lkn
/
pcloudcc-lneely
mirror of https://github.com/lneely/pcloudcc-lneely.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
pcloudcc-lneely/pclsync/pssl.c

834 lines
27 KiB
C
Raw Blame History

/*
Copyright (c) 2014 Anton Titov.
Copyright (c) 2014 pCloud Ltd. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met: Redistributions of source code must retain the above
copyright notice, this list of conditions and the following
disclaimer. Redistributions in binary form must reproduce the
above copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution. Neither the name of pCloud Ltd nor the
names of its contributors may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL pCloud
Ltd BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
*/
#include <ctype.h>
#include <errno.h>
#include <mbedtls/bignum.h>
#include <mbedtls/ctr_drbg.h>
#include <mbedtls/debug.h>
#include <mbedtls/entropy.h>
#include <mbedtls/error.h>
#include <mbedtls/md.h>
#include <mbedtls/net_sockets.h>
#include <mbedtls/pk.h>
#include <mbedtls/pkcs5.h>
#include <mbedtls/sha256.h>
#include <mbedtls/ssl.h>
#include <pthread.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "pcache.h"
#include "pcompiler.h"
#include "plibs.h"
#include "pmemlock.h"
#include "pmemlock.h"
#include "prand.h"
#include "psettings.h"
#include "pssl.h"
#include "psslcerts.h"
#include "psynclib.h"
#include "psynclib.h"
// Lock used to serialize access to RSA decrypt key function
typedef struct {
mbedtls_ctr_drbg_context rnd;
pthread_mutex_t mutex;
} ctr_drbg_context_locked;
typedef struct {
mbedtls_net_context srv;
mbedtls_ssl_context ssl;
mbedtls_ssl_config cfg;
int sock;
int isbroken;
char cachekey[];
} ssl_connection_t;
static pthread_mutex_t rsa_decr_mutex = PTHREAD_MUTEX_INITIALIZER;
static ctr_drbg_context_locked psync_mbed_rng;
static mbedtls_entropy_context psync_mbed_entropy;
static mbedtls_x509_crt psync_mbed_trusted_certs_x509;
PSYNC_THREAD int psync_ssl_errno;
static psync_ssl_debug_callback_t debug_cb = NULL;
static void *debug_ctx = NULL;
static const int psync_mbed_ciphersuite[] = {
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
0};
static void encdata_free(psync_encrypted_data_t e) {
pssl_memclean(e->data, e->datalen);
pmemlock_free(e);
}
static ssl_connection_t *conn_alloc(const char *hostname) {
ssl_connection_t *conn;
size_t len;
len = strlen(hostname) + 1;
conn = (ssl_connection_t *)psync_malloc(offsetof(ssl_connection_t, cachekey) +
len + 4);
conn->isbroken = 0;
memcpy(conn->cachekey, "SSLS", 4);
memcpy(conn->cachekey + 4, hostname, len);
return conn;
}
static void set_errno(ssl_connection_t *conn, int err) {
if (err == MBEDTLS_ERR_SSL_WANT_READ)
psync_ssl_errno = PSYNC_SSL_ERR_WANT_READ;
else if (err == MBEDTLS_ERR_SSL_WANT_WRITE)
psync_ssl_errno = PSYNC_SSL_ERR_WANT_WRITE;
else {
psync_ssl_errno = PSYNC_SSL_ERR_UNKNOWN;
conn->isbroken = 1;
if (err == MBEDTLS_ERR_NET_RECV_FAILED)
debug(D_NOTICE, "got MBEDTLS_ERR_NET_RECV_FAILED");
else if (err == MBEDTLS_ERR_NET_SEND_FAILED)
debug(D_NOTICE, "got MBEDTLS_ERR_NET_SEND_FAILED");
