Use GLib's implementation of Base64 instead of our own.
[claws.git] / src / plugins / pgpinline / pgpinline.c
index e5ba0004bcbf256158bb9667b3c845f8d21bde67..f6144b5d276f178f92a6451c090713e3390ba7ce 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2007 Colin Leroy <colin@colino.net> and 
+ * Copyright (C) 1999-2014 Colin Leroy <colin@colino.net> and
  * the Claws Mail team
  *
  * This program is free software; you can redistribute it and/or modify
@@ -20,6 +20,7 @@
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
+#include "claws-features.h"
 #endif
 
 #ifdef USE_GPGME
@@ -37,8 +38,8 @@
 #include <plugins/pgpcore/sgpgme.h>
 #include <plugins/pgpcore/prefs_gpg.h>
 #include <plugins/pgpcore/passphrase.h>
+#include <plugins/pgpcore/pgp_utils.h>
 #include "quoted-printable.h"
-#include "base64.h"
 #include "codeconv.h"
 #include "plugin.h"
 
@@ -85,97 +86,13 @@ static void pgpinline_free_privacydata(PrivacyData *_data)
        g_free(data);
 }
 
-static gchar *fp_read_noconv(FILE *fp)
-{
-       GByteArray *array;
-       guchar buf[BUFSIZ];
-       gint n_read;
-       gchar *result = NULL;
-
-       if (!fp)
-               return NULL;
-       array = g_byte_array_new();
-
-       while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
-               if (n_read < sizeof(buf) && ferror(fp))
-                       break;
-               g_byte_array_append(array, buf, n_read);
-       }
-
-       if (ferror(fp)) {
-               FILE_OP_ERROR("file stream", "fread");
-               g_byte_array_free(array, TRUE);
-               return NULL;
-       }
-
-       buf[0] = '\0';
-       g_byte_array_append(array, buf, 1);
-       result = (gchar *)array->data;
-       g_byte_array_free(array, FALSE);
-       
-       return result;
-}
-
-static gchar *get_part_as_string(MimeInfo *mimeinfo)
-{
-       gchar *textdata = NULL;
-       gchar *real_data = NULL;
-       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)
-                       return NULL;
-               textdata = fp_read_noconv(fp);
-               fclose(fp);
-       }
-
-       if (!g_utf8_validate(textdata, -1, NULL)) {
-               gchar *tmp = NULL;
-               codeconv_set_strict(TRUE);
-               if (procmime_mimeinfo_get_parameter(mimeinfo, "charset")) {
-                       tmp = conv_codeset_strdup(textdata,
-                               procmime_mimeinfo_get_parameter(mimeinfo, "charset"),
-                               CS_UTF_8);
-               }
-               if (!tmp) {
-                       tmp = conv_codeset_strdup(textdata,
-                               conv_get_locale_charset_str_no_utf8(), 
-                               CS_UTF_8);
-               }
-               codeconv_set_strict(FALSE);
-               if (!tmp) {
-                       tmp = conv_codeset_strdup(textdata,
-                               conv_get_locale_charset_str_no_utf8(), 
-                               CS_UTF_8);
-               }
-               if (tmp) {
-                       g_free(textdata);
-                       textdata = tmp;
-               }
-       }
-       if (textdata && mimeinfo->offset && 
-           mimeinfo->offset+ mimeinfo->length <= strlen(textdata)) {
-               real_data = g_strdup(textdata + mimeinfo->offset);
-               real_data[mimeinfo->length] = '\0';
-               g_free(textdata);
-               textdata = real_data;
-       } else if (textdata && mimeinfo->offset) {
-               debug_print("got data shorter than what it should be\n");
-       }
-       return textdata;        
-}
-
 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
 {
        PrivacyDataPGP *data = NULL;
        const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
        gchar *textdata, *sigpos;
        
-       g_return_val_if_fail(mimeinfo != NULL, FALSE);
+       cm_return_val_if_fail(mimeinfo != NULL, FALSE);
        
        if (procmime_mimeinfo_parent(mimeinfo) == NULL)
                return FALSE; /* not parent */
@@ -219,8 +136,10 @@ static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
                data = pgpinline_new_privacydata();
                mimeinfo->privacy = (PrivacyData *) data;
        }
-       data->done_sigtest = TRUE;
-       data->is_signed = TRUE;
+       if (data != NULL) {
+               data->done_sigtest = TRUE;
+               data->is_signed = TRUE;
+       }
 
        return TRUE;
 }
@@ -232,18 +151,22 @@ static gint pgpinline_check_signature(MimeInfo *mimeinfo)
        gpgme_data_t plain = NULL, cipher = NULL;
        gpgme_error_t err;
 
