diff options
Diffstat (limited to 'camel/camel-pgp-context.c')
| -rw-r--r-- | camel/camel-pgp-context.c | 1441 |
1 files changed, 0 insertions, 1441 deletions
diff --git a/camel/camel-pgp-context.c b/camel/camel-pgp-context.c deleted file mode 100644 index 16b3ea72b7..0000000000 --- a/camel/camel-pgp-context.c +++ /dev/null @@ -1,1441 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Authors: Jeffrey Stedfast <fejj@ximian.com> - * - * Copyright 2001 Ximian, Inc. (www.ximian.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program 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 - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - * - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include "camel-pgp-context.h" - -#include "camel-stream-fs.h" -#include "camel-stream-mem.h" - -#include "camel-operation.h" - -#include "camel-charset-map.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <errno.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <dirent.h> - -#include <signal.h> -#include <sys/ioctl.h> -#include <sys/time.h> -#include <sys/types.h> -#include <sys/wait.h> -#include <termios.h> -#include <unistd.h> - -#include <iconv.h> -#include <gal/unicode/gunicode.h> -#include <gal/util/e-iconv.h> - -#define d(x) - -struct _CamelPgpContextPrivate { - CamelPgpType type; - char *path; -}; - -static int pgp_sign (CamelCipherContext *ctx, const char *userid, CamelCipherHash hash, - CamelStream *istream, CamelStream *ostream, CamelException *ex); -static int pgp_clearsign (CamelCipherContext *context, const char *userid, - CamelCipherHash hash, CamelStream *istream, - CamelStream *ostream, CamelException *ex); -static CamelCipherValidity *pgp_verify (CamelCipherContext *context, CamelCipherHash hash, - CamelStream *istream, CamelStream *sigstream, - CamelException *ex); -static int pgp_encrypt (CamelCipherContext *context, gboolean sign, const char *userid, - GPtrArray *recipients, CamelStream *istream, CamelStream *ostream, - CamelException *ex); -static int pgp_decrypt (CamelCipherContext *context, CamelStream *istream, - CamelStream *ostream, CamelException *ex); - -static CamelCipherContextClass *parent_class; - -static void -camel_pgp_context_init (CamelPgpContext *context) -{ - context->priv = g_new0 (struct _CamelPgpContextPrivate, 1); -} - -static void -camel_pgp_context_finalise (CamelObject *o) -{ - CamelPgpContext *context = (CamelPgpContext *)o; - - g_free (context->priv->path); - - g_free (context->priv); -} - -static void -camel_pgp_context_class_init (CamelPgpContextClass *camel_pgp_context_class) -{ - CamelCipherContextClass *camel_cipher_context_class = - CAMEL_CIPHER_CONTEXT_CLASS (camel_pgp_context_class); - - parent_class = CAMEL_CIPHER_CONTEXT_CLASS (camel_type_get_global_classfuncs (camel_cipher_context_get_type ())); - - camel_cipher_context_class->sign = pgp_sign; - camel_cipher_context_class->clearsign = pgp_clearsign; - camel_cipher_context_class->verify = pgp_verify; - camel_cipher_context_class->encrypt = pgp_encrypt; - camel_cipher_context_class->decrypt = pgp_decrypt; -} - -CamelType -camel_pgp_context_get_type (void) -{ - static CamelType type = CAMEL_INVALID_TYPE; - - if (type == CAMEL_INVALID_TYPE) { - type = camel_type_register (camel_cipher_context_get_type (), - "CamelPgpContext", - sizeof (CamelPgpContext), - sizeof (CamelPgpContextClass), - (CamelObjectClassInitFunc) camel_pgp_context_class_init, - NULL, - (CamelObjectInitFunc) camel_pgp_context_init, - (CamelObjectFinalizeFunc) camel_pgp_context_finalise); - } - - return type; -} - - -/** - * camel_pgp_context_new: - * @session: CamelSession - * @type: One of CAMEL_PGP_TYPE_PGP2, PGP5, GPG, or PGP6 - * @path: path to PGP binary - * @remember: Remember the pgp passphrase - * - * This creates a new CamelPgpContext object which is used to sign, - * verify, encrypt and decrypt streams. - * - * Return value: the new CamelPgpContext - **/ -CamelPgpContext * -camel_pgp_context_new (CamelSession *session, CamelPgpType type, const char *path) -{ - CamelPgpContext *context; - - g_return_val_if_fail (session != NULL, NULL); - - if (type == CAMEL_PGP_TYPE_NONE || !path || !