else
debug(D_NOTICE, "got error %d", err);
}
}
static int mbed_read(void *ptr, unsigned char *buf, size_t len) {
ssl_connection_t *conn;
ssize_t ret;
int err;
conn = (ssl_connection_t *)ptr;
ret = read(conn->sock, buf, len);
if (ret == -1) {
err = errno;
if (err == EWOULDBLOCK || err == EAGAIN || err == EINTR)
return MBEDTLS_ERR_SSL_WANT_READ;
else
return MBEDTLS_ERR_NET_RECV_FAILED;
} else
return (int)ret;
}
static int mbed_write(void *ptr, const unsigned char *buf, size_t len) {
ssl_connection_t *conn;
ssize_t ret;
int err;
conn = (ssl_connection_t *)ptr;
ret = write(conn->sock, buf, len);
if (ret == -1) {
err = errno;
if (err == EWOULDBLOCK || err == EAGAIN || err == EINTR)
return MBEDTLS_ERR_SSL_WANT_WRITE;
else
return MBEDTLS_ERR_NET_SEND_FAILED;
} else
return (int)ret;
}
static void free_session(void *ptr) {
mbedtls_ssl_session_free((mbedtls_ssl_session *)ptr);
psync_free(ptr);
}
static void save_session(ssl_connection_t *conn) {
mbedtls_ssl_session *sess;
sess = psync_new(mbedtls_ssl_session);
// mbedtls_ssl_get_session seems to copy all elements, instead of referencing
// them, therefore it is thread safe to add session upon connect
memset(sess, 0, sizeof(mbedtls_ssl_session));
if (mbedtls_ssl_get_session(&conn->ssl, sess))
psync_free(sess);
else
pcache_add(conn->cachekey, sess, PSYNC_SSL_SESSION_CACHE_TIMEOUT,
free_session, PSYNC_MAX_SSL_SESSIONS_PER_DOMAIN);
}
static int check_peer_pubkey(ssl_connection_t *conn) {
const mbedtls_x509_crt *cert;
unsigned char buff[1024], sigbin[32];
char sighex[66];
int i;
cert = mbedtls_ssl_get_peer_cert(&conn->ssl);
if (!cert) {
debug(D_WARNING, "ssl_get_peer_cert returned NULL");
return -1;
}
if (mbedtls_pk_get_type(&cert->pk) != MBEDTLS_PK_RSA) {
debug(D_WARNING, "public key is not RSA");
return -1;
}
i = mbedtls_pk_write_pubkey_der((mbedtls_pk_context *)&cert->pk, buff,
sizeof(buff));
if (i <= 0) {
debug(D_WARNING, "pk_write_pubkey_der returned error %d", i);
return -1;
}
mbedtls_sha256(buff + sizeof(buff) - i, i, sigbin, 0);
psync_binhex(sighex, sigbin, 32);
sighex[64] = 0;
for (i = 0; i < ARRAY_SIZE(psync_ssl_trusted_pk_sha256); i++)
if (!strcmp(sighex, psync_ssl_trusted_pk_sha256[i]))
return 0;
debug(D_ERROR,
"got sha256hex of public key %s that does not match any approved "
"fingerprint",
sighex);
return -1;
}
static int ctr_drbg_random_locked(void *p_rng, unsigned char *output, size_t output_len) {
ctr_drbg_context_locked *rng;
int ret;
rng = (ctr_drbg_context_locked *)p_rng;
pthread_mutex_lock(&rng->mutex);
ret = mbedtls_ctr_drbg_random(&rng->rnd, output, output_len);
pthread_mutex_unlock(&rng->mutex);
return ret;
}
void pssl_set_log_threshold(int threshold) {
mbedtls_debug_set_threshold(threshold);
}
void pssl_set_debug_cb(psync_ssl_debug_callback_t cb, void *ctx) {
debug_cb = cb;
debug_ctx = ctx;
}
void pssl_rsa_bin_free(psync_binary_rsa_key_t bin) {
encdata_free(bin);
}
void pssl_symkey_free(psync_symmetric_key_t key) {
pssl_memclean(key->key, key->keylen);
pmemlock_free(key);
}