-       g_return_val_if_fail(mimeinfo != NULL, 0);
+       cm_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);
+       }
+       cm_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."));
@@ -273,6 +196,7 @@ static gint pgpinline_check_signature(MimeInfo *mimeinfo)
        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));
+               g_free(textdata);
                return 0;
        }
        gpgme_set_textmode(data->ctx, 1);
@@ -294,12 +218,8 @@ static gint pgpinline_check_signature(MimeInfo *mimeinfo)
 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
 {
        PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
-       
-       g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
 
-       if (data->sigstatus == NULL && 
-           prefs_gpg_get_config()->auto_check_signatures)
-               pgpinline_check_signature(mimeinfo);
+       cm_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
 
        return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
 }
@@ -307,13 +227,9 @@ static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
 {
        PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
-       
-       g_return_val_if_fail(data != NULL, g_strdup("Error"));
 
-       if (data->sigstatus == NULL && 
-           prefs_gpg_get_config()->auto_check_signatures)
-               pgpinline_check_signature(mimeinfo);
-       
+       cm_return_val_if_fail(data != NULL, g_strdup("Error"));
+
        return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
 }
 
@@ -321,19 +237,18 @@ static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
 {
        PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
        
-       g_return_val_if_fail(data != NULL, g_strdup("Error"));
+       cm_return_val_if_fail(data != NULL, g_strdup("Error"));
 
        return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
 }
 
-
-
 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
 {
-       const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
+       const gchar *begin_indicator = "-----BEGIN PGP MESSAGE-----";
+       const gchar *end_indicator = "-----END PGP MESSAGE-----";
        gchar *textdata;
        
-       g_return_val_if_fail(mimeinfo != NULL, FALSE);
+       cm_return_val_if_fail(mimeinfo != NULL, FALSE);
        
        if (procmime_mimeinfo_parent(mimeinfo) == NULL)
                return FALSE; /* not parent */
@@ -350,12 +265,16 @@ static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
                g_free(mimeinfo->subtype);
                mimeinfo->subtype = g_strdup("plain");
        }
-       
+
        textdata = get_part_as_string(mimeinfo);
        if (!textdata)
                return FALSE;
-       
-       if (!strstr(textdata, enc_indicator)) {
+
+       if (!pgp_locate_armor_header(textdata, begin_indicator)) {
+               g_free(textdata);
+               return FALSE;
+       }
+       if (!pgp_locate_armor_header(textdata, end_indicator)) {
                g_free(textdata);
                return FALSE;
        }
@@ -389,8 +308,8 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
        gpgme_set_textmode(ctx, 1);
        gpgme_set_armor(ctx, 1);
 
-       g_return_val_if_fail(mimeinfo != NULL, NULL);
-       g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
+       cm_return_val_if_fail(mimeinfo != NULL, NULL);
+       cm_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
        
        if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
            mimeinfo->type != MIMETYPE_TEXT) {
@@ -443,22 +362,16 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
                        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;
+               goto FILE_ERROR;
        }
 
        /* Store any part before encrypted text */
-       pos = strstr(textdata, begin_indicator);
+       pos = pgp_locate_armor_header(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;
+               goto FILE_ERROR;
            }
        }
        