*path) - return NULL; - - context = CAMEL_PGP_CONTEXT (camel_object_new (CAMEL_PGP_CONTEXT_TYPE)); - - camel_cipher_context_construct (CAMEL_CIPHER_CONTEXT (context), session); - - context->priv->type = type; - context->priv->path = g_strdup (path); - - return context; -} - - - -static const gchar * -pgp_get_type_as_string (CamelPgpType type) -{ - switch (type) { - case CAMEL_PGP_TYPE_PGP2: - return "PGP 2.6.x"; - case CAMEL_PGP_TYPE_PGP5: - return "PGP 5.0"; - case CAMEL_PGP_TYPE_PGP6: - return "PGP 6.5.8"; - case CAMEL_PGP_TYPE_GPG: - return "GnuPG"; - default: - g_assert_not_reached (); - return NULL; - } -} - -static gchar * -pgp_get_passphrase (CamelSession *session, CamelPgpType pgp_type, char *userid) -{ - gchar *passphrase, *prompt; - const char *type; - - type = pgp_get_type_as_string (pgp_type); - - if (userid) - prompt = g_strdup_printf (_("Please enter your %s passphrase for %s"), - type, userid); - else - prompt = g_strdup_printf (_("Please enter your %s passphrase"), - type); - - /* Use the userid as a key if possible, else be generic and use the type */ - passphrase = camel_session_get_password (session, prompt, TRUE, - NULL, userid ? userid : type, - NULL); - g_free (prompt); - - return passphrase; -} - -static void -pgp_forget_passphrase (CamelSession *session, CamelPgpType pgp_type, char *userid) -{ - const char *type = NULL; - - if (!userid) - type = pgp_get_type_as_string (pgp_type); - - camel_session_forget_password (session, NULL, userid ? userid : type, NULL); -} - -static void -pass_free (char *passphrase) -{ - if (passphrase) { - memset (passphrase, 0, strlen (passphrase)); - g_free (passphrase); - } -} - -static int -cleanup_child (pid_t child) -{ - int status; - pid_t wait_result; - sigset_t mask, omask; - - /* PGP5 closes fds before exiting, meaning this might be called - * too early. So wait a bit for the result. - */ - sigemptyset (&mask); - sigaddset (&mask, SIGALRM); - sigprocmask (SIG_BLOCK, &mask, &omask); - alarm (1); - wait_result = waitpid (child, &status, 0); - alarm (0); - sigprocmask (SIG_SETMASK, &omask, NULL); - - if (wait_result == -1 && errno == EINTR) { - /* The child is hanging: send a friendly reminder. */ - kill (child, SIGTERM); - sleep (1); - wait_result = waitpid (child, &status, WNOHANG); - if (wait_result == 0) { - /* Still hanging; use brute force. */ - kill (child, SIGKILL); - sleep (1); - wait_result = waitpid (child, &status, WNOHANG); - } - } - - if (wait_result != -1 && WIFEXITED (status)) - return WEXITSTATUS (status); - else - return -1; -} - -static void -cleanup_before_exec (int fd) -{ - int maxfd, i; - - maxfd = sysconf (_SC_OPEN_MAX); - if (maxfd < 0) - return; - - /* Loop over all fds. */ - for (i = 0; i < maxfd; i++) { - if ((STDIN_FILENO != i) && - (STDOUT_FILENO != i) && - (STDERR_FILENO != i) && - (fd != i)) - close (i); - } -} - -static int -crypto_exec_with_passwd (const char *path, char *argv[], const char *input, int inlen, - int passwd_fds[], const char *passphrase, - char **output, int *outlen, char **diagnostics) -{ - gboolean eof_seen, diag_eof_seen, passwd_eof_seen, input_eof_seen; - size_t passwd_remaining, passwd_incr, input_remaining, input_incr; - size_t size, alloc_size, diag_size, diag_alloc_size; - int select_result, read_len, write_len, cancel_fd; - int fds[6], *ip_fds, *op_fds, *diag_fds; - const char *passwd_next, *input_next; - char *buf = NULL, *diag_buf = NULL; - fd_set fdset, write_fdset; - struct timeval timeout; - size_t tmp_len; - pid_t child; - int i; - - if (camel_operation_cancel_check (NULL)) { - errno = EINTR; - return -1; - } - - for (i = 0; i < 6; i++) - fds[i] = -1; - - ip_fds = fds; - op_fds = fds + 2; - diag_fds = fds + 4; - - if ((pipe (ip_fds) == -1) || (pipe (op_fds) == -1) || (pipe (diag_fds) == -1)) { - *diagnostics = g_strdup_printf ("Couldn't create pipe to %s: %s", - path, g_strerror (errno)); - - for (i = 0; i < 6; i++) - close (fds[i]); - - close (passwd_fds[0]); - close (passwd_fds[1]); - - return -1; - } - - if (!