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diff --git a/web/server/h2o/libh2o/deps/picotls/include/picotls.h b/web/server/h2o/libh2o/deps/picotls/include/picotls.h
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+/*
+ * Copyright (c) 2016 DeNA Co., Ltd., Kazuho Oku
+ *
+ * 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.
+ */
+#ifndef picotls_h
+#define picotls_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <assert.h>
+#include <inttypes.h>
+#include <sys/types.h>
+
+#define PTLS_AES128_KEY_SIZE 16
+#define PTLS_AES256_KEY_SIZE 32
+#define PTLS_AES_IV_SIZE 16
+#define PTLS_AESGCM_IV_SIZE 12
+#define PTLS_AESGCM_TAG_SIZE 16
+
+#define PTLS_CHACHA20_KEY_SIZE 32
+#define PTLS_CHACHA20_IV_SIZE 16
+#define PTLS_CHACHA20POLY1305_IV_SIZE 12
+#define PTLS_CHACHA20POLY1305_TAG_SIZE 16
+
+#define PTLS_SHA256_BLOCK_SIZE 64
+#define PTLS_SHA256_DIGEST_SIZE 32
+
+#define PTLS_SHA384_BLOCK_SIZE 128
+#define PTLS_SHA384_DIGEST_SIZE 48
+
+#define PTLS_MAX_SECRET_SIZE 32
+#define PTLS_MAX_IV_SIZE 16
+#define PTLS_MAX_DIGEST_SIZE 64
+
+/* cipher-suites */
+#define PTLS_CIPHER_SUITE_AES_128_GCM_SHA256 0x1301
+#define PTLS_CIPHER_SUITE_AES_256_GCM_SHA384 0x1302
+#define PTLS_CIPHER_SUITE_CHACHA20_POLY1305_SHA256 0x1303
+
+/* negotiated_groups */
+#define PTLS_GROUP_SECP256R1 23
+#define PTLS_GROUP_X25519 29
+
+/* signature algorithms */
+#define PTLS_SIGNATURE_RSA_PKCS1_SHA1 0x0201
+#define PTLS_SIGNATURE_RSA_PKCS1_SHA256 0x0401
+#define PTLS_SIGNATURE_ECDSA_SECP256R1_SHA256 0x0403
+#define PTLS_SIGNATURE_ECDSA_SECP384R1_SHA384 0x0503
+#define PTLS_SIGNATURE_ECDSA_SECP521R1_SHA512 0x0603
+#define PTLS_SIGNATURE_RSA_PSS_RSAE_SHA256 0x0804
+#define PTLS_SIGNATURE_RSA_PSS_RSAE_SHA384 0x0805
+#define PTLS_SIGNATURE_RSA_PSS_RSAE_SHA512 0x0806
+
+/* error classes and macros */
+#define PTLS_ERROR_CLASS_SELF_ALERT 0
+#define PTLS_ERROR_CLASS_PEER_ALERT 0x100
+#define PTLS_ERROR_CLASS_INTERNAL 0x200
+
+#define PTLS_ERROR_GET_CLASS(e) ((e) & ~0xff)
+#define PTLS_ALERT_TO_SELF_ERROR(e) ((e) + PTLS_ERROR_CLASS_SELF_ALERT)
+#define PTLS_ALERT_TO_PEER_ERROR(e) ((e) + PTLS_ERROR_CLASS_PEER_ALERT)
+#define PTLS_ERROR_TO_ALERT(e) ((e)&0xff)
+
+/* alerts */
+#define PTLS_ALERT_LEVEL_WARNING 1
+#define PTLS_ALERT_LEVEL_FATAL 2
+
+#define PTLS_ALERT_CLOSE_NOTIFY 0
+#define PTLS_ALERT_UNEXPECTED_MESSAGE 10
+#define PTLS_ALERT_BAD_RECORD_MAC 20
+#define PTLS_ALERT_HANDSHAKE_FAILURE 40
+#define PTLS_ALERT_BAD_CERTIFICATE 42
+#define PTLS_ALERT_CERTIFICATE_REVOKED 44
+#define PTLS_ALERT_CERTIFICATE_EXPIRED 45
+#define PTLS_ALERT_CERTIFICATE_UNKNOWN 46
+#define PTLS_ALERT_ILLEGAL_PARAMETER 47
+#define PTLS_ALERT_DECODE_ERROR 50
+#define PTLS_ALERT_DECRYPT_ERROR 51
+#define PTLS_ALERT_PROTOCOL_VERSION 70
+#define PTLS_ALERT_INTERNAL_ERROR 80
+#define PTLS_ALERT_USER_CANCELED 90
+#define PTLS_ALERT_MISSING_EXTENSION 109
+#define PTLS_ALERT_UNRECOGNIZED_NAME 112
+#define PTLS_ALERT_NO_APPLICATION_PROTOCOL 120
+
+/* internal errors */
+#define PTLS_ERROR_NO_MEMORY (PTLS_ERROR_CLASS_INTERNAL + 1)
+#define PTLS_ERROR_IN_PROGRESS (PTLS_ERROR_CLASS_INTERNAL + 2)
+#define PTLS_ERROR_LIBRARY (PTLS_ERROR_CLASS_INTERNAL + 3)
+#define PTLS_ERROR_INCOMPATIBLE_KEY (PTLS_ERROR_CLASS_INTERNAL + 4)
