RSA key authentication in ssh1 works; SSH2 is nearly there

[u/mdw/putty] / sshdes.c

diff --git a/sshdes.c b/sshdes.c
index 1c82193..bc1fe59 100644 (file)
--- a/sshdes.c
+++ b/sshdes.c
@@ -1,4 +1,5 @@
 #include <assert.h>
+#include <stdio.h> /* FIXME */
 #include <stdarg.h> /* FIXME */
 #include <windows.h> /* FIXME */
 #include "putty.h" /* FIXME */
@@ -769,6 +770,18 @@ static void des3_ssh2_decrypt_blk(unsigned char *blk, int len) {
     des_cbc3_decrypt(blk, blk, len, sckeys);
 }
 
+void des3_decrypt_pubkey(unsigned char *key,
+                         unsigned char *blk, int len) {
+    DESContext ourkeys[3];
+    des_key_setup(GET_32BIT_MSB_FIRST(key),
+                  GET_32BIT_MSB_FIRST(key+4), &ourkeys[0]);
+    des_key_setup(GET_32BIT_MSB_FIRST(key+8),
+                  GET_32BIT_MSB_FIRST(key+12), &ourkeys[1]);
+    des_key_setup(GET_32BIT_MSB_FIRST(key),
+                  GET_32BIT_MSB_FIRST(key+4), &ourkeys[2]);
+    des_3cbc_decrypt(blk, blk, len, ourkeys);
+}
+
 struct ssh_cipher ssh_3des_ssh2 = {
     NULL,
     des3_csiv, des3_cskey,