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Merge branch 'maint-0.2.8'

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This commit is contained in:
Nick Mathewson 2016-06-14 12:17:24 -04:00
commit df4fa92a88
6 changed files with 195 additions and 36 deletions
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4
changes/bug19406 Normal file
View File

@ -0,0 +1,4 @@
o Minor features (build):
- Tor now again builds with the recent OpenSSL 1.1 development branch
(tested against 1.1.0-pre5 and 1.1.0-pre6-dev).

182
src/common/crypto.c
View File

@ -72,13 +72,18 @@
#define DISABLE_ENGINES
#endif
#if OPENSSL_VERSION_NUMBER >= OPENSSL_VER(1,1,0,0,4) && \
#if OPENSSL_VERSION_NUMBER >= OPENSSL_VER(1,1,0,0,5) && \
!defined(LIBRESSL_VERSION_NUMBER)
/* OpenSSL as of 1.1.0-pre4 has an "new" thread API, which doesn't require
/* OpenSSL as of 1.1.0pre4 has an "new" thread API, which doesn't require
* seting up various callbacks.
*
* Note: Yes, using OPENSSL_VER is naughty, but this was introduced in the
* pre-release series.
* OpenSSL 1.1.0pre4 has a messed up `ERR_remove_thread_state()` prototype,
* while the previous one was restored in pre5, and the function made a no-op
* (along with a deprecated annotation, which produces a compiler warning).
*
* While it is possible to support all three versions of the thread API,
* a version that existed only for one snapshot pre-release is kind of
* pointless, so let's not.
*/
#define NEW_THREAD_API
#endif
@ -89,11 +94,6 @@
/** Largest strong entropy request */
#define MAX_STRONGEST_RAND_SIZE 256
/** Macro: is k a valid RSA public or private key? */
#define PUBLIC_KEY_OK(k) ((k) && (k)->key && (k)->key->n)
/** Macro: is k a valid RSA private key? */
#define PRIVATE_KEY_OK(k) ((k) && (k)->key && (k)->key->p)
#ifndef NEW_THREAD_API
/** A number of preallocated mutexes for use by OpenSSL. */
static tor_mutex_t **openssl_mutexes_ = NULL;
@ -426,13 +426,29 @@ crypto_global_init(int useAccel, const char *accelName, const char *accelDir)
void
crypto_thread_cleanup(void)
{
#ifdef NEW_THREAD_API
ERR_remove_thread_state();
#else
#ifndef NEW_THREAD_API
ERR_remove_thread_state(NULL);
#endif
}
/** used internally: quicly validate a crypto_pk_t object as a private key.
* Return 1 iff the public key is valid, 0 if obviously invalid.
*/
static int
crypto_pk_private_ok(const crypto_pk_t *k)
{
#ifdef OPENSSL_1_1_API
if (!k || !k->key)
return 0;
BIGNUM *p, *q;
RSA_get0_factors(k->key, &p, &q);
return p != NULL; /* XXX/yawning: Should we check q? */
#else
return k && k->key && k->key->p;
#endif
}
/** used by tortls.c: wrap an RSA* in a crypto_pk_t. */
crypto_pk_t *
crypto_new_pk_from_rsa_(RSA *rsa)
@ -795,7 +811,7 @@ crypto_pk_write_private_key_to_filename(crypto_pk_t *env,
char *s;
int r;
tor_assert(PRIVATE_KEY_OK(env));
tor_assert(crypto_pk_private_ok(env));
if (!(bio = BIO_new(BIO_s_mem())))
return -1;
@ -837,7 +853,7 @@ int
crypto_pk_key_is_private(const crypto_pk_t *key)
{
tor_assert(key);
return PRIVATE_KEY_OK(key);
return crypto_pk_private_ok(key);
}
/** Return true iff <b>env</b> contains a public key whose public exponent