+#define PTLS_ERROR_SESSION_NOT_FOUND (PTLS_ERROR_CLASS_INTERNAL + 5)
+#define PTLS_ERROR_STATELESS_RETRY (PTLS_ERROR_CLASS_INTERNAL + 6)
+
+#define PTLS_ERROR_INCORRECT_BASE64 (PTLS_ERROR_CLASS_INTERNAL + 50)
+#define PTLS_ERROR_PEM_LABEL_NOT_FOUND (PTLS_ERROR_CLASS_INTERNAL + 51)
+#define PTLS_ERROR_BER_INCORRECT_ENCODING (PTLS_ERROR_CLASS_INTERNAL + 52)
+#define PTLS_ERROR_BER_MALFORMED_TYPE (PTLS_ERROR_CLASS_INTERNAL + 53)
+#define PTLS_ERROR_BER_MALFORMED_LENGTH (PTLS_ERROR_CLASS_INTERNAL + 54)
+#define PTLS_ERROR_BER_EXCESSIVE_LENGTH (PTLS_ERROR_CLASS_INTERNAL + 55)
+#define PTLS_ERROR_BER_ELEMENT_TOO_SHORT (PTLS_ERROR_CLASS_INTERNAL + 56)
+#define PTLS_ERROR_BER_UNEXPECTED_EOC (PTLS_ERROR_CLASS_INTERNAL + 57)
+#define PTLS_ERROR_DER_INDEFINITE_LENGTH (PTLS_ERROR_CLASS_INTERNAL + 58)
+#define PTLS_ERROR_INCORRECT_ASN1_SYNTAX (PTLS_ERROR_CLASS_INTERNAL + 59)
+#define PTLS_ERROR_INCORRECT_PEM_KEY_VERSION (PTLS_ERROR_CLASS_INTERNAL + 60)
+#define PTLS_ERROR_INCORRECT_PEM_ECDSA_KEY_VERSION (PTLS_ERROR_CLASS_INTERNAL + 61)
+#define PTLS_ERROR_INCORRECT_PEM_ECDSA_CURVE (PTLS_ERROR_CLASS_INTERNAL + 62)
+#define PTLS_ERROR_INCORRECT_PEM_ECDSA_KEYSIZE (PTLS_ERROR_CLASS_INTERNAL + 63)
+#define PTLS_ERROR_INCORRECT_ASN1_ECDSA_KEY_SYNTAX (PTLS_ERROR_CLASS_INTERNAL + 64)
+
+#define PTLS_ZERO_DIGEST_SHA256 \
+ { \
+ 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, \
+ 0x64, 0x9b, 0x93, 0x4c, 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 \
+ }
+
+#define PTLS_ZERO_DIGEST_SHA384 \
+ { \
+ 0x38, 0xb0, 0x60, 0xa7, 0x51, 0xac, 0x96, 0x38, 0x4c, 0xd9, 0x32, 0x7e, 0xb1, 0xb1, 0xe3, 0x6a, 0x21, 0xfd, 0xb7, 0x11, \
+ 0x14, 0xbe, 0x07, 0x43, 0x4c, 0x0c, 0xc7, 0xbf, 0x63, 0xf6, 0xe1, 0xda, 0x27, 0x4e, 0xde, 0xbf, 0xe7, 0x6f, 0x65, \
+ 0xfb, 0xd5, 0x1a, 0xd2, 0xf1, 0x48, 0x98, 0xb9, 0x5b \
+ }
+
+typedef struct st_ptls_t ptls_t;
+typedef struct st_ptls_context_t ptls_context_t;
+
+/**
+ * represents a sequence of octets
+ */
+typedef struct st_ptls_iovec_t {
+ uint8_t *base;
+ size_t len;
+} ptls_iovec_t;
+
+/**
+ * used for storing output
+ */
+typedef struct st_ptls_buffer_t {
+ uint8_t *base;
+ size_t capacity;
+ size_t off;
+ int is_allocated;
+} ptls_buffer_t;
+
+/**
+ * key exchange context built by ptls_key_exchange_algorithm::create.
+ */
+typedef struct st_ptls_key_exchange_context_t {
+ /**
+ * called once per created context. Callee must free resources allocated to the context and set *keyex to NULL. Secret and
+ * peerkey will be NULL in case the exchange never happened.
+ */
+ int (*on_exchange)(struct st_ptls_key_exchange_context_t **keyex, ptls_iovec_t *secret, ptls_iovec_t peerkey);
+} ptls_key_exchange_context_t;
+
+/**
+ * A key exchange algorithm.
+ */
+typedef const struct st_ptls_key_exchange_algorithm_t {
+ /**
+ * ID defined by the TLS specification
+ */
+ uint16_t id;
+ /**
+ * creates a context for asynchronous key exchange. The function is called when ClientHello is generated. The on_exchange
+ * callback of the created context is called when the client receives ServerHello.
+ */
+ int (*create)(ptls_key_exchange_context_t **ctx, ptls_iovec_t *pubkey);
+ /**
+ * implements synchronous key exchange. Called when receiving a ServerHello.
