X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/b89053c0750e42d88ff92e3efc3d546f18a6d435..b3ebaa287b8a57f3d35675889adc86f6384eb458:/sshdes.c

diff --git a/sshdes.c b/sshdes.c
index ce4bdfe3..4b22c71b 100644
--- a/sshdes.c
+++ b/sshdes.c
@@ -897,10 +897,9 @@ void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
     memset(ourkeys, 0, sizeof(ourkeys));
 }
 
-void des_encrypt_xdmauth(unsigned char *keydata, unsigned char *blk, int len)
+static void des_keysetup_xdmauth(unsigned char *keydata, DESContext *dc)
 {
     unsigned char key[8];
-    DESContext dc;
     int i, nbits, j;
     unsigned int bits;
 
@@ -918,11 +917,23 @@ void des_encrypt_xdmauth(unsigned char *keydata, unsigned char *blk, int len)
 	nbits -= 7;
     }
 
-    des_key_setup(GET_32BIT_MSB_FIRST(key), GET_32BIT_MSB_FIRST(key + 4),
-		  &dc);
+    des_key_setup(GET_32BIT_MSB_FIRST(key), GET_32BIT_MSB_FIRST(key + 4), dc);
+}
+
+void des_encrypt_xdmauth(unsigned char *keydata, unsigned char *blk, int len)
+{
+    DESContext dc;
+    des_keysetup_xdmauth(keydata, &dc);
     des_cbc_encrypt(blk, blk, 24, &dc);
 }
 
+void des_decrypt_xdmauth(unsigned char *keydata, unsigned char *blk, int len)
+{
+    DESContext dc;
+    des_keysetup_xdmauth(keydata, &dc);
+    des_cbc_decrypt(blk, blk, 24, &dc);
+}
+
 static const struct ssh2_cipher ssh_3des_ssh2 = {
     des3_make_context, des3_free_context, des3_iv, des3_key,
     des3_ssh2_encrypt_blk, des3_ssh2_decrypt_blk,