Hakase/nginx-quic
1
0 Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Latest update - 9178

Browse Source
This commit is contained in:
Hakase
2023-10-21 07:02:34 +09:00
parent 4bbba0d9f7
commit e0c3abc67d
7 changed files with 464 additions and 304 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/event/quic/ngx_event_quic_protection.c
+371 -266
View File
@@ -15,6 +15,8 @@
#define NGX_QUIC_AES_128_KEY_LEN 16
#define NGX_QUIC_INITIAL_CIPHER TLS1_3_CK_AES_128_GCM_SHA256
static ngx_int_t ngx_hkdf_expand(u_char *out_key, size_t out_len,
const EVP_MD *digest, const u_char *prk, size_t prk_len,
@@ -26,11 +28,18 @@ static ngx_int_t ngx_hkdf_extract(u_char *out_key, size_t *out_len,
static uint64_t ngx_quic_parse_pn(u_char **pos, ngx_int_t len, u_char *mask,
uint64_t *largest_pn);
static ngx_int_t ngx_quic_tls_open(const ngx_quic_cipher_t *cipher,
ngx_quic_secret_t *s, ngx_str_t *out, u_char *nonce, ngx_str_t *in,
ngx_str_t *ad, ngx_log_t *log);
static ngx_int_t ngx_quic_tls_hp(ngx_log_t *log, const EVP_CIPHER *cipher,
ngx_quic_secret_t *s, u_char *out, u_char *in);
static ngx_int_t ngx_quic_crypto_open(ngx_quic_secret_t *s, ngx_str_t *out,
u_char *nonce, ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log);
#ifndef OPENSSL_IS_BORINGSSL
static ngx_int_t ngx_quic_crypto_common(ngx_quic_secret_t *s, ngx_str_t *out,
u_char *nonce, ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log);
#endif
static ngx_int_t ngx_quic_crypto_hp_init(const EVP_CIPHER *cipher,
ngx_quic_secret_t *s, ngx_log_t *log);
static ngx_int_t ngx_quic_crypto_hp(ngx_quic_secret_t *s,
u_char *out, u_char *in, ngx_log_t *log);
static void ngx_quic_crypto_hp_cleanup(ngx_quic_secret_t *s);
static ngx_int_t ngx_quic_create_packet(ngx_quic_header_t *pkt,
ngx_str_t *res);
@@ -39,15 +48,10 @@ static ngx_int_t ngx_quic_create_retry_packet(ngx_quic_header_t *pkt,
ngx_int_t
ngx_quic_ciphers(ngx_uint_t id, ngx_quic_ciphers_t *ciphers,
enum ssl_encryption_level_t level)
ngx_quic_ciphers(ngx_uint_t id, ngx_quic_ciphers_t *ciphers)
{
ngx_int_t len;
if (level == ssl_encryption_initial) {
id = TLS1_3_CK_AES_128_GCM_SHA256;
}
switch (id) {
case TLS1_3_CK_AES_128_GCM_SHA256:
@@ -108,13 +112,15 @@ ngx_int_t
ngx_quic_keys_set_initial_secret(ngx_quic_keys_t *keys, ngx_str_t *secret,
ngx_log_t *log)
{
size_t is_len;
uint8_t is[SHA256_DIGEST_LENGTH];
ngx_str_t iss;
ngx_uint_t i;
const EVP_MD *digest;
ngx_quic_hkdf_t seq[8];
ngx_quic_secret_t *client, *server;
size_t is_len;
uint8_t is[SHA256_DIGEST_LENGTH];
ngx_str_t iss;
ngx_uint_t i;
const EVP_MD *digest;
ngx_quic_md_t client_key, server_key;
ngx_quic_hkdf_t seq[8];
ngx_quic_secret_t *client, *server;
ngx_quic_ciphers_t ciphers;
static const uint8_t salt[20] =
"\x38\x76\x2c\xf7\xf5\x59\x34\xb3\x4d\x17"
@@ -155,8 +161,8 @@ ngx_quic_keys_set_initial_secret(ngx_quic_keys_t *keys, ngx_str_t *secret,
client->secret.len = SHA256_DIGEST_LENGTH;
server->secret.len = SHA256_DIGEST_LENGTH;
client->key.len = NGX_QUIC_AES_128_KEY_LEN;
server->key.len = NGX_QUIC_AES_128_KEY_LEN;
client_key.len = NGX_QUIC_AES_128_KEY_LEN;
