torrentd

simple torrent daemon
git clone git@git.2f30.org/torrentd.git
Log | Files | Refs | LICENSE

commit 4d84adbdc134b2f4a9aeb1ac895cbc86dafdff28
Author: sin <sin@2f30.org>
Date:   Thu, 17 Dec 2015 11:37:59 +0000

Initial import

Diffstat:
AMakefile | 35+++++++++++++++++++++++++++++++++++
Aben.c | 250+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Aqueue.h | 536+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Asbtd.c | 28++++++++++++++++++++++++++++
Asbtd.h | 45+++++++++++++++++++++++++++++++++++++++++++++
Asha1.c | 144+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Asha1.h | 18++++++++++++++++++
Autil.c | 98+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
8 files changed, 1154 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile @@ -0,0 +1,35 @@ +VERSION = 0.0 + +PREFIX = /usr/local + +CPPFLAGS = -D_DEFAULT_SOURCE +CFLAGS = -g -std=c99 -Wall -Wextra +LDFLAGS = + +OBJ =\ + ben.o\ + sbtd.o\ + sha1.o\ + util.o + +BIN = sbtd + +all: $(BIN) + +$(BIN): $(OBJ) + $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS) + +$(OBJ): queue.h sbtd.h sha1.h + +install: all + mkdir -p $(DESTDIR)$(PREFIX)/bin + cp -f $(BIN) $(DESTDIR)$(PREFIX)/bin + +uninstall: + rm -f $(DESTDIR)$(PREFIX)/bin/$(BIN) + +clean: + rm -f $(BIN) $(OBJ) + +.PHONY: + all install uninstall clean diff --git a/ben.c b/ben.c @@ -0,0 +1,250 @@ +/* + * Copyright (c) 2015 Dimitris Papastamos <sin@2f30.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <ctype.h> +#include <err.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "sbtd.h" + +static char * +parsestr(char *s, char *e, struct ben **b) +{ + char *p; + long long int len = 0; + + for (p = s; p != e && isdigit((int)*p); p++) + len = len * 10 + *p - '0'; + if (p == e) + goto eof; + if (*p != ':') + errx(1, "expected :, got %c", *p); + if (p + len >= e) + goto eof; + p += len; + *b = emalloc(sizeof(**b)); + (*b)->type = 's'; + (*b)->s = &p[-len]; + (*b)->start = s; + (*b)->end = p + 1; + (*b)->len = len; + return p; +eof: + errx(1, "bad string"); +} + +static char * +parseint(char *s, char *e, struct ben **b) +{ + char *p = s; + long long int v; + int isneg = 0, iszero = 0; + + if (*p != 'i') + errx(1, "expected integer"); + if (++p == e) + errx(1, "bad integer"); + + switch (*p) { + case '-': + isneg = 1; + break; + case '0': + /* i0e is the only valid representation of zero */ + iszero = 1; + break; + default: + p--; + break; + } + + v = 0; + while (1) { + if (++p == e) + errx(1, "bad integer"); + if (*p == 'e' || iszero) { + if (*p != 'e') + errx(1, "0 not followed by e"); + break; + } + if (isneg && *p == '0') + errx(1, "i-0 is invalid"); + if (!isdigit((int)*p)) + errx(1, "unexpected char in integer %c", *p); + v = v * 10 + *p - '0'; + } + + *b = emalloc(sizeof(**b)); + (*b)->type = 'i'; + (*b)->start = s; + (*b)->end = p + 1; + (*b)->i = isneg ? -v : v; + return p; +} + +static char * +parsedl(char *s, char *e, struct ben **b) +{ + char *p = s; + struct ben head; + struct ben *bp = &head; + int type = *p; + + memset(&head, 0, sizeof(head)); + if (*p != 'd' && *p != 'l') + errx(1, "expected dictionary or list"); + while (1) { + if (++p == e) + errx(1, "bad dictionary or list"); + if (*p == 'e') + break; + bp->next = emalloc(sizeof(*bp)); + bp = bp->next; + bp->type = type; + bp->k = NULL; + if (type == 'd') { + p = parsestr(p, e, &bp->k); + p++; + } + p = bdecode(p, e, &bp->v); + bp->next = NULL; + } + if (*p != 'e') + errx(1, "expected terminator"); + + *b = head.next; + if (!head.next) { + *b = malloc(sizeof(**b)); + (*b)->type = type; + (*b)->k = NULL; + (*b)->v = NULL; + (*b)->next = NULL; + } + (*b)->start = s; + (*b)->end = p + 1; + return p; +} + +char * +bdecode(char *s, char *e, struct ben **b) +{ + if (s == e) + return s; + switch (*s) { + case 'i': + return parseint(s, e, b); + break; + case 'l': + case 'd': + return parsedl(s, e, b); + break; + default: + if (!isdigit((int)*s)) + errx(1, "unknown type %c", *s); + return parsestr(s, e, b); + } +} + +void +bencode(char **buf, size_t *n, struct ben *b) +{ + *n = b->end - b->start; + *buf = emalloc(*n); + memcpy(*buf, b->start, *n); +} + +char * +bstr2str(struct ben *b) +{ + char *s; + + s = emalloc(b->len + 1); + memcpy(s, b->s, b->len); + s[b->len] = '\0'; + return s; +} + +int +bstrcmp(struct ben *a, struct ben *b) +{ + long long int i; + + if (a->type != 's' || b->type != 's') + errx(1, "bstrcmp expects a string"); + if (a->len != b->len) + return 1; + for (i = 0; i < a->len; i++) + if (a->s[i] != b->s[i]) + return 1; + return 0; +} + +struct ben * +dlook(struct ben *d, struct ben *k) +{ + struct ben *b; + + if (d->type != 'd') + errx(1, "dlook expects a dictionary"); + if (k->type != 's') + errx(1, "dlook requires key to be a string"); + for (b = d; b; b = b->next) + if (!bstrcmp(b->k, k)) + return b->v; + return NULL; +} + +struct ben * +dlookstr(struct ben *d, char *s) +{ + struct ben k; + + k.type = 's'; + k.s = s; + k.len = strlen(s); + return dlook(d, &k); +} + +void +bfree(struct ben *b) +{ + struct ben *bp, *btmp; + + if (!b) + return; + switch (b->type) { + case 's': + free(b); + break; + case 'i': + free(b); + break; + case 'l': + case 'd': + bp = b; + while (bp) { + btmp = bp->next; + bfree(bp->k); + bfree(bp->v); + free(bp); + bp = btmp; + } + break; + } +} diff --git a/queue.h b/queue.h @@ -0,0 +1,536 @@ +/* $OpenBSD: queue.h,v 1.42 2015/11/19 21:03:36 millert Exp $ */ +/* $NetBSD: queue.h,v 1.11 1996/05/16 05:17:14 mycroft Exp $ */ + +/* + * Copyright (c) 1991, 1993 + * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS 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 REGENTS OR 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. + * + * @(#)queue.h 8.5 (Berkeley) 8/20/94 + */ + +#ifndef _SYS_QUEUE_H_ +#define _SYS_QUEUE_H_ + +/* + * This file defines five types of data structures: singly-linked lists, + * lists, simple queues, tail queues, and circular queues. + * + * + * A singly-linked list is headed by a single forward pointer. The elements + * are singly linked for minimum space and pointer manipulation overhead at + * the expense of O(n) removal for arbitrary elements. New elements can be + * added to the list after an existing element or at the head of the list. + * Elements being removed from the head of the list should use the explicit + * macro for this purpose for optimum efficiency. A singly-linked list may + * only be traversed in the forward direction. Singly-linked lists are ideal + * for applications with large datasets and few or no removals or for + * implementing a LIFO queue. + * + * A list is headed by a single forward pointer (or an array of forward + * pointers for a hash table header). The elements are doubly linked + * so that an arbitrary element can be removed without a need to + * traverse the list. New elements can be added to the list before + * or after an existing element or at the head of the list. A list + * may only be traversed in the forward direction. + * + * A simple queue is headed by a pair of pointers, one the head of the + * list and the other to the tail of the