82c9e90a58
This makes SSLv23_method go through DTLS_ANY_VERSION's version negotiation logic. This allows us to get rid of duplicate ClientHello logic. For compatibility, SSL_METHOD is now split into SSL_PROTOCOL_METHOD and a version. The legacy version-locked methods set min_version and max_version based this version field to emulate the original semantics. As a bonus, we can now handle fragmented ClientHello versions now. Because SSLv23_method is a silly name, deprecate that too and introduce TLS_method. Change-Id: I8b3df2b427ae34c44ecf972f466ad64dc3dbb171
457 lines
15 KiB
C
457 lines
15 KiB
C
/* Copyright (c) 2014, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <stdio.h>
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#include <string.h>
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#include <openssl/base64.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/ssl.h>
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typedef struct {
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int id;
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int in_group_flag;
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} EXPECTED_CIPHER;
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typedef struct {
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/* The rule string to apply. */
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const char *rule;
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/* The list of expected ciphers, in order, terminated with -1. */
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const EXPECTED_CIPHER *expected;
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} CIPHER_TEST;
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/* Selecting individual ciphers should work. */
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static const char kRule1[] =
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"ECDHE-ECDSA-CHACHA20-POLY1305:"
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"ECDHE-RSA-CHACHA20-POLY1305:"
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"ECDHE-ECDSA-AES128-GCM-SHA256:"
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"ECDHE-RSA-AES128-GCM-SHA256";
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static const EXPECTED_CIPHER kExpected1[] = {
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{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* + reorders selected ciphers to the end, keeping their relative
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* order. */
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static const char kRule2[] =
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"ECDHE-ECDSA-CHACHA20-POLY1305:"
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"ECDHE-RSA-CHACHA20-POLY1305:"
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"ECDHE-ECDSA-AES128-GCM-SHA256:"
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"ECDHE-RSA-AES128-GCM-SHA256:"
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"+aRSA";
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static const EXPECTED_CIPHER kExpected2[] = {
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{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
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{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* ! banishes ciphers from future selections. */
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static const char kRule3[] =
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"!aRSA:"
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"ECDHE-ECDSA-CHACHA20-POLY1305:"
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"ECDHE-RSA-CHACHA20-POLY1305:"
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"ECDHE-ECDSA-AES128-GCM-SHA256:"
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"ECDHE-RSA-AES128-GCM-SHA256";
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static const EXPECTED_CIPHER kExpected3[] = {
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{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* Multiple masks can be ANDed in a single rule. */
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static const char kRule4[] = "kRSA+AESGCM+AES128";
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static const EXPECTED_CIPHER kExpected4[] = {
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{ TLS1_CK_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* - removes selected ciphers, but preserves their order for future
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* selections. Select AES_128_GCM, but order the key exchanges RSA,
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* DHE_RSA, ECDHE_RSA. */
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static const char kRule5[] =
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"ALL:-kEECDH:-kEDH:-kRSA:-ALL:"
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"AESGCM+AES128+aRSA";
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static const EXPECTED_CIPHER kExpected5[] = {
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{ TLS1_CK_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ TLS1_CK_DHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* Unknown selectors are no-ops. */
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static const char kRule6[] =
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"ECDHE-ECDSA-CHACHA20-POLY1305:"
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"ECDHE-RSA-CHACHA20-POLY1305:"
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"ECDHE-ECDSA-AES128-GCM-SHA256:"