+ */
+ int (*exchange)(ptls_iovec_t *pubkey, ptls_iovec_t *secret, ptls_iovec_t peerkey);
+} ptls_key_exchange_algorithm_t;
+
+/**
+ * context of a symmetric cipher
+ */
+typedef struct st_ptls_cipher_context_t {
+ const struct st_ptls_cipher_algorithm_t *algo;
+ /* field above this line must not be altered by the crypto binding */
+ void (*do_dispose)(struct st_ptls_cipher_context_t *ctx);
+ void (*do_init)(struct st_ptls_cipher_context_t *ctx, const void *iv);
+ void (*do_transform)(struct st_ptls_cipher_context_t *ctx, void *output, const void *input, size_t len);
+} ptls_cipher_context_t;
+
+/**
+ * a symmetric cipher
+ */
+typedef const struct st_ptls_cipher_algorithm_t {
+ const char *name;
+ size_t key_size;
+ size_t iv_size;
+ size_t context_size;
+ int (*setup_crypto)(ptls_cipher_context_t *ctx, int is_enc, const void *key);
+} ptls_cipher_algorithm_t;
+
+/**
+ * AEAD context. AEAD implementations are allowed to stuff data at the end of the struct. The size of the memory allocated for the
+ * struct is governed by ptls_aead_algorithm_t::context_size.
+ */
+typedef struct st_ptls_aead_context_t {
+ const struct st_ptls_aead_algorithm_t *algo;
+ uint8_t static_iv[PTLS_MAX_IV_SIZE];
+ /* field above this line must not be altered by the crypto binding */
+ void (*dispose_crypto)(struct st_ptls_aead_context_t *ctx);
+ void (*do_encrypt_init)(struct st_ptls_aead_context_t *ctx, const void *iv, const void *aad, size_t aadlen);
+ size_t (*do_encrypt_update)(struct st_ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen);
+ size_t (*do_encrypt_final)(struct st_ptls_aead_context_t *ctx, void *output);
+ size_t (*do_decrypt)(struct st_ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen, const void *iv,
+ const void *aad, size_t aadlen);
+} ptls_aead_context_t;
+
+/**
+ * An AEAD cipher.
+ */
+typedef const struct st_ptls_aead_algorithm_t {
+ /**
+ * name (following the convention of `openssl ciphers -v ALL`)
+ */
+ const char *name;
+ /**
+ * the underlying key stream
+ */
+ ptls_cipher_algorithm_t *ctr_cipher;
+ /**
+ * key size
+ */
+ size_t key_size;
+ /**
+ * size of the IV
+ */
+ size_t iv_size;
+ /**
+ * size of the tag
+ */
+ size_t tag_size;
+ /**
+ * size of memory allocated for ptls_aead_context_t. AEAD implementations can set this value to something greater than
+ * sizeof(ptls_aead_context_t) and stuff additional data at the bottom of the struct.
+ */
+ size_t context_size;
+ /**
+ * callback that sets up the crypto
+ */
+ int (*setup_crypto)(ptls_aead_context_t *ctx, int is_enc, const void *key);
+} ptls_aead_algorithm_t;
+
+/**
+ *
+ */
+typedef enum en_ptls_hash_final_mode_t {
+ /**
+ * obtains the digest and frees the context
+ */
+ PTLS_HASH_FINAL_MODE_FREE = 0,
+ /**
+ * obtains the digest and reset the context to initial state
+ */
+ PTLS_HASH_FINAL_MODE_RESET = 1,
+ /**
+ * obtains the digest while leaving the context as-is
+ */
+ PTLS_HASH_FINAL_MODE_SNAPSHOT = 2
+} ptls_hash_final_mode_t;
+
+/**
+ * A hash context.
+ */
+typedef struct st_ptls_hash_context_t {
+ /**
+ * feeds additional data into the hash context
+ */
+ void (*update)(struct st_ptls_hash_context_t *ctx, const void *src, size_t len);
+ /**
+ * returns the digest and performs necessary operation specified by mode
+ */
+ void (* final)(struct st_ptls_hash_context_t *ctx, void *md, ptls_hash_final_mode_t mode);
+ /**
+ * creates a copy of the hash context
+ */
+ struct st_ptls_hash_context_t *(*clone_)(struct st_ptls_hash_context_t *src);
+} ptls_hash_context_t;
+
+/**
+ * A hash algorithm and its properties.
+ */
+typedef const struct st_ptls_hash_algorithm_t {
+ /**
+ * block size
+ */
+ size_t block_size;
+ /**
+ * digest size
+ */
+ size_t digest_size;
+ /**
+ * constructor that creates the hash context
+ */
+ ptls_hash_context_t *(*create)(void);
+ /**
+ * digest of zero-length octets
+ */
+ uint8_t empty_digest[PTLS_MAX_DIGEST_SIZE];
+} ptls_hash_algorithm_t;
+
+typedef const struct st_ptls_cipher_suite_t {
+ uint16_t id;
+ ptls_aead_algorithm_t *aead;
+ ptls_hash_algorithm_t *hash;
+} ptls_cipher_suite_t;
+
+#define PTLS_CALLBACK_TYPE0(ret, name) \
+ typedef struct st_ptls_##name##_t { \
+ ret (*cb)(struct st_ptls_##name##_t * self); \
+ } ptls_##name##_t
+
+#define PTLS_CALLBACK_TYPE(ret, name, ...) \
+ typedef struct st_ptls_##name##_t { \
+ ret (*cb)(struct st_ptls_##name##_t * self, __VA_ARGS__); \
+ } ptls_##name##_t
+
+/**
+ * returns current time in milliseconds (ptls_get_time can be used to return the physical time)
+ */
+PTLS_CALLBACK_TYPE0(uint64_t, get_time);
+/**
+ * after receiving ClientHello, the core calls the optional callback to give a chance to the swap the context depending on the input
+ * values. The callback is required to call `ptls_set_server_name` if an SNI extension needs to be sent to the client.
