2008-12-15 [colin] 3.6.1cvs78
[claws.git] / src / plugins / pgpinline / pgpinline.c
index 1e31f863e0fbc6b82cdeacd1facc27c5578a4069..fd8d84b2218a93aeb24f9d965807e58e7ecef636 100644 (file)
@@ -1,11 +1,11 @@
 /*
- * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2006 Hiroyuki Yamamoto & the Claws Mail team
- * This file (C) 2004 Colin Leroy <colin@colino.net>
+ * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 1999-2007 Colin Leroy <colin@colino.net> and 
+ * the Claws Mail team
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
@@ -14,8 +14,8 @@
  * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * 
  */
 
 #ifdef HAVE_CONFIG_H
@@ -119,18 +119,29 @@ static gchar *fp_read_noconv(FILE *fp)
 static gchar *get_part_as_string(MimeInfo *mimeinfo)
 {
        gchar *textdata = NULL;
+       gchar *filename = NULL;
+       FILE *fp;
 
        g_return_val_if_fail(mimeinfo != NULL, 0);
        procmime_decode_content(mimeinfo);
+       
        if (mimeinfo->content == MIMECONTENT_MEM)
                textdata = g_strdup(mimeinfo->data.mem);
        else {
-               /* equals file_read_to_str but without conversion */
-               FILE *fp = fopen(mimeinfo->data.filename, "r");
-               if (!fp)
+               filename = procmime_get_tmp_file_name(mimeinfo);
+               if (procmime_get_part(filename, mimeinfo) < 0) {
+                       printf("error dumping file\n");
+                       return NULL;
+               }
+               fp = fopen(filename,"rb");
+               if (!fp) {
+                       printf("error reading file\n");
                        return NULL;
+               }
                textdata = fp_read_noconv(fp);
                fclose(fp);
+               g_unlink(filename);
+               g_free(filename);
        }
 
        if (!g_utf8_validate(textdata, -1, NULL)) {
@@ -222,21 +233,24 @@ static gint pgpinline_check_signature(MimeInfo *mimeinfo)
        PrivacyDataPGP *data = NULL;
        gchar *textdata = NULL, *tmp = NULL;
        gpgme_data_t plain = NULL, cipher = NULL;
-       gpgme_ctx_t ctx;
        gpgme_error_t err;
 
        g_return_val_if_fail(mimeinfo != NULL, 0);
 
-       if (procmime_mimeinfo_parent(mimeinfo) == NULL)
+       if (procmime_mimeinfo_parent(mimeinfo) == NULL) {
+               privacy_set_error(_("Incorrect part"));
                return 0; /* not parent */
-       if (mimeinfo->type != MIMETYPE_TEXT)
+       }
+       if (mimeinfo->type != MIMETYPE_TEXT) {
+               privacy_set_error(_("Not a text part"));
+               debug_print("type %d\n", mimeinfo->type);
                return 0;
-
+       }
        g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
        data = (PrivacyDataPGP *) mimeinfo->privacy;
 
        textdata = get_part_as_string(mimeinfo);
-       
+
        if (!textdata) {
                g_free(textdata);
                privacy_set_error(_("Couldn't get text data."));
@@ -263,24 +277,22 @@ static gint pgpinline_check_signature(MimeInfo *mimeinfo)
        textdata = g_strdup(tmp);
        g_free(tmp);
        
-       if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
+       if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
                debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
                privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
                return 0;
        }
-       gpgme_set_textmode(ctx, 1);
-       gpgme_set_armor(ctx, 1);
+       gpgme_set_textmode(data->ctx, 1);
+       gpgme_set_armor(data->ctx, 1);
        
-       gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
+       gpgme_data_new_from_mem(&plain, textdata, (size_t)strlen(textdata), 1);
        gpgme_data_new(&cipher);
 
-       data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
+       data->sigstatus = sgpgme_verify_signature(data->ctx, plain, NULL, cipher);
        
        gpgme_data_release(plain);
        gpgme_data_release(cipher);
        