server_key.len = NGX_QUIC_AES_128_KEY_LEN;
client->hp.len = NGX_QUIC_AES_128_KEY_LEN;
server->hp.len = NGX_QUIC_AES_128_KEY_LEN;
@@ -166,11 +172,11 @@ ngx_quic_keys_set_initial_secret(ngx_quic_keys_t *keys, ngx_str_t *secret,
/* labels per RFC 9001, 5.1. Packet Protection Keys */
ngx_quic_hkdf_set(&seq[0], "tls13 client in", &client->secret, &iss);
ngx_quic_hkdf_set(&seq[1], "tls13 quic key", &client->key, &client->secret);
ngx_quic_hkdf_set(&seq[1], "tls13 quic key", &client_key, &client->secret);
ngx_quic_hkdf_set(&seq[2], "tls13 quic iv", &client->iv, &client->secret);
ngx_quic_hkdf_set(&seq[3], "tls13 quic hp", &client->hp, &client->secret);
ngx_quic_hkdf_set(&seq[4], "tls13 server in", &server->secret, &iss);
ngx_quic_hkdf_set(&seq[5], "tls13 quic key", &server->key, &server->secret);
ngx_quic_hkdf_set(&seq[5], "tls13 quic key", &server_key, &server->secret);
ngx_quic_hkdf_set(&seq[6], "tls13 quic iv", &server->iv, &server->secret);
ngx_quic_hkdf_set(&seq[7], "tls13 quic hp", &server->hp, &server->secret);
@@ -180,7 +186,37 @@ ngx_quic_keys_set_initial_secret(ngx_quic_keys_t *keys, ngx_str_t *secret,
}
}
if (ngx_quic_ciphers(NGX_QUIC_INITIAL_CIPHER, &ciphers) == NGX_ERROR) {
return NGX_ERROR;
}
if (ngx_quic_crypto_init(ciphers.c, client, &client_key, 0, log)
== NGX_ERROR)
{
return NGX_ERROR;
}
if (ngx_quic_crypto_init(ciphers.c, server, &server_key, 1, log)
== NGX_ERROR)
{
goto failed;
}
if (ngx_quic_crypto_hp_init(ciphers.hp, client, log) == NGX_ERROR) {
goto failed;
}
if (ngx_quic_crypto_hp_init(ciphers.hp, server, log) == NGX_ERROR) {
goto failed;
}
return NGX_OK;
failed:
ngx_quic_keys_cleanup(keys);
return NGX_ERROR;
}
@@ -343,138 +379,21 @@ failed:
}
static ngx_int_t
ngx_quic_tls_open(const ngx_quic_cipher_t *cipher, ngx_quic_secret_t *s,
ngx_str_t *out, u_char *nonce, ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log)
{
#ifdef OPENSSL_IS_BORINGSSL
EVP_AEAD_CTX *ctx;
ctx = EVP_AEAD_CTX_new(cipher, s->key.data, s->key.len,
EVP_AEAD_DEFAULT_TAG_LENGTH);
if (ctx == NULL) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_AEAD_CTX_new() failed");
return NGX_ERROR;
}
if (EVP_AEAD_CTX_open(ctx, out->data, &out->len, out->len, nonce, s->iv.len,
in->data, in->len, ad->data, ad->len)
!= 1)
{
EVP_AEAD_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_AEAD_CTX_open() failed");
return NGX_ERROR;
}
EVP_AEAD_CTX_free(ctx);
#else
int len;
EVP_CIPHER_CTX *ctx;
ctx = EVP_CIPHER_CTX_new();
if (ctx == NULL) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CIPHER_CTX_new() failed");
return NGX_ERROR;
}
if (EVP_DecryptInit_ex(ctx, cipher, NULL, NULL, NULL) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_DecryptInit_ex() failed");
return NGX_ERROR;
}
in->len -= NGX_QUIC_TAG_LEN;
if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, NGX_QUIC_TAG_LEN,
in->data + in->len)
== 0)
{
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0,
"EVP_CIPHER_CTX_ctrl(EVP_CTRL_AEAD_SET_TAG) failed");
return NGX_ERROR;
}
if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, s->iv.len, NULL)