+ */
+PTLS_CALLBACK_TYPE(int, on_client_hello, ptls_t *tls, ptls_iovec_t server_name, const ptls_iovec_t *negotiated_protocols,
+ size_t num_negotiated_protocols, const uint16_t *signature_algorithms, size_t num_signature_algorithms);
+/**
+ * when generating Certificate, the core calls the callback to obtain the OCSP response for stapling.
+ */
+PTLS_CALLBACK_TYPE(int, staple_ocsp, ptls_t *tls, ptls_buffer_t *output, size_t cert_index);
+/**
+ * when gerenating CertificateVerify, the core calls the callback to sign the handshake context using the certificate.
+ */
+PTLS_CALLBACK_TYPE(int, sign_certificate, ptls_t *tls, uint16_t *selected_algorithm, ptls_buffer_t *output, ptls_iovec_t input,
+ const uint16_t *algorithms, size_t num_algorithms);
+/**
+ * after receiving Certificate, the core calls the callback to verify the certificate chain and to obtain a pointer to a
+ * callback that should be used for verifying CertificateVerify. If an error occurs between a successful return from this
+ * callback to the invocation of the verify_sign callback, verify_sign is called with both data and sign set to an empty buffer.
+ * The implementor of the callback should use that as the opportunity to free any temporary data allocated for the verify_sign
+ * callback.
+ */
+PTLS_CALLBACK_TYPE(int, verify_certificate, ptls_t *tls,
+ int (**verify_sign)(void *verify_ctx, ptls_iovec_t data, ptls_iovec_t sign), void **verify_data,
+ ptls_iovec_t *certs, size_t num_certs);
+/**
+ * encrypt-and-signs (or verify-and-decrypts) a ticket (server-only)
+ */
+PTLS_CALLBACK_TYPE(int, encrypt_ticket, ptls_t *tls, int is_encrypt, ptls_buffer_t *dst, ptls_iovec_t src);
+/**
+ * saves a ticket (client-only)
+ */
+PTLS_CALLBACK_TYPE(int, save_ticket, ptls_t *tls, ptls_iovec_t input);
+/**
+ * secret logginng
+ */
+PTLS_CALLBACK_TYPE(void, log_secret, ptls_t *tls, const char *label, ptls_iovec_t secret);
+/**
+ * reference counting
+ */
+PTLS_CALLBACK_TYPE(void, update_open_count, ssize_t delta);
+
+/**
+ * the configuration
+ */
+struct st_ptls_context_t {
+ /**
+ * PRNG to be used
+ */
+ void (*random_bytes)(void *buf, size_t len);
+ /**
+ *
+ */
+ ptls_get_time_t *get_time;
+ /**
+ * list of supported key-exchange algorithms terminated by NULL
+ */
+ ptls_key_exchange_algorithm_t **key_exchanges;
+ /**
+ * list of supported cipher-suites terminated by NULL
+ */
+ ptls_cipher_suite_t **cipher_suites;
+ /**
+ * list of certificates
+ */
+ struct {
+ ptls_iovec_t *list;
+ size_t count;
+ } certificates;
+ /**
+ *
+ */
+ ptls_on_client_hello_t *on_client_hello;
+ /**
+ *
+ */
+ ptls_staple_ocsp_t *staple_ocsp;
+ /**
+ *
+ */
+ ptls_sign_certificate_t *sign_certificate;
+ /**
+ *
+ */
+ ptls_verify_certificate_t *verify_certificate;
+ /**
+ * lifetime of a session ticket (server-only)
+ */
+ uint32_t ticket_lifetime;
+ /**
+ * maximum permitted size of early data (server-only)
+ */
+ uint32_t max_early_data_size;
+ /**
+ * if set, psk handshakes use (ec)dhe
+ */
+ unsigned require_dhe_on_psk : 1;
+ /**
+ * if exporter master secrets should be recorded
+ */
+ unsigned use_exporter : 1;
+ /**
+ * if ChangeCipherSpec message should be sent during handshake
+ */
+ unsigned send_change_cipher_spec : 1;
+ /**
+ *
+ */
+ ptls_encrypt_ticket_t *encrypt_ticket;
+ /**
+ *
+ */
+ ptls_save_ticket_t *save_ticket;
+ /**
+ *
+ */
+ ptls_log_secret_t *log_secret;
+ /**
+ *
+ */
+ ptls_update_open_count_t *update_open_count;
+};
+
+typedef struct st_ptls_raw_extension_t {
+ uint16_t type;
+ ptls_iovec_t data;
+} ptls_raw_extension_t;
+
+/**
+ * optional arguments to client-driven handshake
+ */
+#ifdef _WINDOWS
+/* suppress warning C4201: nonstandard extension used: nameless struct/union */
+#pragma warning(push)
+#pragma warning(disable : 4201)
+#endif
+typedef struct st_ptls_handshake_properties_t {
+ union {
+ struct {
+ /**
+ * list of protocols offered through ALPN
