mirror of
https://libwebsockets.org/repo/libwebsockets
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135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* lws_genec provides an EC abstraction api in lws that works the
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* same whether you are using openssl or mbedtls crypto functions underneath.
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*/
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#include "private-lib-core.h"
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const struct lws_ec_curves *
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lws_genec_curve(const struct lws_ec_curves *table, const char *name)
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{
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const struct lws_ec_curves *c = lws_ec_curves;
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if (table)
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c = table;
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while (c->name) {
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if (!strcmp(name, c->name))
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return c;
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c++;
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}
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return NULL;
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}
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//extern const struct lws_ec_curves *lws_ec_curves;
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int
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lws_genec_confirm_curve_allowed_by_tls_id(const char *allowed, int id,
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struct lws_jwk *jwk)
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{
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struct lws_tokenize ts;
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lws_tokenize_elem e;
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size_t len;
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int n;
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lws_tokenize_init(&ts, allowed, LWS_TOKENIZE_F_COMMA_SEP_LIST |
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LWS_TOKENIZE_F_MINUS_NONTERM);
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ts.len = strlen(allowed);
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do {
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e = lws_tokenize(&ts);
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switch (e) {
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case LWS_TOKZE_TOKEN:
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n = 0;
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while (lws_ec_curves[n].name) {
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if (id != lws_ec_curves[n].tls_lib_nid) {
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n++;
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continue;
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}
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lwsl_info("match curve %s\n",
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lws_ec_curves[n].name);
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len = strlen(lws_ec_curves[n].name);
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jwk->e[LWS_GENCRYPTO_EC_KEYEL_CRV].len = (uint32_t)len;
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jwk->e[LWS_GENCRYPTO_EC_KEYEL_CRV].buf =
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lws_malloc(len + 1, "cert crv");
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if (!jwk->e[LWS_GENCRYPTO_EC_KEYEL_CRV].buf) {
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lwsl_err("%s: OOM\n", __func__);
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return 1;
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}
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memcpy(jwk->e[LWS_GENCRYPTO_EC_KEYEL_CRV].buf,
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lws_ec_curves[n].name, len + 1);
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return 0;
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}
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break;
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case LWS_TOKZE_DELIMITER:
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break;
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default: /* includes ENDED */
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lwsl_err("%s: malformed or curve name in list\n",
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__func__);
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return -1;
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}
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} while (e > 0);
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lwsl_err("%s: unsupported curve group nid %d\n", __func__, id);
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return -1;
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}
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void
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lws_genec_destroy_elements(struct lws_gencrypto_keyelem *el)
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{
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int n;
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for (n = 0; n < LWS_GENCRYPTO_EC_KEYEL_COUNT; n++)
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if (el[n].buf)
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lws_free_set_NULL(el[n].buf);
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}
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static const char *enames[] = { "crv", "x", "d", "y" };
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int
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lws_genec_dump(struct lws_gencrypto_keyelem *el)
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{
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int n;
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(void)enames;
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lwsl_info(" genec %p: crv: '%s'\n", el,
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!!el[LWS_GENCRYPTO_EC_KEYEL_CRV].buf ?
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(char *)el[LWS_GENCRYPTO_EC_KEYEL_CRV].buf: "no curve name");
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for (n = LWS_GENCRYPTO_EC_KEYEL_X; n < LWS_GENCRYPTO_EC_KEYEL_COUNT;
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n++) {
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lwsl_info(" e: %s\n", enames[n]);
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lwsl_hexdump_info(el[n].buf, el[n].len);
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}
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lwsl_info("\n");
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return 0;
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}
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