psync_encrypted_symmetric_key_t pssl_alloc_symkey(size_t len) {
psync_encrypted_symmetric_key_t ret;
ret = psync_malloc(offsetof(psync_encrypted_data_struct_t, data) + len);
ret->datalen = len;
return ret;
}
psync_encrypted_symmetric_key_t pssl_symkey_copy(psync_encrypted_symmetric_key_t src) {
psync_encrypted_symmetric_key_t ret;
ret = psync_malloc(offsetof(psync_encrypted_data_struct_t, data) +
src->datalen);
ret->datalen = src->datalen;
memcpy(ret->data, src->data, src->datalen);
return ret;
}
psync_symmetric_key_t pssl_symkey_decrypt_lock(psync_rsa_privatekey_t *rsa, const psync_encrypted_symmetric_key_t *enckey) {
psync_symmetric_key_t sym_key;
debug(D_NOTICE, "Get RSA decrypt key lock.");
pthread_mutex_lock(&rsa_decr_mutex);
sym_key = pssl_symkey_decrypt(*rsa, *enckey);
pthread_mutex_unlock(&rsa_decr_mutex);
debug(D_NOTICE, "RSA decrypt key Lock released.");
return sym_key;
}
int pssl_init() {
unsigned char seed[PSYNC_LHASH_DIGEST_LEN];
unsigned long i;
int result;
if (pthread_mutex_init(&psync_mbed_rng.mutex, NULL))
return PRINT_RETURN(-1);
mbedtls_entropy_init(&psync_mbed_entropy);
prand_seed(seed, seed, sizeof(seed), 0);
mbedtls_entropy_update_manual(&psync_mbed_entropy, seed, sizeof(seed));
mbedtls_ctr_drbg_init(&psync_mbed_rng.rnd);
if ((result = mbedtls_ctr_drbg_seed(&psync_mbed_rng.rnd, mbedtls_entropy_func,
&psync_mbed_entropy, NULL, 0))) {
debug(D_ERROR, "mbedtls_ctr_drbg_seed failed with return code %d", result);
return PRINT_RETURN(-1);
}
mbedtls_x509_crt_init(&psync_mbed_trusted_certs_x509);
for (i = 0; i < ARRAY_SIZE(psync_ssl_trusted_certs); i++) {
result = mbedtls_x509_crt_parse(&psync_mbed_trusted_certs_x509,
(unsigned char *)psync_ssl_trusted_certs[i],
1 + strlen(psync_ssl_trusted_certs[i]));
if (result) {
debug(D_ERROR, "failed to load certificate %lu, got result %d",
(unsigned long)i, result);
}
}
return 0;
}
void pssl_memclean(void *ptr, size_t len) {
volatile unsigned char *p = ptr;
while (len--)
*p++ = 0;
}
int pssl_connect(int sock, void **sslconn, const char *hostname) {
ssl_connection_t *conn;
mbedtls_ssl_session *sess;
int ret;
debug(D_NOTICE, "Starting SSL connection to %s", hostname);
conn = conn_alloc(hostname);
mbedtls_ssl_init(&conn->ssl);
mbedtls_ssl_config_init(&conn->cfg);
mbedtls_net_init(&conn->srv);
conn->sock = sock;
debug(D_NOTICE, "Initialized SSL structures");
if ((ret = mbedtls_ssl_config_defaults(&conn->cfg, MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
debug(D_ERROR,
"Failed to set SSL config defaults: mbedtls_ssl_config_defaults returned %d", ret);
goto err0;
}
debug(D_NOTICE, "Set SSL config defaults successfully");
// force tls 1.2
mbedtls_ssl_conf_max_tls_version(&conn->cfg, MBEDTLS_SSL_VERSION_TLS1_2);
mbedtls_ssl_conf_min_tls_version(&conn->cfg, MBEDTLS_SSL_VERSION_TLS1_2);
debug(D_NOTICE, "Set TLS version to 1.2 only");
mbedtls_ssl_conf_endpoint(&conn->cfg, MBEDTLS_SSL_IS_CLIENT);
mbedtls_ssl_conf_dbg(&conn->cfg, debug_cb, debug_ctx);
mbedtls_ssl_conf_authmode(&conn->cfg, MBEDTLS_SSL_VERIFY_REQUIRED);
