&& (s)->method->version != TLS_ANY_VERSION)
# define SSL_TREAT_AS_TLS13(s) \
- (SSL_IS_TLS13(s) || (s)->early_data_state == SSL_EARLY_DATA_WRITING)
+ (SSL_IS_TLS13(s) || (s)->early_data_state == SSL_EARLY_DATA_WRITING \
+ || (s)->early_data_state == SSL_EARLY_DATA_WRITE_RETRY)
# define SSL_IS_FIRST_HANDSHAKE(S) ((s)->s3->tmp.finish_md_len == 0)
/* This is the cert and type for the other end. */
X509 *peer;
int peer_type;
- /* Certificate chain peer sent */
+ /* Certificate chain peer sent. */
STACK_OF(X509) *peer_chain;
/*
* when app_verify_callback accepts a session where the peer's
int tick_identity;
/* Max number of bytes that can be sent as early data */
uint32_t max_early_data;
+ /* The ALPN protocol selected for this session */
+ unsigned char *alpn_selected;
+ size_t alpn_selected_len;
} ext;
# ifndef OPENSSL_NO_SRP
char *srp_username;
SSL_EARLY_DATA_CONNECTING,
SSL_EARLY_DATA_WRITE_RETRY,
SSL_EARLY_DATA_WRITING,
+ SSL_EARLY_DATA_UNAUTH_WRITING,
SSL_EARLY_DATA_FINISHED_WRITING,
SSL_EARLY_DATA_ACCEPT_RETRY,
SSL_EARLY_DATA_ACCEPTING,
SSL_EARLY_DATA_FINISHED_READING
} SSL_EARLY_DATA_STATE;
+/*
+ * We check that the amount of unreadable early data doesn't exceed
+ * max_early_data. max_early_data is given in plaintext bytes. However if it is
+ * unreadable then we only know the number of ciphertext bytes. We also don't
+ * know how much the overhead should be because it depends on the ciphersuite.
+ * We make a small allowance. We assume 5 records of actual data plus the end
+ * of early data alert record. Each record has a tag and a content type byte.
+ * The longest tag length we know of is EVP_GCM_TLS_TAG_LEN. We don't count the
+ * content of the alert record either which is 2 bytes.
+ */
+# define EARLY_DATA_CIPHERTEXT_OVERHEAD ((6 * (EVP_GCM_TLS_TAG_LEN + 1)) + 2)
+
+/*
+ * The allowance we have between the client's calculated ticket age and our own.
+ * We allow for 10 seconds (units are in ms). If a ticket is presented and the
+ * client's age calculation is different by more than this than our own then we
+ * do not allow that ticket for early_data.
+ */
+# define TICKET_AGE_ALLOWANCE (10 * 1000)
+
#define MAX_COMPRESSIONS_SIZE 255
struct ssl_comp_st {
/* used if SSL's info_callback is NULL */
void (*info_callback) (const SSL *ssl, int type, int val);
- /* what we put in client cert requests */
- STACK_OF(X509_NAME) *client_CA;
+ /*
+ * What we put in certificate_authorities extension for TLS 1.3
+ * (ClientHello and CertificateRequest) or just client cert requests for
+ * earlier versions.