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"ECDHE-RSA-AES128-GCM-SHA256:"
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"BOGUS1:-BOGUS2:+BOGUS3:!BOGUS4";
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static const EXPECTED_CIPHER kExpected6[] = {
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{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* Square brackets specify equi-preference groups. */
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static const char kRule7[] =
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"[ECDHE-ECDSA-CHACHA20-POLY1305|ECDHE-ECDSA-AES128-GCM-SHA256]:"
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"[ECDHE-RSA-CHACHA20-POLY1305]:"
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"ECDHE-RSA-AES128-GCM-SHA256";
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static const EXPECTED_CIPHER kExpected7[] = {
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{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 1 },
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{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
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{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
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{ -1, -1 },
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};
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/* @STRENGTH performs a stable strength-sort of the selected
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* ciphers and only the selected ciphers. */
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static const char kRule8[] =
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/* To simplify things, banish all but {ECDHE_RSA,RSA} x
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* {CHACHA20,AES_256_CBC,AES_128_CBC,RC4} x SHA1. */
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"!kEDH:!AESGCM:!3DES:!SHA256:!MD5:!SHA384:"
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/* Order some ciphers backwards by strength. */
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"ALL:-CHACHA20:-AES256:-AES128:-RC4:-ALL:"
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/* Select ECDHE ones and sort them by strength. Ties should resolve
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* based on the order above. */
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"kEECDH:@STRENGTH:-ALL:"
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/* Now bring back everything uses RSA. ECDHE_RSA should be first,
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* sorted by strength. Then RSA, backwards by strength. */
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"aRSA";
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static const EXPECTED_CIPHER kExpected8[] = {
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{ TLS1_CK_ECDHE_RSA_WITH_AES_256_CBC_SHA, 0 },
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{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_RC4_128_SHA, 0 },
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{ TLS1_CK_ECDHE_RSA_WITH_AES_128_CBC_SHA, 0 },
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{ SSL3_CK_RSA_RC4_128_SHA, 0 },
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{ TLS1_CK_RSA_WITH_AES_128_SHA, 0 },
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{ TLS1_CK_RSA_WITH_AES_256_SHA, 0 },
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{ -1, -1 },
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};
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static CIPHER_TEST kCipherTests[] = {
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{ kRule1, kExpected1 },
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{ kRule2, kExpected2 },
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{ kRule3, kExpected3 },
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{ kRule4, kExpected4 },
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{ kRule5, kExpected5 },
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{ kRule6, kExpected6 },
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{ kRule7, kExpected7 },
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{ kRule8, kExpected8 },
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{ NULL, NULL },
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};
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static const char *kBadRules[] = {
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/* Invalid brackets. */
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"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256",
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"RSA]",
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"[[RSA]]",
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/* Operators inside brackets */
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"[+RSA]",
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/* Unknown directive. */
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"@BOGUS",
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/* Empty cipher lists error at SSL_CTX_set_cipher_list. */
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"",
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"BOGUS",
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/* Invalid command. */
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"?BAR",
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/* Special operators are not allowed if groups are used. */
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"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:+FOO",