list. The elements are singly + * linked to save space, so elements can only be removed from the + * head of the list. New elements can be added to the list before or after + * an existing element, at the head of the list, or at the end of the + * list. A simple queue may only be traversed in the forward direction. + * + * A tail queue is headed by a pair of pointers, one to the head of the + * list and the other to the tail of the list. The elements are doubly + * linked so that an arbitrary element can be removed without a need to + * traverse the list. New elements can be added to the list before or + * after an existing element, at the head of the list, or at the end of + * the list. A tail queue may be traversed in either direction. + * + * A circle queue is headed by a pair of pointers, one to the head of the + * list and the other to the tail of the list. The elements are doubly + * linked so that an arbitrary element can be removed without a need to + * traverse the list. New elements can be added to the list before or after + * an existing element, at the head of the list, or at the end of the list. + * A circle queue may be traversed in either direction, but has a more + * complex end of list detection. + * + * For details on the use of these macros, see the queue(3) manual page. + */ + +#if defined(QUEUE_MACRO_DEBUG) || (defined(_KERNEL) && defined(DIAGNOSTIC)) +#define _Q_INVALIDATE(a) (a) = ((void *)-1) +#else +#define _Q_INVALIDATE(a) +#endif + +/* + * Singly-linked List definitions. + */ +#define SLIST_HEAD(name, type) \ +struct name { \ + struct type *slh_first; /* first element */ \ +} + +#define SLIST_HEAD_INITIALIZER(head) \ + { NULL } + +#define SLIST_ENTRY(type) \ +struct { \ + struct type *sle_next; /* next element */ \ +} + +/* + * Singly-linked List access methods. + */ +#define SLIST_FIRST(head) ((head)->slh_first) +#define SLIST_END(head) NULL +#define SLIST_EMPTY(head) (SLIST_FIRST(head) == SLIST_END(head)) +#define SLIST_NEXT(elm, field) ((elm)->field.sle_next) + +#define SLIST_FOREACH(var, head, field) \ + for((var) = SLIST_FIRST(head); \ + (var) != SLIST_END(head); \ + (var) = SLIST_NEXT(var, field)) + +#define SLIST_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = SLIST_FIRST(head); \ + (var) && ((tvar) = SLIST_NEXT(var, field), 1); \ + (var) = (tvar)) + +/* + * Singly-linked List functions. + */ +#define SLIST_INIT(head) { \ + SLIST_FIRST(head) = SLIST_END(head); \ +} + +#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \ + (elm)->field.sle_next = (slistelm)->field.sle_next; \ + (slistelm)->field.sle_next = (elm); \ +} while (0) + +#define SLIST_INSERT_HEAD(head, elm, field) do { \ + (elm)->field.sle_next = (head)->slh_first; \ + (head)->slh_first = (elm); \ +} while (0) + +#define SLIST_REMOVE_AFTER(elm, field) do { \ + (elm)->field.sle_next = (elm)->field.sle_next->field.sle_next; \ +} while (0) + +#define SLIST_REMOVE_HEAD(head, field) do { \ + (head)->slh_first = (head)->slh_first->field.sle_next; \ +} while (0) + +#define SLIST_REMOVE(head, elm, type, field) do { \ + if ((head)->slh_first == (elm)) { \ + SLIST_REMOVE_HEAD((head), field); \ + } else { \ + struct type *curelm = (head)->slh_first; \ + \ + while (curelm->field.sle_next != (elm)) \ + curelm = curelm->field.sle_next; \ + curelm->field.sle_next = \ + curelm->field.sle_next->field.sle_next; \ + } \ + _Q_INVALIDATE((elm)->field.sle_next); \ +} while (0) + +/* + * List definitions. + */ +#define LIST_HEAD(name, type) \ +struct name { \ + struct type *lh_first; /* first element */ \ +} + +#define LIST_HEAD_INITIALIZER(head) \ + { NULL } + +#define LIST_ENTRY(type) \ +struct { \ + struct type *le_next; /* next element */ \ + struct type **le_prev; /* address of previous next element */ \ +} + +/* + * List access methods + */ +#define LIST_FIRST(head) ((head)->lh_first) +#define LIST_END(head) NULL +#define LIST_EMPTY(head) (LIST_FIRST(head) == LIST_END(head)) +#define LIST_NEXT(elm, field) ((elm)->field.le_next) + +#define LIST_FOREACH(var, head, field) \ + for((var) = LIST_FIRST(head); \ + (var)!= LIST_END(head); \ + (var) = LIST_NEXT(var, field)) + +#define LIST_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = LIST_FIRST(head); \ + (var) && ((tvar) = LIST_NEXT(var, field), 1); \ + (var) = (tvar)) + +/* + * List functions. + */ +#define LIST_INIT(head) do { \ + LIST_FIRST(head) = LIST_END(head); \ +} while (0) + +#define LIST_INSERT_AFTER(listelm, elm, field) do { \ + if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \ + (listelm)->field.le_next->field.le_prev = \ + &(elm)->field.le_next; \ + (listelm)->field.le_next = (elm); \ + (elm)->field.le_prev = &(listelm)->field.le_next; \ +} while (0) + +#define LIST_INSERT_BEFORE(listelm, elm, field) do { \ + (elm)->field.le_prev = (listelm)->field.le_prev; \ + (elm)->field.le_next = (listelm); \ + *(listelm)->field.le_prev = (elm); \ + (listelm)->field.le_prev = &(elm)->field.le_next; \ +} while (0) + +#define LIST_INSERT_HEAD(head, elm, field) do { \ + if (((elm)->field.le_next = (head)->lh_first) != NULL) \ + (head)->lh_first->field.le_prev = &(elm)->field.le_next;\ + (head)->lh_first = (elm); \ + (elm)->field.le_prev = &(head)->lh_first; \ +} while (0) + +#define LIST_REMOVE(elm, field) do { \ + if ((elm)->field.le_next != NULL) \ + (elm)->field.le_next->field.le_prev = \ + (elm)->field.le_prev; \ + *(elm)->field.le_prev = (elm)->field.le_next; \ + _Q_INVALIDATE((elm)->field.le_prev); \ + _Q_INVALIDATE((elm)->field.le_next); \ +} while (0) + +#define LIST_REPLACE(elm, elm2, field) do { \ + if (((elm2)->field.le_next = (elm)->field.le_next) != NULL) \ + (elm2)->field.le_next->field.le_prev = \ + &(elm2)->field.le_next; \ + (elm2)->field.le_prev = (elm)->field.le_prev; \ + *(elm2)->field.le_prev = (elm2); \ + _Q_INVALIDATE((elm)->field.le_prev); \ + _Q_INVALIDATE((elm)->field.le_next); \ +} while (0) + +/* + * Simple queue definitions. + */ +#define SIMPLEQ_HEAD(name, type) \ +struct name { \ + struct type *sqh_first; /* first element */ \ + struct type **sqh_last; /* addr of last next element */ \ +} + +#define SIMPLEQ_HEAD_INITIALIZER(head) \ + { NULL, &(head).sqh_first } + +#define SIMPLEQ_ENTRY(type) \ +struct { \ + struct type *sqe_next; /* next element */ \ +} + +/* + * Simple queue access methods. + */ +#define SIMPLEQ_FIRST(head) ((head)->sqh_first) +#define SIMPLEQ_END(head) NULL +#define SIMPLEQ_EMPTY(head) (SIMPLEQ_FIRST(head) == SIMPLEQ_END(head)) +#define SIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next) + +#define SIMPLEQ_FOREACH(var, head, field) \ + for((var) = SIMPLEQ_FIRST(head); \ + (var) != SIMPLEQ_END(head); \ + (var) = SIMPLEQ_NEXT(var, field)) + +#define SIMPLEQ_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = SIMPLEQ_FIRST(head); \ + (var) && ((tvar) = SIMPLEQ_NEXT(var, field), 1); \ + (var) = (tvar)) + +/* + * Simple queue functions. + */ +#define SIMPLEQ_INIT(head) do { \ + (head)->sqh_first = NULL; \ + (head)->sqh_last = &(head)->sqh_first; \ +} while (0) + +#define SIMPLEQ_INSERT_HEAD(head, elm, field) do { \ + if (((elm)->field.sqe_next = (head)->sqh_first) == NULL) \ + (head)->sqh_last = &(elm)->field.sqe_next; \ + (head)->sqh_first = (elm); \ +} while (0) + +#define SIMPLEQ_INSERT_TAIL(head, elm, field) do { \ + (elm)->field.sqe_next = NULL; \ + *(head)->sqh_last = (elm); \ + (head)->sqh_last = &(elm)->field.sqe_next; \ +} while (0) + +#define SIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do { \ + if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL)\ + (head)->sqh_last = &(elm)->field.sqe_next; \ + (listelm)->field.sqe_next = (elm); \ +} while (0) + +#define SIMPLEQ_REMOVE_HEAD(head, field) do { \ + if (((head)->sqh_first = (head)->sqh_first->field.sqe_next) == NULL) \ + (head)->sqh_last = &(head)->sqh_first; \ +} while (0) + +#define SIMPLEQ_REMOVE_AFTER(head, elm, field) do { \ + if (((elm)->field.sqe_next = (elm)->field.sqe_next->field.sqe_next) \ + == NULL) \ + (head)->sqh_last = &(elm)->field.sqe_next; \ +} while (0) + +#define SIMPLEQ_CONCAT(head1, head2) do { \ + if (!SIMPLEQ_EMPTY((head2))) { \ + *(head1)->sqh_last = (head2)->sqh_first; \ + (head1)->sqh_last = (head2)->sqh_last; \ + SIMPLEQ_INIT((head2)); \ + } \ +} while (0) + +/* + * XOR Simple queue definitions. + */ +#define XSIMPLEQ_HEAD(name, type) \ +struct name { \ + struct type *sqx_first; /* first element */ \ + struct type **sqx_last; /* addr of last next element */ \ + unsigned long sqx_cookie; \ +} + +#define XSIMPLEQ_ENTRY(type) \ +struct { \ + struct type *sqx_next; /* next element */ \ +} + +/* + * XOR Simple queue access methods. + */ +#define XSIMPLEQ_XOR(head, ptr) ((__typeof(ptr))((head)->sqx_cookie ^ \ + (unsigned long)(ptr))) +#define XSIMPLEQ_FIRST(head) XSIMPLEQ_XOR(head, ((head)->sqx_first)) +#define XSIMPLEQ_END(head) NULL +#define XSIMPLEQ_EMPTY(head) (XSIMPLEQ_FIRST(head) == XSIMPLEQ_END(head)) +#define XSIMPLEQ_NEXT(head, elm, field) XSIMPLEQ_XOR(head, ((elm)->field.sqx_next)) + + +#define XSIMPLEQ_FOREACH(var, head, field) \ + for ((var) = XSIMPLEQ_FIRST(head); \ + (var) != XSIMPLEQ_END(head); \ + (var) = XSIMPLEQ_NEXT(head, var, field)) + +#define XSIMPLEQ_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = XSIMPLEQ_FIRST(head); \ + (var) && ((tvar) = XSIMPLEQ_NEXT(head, var, field), 1); \ + (var) = (tvar)) + +/* + * XOR Simple queue functions. + */ +#define XSIMPLEQ_INIT(head) do { \ + arc4random_buf(&(head)->sqx_cookie, sizeof((head)->sqx_cookie)); \ + (head)->sqx_first = XSIMPLEQ_XOR(head, NULL); \ + (head)->sqx_last = XSIMPLEQ_XOR(head, &(head)->sqx_first); \ +} while (0) + +#define XSIMPLEQ_INSERT_HEAD(head, elm, field) do { \ + if (((elm)->field.sqx_next = (head)->sqx_first) == \ + XSIMPLEQ_XOR(head, NULL)) \ + (head)->sqx_last = XSIMPLEQ_XOR(head, &(elm)->field.sqx_next); \ + (head)->sqx_first = XSIMPLEQ_XOR(head, (elm)); \ +} while (0) + +#define XSIMPLEQ_INSERT_TAIL(head, elm, field) do { \ + (elm)->field.sqx_next = XSIMPLEQ_XOR(head, NULL); \ + *(XSIMPLEQ_XOR(head, (head)->sqx_last)) = XSIMPLEQ_XOR(head, (elm)); \ + (head)->sqx_last = XSIMPLEQ_XOR(head, &(elm)->field.sqx_next); \ +} while (0) + +#define XSIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do { \ + if (((elm)->field.sqx_next = (listelm)->field.sqx_next) == \ + XSIMPLEQ_XOR(head, NULL)) \ + (head)->sqx_last = XSIMPLEQ_XOR(head, &(elm)->field.sqx_next); \ + (listelm)->field.sqx_next = XSIMPLEQ_XOR(head, (elm)); \ +} while (0) + +#define XSIMPLEQ_REMOVE_HEAD(head, field) do { \ + if (((head)->sqx_first = XSIMPLEQ_XOR(head, \ + (head)->sqx_first)->field.sqx_next) == XSIMPLEQ_XOR(head, NULL)) \ + (head)->sqx_last = XSIMPLEQ_XOR(head, &(head)->sqx_first); \ +} while (0) + +#define XSIMPLEQ_REMOVE_AFTER(head, elm, field) do { \ + if (((elm)->field.sqx_next = XSIMPLEQ_XOR(head, \ + (elm)->field.sqx_next)->field.sqx_next) \ + == XSIMPLEQ_XOR(head, NULL)) \ + (head)->sqx_last = \ + XSIMPLEQ_XOR(head, &(elm)->field.sqx_next); \ +} while (0) + + +/* + * Tail queue definitions. + */ +#define TAILQ_HEAD(name, type) \ +struct name { \ + struct type *tqh_first; /* first element */ \ + struct type **tqh_last; /* addr of last next element */ \ +} + +#define TAILQ_HEAD_INITIALIZER(head) \ + { NULL, &(head).tqh_first } + +#define TAILQ_ENTRY(type) \ +struct { \ + struct type *tqe_next; /* next element */ \ + struct type **tqe_prev; /* address of previous next element */ \ +} + +/* + * tail queue access methods + */ +#define TAILQ_FIRST(head) ((head)->tqh_first) +#define TAILQ_END(head) NULL +#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next) +#define TAILQ_LAST(head, headname) \ + (*(((struct headname *)((head)->tqh_last))->tqh_last)) +/* XXX */ +#define TAILQ_PREV(elm, headname, field) \ + (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last)) +#define TAILQ_EMPTY(head) \ + (TAILQ_FIRST(head) == TAILQ_END(head)) + +#define TAILQ_FOREACH(var, head, field) \ + for((var) = TAILQ_FIRST(head); \ + (var) != TAILQ_END(head); \ + (var) = TAILQ_NEXT(var, field)) + +#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = TAILQ_FIRST(head); \ + (var) != TAILQ_END(head) && \ + ((tvar) = TAILQ_NEXT(var, field), 1); \ + (var) = (tvar)) + + +#define TAILQ_FOREACH_REVERSE(var, head, headname, field) \ + for((var) = TAILQ_LAST(head, headname); \ + (var) != TAILQ_END(head); \ + (var) = TAILQ_PREV(var, headname, field)) + +#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \ + for ((var) = TAILQ_LAST(head, headname); \ + (var) != TAILQ_END(head) && \ + ((tvar) = TAILQ_PREV(var, headname, field), 1); \ + (var) = (tvar)) + +/* + * Tail queue functions. + */ +#define TAILQ_INIT(head) do { \ + (head)->tqh_first = NULL; \ + (head)->tqh_last = &(head)->tqh_first; \ +} while (0) + +#define TAILQ_INSERT_HEAD(head, elm, field) do { \ + if (((elm)->field.tqe_next = (head)->tqh_first) != NULL) \ + (head)->tqh_first->field.tqe_prev = \ + &(elm)->field.tqe_next; \ + else \ + (head)->tqh_last = &(elm)->field.tqe_next; \ + (head)->tqh_first = (elm); \ + (elm)->field.tqe_prev = &(head)->tqh_first; \ +} while (0) + +#define TAILQ_INSERT_TAIL(head, elm, field) do { \ + (elm)->field.tqe_next = NULL; \ + (elm)->field.tqe_prev = (head)->tqh_last; \ + *(head)->tqh_last = (elm); \ + (head)->tqh_last = &(elm)->field.tqe_next; \ +} while (0) + +#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \ + if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\ + (elm)->field.tqe_next->field.tqe_prev = \ + &(elm)->field.tqe_next; \ + else \ + (head)->tqh_last = &(elm)->field.tqe_next; \ + (listelm)->field.tqe_next = (elm); \ + (elm)->field.tqe_prev = &(listelm)->field.tqe_next; \ +} while (0) + +#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \ + (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \ + (elm)->field.tqe_next = (listelm); \ + *(listelm)->field.tqe_prev = (elm); \ + (listelm)->field.tqe_prev = &(elm)->field.tqe_next; \ +} while (0) + +#define TAILQ_REMOVE(head, elm, field) do { \ + if (((elm)->field.tqe_next) != NULL) \ + (elm)->field.tqe_next->field.tqe_prev = \ + (elm)->field.tqe_prev; \ + else \ + (head)->tqh_last = (elm)->field.tqe_prev; \ + *(elm)->field.tqe_prev = (elm)->field.tqe_next; \ + _Q_INVALIDATE((elm)->field.tqe_prev); \ + _Q_INVALIDATE((elm)->field.tqe_next); \ +} while (0) + +#define TAILQ_REPLACE(head, elm, elm2, field) do { \ + if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != NULL) \ + (elm2)->field.tqe_next->field.tqe_prev = \ + &(elm2)->field.tqe_next; \ + else \ + (head)->tqh_last = &(elm2)->field.tqe_next; \ + (elm2)->field.tqe_prev = (elm)->field.tqe_prev; \ + *(elm2)->field.tqe_prev = (elm2); \ + _Q_INVALIDATE((elm)->field.tqe_prev); \ + _Q_INVALIDATE((elm)->field.tqe_next); \ +} while (0) + +#define TAILQ_CONCAT(head1, head2, field) do { \ + if (!TAILQ_EMPTY(head2)) { \ + *(head1)->tqh_last = (head2)->tqh_first; \ + (head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \ + (head1)->tqh_last = (head2)->tqh_last; \ + TAILQ_INIT((head2)); \ + } \ +} while (0) + +#endif /* !_SYS_QUEUE_H_ */ diff --git a/sbtd.c b/sbtd.c @@ -0,0 +1,28 @@ +/* + * Copyright (c) 2015 Dimitris Papastamos <sin@2f30.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "sbtd.h" + +int +main(void) +{ + return 0; +} diff --git a/sbtd.h b/sbtd.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2015 Dimitris Papastamos <sin@2f30.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +struct ben { + int type; + struct ben *k; + struct ben *v; + char *start, *end; + char *s; + long long int i; + long long int len; + struct ben *next; +}; + +/* ben.c */ +char *bdecode(char *, char *, struct ben **); +void bencode(char **, size_t *, struct ben *); +char *bstr2str(struct ben *); +int bstrcmp(struct ben *, struct ben *); +struct ben *dlook(struct ben *, struct ben *); +struct ben *dlookstr(struct ben *, char *); +void bfree(struct ben *); + +/* util.c */ +void *emalloc(size_t); +void setbit(uint32_t *, int); +void clrbit(uint32_t *, int); +int tstbit(uint32_t *, int); +uint8_t hex2int(int); +uint8_t *hex2bin(const char *, uint8_t *, size_t); +char *bin2hex(const uint8_t *, char *, size_t); +void sha1sum(uint8_t *, unsigned long, uint8_t *md); diff --git a/sha1.c b/sha1.c @@ -0,0 +1,144 @@ +/* public domain sha1 implementation based on rfc3174 and libtomcrypt */ +#include <stdint.h> +#include <string.h> + +#include "sha1.h" + +static uint32_t rol(uint32_t n, int k) { return (n << k) | (n >> (32-k)); } +#define F0(b,c,d) (d ^ (b & (c ^ d))) +#define F1(b,c,d) (b ^ c ^ d) +#define F2(b,c,d) ((b & c) | (d & (b | c))) +#define F3(b,c,d) (b ^ c ^ d) +#define G0(a,b,c,d,e,i) e += rol(a,5)+F0(b,c,d)+W[i]+0x5A827999; b = rol(b,30) +#define G1(a,b,c,d,e,i) e += rol(a,5)+F1(b,c,d)+W[i]+0x6ED9EBA1; b = rol(b,30) +#define G2(a,b,c,d,e,i) e += rol(a,5)+F2(b,c,d)+W[i]+0x8F1BBCDC; b = rol(b,30) +#define G3(a,b,c,d,e,i) e += rol(a,5)+F3(b,c,d)+W[i]+0xCA62C1D6; b = rol(b,30) + +static void +processblock(struct sha1 *s, const uint8_t *buf) +{ + uint32_t W[80], a, b, c, d, e; + int i; + + for (i = 0; i < 16; i++) { + W[i] = (uint32_t)buf[4*i]<<24; + W[i] |= (uint32_t)buf[4*i+1]<<16; + W[i] |= (uint32_t)buf[4*i+2]<<8; + W[i] |= buf[4*i+3]; + } + for (; i < 80; i++) + W[i] = rol(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1); + a = s->h[0]; + b = s->h[1]; + c = s->h[2]; + d = s->h[3]; + e = s->h[4]; + for (i = 0; i < 20; ) { + G0(a,b,c,d,e,i++); + G0(e,a,b,c,d,i++); + G0(d,e,a,b,c,i++); + G0(c,d,e,a,b,i++); + G0(b,c,d,e,a,i++); + } + while (i < 40) { + G1(a,b,c,d,e,i++); + G1(e,a,b,c,d,i++); + G1(d,e,a,b,c,i++); + G1(c,d,e,a,b,i++); + G1(b,c,d,e,a,i++); + } + while (i < 60) { + G2(a,b,c,d,e,i++); + G2(e,a,b,c,d,i++); + G2(d,e,a,b,c,i++); + G2(c,d,e,a,b,i++); + G2(b,c,d,e,a,i++); + } + while (i < 