1 files changed, 251 insertions, 0 deletions

diff --git a/src/lib/libssl/dtls_locl.h b/src/lib/libssl/dtls_locl.h
new file mode 100644
index 0000000000..9bf1fe6661
--- /dev/null
+++ b/src/lib/libssl/dtls_locl.h
@@ -0,0 +1,251 @@
+/* $OpenBSD: dtls_locl.h,v 1.1 2021/05/16 13:56:30 jsing Exp $ */
+/*
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#ifndef HEADER_DTLS_LOCL_H
+#define HEADER_DTLS_LOCL_H
+
+#include <sys/time.h>
+
+#include <openssl/dtls1.h>
+
+#include "ssl_locl.h"
+
+__BEGIN_HIDDEN_DECLS
+
+typedef struct dtls1_bitmap_st {
+        unsigned long map;              /* track 32 packets on 32-bit systems
+                                           and 64 - on 64-bit systems */
+        unsigned char max_seq_num[8];   /* max record number seen so far,
+                                           64-bit value in big-endian
+                                           encoding */
+} DTLS1_BITMAP;
+
+struct dtls1_retransmit_state {
+        EVP_CIPHER_CTX *enc_write_ctx;  /* cryptographic state */
+        EVP_MD_CTX *write_hash;         /* used for mac generation */
+        SSL_SESSION *session;
+        unsigned short epoch;
+};
+
+struct hm_header_st {
+        unsigned char type;
+        unsigned long msg_len;
+        unsigned short seq;
+        unsigned long frag_off;
+        unsigned long frag_len;
+        unsigned int is_ccs;
+        struct dtls1_retransmit_state saved_retransmit_state;
+};
+
+struct ccs_header_st {
+        unsigned char type;
+        unsigned short seq;
+};
+
+struct dtls1_timeout_st {
+        /* Number of read timeouts so far */
+        unsigned int read_timeouts;
+
+        /* Number of write timeouts so far */
+        unsigned int write_timeouts;
+
+        /* Number of alerts received so far */
+        unsigned int num_alerts;
+};
+
+struct _pqueue;
+
+typedef struct record_pqueue_st {
+        unsigned short epoch;
+        struct _pqueue *q;
+} record_pqueue;
+
+typedef struct hm_fragment_st {
+        struct hm_header_st msg_header;
+        unsigned char *fragment;
+        unsigned char *reassembly;
+} hm_fragment;
+
+typedef struct dtls1_record_data_internal_st {
+        unsigned char *packet;
+        unsigned int packet_length;
+        SSL3_BUFFER_INTERNAL rbuf;
+        SSL3_RECORD_INTERNAL rrec;
+} DTLS1_RECORD_DATA_INTERNAL;
+
+struct dtls1_state_internal_st;
+
+typedef struct dtls1_state_internal_st {
+        unsigned int send_cookie;
+        unsigned char cookie[DTLS1_COOKIE_LENGTH];
+        unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH];
+        unsigned int cookie_len;
+
+        /*
+         * The current data and handshake epoch.  This is initially
+         * undefined, and starts at zero once the initial handshake is
+         * completed
+         */
+        unsigned short r_epoch;
+
+        /* records being received in the current epoch */
+        DTLS1_BITMAP bitmap;
+
+        /* renegotiation starts a new set of sequence numbers */
+        DTLS1_BITMAP next_bitmap;
+
+        /* handshake message numbers */
+        unsigned short handshake_write_seq;
+        unsigned short next_handshake_write_seq;
+
+        unsigned short handshake_read_seq;
+
+        /* Received handshake records (processed and unprocessed) */
+        record_pqueue unprocessed_rcds;
+        record_pqueue processed_rcds;
+
+        /* Buffered handshake messages */
+        struct _pqueue *buffered_messages;
+
+        /* Buffered application records.
+         * Only for records between CCS and Finished
+         * to prevent either protocol violation or
+         * unnecessary message loss.
+         */
+        record_pqueue buffered_app_data;
+
+        /* Is set when listening for new connections with dtls1_listen() */
+        unsigned int listen;
+
+        unsigned int mtu; /* max DTLS packet size */
+
+        struct hm_header_st w_msg_hdr;
+        struct hm_header_st r_msg_hdr;
+
+        struct dtls1_timeout_st timeout;
+
+        /* storage for Alert/Handshake protocol data received but not
+         * yet processed by ssl3_read_bytes: */
+        unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH];
+        unsigned int alert_fragment_len;
+        unsigned char handshake_fragment[DTLS1_HM_HEADER_LENGTH];
+        unsigned int handshake_fragment_len;
+
+        unsigned int retransmitting;
+        unsigned int change_cipher_spec_ok;
+} DTLS1_STATE_INTERNAL;
+#define D1I(s) (s->d1->internal)
+
+typedef struct dtls1_state_st {
+        /* Buffered (sent) handshake records */
+        struct _pqueue *sent_messages;
+
+        /* Indicates when the last handshake msg or heartbeat sent will timeout */
+        struct timeval next_timeout;
+
+        /* Timeout duration */
+        unsigned short timeout_duration;
+
+        struct dtls1_state_internal_st *internal;
+} DTLS1_STATE;
+
+int dtls1_do_write(SSL *s, int type);
+int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
+void dtls1_set_message_header(SSL *s, unsigned char mt, unsigned long len,
+    unsigned long frag_off, unsigned long frag_len);
+void dtls1_set_message_header_int(SSL *s, unsigned char mt,
+    unsigned long len, unsigned short seq_num, unsigned long frag_off,
+    unsigned long frag_len);
+
+int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf, int len);
+int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
+
+int dtls1_read_failed(SSL *s, int code);
+int dtls1_buffer_message(SSL *s, int ccs);
+int dtls1_retransmit_message(SSL *s, unsigned short seq,
+    unsigned long frag_off, int *found);
+int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
+int dtls1_retransmit_buffered_messages(SSL *s);
+void dtls1_clear_record_buffer(SSL *s);
+int dtls1_get_message_header(unsigned char *data,
+    struct hm_header_st *msg_hdr);
+void dtls1_get_ccs_header(unsigned char *data, struct ccs_header_st *ccs_hdr);
+void dtls1_reset_read_seq_numbers(SSL *s);
+struct timeval* dtls1_get_timeout(SSL *s, struct timeval* timeleft);
+int dtls1_check_timeout_num(SSL *s);
+int dtls1_handle_timeout(SSL *s);
+const SSL_CIPHER *dtls1_get_cipher(unsigned int u);
+void dtls1_start_timer(SSL *s);
+void dtls1_stop_timer(SSL *s);
+int dtls1_is_timer_expired(SSL *s);
+void dtls1_double_timeout(SSL *s);
+unsigned int dtls1_min_mtu(void);
+
+int dtls1_new(SSL *s);
+void dtls1_free(SSL *s);
+void dtls1_clear(SSL *s);
+long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg);
+
+long dtls1_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok);
+int dtls1_get_record(SSL *s);
+int dtls1_dispatch_alert(SSL *s);
+
+__END_HIDDEN_DECLS
+
+#endif