+ */
+ struct {
+ const ptls_iovec_t *list;
+ size_t count;
+ } negotiated_protocols;
+ /**
+ * session ticket sent to the application via save_ticket callback
+ */
+ ptls_iovec_t session_ticket;
+ /**
+ * pointer to store the maximum size of early-data that can be sent immediately (if NULL, early data is not used)
+ */
+ size_t *max_early_data_size;
+ /**
+ *
+ */
+ unsigned early_data_accepted_by_peer : 1;
+ /**
+ * negotiate the key exchange method before sending key_share
+ */
+ unsigned negotiate_before_key_exchange : 1;
+ } client;
+ struct {
+ /**
+ * psk binder being selected (len is set to zero if none)
+ */
+ struct {
+ uint8_t base[PTLS_MAX_DIGEST_SIZE];
+ size_t len;
+ } selected_psk_binder;
+ /**
+ * parameters related to use of the Cookie extension
+ */
+ struct {
+ /**
+ * HMAC key to protect the integrity of the cookie. The key should be as long as the digest size of the first
+ * ciphersuite specified in ptls_context_t (i.e. the hash algorithm of the best ciphersuite that can be chosen).
+ */
+ const void *key;
+ /**
+ * additional data to be used for verifying the cookie
+ */
+ ptls_iovec_t additional_data;
+ } cookie;
+ /**
+ * if HRR should always be sent
+ */
+ unsigned enforce_retry : 1;
+ /**
+ * if retry should be stateless (cookie.key MUST be set when this option is used)
+ */
+ unsigned retry_uses_cookie : 1;
+ } server;
+ };
+ /**
+ * an optional list of additional extensions to send either in CH or EE, terminated by type == UINT16_MAX
+ */
+ ptls_raw_extension_t *additional_extensions;
+ /**
+ * an optional callback that returns a boolean value indicating if a particular extension should be collected
+ */
+ int (*collect_extension)(ptls_t *tls, struct st_ptls_handshake_properties_t *properties, uint16_t type);
+ /**
+ * an optional callback that reports the extensions being collected
+ */
+ int (*collected_extensions)(ptls_t *tls, struct st_ptls_handshake_properties_t *properties, ptls_raw_extension_t *extensions);
+} ptls_handshake_properties_t;
+#ifdef _WINDOWS
+#pragma warning(pop)
+#endif
+
+/**
+ * builds a new ptls_iovec_t instance using the supplied parameters
+ */
+static ptls_iovec_t ptls_iovec_init(const void *p, size_t len);
+/**
+ * initializes a buffer, setting the default destination to the small buffer provided as the argument.
+ */
+static void ptls_buffer_init(ptls_buffer_t *buf, void *smallbuf, size_t smallbuf_size);
+/**
+ * disposes a buffer, freeing resources allocated by the buffer itself (if any)
+ */
+static void ptls_buffer_dispose(ptls_buffer_t *buf);
+/**
+ * internal
+ */
+void ptls_buffer__release_memory(ptls_buffer_t *buf);
+/**
+ * reserves space for additional amount of memory
+ */
+int ptls_buffer_reserve(ptls_buffer_t *buf, size_t delta);
+/**
+ * internal
+ */
+int ptls_buffer__do_pushv(ptls_buffer_t *buf, const void *src, size_t len);
+/**
+ * internal
+ */
+int ptls_buffer__adjust_asn1_blocksize(ptls_buffer_t *buf, size_t body_size);
+/**
+ * pushes an unsigned bigint
+ */
+int ptls_buffer_push_asn1_ubigint(ptls_buffer_t *buf, const void *bignum, size_t size);
+
+#define ptls_buffer_pushv(buf, src, len) \
+ do { \
+ if ((ret = ptls_buffer__do_pushv((buf), (src), (len))) != 0) \
+ goto Exit; \
+ } while (0)
+
+#define ptls_buffer_push(buf, ...) \
+ do { \
+ if ((ret = ptls_buffer__do_pushv((buf), (uint8_t[]){__VA_ARGS__}, sizeof((uint8_t[]){__VA_ARGS__}))) != 0) \
+ goto Exit; \
+ } while (0)
+
+#define ptls_buffer_push16(buf, v) \
+ do { \
+ uint16_t _v = (v); \
+ ptls_buffer_push(buf, (uint8_t)(_v >> 8), (uint8_t)_v); \
+ } while (0)
+
+#define ptls_buffer_push32(buf, v) \
+ do { \
+ uint32_t _v = (v); \
+ ptls_buffer_push(buf, (uint8_t)(_v >> 24), (uint8_t)(_v >> 16), (uint8_t)(_v >> 8), (uint8_t)_v); \
+ } while (0)
+
+#define ptls_buffer_push64(buf, v) \
+ do { \
+ uint64_t _v = (v); \