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"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:!FOO",
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"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:-FOO",
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"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:@STRENGTH",
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NULL,
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};
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static void print_cipher_preference_list(
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struct ssl_cipher_preference_list_st *list) {
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size_t i;
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int in_group = 0;
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for (i = 0; i < sk_SSL_CIPHER_num(list->ciphers); i++) {
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const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(list->ciphers, i);
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if (!in_group && list->in_group_flags[i]) {
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fprintf(stderr, "\t[\n");
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in_group = 1;
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}
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fprintf(stderr, "\t");
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if (in_group) {
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fprintf(stderr, " ");
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}
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fprintf(stderr, "%s\n", SSL_CIPHER_get_name(cipher));
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if (in_group && !list->in_group_flags[i]) {
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fprintf(stderr, "\t]\n");
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in_group = 0;
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}
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}
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}
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static int test_cipher_rule(CIPHER_TEST *t) {
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int ret = 0;
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SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
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size_t i;
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if (!SSL_CTX_set_cipher_list(ctx, t->rule)) {
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fprintf(stderr, "Error testing cipher rule '%s'\n", t->rule);
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BIO_print_errors_fp(stderr);
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goto done;
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}
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/* Compare the two lists. */
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for (i = 0; i < sk_SSL_CIPHER_num(ctx->cipher_list->ciphers); i++) {
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const SSL_CIPHER *cipher =
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sk_SSL_CIPHER_value(ctx->cipher_list->ciphers, i);
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if (t->expected[i].id != SSL_CIPHER_get_id(cipher) ||
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t->expected[i].in_group_flag != ctx->cipher_list->in_group_flags[i]) {
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fprintf(stderr, "Error: cipher rule '%s' evaluted to:\n", t->rule);
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print_cipher_preference_list(ctx->cipher_list);
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goto done;
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}
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}
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if (t->expected[i].id != -1) {
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fprintf(stderr, "Error: cipher rule '%s' evaluted to:\n", t->rule);
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print_cipher_preference_list(ctx->cipher_list);
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goto done;
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}
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ret = 1;
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done:
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SSL_CTX_free(ctx);
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return ret;
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}
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static int test_cipher_rules(void) {
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size_t i;
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for (i = 0; kCipherTests[i].rule != NULL; i++) {
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if (!test_cipher_rule(&kCipherTests[i])) {
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return 0;
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}
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}
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for (i = 0; kBadRules[i] != NULL; i++) {
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SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
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if (SSL_CTX_set_cipher_list(ctx, kBadRules[i])) {
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fprintf(stderr, "Cipher rule '%s' unexpectedly succeeded\n", kBadRules[i]);
