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ae0b6b92 | 1 | /* |
a28d06f3 | 2 | * Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved. |
ae0b6b92 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 | ||
23c48d94 | 10 | #include <openssl/core_dispatch.h> |
7f6b035b MC |
11 | #include <openssl/core_names.h> |
12 | #include <openssl/params.h> | |
13 | #include <openssl/evp.h> | |
14 | #include <openssl/err.h> | |
2741128e | 15 | #include <openssl/proverr.h> |
ae0b6b92 | 16 | |
25f2138b | 17 | #include "crypto/poly1305.h" |
ae0b6b92 | 18 | |
af3e7e1b | 19 | #include "prov/implementations.h" |
5b104a81 | 20 | #include "prov/providercommon.h" |
ae0b6b92 RL |
21 | |
22 | /* | |
23 | * Forward declaration of everything implemented here. This is not strictly | |
24 | * necessary for the compiler, but provides an assurance that the signatures | |
25 | * of the functions in the dispatch table are correct. | |
26 | */ | |
363b1e5d DMSP |
27 | static OSSL_FUNC_mac_newctx_fn poly1305_new; |
28 | static OSSL_FUNC_mac_dupctx_fn poly1305_dup; | |
29 | static OSSL_FUNC_mac_freectx_fn poly1305_free; | |
30 | static OSSL_FUNC_mac_gettable_params_fn poly1305_gettable_params; | |
31 | static OSSL_FUNC_mac_get_params_fn poly1305_get_params; | |
32 | static OSSL_FUNC_mac_settable_ctx_params_fn poly1305_settable_ctx_params; | |
33 | static OSSL_FUNC_mac_set_ctx_params_fn poly1305_set_ctx_params; | |
34 | static OSSL_FUNC_mac_init_fn poly1305_init; | |
35 | static OSSL_FUNC_mac_update_fn poly1305_update; | |
36 | static OSSL_FUNC_mac_final_fn poly1305_final; | |
ae0b6b92 RL |
37 | |
38 | struct poly1305_data_st { | |
39 | void *provctx; | |
c9ddc5af | 40 | int updated; |
ae0b6b92 RL |
41 | POLY1305 poly1305; /* Poly1305 data */ |
42 | }; | |
43 | ||
ae0b6b92 RL |
44 | static void *poly1305_new(void *provctx) |
45 | { | |
5b104a81 | 46 | struct poly1305_data_st *ctx; |
ae0b6b92 | 47 | |
5b104a81 P |
48 | if (!ossl_prov_is_running()) |
49 | return NULL; | |
50 | ctx = OPENSSL_zalloc(sizeof(*ctx)); | |
ebe19ab8 P |
51 | if (ctx != NULL) |
52 | ctx->provctx = provctx; | |
ae0b6b92 RL |
53 | return ctx; |
54 | } | |
55 | ||
56 | static void poly1305_free(void *vmacctx) | |
57 | { | |
58 | OPENSSL_free(vmacctx); | |
59 | } | |
60 | ||
61 | static void *poly1305_dup(void *vsrc) | |
62 | { | |
63 | struct poly1305_data_st *src = vsrc; | |
5b104a81 | 64 | struct poly1305_data_st *dst; |
ae0b6b92 | 65 | |
5b104a81 P |
66 | if (!ossl_prov_is_running()) |
67 | return NULL; | |
bbe909d0 | 68 | dst = OPENSSL_malloc(sizeof(*dst)); |
ae0b6b92 RL |
69 | if (dst == NULL) |
70 | return NULL; | |
71 | ||
bbe909d0 | 72 | *dst = *src; |
ae0b6b92 RL |
73 | return dst; |
74 | } | |
75 | ||
76 | static size_t poly1305_size(void) | |
77 | { | |
78 | return POLY1305_DIGEST_SIZE; | |
79 | } | |
80 | ||
1dfe9753 P |
81 | static int poly1305_setkey(struct poly1305_data_st *ctx, |
82 | const unsigned char *key, size_t keylen) | |
ae0b6b92 | 83 | { |
1dfe9753 P |
84 | if (keylen != POLY1305_KEY_SIZE) { |
85 | ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH); | |
86 | return 0; | |
87 | } | |
88 | Poly1305_Init(&ctx->poly1305, key); | |
bbe909d0 | 89 | ctx->updated = 0; |
1dfe9753 P |
90 | return 1; |
91 | } | |
92 | ||
93 | static int poly1305_init(void *vmacctx, const unsigned char *key, | |
94 | size_t keylen, const OSSL_PARAM params[]) | |
95 | { | |
96 | struct poly1305_data_st *ctx = vmacctx; | |
97 | ||
ae0b6b92 | 98 | /* initialize the context in MAC_ctrl function */ |
1dfe9753 P |
99 | if (!ossl_prov_is_running() || !poly1305_set_ctx_params(ctx, params)) |
