forked from nodejs/node
/
openssl.c
437 lines (377 loc) · 13.3 KB
/
openssl.c
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/*
* ngtcp2
*
* Copyright (c) 2019 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <assert.h>
#include <ngtcp2/ngtcp2_crypto.h>
#include <ngtcp2/ngtcp2_crypto_openssl.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/kdf.h>
#include "shared.h"
ngtcp2_crypto_ctx *ngtcp2_crypto_ctx_initial(ngtcp2_crypto_ctx *ctx) {
ctx->aead.native_handle = (void *)EVP_aes_128_gcm();
ctx->md.native_handle = (void *)EVP_sha256();
ctx->hp.native_handle = (void *)EVP_aes_128_ctr();
ctx->max_encryption = 0;
ctx->max_decryption_failure = 0;
return ctx;
}
ngtcp2_crypto_aead *ngtcp2_crypto_aead_retry(ngtcp2_crypto_aead *aead) {
aead->native_handle = (void *)EVP_aes_128_gcm();
return aead;
}
static const EVP_CIPHER *crypto_ssl_get_aead(SSL *ssl) {
switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) {
case TLS1_3_CK_AES_128_GCM_SHA256:
return EVP_aes_128_gcm();
case TLS1_3_CK_AES_256_GCM_SHA384:
return EVP_aes_256_gcm();
case TLS1_3_CK_CHACHA20_POLY1305_SHA256:
return EVP_chacha20_poly1305();
case TLS1_3_CK_AES_128_CCM_SHA256:
return EVP_aes_128_ccm();
default:
return NULL;
}
}
static uint64_t crypto_ssl_get_aead_max_encryption(SSL *ssl) {
switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) {
case TLS1_3_CK_AES_128_GCM_SHA256:
case TLS1_3_CK_AES_256_GCM_SHA384:
return NGTCP2_CRYPTO_MAX_ENCRYPTION_AES_GCM;
case TLS1_3_CK_CHACHA20_POLY1305_SHA256:
return NGTCP2_CRYPTO_MAX_ENCRYPTION_CHACHA20_POLY1305;
case TLS1_3_CK_AES_128_CCM_SHA256:
return NGTCP2_CRYPTO_MAX_ENCRYPTION_AES_CCM;
default:
return 0;
}
}
static uint64_t crypto_ssl_get_aead_max_decryption_failure(SSL *ssl) {
switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) {
case TLS1_3_CK_AES_128_GCM_SHA256:
case TLS1_3_CK_AES_256_GCM_SHA384:
return NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_AES_GCM;
case TLS1_3_CK_CHACHA20_POLY1305_SHA256:
return NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_CHACHA20_POLY1305;
case TLS1_3_CK_AES_128_CCM_SHA256:
return NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_AES_CCM;
default:
return 0;
}
}
static const EVP_CIPHER *crypto_ssl_get_hp(SSL *ssl) {
switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) {
case TLS1_3_CK_AES_128_GCM_SHA256:
case TLS1_3_CK_AES_128_CCM_SHA256:
return EVP_aes_128_ctr();
case TLS1_3_CK_AES_256_GCM_SHA384:
return EVP_aes_256_ctr();
case TLS1_3_CK_CHACHA20_POLY1305_SHA256:
return EVP_chacha20();
default:
return NULL;
}
}
static const EVP_MD *crypto_ssl_get_md(SSL *ssl) {
switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) {
case TLS1_3_CK_AES_128_GCM_SHA256:
case TLS1_3_CK_CHACHA20_POLY1305_SHA256:
case TLS1_3_CK_AES_128_CCM_SHA256:
return EVP_sha256();
case TLS1_3_CK_AES_256_GCM_SHA384:
return EVP_sha384();
default:
return NULL;
}
}
ngtcp2_crypto_ctx *ngtcp2_crypto_ctx_tls(ngtcp2_crypto_ctx *ctx,
void *tls_native_handle) {
SSL *ssl = tls_native_handle;
ctx->aead.native_handle = (void *)crypto_ssl_get_aead(ssl);
ctx->md.native_handle = (void *)crypto_ssl_get_md(ssl);
ctx->hp.native_handle = (void *)crypto_ssl_get_hp(ssl);
ctx->max_encryption = crypto_ssl_get_aead_max_encryption(ssl);
ctx->max_decryption_failure = crypto_ssl_get_aead_max_decryption_failure(ssl);
return ctx;
}
static size_t crypto_md_hashlen(const EVP_MD *md) {
return (size_t)EVP_MD_size(md);
}
size_t ngtcp2_crypto_md_hashlen(const ngtcp2_crypto_md *md) {
return crypto_md_hashlen(md->native_handle);
}
static size_t crypto_aead_keylen(const EVP_CIPHER *aead) {
return (size_t)EVP_CIPHER_key_length(aead);
}
size_t ngtcp2_crypto_aead_keylen(const ngtcp2_crypto_aead *aead) {
return crypto_aead_keylen(aead->native_handle);