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return 0;
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}
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ERR_clear_error();
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SSL_CTX_free(ctx);
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}
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return 1;
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}
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/* kOpenSSLSession is a serialized SSL_SESSION generated from openssl
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* s_client -sess_out. */
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static const char kOpenSSLSession[] =
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"MIIFpQIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
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"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
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"IWoJoQYCBFRDO46iBAICASyjggR6MIIEdjCCA16gAwIBAgIIK9dUvsPWSlUwDQYJ"
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"KoZIhvcNAQEFBQAwSTELMAkGA1UEBhMCVVMxEzARBgNVBAoTCkdvb2dsZSBJbmMx"
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"JTAjBgNVBAMTHEdvb2dsZSBJbnRlcm5ldCBBdXRob3JpdHkgRzIwHhcNMTQxMDA4"
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"MTIwNzU3WhcNMTUwMTA2MDAwMDAwWjBoMQswCQYDVQQGEwJVUzETMBEGA1UECAwK"
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"Q2FsaWZvcm5pYTEWMBQGA1UEBwwNTW91bnRhaW4gVmlldzETMBEGA1UECgwKR29v"
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"Z2xlIEluYzEXMBUGA1UEAwwOd3d3Lmdvb2dsZS5jb20wggEiMA0GCSqGSIb3DQEB"
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"AQUAA4IBDwAwggEKAoIBAQCcKeLrplAC+Lofy8t/wDwtB6eu72CVp0cJ4V3lknN6"
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"huH9ct6FFk70oRIh/VBNBBz900jYy+7111Jm1b8iqOTQ9aT5C7SEhNcQFJvqzH3e"
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"MPkb6ZSWGm1yGF7MCQTGQXF20Sk/O16FSjAynU/b3oJmOctcycWYkY0ytS/k3LBu"
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"Id45PJaoMqjB0WypqvNeJHC3q5JjCB4RP7Nfx5jjHSrCMhw8lUMW4EaDxjaR9KDh"
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"PLgjsk+LDIySRSRDaCQGhEOWLJZVLzLo4N6/UlctCHEllpBUSvEOyFga52qroGjg"
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"rf3WOQ925MFwzd6AK+Ich0gDRg8sQfdLH5OuP1cfLfU1AgMBAAGjggFBMIIBPTAd"
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"BgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwGQYDVR0RBBIwEIIOd3d3Lmdv"
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"b2dsZS5jb20waAYIKwYBBQUHAQEEXDBaMCsGCCsGAQUFBzAChh9odHRwOi8vcGtp"
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"Lmdvb2dsZS5jb20vR0lBRzIuY3J0MCsGCCsGAQUFBzABhh9odHRwOi8vY2xpZW50"
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"czEuZ29vZ2xlLmNvbS9vY3NwMB0GA1UdDgQWBBQ7a+CcxsZByOpc+xpYFcIbnUMZ"
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"hTAMBgNVHRMBAf8EAjAAMB8GA1UdIwQYMBaAFErdBhYbvPZotXb1gba7Yhq6WoEv"
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"MBcGA1UdIAQQMA4wDAYKKwYBBAHWeQIFATAwBgNVHR8EKTAnMCWgI6Ahhh9odHRw"
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"Oi8vcGtpLmdvb2dsZS5jb20vR0lBRzIuY3JsMA0GCSqGSIb3DQEBBQUAA4IBAQCa"
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"OXCBdoqUy5bxyq+Wrh1zsyyCFim1PH5VU2+yvDSWrgDY8ibRGJmfff3r4Lud5kal"
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"dKs9k8YlKD3ITG7P0YT/Rk8hLgfEuLcq5cc0xqmE42xJ+Eo2uzq9rYorc5emMCxf"
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"5L0TJOXZqHQpOEcuptZQ4OjdYMfSxk5UzueUhA3ogZKRcRkdB3WeWRp+nYRhx4St"
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"o2rt2A0MKmY9165GHUqMK9YaaXHDXqBu7Sefr1uSoAP9gyIJKeihMivsGqJ1TD6Z"
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"cc6LMe+dN2P8cZEQHtD1y296ul4Mivqk3jatUVL8/hCwgch9A8O4PGZq9WqBfEWm"
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"IyHh1dPtbg1lOXdYCWtjpAIEAKUDAgEUqQUCAwGJwKqBpwSBpBwUQvoeOk0Kg36S"
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"YTcLEkXqKwOBfF9vE4KX0NxeLwjcDTpsuh3qXEaZ992r1N38VDcyS6P7I6HBYN9B"
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"sNHM362zZnY27GpTw+Kwd751CLoXFPoaMOe57dbBpXoro6Pd3BTbf/Tzr88K06yE"
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"OTDKPNj3+inbMaVigtK4PLyPq+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdA"
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"i4gv7Y5oliyn";
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/* kCustomSession is a custom serialized SSL_SESSION generated by
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* filling in missing fields from |kOpenSSLSession|. This includes
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* providing |peer_sha256|, so |peer| is not serialized. */
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static const char kCustomSession[] =
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"MIIBdgIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
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"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
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"IWoJoQYCBFRDO46iBAICASykAwQBAqUDAgEUphAEDnd3dy5nb29nbGUuY29tqAcE"
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"BXdvcmxkqQUCAwGJwKqBpwSBpBwUQvoeOk0Kg36SYTcLEkXqKwOBfF9vE4KX0Nxe"
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"LwjcDTpsuh3qXEaZ992r1N38VDcyS6P7I6HBYN9BsNHM362zZnY27GpTw+Kwd751"
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"CLoXFPoaMOe57dbBpXoro6Pd3BTbf/Tzr88K06yEOTDKPNj3+inbMaVigtK4PLyP"
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"q+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdAi4gv7Y5oliynrSIEIAYGBgYG"
