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4657693d | 1 | /* |
fbd2ece1 | 2 | * Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved. |
4657693d RL |
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 | ||
7f6b035b | 10 | #include <string.h> |
23c48d94 | 11 | #include <openssl/core_dispatch.h> |
7f6b035b MC |
12 | #include <openssl/core_names.h> |
13 | #include <openssl/params.h> | |
14 | #include <openssl/evp.h> | |
15 | #include <openssl/err.h> | |
16 | ||
25f2138b | 17 | #include "crypto/siphash.h" |
4657693d RL |
18 | /* |
19 | * TODO(3.0) when siphash has moved entirely to our providers, this | |
20 | * header should be moved to the provider include directory. For the | |
21 | * moment, crypto/siphash/siphash_ameth.c has us stuck. | |
22 | */ | |
7f6b035b | 23 | #include "../../../crypto/siphash/siphash_local.h" |
4657693d | 24 | |
ddd21319 | 25 | #include "prov/providercommonerr.h" |
af3e7e1b | 26 | #include "prov/implementations.h" |
5b104a81 | 27 | #include "prov/providercommon.h" |
4657693d RL |
28 | |
29 | /* | |
30 | * Forward declaration of everything implemented here. This is not strictly | |
31 | * necessary for the compiler, but provides an assurance that the signatures | |
32 | * of the functions in the dispatch table are correct. | |
33 | */ | |
363b1e5d DMSP |
34 | static OSSL_FUNC_mac_newctx_fn siphash_new; |
35 | static OSSL_FUNC_mac_dupctx_fn siphash_dup; | |
36 | static OSSL_FUNC_mac_freectx_fn siphash_free; | |
37 | static OSSL_FUNC_mac_gettable_ctx_params_fn siphash_gettable_ctx_params; | |
38 | static OSSL_FUNC_mac_get_ctx_params_fn siphash_get_ctx_params; | |
39 | static OSSL_FUNC_mac_settable_ctx_params_fn siphash_settable_params; | |
40 | static OSSL_FUNC_mac_set_ctx_params_fn siphash_set_params; | |
41 | static OSSL_FUNC_mac_size_fn siphash_size; | |
42 | static OSSL_FUNC_mac_init_fn siphash_init; | |
43 | static OSSL_FUNC_mac_update_fn siphash_update; | |
44 | static OSSL_FUNC_mac_final_fn siphash_final; | |
4657693d RL |
45 | |
46 | struct siphash_data_st { | |
47 | void *provctx; | |
48 | SIPHASH siphash; /* Siphash data */ | |
49 | }; | |
50 | ||
51 | static void *siphash_new(void *provctx) | |
52 | { | |
5b104a81 | 53 | struct siphash_data_st *ctx; |
4657693d | 54 | |
5b104a81 P |
55 | if (!ossl_prov_is_running()) |
56 | return NULL; | |
57 | ctx = OPENSSL_zalloc(sizeof(*ctx)); | |
41a6d557 P |
58 | if (ctx != NULL) |
59 | ctx->provctx = provctx; | |
4657693d RL |
60 | return ctx; |
61 | } | |
62 | ||
63 | static void siphash_free(void *vmacctx) | |
64 | { | |
65 | OPENSSL_free(vmacctx); | |
66 | } | |
67 | ||
68 | static void *siphash_dup(void *vsrc) | |
69 | { | |
70 | struct siphash_data_st *ssrc = vsrc; | |
5b104a81 | 71 | struct siphash_data_st *sdst; |
4657693d | 72 | |
5b104a81 P |
73 | if (!ossl_prov_is_running()) |
74 | return NULL; | |
75 | sdst = siphash_new(ssrc->provctx); | |
4657693d RL |
76 | if (sdst == NULL) |
77 | return NULL; | |
78 | ||
79 | sdst->siphash = ssrc->siphash; | |
80 | return sdst; | |
81 | } | |
82 | ||
83 | static size_t siphash_size(void *vmacctx) | |
84 | { | |
85 | struct siphash_data_st *ctx = vmacctx; | |
86 | ||
87 | return SipHash_hash_size(&ctx->siphash); | |
88 | } | |
89 | ||
90 | static int siphash_init(void *vmacctx) | |
91 | { | |
92 | /* Not much to do here, actual initialization happens through controls */ | |
5b104a81 | 93 | return ossl_prov_is_running(); |
4657693d RL |
94 | } |
95 | ||
96 | static int siphash_update(void *vmacctx, const unsigned char *data, | |
