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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-16 16:06:07 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-16 16:06:07 -0600
commitbe0ca741fd12897337408d1d7a7d8f5f18e1fac9 (patch)
treeb9fa3458193a17180d8773a0204ee05ae206cd99 /libtdenetwork/libgpgme-copy/assuan/assuan-buffer.c
parentbbb7afdb6da2969535e7f05715e2cb95cfdc917c (diff)
downloadtdepim-be0ca741fd12897337408d1d7a7d8f5f18e1fac9.tar.gz
tdepim-be0ca741fd12897337408d1d7a7d8f5f18e1fac9.zip
Finish rename from prior commit
Diffstat (limited to 'libtdenetwork/libgpgme-copy/assuan/assuan-buffer.c')
-rw-r--r--libtdenetwork/libgpgme-copy/assuan/assuan-buffer.c550
1 files changed, 550 insertions, 0 deletions
diff --git a/libtdenetwork/libgpgme-copy/assuan/assuan-buffer.c b/libtdenetwork/libgpgme-copy/assuan/assuan-buffer.c
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index 000000000..7a1879877
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+++ b/libtdenetwork/libgpgme-copy/assuan/assuan-buffer.c
@@ -0,0 +1,550 @@
+/* assuan-buffer.c - read and send data
+ * Copyright (C) 2001, 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
+ *
+ * This file is part of Assuan.
+ *
+ * Assuan is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Assuan is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <assert.h>
+#ifdef HAVE_W32_SYSTEM
+#include <process.h>
+#endif
+#include "assuan-defs.h"
+
+
+/* Extended version of write(2) to guarantee that all bytes are
+ written. Returns 0 on success or -1 and ERRNO on failure. */
+static int
+writen (assuan_context_t ctx, const char *buffer, size_t length)
+{
+ while (length)
+ {
+ ssize_t nwritten = ctx->io->writefnc (ctx, buffer, length);
+
+ if (nwritten < 0)
+ {
+ if (errno == EINTR)
+ continue;
+ return -1; /* write error */
+ }
+ length -= nwritten;
+ buffer += nwritten;
+ }
+ return 0; /* okay */
+}
+
+/* Read an entire line. Returns 0 on success or -1 and ERRNo on
+ failure. EOF is indictated by setting the integer at address
+ R_EOF. */
+static int
+readline (assuan_context_t ctx, char *buf, size_t buflen,
+ int *r_nread, int *r_eof)
+{
+ size_t nleft = buflen;
+ char *p;
+
+ *r_eof = 0;
+ *r_nread = 0;
+ while (nleft > 0)
+ {
+ ssize_t n = ctx->io->readfnc (ctx, buf, nleft);
+
+ if (n < 0)
+ {
+ if (errno == EINTR)
+ continue;
+ return -1; /* read error */
+ }
+ else if (!n)
+ {
+ *r_eof = 1;
+ break; /* allow incomplete lines */
+ }
+ p = buf;
+ nleft -= n;
+ buf += n;
+ *r_nread += n;
+
+ p = memrchr (p, '\n', n);
+ if (p)
+ break; /* at least one full line available - that's enough for now */
+ }
+
+ return 0;
+}
+
+
+/* Function returns an Assuan error. */
+assuan_error_t
+_assuan_read_line (assuan_context_t ctx)
+{
+ char *line = ctx->inbound.line;
+ int nread, atticlen;
+ int rc;
+ char *endp = 0;
+
+ if (ctx->inbound.eof)
+ return _assuan_error (-1);
+
+ atticlen = ctx->inbound.attic.linelen;
+ if (atticlen)
+ {
+ memcpy (line, ctx->inbound.attic.line, atticlen);
+ ctx->inbound.attic.linelen = 0;
+
+ endp = memchr (line, '\n', atticlen);
+ if (endp)
+ /* Found another line in the attic. */
+ {
+ rc = 0;
+ nread = atticlen;
+ atticlen = 0;
+ }
+ else
+ /* There is pending data but not a full line. */
+ {
+ assert (atticlen < LINELENGTH);
+ rc = readline (ctx, line + atticlen,
+ LINELENGTH - atticlen, &nread, &ctx->inbound.eof);
+ }
+ }
+ else