== 0)
{
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0,
"EVP_CIPHER_CTX_ctrl(EVP_CTRL_AEAD_SET_IVLEN) failed");
return NGX_ERROR;
}
if (EVP_DecryptInit_ex(ctx, NULL, NULL, s->key.data, nonce) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_DecryptInit_ex() failed");
return NGX_ERROR;
}
if (EVP_CIPHER_mode(cipher) == EVP_CIPH_CCM_MODE
&& EVP_DecryptUpdate(ctx, NULL, &len, NULL, in->len) != 1)
{
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_DecryptUpdate() failed");
return NGX_ERROR;
}
if (EVP_DecryptUpdate(ctx, NULL, &len, ad->data, ad->len) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_DecryptUpdate() failed");
return NGX_ERROR;
}
if (EVP_DecryptUpdate(ctx, out->data, &len, in->data, in->len) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_DecryptUpdate() failed");
return NGX_ERROR;
}
out->len = len;
if (EVP_DecryptFinal_ex(ctx, out->data + out->len, &len) <= 0) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_DecryptFinal_ex failed");
return NGX_ERROR;
}
out->len += len;
EVP_CIPHER_CTX_free(ctx);
#endif
return NGX_OK;
}
ngx_int_t
ngx_quic_tls_seal(const ngx_quic_cipher_t *cipher, ngx_quic_secret_t *s,
ngx_str_t *out, u_char *nonce, ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log)
ngx_quic_crypto_init(const ngx_quic_cipher_t *cipher, ngx_quic_secret_t *s,
ngx_quic_md_t *key, ngx_int_t enc, ngx_log_t *log)
{
#ifdef OPENSSL_IS_BORINGSSL
EVP_AEAD_CTX *ctx;
ctx = EVP_AEAD_CTX_new(cipher, s->key.data, s->key.len,
ctx = EVP_AEAD_CTX_new(cipher, key->data, key->len,
EVP_AEAD_DEFAULT_TAG_LENGTH);
if (ctx == NULL) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_AEAD_CTX_new() failed");
return NGX_ERROR;
}
if (EVP_AEAD_CTX_seal(ctx, out->data, &out->len, out->len, nonce, s->iv.len,
in->data, in->len, ad->data, ad->len)
!= 1)
{
EVP_AEAD_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_AEAD_CTX_seal() failed");
return NGX_ERROR;
}
EVP_AEAD_CTX_free(ctx);
#else
int len;
EVP_CIPHER_CTX *ctx;
ctx = EVP_CIPHER_CTX_new();
@@ -483,9 +402,9 @@ ngx_quic_tls_seal(const ngx_quic_cipher_t *cipher, ngx_quic_secret_t *s,
return NGX_ERROR;
}
if (EVP_EncryptInit_ex(ctx, cipher, NULL, NULL, NULL) != 1) {
if (EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptInit_ex() failed");
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherInit_ex() failed");
return NGX_ERROR;
}
@@ -509,109 +428,224 @@ ngx_quic_tls_seal(const ngx_quic_cipher_t *cipher, ngx_quic_secret_t *s,
return NGX_ERROR;
}
if (EVP_EncryptInit_ex(ctx, NULL, NULL, s->key.data, nonce) != 1) {
if (EVP_CipherInit_ex(ctx, NULL, NULL, key->data, NULL, enc) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptInit_ex() failed");
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherInit_ex() failed");
return NGX_ERROR;
}
if (EVP_CIPHER_mode(cipher) == EVP_CIPH_CCM_MODE
&& EVP_EncryptUpdate(ctx, NULL, &len, NULL, in->len) != 1)
{
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptUpdate() failed");
return NGX_ERROR;
}
