blob: 70291a299938c1bc1927409c41b7898fac26d1aa [file] [log] [blame]
/* 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 <stdio.h>
#include <string.h>
#include <openssl/base64.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
typedef struct {
int id;
int in_group_flag;
} EXPECTED_CIPHER;
typedef struct {
/* The rule string to apply. */
const char *rule;
/* The list of expected ciphers, in order, terminated with -1. */
const EXPECTED_CIPHER *expected;
} CIPHER_TEST;
/* Selecting individual ciphers should work. */
static const char kRule1[] =
"ECDHE-ECDSA-CHACHA20-POLY1305:"
"ECDHE-RSA-CHACHA20-POLY1305:"
"ECDHE-ECDSA-AES128-GCM-SHA256:"
"ECDHE-RSA-AES128-GCM-SHA256";
static const EXPECTED_CIPHER kExpected1[] = {
{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* + reorders selected ciphers to the end, keeping their relative
* order. */
static const char kRule2[] =
"ECDHE-ECDSA-CHACHA20-POLY1305:"
"ECDHE-RSA-CHACHA20-POLY1305:"
"ECDHE-ECDSA-AES128-GCM-SHA256:"
"ECDHE-RSA-AES128-GCM-SHA256:"
"+aRSA";
static const EXPECTED_CIPHER kExpected2[] = {
{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* ! banishes ciphers from future selections. */
static const char kRule3[] =
"!aRSA:"
"ECDHE-ECDSA-CHACHA20-POLY1305:"
"ECDHE-RSA-CHACHA20-POLY1305:"
"ECDHE-ECDSA-AES128-GCM-SHA256:"
"ECDHE-RSA-AES128-GCM-SHA256";
static const EXPECTED_CIPHER kExpected3[] = {
{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* Multiple masks can be ANDed in a single rule. */
static const char kRule4[] = "kRSA+AESGCM+AES128";
static const EXPECTED_CIPHER kExpected4[] = {
{ TLS1_CK_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* - removes selected ciphers, but preserves their order for future
* selections. Select AES_128_GCM, but order the key exchanges RSA,
* DHE_RSA, ECDHE_RSA. */
static const char kRule5[] =
"ALL:-kEECDH:-kEDH:-kRSA:-ALL:"
"AESGCM+AES128+aRSA";
static const EXPECTED_CIPHER kExpected5[] = {
{ TLS1_CK_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ TLS1_CK_DHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* Unknown selectors are no-ops. */
static const char kRule6[] =
"ECDHE-ECDSA-CHACHA20-POLY1305:"
"ECDHE-RSA-CHACHA20-POLY1305:"
"ECDHE-ECDSA-AES128-GCM-SHA256:"
"ECDHE-RSA-AES128-GCM-SHA256:"
"BOGUS1:-BOGUS2:+BOGUS3:!BOGUS4";
static const EXPECTED_CIPHER kExpected6[] = {
{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* Square brackets specify equi-preference groups. */
static const char kRule7[] =
"[ECDHE-ECDSA-CHACHA20-POLY1305|ECDHE-ECDSA-AES128-GCM-SHA256]:"
"[ECDHE-RSA-CHACHA20-POLY1305]:"
"ECDHE-RSA-AES128-GCM-SHA256";
static const EXPECTED_CIPHER kExpected7[] = {
{ TLS1_CK_ECDHE_ECDSA_CHACHA20_POLY1305, 1 },
{ TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0 },
{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 0 },
{ -1, -1 },
};
/* @STRENGTH performs a stable strength-sort of the selected
* ciphers and only the selected ciphers. */
static const char kRule8[] =
/* To simplify things, banish all but {ECDHE_RSA,RSA} x
* {CHACHA20,AES_256_CBC,AES_128_CBC,RC4} x SHA1. */
"!kEDH:!AESGCM:!3DES:!SHA256:!MD5:!SHA384:"
/* Order some ciphers backwards by strength. */
"ALL:-CHACHA20:-AES256:-AES128:-RC4:-ALL:"
/* Select ECDHE ones and sort them by strength. Ties should resolve
* based on the order above. */
"kEECDH:@STRENGTH:-ALL:"
/* Now bring back everything uses RSA. ECDHE_RSA should be first,
* sorted by strength. Then RSA, backwards by strength. */