97 | size_t datalen) | |
98 | { | |
99 | struct siphash_data_st *ctx = vmacctx; | |
100 | ||
0bc193dd MC |
101 | if (datalen == 0) |
102 | return 1; | |
103 | ||
4657693d RL |
104 | SipHash_Update(&ctx->siphash, data, datalen); |
105 | return 1; | |
106 | } | |
107 | ||
108 | static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl, | |
109 | size_t outsize) | |
110 | { | |
111 | struct siphash_data_st *ctx = vmacctx; | |
112 | size_t hlen = siphash_size(ctx); | |
113 | ||
5b104a81 | 114 | if (!ossl_prov_is_running() || outsize < hlen) |
4657693d RL |
115 | return 0; |
116 | ||
117 | *outl = hlen; | |
118 | return SipHash_Final(&ctx->siphash, out, hlen); | |
119 | } | |
120 | ||
121 | static const OSSL_PARAM known_gettable_ctx_params[] = { | |
703170d4 | 122 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), |
4657693d RL |
123 | OSSL_PARAM_END |
124 | }; | |
1017ab21 | 125 | static const OSSL_PARAM *siphash_gettable_ctx_params(ossl_unused void *provctx) |
4657693d RL |
126 | { |
127 | return known_gettable_ctx_params; | |
128 | } | |
129 | ||
92d9d0ae | 130 | static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[]) |
4657693d RL |
131 | { |
132 | OSSL_PARAM *p; | |
133 | ||
703170d4 | 134 | if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL) |
4657693d RL |
135 | return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx)); |
136 | ||
137 | return 1; | |
138 | } | |
139 | ||
140 | static const OSSL_PARAM known_settable_ctx_params[] = { | |
703170d4 | 141 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), |
4657693d RL |
142 | OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0), |
143 | OSSL_PARAM_END | |
144 | }; | |
af5e1e85 | 145 | static const OSSL_PARAM *siphash_settable_params(void *provctx) |
4657693d RL |
146 | { |
147 | return known_settable_ctx_params; | |
148 | } | |
149 | ||
150 | static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params) | |
151 | { | |
152 | struct siphash_data_st *ctx = vmacctx; | |
153 | const OSSL_PARAM *p = NULL; | |
154 | ||
703170d4 | 155 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) { |
4657693d RL |
156 | size_t size; |
157 | ||
158 | if (!OSSL_PARAM_get_size_t(p, &size) | |
159 | || !SipHash_set_hash_size(&ctx->siphash, size)) | |
160 | return 0; | |
161 | } | |
162 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) | |
163 | if (p->data_type != OSSL_PARAM_OCTET_STRING | |
164 | || p->data_size != SIPHASH_KEY_SIZE | |
165 | || !SipHash_Init(&ctx->siphash, p->data, 0, 0)) | |
166 | return 0; | |
167 | return 1; | |
168 | } | |
169 | ||
170 | const OSSL_DISPATCH siphash_functions[] = { | |
171 | { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new }, | |
172 | { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup }, | |
173 | { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free }, | |
174 | { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init }, | |
175 | { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update }, | |
176 | { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final }, | |
177 | { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS, | |
178 | (void (*)(void))siphash_gettable_ctx_params }, | |
92d9d0ae | 179 | { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params }, |
4657693d RL |
180 | { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, |
181 | (void (*)(void))siphash_settable_params }, | |
92d9d0ae | 182 | { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params }, |
4657693d RL |
183 | { 0, NULL } |
184 | }; |