mbedtls_ssl_conf_ca_chain(&conn->cfg, &psync_mbed_trusted_certs_x509, NULL);
mbedtls_ssl_conf_ciphersuites(&conn->cfg, psync_mbed_ciphersuite);
mbedtls_ssl_conf_rng(&conn->cfg, ctr_drbg_random_locked, &psync_mbed_rng);
debug(D_NOTICE, "Configured SSL parameters");
mbedtls_ssl_set_bio(&conn->ssl, &conn->srv, mbed_write, mbed_read, NULL);
mbedtls_ssl_set_hostname(&conn->ssl, hostname);
debug(D_NOTICE, "Set SSL bio and hostname");
if (mbedtls_ssl_setup(&conn->ssl, &conn->cfg) != 0) {
debug(D_ERROR, "Failed to setup SSL");
goto err0;
}
debug(D_NOTICE, "SSL setup complete");
if ((sess = (mbedtls_ssl_session *)pcache_get(conn->cachekey))) {
debug(D_NOTICE, "Reusing cached session for %s", hostname);
if (mbedtls_ssl_set_session(&conn->ssl, sess)) {
debug(D_WARNING, "ssl_set_session failed");
}
mbedtls_ssl_session_free(sess);
psync_free(sess);
} else {
debug(D_NOTICE, "No cached session found for %s", hostname);
}
debug(D_NOTICE, "Starting SSL handshake");
ret = mbedtls_ssl_handshake(&conn->ssl);
if (ret == 0) {
debug(D_NOTICE, "SSL handshake completed successfully");
if ((check_peer_pubkey(conn))) {
debug(D_ERROR, "Peer public key check failed");
goto err1;
}
*sslconn = conn;
save_session(conn);
debug(D_NOTICE, "SSL connection established successfully");
return PSYNC_SSL_SUCCESS;
}
set_errno(conn, ret);
if (likely_log(ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE)) {
*sslconn = conn;
return PSYNC_SSL_NEED_FINISH;
}
debug(D_ERROR, "SSL handshake failed with error code %d", ret);
err1:
mbedtls_ssl_free(&conn->ssl);
err0:
psync_free(conn);
return PRINT_RETURN_CONST(PSYNC_SSL_FAIL);
}
int pssl_connect_finish(void *sslconn, const char *hostname) {
ssl_connection_t *conn;
int ret;
conn = (ssl_connection_t *)sslconn;
ret = mbedtls_ssl_handshake(&conn->ssl);
if (ret == 0) {
if ((check_peer_pubkey(conn))) {
goto fail;
}
save_session(conn);
return PSYNC_SSL_SUCCESS;
} else {
debug(D_ERROR, "handshake failed, return code was %d", ret);
}
set_errno(conn, ret);
if (likely_log(ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE))
return PSYNC_SSL_NEED_FINISH;
fail:
mbedtls_ssl_free(&conn->ssl);
psync_free(conn);
return PRINT_RETURN_CONST(PSYNC_SSL_FAIL);
}
int pssl_shutdown(void *sslconn) {
ssl_connection_t *conn;
int ret;
conn = (ssl_connection_t *)sslconn;
if (conn->isbroken)
goto noshutdown;
ret = mbedtls_ssl_close_notify(&conn->ssl);
if (ret == 0)
goto noshutdown;
set_errno(conn, ret);
if (likely_log(ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE))
return PSYNC_SSL_NEED_FINISH;
noshutdown:
mbedtls_ssl_free(&conn->ssl);
psync_free(conn);
return PSYNC_SSL_SUCCESS;
}
void pssl_free(void *sslconn) {
ssl_connection_t *conn;
conn = (ssl_connection_t *)sslconn;
mbedtls_ssl_free(&conn->ssl);
psync_free(conn);
}
int pssl_pending(void *sslconn) {
return mbedtls_ssl_get_bytes_avail(&((ssl_connection_t *)sslconn)->ssl);
}
int pssl_read(void *sslconn, void *buf, int num) {
ssl_connection_t *conn;
int res;
conn = (ssl_connection_t *)sslconn;
res = mbedtls_ssl_read(&conn->ssl, (unsigned char *)buf, num);
if (res >= 0)
return res;