"aRSA";
static const EXPECTED_CIPHER kExpected8[] = {
{ TLS1_CK_ECDHE_RSA_WITH_AES_256_CBC_SHA, 0 },
{ TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_RC4_128_SHA, 0 },
{ TLS1_CK_ECDHE_RSA_WITH_AES_128_CBC_SHA, 0 },
{ SSL3_CK_RSA_RC4_128_SHA, 0 },
{ TLS1_CK_RSA_WITH_AES_128_SHA, 0 },
{ TLS1_CK_RSA_WITH_AES_256_SHA, 0 },
{ -1, -1 },
};
static CIPHER_TEST kCipherTests[] = {
{ kRule1, kExpected1 },
{ kRule2, kExpected2 },
{ kRule3, kExpected3 },
{ kRule4, kExpected4 },
{ kRule5, kExpected5 },
{ kRule6, kExpected6 },
{ kRule7, kExpected7 },
{ kRule8, kExpected8 },
{ NULL, NULL },
};
static const char *kBadRules[] = {
/* Invalid brackets. */
"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256",
"RSA]",
"[[RSA]]",
/* Operators inside brackets */
"[+RSA]",
/* Unknown directive. */
"@BOGUS",
/* Empty cipher lists error at SSL_CTX_set_cipher_list. */
"",
"BOGUS",
/* Invalid command. */
"?BAR",
/* Special operators are not allowed if groups are used. */
"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:+FOO",
"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:!FOO",
"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:-FOO",
"[ECDHE-RSA-CHACHA20-POLY1305|ECDHE-RSA-AES128-GCM-SHA256]:@STRENGTH",
NULL,
};
static void print_cipher_preference_list(
struct ssl_cipher_preference_list_st *list) {
size_t i;
int in_group = 0;
for (i = 0; i < sk_SSL_CIPHER_num(list->ciphers); i++) {
const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(list->ciphers, i);
if (!in_group && list->in_group_flags[i]) {
fprintf(stderr, "\t[\n");
in_group = 1;
}
fprintf(stderr, "\t");
if (in_group) {
fprintf(stderr, " ");
}
fprintf(stderr, "%s\n", SSL_CIPHER_get_name(cipher));
if (in_group && !list->in_group_flags[i]) {
fprintf(stderr, "\t]\n");
in_group = 0;
}
}
}
static int test_cipher_rule(CIPHER_TEST *t) {
int ret = 0;
SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
size_t i;
if (!SSL_CTX_set_cipher_list(ctx, t->rule)) {
fprintf(stderr, "Error testing cipher rule '%s'\n", t->rule);
BIO_print_errors_fp(stderr);
goto done;
}
/* Compare the two lists. */
for (i = 0; i < sk_SSL_CIPHER_num(ctx->cipher_list->ciphers); i++) {
const SSL_CIPHER *cipher =
sk_SSL_CIPHER_value(ctx->cipher_list->ciphers, i);
if (t->expected[i].id != SSL_CIPHER_get_id(cipher) ||
t->expected[i].in_group_flag != ctx->cipher_list->in_group_flags[i]) {
fprintf(stderr, "Error: cipher rule '%s' evaluted to:\n", t->rule);
print_cipher_preference_list(ctx->cipher_list);
goto done;
}
}
if (t->expected[i].id != -1) {
fprintf(stderr, "Error: cipher rule '%s' evaluted to:\n", t->rule);
print_cipher_preference_list(ctx->cipher_list);
goto done;
}
ret = 1;
done:
SSL_CTX_free(ctx);
return ret;
}
static int test_cipher_rules(void) {
size_t i;
for (i = 0; kCipherTests[i].rule != NULL; i++) {
if (!test_cipher_rule(&kCipherTests[i])) {
return 0;
}
}
for (i = 0; kBadRules[i] != NULL; i++) {
SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
if (SSL_CTX_set_cipher_list(ctx, kBadRules[i])) {
fprintf(stderr, "Cipher rule '%s' unexpectedly succeeded\n", kBadRules[i]);
return 0;
}
ERR_clear_error();
SSL_CTX_free(ctx);
}
return 1;
}
/* kOpenSSLSession is a serialized SSL_SESSION generated from openssl
* s_client -sess_out. */
static const char kOpenSSLSession[] =
"MIIFpQIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
"IWoJoQYCBFRDO46iBAICASyjggR6MIIEdjCCA16gAwIBAgIIK9dUvsPWSlUwDQYJ"
"KoZIhvcNAQEFBQAwSTELMAkGA1UEBhMCVVMxEzARBgNVBAoTCkdvb2dsZSBJbmMx"
