Removing unused PuTTY source files

(cherry picked from commit 2ab20bb81be2ea1ebf339724a140a2efdf341783)

Source commit: e7a2e0d74967048861eaf0c19c53f6e4193bc1ef

source/putty/crypto/xdmauth.c

@@ -1,53 +0,0 @@
-/*
- * Convenience functions to encrypt and decrypt the cookies used in
- * XDM-AUTHORIZATION-1. 
- */
-
-#include "ssh.h"
-
-static ssh_cipher *des_xdmauth_cipher(const void *vkeydata)
-{
-    /*
-     * XDM-AUTHORIZATION-1 uses single-DES, but packs the key into 7
-     * bytes, so here we have to repack it manually into the canonical
-     * form where it occupies 8 bytes each with the low bit unused.
-     */
-    const unsigned char *keydata = (const unsigned char *)vkeydata;
-    unsigned char key[8];
-    int i, nbits, j;
-    unsigned int bits;
-
-    bits = 0;
-    nbits = 0;
-    j = 0;
-    for (i = 0; i < 8; i++) {
-        if (nbits < 7) {
-            bits = (bits << 8) | keydata[j];
-            nbits += 8;
-            j++;
-        }
-        key[i] = (bits >> (nbits - 7)) << 1;
-        bits &= ~(0x7F << (nbits - 7));
-        nbits -= 7;
-    }
-
-    ssh_cipher *c = ssh_cipher_new(&ssh_des);
-    ssh_cipher_setkey(c, key);
-    smemclr(key, sizeof(key));
-    ssh_cipher_setiv(c, key);
-    return c;
-}
-
-void des_encrypt_xdmauth(const void *keydata, void *blk, int len)
-{
-    ssh_cipher *c = des_xdmauth_cipher(keydata);
-    ssh_cipher_encrypt(c, blk, len);
-    ssh_cipher_free(c);
-}
-
-void des_decrypt_xdmauth(const void *keydata, void *blk, int len)
-{
-    ssh_cipher *c = des_xdmauth_cipher(keydata);
-    ssh_cipher_decrypt(c, blk, len);
-    ssh_cipher_free(c);
-}

source/putty/utils/encode_utf8.c

@@ -1,29 +0,0 @@
-/*
- * Encode a single code point as UTF-8.
- */
-
-#include "defs.h"
-#include "misc.h"
-
-size_t encode_utf8(void *output, unsigned long ch)
-{
-    unsigned char *start = (unsigned char *)output, *p = start;
-
-    if (ch < 0x80) {
-        *p++ = ch;
-    } else if (ch < 0x800) {
-        *p++ = 0xC0 | (ch >> 6);
-        *p++ = 0x80 | (ch & 0x3F);
-    } else if (ch < 0x10000) {
-        *p++ = 0xE0 | (ch >> 12);
-        *p++ = 0x80 | ((ch >> 6) & 0x3F);
-        *p++ = 0x80 | (ch & 0x3F);
-    } else {
-        assert(ch <= 0x10FFFF);
-        *p++ = 0xF0 | (ch >> 18);
-        *p++ = 0x80 | ((ch >> 12) & 0x3F);
-        *p++ = 0x80 | ((ch >> 6) & 0x3F);
-        *p++ = 0x80 | (ch & 0x3F);
-    }
-    return p - start;
-}

source/putty/utils/read_file_into.c

@@ -1,19 +0,0 @@
-/*
- * Read an entire file into a BinarySink.
- */
-
-#include <stdio.h>
-
-#include "defs.h"
-#include "misc.h"
-
-bool read_file_into(BinarySink *bs, FILE *fp)
-{
-    char buf[4096];
-    while (1) {
-        size_t retd = fread(buf, 1, sizeof(buf), fp);
-        if (retd == 0)
-            return !ferror(fp);
-        put_data(bs, buf, retd);
-    }
-}