+ /* No pending data. */
+ rc = readline (ctx, line, LINELENGTH,
+ &nread, &ctx->inbound.eof);
+ if (rc)
+ {
+ if (ctx->log_fp)
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: <- [Error: %s]\n",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd,
+ strerror (errno));
+ return _assuan_error (ASSUAN_Read_Error);
+ }
+ if (!nread)
+ {
+ assert (ctx->inbound.eof);
+ if (ctx->log_fp)
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: <- [EOF]\n",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+ return _assuan_error (-1);
+ }
+
+ ctx->inbound.attic.pending = 0;
+ nread += atticlen;
+
+ if (! endp)
+ endp = memchr (line, '\n', nread);
+
+ if (endp)
+ {
+ unsigned monitor_result;
+ int n = endp - line + 1;
+
+ if (n < nread)
+ /* LINE contains more than one line. We copy it to the attic
+ now as handlers are allowed to modify the passed
+ buffer. */
+ {
+ int len = nread - n;
+ memcpy (ctx->inbound.attic.line, endp + 1, len);
+ ctx->inbound.attic.pending = memrchr (endp + 1, '\n', len) ? 1 : 0;
+ ctx->inbound.attic.linelen = len;
+ }
+
+ if (endp != line && endp[-1] == '\r')
+ endp --;
+ *endp = 0;
+
+ ctx->inbound.linelen = endp - line;
+
+ monitor_result = (ctx->io_monitor
+ ? ctx->io_monitor (ctx, 0,
+ ctx->inbound.line,
+ ctx->inbound.linelen)
+ : 0);
+ if ( (monitor_result & 2) )
+ ctx->inbound.linelen = 0;
+
+ if (ctx->log_fp && !(monitor_result & 1))
+ {
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: <- ",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+ if (ctx->confidential)
+ fputs ("[Confidential data not shown]", ctx->log_fp);
+ else
+ _assuan_log_print_buffer (ctx->log_fp,
+ ctx->inbound.line,
+ ctx->inbound.linelen);
+ putc ('\n', ctx->log_fp);
+ }
+ return 0;
+ }
+ else
+ {
+ if (ctx->log_fp)
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: <- [Invalid line]\n",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+ *line = 0;
+ ctx->inbound.linelen = 0;
+ return _assuan_error (ctx->inbound.eof
+ ? ASSUAN_Line_Not_Terminated
+ : ASSUAN_Line_Too_Long);
+ }
+}
+
+
+/* Read the next line from the client or server and return a pointer
+ in *LINE to a buffer holding the line. LINELEN is the length of
+ *LINE. The buffer is valid until the next read operation on it.
+ The caller may modify the buffer. The buffer is invalid (i.e. must
+ not be used) if an error is returned.
+
+ Returns 0 on success or an assuan error code.
+ See also: assuan_pending_line().
+*/
+assuan_error_t
+assuan_read_line (assuan_context_t ctx, char **line, size_t *linelen)
+{
+ assuan_error_t err;
+
+ if (!ctx)
+ return _assuan_error (ASSUAN_Invalid_Value);
+
+ err = _assuan_read_line (ctx);
+ *line = ctx->inbound.line;
+ *linelen = ctx->inbound.linelen;
+ return err;
+}
+
+
+/* Return true if a full line is buffered (i.e. an entire line may be
+ read without any I/O). */
+int
+assuan_pending_line (assuan_context_t ctx)
+{
+ return ctx && ctx->inbound.attic.pending;
+}
+
+
+assuan_error_t
+_assuan_write_line (assuan_context_t ctx, const char *prefix,
+ const char *line, size_t len)
+{
+ assuan_error_t rc = 0;
+ size_t prefixlen = prefix? strlen (prefix):0;
+ unsigned int monitor_result;
+
+ /* Make sure that the line is short enough. */
+ if (len + prefixlen + 2 > ASSUAN_LINELENGTH)
+ {
+ if (ctx->log_fp)
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: -> "
