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4657693d RL |
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 | ||
7f6b035b MC |
10 | #include <string.h> |
11 | #include <openssl/core_numbers.h> | |
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 | |
7f6b035b MC |
25 | #include "internal/providercommonerr.h" |
26 | #include "internal/provider_algs.h" | |
4657693d RL |
27 | |
28 | /* | |
29 | * Forward declaration of everything implemented here. This is not strictly | |
30 | * necessary for the compiler, but provides an assurance that the signatures | |
31 | * of the functions in the dispatch table are correct. | |
32 | */ | |
33 | static OSSL_OP_mac_newctx_fn siphash_new; | |
34 | static OSSL_OP_mac_dupctx_fn siphash_dup; | |
35 | static OSSL_OP_mac_freectx_fn siphash_free; | |
36 | static OSSL_OP_mac_gettable_ctx_params_fn siphash_gettable_ctx_params; | |
92d9d0ae | 37 | static OSSL_OP_mac_get_ctx_params_fn siphash_get_ctx_params; |
4657693d | 38 | static OSSL_OP_mac_settable_ctx_params_fn siphash_settable_params; |
92d9d0ae | 39 | static OSSL_OP_mac_set_ctx_params_fn siphash_set_params; |
4657693d RL |
40 | static OSSL_OP_mac_size_fn siphash_size; |
41 | static OSSL_OP_mac_init_fn siphash_init; | |
42 | static OSSL_OP_mac_update_fn siphash_update; | |
43 | static OSSL_OP_mac_final_fn siphash_final; | |
44 | ||
45 | struct siphash_data_st { | |
46 | void *provctx; | |
47 | SIPHASH siphash; /* Siphash data */ | |
48 | }; | |
49 | ||
50 | static void *siphash_new(void *provctx) | |
51 | { | |
52 | struct siphash_data_st *ctx = OPENSSL_zalloc(sizeof(*ctx)); | |
53 | ||
54 | ctx->provctx = provctx; | |
55 | return ctx; | |
56 | } | |
57 | ||
58 | static void siphash_free(void *vmacctx) | |
59 | { | |
60 | OPENSSL_free(vmacctx); | |
61 | } | |
62 | ||
63 | static void *siphash_dup(void *vsrc) | |
64 | { | |
65 | struct siphash_data_st *ssrc = vsrc; | |
66 | struct siphash_data_st *sdst = siphash_new(ssrc->provctx); | |
67 | ||
68 | if (sdst == NULL) | |
69 | return NULL; | |
70 | ||
71 | sdst->siphash = ssrc->siphash; | |
72 | return sdst; | |
73 | } | |
74 | ||
75 | static size_t siphash_size(void *vmacctx) | |
76 | { | |
77 | struct siphash_data_st *ctx = vmacctx; | |
78 | ||
79 | return SipHash_hash_size(&ctx->siphash); | |
80 | } | |
81 | ||
82 | static int siphash_init(void *vmacctx) | |
83 | { | |
84 | /* Not much to do here, actual initialization happens through controls */ | |
85 | return 1; | |
86 | } | |
87 | ||
88 | static int siphash_update(void *vmacctx, const unsigned char *data, | |
89 | size_t datalen) | |
90 | { | |
91 | struct siphash_data_st *ctx = vmacctx; | |
92 | ||
93 | SipHash_Update(&ctx->siphash, data, datalen); | |
94 | return 1; | |
95 | } | |
96 | ||
97 | static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl, | |
98 | size_t outsize) | |
99 | { | |
100 | struct siphash_data_st *ctx = vmacctx; | |
101 | size_t hlen = siphash_size(ctx); | |
102 | ||
103 | if (outsize < hlen) | |
104 | return 0; | |
105 | ||
106 | *outl = hlen; | |
107 | return SipHash_Final(&ctx->siphash, out, hlen); | |
108 | } | |
109 | ||
110 | static const OSSL_PARAM known_gettable_ctx_params[] = { | |
703170d4 | 111 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), |
4657693d RL |
112 | OSSL_PARAM_END |
113 | }; | |
114 | static const OSSL_PARAM *siphash_gettable_ctx_params(void) | |
115 | { | |
116 | return known_gettable_ctx_params; | |
117 | } | |
118 | ||
92d9d0ae | 119 | static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[]) |
4657693d RL |
120 | { |
121 | OSSL_PARAM *p; | |
122 | ||
703170d4 | 123 | if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL) |
4657693d RL |
124 | return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx)); |
125 | ||
126 | return 1; | |
127 | } | |
128 | ||
129 | static const OSSL_PARAM known_settable_ctx_params[] = { | |
703170d4 | 130 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), |
4657693d RL |
131 | OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0), |
132 | OSSL_PARAM_END | |
133 | }; | |
134 | static const OSSL_PARAM *siphash_settable_params(void) | |
135 | { | |
136 | return known_settable_ctx_params; | |
137 | } | |
138 | ||
139 | static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params) | |
140 | { | |
141 | struct siphash_data_st *ctx = vmacctx; | |
142 | const OSSL_PARAM *p = NULL; | |
143 | ||
703170d4 | 144 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) { |
4657693d RL |
145 | size_t size; |
146 | ||
147 | if (!OSSL_PARAM_get_size_t(p, &size) | |
148 | || !SipHash_set_hash_size(&ctx->siphash, size)) | |
149 | return 0; | |
150 | } | |
151 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) | |
152 | if (p->data_type != OSSL_PARAM_OCTET_STRING | |
153 | || p->data_size != SIPHASH_KEY_SIZE | |
154 | || !SipHash_Init(&ctx->siphash, p->data, 0, 0)) | |
155 | return 0; | |
156 | return 1; | |
157 | } | |
158 | ||
159 | const OSSL_DISPATCH siphash_functions[] = { | |
160 | { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new }, | |
161 | { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup }, | |
162 | { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free }, | |
163 | { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init }, | |
164 | { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update }, | |
165 | { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final }, | |
166 | { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS, | |
167 | (void (*)(void))siphash_gettable_ctx_params }, | |
92d9d0ae | 168 | { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params }, |
4657693d RL |
169 | { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, |
170 | (void (*)(void))siphash_settable_params }, | |
92d9d0ae | 171 | { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params }, |
4657693d RL |
172 | { 0, NULL } |
173 | }; |