source/putty/windows/utils/minefield.c

@@ -1,227 +0,0 @@
-/*
- * 'Minefield' - a crude Windows memory debugger, similar in concept
- * to the old Unix 'Electric Fence'. The main difference is that
- * Electric Fence can be imposed on a program from outside, via
- * LD_PRELOAD, whereas this has to be included in the program at
- * compile time with its own cooperation.
- *
- * This module provides the Minefield allocator. Actually enabling it
- * is done by a #define in force when the main utils/memory.c is
- * compiled.
- */
-
-#include "putty.h"
-
-#define PAGESIZE 4096
-
-/*
- * Design:
- *
- * We start by reserving as much virtual address space as Windows
- * will sensibly (or not sensibly) let us have. We flag it all as
- * invalid memory.
- *
- * Any allocation attempt is satisfied by committing one or more
- * pages, with an uncommitted page on either side. The returned
- * memory region is jammed up against the _end_ of the pages.
- *
- * Freeing anything causes instantaneous decommitment of the pages
- * involved, so stale pointers are caught as soon as possible.
- */
-
-static int minefield_initialised = 0;
-static void *minefield_region = NULL;
-static long minefield_size = 0;
-static long minefield_npages = 0;
-static long minefield_curpos = 0;
-static unsigned short *minefield_admin = NULL;
-static void *minefield_pages = NULL;
-
-static void minefield_admin_hide(int hide)
-{
-    int access = hide ? PAGE_NOACCESS : PAGE_READWRITE;
-    VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL);
-}
-
-static void minefield_init(void)
-{
-    int size;
-    int admin_size;
-    int i;
-
-    for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) {
-        minefield_region = VirtualAlloc(NULL, size,
-                                        MEM_RESERVE, PAGE_NOACCESS);
-        if (minefield_region)
-            break;
-    }
-    minefield_size = size;
-
-    /*
-     * Firstly, allocate a section of that to be the admin block.
-     * We'll need a two-byte field for each page.
-     */
-    minefield_admin = minefield_region;
-    minefield_npages = minefield_size / PAGESIZE;
-    admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1);
-    minefield_npages = (minefield_size - admin_size) / PAGESIZE;
-    minefield_pages = (char *) minefield_region + admin_size;
-
-    /*
-     * Commit the admin region.
-     */
-    VirtualAlloc(minefield_admin, minefield_npages * 2,
-                 MEM_COMMIT, PAGE_READWRITE);
-
-    /*
-     * Mark all pages as unused (0xFFFF).
-     */
-    for (i = 0; i < minefield_npages; i++)
-        minefield_admin[i] = 0xFFFF;
-
-    /*
-     * Hide the admin region.
-     */
-    minefield_admin_hide(1);
-
-    minefield_initialised = 1;
-}
-
-static void minefield_bomb(void)
-{
-    div(1, *(int *) minefield_pages);
-}
-
-static void *minefield_alloc(int size)
-{
-    int npages;
-    int pos, lim, region_end, region_start;
-    int start;
-    int i;
-
-    npages = (size + PAGESIZE - 1) / PAGESIZE;
-
-    minefield_admin_hide(0);
-
-    /*
-     * Search from current position until we find a contiguous
-     * bunch of npages+2 unused pages.
-     */
-    pos = minefield_curpos;
-    lim = minefield_npages;
-    while (1) {
-        /* Skip over used pages. */
-        while (pos < lim && minefield_admin[pos] != 0xFFFF)
-            pos++;
-        /* Count unused pages. */
-        start = pos;
-        while (pos < lim && pos - start < npages + 2 &&
-               minefield_admin[pos] == 0xFFFF)
-            pos++;
-        if (pos - start == npages + 2)
-            break;
-        /* If we've reached the limit, reset the limit or stop. */
-        if (pos >= lim) {
-            if (lim == minefield_npages) {
-                /* go round and start again at zero */
-                lim = minefield_curpos;
-                pos = 0;
-            } else {
-                minefield_admin_hide(1);
-                return NULL;
-            }
-        }
-    }
-
-    minefield_curpos = pos - 1;
-
-    /*
-     * We have npages+2 unused pages starting at start. We leave
-     * the first and last of these alone and use the rest.
-     */
-    region_end = (start + npages + 1) * PAGESIZE;
-    region_start = region_end - size;
-    /* FIXME: could align here if we wanted */
-
-    /*
-     * Update the admin region.
-     */
-    for (i = start + 2; i < start + npages + 1; i++)
-        minefield_admin[i] = 0xFFFE;   /* used but no region starts here */
-    minefield_admin[start + 1] = region_start % PAGESIZE;
-
-    minefield_admin_hide(1);
-
-    VirtualAlloc((char *) minefield_pages + region_start, size,
-                 MEM_COMMIT, PAGE_READWRITE);
-    return (char *) minefield_pages + region_start;
-}
-
-static void minefield_free(void *ptr)
-{
-    int region_start, i, j;
-
-    minefield_admin_hide(0);
-
-    region_start = (char *) ptr - (char *) minefield_pages;
-    i = region_start / PAGESIZE;
-    if (i < 0 || i >= minefield_npages ||
-        minefield_admin[i] != region_start % PAGESIZE)
-        minefield_bomb();
-    for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) {
-        minefield_admin[j] = 0xFFFF;
-    }
-
-    VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT);
-
-    minefield_admin_hide(1);
-}
-
-static int minefield_get_size(void *ptr)
-{
-    int region_start, i, j;
-
-    minefield_admin_hide(0);
-
-    region_start = (char *) ptr - (char *) minefield_pages;
-    i = region_start / PAGESIZE;
-    if (i < 0 || i >= minefield_npages ||
-        minefield_admin[i] != region_start % PAGESIZE)
-        minefield_bomb();
-    for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++);
-
-    minefield_admin_hide(1);
-
-    return j * PAGESIZE - region_start;
-}
-
-void *minefield_c_malloc(size_t size)
-{
-    if (!minefield_initialised)
-        minefield_init();
-    return minefield_alloc(size);
-}
-
-void minefield_c_free(void *p)
-{
-    if (!minefield_initialised)
-        minefield_init();
-    minefield_free(p);
-}
-
-/*
- * realloc _always_ moves the chunk, for rapid detection of code
- * that assumes it won't.
- */
-void *minefield_c_realloc(void *p, size_t size)
-{
-    size_t oldsize;
-    void *q;
-    if (!minefield_initialised)
-        minefield_init();
-    q = minefield_alloc(size);
-    oldsize = minefield_get_size(p);
-    memcpy(q, p, (oldsize < size ? oldsize : size));
-    minefield_free(p);
-    return q;
-}