+ "[supplied line too long -truncated]\n",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+ if (prefixlen > 5)
+ prefixlen = 5;
+ if (len > ASSUAN_LINELENGTH - prefixlen - 2)
+ len = ASSUAN_LINELENGTH - prefixlen - 2 - 1;
+ }
+
+ monitor_result = (ctx->io_monitor
+ ? ctx->io_monitor (ctx, 1, line, len)
+ : 0);
+
+ /* Fixme: we should do some kind of line buffering. */
+ if (ctx->log_fp && !(monitor_result & 1))
+ {
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: -> ",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+ if (ctx->confidential)
+ fputs ("[Confidential data not shown]", ctx->log_fp);
+ else
+ {
+ if (prefixlen)
+ _assuan_log_print_buffer (ctx->log_fp, prefix, prefixlen);
+ _assuan_log_print_buffer (ctx->log_fp, line, len);
+ }
+ putc ('\n', ctx->log_fp);
+ }
+
+ if (prefixlen && !(monitor_result & 2))
+ {
+ rc = writen (ctx, prefix, prefixlen);
+ if (rc)
+ rc = _assuan_error (ASSUAN_Write_Error);
+ }
+ if (!rc && !(monitor_result & 2))
+ {
+ rc = writen (ctx, line, len);
+ if (rc)
+ rc = _assuan_error (ASSUAN_Write_Error);
+ if (!rc)
+ {
+ rc = writen (ctx, "\n", 1);
+ if (rc)
+ rc = _assuan_error (ASSUAN_Write_Error);
+ }
+ }
+ return rc;
+}
+
+
+assuan_error_t
+assuan_write_line (assuan_context_t ctx, const char *line)
+{
+ size_t len;
+ const char *s;
+
+ if (!ctx)
+ return _assuan_error (ASSUAN_Invalid_Value);
+
+ /* Make sure that we never take a LF from the user - this might
+ violate the protocol. */
+ s = strchr (line, '\n');
+ len = s? (s-line) : strlen (line);
+
+ if (ctx->log_fp && s)
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: -> "
+ "[supplied line contained a LF - truncated]\n",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+
+ return _assuan_write_line (ctx, NULL, line, len);
+}
+
+
+
+/* Write out the data in buffer as datalines with line wrapping and
+ percent escaping. This function is used for GNU's custom streams. */
+int
+_assuan_cookie_write_data (void *cookie, const char *buffer, size_t orig_size)
+{
+ assuan_context_t ctx = cookie;
+ size_t size = orig_size;
+ char *line;
+ size_t linelen;
+
+ if (ctx->outbound.data.error)
+ return 0;
+
+ line = ctx->outbound.data.line;
+ linelen = ctx->outbound.data.linelen;
+ line += linelen;
+ while (size)
+ {
+ unsigned int monitor_result;
+
+ /* Insert data line header. */
+ if (!linelen)
+ {
+ *line++ = 'D';
+ *line++ = ' ';
+ linelen += 2;
+ }
+
+ /* Copy data, keep space for the CRLF and to escape one character. */
+ while (size && linelen < LINELENGTH-2-2)
+ {
+ if (*buffer == '%' || *buffer == '\r' || *buffer == '\n')
+ {
+ sprintf (line, "%%%02X", *(unsigned char*)buffer);
+ line += 3;
+ linelen += 3;
+ buffer++;
+ }
+ else
+ {
+ *line++ = *buffer++;
+ linelen++;
+ }
+ size--;
+ }
+
+
+ monitor_result = (ctx->io_monitor
+ ? ctx->io_monitor (ctx, 1,
+ ctx->outbound.data.line, linelen)
+ : 0);
+
+ if (linelen >= LINELENGTH-2-2)
+ {
+ if (ctx->log_fp && !(monitor_result & 1))
+ {
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: -> ",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+
+ if (ctx->confidential)
+ fputs ("[Confidential data not shown]", ctx->log_fp);
+ else
+ _assuan_log_print_buffer (ctx->log_fp,
+ ctx->outbound.data.line,
+ linelen);
+ putc ('\n', ctx->log_fp);
+ }
+ *line++ = '\n';
+ linelen++;
+ if ( !(monitor_result & 2)
+ && writen (ctx, ctx->outbound.data.line, linelen))
+ {
+ ctx->outbound.data.error = _assuan_error (ASSUAN_Write_Error);