}
static size_t crypto_aead_noncelen(const EVP_CIPHER *aead) {
return (size_t)EVP_CIPHER_iv_length(aead);
}
size_t ngtcp2_crypto_aead_noncelen(const ngtcp2_crypto_aead *aead) {
return crypto_aead_noncelen(aead->native_handle);
}
static size_t crypto_aead_taglen(const EVP_CIPHER *aead) {
if (aead == EVP_aes_128_gcm() || aead == EVP_aes_256_gcm()) {
return EVP_GCM_TLS_TAG_LEN;
}
if (aead == EVP_chacha20_poly1305()) {
return EVP_CHACHAPOLY_TLS_TAG_LEN;
}
if (aead == EVP_aes_128_ccm()) {
return EVP_CCM_TLS_TAG_LEN;
}
return 0;
}
size_t ngtcp2_crypto_aead_taglen(const ngtcp2_crypto_aead *aead) {
return crypto_aead_taglen(aead->native_handle);
}
int ngtcp2_crypto_hkdf_extract(uint8_t *dest, const ngtcp2_crypto_md *md,
const uint8_t *secret, size_t secretlen,
const uint8_t *salt, size_t saltlen) {
const EVP_MD *prf = md->native_handle;
int rv = 0;
EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
size_t destlen = (size_t)EVP_MD_size(prf);
if (pctx == NULL) {
return -1;
}
if (EVP_PKEY_derive_init(pctx) != 1 ||
EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY) != 1 ||
EVP_PKEY_CTX_set_hkdf_md(pctx, prf) != 1 ||
EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, (int)saltlen) != 1 ||
EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, (int)secretlen) != 1 ||
EVP_PKEY_derive(pctx, dest, &destlen) != 1) {
rv = -1;
}
EVP_PKEY_CTX_free(pctx);
return rv;
}
int ngtcp2_crypto_hkdf_expand(uint8_t *dest, size_t destlen,
const ngtcp2_crypto_md *md, const uint8_t *secret,
size_t secretlen, const uint8_t *info,
size_t infolen) {
const EVP_MD *prf = md->native_handle;
int rv = 0;
EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
if (pctx == NULL) {
return -1;
}
if (EVP_PKEY_derive_init(pctx) != 1 ||
EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY) != 1 ||
EVP_PKEY_CTX_set_hkdf_md(pctx, prf) != 1 ||
EVP_PKEY_CTX_set1_hkdf_salt(pctx, "", 0) != 1 ||
EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, (int)secretlen) != 1 ||
EVP_PKEY_CTX_add1_hkdf_info(pctx, info, (int)infolen) != 1 ||
EVP_PKEY_derive(pctx, dest, &destlen) != 1) {
rv = -1;
}
EVP_PKEY_CTX_free(pctx);
return rv;
}
int ngtcp2_crypto_encrypt(uint8_t *dest, const ngtcp2_crypto_aead *aead,
const uint8_t *plaintext, size_t plaintextlen,
const uint8_t *key, const uint8_t *nonce,
size_t noncelen, const uint8_t *ad, size_t adlen) {
const EVP_CIPHER *cipher = aead->native_handle;
size_t taglen = crypto_aead_taglen(cipher);
EVP_CIPHER_CTX *actx;
int rv = 0;
int len;
actx = EVP_CIPHER_CTX_new();
if (actx == NULL) {
return -1;
}
if (!EVP_EncryptInit_ex(actx, cipher, NULL, NULL, NULL) ||
!EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_IVLEN, (int)noncelen,
NULL) ||
(cipher == EVP_aes_128_ccm() &&
!EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_TAG, (int)taglen, NULL)) ||
!EVP_EncryptInit_ex(actx, NULL, NULL, key, nonce) ||
(cipher == EVP_aes_128_ccm() &&
!EVP_EncryptUpdate(actx, NULL, &len, NULL, (int)plaintextlen)) ||
!EVP_EncryptUpdate(actx, NULL, &len, ad, (int)adlen) ||
!EVP_EncryptUpdate(actx, dest, &len, plaintext, (int)plaintextlen) ||
!EVP_EncryptFinal_ex(actx, dest + len, &len) ||
!EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_GET_TAG, (int)taglen,
dest + plaintextlen)) {
rv = -1;
}
EVP_CIPHER_CTX_free(actx);
return rv;
}
int ngtcp2_crypto_decrypt(uint8_t *dest, const ngtcp2_crypto_aead *aead,
const uint8_t *ciphertext, size_t ciphertextlen,
const uint8_t *key, const uint8_t *nonce,
size_t noncelen, const uint8_t *ad, size_t adlen) {
const EVP_CIPHER *cipher = aead->native_handle;
size_t taglen = crypto_aead_taglen(cipher);
EVP_CIPHER_CTX *actx;
int rv = 0;
int len;
const uint8_t *tag;
if (taglen > ciphertextlen) {
return -1;
}
ciphertextlen -= taglen;