set_errno(conn, res);
return PSYNC_SSL_FAIL;
}
int pssl_write(void *sslconn, const void *buf, int num) {
ssl_connection_t *conn;
int res;
conn = (ssl_connection_t *)sslconn;
res = mbedtls_ssl_write(&conn->ssl, (const unsigned char *)buf, num);
if (res >= 0)
return res;
set_errno(conn, res);
return PSYNC_SSL_FAIL;
}
void pssl_rand_strong(unsigned char *buf, int num) {
// FIXME: causing segfault
if (unlikely(ctr_drbg_random_locked(&psync_mbed_rng, buf, num))) {
debug(D_CRITICAL, "could not generate %d random bytes, exiting", num);
abort();
}
}
void pssl_rand_weak(unsigned char *buf, int num) {
pssl_rand_strong(buf, num);
}
psync_rsa_t pssl_rsa_gen(int bits) {
mbedtls_rsa_context *ctx;
ctx = psync_new(mbedtls_rsa_context);
mbedtls_rsa_init(ctx);
mbedtls_rsa_set_padding(ctx, MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA1);
if (mbedtls_rsa_gen_key(ctx, ctr_drbg_random_locked, &psync_mbed_rng, bits,
65537)) {
mbedtls_rsa_free(ctx);
psync_free(ctx);
return PSYNC_INVALID_RSA;
} else
return ctx;
}
void pssl_rsa_free(psync_rsa_t rsa) {
mbedtls_rsa_free(rsa);
psync_free(rsa);
}
psync_rsa_publickey_t pssl_rsa_get_pub(psync_rsa_t rsa) {
psync_binary_rsa_key_t bin;
psync_rsa_publickey_t ret;
bin = pssl_rsa_bin_pub(rsa);
if (bin == PSYNC_INVALID_BIN_RSA)
return PSYNC_INVALID_RSA;
ret = pssl_rsa_load_pub(bin->data, bin->datalen);
pssl_rsa_bin_free(bin);
return ret;
}
void pssl_rsa_free_pub(psync_rsa_publickey_t key) {
pssl_rsa_free(key);
}
psync_rsa_privatekey_t pssl_rsa_get_priv(psync_rsa_t rsa) {
mbedtls_rsa_context *ctx;
ctx = psync_new(mbedtls_rsa_context);
mbedtls_rsa_init(ctx);
mbedtls_rsa_set_padding(ctx, MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA1);
if (unlikely(mbedtls_rsa_copy(ctx, rsa))) {
mbedtls_rsa_free(ctx);
psync_free(ctx);
return PSYNC_INVALID_RSA;
} else
return ctx;
}
void pssl_rsa_free_priv(psync_rsa_privatekey_t key) {
pssl_rsa_free(key);
}
psync_binary_rsa_key_t pssl_rsa_bin_pub(psync_rsa_publickey_t rsa) {
unsigned char buff[4096], *p;
mbedtls_pk_context ctx;
psync_binary_rsa_key_t ret;
int len;
mbedtls_pk_init(&ctx);
if (mbedtls_pk_setup(&ctx, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) ||
mbedtls_rsa_copy(mbedtls_pk_rsa(ctx), rsa))
return PSYNC_INVALID_BIN_RSA;
p = buff + sizeof(buff);
len = mbedtls_pk_write_pubkey(&p, buff, &ctx);
mbedtls_pk_free(&ctx);
if (len <= 0)
return PSYNC_INVALID_BIN_RSA;
ret =
pmemlock_malloc(offsetof(psync_encrypted_data_struct_t, data) + len);
ret->datalen = len;
memcpy(ret->data, buff + sizeof(buff) - len, len);
return ret;
}
psync_binary_rsa_key_t pssl_rsa_priv_bin(psync_rsa_privatekey_t rsa) {
unsigned char buff[4096];
mbedtls_pk_context ctx;
psync_binary_rsa_key_t ret;
int len;
mbedtls_pk_init(&ctx);
if (mbedtls_pk_setup(&ctx, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) ||
mbedtls_rsa_copy(mbedtls_pk_rsa(ctx), rsa))
return PSYNC_INVALID_BIN_RSA;
len = mbedtls_pk_write_key_der(&ctx, buff, sizeof(buff));
mbedtls_pk_free(&ctx);
if (len <= 0)
return PSYNC_INVALID_BIN_RSA;
ret =