(child = fork ())) { - /* In child */ - - if ((dup2 (ip_fds[0], STDIN_FILENO) < 0 ) || - (dup2 (op_fds[1], STDOUT_FILENO) < 0 ) || - (dup2 (diag_fds[1], STDERR_FILENO) < 0 )) { - _exit (255); - } - - /* Dissociate from evolution-mail's controlling - * terminal so that pgp/gpg won't be able to read from - * it: PGP 2 will fall back to asking for the password - * on /dev/tty if the passed-in password is incorrect. - * This will make that fail rather than hanging. - */ - setsid (); - - /* Close excess fds */ - cleanup_before_exec (passwd_fds[0]); - - execvp (path, argv); - fprintf (stderr, "Could not execute %s: %s\n", argv[0], - g_strerror (errno)); - _exit (255); - } else if (child < 0) { - *diagnostics = g_strdup_printf ("Cannot fork %s: %s", - argv[0], g_strerror (errno)); - return -1; - } - - /* Parent */ - close (ip_fds[0]); - close (op_fds[1]); - close (diag_fds[1]); - close (passwd_fds[0]); - - fcntl (ip_fds[1], F_SETFL, O_NONBLOCK); - fcntl (op_fds[0], F_SETFL, O_NONBLOCK); - fcntl (diag_fds[0], F_SETFL, O_NONBLOCK); - - timeout.tv_sec = 10; /* timeout in seconds */ - timeout.tv_usec = 0; - - size = diag_size = 0; - alloc_size = 4096; - diag_alloc_size = 1024; - eof_seen = diag_eof_seen = FALSE; - - buf = g_malloc (alloc_size); - diag_buf = g_malloc (diag_alloc_size); - - passwd_next = passphrase; - passwd_remaining = passphrase ? strlen (passphrase) : 0; - passwd_incr = fpathconf (passwd_fds[1], _PC_PIPE_BUF); - /* Use a reasonable default value on error. */ - if (passwd_incr <= 0) - passwd_incr = 1024; - passwd_eof_seen = FALSE; - - input_next = input; - input_remaining = inlen; - input_incr = fpathconf (ip_fds[1], _PC_PIPE_BUF); - if (input_incr <= 0) - input_incr = 1024; - input_eof_seen = FALSE; - - cancel_fd = camel_operation_cancel_fd (NULL); - - while (!(eof_seen && diag_eof_seen)) { - int max = 0; - - FD_ZERO (&fdset); - if (!eof_seen) { - FD_SET (op_fds[0], &fdset); - max = op_fds[0]; - } - if (!diag_eof_seen) { - FD_SET (diag_fds[0], &fdset); - max = MAX (max, diag_fds[0]); - } - if (cancel_fd != -1) { - FD_SET (cancel_fd, &fdset); - max = MAX (max, cancel_fd); - } - - FD_ZERO (&write_fdset); - if (!passwd_eof_seen) { - FD_SET (passwd_fds[1], &write_fdset); - max = MAX (max, passwd_fds[1]); - } - if (!input_eof_seen) { - FD_SET (ip_fds[1], &write_fdset); - max = MAX (max, ip_fds[1]); - } - - select_result = select (max + 1, &fdset, &write_fdset, - NULL, &timeout); - - if (cancel_fd != -1 && FD_ISSET (cancel_fd, &fdset)) { - /* user-cancelled */ - break; - } - - if (select_result < 0) { - if (errno == EINTR) - continue; - break; - } - if (select_result == 0) { - /* timeout */ - break; - } - - if (FD_ISSET (op_fds[0], &fdset)) { - /* More output is available. */ - - if (size + 4096 > alloc_size) { - alloc_size += 4096; - buf = g_realloc (buf, alloc_size); - } - read_len = read (op_fds[0], &buf[size], - alloc_size - size - 1); - if (read_len < 0) { - if (errno == EINTR) - continue; - break; - } - if (read_len == 0) - eof_seen = TRUE; - size += read_len; - } - - if (FD_ISSET (diag_fds[0], &fdset) ) { - /* More stderr is available. */ - - if (diag_size + 1024 > diag_alloc_size) { - diag_alloc_size += 1024; - diag_buf = g_realloc (diag_buf, - diag_alloc_size); - } - - read_len = read (diag_fds[0], &diag_buf[diag_size], - diag_alloc_size - diag_size - 1); - if (read_len < 0) { - if (errno == EINTR) - continue; - break; - } - if (read_len == 0) - diag_eof_seen = TRUE; - diag_size += read_len; - } - - if (FD_ISSET (passwd_fds[1], &write_fdset)) { - /* Ready for more password input. */ - - tmp_len = passwd_incr; - if (tmp_len > passwd_remaining) - tmp_len = passwd_remaining; - write_len = write (passwd_fds[1], passwd_next, - tmp_len); - if (write_len < 0) { - if (errno == EINTR) - continue; - break; - } - passwd_next += write_len; - passwd_remaining -= write_len; - if (passwd_remaining == 0) { - close (passwd_fds[1]); - passwd_eof_seen = TRUE; - } - } - - if (FD_ISSET (ip_fds[1], &write_fdset)) { - /* Ready for more ciphertext input. */ - - tmp_len = input_incr; - if (tmp_len > input_remaining) - tmp_len = input_remaining; - write_len = write (ip_fds[1], input_next, tmp_len); - if (write_len < 0) { - if (errno == EINTR) - continue; - break; - } - input_next += write_len; - input_remaining -= write_len; - if (input_remaining == 0 ) { - close (ip_fds[1]); - input_eof_seen = TRUE; - } - } - } - - buf[size] = 0; - diag_buf[diag_size] = 0; - close (op_fds[0]); - close (diag_fds[0]); - - if (!passwd_eof_seen) - close (passwd_fds[1]); - - *output = buf; - if (outlen) - *outlen = size; - *diagnostics = diag_buf; - - return cleanup_child (child); -} - - -/*----------------------------------------------------------------------* - * Public crypto functions - *----------------------------------------------------------------------*/ - -static int -pgp_sign (CamelCipherContext *ctx, const char *userid, CamelCipherHash hash, - CamelStream *istream, CamelStream *ostream, CamelException *ex) -{ - CamelPgpContext *context = CAMEL_PGP_CONTEXT (ctx); - GByteArray *plaintext; - CamelStream *stream; - char *argv[20]; - char *ciphertext = NULL; - char *diagnostics = NULL; - char *passphrase = NULL; - char *hash_str = NULL; - int passwd_fds[2]; - char passwd_fd[32]; - int retval, i; - - /* check for the now unsupported pgp 2.6.x type */ - if (context->priv->type == CAMEL_PGP_TYPE_PGP2) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - "PGP 2.6.x is no longer supported."); - return -1; - } - - /* get the plaintext in a form we can use */ - plaintext = g_byte_array_new (); - stream = camel_stream_mem_new (); - camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), plaintext); - camel_stream_write_to_stream (istream, stream); - camel_object_unref (CAMEL_OBJECT (stream)); - - if (!plaintext->len) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot sign this message: no plaintext to sign")); - goto exception; - } - - passphrase = pgp_get_passphrase (ctx->session, context->priv->type, (char *) userid); - if (!passphrase) { - camel_exception_set (ex, CAMEL_EXCEPTION_USER_CANCEL, - _("Cannot sign this message: no password provided")); - goto exception; - } - - if (pipe (passwd_fds) < 0) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot sign this message: couldn't create pipe to GPG/PGP: %s"), - g_strerror (errno)); - goto exception; - } - - switch (hash) { - case CAMEL_CIPHER_HASH_DEFAULT: - hash_str = NULL; - break; - case CAMEL_CIPHER_HASH_MD5: - hash_str = "MD5"; - break; - case CAMEL_CIPHER_HASH_SHA1: - hash_str = "SHA1"; - break; - default: - g_assert_not_reached (); - break; - } - - i = 0; - switch (context->priv->type) { - case CAMEL_PGP_TYPE_GPG: - argv[i++] = "gpg"; - - argv[i++] = "--sign"; - argv[i++] = "-b"; - if (hash_str) { - argv[i++] = "--digest-algo"; - argv[i++] = hash_str; - } - - if (userid) { - argv[i++] = "-u"; - argv[i++] = (char *) userid; - } - - argv[i++] = "--verbose"; - argv[i++] = "--no-secmem-warning"; - argv[i++] = "--no-greeting"; - argv[i++] = "--yes"; - argv[i++] = "--batch"; - - argv[i++] = "--armor"; - - argv[i++] = "--output"; - argv[i++] = "-"; /* output to stdout */ - - argv[i++] = "--passphrase-fd"; - sprintf (passwd_fd, "%d", passwd_fds[0]); - argv[i++] = passwd_fd; - break; - case CAMEL_PGP_TYPE_PGP5: - /* FIXME: respect hash */ - argv[i++] = "pgps"; - - if (userid) { - argv[i++] = "-u"; - argv[i++] = (char *) userid; - } - - argv[i++] = "-b"; - argv[i++] = "-f"; - argv[i++] = "-z"; - argv[i++] = "-a"; - argv[i++] = "-o"; - argv[i++] = "-"; /* output to stdout */ - - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - break; - case CAMEL_PGP_TYPE_PGP2: - case CAMEL_PGP_TYPE_PGP6: - /* FIXME: respect hash */ - argv[i++] = "pgp"; - - if (userid) { - argv[i++] = "-u"; - argv[i++] = (char *) userid; - } - - argv[i++] = "-f"; - argv[i++] = "-a"; - argv[i++] = "-o"; - argv[i++] = "-"; - - argv[i++] = "-sb"; /* create a detached signature */ - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - break; - default: - g_assert_not_reached (); - break; - } - - argv[i++] = NULL; - - retval = crypto_exec_with_passwd (context->priv->path, argv, - plaintext->data, plaintext->len, - passwd_fds, passphrase, - &ciphertext, NULL, - &diagnostics); - - g_byte_array_free (plaintext, TRUE); - pass_free (passphrase); - - if (retval != 0 || !