@ -849,7 +865,15 @@ crypto_pk_public_exponent_ok(crypto_pk_t *env)
tor_assert(env);
tor_assert(env->key);
return BN_is_word(env->key->e, 65537);
BIGNUM *e;
#ifdef OPENSSL_1_1_API
BIGNUM *n, *d;
RSA_get0_key(env->key, &n, &e, &d);
#else
e = env->key->e;
#endif
return BN_is_word(e, 65537);
}
/** Compare the public-key components of a and b. Return less than 0
@ -870,12 +894,27 @@ crypto_pk_cmp_keys(const crypto_pk_t *a, const crypto_pk_t *b)
if (an_argument_is_null)
return result;
tor_assert(PUBLIC_KEY_OK(a));
tor_assert(PUBLIC_KEY_OK(b));
result = BN_cmp((a->key)->n, (b->key)->n);
BIGNUM *a_n, *a_e;
BIGNUM *b_n, *b_e;
#ifdef OPENSSL_1_1_API
BIGNUM *a_d, *b_d;
RSA_get0_key(a->key, &a_n, &a_e, &a_d);
RSA_get0_key(b->key, &b_n, &b_e, &b_d);
#else
a_n = a->key->n;
a_e = a->key->e;
b_n = b->key->n;
b_e = b->key->e;
#endif
tor_assert(a_n != NULL && a_e != NULL);
tor_assert(b_n != NULL && b_e != NULL);
result = BN_cmp(a_n, b_n);
if (result)
return result;
return BN_cmp((a->key)->e, (b->key)->e);
return BN_cmp(a_e, b_e);
}
/** Compare the public-key components of a and b. Return non-zero iff
@ -906,9 +945,20 @@ crypto_pk_num_bits(crypto_pk_t *env)
{
tor_assert(env);
tor_assert(env->key);
tor_assert(env->key->n);
#ifdef OPENSSL_1_1_API
/* It's so stupid that there's no other way to check that n is valid
* before calling RSA_bits().
*/
BIGNUM *n, *e, *d;
RSA_get0_key(env->key, &n, &e, &d);
tor_assert(n != NULL);
return RSA_bits(env->key);
#else
tor_assert(env->key->n);
return BN_num_bits(env->key->n);
#endif
}
/** Increase the reference count of <b>env</b>, and return it.
@ -933,7 +983,7 @@ crypto_pk_copy_full(crypto_pk_t *env)
tor_assert(env);
tor_assert(env->key);
if (PRIVATE_KEY_OK(env)) {
if (crypto_pk_private_ok(env)) {
new_key = RSAPrivateKey_dup(env->key);
privatekey = 1;
} else {
@ -1007,7 +1057,7 @@ crypto_pk_private_decrypt(crypto_pk_t *env, char *to,
tor_assert(env->key);
tor_assert(fromlen<INT_MAX);
tor_assert(tolen >= crypto_pk_keysize(env));
if (!env->key->p)
if (!crypto_pk_key_is_private(env))
/* Not a private key */
return -1;
@ -1113,7 +1163,7 @@ crypto_pk_private_sign(const crypto_pk_t *env, char *to, size_t tolen,
tor_assert(to);
tor_assert(fromlen < INT_MAX);
tor_assert(tolen >= crypto_pk_keysize(env));
if (!env->key->p)
if (!crypto_pk_key_is_private(env))
/* Not a private key */
return -1;
@ -2106,25 +2156,35 @@ crypto_validate_dh_params(const BIGNUM *p, const BIGNUM *g)
DH *dh = NULL;
int ret = -1;
/* Copy into a temporary DH object. */
/* Copy into a temporary DH object, just so that DH_check() can be called. */
if (!(dh = DH_new()))
goto out;
#ifdef OPENSSL_1_1_API
BIGNUM *dh_p, *dh_g;
if (!(dh_p = BN_dup(p)))
goto out;
if (!(dh_g = BN_dup(g)))
goto out;
if (!DH_set0_pqg(dh, dh_p, NULL, dh_g))
goto out;
#else
if (!(dh->p = BN_dup(p)))
goto out;
if (!(dh->g = BN_dup(g)))
goto out;
#endif
/* Perform the validation. */
int codes = 0;
if (!DH_check(dh, &codes))
goto out;
if (BN_is_word(dh->g, DH_GENERATOR_2)) {
if (BN_is_word(g, DH_GENERATOR_2)) {
/* Per https://wiki.openssl.org/index.php/Diffie-Hellman_parameters
*
* OpenSSL checks the prime is congruent to 11 when g = 2; while the
