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-rw-r--r--src/ssl/custom_extensions.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/src/ssl/custom_extensions.c b/src/ssl/custom_extensions.c
deleted file mode 100644
index c94543d..0000000
--- a/src/ssl/custom_extensions.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
-#include <openssl/ssl.h>
-
-#include <assert.h>
-#include <string.h>
-
-#include <openssl/bytestring.h>
-#include <openssl/err.h>
-#include <openssl/mem.h>
-#include <openssl/stack.h>
-
-#include "internal.h"
-
-
-void SSL_CUSTOM_EXTENSION_free(SSL_CUSTOM_EXTENSION *custom_extension) {
- OPENSSL_free(custom_extension);
-}
-
-static const SSL_CUSTOM_EXTENSION *custom_ext_find(
- STACK_OF(SSL_CUSTOM_EXTENSION) *stack,
- unsigned *out_index, uint16_t value) {
- size_t i;
- for (i = 0; i < sk_SSL_CUSTOM_EXTENSION_num(stack); i++) {
- const SSL_CUSTOM_EXTENSION *ext = sk_SSL_CUSTOM_EXTENSION_value(stack, i);
- if (ext->value == value) {
- if (out_index != NULL) {
- *out_index = i;
- }
- return ext;
- }
- }
-
- return NULL;
-}
-
-/* default_add_callback is used as the |add_callback| when the user doesn't
- * provide one. For servers, it does nothing while, for clients, it causes an
- * empty extension to be included. */
-static int default_add_callback(SSL *ssl, unsigned extension_value,
- const uint8_t **out, size_t *out_len,
- int *out_alert_value, void *add_arg) {
- if (ssl->server) {
- return 0;
- }
- *out_len = 0;
- return 1;
-}
-
-static int custom_ext_add_hello(SSL *ssl, CBB *extensions) {
- STACK_OF(SSL_CUSTOM_EXTENSION) *stack = ssl->ctx->client_custom_extensions;
- if (ssl->server) {
- stack = ssl->ctx->server_custom_extensions;
- }
-
- if (stack == NULL) {
- return 1;
- }
-
- size_t i;
- for (i = 0; i < sk_SSL_CUSTOM_EXTENSION_num(stack); i++) {
- const SSL_CUSTOM_EXTENSION *ext = sk_SSL_CUSTOM_EXTENSION_value(stack, i);
-
- if (ssl->server &&
- !(ssl->s3->tmp.custom_extensions.received & (1u << i))) {
- /* Servers cannot echo extensions that the client didn't send. */
- continue;
- }
-
- const uint8_t *contents;
- size_t contents_len;
- int alert = SSL_AD_DECODE_ERROR;
- CBB contents_cbb;
-
- switch (ext->add_callback(ssl, ext->value, &contents, &contents_len, &alert,
- ext->add_arg)) {
- case 1:
- if (!CBB_add_u16(extensions, ext->value) ||
- !CBB_add_u16_length_prefixed(extensions, &contents_cbb) ||
- !CBB_add_bytes(&contents_cbb, contents, contents_len) ||
- !CBB_flush(extensions)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
- ERR_add_error_dataf("extension: %u", (unsigned) ext->value);
- if (ext->free_callback && 0 < contents_len) {
- ext->free_callback(ssl, ext->value, contents, ext->add_arg);
- }
- return 0;
- }
-
- if (ext->free_callback && 0 < contents_len) {
- ext->free_callback(ssl, ext->value, contents, ext->add_arg);
- }
-
- if (!ssl->server) {
- assert((ssl->s3->tmp.custom_extensions.sent & (1u << i)) == 0);
- ssl->s3->tmp.custom_extensions.sent |= (1u << i);
- }
- break;
-
- case 0:
- break;
-
- default:
- ssl3_send_alert(ssl, SSL3_AL_FATAL, alert);
- OPENSSL_PUT_ERROR(SSL, SSL_R_CUSTOM_EXTENSION_ERROR);
- ERR_add_error_dataf("extension: %u", (unsigned) ext->value);
- return 0;
- }
- }
-
- return 1;
-}
-
-int custom_ext_add_clienthello(SSL *ssl, CBB *extensions) {
- return custom_ext_add_hello(ssl, extensions);
-}
-
-int custom_ext_parse_serverhello(SSL *ssl, int *out_alert, uint16_t value,
- const CBS *extension) {
- unsigned index;
- const SSL_CUSTOM_EXTENSION *ext =
- custom_ext_find(ssl->ctx->client_custom_extensions, &index, value);
-
- if (/* Unknown extensions are not allowed in a ServerHello. */
- ext == NULL ||
- /* Also, if we didn't send the extension, that's also unacceptable. */