*ciphertext) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, diagnostics); - g_free (diagnostics); - g_free (ciphertext); - pgp_forget_passphrase (ctx->session, context->priv->type, (char *) userid); - - return -1; - } - - g_free (diagnostics); - - camel_stream_write (ostream, ciphertext, strlen (ciphertext)); - g_free (ciphertext); - - return 0; - - exception: - - g_byte_array_free (plaintext, TRUE); - - if (passphrase) { - pgp_forget_passphrase (ctx->session, context->priv->type, (char *) userid); - pass_free (passphrase); - } - - return -1; -} - - -static int -pgp_clearsign (CamelCipherContext *ctx, const char *userid, CamelCipherHash hash, - CamelStream *istream, CamelStream *ostream, CamelException *ex) -{ - CamelPgpContext *context = CAMEL_PGP_CONTEXT (ctx); - GByteArray *plaintext; - CamelStream *stream; - char *argv[15]; - char *ciphertext = NULL; - char *diagnostics = NULL; - char *passphrase = NULL; - char *hash_str = NULL; - int passwd_fds[2]; - char passwd_fd[32]; - int retval, i; - - /* check for the now unsupported pgp 2.6.x type */ - if (context->priv->type == CAMEL_PGP_TYPE_PGP2) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - "PGP 2.6.x is no longer supported."); - return -1; - } - - /* get the plaintext in a form we can use */ - plaintext = g_byte_array_new (); - stream = camel_stream_mem_new (); - camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), plaintext); - camel_stream_write_to_stream (istream, stream); - camel_object_unref (CAMEL_OBJECT (stream)); - - if (!plaintext->len) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot sign this message: no plaintext to clearsign")); - goto exception; - } - - passphrase = pgp_get_passphrase (ctx->session, context->priv->type, (char *) userid); - if (!passphrase) { - camel_exception_set (ex, CAMEL_EXCEPTION_USER_CANCEL, - _("Cannot sign this message: no password provided")); - goto exception; - } - - if (pipe (passwd_fds) < 0) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot sign this message: couldn't create pipe to GPG/PGP: %s"), - g_strerror (errno)); - goto exception; - } - - switch (hash) { - case CAMEL_CIPHER_HASH_DEFAULT: - hash_str = NULL; - break; - case CAMEL_CIPHER_HASH_MD5: - hash_str = "MD5"; - break; - case CAMEL_CIPHER_HASH_SHA1: - hash_str = "SHA1"; - break; - default: - g_assert_not_reached (); - break; - } - - i = 0; - switch (context->priv->type) { - case CAMEL_PGP_TYPE_GPG: - argv[i++] = "gpg"; - - argv[i++] = "--clearsign"; - - if (hash_str) { - argv[i++] = "--digest-algo"; - argv[i++] = hash_str; - } - - if (userid) { - argv[i++] = "-u"; - argv[i++] = (char *) userid; - } - - argv[i++] = "--verbose"; - argv[i++] = "--no-secmem-warning"; - argv[i++] = "--no-greeting"; - argv[i++] = "--yes"; - argv[i++] = "--batch"; - - argv[i++] = "--armor"; - - argv[i++] = "--output"; - argv[i++] = "-"; /* output to stdout */ - - argv[i++] = "--passphrase-fd"; - sprintf (passwd_fd, "%d", passwd_fds[0]); - argv[i++] = passwd_fd; - break; - case CAMEL_PGP_TYPE_PGP5: - /* FIXME: modify to respect hash */ - argv[i++] = "pgps"; - - if (userid) { - argv[i++] = "-u"; - argv[i++] = (char *) userid; - } - - argv[i++] = "-f"; - argv[i++] = "-z"; - argv[i++] = "-a"; - argv[i++] = "-o"; - argv[i++] = "-"; /* output to stdout */ - - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - break; - case CAMEL_PGP_TYPE_PGP2: - case CAMEL_PGP_TYPE_PGP6: - /* FIXME: modify to respect hash */ - argv[i++] = "pgp"; - - if (userid) { - argv[i++] = "-u"; - argv[i++] = (char *) userid; - } - - argv[i++] = "-f"; - argv[i++] = "-a"; - argv[i++] = "-o"; - argv[i++] = "-"; - - argv[i++] = "-st"; - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - break; - default: - g_assert_not_reached (); - break; - } - - argv[i++] = NULL; - - retval = crypto_exec_with_passwd (context->priv->path, argv, - plaintext->data, plaintext->len, - passwd_fds, passphrase, - &ciphertext, NULL, - &diagnostics); - - g_byte_array_free (plaintext, TRUE); - pass_free (passphrase); - - if (retval != 0 || !*ciphertext) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, diagnostics); - g_free (diagnostics); - g_free (ciphertext); - pgp_forget_passphrase (ctx->session, context->priv->type, (char *) userid); - } - - g_free (diagnostics); - - camel_stream_write (ostream, ciphertext, strlen (ciphertext)); - g_free (ciphertext); - - return 0; - - exception: - - g_byte_array_free (plaintext, TRUE); - - if (passphrase) { - pgp_forget_passphrase (ctx->session, context->priv->type, (char *) userid); - pass_free (passphrase); - } - - return -1; -} - - -static char * -swrite (CamelStream *istream) -{ - CamelStream *ostream; - char *template; - int fd; - - template = g_strdup ("/tmp/evolution-pgp.XXXXXX"); - fd = mkstemp (template); - if (fd == -1) { - g_free (template); - return NULL; - } - - ostream = camel_stream_fs_new_with_fd (fd); - camel_stream_write_to_stream (istream, ostream); - camel_object_unref (CAMEL_OBJECT (ostream)); - - return template; -} - - -static CamelCipherValidity * -pgp_verify (CamelCipherContext *ctx, CamelCipherHash hash, CamelStream *istream, - CamelStream *sigstream, CamelException *ex) -{ - CamelPgpContext *context = CAMEL_PGP_CONTEXT (ctx); - CamelCipherValidity *valid = NULL; - GByteArray *plaintext; - CamelStream *stream; - char *argv[20]; - char *cleartext = NULL; - char *diagnostics = NULL; - int passwd_fds[2]; - char *sigfile = NULL; - int retval, i, clearlen; - - /* check for the now unsupported pgp 2.6.x type */ - if (context->priv->type == CAMEL_PGP_TYPE_PGP2) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - "PGP 2.6.x is no longer supported."); - return NULL; - } - - /* get the plaintext in a form we can use */ - plaintext = g_byte_array_new (); - stream = camel_stream_mem_new (); - camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), plaintext); - camel_stream_write_to_stream (istream, stream); - camel_object_unref (CAMEL_OBJECT (stream)); - - if (!plaintext->len) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot verify this message: no plaintext to verify")); - goto exception; - } - - if (pipe (passwd_fds) < 0) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot verify this message: couldn't create pipe to GPG/PGP: %s"), - g_strerror (errno)); - goto exception; - } - - if (sigstream != NULL) { - /* We are going to verify a detached signature so save - the signature to a temp file. */ - sigfile = swrite (sigstream); - if (!sigfile) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot verify this message: couldn't create temp file: %s"), - g_strerror (errno)); - goto exception; - } - } - - i = 0; - switch (context->priv->type) { - case CAMEL_PGP_TYPE_GPG: - argv[i++] = "gpg"; - - argv[i++] = "--verbose"; - argv[i++] = "--no-secmem-warning"; - argv[i++] = "--no-greeting"; - argv[i++] = "--no-tty"; - if (!camel_session_is_online (ctx->session)) - argv[i++] = "--no-auto-key-retrieve"; - - argv[i++] = "--yes"; - argv[i++] = "--batch"; - - argv[i++] = "--verify"; - - if (sigstream != NULL) - argv[i++] = sigfile; - - argv[i++] = "-"; - break; - case CAMEL_PGP_TYPE_PGP5: - argv[i++] = "pgpv"; - - argv[i++] = "-z"; - - if (sigstream != NULL) - argv[i++] = sigfile; - - argv[i++] = "-f"; - - break; - case CAMEL_PGP_TYPE_PGP2: - case CAMEL_PGP_TYPE_PGP6: - argv[i++] = "pgp"; - - if (sigstream != NULL) - argv[i++] = sigfile; - - argv[i++] = "-f"; - - break; - default: - g_assert_not_reached (); - break; - } - - argv[i++] = NULL; - - clearlen = 0; - retval = crypto_exec_with_passwd (context->priv->path, argv, - plaintext->data, plaintext->len, - passwd_fds, NULL, - &cleartext, &clearlen, - &diagnostics); - - g_byte_array_free (plaintext, TRUE); - - /* cleanup */ - if (sigfile) { - unlink (sigfile); - g_free (sigfile); - } - - valid = camel_cipher_validity_new (); - - if (retval != 0) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, diagnostics); - - camel_cipher_validity_set_valid (valid, FALSE); - } else { - camel_cipher_validity_set_valid (valid, TRUE); - } - - if (diagnostics) { - const char *locale; - char *desc, *outbuf; - size_t inlen, outlen; - iconv_t cd; - - inlen = strlen (diagnostics); - outlen = inlen * 4; - - desc = outbuf = g_new (unsigned char, outlen + 1); - - locale = e_iconv_locale_charset (); - if (!locale) - locale = "iso-8859-1"; - - cd = e_iconv_open ("UTF-8", locale); - if (cd != (iconv_t) -1) { - const char *inbuf; - size_t ret; - - inbuf = diagnostics; - ret = e_iconv (cd, &inbuf, &inlen, &outbuf, &outlen); - if (ret != (size_t) -1) { - e_iconv (cd, NULL, 0, &outbuf, &outlen); - } - e_iconv_close (cd); - - *outbuf = '\0'; - } else { - const char *inptr, *inend; - - g_warning ("CamelPgpContext::pgp_verify: cannot convert from %s to UTF-8", locale); - - inptr = diagnostics; - inend = inptr + inlen; - - while (inptr && inptr < inend && g_unichar_validate (g_utf8_get_char (inptr))) { - *outbuf++ = g_utf8_get_char (inptr) & 0xff; - inptr = g_utf8_next_char (inptr); - } - - *outbuf = '\0'; - } - - camel_cipher_validity_set_description (valid, desc); - g_free (desc); - } - - g_free (diagnostics); - g_free (cleartext); - - return valid; - - exception: - - g_byte_array_free (plaintext, TRUE); - - return NULL; -} - - -static int -pgp_encrypt (CamelCipherContext *ctx, gboolean sign, const char *userid, GPtrArray *recipients, - CamelStream *istream, CamelStream *ostream, CamelException *ex) -{ - CamelPgpContext *context = CAMEL_PGP_CONTEXT (ctx); - GByteArray *plaintext; - CamelStream *stream; - GPtrArray *argv; - int retval, r; - char *ciphertext = NULL; - char *diagnostics = NULL; - int passwd_fds[2]; - char passwd_fd[32]; - char *passphrase = NULL; - - /* check for the now unsupported pgp 2.6.x type */ - if (context->priv->type == CAMEL_PGP_TYPE_PGP2) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - "PGP 2.6.x is no longer supported."); - return -1; - } - - /* get the plaintext in a form we can use */ - plaintext = g_byte_array_new (); - stream = camel_stream_mem_new (); - camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), plaintext); - camel_stream_write_to_stream (istream, stream); - camel_object_unref (CAMEL_OBJECT (stream)); - - if (!plaintext->len) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot encrypt this message: no plaintext to encrypt")); - goto exception; - } - - if (sign) { - /* we only need a passphrase if we intend on signing */ - passphrase = pgp_get_passphrase (ctx->session, context->priv->type, - (char *) userid); - if (!passphrase) { - camel_exception_set (ex, CAMEL_EXCEPTION_USER_CANCEL, - _("Cannot encrypt this message: no password provided")); - goto exception; - } - } - - if (pipe (passwd_fds) < 0) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot encrypt this message: couldn't create pipe to GPG/PGP: %s"), - g_strerror (errno)); - - goto exception; - } - - /* check to make sure we have recipients */ - if (recipients->len == 0) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot encrypt this message: no recipients specified")); - - goto exception; - } - - argv = g_ptr_array_new (); - - switch (context->priv->type) { - case CAMEL_PGP_TYPE_GPG: - g_ptr_array_add (argv, "gpg"); - - g_ptr_array_add (argv, "--verbose"); - g_ptr_array_add (argv, "--no-secmem-warning"); - g_ptr_array_add (argv, "--no-greeting"); - g_ptr_array_add (argv, "--yes"); - g_ptr_array_add (argv, "--batch"); - - g_ptr_array_add (argv, "--armor"); - - for (r = 0; r < recipients->len; r++) { - g_ptr_array_add (argv, "-r"); - g_ptr_array_add (argv, recipients->pdata[r]); - } - - g_ptr_array_add (argv, "--output"); - g_ptr_array_add (argv, "-"); /* output to stdout */ - - g_ptr_array_add (argv, "--encrypt"); - - if (sign) { - g_ptr_array_add (argv, "--sign"); - - g_ptr_array_add (argv, "-u"); - g_ptr_array_add (argv, (char *) userid); - - g_ptr_array_add (argv, "--passphrase-fd"); - sprintf (passwd_fd, "%d", passwd_fds[0]); - g_ptr_array_add (argv, passwd_fd); - } - break; - case CAMEL_PGP_TYPE_PGP5: - g_ptr_array_add (argv, "pgpe"); - - for (r = 0; r < recipients->len; r++) { - g_ptr_array_add (argv, "-r"); - g_ptr_array_add (argv, recipients->pdata[r]); - } - - g_ptr_array_add (argv, "-f"); - g_ptr_array_add (argv, "-z"); - g_ptr_array_add (argv, "-a"); - g_ptr_array_add (argv, "-o"); - g_ptr_array_add (argv, "-"); /* output to stdout */ - - if (sign) { - g_ptr_array_add (argv, "-s"); - - g_ptr_array_add (argv, "-u"); - g_ptr_array_add (argv, (gchar *) userid); - - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - } - break; - case CAMEL_PGP_TYPE_PGP2: - case CAMEL_PGP_TYPE_PGP6: - g_ptr_array_add (argv, "pgp"); - g_ptr_array_add (argv, "-f"); - g_ptr_array_add (argv, "-e"); - g_ptr_array_add (argv, "-a"); - g_ptr_array_add (argv, "-o"); - g_ptr_array_add (argv, "-"); - - for (r = 0; r < recipients->len; r++) - g_ptr_array_add (argv, recipients->pdata[r]); - - if (sign) { - g_ptr_array_add (argv, "-s"); - - g_ptr_array_add (argv, "-u"); - g_ptr_array_add (argv, (gchar *) userid); - - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - } - break; - default: - g_assert_not_reached (); - break; - } - - g_ptr_array_add (argv, NULL); - - retval = crypto_exec_with_passwd (context->priv->path, - (char **) argv->pdata, - plaintext->data, plaintext->len, - passwd_fds, passphrase, - &ciphertext, NULL, - &diagnostics); - - g_byte_array_free (plaintext, TRUE); - - pass_free (passphrase); - g_ptr_array_free (argv, TRUE); - - if (retval != 0 || !