pmemlock_malloc(offsetof(psync_encrypted_data_struct_t, data) + len);
ret->datalen = len;
memcpy(ret->data, buff + sizeof(buff) - len, len);
pssl_memclean(buff + sizeof(buff) - len, len);
return ret;
}
psync_rsa_publickey_t pssl_rsa_load_pub(const unsigned char *keydata, size_t keylen) {
mbedtls_pk_context ctx;
mbedtls_rsa_context *rsa;
int ret;
mbedtls_pk_init(&ctx);
ret = mbedtls_pk_parse_public_key(&ctx, keydata, keylen);
if (unlikely(ret)) {
debug(D_ERROR, "failed to parse public key with code %d", ret);
return PSYNC_INVALID_RSA;
}
rsa = psync_new(mbedtls_rsa_context);
mbedtls_rsa_init(rsa);
mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA1);
ret = mbedtls_rsa_copy(rsa, mbedtls_pk_rsa(ctx));
mbedtls_pk_free(&ctx);
if (unlikely(ret)) {
debug(D_WARNING, "rsa_copy failed with code %d", ret);
mbedtls_rsa_free(rsa);
psync_free(rsa);
return PSYNC_INVALID_RSA;
} else {
mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA1);
return rsa;
}
}
psync_rsa_privatekey_t pssl_rsa_load_priv(const unsigned char *keydata, size_t keylen) {
mbedtls_pk_context pkctx;
mbedtls_rsa_context *rsactx;
int ret;
mbedtls_pk_init(&pkctx);
ret = mbedtls_pk_parse_key(&pkctx, keydata, keylen, NULL, 0, mbedtls_ctr_drbg_random, &psync_mbed_rng.rnd);
if (unlikely(ret)) {
char ebuf[100];
mbedtls_strerror(ret, ebuf, sizeof(ebuf));
debug(D_WARNING, "failed to parse private key: %s (-0x%04x)", ebuf, (unsigned int) -ret);
return PSYNC_INVALID_RSA;
}
rsactx = psync_new(mbedtls_rsa_context);
mbedtls_rsa_init(rsactx);
mbedtls_rsa_set_padding(rsactx, MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA1);
ret = mbedtls_rsa_copy(rsactx, mbedtls_pk_rsa(pkctx));
mbedtls_pk_free(&pkctx);
if (unlikely(ret)) {
debug(D_WARNING, "rsa_copy failed with code %d", ret);
mbedtls_rsa_free(rsactx);
psync_free(rsactx);
return PSYNC_INVALID_RSA;
} else {
return rsactx;
}
}
psync_symmetric_key_t pssl_gen_symkey_pass(const char *password, size_t keylen, const unsigned char *salt, size_t saltlen, size_t iterations) {
psync_symmetric_key_t key = (psync_symmetric_key_t)pmemlock_malloc(
keylen + offsetof(psync_symmetric_key_struct_t, key));
mbedtls_md_context_t ctx;
mbedtls_md_init(&ctx);
mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(MBEDTLS_MD_SHA512), 0);
key->keylen = keylen;
const mbedtls_md_info_t *md_info = mbedtls_md_info_from_ctx(&ctx);
mbedtls_md_type_t md_type = mbedtls_md_get_type(md_info);
mbedtls_pkcs5_pbkdf2_hmac_ext(md_type, (const unsigned char *)password,
strlen(password), salt, saltlen, iterations, keylen,
key->key);
mbedtls_md_free(&ctx);
return key;
}
char *pssl_derive_pwd(const char *username, const char *passphrase) {
unsigned char *usercopy;
unsigned char usersha512[PSYNC_SHA512_DIGEST_LEN], passwordbin[32];
mbedtls_md_context_t ctx;
size_t userlen, i;
userlen = strlen(username);
usercopy = psync_new_cnt(unsigned char, userlen);
for (i = 0; i < userlen; i++)
if ((unsigned char)username[i] <= 127)
usercopy[i] = tolower((unsigned char)username[i]);
else
usercopy[i] = '*';
psync_sha512(usercopy, userlen, usersha512);
