290 lines
8.5 KiB
C
290 lines
8.5 KiB
C
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/*
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* Copyright (c) 2007, Cameron Rich
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of the axTLS project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file tls1.h
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*
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* @brief The definitions for the TLS library.
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*/
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#ifndef HEADER_SSL_LIB_H
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#define HEADER_SSL_LIB_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "version.h"
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#include "crypto.h"
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#include "os_port.h"
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#include "crypto_misc.h"
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#define SSL_RANDOM_SIZE 32
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#define SSL_SECRET_SIZE 48
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#define SSL_FINISHED_HASH_SIZE 12
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#define SSL_RECORD_SIZE 5
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#define SSL_SERVER_READ 0
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#define SSL_SERVER_WRITE 1
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#define SSL_CLIENT_READ 2
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#define SSL_CLIENT_WRITE 3
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#define SSL_HS_HDR_SIZE 4
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/* the flags we use while establishing a connection */
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#define SSL_NEED_RECORD 0x0001
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#define SSL_TX_ENCRYPTED 0x0002
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#define SSL_RX_ENCRYPTED 0x0004
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#define SSL_SESSION_RESUME 0x0008
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#define SSL_IS_CLIENT 0x0010
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#define SSL_HAS_CERT_REQ 0x0020
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/* some macros to muck around with flag bits */
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#define SET_SSL_FLAG(A) (ssl->flag |= A)
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#define CLR_SSL_FLAG(A) (ssl->flag &= ~A)
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#define IS_SET_SSL_FLAG(A) (ssl->flag & A)
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#define MAX_KEY_BYTE_SIZE 512 /* for a 4096 bit key */
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#define RT_MAX_PLAIN_LENGTH 16384
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#define RT_EXTRA 1024
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#define BM_RECORD_OFFSET 5
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#ifdef CONFIG_SSL_SKELETON_MODE
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#define NUM_PROTOCOLS 1
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#else
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#define NUM_PROTOCOLS 4
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#endif
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#define PARANOIA_CHECK(A, B) if (A < B) { \
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ret = SSL_ERROR_INVALID_HANDSHAKE; goto error; }
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/* protocol types */
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enum
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{
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PT_CHANGE_CIPHER_SPEC = 20,
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PT_ALERT_PROTOCOL,
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PT_HANDSHAKE_PROTOCOL,
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PT_APP_PROTOCOL_DATA
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};
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/* handshaking types */
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enum
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{
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HS_HELLO_REQUEST,
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HS_CLIENT_HELLO,
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HS_SERVER_HELLO,
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HS_CERTIFICATE = 11,
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HS_SERVER_KEY_XCHG,
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HS_CERT_REQ,
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HS_SERVER_HELLO_DONE,
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HS_CERT_VERIFY,
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HS_CLIENT_KEY_XCHG,
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HS_FINISHED = 20
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};
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typedef struct
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{
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uint8_t cipher;
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uint8_t key_size;
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uint8_t iv_size;
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uint8_t key_block_size;
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uint8_t padding_size;
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uint8_t digest_size;
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hmac_func hmac;
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crypt_func encrypt;
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crypt_func decrypt;
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} cipher_info_t;
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struct _SSLObjLoader
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{
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uint8_t *buf;
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int len;
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};
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typedef struct _SSLObjLoader SSLObjLoader;
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typedef struct
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{
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time_t conn_time;
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uint8_t session_id[SSL_SESSION_ID_SIZE];
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uint8_t master_secret[SSL_SECRET_SIZE];
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} SSL_SESSION;
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typedef struct
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{
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uint8_t *buf;
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int size;
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} SSL_CERT;
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typedef struct
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{
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MD5_CTX md5_ctx;
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SHA1_CTX sha1_ctx;
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uint8_t final_finish_mac[SSL_FINISHED_HASH_SIZE];
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uint8_t *key_block;
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uint8_t master_secret[SSL_SECRET_SIZE];
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uint8_t client_random[SSL_RANDOM_SIZE]; /* client's random sequence */
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uint8_t server_random[SSL_RANDOM_SIZE]; /* server's random sequence */
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uint16_t bm_proc_index;
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} DISPOSABLE_CTX;
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struct _SSL
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{
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uint32_t flag;
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uint16_t need_bytes;
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uint16_t got_bytes;
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uint8_t record_type;
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uint8_t cipher;
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uint8_t sess_id_size;
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int16_t next_state;
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int16_t hs_status;
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DISPOSABLE_CTX *dc; /* temporary data which we'll get rid of soon */
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int client_fd;
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const cipher_info_t *cipher_info;
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void *encrypt_ctx;
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void *decrypt_ctx;
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uint8_t bm_all_data[RT_MAX_PLAIN_LENGTH+RT_EXTRA];
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uint8_t *bm_data;