+ ptls_buffer_push(buf, (uint8_t)(_v >> 56), (uint8_t)(_v >> 48), (uint8_t)(_v >> 40), (uint8_t)(_v >> 32), \
+ (uint8_t)(_v >> 24), (uint8_t)(_v >> 16), (uint8_t)(_v >> 8), (uint8_t)_v); \
+ } while (0)
+
+#define ptls_buffer_push_block(buf, _capacity, block) \
+ do { \
+ size_t capacity = (_capacity); \
+ ptls_buffer_pushv((buf), (uint8_t *)"\0\0\0\0\0\0\0", capacity); \
+ size_t body_start = (buf)->off; \
+ do { \
+ block \
+ } while (0); \
+ size_t body_size = (buf)->off - body_start; \
+ for (; capacity != 0; --capacity) \
+ (buf)->base[body_start - capacity] = (uint8_t)(body_size >> (8 * (capacity - 1))); \
+ } while (0)
+
+#define ptls_buffer_push_asn1_block(buf, block) \
+ do { \
+ ptls_buffer_push((buf), 0xff); /* dummy */ \
+ size_t body_start = (buf)->off; \
+ do { \
+ block \
+ } while (0); \
+ size_t body_size = (buf)->off - body_start; \
+ if (body_size < 128) { \
+ (buf)->base[body_start - 1] = (uint8_t)body_size; \
+ } else { \
+ if ((ret = ptls_buffer__adjust_asn1_blocksize((buf), body_size)) != 0) \
+ goto Exit; \
+ } \
+ } while (0)
+
+#define ptls_buffer_push_asn1_sequence(buf, block) \
+ do { \
+ ptls_buffer_push((buf), 0x30); \
+ ptls_buffer_push_asn1_block((buf), block); \
+ } while (0)
+
+int ptls_decode16(uint16_t *value, const uint8_t **src, const uint8_t *end);
+int ptls_decode32(uint32_t *value, const uint8_t **src, const uint8_t *end);
+int ptls_decode64(uint64_t *value, const uint8_t **src, const uint8_t *end);
+
+#define ptls_decode_open_block(src, end, capacity, block) \
+ do { \
+ size_t _capacity = (capacity); \
+ if (_capacity > (size_t)(end - (src))) { \
+ ret = PTLS_ALERT_DECODE_ERROR; \
+ goto Exit; \
+ } \
+ size_t _block_size = 0; \
+ do { \
+ _block_size = _block_size << 8 | *(src)++; \
+ } while (--_capacity != 0); \
+ if (_block_size > (size_t)(end - (src))) { \
+ ret = PTLS_ALERT_DECODE_ERROR; \
+ goto Exit; \
+ } \
+ do { \
+ const uint8_t *const end = (src) + _block_size; \
+ do { \
+ block \
+ } while (0); \
+ if ((src) != end) { \
+ ret = PTLS_ALERT_DECODE_ERROR; \
+ goto Exit; \
+ } \
+ } while (0); \
+ } while (0)
+
+#define ptls_decode_assert_block_close(src, end) \
+ do { \
+ if ((src) != end) { \
+ ret = PTLS_ALERT_DECODE_ERROR; \
+ goto Exit; \
+ } \
+ } while (0);
+
+#define ptls_decode_block(src, end, capacity, block) \
+ do { \
+ ptls_decode_open_block((src), end, capacity, block); \
+ ptls_decode_assert_block_close((src), end); \
+ } while (0)
+
+/**
+ * create a object to handle new TLS connection. Client-side of a TLS connection is created if server_name is non-NULL. Otherwise,
+ * a server-side connection is created.
+ */
+ptls_t *ptls_new(ptls_context_t *ctx, int is_server);
+/**
+ * releases all resources associated to the object
+ */
+void ptls_free(ptls_t *tls);
+/**
+ * returns address of the crypto callbacks that the connection is using
+ */
+ptls_context_t *ptls_get_context(ptls_t *tls);
+/**
+ * updates the context of a connection. Can be called from `on_client_hello` callback.
+ */
+void ptls_set_context(ptls_t *tls, ptls_context_t *ctx);
+/**
+ * returns the client-random
+ */
+ptls_iovec_t ptls_get_client_random(ptls_t *tls);
+/**
+ * returns the cipher-suite being used
+ */
+ptls_cipher_suite_t *ptls_get_cipher(ptls_t *tls);
+/**
+ * returns the server-name (NULL if SNI is not used or failed to negotiate)
+ */
+const char *ptls_get_server_name(ptls_t *tls);
+/**
+ * sets the server-name (for client the value sent in SNI). If server_name_len is zero, then strlen(server_name) is called to
+ * determine
+ * the length of the name.
+ */
+int ptls_set_server_name(ptls_t *tls, const char *server_name, size_t server_name_len);
+/**
+ * returns the negotiated protocol (or NULL)
+ */
+const char *ptls_get_negotiated_protocol(ptls_t *tls);
+/**
+ * sets the negotiated protocol. If protocol_len is zero, strlen(protocol) is called to determine the length of the protocol name.