* IETF's primes are congruent to 23 when g = 2.
*/
BN_ULONG residue = BN_mod_word(dh->p, 24);
BN_ULONG residue = BN_mod_word(p, 24);
if (residue == 11 || residue == 23)
codes &= ~DH_NOT_SUITABLE_GENERATOR;
}
@ -2260,6 +2320,30 @@ crypto_dh_new(int dh_type)
if (!(res->dh = DH_new()))
goto err;
#ifdef OPENSSL_1_1_API
BIGNUM *dh_p = NULL, *dh_g = NULL;
if (dh_type == DH_TYPE_TLS) {
dh_p = BN_dup(dh_param_p_tls);
} else {
dh_p = BN_dup(dh_param_p);
}
if (!dh_p)
goto err;
dh_g = BN_dup(dh_param_g);
if (!dh_g) {
BN_free(dh_p);
goto err;
}
if (!DH_set0_pqg(res->dh, dh_p, NULL, dh_g)) {
goto err;
}
if (!DH_set_length(res->dh, DH_PRIVATE_KEY_BITS))
goto err;
#else
if (dh_type == DH_TYPE_TLS) {
if (!(res->dh->p = BN_dup(dh_param_p_tls)))
goto err;
@ -2272,6 +2356,7 @@ crypto_dh_new(int dh_type)
goto err;
res->dh->length = DH_PRIVATE_KEY_BITS;
#endif
return res;
err:
@ -2311,7 +2396,9 @@ crypto_dh_get_bytes(crypto_dh_t *dh)
int
crypto_dh_generate_public(crypto_dh_t *dh)
{
#ifndef OPENSSL_1_1_API
again:
#endif
if (!DH_generate_key(dh->dh)) {
/* LCOV_EXCL_START
* To test this we would need some way to tell openssl to break DH. */
@ -2319,6 +2406,19 @@ crypto_dh_generate_public(crypto_dh_t *dh)
return -1;
/* LCOV_EXCL_STOP */
}
#ifdef OPENSSL_1_1_API
/* OpenSSL 1.1.x doesn't appear to let you regenerate a DH key, without
* recreating the DH object. I have no idea what sort of aliasing madness
* can occur here, so do the check, and just bail on failure.
*/
BIGNUM *pub_key, *priv_key;
DH_get0_key(dh->dh, &pub_key, &priv_key);
if (tor_check_dh_key(LOG_WARN, pub_key)<0) {
log_warn(LD_CRYPTO, "Weird! Our own DH key was invalid. I guess once-in-"
"the-universe chances really do happen. Treating as a failure.");
return -1;
}
#else
if (tor_check_dh_key(LOG_WARN, dh->dh->pub_key)<0) {
/* LCOV_EXCL_START
* If this happens, then openssl's DH implementation is busted. */
@ -2331,6 +2431,7 @@ crypto_dh_generate_public(crypto_dh_t *dh)
goto again;
/* LCOV_EXCL_STOP */
}
#endif
return 0;
}
@ -2343,13 +2444,30 @@ crypto_dh_get_public(crypto_dh_t *dh, char *pubkey, size_t pubkey_len)
{
int bytes;
tor_assert(dh);
if (!dh->dh->pub_key) {
BIGNUM *dh_pub;
#ifdef OPENSSL_1_1_API
BIGNUM *dh_priv;
DH_get0_key(dh->dh, &dh_pub, &dh_priv);
#else
dh_pub = dh->dh->pub_key;
#endif
if (!dh_pub) {
if (crypto_dh_generate_public(dh)<0)
return -1;
else {
#ifdef OPENSSL_1_1_API
DH_get0_key(dh->dh, &dh_pub, &dh_priv);
#else
dh_pub = dh->dh->pub_key;
#endif
}
}
tor_assert(dh->dh->pub_key);
bytes = BN_num_bytes(dh->dh->pub_key);
tor_assert(dh_pub);
bytes = BN_num_bytes(dh_pub);
tor_assert(bytes >= 0);
if (pubkey_len < (size_t)bytes) {
log_warn(LD_CRYPTO,
@ -2359,7 +2477,7 @@ crypto_dh_get_public(crypto_dh_t *dh, char *pubkey, size_t pubkey_len)
}
memset(pubkey, 0, pubkey_len);
BN_bn2bin(dh->dh->pub_key, (unsigned char*)(pubkey+(pubkey_len-bytes)));
BN_bn2bin(dh_pub, (unsigned char*)(pubkey+(pubkey_len-bytes)));
return 0;
}
@ -3232,9 +3350,7 @@ int
crypto_global_cleanup(void)
{
EVP_cleanup();
#ifdef NEW_THREAD_API
ERR_remove_thread_state();
#else
#ifndef NEW_THREAD_API
ERR_remove_thread_state(NULL);
#endif
ERR_free_strings();

