diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:40:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:40:04 +0000 |
commit | 25505898530a333011f4fd5cbc841ad6b26c089c (patch) | |
tree | 333a33fdd60930bcccc3f177ed9467d535e9bac6 /sshbuf-io.c | |
parent | Initial commit. (diff) | |
download | openssh-upstream.tar.xz openssh-upstream.zip |
Adding upstream version 1:9.2p1.upstream/1%9.2p1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sshbuf-io.c')
-rw-r--r-- | sshbuf-io.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/sshbuf-io.c b/sshbuf-io.c new file mode 100644 index 0000000..13ef40e --- /dev/null +++ b/sshbuf-io.c @@ -0,0 +1,117 @@ +/* $OpenBSD: sshbuf-io.c,v 1.2 2020/01/25 23:28:06 djm Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * 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 "includes.h" + +#include <sys/types.h> +#include <sys/stat.h> + +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> + +#include "ssherr.h" +#include "sshbuf.h" +#include "atomicio.h" + +/* Load a file from a fd into a buffer */ +int +sshbuf_load_fd(int fd, struct sshbuf **blobp) +{ + u_char buf[4096]; + size_t len; + struct stat st; + int r; + struct sshbuf *blob; + + *blobp = NULL; + + if (fstat(fd, &st) == -1) + return SSH_ERR_SYSTEM_ERROR; + if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 && + st.st_size > SSHBUF_SIZE_MAX) + return SSH_ERR_INVALID_FORMAT; + if ((blob = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + for (;;) { + if ((len = atomicio(read, fd, buf, sizeof(buf))) == 0) { + if (errno == EPIPE) + break; + r = SSH_ERR_SYSTEM_ERROR; + goto out; + } + if ((r = sshbuf_put(blob, buf, len)) != 0) + goto out; + if (sshbuf_len(blob) > SSHBUF_SIZE_MAX) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 && + st.st_size != (off_t)sshbuf_len(blob)) { + r = SSH_ERR_FILE_CHANGED; + goto out; + } + /* success */ + *blobp = blob; + blob = NULL; /* transferred */ + r = 0; + out: + explicit_bzero(buf, sizeof(buf)); + sshbuf_free(blob); + return r; +} + +int +sshbuf_load_file(const char *path, struct sshbuf **bufp) +{ + int r, fd, oerrno; + + *bufp = NULL; + if ((fd = open(path, O_RDONLY)) == -1) + return SSH_ERR_SYSTEM_ERROR; + if ((r = sshbuf_load_fd(fd, bufp)) != 0) + goto out; + /* success */ + r = 0; + out: + oerrno = errno; + close(fd); + if (r != 0) + errno = oerrno; + return r; +} + +int +sshbuf_write_file(const char *path, struct sshbuf *buf) +{ + int fd, oerrno; + + if ((fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644)) == -1) + return SSH_ERR_SYSTEM_ERROR; + if (atomicio(vwrite, fd, sshbuf_mutable_ptr(buf), + sshbuf_len(buf)) != sshbuf_len(buf) || close(fd) != 0) { + oerrno = errno; + close(fd); + unlink(path); + errno = oerrno; + return SSH_ERR_SYSTEM_ERROR; + } + return 0; +} + |