+ */
+ STACK_OF(X509_NAME) *ca_names;
/*
* Default values to use in SSL structures follow (these are copied by
/* The maximum number of bytes that can be sent as early data */
uint32_t max_early_data;
+
+ /* TLS1.3 padding callback */
+ size_t (*record_padding_cb)(SSL *s, int type, size_t len, void *arg);
+ void *record_padding_arg;
+ size_t block_padding;
};
struct ssl_st {
unsigned char client_finished_secret[EVP_MAX_MD_SIZE];
unsigned char server_finished_secret[EVP_MAX_MD_SIZE];
unsigned char server_finished_hash[EVP_MAX_MD_SIZE];
+ unsigned char handshake_traffic_hash[EVP_MAX_MD_SIZE];
unsigned char client_app_traffic_secret[EVP_MAX_MD_SIZE];
unsigned char server_app_traffic_secret[EVP_MAX_MD_SIZE];
EVP_CIPHER_CTX *enc_read_ctx; /* cryptographic state */
/* extra application data */
CRYPTO_EX_DATA ex_data;
/* for server side, keep the list of CA_dn we can use */
- STACK_OF(X509_NAME) *client_CA;
+ STACK_OF(X509_NAME) *ca_names;
CRYPTO_REF_COUNT references;
/* protocol behaviour */
uint32_t options;
/* Set to one if we have negotiated ETM */
int use_etm;
- /* Set to 1 if we are expecting to receive early data */
- int expect_early_data;
+ /* Are we expecting to receive early data? */
+ int early_data;
+ /* Is the session suitable for early data? */
+ int early_data_ok;
+
+ /* May be sent by a server in HRR. Must be echoed back in ClientHello */
+ unsigned char *tls13_cookie;
+ size_t tls13_cookie_len;
} ext;
/* Parsed form of the ClientHello, kept around across early_cb calls. */
ASYNC_WAIT_CTX *waitctx;
size_t asyncrw;
- /* The maximum number of bytes that can be sent as early data */
+ /* The maximum number of plaintext bytes that can be sent as early data */
uint32_t max_early_data;
+ /*
+ * The number of bytes of early data received so far. If we accepted early
+ * data then this is a count of the plaintext bytes. If we rejected it then
+ * this is a count of the ciphertext bytes.
+ */
+ uint32_t early_data_count;
+
+ /* TLS1.3 padding callback */
+ size_t (*record_padding_cb)(SSL *s, int type, size_t len, void *arg);
+ void *record_padding_arg;
+ size_t block_padding;
CRYPTO_RWLOCK *lock;
};
/* Certificate types in certificate request message. */
uint8_t *ctype;
size_t ctype_len;
- STACK_OF(X509_NAME) *ca_names;
+ /* Certificate authorities list peer sent */
+ STACK_OF(X509_NAME) *peer_ca_names;
size_t key_block_length;
unsigned char *key_block;
const EVP_CIPHER *new_sym_enc;
# define SSL_CERT_FLAGS_CHECK_TLS_STRICT \
(SSL_CERT_FLAG_SUITEB_128_LOS|SSL_CERT_FLAG_TLS_STRICT)
+typedef enum {
+ ENDPOINT_CLIENT = 0,
+ ENDPOINT_SERVER,
+ ENDPOINT_BOTH
+} ENDPOINT;
+
+
typedef struct {
unsigned short ext_type;
+ ENDPOINT role;
+ /* The context which this extension applies to */
+ unsigned int context;
/*
* Per-connection flags relating to this extension type: not used if
* part of an SSL_CTX structure.
*/
uint32_t ext_flags;
- custom_ext_add_cb add_cb;
- custom_ext_free_cb free_cb;
+ SSL_custom_ext_add_cb_ex add_cb;
+ SSL_custom_ext_free_cb_ex free_cb;
void *add_arg;
- custom_ext_parse_cb parse_cb;
+ SSL_custom_ext_parse_cb_ex parse_cb;
void *parse_arg;
} custom_ext_method;
*/
X509_STORE *chain_store;
X509_STORE *verify_store;
- /* Custom extension methods for server and client */
- custom_ext_methods cli_ext;
- custom_ext_methods srv_ext;
+ /* Custom extensions */
+ custom_ext_methods custext;
/* Security callback */
int (*sec_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
void *other, void *ex);
} SSL3_COMP;
# endif
+typedef enum downgrade_en {
+ DOWNGRADE_NONE,
+ DOWNGRADE_TO_1_2,
+ DOWNGRADE_TO_1_1
+} DOWNGRADE;
+
/*
* Extension index values NOTE: Any updates to these defines should be mirrored