100 | return 0; | |
101 | if (key != NULL) | |
102 | return poly1305_setkey(ctx, key, keylen); | |
c9ddc5af TM |
103 | /* no reinitialization of context with the same key is allowed */ |
104 | return ctx->updated == 0; | |
ae0b6b92 RL |
105 | } |
106 | ||
107 | static int poly1305_update(void *vmacctx, const unsigned char *data, | |
108 | size_t datalen) | |
109 | { | |
110 | struct poly1305_data_st *ctx = vmacctx; | |
111 | ||
c9ddc5af | 112 | ctx->updated = 1; |
0bc193dd MC |
113 | if (datalen == 0) |
114 | return 1; | |
115 | ||
ae0b6b92 RL |
116 | /* poly1305 has nothing to return in its update function */ |
117 | Poly1305_Update(&ctx->poly1305, data, datalen); | |
118 | return 1; | |
119 | } | |
120 | ||
121 | static int poly1305_final(void *vmacctx, unsigned char *out, size_t *outl, | |
122 | size_t outsize) | |
123 | { | |
124 | struct poly1305_data_st *ctx = vmacctx; | |
125 | ||
5b104a81 P |
126 | if (!ossl_prov_is_running()) |
127 | return 0; | |
c9ddc5af | 128 | ctx->updated = 1; |
ae0b6b92 | 129 | Poly1305_Final(&ctx->poly1305, out); |
5f6a0b2f | 130 | *outl = poly1305_size(); |
ae0b6b92 RL |
131 | return 1; |
132 | } | |
133 | ||
134 | static const OSSL_PARAM known_gettable_params[] = { | |
703170d4 | 135 | OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), |
ae0b6b92 RL |
136 | OSSL_PARAM_END |
137 | }; | |
af5e1e85 | 138 | static const OSSL_PARAM *poly1305_gettable_params(void *provctx) |
ae0b6b92 RL |
139 | { |
140 | return known_gettable_params; | |
141 | } | |
142 | ||
143 | static int poly1305_get_params(OSSL_PARAM params[]) | |
144 | { | |
145 | OSSL_PARAM *p; | |
146 | ||
703170d4 | 147 | if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL) |
ae0b6b92 RL |
148 | return OSSL_PARAM_set_size_t(p, poly1305_size()); |
149 | ||
150 | return 1; | |
151 | } | |
152 | ||
153 | static const OSSL_PARAM known_settable_ctx_params[] = { | |
154 | OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0), | |
155 | OSSL_PARAM_END | |
156 | }; | |
eee323c3 P |
157 | static const OSSL_PARAM *poly1305_settable_ctx_params(ossl_unused void *ctx, |
158 | ossl_unused void *provctx) | |
ae0b6b92 RL |
159 | { |
160 | return known_settable_ctx_params; | |
161 | } | |
162 | ||
92d9d0ae | 163 | static int poly1305_set_ctx_params(void *vmacctx, const OSSL_PARAM *params) |
ae0b6b92 RL |
164 | { |
165 | struct poly1305_data_st *ctx = vmacctx; | |
1dfe9753 P |
166 | const OSSL_PARAM *p; |
167 | ||
168 | if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL | |
169 | && !poly1305_setkey(ctx, p->data, p->data_size)) | |
170 | return 0; | |
ae0b6b92 RL |
171 | return 1; |
172 | } | |
173 | ||
1be63951 | 174 | const OSSL_DISPATCH ossl_poly1305_functions[] = { |
ae0b6b92 RL |
175 | { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))poly1305_new }, |
176 | { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))poly1305_dup }, | |
177 | { OSSL_FUNC_MAC_FREECTX, (void (*)(void))poly1305_free }, | |
178 | { OSSL_FUNC_MAC_INIT, (void (*)(void))poly1305_init }, | |
179 | { OSSL_FUNC_MAC_UPDATE, (void (*)(void))poly1305_update }, | |
180 | { OSSL_FUNC_MAC_FINAL, (void (*)(void))poly1305_final }, | |
181 | { OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))poly1305_gettable_params }, | |
182 | { OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))poly1305_get_params }, | |
183 | { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, | |
184 | (void (*)(void))poly1305_settable_ctx_params }, | |
92d9d0ae | 185 | { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))poly1305_set_ctx_params }, |
ae0b6b92 RL |
186 | { 0, NULL } |
187 | }; |