- !(ssl->s3->tmp.custom_extensions.sent & (1u << index))) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION);
- ERR_add_error_dataf("extension: %u", (unsigned)value);
- *out_alert = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- if (ext->parse_callback != NULL &&
- !ext->parse_callback(ssl, value, CBS_data(extension), CBS_len(extension),
- out_alert, ext->parse_arg)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_CUSTOM_EXTENSION_ERROR);
- ERR_add_error_dataf("extension: %u", (unsigned)ext->value);
- return 0;
- }
-
- return 1;
-}
-
-int custom_ext_parse_clienthello(SSL *ssl, int *out_alert, uint16_t value,
- const CBS *extension) {
- unsigned index;
- const SSL_CUSTOM_EXTENSION *ext =
- custom_ext_find(ssl->ctx->server_custom_extensions, &index, value);
-
- if (ext == NULL) {
- return 1;
- }
-
- assert((ssl->s3->tmp.custom_extensions.received & (1u << index)) == 0);
- ssl->s3->tmp.custom_extensions.received |= (1u << index);
-
- if (ext->parse_callback &&
- !ext->parse_callback(ssl, value, CBS_data(extension), CBS_len(extension),
- out_alert, ext->parse_arg)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_CUSTOM_EXTENSION_ERROR);
- ERR_add_error_dataf("extension: %u", (unsigned)ext->value);
- return 0;
- }
-
- return 1;
-}
-
-int custom_ext_add_serverhello(SSL *ssl, CBB *extensions) {
- return custom_ext_add_hello(ssl, extensions);
-}
-
-/* MAX_NUM_CUSTOM_EXTENSIONS is the maximum number of custom extensions that
- * can be set on an |SSL_CTX|. It's determined by the size of the bitset used
- * to track when an extension has been sent. */
-#define MAX_NUM_CUSTOM_EXTENSIONS \
- (sizeof(((struct ssl3_state_st *)NULL)->tmp.custom_extensions.sent) * 8)
-
-static int custom_ext_append(STACK_OF(SSL_CUSTOM_EXTENSION) **stack,
- unsigned extension_value,
- SSL_custom_ext_add_cb add_cb,
- SSL_custom_ext_free_cb free_cb, void *add_arg,
- SSL_custom_ext_parse_cb parse_cb,
- void *parse_arg) {
- if (add_cb == NULL ||
- 0xffff < extension_value ||
- SSL_extension_supported(extension_value) ||
- /* Specifying a free callback without an add callback is nonsensical
- * and an error. */
- (*stack != NULL &&
- (MAX_NUM_CUSTOM_EXTENSIONS <= sk_SSL_CUSTOM_EXTENSION_num(*stack) ||
- custom_ext_find(*stack, NULL, extension_value) != NULL))) {
- return 0;
- }
-
- SSL_CUSTOM_EXTENSION *ext = OPENSSL_malloc(sizeof(SSL_CUSTOM_EXTENSION));
- if (ext == NULL) {
- return 0;
- }
- ext->add_callback = add_cb;
- ext->add_arg = add_arg;
- ext->free_callback = free_cb;
- ext->parse_callback = parse_cb;
- ext->parse_arg = parse_arg;
- ext->value = extension_value;
-
- if (*stack == NULL) {
- *stack = sk_SSL_CUSTOM_EXTENSION_new_null();
- if (*stack == NULL) {
- SSL_CUSTOM_EXTENSION_free(ext);
- return 0;
- }
- }
-
- if (!sk_SSL_CUSTOM_EXTENSION_push(*stack, ext)) {
- SSL_CUSTOM_EXTENSION_free(ext);
- if (sk_SSL_CUSTOM_EXTENSION_num(*stack) == 0) {
- sk_SSL_CUSTOM_EXTENSION_free(*stack);
- *stack = NULL;
- }
- return 0;
- }
-
- return 1;
-}
-
-int SSL_CTX_add_client_custom_ext(SSL_CTX *ctx, unsigned extension_value,
- SSL_custom_ext_add_cb add_cb,
- SSL_custom_ext_free_cb free_cb, void *add_arg,
- SSL_custom_ext_parse_cb parse_cb,
- void *parse_arg) {
- return custom_ext_append(&ctx->client_custom_extensions, extension_value,
- add_cb ? add_cb : default_add_callback, free_cb,
- add_arg, parse_cb, parse_arg);
-}
-
-int SSL_CTX_add_server_custom_ext(SSL_CTX *ctx, unsigned extension_value,
- SSL_custom_ext_add_cb add_cb,
- SSL_custom_ext_free_cb free_cb, void *add_arg,
- SSL_custom_ext_parse_cb parse_cb,
- void *parse_arg) {
- return custom_ext_append(&ctx->server_custom_extensions, extension_value,
- add_cb ? add_cb : default_add_callback, free_cb,
- add_arg, parse_cb, parse_arg);
-}
generated by cgit v1.1 at 2024-12-22 09:11:26 +0000