if (EVP_EncryptUpdate(ctx, NULL, &len, ad->data, ad->len) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptUpdate() failed");
return NGX_ERROR;
}
if (EVP_EncryptUpdate(ctx, out->data, &len, in->data, in->len) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptUpdate() failed");
return NGX_ERROR;
}
out->len = len;
if (EVP_EncryptFinal_ex(ctx, out->data + out->len, &len) <= 0) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptFinal_ex failed");
return NGX_ERROR;
}
out->len += len;
if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, NGX_QUIC_TAG_LEN,
out->data + out->len)
== 0)
{
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0,
"EVP_CIPHER_CTX_ctrl(EVP_CTRL_AEAD_GET_TAG) failed");
return NGX_ERROR;
}
out->len += NGX_QUIC_TAG_LEN;
EVP_CIPHER_CTX_free(ctx);
#endif
s->ctx = ctx;
return NGX_OK;
}
static ngx_int_t
ngx_quic_tls_hp(ngx_log_t *log, const EVP_CIPHER *cipher,
ngx_quic_secret_t *s, u_char *out, u_char *in)
ngx_quic_crypto_open(ngx_quic_secret_t *s, ngx_str_t *out, u_char *nonce,
ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log)
{
#ifdef OPENSSL_IS_BORINGSSL
if (EVP_AEAD_CTX_open(s->ctx, out->data, &out->len, out->len, nonce,
s->iv.len, in->data, in->len, ad->data, ad->len)
!= 1)
{
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_AEAD_CTX_open() failed");
return NGX_ERROR;
}
return NGX_OK;
#else
return ngx_quic_crypto_common(s, out, nonce, in, ad, log);
#endif
}
ngx_int_t
ngx_quic_crypto_seal(ngx_quic_secret_t *s, ngx_str_t *out, u_char *nonce,
ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log)
{
#ifdef OPENSSL_IS_BORINGSSL
if (EVP_AEAD_CTX_seal(s->ctx, out->data, &out->len, out->len, nonce,
s->iv.len, in->data, in->len, ad->data, ad->len)
!= 1)
{
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_AEAD_CTX_seal() failed");
return NGX_ERROR;
}
return NGX_OK;
#else
return ngx_quic_crypto_common(s, out, nonce, in, ad, log);
#endif
}
#ifndef OPENSSL_IS_BORINGSSL
static ngx_int_t
ngx_quic_crypto_common(ngx_quic_secret_t *s, ngx_str_t *out, u_char *nonce,
ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log)
{
int len, enc;
ngx_quic_crypto_ctx_t *ctx;
ctx = s->ctx;
enc = EVP_CIPHER_CTX_encrypting(ctx);
if (EVP_CipherInit_ex(ctx, NULL, NULL, NULL, nonce, enc) != 1) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherInit_ex() failed");
return NGX_ERROR;
}
if (enc == 0) {
in->len -= NGX_QUIC_TAG_LEN;
if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, NGX_QUIC_TAG_LEN,
in->data + in->len)
== 0)
{
ngx_ssl_error(NGX_LOG_INFO, log, 0,
"EVP_CIPHER_CTX_ctrl(EVP_CTRL_AEAD_SET_TAG) failed");
return NGX_ERROR;
}
}
if (EVP_CIPHER_mode(EVP_CIPHER_CTX_cipher(ctx)) == EVP_CIPH_CCM_MODE
&& EVP_CipherUpdate(ctx, NULL, &len, NULL, in->len) != 1)
{
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherUpdate() failed");
return NGX_ERROR;
}
if (EVP_CipherUpdate(ctx, NULL, &len, ad->data, ad->len) != 1) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherUpdate() failed");
return NGX_ERROR;
}
if (EVP_CipherUpdate(ctx, out->data, &len, in->data, in->len) != 1) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherUpdate() failed");