*ciphertext) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, diagnostics); - g_free (diagnostics); - g_free (ciphertext); - if (sign) - pgp_forget_passphrase (ctx->session, context->priv->type, - (char *) userid); - - return -1; - } - - g_free (diagnostics); - - camel_stream_write (ostream, ciphertext, strlen (ciphertext)); - g_free (ciphertext); - - return 0; - - exception: - - g_byte_array_free (plaintext, TRUE); - - if (sign) { - pass_free (passphrase); - pgp_forget_passphrase (ctx->session, context->priv->type, (char *) userid); - } - - return -1; -} - - -static int -pgp_decrypt (CamelCipherContext *ctx, CamelStream *istream, - CamelStream *ostream, CamelException *ex) -{ - CamelPgpContext *context = CAMEL_PGP_CONTEXT (ctx); - GByteArray *ciphertext; - CamelStream *stream; - char *argv[15]; - char *plaintext = NULL; - int plainlen; - char *diagnostics = NULL; - char *passphrase = NULL; - int passwd_fds[2]; - char passwd_fd[32]; - int retval, i; - - /* check for the now unsupported pgp 2.6.x type */ - if (context->priv->type == CAMEL_PGP_TYPE_PGP2) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - "PGP 2.6.x is no longer supported."); - return -1; - } - - /* get the ciphertext in a form we can use */ - ciphertext = g_byte_array_new (); - stream = camel_stream_mem_new (); - camel_stream_mem_set_byte_array (CAMEL_STREAM_MEM (stream), ciphertext); - camel_stream_write_to_stream (istream, stream); - camel_object_unref (CAMEL_OBJECT (stream)); - - if (!ciphertext->len) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot decrypt this message: no ciphertext to decrypt")); - - goto exception; - } - - passphrase = pgp_get_passphrase (ctx->session, context->priv->type, NULL); - if (!passphrase) { - camel_exception_set (ex, CAMEL_EXCEPTION_USER_CANCEL, - _("Cannot decrypt this message: no password provided")); - - goto exception; - } - - if (pipe (passwd_fds) < 0) { - camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, - _("Cannot decrypt this message: couldn't create pipe to GPG/PGP: %s"), - g_strerror (errno)); - - goto exception; - } - - i = 0; - switch (context->priv->type) { - case CAMEL_PGP_TYPE_GPG: - argv[i++] = "gpg"; - - argv[i++] = "--verbose"; - argv[i++] = "--no-secmem-warning"; - argv[i++] = "--no-greeting"; - argv[i++] = "--yes"; - argv[i++] = "--batch"; - - if (!camel_session_is_online (ctx->session)) - argv[i++] = "--no-auto-key-retrieve"; - - argv[i++] = "--output"; - argv[i++] = "-"; /* output to stdout */ - - argv[i++] = "--decrypt"; - - argv[i++] = "--passphrase-fd"; - sprintf (passwd_fd, "%d", passwd_fds[0]); - argv[i++] = passwd_fd; - break; - case CAMEL_PGP_TYPE_PGP5: - argv[i++] = "pgpv"; - argv[i++] = "-f"; - argv[i++] = "+batchmode=1"; - - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - break; - case CAMEL_PGP_TYPE_PGP2: - case CAMEL_PGP_TYPE_PGP6: - argv[i++] = "pgp"; - argv[i++] = "-f"; - - sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]); - putenv (passwd_fd); - break; - default: - g_assert_not_reached (); - break; - } - - argv[i++] = NULL; - - retval = crypto_exec_with_passwd (context->priv->path, argv, - ciphertext->data, ciphertext->len, - passwd_fds, passphrase, - &plaintext, &plainlen, - &diagnostics); - - g_byte_array_free (ciphertext, TRUE); - pass_free (passphrase); - - /* gpg returns '1' if it succeedes in decrypting but can't verify the signature */ - if (retval != 0 || (context->priv->type == CAMEL_PGP_TYPE_GPG && retval == 1) || !*plaintext) { - camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, diagnostics); - g_free (plaintext); - g_free (diagnostics); - - pgp_forget_passphrase (ctx->session, context->priv->type, NULL); - - return -1; - } - - g_free (diagnostics); - - camel_stream_write (ostream, plaintext, plainlen); - g_free (plaintext); - - return 0; - - exception: - - g_byte_array_free (ciphertext, TRUE); - - if (passphrase) { - pgp_forget_passphrase (ctx->session, context->priv->type, NULL); - pass_free (passphrase); - } - - return -1; -} |