+ scheds->iv0 = iv0;
+ scheds->iv1 = iv1;
+}
+
+static void *des3_make_context(void)
+{
+ return snewn(3, DESContext);
+}
+
+static void *des3_ssh1_make_context(void)
+{
+ /* Need 3 keys for each direction, in SSH-1 */
+ return snewn(6, DESContext);
+}
+
+static void *des_make_context(void)
+{
+ return snew(DESContext);
+}
+
+static void *des_ssh1_make_context(void)
+{
+ /* Need one key for each direction, in SSH-1 */
+ return snewn(2, DESContext);
+}
+
+static void des3_free_context(void *handle) /* used for both 3DES and DES */
+{
+ sfree(handle);
+}
+
+static void des3_key(void *handle, unsigned char *key)
+{
+ DESContext *keys = (DESContext *) handle;
+ des_key_setup(GET_32BIT_MSB_FIRST(key),
+ GET_32BIT_MSB_FIRST(key + 4), &keys[0]);
+ des_key_setup(GET_32BIT_MSB_FIRST(key + 8),
+ GET_32BIT_MSB_FIRST(key + 12), &keys[1]);
+ des_key_setup(GET_32BIT_MSB_FIRST(key + 16),
+ GET_32BIT_MSB_FIRST(key + 20), &keys[2]);
+}
+
+static void des3_iv(void *handle, unsigned char *key)
+{
+ DESContext *keys = (DESContext *) handle;
+ keys[0].iv0 = GET_32BIT_MSB_FIRST(key);
+ keys[0].iv1 = GET_32BIT_MSB_FIRST(key + 4);
+}
+
+static void des_key(void *handle, unsigned char *key)
+{
+ DESContext *keys = (DESContext *) handle;
+ des_key_setup(GET_32BIT_MSB_FIRST(key),
+ GET_32BIT_MSB_FIRST(key + 4), &keys[0]);
+}
+
+static void des3_sesskey(void *handle, unsigned char *key)
+{
+ DESContext *keys = (DESContext *) handle;
+ des3_key(keys, key);
+ des3_key(keys+3, key);
+}
+
+static void des3_encrypt_blk(void *handle, unsigned char *blk, int len)
+{
+ DESContext *keys = (DESContext *) handle;
+ des_3cbc_encrypt(blk, len, keys);
+}
+
+static void des3_decrypt_blk(void *handle, unsigned char *blk, int len)
+{
+ DESContext *keys = (DESContext *) handle;
+ des_3cbc_decrypt(blk, len, keys+3);
+}
+
+static void des3_ssh2_encrypt_blk(void *handle, unsigned char *blk, int len)
+{
+ DESContext *keys = (DESContext *) handle;
+ des_cbc3_encrypt(blk, len, keys);
+}
+
+static void des3_ssh2_decrypt_blk(void *handle, unsigned char *blk, int len)
+{
+ DESContext *keys = (DESContext *) handle;
+ des_cbc3_decrypt(blk, len, keys);