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authorJeffrey Stedfast <fejj@ximian.com>2001-03-01 02:16:02 +0800
committerJeffrey Stedfast <fejj@src.gnome.org>2001-03-01 02:16:02 +0800
commit4321d72d9ba3e58e4ab05a75dc4beeb16246a392 (patch)
tree41c05185abe98030044f806820203dec34bf50b6 /camel/camel-sasl-cram-md5.c
parent27a5d50b233a2d780e6bc5866ae2daf55f3be8e9 (diff)
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Added camel-sasl*.[c,h] to the build.
2001-02-28 Jeffrey Stedfast <fejj@ximian.com> * Makefile.am: Added camel-sasl*.[c,h] to the build. * camel-sasl.[c,h]: new "abstract" SASL class * camel-sasl-kerberos4.[c,h]: new SASL class for KERBEROS_V4 * camel-sasl-cram-md5.[c,h]: new SASL class for CRAM-MD5 * camel-sasl-plain.[c,h]: new SASL class for PLAIN * providers/imap/camel-imap-auth.c: Removed the base64 functions. * camel-mime-utils.c (base64_encode_simple): Moved here from camel-imap-auth.c (base64_decode_simple): Same. svn path=/trunk/; revision=8428
Diffstat (limited to 'camel/camel-sasl-cram-md5.c')
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1 files changed, 180 insertions, 0 deletions
diff --git a/camel/camel-sasl-cram-md5.c b/camel/camel-sasl-cram-md5.c
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+/* -*- 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 the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 Street #330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include <config.h>
+#include "camel-sasl-cram-md5.h"
+#include "camel-mime-utils.h"
+#include <e-util/md5-utils.h>
+#include <stdio.h>
+#include <string.h>
+
+static CamelSaslClass *parent_class = NULL;
+
+/* Returns the class for a CamelSaslCramMd5 */
+#define CSCM_CLASS(so) CAMEL_SASL_CRAM_MD5_CLASS (CAMEL_OBJECT_GET_CLASS (so))
+
+static GByteArray *cram_md5_challenge (CamelSasl *sasl, const char *token, CamelException *ex);
+
+enum {
+ STATE_AUTH
+};
+
+struct _CamelSaslCramMd5Private {
+ int state;
+};
+
+static void
+camel_sasl_cram_md5_class_init (CamelSaslCramMd5Class *camel_sasl_cram_md5_class)
+{
+ CamelSaslClass *camel_sasl_class = CAMEL_SASL_CLASS (camel_sasl_cram_md5_class);
+
+ parent_class = CAMEL_SASL_CLASS (camel_type_get_global_classfuncs (camel_sasl_get_type ()));
+
+ /* virtual method overload */
+ camel_sasl_class->challenge = cram_md5_challenge;
+}
+
+static void
+camel_sasl_cram_md5_init (gpointer object, gpointer klass)
+{
+ CamelSaslCramMd5 *sasl_cram = CAMEL_SASL_CRAM_MD5 (object);
+
+ sasl_cram->priv = g_new0 (struct _CamelSaslCramMd5Private, 1);
+}
+
+static void
+camel_sasl_cram_md5_finalize (CamelObject *object)
+{
+ CamelSaslCramMd5 *sasl = CAMEL_SASL_CRAM_MD5 (object);
+
+ g_free (sasl->username);
+ g_free (sasl->priv);
+}
+
+
+CamelType
+camel_sasl_cram_md5_get_type (void)
+{
+ static CamelType type = CAMEL_INVALID_TYPE;
+
+ if (type == CAMEL_INVALID_TYPE) {
+ type = camel_type_register (camel_sasl_get_type (),
+ "CamelSaslCramMd5",
+ sizeof (CamelSaslCramMd5),
+ sizeof (CamelSaslCramMd5Class),
+ (CamelObjectClassInitFunc) camel_sasl_cram_md5_class_init,
+ NULL,
+ (CamelObjectInitFunc) camel_sasl_cram_md5_init,
+ (CamelObjectFinalizeFunc) camel_sasl_cram_md5_finalize);
+ }
+
+ return type;
+}
+
+CamelSasl *
+camel_sasl_cram_md5_new (const char *username, const char *passwd)
+{
+ CamelSaslCramMd5 *sasl_cram;
+
+ if (!username) return NULL;
+ if (!passwd) return NULL;
+
+ sasl_cram = CAMEL_SASL_CRAM_MD5 (camel_object_new (camel_sasl_cram_md5_get_type ()));
+ sasl_cram->username = g_strdup (username);
+ sasl_cram->passwd = g_strdup (passwd);
+
+ return CAMEL_SASL (sasl_cram);
+}
+
+/* CRAM-MD5 algorithm:
+ * MD5 ((passwd XOR opad), MD5 ((passwd XOR ipad), timestamp))
+ */
+
+static GByteArray *
+cram_md5_challenge (CamelSasl *sasl, const char *token, CamelException *ex)
+{
+ CamelSaslCramMd5 *sasl_cram = CAMEL_SASL_CRAM_MD5 (sasl);
+ struct _CamelSaslCramMd5Private *priv = sasl_cram->priv;
+ char *timestamp, *passwd, *buf, *enc;
+ guchar digest[16], md5asc[33], *s, *p;
+ GByteArray *ret = NULL;
+ guchar ipad[64];
+ guchar opad[64];
+ MD5Context ctx;
+ int i, pw_len;
+
+ switch (priv->state) {
+ case STATE_AUTH:
+ timestamp = g_strdup (token);
+ base64_decode_simple (timestamp, strlen (timestamp));
+
+ passwd = sasl_cram->passwd;
+ pw_len = strlen (sasl_cram->passwd);
+ if (pw_len > 64) {
+ md5_init (&ctx);
+ md5_update (&ctx, passwd, pw_len);
+ md5_final (&ctx, digest);
+ passwd = g_strdup (digest);
+ pw_len = 16;
+ }
+
+ memset (ipad, 0, sizeof (ipad));
+ memset (opad, 0, sizeof (opad));
+ memcpy (ipad, passwd, pw_len);
+ memcpy (opad, passwd, pw_len);
+
+ for (i = 0; i < 64; i++) {
+ ipad[i] ^= 0x36;
+ opad[i] ^= 0x5c;
+ }
+
+ md5_init (&ctx);
+ md5_update (&ctx, ipad, 64);
+ md5_update (&ctx, timestamp, strlen (timestamp));
+ md5_final (&ctx, digest);
+
+ md5_init (&ctx);
+ md5_update (&ctx, opad, 64);
+ md5_update (&ctx, digest, 16);
+ md5_final (&ctx, digest);
+
+ /* lowercase hexify that bad-boy... */
+ for (s = digest, p = md5asc; p < md5asc + 32; s++, p += 2)
+ sprintf (p, "%.2x", *s);
+
+ buf = g_strdup_printf ("%s %s", sasl_cram->username, md5asc);
+ enc = base64_encode_simple (buf, strlen (buf));
+ g_free (buf);
+
+ ret = g_byte_array_new ();
+ g_byte_array_append (ret, enc, strlen (enc));
+ g_free (enc);
+
+ break;
+ default:
+ break;
+ }
+
+ priv->state++;
+
+ return ret;
+}