+ */
+int ptls_set_negotiated_protocol(ptls_t *tls, const char *protocol, size_t protocol_len);
+/**
+ * returns if the handshake has been completed
+ */
+int ptls_handshake_is_complete(ptls_t *tls);
+/**
+ * returns if a PSK (or PSK-DHE) handshake was performed
+ */
+int ptls_is_psk_handshake(ptls_t *tls);
+/**
+ * returns a pointer to user data pointer (client is reponsible for freeing the associated data prior to calling ptls_free)
+ */
+void **ptls_get_data_ptr(ptls_t *tls);
+/**
+ * proceeds with the handshake, optionally taking some input from peer. The function returns zero in case the handshake completed
+ * successfully. PTLS_ERROR_IN_PROGRESS is returned in case the handshake is incomplete. Otherwise, an error value is returned. The
+ * contents of sendbuf should be sent to the client, regardless of whether if an error is returned. inlen is an argument used for
+ * both input and output. As an input, the arguments takes the size of the data available as input. Upon return the value is updated
+ * to the number of bytes consumed by the handshake. In case the returned value is PTLS_ERROR_IN_PROGRESS there is a guarantee that
+ * all the input are consumed (i.e. the value of inlen does not change).
+ */
+int ptls_handshake(ptls_t *tls, ptls_buffer_t *sendbuf, const void *input, size_t *inlen, ptls_handshake_properties_t *args);
+/**
+ * decrypts the first record within given buffer
+ */
+int ptls_receive(ptls_t *tls, ptls_buffer_t *plaintextbuf, const void *input, size_t *len);
+/**
+ * encrypts given buffer into multiple TLS records
+ */
+int ptls_send(ptls_t *tls, ptls_buffer_t *sendbuf, const void *input, size_t inlen);
+/**
+ * returns per-record overhead
+ */
+size_t ptls_get_record_overhead(ptls_t *tls);
+/**
+ * sends an alert
+ */
+int ptls_send_alert(ptls_t *tls, ptls_buffer_t *sendbuf, uint8_t level, uint8_t description);
+/**
+ *
+ */
+int ptls_export_secret(ptls_t *tls, void *output, size_t outlen, const char *label, ptls_iovec_t context_value, int is_early);
+/**
+ *
+ */
+ptls_hash_context_t *ptls_hmac_create(ptls_hash_algorithm_t *algo, const void *key, size_t key_size);
+/**
+ *
+ */
+int ptls_hkdf_extract(ptls_hash_algorithm_t *hash, void *output, ptls_iovec_t salt, ptls_iovec_t ikm);
+/**
+ *
+ */
+int ptls_hkdf_expand(ptls_hash_algorithm_t *hash, void *output, size_t outlen, ptls_iovec_t prk, ptls_iovec_t info);
+/**
+ *
+ */
+int ptls_hkdf_expand_label(ptls_hash_algorithm_t *algo, void *output, size_t outlen, ptls_iovec_t secret, const char *label,
+ ptls_iovec_t hash_value, const char *base_label);
+/**
+ * instantiates a symmetric cipher
+ */
+ptls_cipher_context_t *ptls_cipher_new(ptls_cipher_algorithm_t *algo, int is_enc, const void *key);
+/**
+ * destroys a symmetric cipher
+ */
+void ptls_cipher_free(ptls_cipher_context_t *ctx);
+/**
+ * initializes the IV; this function must be called prior to calling ptls_cipher_encrypt
+ */
+static void ptls_cipher_init(ptls_cipher_context_t *ctx, const void *iv);
+/**
+ * encrypts given text
+ */
+static void ptls_cipher_encrypt(ptls_cipher_context_t *ctx, void *output, const void *input, size_t len);
+/**
+ * instantiates an AEAD cipher given a secret, which is expanded using hkdf to a set of key and iv
+ * @param aead
+ * @param hash
+ * @param is_enc 1 if creating a context for encryption, 0 if creating a context for decryption
+ * @param secret the secret. The size must be the digest length of the hash algorithm
+ * @return pointer to an AEAD context if successful, otherwise NULL
+ */
+ptls_aead_context_t *ptls_aead_new(ptls_aead_algorithm_t *aead, ptls_hash_algorithm_t *hash, int is_enc, const void *secret,
+ const char *base_label);
+/**
+ * destroys an AEAD cipher context
+ */
+void ptls_aead_free(ptls_aead_context_t *ctx);
+/**
+ *
+ */
+size_t ptls_aead_encrypt(ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen, uint64_t seq, const void *aad,
+ size_t aadlen);
+/**
+ * initializes the internal state of the encryptor
+ */
+static void ptls_aead_encrypt_init(ptls_aead_context_t *ctx, uint64_t seq, const void *aad, size_t aadlen);
+/**
+ * encrypts the input and updates the GCM state
+ * @return number of bytes emitted to output
+ */
+static size_t ptls_aead_encrypt_update(ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen);
+/**
+ * emits buffered data (if any) and the GCM tag
