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Diffstat (limited to '')
| -rw-r--r-- | sftp-common.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/sftp-common.c b/sftp-common.c new file mode 100644 index 0000000..5d72498 --- /dev/null +++ b/sftp-common.c @@ -0,0 +1,265 @@ +/* $OpenBSD: sftp-common.c,v 1.34 2023/03/31 04:00:37 djm Exp $ */ +/* + * Copyright (c) 2001 Markus Friedl. All rights reserved. + * Copyright (c) 2001 Damien Miller. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#include "includes.h" + +#include <sys/types.h> +#include <sys/stat.h> + +#include <grp.h> +#include <pwd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <stdarg.h> +#include <unistd.h> +#ifdef HAVE_UTIL_H +#include <util.h> +#endif + +#include "xmalloc.h" +#include "ssherr.h" +#include "sshbuf.h" +#include "log.h" +#include "misc.h" + +#include "sftp.h" +#include "sftp-common.h" + +/* Clear contents of attributes structure */ +void +attrib_clear(Attrib *a) +{ + a->flags = 0; + a->size = 0; + a->uid = 0; + a->gid = 0; + a->perm = 0; + a->atime = 0; + a->mtime = 0; +} + +/* Convert from struct stat to filexfer attribs */ +void +stat_to_attrib(const struct stat *st, Attrib *a) +{ + attrib_clear(a); + a->flags = 0; + a->flags |= SSH2_FILEXFER_ATTR_SIZE; + a->size = st->st_size; + a->flags |= SSH2_FILEXFER_ATTR_UIDGID; + a->uid = st->st_uid; + a->gid = st->st_gid; + a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; + a->perm = st->st_mode; + a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; + a->atime = st->st_atime; + a->mtime = st->st_mtime; +} + +/* Convert from filexfer attribs to struct stat */ +void +attrib_to_stat(const Attrib *a, struct stat *st) +{ + memset(st, 0, sizeof(*st)); + + if (a->flags & SSH2_FILEXFER_ATTR_SIZE) + st->st_size = a->size; + if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { + st->st_uid = a->uid; + st->st_gid = a->gid; + } + if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) + st->st_mode = a->perm; + if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { + st->st_atime = a->atime; + st->st_mtime = a->mtime; + } +} + +/* Decode attributes in buffer */ +int +decode_attrib(struct sshbuf *b, Attrib *a) +{ + int r; + + attrib_clear(a); + if ((r = sshbuf_get_u32(b, &a->flags)) != 0) + return r; + if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { + if ((r = sshbuf_get_u64(b, &a->size)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { + if ((r = sshbuf_get_u32(b, &a->uid)) != 0 || + (r = sshbuf_get_u32(b, &a->gid)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { + if ((r = sshbuf_get_u32(b, &a->perm)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { + if ((r = sshbuf_get_u32(b, &a->atime)) != 0 || + (r = sshbuf_get_u32(b, &a->mtime)) != 0) + return r; + } + /* vendor-specific extensions */ + if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) { + char *type; + u_char *data; + size_t dlen; + u_int i, count; + + if ((r = sshbuf_get_u32(b, &count)) != 0) + return r; + if (count > 0x100000) + return SSH_ERR_INVALID_FORMAT; + for (i = 0; i < count; i++) { + if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 || + (r = sshbuf_get_string(b, &data, &dlen)) != 0) + return r; + debug3("Got file attribute \"%.100s\" len %zu", + type, dlen); + free(type); + free(data); + } + } + return 0; +} + +/* Encode attributes to buffer */ +int +encode_attrib(struct sshbuf *b, const Attrib *a) +{ + int r; + + if ((r = sshbuf_put_u32(b, a->flags)) != 0) + return r; + if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { + if ((r = sshbuf_put_u64(b, a->size)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { + if ((r = sshbuf_put_u32(b, a->uid)) != 0 || + (r = sshbuf_put_u32(b, a->gid)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { + if ((r = sshbuf_put_u32(b, a->perm)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { + if ((r = sshbuf_put_u32(b, a->atime)) != 0 || + (r = sshbuf_put_u32(b, a->mtime)) != 0) + return r; + } + return 0; +} + +/* Convert from SSH2_FX_ status to text error message */ +const char * +fx2txt(int status) +{ + switch (status) { + case SSH2_FX_OK: + return("No error"); + case SSH2_FX_EOF: + return("End of file"); + case SSH2_FX_NO_SUCH_FILE: + return("No such file or directory"); + case SSH2_FX_PERMISSION_DENIED: + return("Permission denied"); + case SSH2_FX_FAILURE: + return("Failure"); + case SSH2_FX_BAD_MESSAGE: + return("Bad message"); + case SSH2_FX_NO_CONNECTION: + return("No connection"); + case SSH2_FX_CONNECTION_LOST: + return("Connection lost"); + case SSH2_FX_OP_UNSUPPORTED: + return("Operation unsupported"); + default: + return("Unknown status"); + } + /* NOTREACHED */ +} + +/* + * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh + */ +char * +ls_file(const char *name, const struct stat *st, int remote, int si_units, + const char *user, const char *group) +{ + int ulen, glen, sz = 0; + struct tm *ltime = localtime(&st->st_mtime); + char buf[1024], lc[8], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; + char sbuf[FMT_SCALED_STRSIZE]; + time_t now; + + strmode(st->st_mode, mode); + if (remote) { + if (user == NULL) { + snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); + user = ubuf; + } + if (group == NULL) { + snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); + group = gbuf; + } + strlcpy(lc, "?", sizeof(lc)); + } else { + user = user_from_uid(st->st_uid, 0); + group = group_from_gid(st->st_gid, 0); + snprintf(lc, sizeof(lc), "%u", (u_int)st->st_nlink); + } + if (ltime != NULL) { + now = time(NULL); + if (now - (365*24*60*60)/2 < st->st_mtime && + now >= st->st_mtime) + sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); + else + sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); + } + if (sz == 0) + tbuf[0] = '\0'; + ulen = MAXIMUM(strlen(user), 8); + glen = MAXIMUM(strlen(group), 8); + if (si_units) { + fmt_scaled((long long)st->st_size, sbuf); + snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8s %s %s", + mode, lc, ulen, user, glen, group, + sbuf, tbuf, name); + } else { + snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8llu %s %s", + mode, lc, ulen, user, glen, group, + (unsigned long long)st->st_size, tbuf, name); + } + return xstrdup(buf); +} |