* with equivalent updates to ext_defs in extensions.c
TLSEXT_IDX_renegotiate,
TLSEXT_IDX_server_name,
TLSEXT_IDX_srp,
- TLSEXT_IDX_early_data_info,
- TLSEXT_IDX_early_data,
TLSEXT_IDX_ec_point_formats,
TLSEXT_IDX_supported_groups,
TLSEXT_IDX_session_ticket,
TLSEXT_IDX_supported_versions,
TLSEXT_IDX_psk_kex_modes,
TLSEXT_IDX_key_share,
+ TLSEXT_IDX_cookie,
TLSEXT_IDX_cryptopro_bug,
+ TLSEXT_IDX_early_data,
+ TLSEXT_IDX_certificate_authorities,
TLSEXT_IDX_padding,
TLSEXT_IDX_psk
} TLSEXT_INDEX;
/* A dummy signature value not valid for TLSv1.2 signature algs */
#define TLSEXT_signature_rsa_pss 0x0101
+/* TLSv1.3 downgrade protection sentinel values */
+extern const unsigned char tls11downgrade[8];
+extern const unsigned char tls12downgrade[8];
extern SSL3_ENC_METHOD ssl3_undef_enc_method;
# ifndef OPENSSL_UNIT_TEST
-int ssl_end_of_early_data_seen(SSL *s);
__owur int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes);
__owur int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written);
void ssl_clear_cipher_ctx(SSL *s);
void ssl_sort_cipher_list(void);
void ssl_load_ciphers(void);
__owur int ssl_fill_hello_random(SSL *s, int server, unsigned char *field,
- size_t len);
+ size_t len, DOWNGRADE dgrd);
__owur int ssl_generate_master_secret(SSL *s, unsigned char *pms, size_t pmslen,
int free_pms);
__owur EVP_PKEY *ssl_generate_pkey(EVP_PKEY *pm);
__owur int ssl_set_client_hello_version(SSL *s);
__owur int ssl_check_version_downgrade(SSL *s);
__owur int ssl_set_version_bound(int method_version, int version, int *bound);
-__owur int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello);
-__owur int ssl_choose_client_version(SSL *s, int version);
-int ssl_get_client_min_max_version(const SSL *s, int *min_version,
- int *max_version);
+__owur int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello,
+ DOWNGRADE *dgrd);
+__owur int ssl_choose_client_version(SSL *s, int version, int checkdgrd,
+ int *al);
+int ssl_get_min_max_version(const SSL *s, int *min_version, int *max_version);
__owur long tls1_default_timeout(void);
__owur int dtls1_do_write(SSL *s, int type);
__owur size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs);
__owur int tls12_check_peer_sigalg(SSL *s, uint16_t, EVP_PKEY *pkey);
void ssl_set_client_disabled(SSL *s);
-__owur int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op);
+__owur int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op, int echde);
__owur int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
size_t *hashlen);
__owur int srp_generate_client_master_secret(SSL *s);
__owur int srp_verify_server_param(SSL *s, int *al);
-/* t1_ext.c */
+/* statem/extensions_cust.c */
+
+custom_ext_method *custom_ext_find(const custom_ext_methods *exts,
+ ENDPOINT role, unsigned int ext_type,
+ size_t *idx);
void custom_ext_init(custom_ext_methods *meths);
-__owur int custom_ext_parse(SSL *s, int server,
- unsigned int ext_type,
+__owur int custom_ext_parse(SSL *s, unsigned int context, unsigned int ext_type,
const unsigned char *ext_data, size_t ext_size,
- int *al);
-__owur int custom_ext_add(SSL *s, int server, WPACKET *pkt, int *al);
+ X509 *x, size_t chainidx, int *al);
+__owur int custom_ext_add(SSL *s, int context, WPACKET *pkt, X509 *x,
+ size_t chainidx, int maxversion, int *al);
__owur int custom_exts_copy(custom_ext_methods *dst,
const custom_ext_methods *src);
+__owur int custom_exts_copy_flags(custom_ext_methods *dst,
+ const custom_ext_methods *src);
void custom_exts_free(custom_ext_methods *exts);
void ssl_comp_free_compression_methods_int(void);
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