1 #ifndef HEADER_CURL_VTLS_INT_H 2 #define HEADER_CURL_VTLS_INT_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 11 * 12 * This software is licensed as described in the file COPYING, which 13 * you should have received as part of this distribution. The terms 14 * are also available at https://curl.se/docs/copyright.html. 15 * 16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 17 * copies of the Software, and permit persons to whom the Software is 18 * furnished to do so, under the terms of the COPYING file. 19 * 20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 21 * KIND, either express or implied. 22 * 23 * SPDX-License-Identifier: curl 24 * 25 ***************************************************************************/ 26 #include "curl_setup.h" 27 #include "cfilters.h" 28 #include "urldata.h" 29 30 #ifdef USE_SSL 31 32 /* see https://www.iana.org/assignments/tls-extensiontype-values/ */ 33 #define ALPN_HTTP_1_1_LENGTH 8 34 #define ALPN_HTTP_1_1 "http/1.1" 35 #define ALPN_H2_LENGTH 2 36 #define ALPN_H2 "h2" 37 #define ALPN_H3_LENGTH 2 38 #define ALPN_H3 "h3" 39 40 /* conservative sizes on the ALPN entries and count we are handling, 41 * we can increase these if we ever feel the need or have to accommodate 42 * ALPN strings from the "outside". */ 43 #define ALPN_NAME_MAX 10 44 #define ALPN_ENTRIES_MAX 3 45 #define ALPN_PROTO_BUF_MAX (ALPN_ENTRIES_MAX * (ALPN_NAME_MAX + 1)) 46 47 struct alpn_spec { 48 const char entries[ALPN_ENTRIES_MAX][ALPN_NAME_MAX]; 49 size_t count; /* number of entries */ 50 }; 51 52 struct alpn_proto_buf { 53 unsigned char data[ALPN_PROTO_BUF_MAX]; 54 int len; 55 }; 56 57 CURLcode Curl_alpn_to_proto_buf(struct alpn_proto_buf *buf, 58 const struct alpn_spec *spec); 59 CURLcode Curl_alpn_to_proto_str(struct alpn_proto_buf *buf, 60 const struct alpn_spec *spec); 61 62 CURLcode Curl_alpn_set_negotiated(struct Curl_cfilter *cf, 63 struct Curl_easy *data, 64 const unsigned char *proto, 65 size_t proto_len); 66 67 /* enum for the nonblocking SSL connection state machine */ 68 typedef enum { 69 ssl_connect_1, 70 ssl_connect_2, 71 ssl_connect_3, 72 ssl_connect_done 73 } ssl_connect_state; 74 75 typedef enum { 76 ssl_connection_none, 77 ssl_connection_negotiating, 78 ssl_connection_complete 79 } ssl_connection_state; 80 81 #define CURL_SSL_IO_NEED_NONE (0) 82 #define CURL_SSL_IO_NEED_RECV (1<<0) 83 #define CURL_SSL_IO_NEED_SEND (1<<1) 84 85 /* Information in each SSL cfilter context: cf->ctx */ 86 struct ssl_connect_data { 87 struct ssl_peer peer; 88 const struct alpn_spec *alpn; /* ALPN to use or NULL for none */ 89 void *backend; /* vtls backend specific props */ 90 struct cf_call_data call_data; /* data handle used in current call */ 91 struct curltime handshake_done; /* time when handshake finished */ 92 ssl_connection_state state; 93 ssl_connect_state connecting_state; 94 int io_need; /* TLS signals special SEND/RECV needs */ 95 BIT(use_alpn); /* if ALPN shall be used in handshake */ 96 BIT(peer_closed); /* peer has closed connection */ 97 }; 98 99 100 #undef CF_CTX_CALL_DATA 101 #define CF_CTX_CALL_DATA(cf) \ 102 ((struct ssl_connect_data *)(cf)->ctx)->call_data 103 104 105 /* Definitions for SSL Implementations */ 106 107 struct Curl_ssl { 108 /* 109 * This *must* be the first entry to allow returning the list of available 110 * backends in curl_global_sslset(). 111 */ 112 curl_ssl_backend info; 113 unsigned int supports; /* bitfield, see above */ 114 size_t sizeof_ssl_backend_data; 115 116 int (*init)(void); 117 void (*cleanup)(void); 118 119 size_t (*version)(char *buffer, size_t size); 120 int (*check_cxn)(struct Curl_cfilter *cf, struct Curl_easy *data); 121 CURLcode (*shut_down)(struct Curl_cfilter *cf, struct Curl_easy *data, 122 bool send_shutdown, bool *done); 123 bool (*data_pending)(struct Curl_cfilter *cf, 124 const struct Curl_easy *data); 125 126 /* return 0 if a find random is filled in */ 127 CURLcode (*random)(struct Curl_easy *data, unsigned char *entropy, 128 size_t length); 129 bool (*cert_status_request)(void); 130 131 CURLcode (*connect_blocking)(struct Curl_cfilter *cf, 132 struct Curl_easy *data); 133 CURLcode (*connect_nonblocking)(struct Curl_cfilter *cf, 134 struct Curl_easy *data, 135 bool *done); 136 137 /* During handshake/shutdown, adjust the pollset to include the socket 138 * for POLLOUT or POLLIN as needed. Mandatory. */ 139 void (*adjust_pollset)(struct Curl_cfilter *cf, struct Curl_easy *data, 140 struct easy_pollset *ps); 141 void *(*get_internals)(struct ssl_connect_data *connssl, CURLINFO info); 142 void (*close)(struct Curl_cfilter *cf, struct Curl_easy *data); 143 void (*close_all)(struct Curl_easy *data); 144 145 CURLcode (*set_engine)(struct Curl_easy *data, const char *engine); 146 CURLcode (*set_engine_default)(struct Curl_easy *data); 147 struct curl_slist *(*engines_list)(struct Curl_easy *data); 148 149 bool (*false_start)(void); 150 CURLcode (*sha256sum)(const unsigned char *input, size_t inputlen, 151 unsigned char *sha256sum, size_t sha256sumlen); 152 153 bool (*attach_data)(struct Curl_cfilter *cf, struct Curl_easy *data); 154 void (*detach_data)(struct Curl_cfilter *cf, struct Curl_easy *data); 155 156 ssize_t (*recv_plain)(struct Curl_cfilter *cf, struct Curl_easy *data, 157 char *buf, size_t len, CURLcode *code); 158 ssize_t (*send_plain)(struct Curl_cfilter *cf, struct Curl_easy *data, 159 const void *mem, size_t len, CURLcode *code); 160 161 CURLcode (*get_channel_binding)(struct Curl_easy *data, int sockindex, 162 struct dynbuf *binding); 163 164 }; 165 166 extern const struct Curl_ssl *Curl_ssl; 167 168 169 int Curl_none_init(void); 170 void Curl_none_cleanup(void); 171 CURLcode Curl_none_shutdown(struct Curl_cfilter *cf, struct Curl_easy *data, 172 bool send_shutdown, bool *done); 173 int Curl_none_check_cxn(struct Curl_cfilter *cf, struct Curl_easy *data); 174 void Curl_none_close_all(struct Curl_easy *data); 175 void Curl_none_session_free(void *ptr); 176 bool Curl_none_data_pending(struct Curl_cfilter *cf, 177 const struct Curl_easy *data); 178 bool Curl_none_cert_status_request(void); 179 CURLcode Curl_none_set_engine(struct Curl_easy *data, const char *engine); 180 CURLcode Curl_none_set_engine_default(struct Curl_easy *data); 181 struct curl_slist *Curl_none_engines_list(struct Curl_easy *data); 182 bool Curl_none_false_start(void); 183 void Curl_ssl_adjust_pollset(struct Curl_cfilter *cf, struct Curl_easy *data, 184 struct easy_pollset *ps); 185 186 /** 187 * Get the SSL filter below the given one or NULL if there is none. 188 */ 189 bool Curl_ssl_cf_is_proxy(struct Curl_cfilter *cf); 190 191 /* extract a session ID 192 * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock). 193 * Caller must make sure that the ownership of returned sessionid object 194 * is properly taken (e.g. its refcount is incremented 195 * under sessionid mutex). 196 */ 197 bool Curl_ssl_getsessionid(struct Curl_cfilter *cf, 198 struct Curl_easy *data, 199 const struct ssl_peer *peer, 200 void **ssl_sessionid, 201 size_t *idsize); /* set 0 if unknown */ 202 203 /* Set a TLS session ID for `peer`. Replaces an existing session ID if 204 * not already the very same. 205 * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock). 206 * Call takes ownership of `ssl_sessionid`, using `sessionid_free_cb` 207 * to deallocate it. Is called in all outcomes, either right away or 208 * later when the session cache is cleaned up. 209 * Caller must ensure that it has properly shared ownership of this sessionid 210 * object with cache (e.g. incrementing refcount on success) 211 */ 212 CURLcode Curl_ssl_set_sessionid(struct Curl_cfilter *cf, 213 struct Curl_easy *data, 214 const struct ssl_peer *peer, 215 void *sessionid, 216 size_t sessionid_size, 217 Curl_ssl_sessionid_dtor *sessionid_free_cb); 218 219 #include "openssl.h" /* OpenSSL versions */ 220 #include "gtls.h" /* GnuTLS versions */ 221 #include "wolfssl.h" /* wolfSSL versions */ 222 #include "schannel.h" /* Schannel SSPI version */ 223 #include "sectransp.h" /* SecureTransport (Darwin) version */ 224 #include "mbedtls.h" /* mbedTLS versions */ 225 #include "bearssl.h" /* BearSSL versions */ 226 #include "rustls.h" /* Rustls versions */ 227 228 #endif /* USE_SSL */ 229 230 #endif /* HEADER_CURL_VTLS_INT_H */ 231