6
src/common/tortls.c
View File

@ -215,7 +215,9 @@ tor_tls_log_one_error(tor_tls_t *tls, unsigned long err,
case SSL_R_HTTP_REQUEST:
case SSL_R_HTTPS_PROXY_REQUEST:
case SSL_R_RECORD_LENGTH_MISMATCH:
#ifndef OPENSSL_1_1_API
case SSL_R_RECORD_TOO_LARGE:
#endif
case SSL_R_UNKNOWN_PROTOCOL:
case SSL_R_UNSUPPORTED_PROTOCOL:
severity = LOG_INFO;
@ -891,7 +893,11 @@ tor_tls_cert_is_valid(int severity,
cert_key = X509_get_pubkey(cert->cert);
if (check_rsa_1024 && cert_key) {
RSA *rsa = EVP_PKEY_get1_RSA(cert_key);
#ifdef OPENSSL_1_1_API
if (rsa && RSA_bits(rsa) == 1024)
#else
if (rsa && BN_num_bits(rsa->n) == 1024)
#endif
key_ok = 1;
if (rsa)
RSA_free(rsa);

6
src/test/test_tortls.c
View File

@ -381,10 +381,12 @@ test_tortls_log_one_error(void *ignored)
LOG_WARN, 0, NULL);
expect_log_severity(LOG_INFO);
#ifndef OPENSSL_1_1_API
mock_clean_saved_logs();
tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_RECORD_TOO_LARGE),
LOG_WARN, 0, NULL);
expect_log_severity(LOG_INFO);
#endif
mock_clean_saved_logs();
tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_UNKNOWN_PROTOCOL),
@ -679,7 +681,7 @@ test_tortls_get_my_client_auth_key(void *ignored)
crypto_pk_t *ret;
crypto_pk_t *expected;
tor_tls_context_t *ctx;
RSA *k = tor_malloc_zero(sizeof(RSA));
RSA *k = RSA_new();
ctx = tor_malloc_zero(sizeof(tor_tls_context_t));
expected = crypto_new_pk_from_rsa_(k);
@ -694,8 +696,8 @@ test_tortls_get_my_client_auth_key(void *ignored)
tt_assert(ret == expected);
done:
RSA_free(k);
tor_free(expected);
tor_free(k);
tor_free(ctx);
}

11
src/tools/tor-checkkey.c
View File

@ -9,6 +9,7 @@
#include "torlog.h"
#include "util.h"
#include "compat.h"
#include "compat_openssl.h"
#include <openssl/bn.h>
#include <openssl/rsa.h>
@ -70,7 +71,15 @@ main(int c, char **v)
printf("%s\n",digest);
} else {
rsa = crypto_pk_get_rsa_(env);
str = BN_bn2hex(rsa->n);
BIGNUM *rsa_n;
#ifdef OPENSSL_1_1_API
BIGNUM *rsa_e, *rsa_d;
RSA_get0_key(rsa, &rsa_n, &rsa_e, &rsa_d);
#else
rsa_n = rsa->n;
#endif
str = BN_bn2hex(rsa_n);
printf("%s\n", str);
}

22
src/tools/tor-gencert.c
View File

@ -13,6 +13,20 @@
#include <unistd.h>
#endif
#ifdef __GNUC__
#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#endif
#if __GNUC__ && GCC_VERSION >= 402
#if GCC_VERSION >= 406
#pragma GCC diagnostic push
#endif
/* Some versions of OpenSSL declare X509_STORE_CTX_set_verify_cb twice in
* x509.h and x509_vfy.h. Suppress the GCC warning so we can build with
* -Wredundant-decl. */
#pragma GCC diagnostic ignored "-Wredundant-decls"
#endif
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
@ -20,6 +34,14 @@
#include <openssl/obj_mac.h>
#include <openssl/err.h>
#if __GNUC__ && GCC_VERSION >= 402
#if GCC_VERSION >= 406
#pragma GCC diagnostic pop
#else
#pragma GCC diagnostic warning "-Wredundant-decls"
#endif
#endif
#include <errno.h>
#if 0
#include <stdlib.h>