return NGX_ERROR;
}
out->len = len;
if (EVP_CipherFinal_ex(ctx, out->data + out->len, &len) <= 0) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CipherFinal_ex failed");
return NGX_ERROR;
}
out->len += len;
if (enc == 1) {
if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, NGX_QUIC_TAG_LEN,
out->data + out->len)
== 0)
{
ngx_ssl_error(NGX_LOG_INFO, log, 0,
"EVP_CIPHER_CTX_ctrl(EVP_CTRL_AEAD_GET_TAG) failed");
return NGX_ERROR;
}
out->len += NGX_QUIC_TAG_LEN;
}
return NGX_OK;
}
#endif
void
ngx_quic_crypto_cleanup(ngx_quic_secret_t *s)
{
if (s->ctx) {
#ifdef OPENSSL_IS_BORINGSSL
EVP_AEAD_CTX_free(s->ctx);
#else
EVP_CIPHER_CTX_free(s->ctx);
#endif
s->ctx = NULL;
}
}
static ngx_int_t
ngx_quic_crypto_hp_init(const EVP_CIPHER *cipher, ngx_quic_secret_t *s,
ngx_log_t *log)
{
int outlen;
EVP_CIPHER_CTX *ctx;
u_char zero[NGX_QUIC_HP_LEN] = {0};
#ifdef OPENSSL_IS_BORINGSSL
uint32_t cnt;
ngx_memcpy(&cnt, in, sizeof(uint32_t));
if (cipher == (const EVP_CIPHER *) EVP_aead_chacha20_poly1305()) {
CRYPTO_chacha_20(out, zero, NGX_QUIC_HP_LEN, s->hp.data, &in[4], cnt);
if (cipher == (EVP_CIPHER *) EVP_aead_chacha20_poly1305()) {
/* no EVP interface */
s->hp_ctx = NULL;
return NGX_OK;
}
#endif
ctx = EVP_CIPHER_CTX_new();
if (ctx == NULL) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_CIPHER_CTX_new() failed");
return NGX_ERROR;
}
if (EVP_EncryptInit_ex(ctx, cipher, NULL, s->hp.data, in) != 1) {
if (EVP_EncryptInit_ex(ctx, cipher, NULL, s->hp.data, NULL) != 1) {
EVP_CIPHER_CTX_free(ctx);
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptInit_ex() failed");
goto failed;
return NGX_ERROR;
}
s->hp_ctx = ctx;
return NGX_OK;
}
static ngx_int_t
ngx_quic_crypto_hp(ngx_quic_secret_t *s, u_char *out, u_char *in,
ngx_log_t *log)
{
int outlen;
EVP_CIPHER_CTX *ctx;
u_char zero[NGX_QUIC_HP_LEN] = {0};
ctx = s->hp_ctx;
#ifdef OPENSSL_IS_BORINGSSL
uint32_t cnt;
if (ctx == NULL) {
ngx_memcpy(&cnt, in, sizeof(uint32_t));
CRYPTO_chacha_20(out, zero, NGX_QUIC_HP_LEN, s->hp.data, &in[4], cnt);
return NGX_OK;
}
#endif
if (EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, in) != 1) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptInit_ex() failed");
return NGX_ERROR;
}
if (!EVP_EncryptUpdate(ctx, out, &outlen, zero, NGX_QUIC_HP_LEN)) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptUpdate() failed");
goto failed;
return NGX_ERROR;
}
if (!EVP_EncryptFinal_ex(ctx, out + NGX_QUIC_HP_LEN, &outlen)) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "EVP_EncryptFinal_Ex() failed");
goto failed;
return NGX_ERROR;
}
EVP_CIPHER_CTX_free(ctx);
return NGX_OK;
}
failed:
EVP_CIPHER_CTX_free(ctx);
return NGX_ERROR;
static void
ngx_quic_crypto_hp_cleanup(ngx_quic_secret_t *s)
{
if (s->hp_ctx) {
EVP_CIPHER_CTX_free(s->hp_ctx);
s->hp_ctx = NULL;
}
}
@@ -623,6 +657,7 @@ ngx_quic_keys_set_encryption_secret(ngx_log_t *log, ngx_uint_t is_write,
ngx_int_t key_len;
ngx_str_t secret_str;
ngx_uint_t i;
ngx_quic_md_t key;
ngx_quic_hkdf_t seq[3];
ngx_quic_secret_t *peer_secret;
ngx_quic_ciphers_t ciphers;