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"BgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGrgMEAQevAwQBBLADBAEF";
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static int decode_base64(uint8_t **out, size_t *out_len, const char *in) {
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size_t len;
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if (!EVP_DecodedLength(&len, strlen(in))) {
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fprintf(stderr, "EVP_DecodedLength failed\n");
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return 0;
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}
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*out = OPENSSL_malloc(len);
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if (*out == NULL) {
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fprintf(stderr, "malloc failed\n");
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return 0;
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}
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if (!EVP_DecodeBase64(*out, out_len, len, (const uint8_t *)in,
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strlen(in))) {
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fprintf(stderr, "EVP_DecodeBase64 failed\n");
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OPENSSL_free(*out);
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*out = NULL;
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return 0;
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}
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return 1;
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}
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static int test_ssl_session_asn1(const char *input_b64) {
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int ret = 0, len;
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size_t input_len, encoded_len;
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uint8_t *input = NULL, *encoded = NULL;
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const uint8_t *cptr;
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uint8_t *ptr;
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SSL_SESSION *session = NULL;
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/* Decode the input. */
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if (!decode_base64(&input, &input_len, input_b64)) {
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goto done;
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}
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/* Verify the SSL_SESSION decodes. */
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cptr = input;
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session = d2i_SSL_SESSION(NULL, &cptr, input_len);
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if (session == NULL || cptr != input + input_len) {
|
|
fprintf(stderr, "d2i_SSL_SESSION failed\n");
|
|
goto done;
|
|
}
|
|
|
|
/* Verify the SSL_SESSION encoding round-trips. */
|
|
if (!SSL_SESSION_to_bytes(session, &encoded, &encoded_len)) {
|
|
fprintf(stderr, "SSL_SESSION_to_bytes failed\n");
|
|
goto done;
|
|
}
|
|
if (encoded_len != input_len ||
|
|
memcmp(input, encoded, input_len) != 0) {
|
|
fprintf(stderr, "SSL_SESSION_to_bytes did not round-trip\n");
|
|
goto done;
|
|
}
|
|
OPENSSL_free(encoded);
|
|
encoded = NULL;
|
|
|
|
/* Verify the SSL_SESSION encoding round-trips via the legacy API. */
|
|
len = i2d_SSL_SESSION(session, NULL);
|
|
if (len < 0 || (size_t)len != input_len) {
|
|
fprintf(stderr, "i2d_SSL_SESSION(NULL) returned invalid length\n");
|
|
goto done;
|
|
}
|
|
|
|
encoded = OPENSSL_malloc(input_len);
|
|
if (encoded == NULL) {
|
|
fprintf(stderr, "malloc failed\n");
|
|
goto done;
|
|
}
|
|
ptr = encoded;
|
|
len = i2d_SSL_SESSION(session, &ptr);
|
|
if (len < 0 || (size_t)len != input_len) {
|
|
fprintf(stderr, "i2d_SSL_SESSION returned invalid length\n");
|
|
goto done;
|
|
}
|
|
if (ptr != encoded + input_len) {
|
|
fprintf(stderr, "i2d_SSL_SESSION did not advance ptr correctly\n");
|
|
goto done;
|
|
}
|
|
if (memcmp(input, encoded, input_len) != 0) {
|
|
fprintf(stderr, "i2d_SSL_SESSION did not round-trip\n");
|
|
goto done;
|
|
}
|
|
|
|
ret = 1;
|
|
|
|
done:
|
|
if (!ret) {
|
|
BIO_print_errors_fp(stderr);
|
|
}
|
|
|
|
if (session) {
|
|
SSL_SESSION_free(session);
|
|
}
|
|
if (input) {
|
|
OPENSSL_free(input);
|
|
}
|
|
if (encoded) {
|
|
OPENSSL_free(encoded);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int test_default_version(uint16_t version, const SSL_METHOD *(*method)(void)) {
|
|
SSL_CTX *ctx;
|
|
int ret;
|
|
|
|
ctx = SSL_CTX_new(method());
|
|
if (ctx == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
ret = ctx->min_version == version && ctx->max_version == version;
|
|
SSL_CTX_free(ctx);
|
|
return ret;
|
|
}
|
|
|
|
int main(void) {
|
|
SSL_library_init();
|
|
|
|
if (!test_cipher_rules() ||
|
|
!test_ssl_session_asn1(kOpenSSLSession) ||
|
|
!test_ssl_session_asn1(kCustomSession) ||
|
|
!test_default_version(0, &TLS_method) ||
|
|
!test_default_version(SSL3_VERSION, &SSLv3_method) ||
|
|
!test_default_version(TLS1_VERSION, &TLSv1_method) ||
|
|
!test_default_version(TLS1_1_VERSION, &TLSv1_1_method) ||
|
|
!test_default_version(TLS1_2_VERSION, &TLSv1_2_method) ||
|
|
!test_default_version(0, &DTLS_method) ||
|
|
!test_default_version(DTLS1_VERSION, &DTLSv1_method) ||
|
|
!test_default_version(DTLS1_2_VERSION, &DTLSv1_2_method)) {
|
|
return 1;
|
|
}
|
|
|
|
printf("PASS\n");
|
|
return 0;
|
|
}
|