+ * @return number of bytes emitted to output
+ */
+static size_t ptls_aead_encrypt_final(ptls_aead_context_t *ctx, void *output);
+/**
+ * decrypts an AEAD record
+ * @return number of bytes emitted to output if successful, or SIZE_MAX if the input is invalid (e.g. broken MAC)
+ */
+static size_t ptls_aead_decrypt(ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen, uint64_t seq,
+ const void *aad, size_t aadlen);
+/**
+ * internal
+ */
+void ptls_aead__build_iv(ptls_aead_context_t *ctx, uint8_t *iv, uint64_t seq);
+/**
+ * clears memory
+ */
+extern void (*volatile ptls_clear_memory)(void *p, size_t len);
+/**
+ *
+ */
+static ptls_iovec_t ptls_iovec_init(const void *p, size_t len);
+
+/* inline functions */
+inline ptls_iovec_t ptls_iovec_init(const void *p, size_t len)
+{
+ /* avoid the "return (ptls_iovec_t){(uint8_t *)p, len};" construct because it requires C99
+ * and triggers a warning "C4204: nonstandard extension used: non-constant aggregate initializer"
+ * in Visual Studio */
+ ptls_iovec_t r;
+ r.base = (uint8_t *)p;
+ r.len = len;
+ return r;
+}
+
+inline void ptls_buffer_init(ptls_buffer_t *buf, void *smallbuf, size_t smallbuf_size)
+{
+ assert(smallbuf != NULL);
+ buf->base = (uint8_t *)smallbuf;
+ buf->off = 0;
+ buf->capacity = smallbuf_size;
+ buf->is_allocated = 0;
+}
+
+inline void ptls_buffer_dispose(ptls_buffer_t *buf)
+{
+ ptls_buffer__release_memory(buf);
+ *buf = (ptls_buffer_t){NULL};
+}
+
+inline void ptls_cipher_init(ptls_cipher_context_t *ctx, const void *iv)
+{
+ ctx->do_init(ctx, iv);
+}
+
+inline void ptls_cipher_encrypt(ptls_cipher_context_t *ctx, void *output, const void *input, size_t len)
+{
+ ctx->do_transform(ctx, output, input, len);
+}
+
+inline void ptls_aead_encrypt_init(ptls_aead_context_t *ctx, uint64_t seq, const void *aad, size_t aadlen)
+{
+ uint8_t iv[PTLS_MAX_IV_SIZE];
+
+ ptls_aead__build_iv(ctx, iv, seq);
+ ctx->do_encrypt_init(ctx, iv, aad, aadlen);
+}
+
+inline size_t ptls_aead_encrypt_update(ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen)
+{
+ return ctx->do_encrypt_update(ctx, output, input, inlen);
+}
+
+inline size_t ptls_aead_encrypt_final(ptls_aead_context_t *ctx, void *output)
+{
+ return ctx->do_encrypt_final(ctx, output);
+}
+
+inline size_t ptls_aead_decrypt(ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen, uint64_t seq,
+ const void *aad, size_t aadlen)
+{
+ uint8_t iv[PTLS_MAX_IV_SIZE];
+
+ ptls_aead__build_iv(ctx, iv, seq);
+ return ctx->do_decrypt(ctx, output, input, inlen, iv, aad, aadlen);
+}
+
+int ptls_load_certificates(ptls_context_t *ctx, char *cert_pem_file);
+
+extern ptls_get_time_t ptls_get_time;
+
+#define ptls_define_hash(name, ctx_type, init_func, update_func, final_func) \
+ \
+ struct name##_context_t { \
+ ptls_hash_context_t super; \
+ ctx_type ctx; \
+ }; \
+ \
+ static void name##_update(ptls_hash_context_t *_ctx, const void *src, size_t len) \
+ { \
+ struct name##_context_t *ctx = (struct name##_context_t *)_ctx; \
+ update_func(&ctx->ctx, src, len); \
+ } \
+ \
+ static void name##_final(ptls_hash_context_t *_ctx, void *md, ptls_hash_final_mode_t mode) \
+ { \
+ struct name##_context_t *ctx = (struct name##_context_t *)_ctx; \
+ if (mode == PTLS_HASH_FINAL_MODE_SNAPSHOT) { \
+ ctx_type copy = ctx->ctx; \
+ final_func(&copy, md); \
+ ptls_clear_memory(&copy, sizeof(copy)); \
+ return; \
+ } \
+ if (md != NULL) \
+ final_func(&ctx->ctx, md); \
+ switch (mode) { \
+ case PTLS_HASH_FINAL_MODE_FREE: \
+ ptls_clear_memory(&ctx->ctx, sizeof(ctx->ctx)); \
+ free(ctx); \
+ break; \
+ case PTLS_HASH_FINAL_MODE_RESET: \
+ init_func(&ctx->ctx); \
+ break; \
+ default: \
+ assert(!"FIXME"); \
+ break; \
+ } \
+ } \
+ \
+ static ptls_hash_context_t *name##_clone(ptls_hash_context_t *_src) \
+ { \
+ struct name##_context_t *dst, *src = (struct name##_context_t *)_src; \
+ if ((dst = malloc(sizeof(*dst))) == NULL) \
+ return NULL; \
+ *dst = *src; \
+ return &dst->super; \
+ } \
+ \
+ static ptls_hash_context_t *name##_create(void) \
+ { \
+ struct name##_context_t *ctx; \
+ if ((ctx = malloc(sizeof(*ctx))) == NULL) \
+ return NULL; \
+ ctx->super = (ptls_hash_context_t){name##_update, name##_final, name##_clone}; \
+ init_func(&ctx->ctx); \
+ return &ctx->super; \
+ }
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-13 00:44:18 +0000