#include <string.h>
#include <assert.h>
+#include "misc.h"
#include "int64.h"
#include "sftp.h"
-#define smalloc malloc
-#define srealloc realloc
-#define sfree free
-
#define GET_32BIT(cp) \
(((unsigned long)(unsigned char)(cp)[0] << 24) | \
((unsigned long)(unsigned char)(cp)[1] << 16) | \
int type;
};
+static const char *fxp_error_message;
+static int fxp_errtype;
+
/* ----------------------------------------------------------------------
* SFTP packet construction functions.
*/
-static void sftp_pkt_ensure(struct sftp_packet *pkt, int length) {
+static void sftp_pkt_ensure(struct sftp_packet *pkt, int length)
+{
if (pkt->maxlen < length) {
- pkt->maxlen = length + 256;
+ pkt->maxlen = length + 256;
pkt->data = srealloc(pkt->data, pkt->maxlen);
}
}
-static void sftp_pkt_adddata(struct sftp_packet *pkt, void *data, int len) {
+static void sftp_pkt_adddata(struct sftp_packet *pkt, void *data, int len)
+{
pkt->length += len;
sftp_pkt_ensure(pkt, pkt->length);
- memcpy(pkt->data+pkt->length-len, data, len);
+ memcpy(pkt->data + pkt->length - len, data, len);
}
-static void sftp_pkt_addbyte(struct sftp_packet *pkt, unsigned char byte) {
+static void sftp_pkt_addbyte(struct sftp_packet *pkt, unsigned char byte)
+{
sftp_pkt_adddata(pkt, &byte, 1);
}
-static struct sftp_packet *sftp_pkt_init(int pkt_type) {
+static struct sftp_packet *sftp_pkt_init(int pkt_type)
+{
struct sftp_packet *pkt;
pkt = smalloc(sizeof(struct sftp_packet));
pkt->data = NULL;
pkt->savedpos = -1;
pkt->length = 0;
pkt->maxlen = 0;
- sftp_pkt_addbyte(pkt, (unsigned char)pkt_type);
+ sftp_pkt_addbyte(pkt, (unsigned char) pkt_type);
return pkt;
}
-static void sftp_pkt_addbool(struct sftp_packet *pkt, unsigned char value) {
+static void sftp_pkt_addbool(struct sftp_packet *pkt, unsigned char value)
+{
sftp_pkt_adddata(pkt, &value, 1);
}
-static void sftp_pkt_adduint32(struct sftp_packet *pkt, unsigned long value) {
+static void sftp_pkt_adduint32(struct sftp_packet *pkt,
+ unsigned long value)
+{
unsigned char x[4];
PUT_32BIT(x, value);
sftp_pkt_adddata(pkt, x, 4);
}
-static void sftp_pkt_adduint64(struct sftp_packet *pkt, uint64 value) {
+static void sftp_pkt_adduint64(struct sftp_packet *pkt, uint64 value)
+{
unsigned char x[8];
PUT_32BIT(x, value.hi);
- PUT_32BIT(x+4, value.lo);
+ PUT_32BIT(x + 4, value.lo);
sftp_pkt_adddata(pkt, x, 8);
}
-static void sftp_pkt_addstring_start(struct sftp_packet *pkt) {
+static void sftp_pkt_addstring_start(struct sftp_packet *pkt)
+{
sftp_pkt_adduint32(pkt, 0);
pkt->savedpos = pkt->length;
}
-static void sftp_pkt_addstring_str(struct sftp_packet *pkt, char *data) {
+static void sftp_pkt_addstring_str(struct sftp_packet *pkt, char *data)
+{
sftp_pkt_adddata(pkt, data, strlen(data));
- PUT_32BIT(pkt->data + pkt->savedpos - 4,
- pkt->length - pkt->savedpos);
+ PUT_32BIT(pkt->data + pkt->savedpos - 4, pkt->length - pkt->savedpos);
}
static void sftp_pkt_addstring_data(struct sftp_packet *pkt,
- char *data, int len) {
+ char *data, int len)
+{
sftp_pkt_adddata(pkt, data, len);
- PUT_32BIT(pkt->data + pkt->savedpos - 4,
- pkt->length - pkt->savedpos);
+ PUT_32BIT(pkt->data + pkt->savedpos - 4, pkt->length - pkt->savedpos);
}
-static void sftp_pkt_addstring(struct sftp_packet *pkt, char *data) {
+static void sftp_pkt_addstring(struct sftp_packet *pkt, char *data)
+{
sftp_pkt_addstring_start(pkt);
sftp_pkt_addstring_str(pkt, data);
}
+static void sftp_pkt_addattrs(struct sftp_packet *pkt, struct fxp_attrs attrs)
+{
+ sftp_pkt_adduint32(pkt, attrs.flags);
+ if (attrs.flags & SSH_FILEXFER_ATTR_SIZE) {
+ sftp_pkt_adduint32(pkt, attrs.size.hi);
+ sftp_pkt_adduint32(pkt, attrs.size.lo);
+ }
+ if (attrs.flags & SSH_FILEXFER_ATTR_UIDGID) {
+ sftp_pkt_adduint32(pkt, attrs.uid);
+ sftp_pkt_adduint32(pkt, attrs.gid);
+ }
+ if (attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) {
+ sftp_pkt_adduint32(pkt, attrs.permissions);
+ }
+ if (attrs.flags & SSH_FILEXFER_ATTR_ACMODTIME) {
+ sftp_pkt_adduint32(pkt, attrs.atime);
+ sftp_pkt_adduint32(pkt, attrs.mtime);
+ }
+ if (attrs.flags & SSH_FILEXFER_ATTR_EXTENDED) {
+ /*
+ * We currently don't support sending any extended
+ * attributes.