"JTAjBgNVBAMTHEdvb2dsZSBJbnRlcm5ldCBBdXRob3JpdHkgRzIwHhcNMTQxMDA4"
"MTIwNzU3WhcNMTUwMTA2MDAwMDAwWjBoMQswCQYDVQQGEwJVUzETMBEGA1UECAwK"
"Q2FsaWZvcm5pYTEWMBQGA1UEBwwNTW91bnRhaW4gVmlldzETMBEGA1UECgwKR29v"
"Z2xlIEluYzEXMBUGA1UEAwwOd3d3Lmdvb2dsZS5jb20wggEiMA0GCSqGSIb3DQEB"
"AQUAA4IBDwAwggEKAoIBAQCcKeLrplAC+Lofy8t/wDwtB6eu72CVp0cJ4V3lknN6"
"huH9ct6FFk70oRIh/VBNBBz900jYy+7111Jm1b8iqOTQ9aT5C7SEhNcQFJvqzH3e"
"MPkb6ZSWGm1yGF7MCQTGQXF20Sk/O16FSjAynU/b3oJmOctcycWYkY0ytS/k3LBu"
"Id45PJaoMqjB0WypqvNeJHC3q5JjCB4RP7Nfx5jjHSrCMhw8lUMW4EaDxjaR9KDh"
"PLgjsk+LDIySRSRDaCQGhEOWLJZVLzLo4N6/UlctCHEllpBUSvEOyFga52qroGjg"
"rf3WOQ925MFwzd6AK+Ich0gDRg8sQfdLH5OuP1cfLfU1AgMBAAGjggFBMIIBPTAd"
"BgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwGQYDVR0RBBIwEIIOd3d3Lmdv"
"b2dsZS5jb20waAYIKwYBBQUHAQEEXDBaMCsGCCsGAQUFBzAChh9odHRwOi8vcGtp"
"Lmdvb2dsZS5jb20vR0lBRzIuY3J0MCsGCCsGAQUFBzABhh9odHRwOi8vY2xpZW50"
"czEuZ29vZ2xlLmNvbS9vY3NwMB0GA1UdDgQWBBQ7a+CcxsZByOpc+xpYFcIbnUMZ"
"hTAMBgNVHRMBAf8EAjAAMB8GA1UdIwQYMBaAFErdBhYbvPZotXb1gba7Yhq6WoEv"
"MBcGA1UdIAQQMA4wDAYKKwYBBAHWeQIFATAwBgNVHR8EKTAnMCWgI6Ahhh9odHRw"
"Oi8vcGtpLmdvb2dsZS5jb20vR0lBRzIuY3JsMA0GCSqGSIb3DQEBBQUAA4IBAQCa"
"OXCBdoqUy5bxyq+Wrh1zsyyCFim1PH5VU2+yvDSWrgDY8ibRGJmfff3r4Lud5kal"
"dKs9k8YlKD3ITG7P0YT/Rk8hLgfEuLcq5cc0xqmE42xJ+Eo2uzq9rYorc5emMCxf"
"5L0TJOXZqHQpOEcuptZQ4OjdYMfSxk5UzueUhA3ogZKRcRkdB3WeWRp+nYRhx4St"
"o2rt2A0MKmY9165GHUqMK9YaaXHDXqBu7Sefr1uSoAP9gyIJKeihMivsGqJ1TD6Z"
"cc6LMe+dN2P8cZEQHtD1y296ul4Mivqk3jatUVL8/hCwgch9A8O4PGZq9WqBfEWm"
"IyHh1dPtbg1lOXdYCWtjpAIEAKUDAgEUqQUCAwGJwKqBpwSBpBwUQvoeOk0Kg36S"
"YTcLEkXqKwOBfF9vE4KX0NxeLwjcDTpsuh3qXEaZ992r1N38VDcyS6P7I6HBYN9B"
"sNHM362zZnY27GpTw+Kwd751CLoXFPoaMOe57dbBpXoro6Pd3BTbf/Tzr88K06yE"
"OTDKPNj3+inbMaVigtK4PLyPq+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdA"
"i4gv7Y5oliyn";
/* kCustomSession is a custom serialized SSL_SESSION generated by
* filling in missing fields from |kOpenSSLSession|. This includes
* providing |peer_sha256|, so |peer| is not serialized. */
static const char kCustomSession[] =
"MIIBdgIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
"IWoJoQYCBFRDO46iBAICASykAwQBAqUDAgEUphAEDnd3dy5nb29nbGUuY29tqAcE"
"BXdvcmxkqQUCAwGJwKqBpwSBpBwUQvoeOk0Kg36SYTcLEkXqKwOBfF9vE4KX0Nxe"
"LwjcDTpsuh3qXEaZ992r1N38VDcyS6P7I6HBYN9BsNHM362zZnY27GpTw+Kwd751"
"CLoXFPoaMOe57dbBpXoro6Pd3BTbf/Tzr88K06yEOTDKPNj3+inbMaVigtK4PLyP"
"q+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdAi4gv7Y5oliynrSIEIAYGBgYG"
"BgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGrgMEAQevAwQBBLADBAEF";
static int decode_base64(uint8_t **out, size_t *out_len, const char *in) {
size_t len;
if (!EVP_DecodedLength(&len, strlen(in))) {
fprintf(stderr, "EVP_DecodedLength failed\n");
return 0;
}
*out = OPENSSL_malloc(len);
if (*out == NULL) {
fprintf(stderr, "malloc failed\n");
return 0;
}
if (!EVP_DecodeBase64(*out, out_len, len, (const uint8_t *)in,
strlen(in))) {
fprintf(stderr, "EVP_DecodeBase64 failed\n");
OPENSSL_free(*out);
*out = NULL;
return 0;
}
return 1;
}
static int test_ssl_session_asn1(const char *input_b64) {
int ret = 0, len;
size_t input_len, encoded_len;
uint8_t *input = NULL, *encoded = NULL;
const uint8_t *cptr;
uint8_t *ptr;
SSL_SESSION *session = NULL;
/* Decode the input. */
if (!decode_base64(&input, &input_len, input_b64)) {
goto done;
}
/* Verify the SSL_SESSION decodes. */
cptr = input;
session = d2i_SSL_SESSION(NULL, &cptr, input_len);
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;
}