psync_free(usercopy);
mbedtls_md_init(&ctx);
mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(MBEDTLS_MD_SHA512), 0);
const mbedtls_md_info_t *md_info = mbedtls_md_info_from_ctx(&ctx);
mbedtls_md_type_t md_type = mbedtls_md_get_type(md_info);
mbedtls_pkcs5_pbkdf2_hmac_ext(md_type, (const unsigned char *)passphrase, strlen(passphrase), usersha512,
PSYNC_SHA512_DIGEST_LEN, 5000, sizeof(passwordbin), passwordbin);
mbedtls_md_free(&ctx);
usercopy = psync_base64_encode(passwordbin, sizeof(passwordbin), &userlen);
return (char *)usercopy;
}
psync_encrypted_symmetric_key_t pssl_rsa_encrypt(psync_rsa_publickey_t rsa, const unsigned char *data, size_t datalen) {
psync_encrypted_symmetric_key_t ret;
int code;
size_t rsalen;
rsalen = mbedtls_rsa_get_len(rsa);
ret = (psync_encrypted_symmetric_key_t)psync_malloc(
offsetof(psync_encrypted_data_struct_t, data) + rsalen);
if ((code = mbedtls_rsa_rsaes_oaep_encrypt(
rsa, ctr_drbg_random_locked, &psync_mbed_rng,
NULL, 0, datalen, data, ret->data))) {
psync_free(ret);
debug(
D_WARNING,
"rsa_rsaes_oaep_encrypt failed with error=%d, datalen=%lu, rsasize=%d",
code, (unsigned long)datalen, (int)rsalen);
return PSYNC_INVALID_ENC_SYM_KEY;
}
ret->datalen = rsalen;
debug(D_NOTICE, "datalen=%lu", (unsigned long)ret->datalen);
return ret;
}
psync_symmetric_key_t pssl_rsa_decrypt(psync_rsa_privatekey_t rsa, const unsigned char *data, size_t datalen) {
unsigned char buff[2048];
psync_symmetric_key_t ret;
size_t len;
if (mbedtls_rsa_rsaes_oaep_decrypt(rsa, ctr_drbg_random_locked,
&psync_mbed_rng, NULL,
0, &len, data, buff, sizeof(buff)))
return PSYNC_INVALID_SYM_KEY;
ret = (psync_symmetric_key_t)pmemlock_malloc(
offsetof(psync_symmetric_key_struct_t, key) + len);
ret->keylen = len;
memcpy(ret->key, buff, len);
pssl_memclean(buff, len);
return ret;
}
psync_encrypted_symmetric_key_t pssl_symkey_encrypt(psync_rsa_publickey_t rsa, const psync_symmetric_key_t key) {
return pssl_rsa_encrypt(rsa, key->key, key->keylen);
}
psync_symmetric_key_t pssl_symkey_decrypt(psync_rsa_privatekey_t rsa, const psync_encrypted_symmetric_key_t enckey) {
return pssl_rsa_decrypt(rsa, enckey->data, enckey->datalen);
}
psync_aes256_encoder pssl_enc_create(psync_symmetric_key_t key) {
mbedtls_aes_context *aes;
assert(key->keylen >= PSYNC_AES256_KEY_SIZE);
aes = psync_new(mbedtls_aes_context);
mbedtls_aes_setkey_enc(aes, key->key, 256);
return aes;
}
void pssl_enc_free(psync_aes256_encoder aes) {
pssl_memclean(aes, sizeof(mbedtls_aes_context));
psync_free(aes);
}
psync_aes256_encoder pssl_dec_create(psync_symmetric_key_t key) {
mbedtls_aes_context *aes;
assert(key->keylen >= PSYNC_AES256_KEY_SIZE);
aes = psync_new(mbedtls_aes_context);
mbedtls_aes_setkey_dec(aes, key->key, 256);
return aes;
}
void pssl_dec_free(psync_aes256_encoder aes) {
pssl_memclean(aes, sizeof(mbedtls_aes_context));
psync_free(aes);
}
psync_rsa_signature_t pssl_sha256_sign(psync_rsa_privatekey_t rsa, const unsigned char *data) {
psync_rsa_signature_t ret;
int padding, hash_id;
size_t rsalen;
rsalen = mbedtls_rsa_get_len(rsa);