@@ -632,7 +667,7 @@ ngx_quic_keys_set_encryption_secret(ngx_log_t *log, ngx_uint_t is_write,
keys->cipher = SSL_CIPHER_get_id(cipher);
key_len = ngx_quic_ciphers(keys->cipher, &ciphers, level);
key_len = ngx_quic_ciphers(keys->cipher, &ciphers);
if (key_len == NGX_ERROR) {
ngx_ssl_error(NGX_LOG_INFO, log, 0, "unexpected cipher");
@@ -648,15 +683,14 @@ ngx_quic_keys_set_encryption_secret(ngx_log_t *log, ngx_uint_t is_write,
peer_secret->secret.len = secret_len;
ngx_memcpy(peer_secret->secret.data, secret, secret_len);
peer_secret->key.len = key_len;
key.len = key_len;
peer_secret->iv.len = NGX_QUIC_IV_LEN;
peer_secret->hp.len = key_len;
secret_str.len = secret_len;
secret_str.data = (u_char *) secret;
ngx_quic_hkdf_set(&seq[0], "tls13 quic key",
&peer_secret->key, &secret_str);
ngx_quic_hkdf_set(&seq[0], "tls13 quic key", &key, &secret_str);
ngx_quic_hkdf_set(&seq[1], "tls13 quic iv", &peer_secret->iv, &secret_str);
ngx_quic_hkdf_set(&seq[2], "tls13 quic hp", &peer_secret->hp, &secret_str);
@@ -666,15 +700,31 @@ ngx_quic_keys_set_encryption_secret(ngx_log_t *log, ngx_uint_t is_write,
}
}
if (ngx_quic_crypto_init(ciphers.c, peer_secret, &key, is_write, log)
== NGX_ERROR)
{
return NGX_ERROR;
}
if (ngx_quic_crypto_hp_init(ciphers.hp, peer_secret, log) == NGX_ERROR) {
return NGX_ERROR;
}
ngx_explicit_memzero(key.data, key.len);
return NGX_OK;
}
ngx_uint_t
ngx_quic_keys_available(ngx_quic_keys_t *keys,
enum ssl_encryption_level_t level)
enum ssl_encryption_level_t level, ngx_uint_t is_write)
{
return keys->secrets[level].client.key.len != 0;
if (is_write == 0) {
return keys->secrets[level].client.ctx != NULL;
}
return keys->secrets[level].server.ctx != NULL;
}
@@ -682,7 +732,19 @@ void
ngx_quic_keys_discard(ngx_quic_keys_t *keys,
enum ssl_encryption_level_t level)
{
keys->secrets[level].client.key.len = 0;
ngx_quic_secret_t *client, *server;
client = &keys->secrets[level].client;
server = &keys->secrets[level].server;
ngx_quic_crypto_cleanup(client);
ngx_quic_crypto_cleanup(server);
ngx_quic_crypto_hp_cleanup(client);
ngx_quic_crypto_hp_cleanup(server);
ngx_explicit_memzero(client->secret.data, client->secret.len);
ngx_explicit_memzero(server->secret.data, server->secret.len);
}
@@ -694,6 +756,9 @@ ngx_quic_keys_switch(ngx_connection_t *c, ngx_quic_keys_t *keys)
current = &keys->secrets[ssl_encryption_application];
next = &keys->next_key;
ngx_quic_crypto_cleanup(&current->client);
ngx_quic_crypto_cleanup(&current->server);
tmp = *current;
*current = *next;
*next = tmp;
@@ -703,7 +768,9 @@ ngx_quic_keys_switch(ngx_connection_t *c, ngx_quic_keys_t *keys)
void
ngx_quic_keys_update(ngx_event_t *ev)
{
ngx_int_t key_len;
ngx_uint_t i;
ngx_quic_md_t client_key, server_key;
ngx_quic_hkdf_t seq[6];
ngx_quic_keys_t *keys;
ngx_connection_t *c;
@@ -722,32 +789,35 @@ ngx_quic_keys_update(ngx_event_t *ev)
c->log->action = "updating keys";
if (ngx_quic_ciphers(keys->cipher, &ciphers, ssl_encryption_application)
== NGX_ERROR)
{
key_len = ngx_quic_ciphers(keys->cipher, &ciphers);
if (key_len == NGX_ERROR) {