80) { + G3(a,b,c,d,e,i++); + G3(e,a,b,c,d,i++); + G3(d,e,a,b,c,i++); + G3(c,d,e,a,b,i++); + G3(b,c,d,e,a,i++); + } + s->h[0] += a; + s->h[1] += b; + s->h[2] += c; + s->h[3] += d; + s->h[4] += e; +} + +static void +pad(struct sha1 *s) +{ + unsigned r = s->len % 64; + + s->buf[r++] = 0x80; + if (r > 56) { + memset(s->buf + r, 0, 64 - r); + r = 0; + processblock(s, s->buf); + } + memset(s->buf + r, 0, 56 - r); + s->len *= 8; + s->buf[56] = s->len >> 56; + s->buf[57] = s->len >> 48; + s->buf[58] = s->len >> 40; + s->buf[59] = s->len >> 32; + s->buf[60] = s->len >> 24; + s->buf[61] = s->len >> 16; + s->buf[62] = s->len >> 8; + s->buf[63] = s->len; + processblock(s, s->buf); +} + +void +sha1_init(void *ctx) +{ + struct sha1 *s = ctx; + + s->len = 0; + s->h[0] = 0x67452301; + s->h[1] = 0xEFCDAB89; + s->h[2] = 0x98BADCFE; + s->h[3] = 0x10325476; + s->h[4] = 0xC3D2E1F0; +} + +void +sha1_sum(void *ctx, uint8_t md[SHA1_DIGEST_LENGTH]) +{ + struct sha1 *s = ctx; + int i; + + pad(s); + for (i = 0; i < 5; i++) { + md[4*i] = s->h[i] >> 24; + md[4*i+1] = s->h[i] >> 16; + md[4*i+2] = s->h[i] >> 8; + md[4*i+3] = s->h[i]; + } +} + +void +sha1_update(void *ctx, const void *m, unsigned long len) +{ + struct sha1 *s = ctx; + const uint8_t *p = m; + unsigned r = s->len % 64; + + s->len += len; + if (r) { + if (len < 64 - r) { + memcpy(s->buf + r, p, len); + return; + } + memcpy(s->buf + r, p, 64 - r); + len -= 64 - r; + p += 64 - r; + processblock(s, s->buf); + } + for (; len >= 64; len -= 64, p += 64) + processblock(s, p); + memcpy(s->buf, p, len); +} diff --git a/sha1.h b/sha1.h @@ -0,0 +1,18 @@ +/* public domain sha1 implementation based on rfc3174 and libtomcrypt */ + +#define SHA1_DIGEST_LENGTH 20 + +struct sha1 { + uint64_t len; /* processed message length */ + uint32_t h[5]; /* hash state */ + uint8_t buf[64]; /* message block buffer */ +}; + +/* reset state */ +void sha1_init(void *ctx); +/* process message */ +void sha1_update(void *ctx, const void *m, unsigned long len); +/* get message digest */ +/* state is ruined after sum, keep a copy if multiple sum is needed */ +/* part of the message might be left in s, zero it if secrecy is needed */ +void sha1_sum(void *ctx, uint8_t md[SHA1_DIGEST_LENGTH]); diff --git a/util.c b/util.c @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2015 Dimitris Papastamos <sin@2f30.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <ctype.h> +#include <err.h> +#include <stdint.h> +#include <stdlib.h> + +#include "sbtd.h" +#include "sha1.h" + +void * +emalloc(size_t size) +{ + void *p; + + p = malloc(size); + if (!p) + err(1, "malloc"); + return p; +} + +void +setbit(uint32_t *b, int n) +{ + b[n / 32] |= (1 << n); +} + +void +clrbit(uint32_t *b, int n) +{ + b[n / 32] &= ~(1 << n); +} + +int +tstbit(uint32_t *b, int n) +{ + return (b[n / 32] & (1 << n % 32)) != 0; +} + +uint8_t +hex2int(int c) +{ + c = tolower(c); + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + errx(1, "%c is not hex", c); +} + +uint8_t * +hex2bin(const char *h, uint8_t *b, size_t n) +{ + size_t i; + + for (i = 0; i < n; i++) + b[i] = hex2int(h[i * 2]) << 4 | hex2int(h[i * 2 + 1]); + return b; +} + + +char * +bin2hex(const uint8_t *b, char *h, size_t n) +{ + const char *c = "0123456789abcdef"; + size_t i; + + for (i = 0; i < n; i++) { + h[i * 2] = c[(b[i] >> 4) & 0xf]; + h[i * 2 + 1] = c[b[i] &0xf]; + } + h[i * 2] = '\0'; + return h; +} + +void +sha1sum(uint8_t *b, unsigned long n, uint8_t *md) +{ + struct sha1 ctx; + + sha1_init(&ctx); + sha1_update(&ctx, b, n); + sha1_sum(&ctx, md); +}