-       gpgme_release(ctx);
-
        g_free(textdata);
        
        return 0;
@@ -356,6 +368,7 @@ static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
        }
 
        g_free(textdata);
+
        return TRUE;
 }
 
@@ -373,6 +386,9 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
        gpgme_ctx_t ctx;
        gchar *chars;
        size_t len;
+       const gchar *begin_indicator = "-----BEGIN PGP MESSAGE-----";
+       const gchar *end_indicator = "-----END PGP MESSAGE-----";
+       gchar *pos;
        
        if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
                return NULL;
@@ -398,7 +414,7 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
        }
 
        debug_print("decrypting '%s'\n", textdata);
-       gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
+       gpgme_data_new_from_mem(&cipher, textdata, (size_t)strlen(textdata), 1);
 
        plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
        if (sigstat && !sigstat->signatures)
@@ -427,20 +443,88 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
        if (src_codeset == NULL)
                src_codeset = CS_ISO_8859_1;
                
-       fprintf(dstfp, "MIME-Version: 1.0\r\n"
+       if (fprintf(dstfp, "MIME-Version: 1.0\r\n"
                        "Content-Type: text/plain; charset=%s\r\n"
                        "Content-Transfer-Encoding: 8bit\r\n"
                        "\r\n",
-                       src_codeset);
-       
-       chars = gpgme_data_release_and_get_mem(plain, &len);
-       if (len > 0)
-               fwrite(chars, len, 1, dstfp);
+                       src_codeset) < 0) {
+               FILE_OP_ERROR(fname, "fprintf");
+               privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
+               g_free(fname);
+               gpgme_data_release(plain);
+               gpgme_release(ctx);
+               return NULL;
+       }
 
-       fclose(dstfp);
+       /* Store any part before encrypted text */
+       pos = strstr(textdata, begin_indicator);
+       if (pos != NULL && (pos - textdata) > 0) {
+           if (fwrite(textdata, 1, pos - textdata, dstfp) < pos - textdata) {
+               FILE_OP_ERROR(fname, "fwrite");
+               privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
+               g_free(fname);
+               gpgme_data_release(plain);
+               gpgme_release(ctx);
+               return NULL;
+           }
+       }
        
-       gpgme_data_release(plain);
+       if (fwrite(_("\n--- Start of PGP/Inline encrypted data ---\n"), 1,
+               strlen(_("\n--- Start of PGP/Inline encrypted data ---\n")), 
+               dstfp) < strlen(_("\n--- Start of PGP/Inline encrypted data ---\n"))) {
+               FILE_OP_ERROR(fname, "fwrite");
+               privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
+               g_free(fname);
+               gpgme_data_release(plain);
+               gpgme_release(ctx);
+               return NULL;
+       }
+       chars = sgpgme_data_release_and_get_mem(plain, &len);
+       if (len > 0) {
+               if (fwrite(chars, 1, len, dstfp) < len) {
+                       FILE_OP_ERROR(fname, "fwrite");
+                       privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
+                       g_free(fname);
+                       gpgme_data_release(plain);
+                       gpgme_release(ctx);
+                       return NULL;
+               }
+       }
+       /* Store any part after encrypted text */
+       if (fwrite(_("--- End of PGP/Inline encrypted data ---\n"), 1,
+               strlen(_("--- End of PGP/Inline encrypted data ---\n")), 
+               dstfp) < strlen(_("--- End of PGP/Inline encrypted data ---\n"))) {
+                       FILE_OP_ERROR(fname, "fwrite");
+                       privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
+                       g_free(fname);
+                       gpgme_data_release(plain);
+                       gpgme_release(ctx);
+                       return NULL;
+       }
+       if (pos != NULL) {
+           pos = strstr(pos, end_indicator);
+           if (pos != NULL && *pos != '\0') {
+               pos += strlen(end_indicator);
+               if (fwrite(pos, 1, strlen(pos), dstfp) < strlen(pos)) {
+                       FILE_OP_ERROR(fname, "fwrite");
+                       privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
+                       g_free(fname);
+                       gpgme_data_release(plain);
+                       gpgme_release(ctx);
+                       return NULL;
+               }
+           }
+       }
 