goto failed;
}
client_key.len = key_len;
server_key.len = key_len;
next->client.secret.len = current->client.secret.len;
next->client.key.len = current->client.key.len;
next->client.iv.len = NGX_QUIC_IV_LEN;
next->client.hp = current->client.hp;
next->client.hp_ctx = current->client.hp_ctx;
next->server.secret.len = current->server.secret.len;
next->server.key.len = current->server.key.len;
next->server.iv.len = NGX_QUIC_IV_LEN;
next->server.hp = current->server.hp;
next->server.hp_ctx = current->server.hp_ctx;
ngx_quic_hkdf_set(&seq[0], "tls13 quic ku",
&next->client.secret, &current->client.secret);
ngx_quic_hkdf_set(&seq[1], "tls13 quic key",
&next->client.key, &next->client.secret);
&client_key, &next->client.secret);
ngx_quic_hkdf_set(&seq[2], "tls13 quic iv",
&next->client.iv, &next->client.secret);
ngx_quic_hkdf_set(&seq[3], "tls13 quic ku",
&next->server.secret, &current->server.secret);
ngx_quic_hkdf_set(&seq[4], "tls13 quic key",
&next->server.key, &next->server.secret);
&server_key, &next->server.secret);
ngx_quic_hkdf_set(&seq[5], "tls13 quic iv",
&next->server.iv, &next->server.secret);
@@ -757,6 +827,26 @@ ngx_quic_keys_update(ngx_event_t *ev)
}
}
if (ngx_quic_crypto_init(ciphers.c, &next->client, &client_key, 0, c->log)
== NGX_ERROR)
{
goto failed;
}
if (ngx_quic_crypto_init(ciphers.c, &next->server, &server_key, 1, c->log)
== NGX_ERROR)
{
goto failed;
}
ngx_explicit_memzero(current->client.secret.data,
current->client.secret.len);
ngx_explicit_memzero(current->server.secret.data,
current->server.secret.len);
ngx_explicit_memzero(client_key.data, client_key.len);
ngx_explicit_memzero(server_key.data, server_key.len);
return;
failed:
@@ -765,15 +855,36 @@ failed:
}
void
ngx_quic_keys_cleanup(ngx_quic_keys_t *keys)
{
ngx_uint_t i;
ngx_quic_secrets_t *next;
for (i = 0; i < NGX_QUIC_ENCRYPTION_LAST; i++) {
ngx_quic_keys_discard(keys, i);
}
next = &keys->next_key;
ngx_quic_crypto_cleanup(&next->client);
ngx_quic_crypto_cleanup(&next->server);
ngx_explicit_memzero(next->client.secret.data,
next->client.secret.len);
ngx_explicit_memzero(next->server.secret.data,
next->server.secret.len);
}
static ngx_int_t
ngx_quic_create_packet(ngx_quic_header_t *pkt, ngx_str_t *res)
{
u_char *pnp, *sample;
ngx_str_t ad, out;
ngx_uint_t i;
ngx_quic_secret_t *secret;
ngx_quic_ciphers_t ciphers;
u_char nonce[NGX_QUIC_IV_LEN], mask[NGX_QUIC_HP_LEN];
u_char *pnp, *sample;
ngx_str_t ad, out;
ngx_uint_t i;
ngx_quic_secret_t *secret;
u_char nonce[NGX_QUIC_IV_LEN], mask[NGX_QUIC_HP_LEN];
ad.data = res->data;
ad.len = ngx_quic_create_header(pkt, ad.data, &pnp);
@@ -786,27 +897,19 @@ ngx_quic_create_packet(ngx_quic_header_t *pkt, ngx_str_t *res)
"quic ad len:%uz %xV", ad.len, &ad);
#endif
if (ngx_quic_ciphers(pkt->keys->cipher, &ciphers, pkt->level) == NGX_ERROR)
{
return NGX_ERROR;
}
secret = &pkt->keys->secrets[pkt->level].server;
ngx_memcpy(nonce, secret->iv.data, secret->iv.len);
ngx_quic_compute_nonce(nonce, sizeof(nonce), pkt->number);
if (ngx_quic_tls_seal(ciphers.c, secret, &out,
nonce, &pkt->payload, &ad, pkt->log)