+ */
+ }
+}
/* ----------------------------------------------------------------------
* SFTP packet decode functions.
*/
-static unsigned char sftp_pkt_getbyte(struct sftp_packet *pkt) {
- unsigned long value;
+static unsigned char sftp_pkt_getbyte(struct sftp_packet *pkt)
+{
+ unsigned char value;
if (pkt->length - pkt->savedpos < 1)
- return 0; /* arrgh, no way to decline (FIXME?) */
+ return 0; /* arrgh, no way to decline (FIXME?) */
value = (unsigned char) pkt->data[pkt->savedpos];
pkt->savedpos++;
return value;
}
-static unsigned long sftp_pkt_getuint32(struct sftp_packet *pkt) {
+static unsigned long sftp_pkt_getuint32(struct sftp_packet *pkt)
+{
unsigned long value;
if (pkt->length - pkt->savedpos < 4)
- return 0; /* arrgh, no way to decline (FIXME?) */
- value = GET_32BIT(pkt->data+pkt->savedpos);
+ return 0; /* arrgh, no way to decline (FIXME?) */
+ value = GET_32BIT(pkt->data + pkt->savedpos);
pkt->savedpos += 4;
return value;
}
static void sftp_pkt_getstring(struct sftp_packet *pkt,
- char **p, int *length) {
+ char **p, int *length)
+{
*p = NULL;
if (pkt->length - pkt->savedpos < 4)
- return;
- *length = GET_32BIT(pkt->data+pkt->savedpos);
+ return;
+ *length = GET_32BIT(pkt->data + pkt->savedpos);
pkt->savedpos += 4;
if (pkt->length - pkt->savedpos < *length)
- return;
- *p = pkt->data+pkt->savedpos;
+ return;
+ *p = pkt->data + pkt->savedpos;
pkt->savedpos += *length;
}
-static struct fxp_attrs sftp_pkt_getattrs(struct sftp_packet *pkt) {
+static struct fxp_attrs sftp_pkt_getattrs(struct sftp_packet *pkt)
+{
struct fxp_attrs ret;
ret.flags = sftp_pkt_getuint32(pkt);
if (ret.flags & SSH_FILEXFER_ATTR_SIZE) {
}
return ret;
}
-static void sftp_pkt_free(struct sftp_packet *pkt) {
- if (pkt->data) sfree(pkt->data);
+static void sftp_pkt_free(struct sftp_packet *pkt)
+{
+ if (pkt->data)
+ sfree(pkt->data);
sfree(pkt);
}
/* ----------------------------------------------------------------------
* Send and receive packet functions.
*/
-int sftp_send(struct sftp_packet *pkt) {
+int sftp_send(struct sftp_packet *pkt)
+{
int ret;
char x[4];
PUT_32BIT(x, pkt->length);
- ret = (sftp_senddata(x, 4) &&
- sftp_senddata(pkt->data, pkt->length));
+ ret = (sftp_senddata(x, 4) && sftp_senddata(pkt->data, pkt->length));
sftp_pkt_free(pkt);
return ret;
}
-struct sftp_packet *sftp_recv(void) {
+struct sftp_packet *sftp_recv(void)
+{
struct sftp_packet *pkt;
char x[4];
- int p, ret;
if (!sftp_recvdata(x, 4))
return NULL;
* String handling routines.
*/
-static char *mkstr(char *s, int len) {
- char *p = smalloc(len+1);
+static char *mkstr(char *s, int len)
+{
+ char *p = smalloc(len + 1);
memcpy(p, s, len);
p[len] = '\0';
return p;
* SFTP primitives.