@@ -467,44 +380,34 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
                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;
+               goto FILE_ERROR;
        }
        chars = sgpgme_data_release_and_get_mem(plain, &len);
        if (len > 0) {
                if (fwrite(chars, 1, len, dstfp) < len) {
                        FILE_OP_ERROR(fname, "fwrite");
+                       g_free(chars);
                        privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
-                       g_free(fname);
-                       gpgme_data_release(plain);
-                       gpgme_release(ctx);
-                       return NULL;
+                       goto FILE_ERROR;
                }
        }
+       g_free(chars);
        /* 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;
+                       goto FILE_ERROR;
        }
        if (pos != NULL) {
-           pos = strstr(pos, end_indicator);
+           pos = pgp_locate_armor_header(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;
+                       goto FILE_ERROR;
                }
            }
        }
@@ -547,19 +450,28 @@ static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
                        data = pgpinline_new_privacydata();
                        decinfo->privacy = (PrivacyData *) data;        
                }
-               data->done_sigtest = TRUE;
-               data->is_signed = TRUE;
-               data->sigstatus = sigstat;
-               if (data->ctx)
-                       gpgme_release(data->ctx);
-               data->ctx = ctx;
+               if (data != NULL) {
+                       data->done_sigtest = TRUE;
+                       data->is_signed = TRUE;
+                       data->sigstatus = sigstat;
+                       if (data->ctx)
+                               gpgme_release(data->ctx);
+                       data->ctx = ctx;
+               }
        } else
                gpgme_release(ctx);
 
        return decinfo;
+
+FILE_ERROR:
+       fclose(dstfp);
+       g_free(fname);
+       gpgme_data_release(plain);
+       gpgme_release(ctx);
+       return NULL;
 }
 
-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;
@@ -576,9 +488,14 @@ static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
 
        /* get content node from message */
        msgcontent = (MimeInfo *) mimeinfo->node->children->data;
-       if (msgcontent->type == MIMETYPE_MULTIPART)
+       if (msgcontent->type == MIMETYPE_MULTIPART) {
+               if (!msgcontent->node->children) {
+                       debug_print("msgcontent->node->children NULL, bailing\n");
+                       privacy_set_error(_("Malformed message"));
+                       return FALSE;
+               }
                msgcontent = (MimeInfo *) msgcontent->node->children->data;
-
+       }
        /* get rid of quoted-printable or anything */
        procmime_decode_content(msgcontent);
 
@@ -606,7 +523,7 @@ 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;
        }
@@ -679,7 +596,7 @@ 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);
@@ -740,6 +657,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
        if ((err = gpgme_new(&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));
+               g_free(kset);
                return FALSE;
        }
        i = 0;
@@ -749,6 +667,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
                if (err) {
                        debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
                        privacy_set_error(_("Couldn't add GPG key %s, %s"), fprs[i], gpgme_strerror(err));
+                       g_free(kset);
                        return FALSE;
                }
                debug_print("found %s at %d\n", fprs[i], i);
@@ -761,9 +680,15 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 
        /* get content node from message */
        msgcontent = (MimeInfo *) mimeinfo->node->children->data;
-       if (msgcontent->type == MIMETYPE_MULTIPART)
+       if (msgcontent->type == MIMETYPE_MULTIPART) {
+               if (!msgcontent->node->children) {
+                       debug_print("msgcontent->node->children NULL, bailing\n");
+                       privacy_set_error(_("Malformed message"));
+                       g_free(kset);
+                       return FALSE;
+               }
                msgcontent = (MimeInfo *) msgcontent->node->children->data;
-
+       }
        /* get rid of quoted-printable or anything */
        procmime_decode_content(msgcontent);
 
@@ -771,6 +696,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
        if (fp == NULL) {
                privacy_set_error(_("Couldn't create temporary file, %s"), strerror(errno));
                perror("my_tmpfile");
+               g_free(kset);
                return FALSE;
        }
        procmime_write_mimeinfo(msgcontent, fp);
@@ -787,6 +713,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
        if ((err = gpgme_new(&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));
+               g_free(kset);
                return FALSE;
        }
        gpgme_set_armor(ctx, 1);
@@ -794,6 +721,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
        err = gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
 
        enccontent = sgpgme_data_release_and_get_mem(gpgenc, &len);
+       g_free(kset);
 
        if (enccontent == NULL || len <= 0) {
                g_warning("sgpgme_data_release_and_get_mem failed");
@@ -801,6 +729,7 @@ static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
                gpgme_data_release(gpgtext);
                g_free(textstr);
                gpgme_release(ctx);
+               g_free(enccontent);
                return FALSE;
        }
 
@@ -815,7 +744,7 @@ 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);
@@ -849,6 +778,7 @@ static PrivacySystem pgpinline_system = {
        pgpinline_encrypt,
        pgpinline_get_encrypt_warning,
        pgpinline_inhibit_encrypt_warning,
+       prefs_gpg_auto_check_signatures,
 };
 
 void pgpinline_init()