tag = ciphertext + ciphertextlen;
actx = EVP_CIPHER_CTX_new();
if (actx == NULL) {
return -1;
}
if (!EVP_DecryptInit_ex(actx, cipher, NULL, NULL, NULL) ||
!EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_IVLEN, (int)noncelen,
NULL) ||
(cipher == EVP_aes_128_ccm() &&
!EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_TAG, (int)taglen,
(uint8_t *)tag)) ||
!EVP_DecryptInit_ex(actx, NULL, NULL, key, nonce) ||
(cipher == EVP_aes_128_ccm() &&
!EVP_DecryptUpdate(actx, NULL, &len, NULL, (int)ciphertextlen)) ||
!EVP_DecryptUpdate(actx, NULL, &len, ad, (int)adlen) ||
!EVP_DecryptUpdate(actx, dest, &len, ciphertext, (int)ciphertextlen) ||
(cipher != EVP_aes_128_ccm() &&
(!EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_TAG, (int)taglen,
(uint8_t *)tag) ||
!EVP_DecryptFinal_ex(actx, dest + ciphertextlen, &len)))) {
rv = -1;
}
EVP_CIPHER_CTX_free(actx);
return rv;
}
int ngtcp2_crypto_hp_mask(uint8_t *dest, const ngtcp2_crypto_cipher *hp,
const uint8_t *hp_key, const uint8_t *sample) {
static const uint8_t PLAINTEXT[] = "\x00\x00\x00\x00\x00";
const EVP_CIPHER *cipher = hp->native_handle;
EVP_CIPHER_CTX *actx;
int rv = 0;
int len;
actx = EVP_CIPHER_CTX_new();
if (actx == NULL) {
return -1;
}
if (!EVP_EncryptInit_ex(actx, cipher, NULL, hp_key, sample) ||
!EVP_EncryptUpdate(actx, dest, &len, PLAINTEXT, sizeof(PLAINTEXT) - 1) ||
!EVP_EncryptFinal_ex(actx, dest + sizeof(PLAINTEXT) - 1, &len)) {
rv = -1;
}
EVP_CIPHER_CTX_free(actx);
return rv;
}
static OSSL_ENCRYPTION_LEVEL
from_ngtcp2_level(ngtcp2_crypto_level crypto_level) {
switch (crypto_level) {
case NGTCP2_CRYPTO_LEVEL_INITIAL:
return ssl_encryption_initial;
case NGTCP2_CRYPTO_LEVEL_HANDSHAKE:
return ssl_encryption_handshake;
case NGTCP2_CRYPTO_LEVEL_APP:
return ssl_encryption_application;
case NGTCP2_CRYPTO_LEVEL_EARLY:
return ssl_encryption_early_data;
default:
assert(0);
}
}
int ngtcp2_crypto_read_write_crypto_data(ngtcp2_conn *conn,
ngtcp2_crypto_level crypto_level,
const uint8_t *data, size_t datalen) {
SSL *ssl = ngtcp2_conn_get_tls_native_handle(conn);
int rv;
int err;
if (SSL_provide_quic_data(ssl, from_ngtcp2_level(crypto_level), data,
datalen) != 1) {
return -1;
}
if (!ngtcp2_conn_get_handshake_completed(conn)) {
rv = SSL_do_handshake(ssl);
if (rv <= 0) {
err = SSL_get_error(ssl, rv);
switch (err) {
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
return 0;
case SSL_ERROR_WANT_CLIENT_HELLO_CB:
return NGTCP2_CRYPTO_ERR_TLS_WANT_CLIENT_HELLO_CB;
case SSL_ERROR_WANT_X509_LOOKUP:
return NGTCP2_CRYPTO_ERR_TLS_WANT_X509_LOOKUP;
case SSL_ERROR_SSL:
return -1;
default:
return -1;
}
}
ngtcp2_conn_handshake_completed(conn);
}
rv = SSL_process_quic_post_handshake(ssl);
if (rv != 1) {
err = SSL_get_error(ssl, rv);
switch (err) {
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
return 0;
case SSL_ERROR_SSL:
case SSL_ERROR_ZERO_RETURN:
return -1;
default:
return -1;
}
}
return 0;
}
int ngtcp2_crypto_set_remote_transport_params(ngtcp2_conn *conn, void *tls) {
SSL *ssl = tls;
ngtcp2_transport_params_type exttype =
ngtcp2_conn_is_server(conn)
? NGTCP2_TRANSPORT_PARAMS_TYPE_CLIENT_HELLO
: NGTCP2_TRANSPORT_PARAMS_TYPE_ENCRYPTED_EXTENSIONS;
const uint8_t *tp;
size_t tplen;
ngtcp2_transport_params params;
int rv;
SSL_get_peer_quic_transport_params(ssl, &tp, &tplen);
rv = ngtcp2_decode_transport_params(¶ms, exttype, tp, tplen);
if (rv != 0) {
ngtcp2_conn_set_tls_error(conn, rv);
return -1;
}
rv = ngtcp2_conn_set_remote_transport_params(conn, ¶ms);
if (rv != 0) {
ngtcp2_conn_set_tls_error(conn, rv);
return -1;
}
return 0;
}
int ngtcp2_crypto_set_local_transport_params(void *tls, const uint8_t *buf,
size_t len) {
if (SSL_set_quic_transport_params(tls, buf, len) != 1) {
return -1;
}
return 0;
}