*/
-static const char *fxp_error_message;
-static int fxp_errtype;
-
/*
* Deal with (and free) an FXP_STATUS packet. Return 1 if
* SSH_FX_OK, 0 if SSH_FX_EOF, and -1 for anything else (error).
* Also place the status into fxp_errtype.
*/
-static int fxp_got_status(struct sftp_packet *pktin) {
+static int fxp_got_status(struct sftp_packet *pktin)
+{
static const char *const messages[] = {
/* SSH_FX_OK. The only time we will display a _message_ for this
* is if we were expecting something other than FXP_STATUS on
} else {
fxp_errtype = sftp_pkt_getuint32(pktin);
if (fxp_errtype < 0 ||
- fxp_errtype >= sizeof(messages)/sizeof(*messages))
- fxp_error_message = "unknown error code";
+ fxp_errtype >= sizeof(messages) / sizeof(*messages))
+ fxp_error_message = "unknown error code";
else
fxp_error_message = messages[fxp_errtype];
}
return -1;
}
-static void fxp_internal_error(char *msg) {
+static void fxp_internal_error(char *msg)
+{
fxp_error_message = msg;
fxp_errtype = -1;
}
-const char *fxp_error(void) {
+const char *fxp_error(void)
+{
return fxp_error_message;
}
-int fxp_error_type(void) {
+int fxp_error_type(void)
+{
return fxp_errtype;
}
/*
* Perform exchange of init/version packets. Return 0 on failure.
*/
-int fxp_init(void) {
+int fxp_init(void)
+{
struct sftp_packet *pktout, *pktin;
int remotever;
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("could not connect");
+ return 0;
+ }
if (pktin->type != SSH_FXP_VERSION) {
fxp_internal_error("did not receive FXP_VERSION");
return 0;
}
remotever = sftp_pkt_getuint32(pktin);
if (remotever > SFTP_PROTO_VERSION) {
- fxp_internal_error("remote protocol is more advanced than we support");
+ fxp_internal_error
+ ("remote protocol is more advanced than we support");
return 0;
}
/*
/*
* Canonify a pathname.
*/
-char *fxp_realpath(char *path) {
+char *fxp_realpath(char *path)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_addstring_str(pktout, path);
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return NULL;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0x123) {
fxp_internal_error("request ID mismatch\n");
/*
* Open a file.
*/
-struct fxp_handle *fxp_open(char *path, int type) {
+struct fxp_handle *fxp_open(char *path, int type)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_adduint32(pktout, 0); /* (FIXME) empty ATTRS structure */
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return NULL;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0x567) {
fxp_internal_error("request ID mismatch\n");
return NULL;
}
if (pktin->type == SSH_FXP_HANDLE) {
- int count;
char *hstring;
struct fxp_handle *handle;
int len;
/*
* Open a directory.
*/
-struct fxp_handle *fxp_opendir(char *path) {
+struct fxp_handle *fxp_opendir(char *path)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_addstring(pktout, path);
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return NULL;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0x456) {
fxp_internal_error("request ID mismatch\n");
return NULL;
}
if (pktin->type == SSH_FXP_HANDLE) {
- int count;
char *hstring;
struct fxp_handle *handle;
int len;
/*
* Close a file/dir.
*/
-void fxp_close(struct fxp_handle *handle) {
+void fxp_close(struct fxp_handle *handle)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0x789) {
fxp_internal_error("request ID mismatch\n");
sfree(handle);
}
+int fxp_mkdir(char *path)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_MKDIR);
+ sftp_pkt_adduint32(pktout, 0x234); /* request id */
+ sftp_pkt_addstring(pktout, path);
+ sftp_pkt_adduint32(pktout, 0); /* (FIXME) empty ATTRS structure */
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x234) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+ id = fxp_got_status(pktin);
+ if (id != 1) {
+ return 0;
+ }
+ return 1;
+}
+
+int fxp_rmdir(char *path)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_RMDIR);
+ sftp_pkt_adduint32(pktout, 0x345); /* request id */
+ sftp_pkt_addstring(pktout, path);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x345) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+ id = fxp_got_status(pktin);
+ if (id != 1) {
+ return 0;
+ }
+ return 1;
+}
+
+int fxp_remove(char *fname)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_REMOVE);
+ sftp_pkt_adduint32(pktout, 0x678); /* request id */
+ sftp_pkt_addstring(pktout, fname);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x678) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+ id = fxp_got_status(pktin);
+ if (id != 1) {
+ return 0;
+ }
+ return 1;
+}
+
+int fxp_rename(char *srcfname, char *dstfname)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_RENAME);
+ sftp_pkt_adduint32(pktout, 0x678); /* request id */
+ sftp_pkt_addstring(pktout, srcfname);
+ sftp_pkt_addstring(pktout, dstfname);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x678) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+ id = fxp_got_status(pktin);
+ if (id != 1) {
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Retrieve the attributes of a file. We have fxp_stat which works
+ * on filenames, and fxp_fstat which works on open file handles.
