CTX * ctx)122 size_t EVP_KDF_CTX_get_kdf_size(EVP_KDF_CTX *ctx)
123 {
124 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
125 size_t s = 0;
126
127 if (ctx == NULL)
128 return 0;
129
130 *params = OSSL_PARAM_construct_size_t(OSSL_KDF_PARAM_SIZE, &s);
131 if (ctx->meth->get_ctx_params != NULL
132 && ctx->meth->get_ctx_params(ctx->algctx, params))
133 return s;
134 if (ctx->meth->get_params != NULL
135 && ctx->meth->get_params(params))
136 return s;
137 return 0;
138 }
139
EVP_KDF_derive(EVP_KDF_CTX * ctx,unsigned char * key,size_t keylen,const OSSL_PARAM params[])140 int EVP_KDF_derive(EVP_KDF_CTX *ctx, unsigned char *key, size_t keylen,
141 const OSSL_PARAM params[])
142 {
143 if (ctx == NULL)
144 return 0;
145
146 return ctx->meth->derive(ctx->algctx, key, keylen, params);
147 }
148
149 /*
150 * The {get,set}_params functions return 1 if there is no corresponding
151 * function in the implementation. This is the same as if there was one,
152 * but it didn't recognise any of the given params, i.e. nothing in the
153 * bag of parameters was useful.
154 */
EVP_KDF_get_params(EVP_KDF * kdf,OSSL_PARAM params[])155 int EVP_KDF_get_params(EVP_KDF *kdf, OSSL_PARAM params[])
156 {
157 if (kdf->get_params != NULL)
158 return kdf->get_params(params);
159 return 1;
160 }
161
EVP_KDF_CTX_get_params(EVP_KDF_CTX * ctx,OSSL_PARAM params[])162 int EVP_KDF_CTX_get_params(EVP_KDF_CTX *ctx, OSSL_PARAM params[])
163 {
164 if (ctx->meth->get_ctx_params != NULL)
165 return ctx->meth->get_ctx_params(ctx->algctx, params);
166 return 1;
167 }
168
EVP_KDF_CTX_set_params(EVP_KDF_CTX * ctx,const OSSL_PARAM params[])169 int EVP_KDF_CTX_set_params(EVP_KDF_CTX *ctx, const OSSL_PARAM params[])
170 {
171 if (ctx->meth->set_ctx_params != NULL)
172 return ctx->meth->set_ctx_params(ctx->algctx, params);
173 return 1;
174 }
175
EVP_KDF_names_do_all(const EVP_KDF * kdf,void (* fn)(const char * name,void * data),void * data)176 int EVP_KDF_names_do_all(const EVP_KDF *kdf,
177 void (*fn)(const char *name, void *data),
178 void *data)
179 {
180 if (kdf->prov != NULL)
181 return evp_names_do_all(kdf->prov, kdf->name_id, fn, data);
182
183 return 1;
184 }
185