+       if (fclose(dstfp) == EOF) {
+               FILE_OP_ERROR(fname, "fclose");
+               privacy_set_error(_("Couldn't close decrypted file %s"), fname);
+               g_free(fname);
+               gpgme_data_release(plain);
+               gpgme_release(ctx);
+               return NULL;
+       }
+       
        parseinfo = procmime_scan_file(fname);
        g_free(fname);
        
@@ -482,7 +566,7 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
        return decinfo;
 }
 
-static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
+static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account, const gchar *from_addr)
 {
        MimeInfo *msgcontent;
        gchar *textstr, *tmp;
@@ -519,7 +603,7 @@ static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
        
        fclose(fp);
                
-       gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
+       gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
        gpgme_data_new(&gpgsig);
        if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
                debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
@@ -529,12 +613,13 @@ static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
        gpgme_set_textmode(ctx, 1);
        gpgme_set_armor(ctx, 1);
 
-       if (!sgpgme_setup_signers(ctx, account)) {
+       if (!sgpgme_setup_signers(ctx, account, from_addr)) {
                gpgme_release(ctx);
                return FALSE;
        }
 
-       if (!getenv("GPG_AGENT_INFO")) {
+       prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
+       if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
                info.c = ctx;
                gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
        }
@@ -579,10 +664,10 @@ static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
        }
 
 
-       sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
+       sigcontent = sgpgme_data_release_and_get_mem(gpgsig, &len);
        
        if (sigcontent == NULL || len <= 0) {
-               g_warning("gpgme_data_release_and_get_mem failed");
+               g_warning("sgpgme_data_release_and_get_mem failed");
                privacy_set_error(_("Data signing failed, no contents."));
                gpgme_data_release(gpgtext);
                g_free(textstr);
@@ -601,7 +686,7 @@ static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
        if (msgcontent->content == MIMECONTENT_FILE &&
            msgcontent->data.filename != NULL) {
                if (msgcontent->tmp == TRUE)
-                       g_unlink(msgcontent->data.filename);
+                       claws_unlink(msgcontent->data.filename);
                g_free(msgcontent->data.filename);
        }
        msgcontent->data.mem = g_strdup(tmp);
@@ -622,6 +707,23 @@ static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
        return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
 }
 
+static const gchar *pgpinline_get_encrypt_warning(void)
+{
+       if (prefs_gpg_should_skip_encryption_warning(pgpinline_system.id))
+               return NULL;
+       else
+               return _("Please note that attachments are not encrypted by "
+                "the PGP/Inline system, nor are email headers, like Subject.");
+}
+
+static void pgpinline_inhibit_encrypt_warning(gboolean inhibit)
+{
+       if (inhibit)
+               prefs_gpg_add_skip_encryption_warning(pgpinline_system.id);
+       else
+               prefs_gpg_remove_skip_encryption_warning(pgpinline_system.id);
+}
+
 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 {
        MimeInfo *msgcontent;
@@ -687,7 +789,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
        fclose(fp);
 
        /* encrypt data */
-       gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
+       gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
        gpgme_data_new(&gpgenc);
        if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
                debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
@@ -698,10 +800,10 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 
        err = gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
 
-       enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
+       enccontent = sgpgme_data_release_and_get_mem(gpgenc, &len);
 
        if (enccontent == NULL || len <= 0) {
-               g_warning("gpgme_data_release_and_get_mem failed");
+               g_warning("sgpgme_data_release_and_get_mem failed");
                privacy_set_error(_("Encryption failed, %s"), gpgme_strerror(err));
                gpgme_data_release(gpgtext);
                g_free(textstr);
@@ -720,7 +822,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
        if (msgcontent->content == MIMECONTENT_FILE &&
            msgcontent->data.filename != NULL) {
                if (msgcontent->tmp == TRUE)
-                       g_unlink(msgcontent->data.filename);
+                       claws_unlink(msgcontent->data.filename);
                g_free(msgcontent->data.filename);
        }
        msgcontent->data.mem = g_strdup(tmp);
@@ -752,6 +854,8 @@ static PrivacySystem pgpinline_system = {
        TRUE,
        pgpinline_get_encrypt_data,
        pgpinline_encrypt,
+       pgpinline_get_encrypt_warning,
+       pgpinline_inhibit_encrypt_warning,
 };
 
 void pgpinline_init()