ret = (psync_rsa_signature_t)psync_malloc(
offsetof(psync_symmetric_key_struct_t, key) + rsalen);
if (!ret)
return (psync_rsa_signature_t)(void *)PERROR_NO_MEMORY;
ret->datalen = rsalen;
padding = mbedtls_rsa_get_padding_mode(rsa);
hash_id = mbedtls_rsa_get_md_alg(rsa);
mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_SHA256);
if (mbedtls_rsa_rsassa_pss_sign(rsa, ctr_drbg_random_locked, &psync_mbed_rng,
MBEDTLS_MD_SHA256,
PSYNC_SHA256_DIGEST_LEN, data, ret->data)) {
free(ret);
mbedtls_rsa_set_padding(rsa, padding, hash_id);
return (psync_rsa_signature_t)(void *)PSYNC_CRYPTO_NOT_STARTED;
}
mbedtls_rsa_set_padding(rsa, padding, hash_id);
return ret;
}
void psync_aes256_decode_4blocks_consec_xor_sw(psync_aes256_decoder enc, const unsigned char *src, unsigned char *dst, unsigned char *bxor) {
unsigned long i;
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src, dst);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src + PSYNC_AES256_BLOCK_SIZE,
dst + PSYNC_AES256_BLOCK_SIZE);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT,
src + PSYNC_AES256_BLOCK_SIZE * 2,
dst + PSYNC_AES256_BLOCK_SIZE * 2);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT,
src + PSYNC_AES256_BLOCK_SIZE * 3,
dst + PSYNC_AES256_BLOCK_SIZE * 3);
for (i = 0; i < PSYNC_AES256_BLOCK_SIZE * 4 / sizeof(unsigned long); i++)
((unsigned long *)dst)[i] ^= ((unsigned long *)bxor)[i];
}
void pssl_enc_blk(psync_aes256_encoder enc, const unsigned char *src, unsigned char *dst) {
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_ENCRYPT, src, dst);
}
void pssl_dec_blk(psync_aes256_decoder enc, const unsigned char *src, unsigned char *dst) {
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src, dst);
}
void pssl_enc_2blk(psync_aes256_decoder enc, const unsigned char *src, unsigned char *dst) {
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_ENCRYPT, src, dst);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_ENCRYPT, src + PSYNC_AES256_BLOCK_SIZE,
dst + PSYNC_AES256_BLOCK_SIZE);
}
void pssl_dec_2blk(psync_aes256_decoder enc, const unsigned char *src, unsigned char *dst) {
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src, dst);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src + PSYNC_AES256_BLOCK_SIZE,
dst + PSYNC_AES256_BLOCK_SIZE);
}
void pssl_dec_4blk_xor(psync_aes256_decoder enc, const unsigned char *src, unsigned char *dst, unsigned char *bxor) {
unsigned long i;
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src, dst);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT, src + PSYNC_AES256_BLOCK_SIZE,
dst + PSYNC_AES256_BLOCK_SIZE);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT,
src + PSYNC_AES256_BLOCK_SIZE * 2,
dst + PSYNC_AES256_BLOCK_SIZE * 2);
mbedtls_aes_crypt_ecb(enc, MBEDTLS_AES_DECRYPT,
src + PSYNC_AES256_BLOCK_SIZE * 3,
dst + PSYNC_AES256_BLOCK_SIZE * 3);
for (i = 0; i < PSYNC_AES256_BLOCK_SIZE * 4 / sizeof(unsigned long); i++)
((unsigned long *)dst)[i] ^= ((unsigned long *)bxor)[i];
}
Reference in New Issue View Git Blame Copy Permalink