/* $NetBSD: sftp-common.c,v 1.11.2.1 2023/12/25 12:31:06 martin Exp $ */ /* $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" __RCSID("$NetBSD: sftp-common.c,v 1.11.2.1 2023/12/25 12:31:06 martin Exp $"); #include /* MAX */ #include #include #include #include #include #include #include #include #include #include #include #include "xmalloc.h" #include "ssherr.h" #include "sshbuf.h" #include "log.h" #include "misc.h" #include "sftp.h" #include "sftp-common.h" #include "fmt_scaled.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); }