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uint16_t bm_index;
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uint16_t bm_read_index;
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struct _SSL *next; /* doubly linked list */
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struct _SSL *prev;
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struct _SSL_CTX *ssl_ctx; /* back reference to a clnt/svr ctx */
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#ifndef CONFIG_SSL_SKELETON_MODE
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uint16_t session_index;
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SSL_SESSION *session;
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#endif
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#ifdef CONFIG_SSL_CERT_VERIFICATION
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X509_CTX *x509_ctx;
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#endif
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uint8_t session_id[SSL_SESSION_ID_SIZE];
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uint8_t client_mac[SHA1_SIZE]; /* for HMAC verification */
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uint8_t server_mac[SHA1_SIZE]; /* for HMAC verification */
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uint8_t read_sequence[8]; /* 64 bit sequence number */
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uint8_t write_sequence[8]; /* 64 bit sequence number */
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uint8_t hmac_header[SSL_RECORD_SIZE]; /* rx hmac */
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};
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typedef struct _SSL SSL;
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struct _SSL_CTX
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{
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uint32_t options;
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uint8_t chain_length;
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RSA_CTX *rsa_ctx;
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#ifdef CONFIG_SSL_CERT_VERIFICATION
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CA_CERT_CTX *ca_cert_ctx;
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#endif
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SSL *head;
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SSL *tail;
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SSL_CERT certs[CONFIG_SSL_MAX_CERTS];
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#ifndef CONFIG_SSL_SKELETON_MODE
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uint16_t num_sessions;
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SSL_SESSION **ssl_sessions;
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#endif
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#ifdef CONFIG_SSL_CTX_MUTEXING
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SSL_CTX_MUTEX_TYPE mutex;
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#endif
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#ifdef CONFIG_OPENSSL_COMPATIBLE
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void *bonus_attr;
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#endif
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};
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typedef struct _SSL_CTX SSL_CTX;
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/* backwards compatibility */
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typedef struct _SSL_CTX SSLCTX;
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extern const uint8_t ssl_prot_prefs[NUM_PROTOCOLS];
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SSL *ssl_new(SSL_CTX *ssl_ctx, int client_fd);
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void disposable_new(SSL *ssl);
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void disposable_free(SSL *ssl);
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int send_packet(SSL *ssl, uint8_t protocol,
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const uint8_t *in, int length);
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int do_svr_handshake(SSL *ssl, int handshake_type, uint8_t *buf, int hs_len);
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int do_clnt_handshake(SSL *ssl, int handshake_type, uint8_t *buf, int hs_len);
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int process_finished(SSL *ssl, int hs_len);
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int process_sslv23_client_hello(SSL *ssl);
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int send_alert(SSL *ssl, int error_code);
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int send_finished(SSL *ssl);
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int send_certificate(SSL *ssl);
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int basic_read(SSL *ssl, uint8_t **in_data);
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int send_change_cipher_spec(SSL *ssl);
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void finished_digest(SSL *ssl, const char *label, uint8_t *digest);
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void generate_master_secret(SSL *ssl, const uint8_t *premaster_secret);
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void add_packet(SSL *ssl, const uint8_t *pkt, int len);
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int add_cert(SSL_CTX *ssl_ctx, const uint8_t *buf, int len);
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int add_private_key(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj);
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void ssl_obj_free(SSLObjLoader *ssl_obj);
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int pkcs8_decode(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj, const char *password);
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int pkcs12_decode(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj, const char *password);
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int load_key_certs(SSL_CTX *ssl_ctx);
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#ifdef CONFIG_SSL_CERT_VERIFICATION
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int add_cert_auth(SSL_CTX *ssl_ctx, const uint8_t *buf, int len);
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void remove_ca_certs(CA_CERT_CTX *ca_cert_ctx);
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#endif
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#ifdef CONFIG_SSL_ENABLE_CLIENT
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int do_client_connect(SSL *ssl);
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#endif
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#ifdef CONFIG_SSL_FULL_MODE
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void DISPLAY_STATE(SSL *ssl, int is_send, uint8_t state, int not_ok);
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void DISPLAY_BYTES(SSL *ssl, const char *format,
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const uint8_t *data, int size, ...);
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void DISPLAY_CERT(SSL *ssl, const X509_CTX *x509_ctx);
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void DISPLAY_RSA(SSL *ssl, const RSA_CTX *rsa_ctx);
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void DISPLAY_ALERT(SSL *ssl, int alert);
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#else
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#define DISPLAY_STATE(A,B,C,D)
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#define DISPLAY_CERT(A,B)
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#define DISPLAY_RSA(A,B)
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#define DISPLAY_ALERT(A, B)
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#ifdef WIN32
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void DISPLAY_BYTES(SSL *ssl, const char *format,/* win32 has no variadic macros */
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const uint8_t *data, int size, ...);
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#else
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#define DISPLAY_BYTES(A,B,C,D,...)
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#endif
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#endif
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#ifdef CONFIG_SSL_CERT_VERIFICATION
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int process_certificate(SSL *ssl, X509_CTX **x509_ctx);
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#endif
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SSL_SESSION *ssl_session_update(int max_sessions,
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SSL_SESSION *ssl_sessions[], SSL *ssl,
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const uint8_t *session_id);
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void kill_ssl_session(SSL_SESSION **ssl_sessions, SSL *ssl);
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#ifdef __cplusplus
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}
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#endif
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#endif
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