[patch] remove deadcode

[Erik Hovland]

This patch removes an #if 0 set of code. And it removes a passphrase
check which cannot happen.

E

-- 
Erik Hovland
mail: erik AT hovland DOT org
web: http://hovland.org/
PGP/GPG public key available on request

# 
# old_revision [4c32ad8064e93b83c6d635d193b34d5f9112d1ae]
# 
# patch "keyimport.c"
#  from [4d6aa56819151b18d6828b1a9b1db0b9864e40b3]
#    to [4052ebe94ea2b063028c4cd9f437cbd5180a9e54]
# 
============================================================
--- keyimport.c 4d6aa56819151b18d6828b1a9b1db0b9864e40b3
+++ keyimport.c 4052ebe94ea2b063028c4cd9f437cbd5180a9e54
@@ -926,40 +926,6 @@
        if (passphrase) {
                fprintf(stderr, "Encrypted keys aren't supported currently\n");
                goto error;
-#if 0
-               /*
-                * Invent an iv. Then derive encryption key from passphrase
-                * and iv/salt:
-                * 
-                *  - let block A equal MD5(passphrase || iv)
-                *  - let block B equal MD5(A || passphrase || iv)
-                *  - block C would be MD5(B || passphrase || iv) and so on
-                *  - encryption key is the first N bytes of A || B
-                */
-               struct MD5Context md5c;
-               unsigned char keybuf[32];
-
-               for (i = 0; i < 8; i++) iv[i] = random_byte();
-
-               MD5Init(&md5c);
-               MD5Update(&md5c, (unsigned char *)passphrase, 
strlen(passphrase));
-               MD5Update(&md5c, iv, 8);
-               MD5Final(keybuf, &md5c);
-
-               MD5Init(&md5c);
-               MD5Update(&md5c, keybuf, 16);
-               MD5Update(&md5c, (unsigned char *)passphrase, 
strlen(passphrase));
-               MD5Update(&md5c, iv, 8);
-               MD5Final(keybuf+16, &md5c);
-
-               /*
-                * Now encrypt the key blob.
-                */
-               des3_encrypt_pubkey_ossh(keybuf, iv, outblob, outlen);
-
-               memset(&md5c, 0, sizeof(md5c));
-               memset(keybuf, 0, sizeof(keybuf));
-#endif
        }
 
        /*
@@ -976,12 +942,6 @@
                goto error;
        }
        fputs(header, fp);
-       if (passphrase) {
-               fprintf(fp, "Proc-Type: 4,ENCRYPTED\nDEK-Info: DES-EDE3-CBC,");
-               for (i = 0; i < 8; i++)
-                       fprintf(fp, "%02X", iv[i]);
-               fprintf(fp, "\n\n");
-       }
        base64_encode_fp(fp, outblob, outlen, 64);
        fputs(footer, fp);
        fclose(fp);