+ return 0;
+ }
+ line = ctx->outbound.data.line;
+ linelen = 0;
+ }
+ }
+
+ ctx->outbound.data.linelen = linelen;
+ return (int)orig_size;
+}
+
+
+/* Write out any buffered data
+ This function is used for GNU's custom streams */
+int
+_assuan_cookie_write_flush (void *cookie)
+{
+ assuan_context_t ctx = cookie;
+ char *line;
+ size_t linelen;
+ unsigned int monitor_result;
+
+ if (ctx->outbound.data.error)
+ return 0;
+
+ line = ctx->outbound.data.line;
+ linelen = ctx->outbound.data.linelen;
+ line += linelen;
+
+ monitor_result = (ctx->io_monitor
+ ? ctx->io_monitor (ctx, 1,
+ ctx->outbound.data.line, linelen)
+ : 0);
+
+ if (linelen)
+ {
+ if (ctx->log_fp && !(monitor_result & 1))
+ {
+ fprintf (ctx->log_fp, "%s[%u.%d] DBG: -> ",
+ assuan_get_assuan_log_prefix (),
+ (unsigned int)getpid (), ctx->inbound.fd);
+ if (ctx->confidential)
+ fputs ("[Confidential data not shown]", ctx->log_fp);
+ else
+ _assuan_log_print_buffer (ctx->log_fp,
+ ctx->outbound.data.line, linelen);
+ putc ('\n', ctx->log_fp);
+ }
+ *line++ = '\n';
+ linelen++;
+ if ( !(monitor_result & 2)
+ && writen (ctx, ctx->outbound.data.line, linelen))
+ {
+ ctx->outbound.data.error = _assuan_error (ASSUAN_Write_Error);
+ return 0;
+ }
+ ctx->outbound.data.linelen = 0;
+ }
+ return 0;
+}
+
+
+/**
+ * assuan_send_data:
+ * @ctx: An assuan context
+ * @buffer: Data to send or NULL to flush
+ * @length: length of the data to send/
+ *
+ * This function may be used by the server or the client to send data
+ * lines. The data will be escaped as required by the Assuan protocol
+ * and may get buffered until a line is full. To force sending the
+ * data out @buffer may be passed as NULL (in which case @length must
+ * also be 0); however when used by a client this flush operation does
+ * also send the terminating "END" command to terminate the reponse on
+ * a INTQUIRE response. However, when assuan_transact() is used, this
+ * function takes care of sending END itself.
+ *
+ * Return value: 0 on success or an error code
+ **/
+
+assuan_error_t
+assuan_send_data (assuan_context_t ctx, const void *buffer, size_t length)
+{
+ if (!ctx)
+ return _assuan_error (ASSUAN_Invalid_Value);
+ if (!buffer && length)
+ return _assuan_error (ASSUAN_Invalid_Value);
+
+ if (!buffer)
+ { /* flush what we have */
+ _assuan_cookie_write_flush (ctx);
+ if (ctx->outbound.data.error)
+ return ctx->outbound.data.error;
+ if (!ctx->is_server)
+ return assuan_write_line (ctx, "END");
+ }
+ else
+ {
+ _assuan_cookie_write_data (ctx, buffer, length);
+ if (ctx->outbound.data.error)
+ return ctx->outbound.data.error;
+ }
+
+ return 0;
+}
+
+assuan_error_t
+assuan_sendfd (assuan_context_t ctx, int fd)
+{
+ /* It is explicitly allowed to use (NULL, -1) as a runtime test to
+ check whether descriptor passing is available. */
+ if (!ctx && fd == -1)
+#ifdef USE_DESCRIPTOR_PASSING
+ return 0;
+#else
+ return _assuan_error (ASSUAN_Not_Implemented);
+#endif
+
+ if (! ctx->io->sendfd)
+ return set_error (ctx, Not_Implemented,
+ "server does not support sending and receiving "
+ "of file descriptors");
+ return ctx->io->sendfd (ctx, fd);
+}
+
+assuan_error_t
+assuan_receivefd (assuan_context_t ctx, int *fd)
+{
+ if (! ctx->io->receivefd)
+ return set_error (ctx, Not_Implemented,
+ "server does not support sending and receiving "
+ "of file descriptors");
+ return ctx->io->receivefd (ctx, fd);
+}