2 * Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include <openssl/evp.h>
11 #include <openssl/core_names.h>
12 #include <openssl/proverr.h>
13 #include <openssl/err.h>
14 #include "prov/provider_ctx.h"
15 #include "prov/providercommon.h"
16 #include "prov/implementations.h"
17 #include "prov/provider_util.h"
19 static OSSL_FUNC_kdf_newctx_fn kdf_pvk_new;
20 static OSSL_FUNC_kdf_dupctx_fn kdf_pvk_dup;
21 static OSSL_FUNC_kdf_freectx_fn kdf_pvk_free;
22 static OSSL_FUNC_kdf_reset_fn kdf_pvk_reset;
23 static OSSL_FUNC_kdf_derive_fn kdf_pvk_derive;
24 static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_pvk_settable_ctx_params;
25 static OSSL_FUNC_kdf_set_ctx_params_fn kdf_pvk_set_ctx_params;
26 static OSSL_FUNC_kdf_gettable_ctx_params_fn kdf_pvk_gettable_ctx_params;
27 static OSSL_FUNC_kdf_get_ctx_params_fn kdf_pvk_get_ctx_params;
38 static void kdf_pvk_init(KDF_PVK *ctx);
40 static void *kdf_pvk_new(void *provctx)
44 if (!ossl_prov_is_running())
47 ctx = OPENSSL_zalloc(sizeof(*ctx));
49 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
52 ctx->provctx = provctx;
57 static void kdf_pvk_cleanup(KDF_PVK *ctx)
59 ossl_prov_digest_reset(&ctx->digest);
60 OPENSSL_free(ctx->salt);
61 OPENSSL_clear_free(ctx->pass, ctx->pass_len);
62 OPENSSL_cleanse(ctx, sizeof(*ctx));
65 static void kdf_pvk_free(void *vctx)
67 KDF_PVK *ctx = (KDF_PVK *)vctx;
75 static void *kdf_pvk_dup(void *vctx)
77 const KDF_PVK *src = (const KDF_PVK *)vctx;
80 dest = kdf_pvk_new(src->provctx);
82 if (!ossl_prov_memdup(src->salt, src->salt_len,
83 &dest->salt, &dest->salt_len)
84 || !ossl_prov_memdup(src->pass, src->pass_len,
85 &dest->pass , &dest->pass_len)
86 || !ossl_prov_digest_copy(&dest->digest, &src->digest))
95 static void kdf_pvk_reset(void *vctx)
97 KDF_PVK *ctx = (KDF_PVK *)vctx;
98 void *provctx = ctx->provctx;
100 kdf_pvk_cleanup(ctx);
101 ctx->provctx = provctx;
105 static void kdf_pvk_init(KDF_PVK *ctx)
107 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
108 OSSL_LIB_CTX *provctx = PROV_LIBCTX_OF(ctx->provctx);
110 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
112 if (!ossl_prov_digest_load_from_params(&ctx->digest, params, provctx))
113 /* This is an error, but there is no way to indicate such directly */
114 ossl_prov_digest_reset(&ctx->digest);
117 static int pvk_set_membuf(unsigned char **buffer, size_t *buflen,
120 OPENSSL_clear_free(*buffer, *buflen);
124 if (p->data_size == 0) {
125 if ((*buffer = OPENSSL_malloc(1)) == NULL) {
126 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
129 } else if (p->data != NULL) {
130 if (!OSSL_PARAM_get_octet_string(p, (void **)buffer, 0, buflen))
136 static int kdf_pvk_derive(void *vctx, unsigned char *key, size_t keylen,
137 const OSSL_PARAM params[])
139 KDF_PVK *ctx = (KDF_PVK *)vctx;
144 if (!ossl_prov_is_running() || !kdf_pvk_set_ctx_params(ctx, params))
147 if (ctx->pass == NULL) {
148 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_PASS);
152 if (ctx->salt == NULL) {
153 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_SALT);
157 md = ossl_prov_digest_md(&ctx->digest);
159 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST);
162 res = EVP_MD_get_size(md);
164 ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
167 if ((size_t)res > keylen) {
168 ERR_raise(ERR_LIB_PROV, PROV_R_LENGTH_TOO_LARGE);
172 mctx = EVP_MD_CTX_new();
174 && EVP_DigestInit_ex(mctx, md, NULL)
175 && EVP_DigestUpdate(mctx, ctx->salt, ctx->salt_len)
176 && EVP_DigestUpdate(mctx, ctx->pass, ctx->pass_len)
177 && EVP_DigestFinal_ex(mctx, key, NULL);
178 EVP_MD_CTX_free(mctx);
182 static int kdf_pvk_set_ctx_params(void *vctx, const OSSL_PARAM params[])
186 OSSL_LIB_CTX *provctx = PROV_LIBCTX_OF(ctx->provctx);
191 if (!ossl_prov_digest_load_from_params(&ctx->digest, params, provctx))
194 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PASSWORD)) != NULL)
195 if (!pvk_set_membuf(&ctx->pass, &ctx->pass_len, p))
198 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SALT)) != NULL) {
199 if (!pvk_set_membuf(&ctx->salt, &ctx->salt_len, p))
206 static const OSSL_PARAM *kdf_pvk_settable_ctx_params(ossl_unused void *ctx,
207 ossl_unused void *p_ctx)
209 static const OSSL_PARAM known_settable_ctx_params[] = {
210 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_PROPERTIES, NULL, 0),
211 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_DIGEST, NULL, 0),
212 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_PASSWORD, NULL, 0),
213 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SALT, NULL, 0),
216 return known_settable_ctx_params;
219 static int kdf_pvk_get_ctx_params(void *vctx, OSSL_PARAM params[])
223 if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL)
224 return OSSL_PARAM_set_size_t(p, SIZE_MAX);
228 static const OSSL_PARAM *kdf_pvk_gettable_ctx_params(ossl_unused void *ctx,
229 ossl_unused void *p_ctx)
231 static const OSSL_PARAM known_gettable_ctx_params[] = {
232 OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL),
235 return known_gettable_ctx_params;
238 const OSSL_DISPATCH ossl_kdf_pvk_functions[] = {
239 { OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_pvk_new },
240 { OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_pvk_dup },
241 { OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_pvk_free },
242 { OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_pvk_reset },
243 { OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_pvk_derive },
244 { OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS,
245 (void(*)(void))kdf_pvk_settable_ctx_params },
246 { OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_pvk_set_ctx_params },
247 { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS,
248 (void(*)(void))kdf_pvk_gettable_ctx_params },
249 { OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_pvk_get_ctx_params },