if (ngx_quic_crypto_seal(secret, &out, nonce, &pkt->payload, &ad, pkt->log)
!= NGX_OK)
{
return NGX_ERROR;
}
sample = &out.data[4 - pkt->num_len];
if (ngx_quic_tls_hp(pkt->log, ciphers.hp, secret, mask, sample)
!= NGX_OK)
{
if (ngx_quic_crypto_hp(secret, mask, sample, pkt->log) != NGX_OK) {
return NGX_ERROR;
}
@@ -828,11 +931,12 @@ ngx_quic_create_retry_packet(ngx_quic_header_t *pkt, ngx_str_t *res)
{
u_char *start;
ngx_str_t ad, itag;
ngx_quic_md_t key;
ngx_quic_secret_t secret;
ngx_quic_ciphers_t ciphers;
/* 5.8. Retry Packet Integrity */
static u_char key[16] =
static u_char key_data[16] =
"\xbe\x0c\x69\x0b\x9f\x66\x57\x5a\x1d\x76\x6b\x54\xe3\x68\xc8\x4e";
static u_char nonce[NGX_QUIC_IV_LEN] =
"\x46\x15\x99\xd3\x5d\x63\x2b\xf2\x23\x98\x25\xbb";
@@ -849,20 +953,29 @@ ngx_quic_create_retry_packet(ngx_quic_header_t *pkt, ngx_str_t *res)
"quic retry itag len:%uz %xV", ad.len, &ad);
#endif
if (ngx_quic_ciphers(0, &ciphers, pkt->level) == NGX_ERROR) {
if (ngx_quic_ciphers(NGX_QUIC_INITIAL_CIPHER, &ciphers) == NGX_ERROR) {
return NGX_ERROR;
}
secret.key.len = sizeof(key);
ngx_memcpy(secret.key.data, key, sizeof(key));
key.len = sizeof(key_data);
ngx_memcpy(key.data, key_data, sizeof(key_data));
secret.iv.len = NGX_QUIC_IV_LEN;
if (ngx_quic_tls_seal(ciphers.c, &secret, &itag, nonce, &in, &ad, pkt->log)
!= NGX_OK)
if (ngx_quic_crypto_init(ciphers.c, &secret, &key, 1, pkt->log)
== NGX_ERROR)
{
return NGX_ERROR;
}
if (ngx_quic_crypto_seal(&secret, &itag, nonce, &in, &ad, pkt->log)
!= NGX_OK)
{
ngx_quic_crypto_cleanup(&secret);
return NGX_ERROR;
}
ngx_quic_crypto_cleanup(&secret);
res->len = itag.data + itag.len - start;
res->data = start;
@@ -990,20 +1103,14 @@ ngx_quic_encrypt(ngx_quic_header_t *pkt, ngx_str_t *res)
ngx_int_t
ngx_quic_decrypt(ngx_quic_header_t *pkt, uint64_t *largest_pn)
{
u_char *p, *sample;
size_t len;
uint64_t pn, lpn;
ngx_int_t pnl, rc;
ngx_str_t in, ad;
ngx_uint_t key_phase;
ngx_quic_secret_t *secret;
ngx_quic_ciphers_t ciphers;
uint8_t nonce[NGX_QUIC_IV_LEN], mask[NGX_QUIC_HP_LEN];
if (ngx_quic_ciphers(pkt->keys->cipher, &ciphers, pkt->level) == NGX_ERROR)
{
return NGX_ERROR;
}
u_char *p, *sample;
size_t len;
uint64_t pn, lpn;
ngx_int_t pnl;
ngx_str_t in, ad;
ngx_uint_t key_phase;
ngx_quic_secret_t *secret;
uint8_t nonce[NGX_QUIC_IV_LEN], mask[NGX_QUIC_HP_LEN];
secret = &pkt->keys->secrets[pkt->level].client;
@@ -1027,9 +1134,7 @@ ngx_quic_decrypt(ngx_quic_header_t *pkt, uint64_t *largest_pn)
/* header protection */
if (ngx_quic_tls_hp(pkt->log, ciphers.hp, secret, mask, sample)
!= NGX_OK)
{
if (ngx_quic_crypto_hp(secret, mask, sample, pkt->log) != NGX_OK) {
return NGX_DECLINED;
}
@@ -1082,9 +1187,9 @@ ngx_quic_decrypt(ngx_quic_header_t *pkt, uint64_t *largest_pn)
pkt->payload.len = in.len - NGX_QUIC_TAG_LEN;
pkt->payload.data = pkt->plaintext + ad.len;
rc = ngx_quic_tls_open(ciphers.c, secret, &pkt->payload,
nonce, &in, &ad, pkt->log);
if (rc != NGX_OK) {
if (ngx_quic_crypto_open(secret, &pkt->payload, nonce, &in, &ad, pkt->log)
!= NGX_OK)
{
return NGX_DECLINED;
}