+ */
+int fxp_stat(char *fname, struct fxp_attrs *attrs)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_STAT);
+ sftp_pkt_adduint32(pktout, 0x678); /* request id */
+ sftp_pkt_addstring(pktout, fname);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x678) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+
+ if (pktin->type == SSH_FXP_ATTRS) {
+ *attrs = sftp_pkt_getattrs(pktin);
+ return 1;
+ } else {
+ fxp_got_status(pktin);
+ return 0;
+ }
+}
+
+int fxp_fstat(struct fxp_handle *handle, struct fxp_attrs *attrs)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_FSTAT);
+ sftp_pkt_adduint32(pktout, 0x678); /* request id */
+ sftp_pkt_addstring_start(pktout);
+ sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x678) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+
+ if (pktin->type == SSH_FXP_ATTRS) {
+ *attrs = sftp_pkt_getattrs(pktin);
+ return 1;
+ } else {
+ fxp_got_status(pktin);
+ return 0;
+ }
+}
+
+/*
+ * Set the attributes of a file.
+ */
+int fxp_setstat(char *fname, struct fxp_attrs attrs)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_SETSTAT);
+ sftp_pkt_adduint32(pktout, 0x678); /* request id */
+ sftp_pkt_addstring(pktout, fname);
+ sftp_pkt_addattrs(pktout, attrs);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x678) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+ id = fxp_got_status(pktin);
+ if (id != 1) {
+ return 0;
+ }
+ return 1;
+}
+int fxp_fsetstat(struct fxp_handle *handle, struct fxp_attrs attrs)
+{
+ struct sftp_packet *pktin, *pktout;
+ int id;
+
+ pktout = sftp_pkt_init(SSH_FXP_FSETSTAT);
+ sftp_pkt_adduint32(pktout, 0x678); /* request id */
+ sftp_pkt_addstring_start(pktout);
+ sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
+ sftp_pkt_addattrs(pktout, attrs);
+ sftp_send(pktout);
+ pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
+ id = sftp_pkt_getuint32(pktin);
+ if (id != 0x678) {
+ fxp_internal_error("request ID mismatch\n");
+ return 0;
+ }
+ id = fxp_got_status(pktin);
+ if (id != 1) {
+ return 0;
+ }
+ return 1;
+}
+
/*
* Read from a file. Returns the number of bytes read, or -1 on an
* error, or possibly 0 if EOF. (I'm not entirely sure whether it
* will return 0 on EOF, or return -1 and store SSH_FX_EOF in the
* error indicator. It might even depend on the SFTP server.)
*/
-int fxp_read(struct fxp_handle *handle, char *buffer, uint64 offset, int len) {
+int fxp_read(struct fxp_handle *handle, char *buffer, uint64 offset,
+ int len)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_adduint32(pktout, len);
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return -1;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0xBCD) {
fxp_internal_error("request ID mismatch");
/*
* Read from a directory.
*/
-struct fxp_names *fxp_readdir(struct fxp_handle *handle) {
+struct fxp_names *fxp_readdir(struct fxp_handle *handle)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return NULL;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0xABC) {
fxp_internal_error("request ID mismatch\n");
/*
* Write to a file. Returns 0 on error, 1 on OK.
*/
-int fxp_write(struct fxp_handle *handle, char *buffer, uint64 offset, int len) {
+int fxp_write(struct fxp_handle *handle, char *buffer, uint64 offset,
+ int len)
+{
struct sftp_packet *pktin, *pktout;
int id;
sftp_pkt_addstring_data(pktout, buffer, len);
sftp_send(pktout);
pktin = sftp_recv();
+ if (!pktin) {
+ fxp_internal_error("did not receive a valid SFTP packet\n");
+ return 0;
+ }
id = sftp_pkt_getuint32(pktin);
if (id != 0xDCB) {
fxp_internal_error("request ID mismatch\n");
- return NULL;
+ return 0;
}
fxp_got_status(pktin);
return fxp_errtype == SSH_FX_OK;
/*
* Free up an fxp_names structure.
*/
-void fxp_free_names(struct fxp_names *names) {
+void fxp_free_names(struct fxp_names *names)
+{
int i;
for (i = 0; i < names->nnames; i++) {
projects / u / mdw / putty / blobdiff