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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 <openssl/opensslconf.h> | |
11 | #ifndef OPENSSL_NO_SIPHASH | |
12 | ||
13 | # include <string.h> | |
14 | # include <openssl/core_numbers.h> | |
15 | # include <openssl/core_names.h> | |
16 | # include <openssl/params.h> | |
17 | # include <openssl/evp.h> | |
18 | # include <openssl/err.h> | |
19 | ||
20 | # include "internal/siphash.h" | |
21 | /* | |
22 | * TODO(3.0) when siphash has moved entirely to our providers, this | |
23 | * header should be moved to the provider include directory. For the | |
24 | * moment, crypto/siphash/siphash_ameth.c has us stuck. | |
25 | */ | |
26 | # include "../../../crypto/siphash/siphash_local.h" | |
27 | ||
28 | # include "internal/providercommonerr.h" | |
29 | # include "internal/provider_algs.h" | |
30 | ||
31 | /* | |
32 | * Forward declaration of everything implemented here. This is not strictly | |
33 | * necessary for the compiler, but provides an assurance that the signatures | |
34 | * of the functions in the dispatch table are correct. | |
35 | */ | |
36 | static OSSL_OP_mac_newctx_fn siphash_new; | |
37 | static OSSL_OP_mac_dupctx_fn siphash_dup; | |
38 | static OSSL_OP_mac_freectx_fn siphash_free; | |
39 | static OSSL_OP_mac_gettable_ctx_params_fn siphash_gettable_ctx_params; | |
92d9d0ae | 40 | static OSSL_OP_mac_get_ctx_params_fn siphash_get_ctx_params; |
4657693d | 41 | static OSSL_OP_mac_settable_ctx_params_fn siphash_settable_params; |
92d9d0ae | 42 | static OSSL_OP_mac_set_ctx_params_fn siphash_set_params; |
4657693d RL |
43 | static OSSL_OP_mac_size_fn siphash_size; |
44 | static OSSL_OP_mac_init_fn siphash_init; | |
45 | static OSSL_OP_mac_update_fn siphash_update; | |
46 | static OSSL_OP_mac_final_fn siphash_final; | |
47 | ||
48 | struct siphash_data_st { | |
49 | void *provctx; | |
50 | SIPHASH siphash; /* Siphash data */ | |
51 | }; | |
52 | ||
53 | static void *siphash_new(void *provctx) | |
54 | { | |
55 | struct siphash_data_st *ctx = OPENSSL_zalloc(sizeof(*ctx)); | |
56 | ||
57 | ctx->provctx = provctx; | |
58 | return ctx; | |
59 | } | |
60 | ||
61 | static void siphash_free(void *vmacctx) | |
62 | { | |
63 | OPENSSL_free(vmacctx); | |
64 | } | |
65 | ||
66 | static void *siphash_dup(void *vsrc) | |
67 | { | |
68 | struct siphash_data_st *ssrc = vsrc; | |
69 | struct siphash_data_st *sdst = siphash_new(ssrc->provctx); | |
70 | ||
71 | if (sdst == NULL) | |
72 | return NULL; | |
73 | ||
74 | sdst->siphash = ssrc->siphash; | |
75 | return sdst; | |
76 | } | |
77 | ||
78 | static size_t siphash_size(void *vmacctx) | |
79 | { | |
80 | struct siphash_data_st *ctx = vmacctx; | |
81 | ||
82 | return SipHash_hash_size(&ctx->siphash); | |
83 | } | |
84 | ||
85 | static int siphash_init(void *vmacctx) | |
86 | { | |
87 | /* Not much to do here, actual initialization happens through controls */ | |
88 | return 1; | |
89 | } | |
90 | ||
91 | static int siphash_update(void *vmacctx, const unsigned char *data, | |
92 | size_t datalen) | |
93 | { | |
94 | struct siphash_data_st *ctx = vmacctx; | |
95 | ||
96 | SipHash_Update(&ctx->siphash, data, datalen); | |
97 | return 1; | |
98 | } | |
99 | ||
100 | static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl, | |
101 | size_t outsize) | |
102 | { | |
103 | struct siphash_data_st *ctx = vmacctx; | |
104 | size_t hlen = siphash_size(ctx); | |
105 | ||
106 | if (outsize < hlen) | |
107 | return 0; | |
108 | ||
109 | *outl = hlen; | |
110 | return SipHash_Final(&ctx->siphash, out, hlen); | |
111 | } | |
112 | ||
113 | static const OSSL_PARAM known_gettable_ctx_params[] = { | |
114 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_OUTLEN, NULL), | |
115 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), /* Same as "outlen" */ | |
116 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_DIGESTSIZE, NULL), /* Same as "outlen" */ | |
117 | OSSL_PARAM_END | |
118 | }; | |
119 | static const OSSL_PARAM *siphash_gettable_ctx_params(void) | |
120 | { | |
121 | return known_gettable_ctx_params; | |
122 | } | |
123 | ||
92d9d0ae | 124 | static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[]) |
4657693d RL |
125 | { |
126 | OSSL_PARAM *p; | |
127 | ||
128 | if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_OUTLEN)) != NULL | |
129 | || (p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL | |
130 | || (p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_DIGESTSIZE)) != NULL) | |
131 | return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx)); | |
132 | ||
133 | return 1; | |
134 | } | |
135 | ||
136 | static const OSSL_PARAM known_settable_ctx_params[] = { | |
137 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_OUTLEN, NULL), | |
138 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), /* Same as "outlen" */ | |
139 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_DIGESTSIZE, NULL), /* Same as "outlen" */ | |
140 | OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0), | |
141 | OSSL_PARAM_END | |
142 | }; | |
143 | static const OSSL_PARAM *siphash_settable_params(void) | |
144 | { | |
145 | return known_settable_ctx_params; | |
146 | } | |
147 | ||
148 | static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params) | |
149 | { | |
150 | struct siphash_data_st *ctx = vmacctx; | |
151 | const OSSL_PARAM *p = NULL; | |
152 | ||
153 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_OUTLEN)) != NULL | |
154 | || ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_DIGESTSIZE)) | |
155 | != NULL) | |
156 | || ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) | |
157 | != NULL)) { | |
158 | size_t size; | |
159 | ||
160 | if (!OSSL_PARAM_get_size_t(p, &size) | |
161 | || !SipHash_set_hash_size(&ctx->siphash, size)) | |
162 | return 0; | |
163 | } | |
164 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) | |
165 | if (p->data_type != OSSL_PARAM_OCTET_STRING | |
166 | || p->data_size != SIPHASH_KEY_SIZE | |
167 | || !SipHash_Init(&ctx->siphash, p->data, 0, 0)) | |
168 | return 0; | |
169 | return 1; | |
170 | } | |
171 | ||
172 | const OSSL_DISPATCH siphash_functions[] = { | |
173 | { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new }, | |
174 | { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup }, | |
175 | { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free }, | |
176 | { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init }, | |
177 | { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update }, | |
178 | { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final }, | |
179 | { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS, | |
180 | (void (*)(void))siphash_gettable_ctx_params }, | |
92d9d0ae | 181 | { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params }, |
4657693d RL |
182 | { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, |
183 | (void (*)(void))siphash_settable_params }, | |
92d9d0ae | 184 | { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params }, |
4657693d RL |
185 | { 0, NULL } |
186 | }; | |
187 | ||
188 | #endif |