first pass

[PuTTY.git] / sshblowf.c

diff --git a/sshblowf.c b/sshblowf.c
index c155b25e836154d40fa58a57b990d47d58f51ab5..353116a6604fdc8334d774f4004999e934f9d321 100644 (file)
--- a/sshblowf.c
+++ b/sshblowf.c
@@ -17,6 +17,27 @@ struct BlowfishContext {
 /*
  * The Blowfish init data: hex digits of the fractional part of pi.
  * (ie pi as a hex fraction is 3.243F6A8885A308D3...)
+ *
+ * If you have Simon Tatham's 'spigot' exact real calculator
+ * available, or any other method of generating 8336 fractional hex
+ * digits of pi on standard output, you can regenerate these tables
+ * exactly as below using the following Perl script (adjusting the
+ * first line or two if your pi-generator is not spigot).
+
+open my $spig, "spigot -n -B16 -d8336 pi |";
+read $spig, $ignore, 2; # throw away the leading "3."
+for my $name ("parray", "sbox0".."sbox3") {
+    print "static const word32 ${name}[] = {\n";
+    my $len = $name eq "parray" ? 18 : 256;
+    for my $i (1..$len) {
+        read $spig, $word, 8;
+        printf "%s0x%s,", ($i%6==1 ? "    " : " "), uc $word;
+        print "\n" if ($i == $len || $i%6 == 0);
+    }
+    print "};\n\n";
+}
+close $spig;
+
  */
 static const word32 parray[] = {
     0x243F6A88, 0x85A308D3, 0x13198A2E, 0x03707344, 0xA4093822, 0x299F31D0,
@@ -620,16 +641,18 @@ const struct ssh_cipher ssh_blowfish_ssh1 = {
 
 static const struct ssh2_cipher ssh_blowfish_ssh2 = {
     blowfish_make_context, blowfish_free_context, blowfish_iv, blowfish_key,
-    blowfish_ssh2_encrypt_blk, blowfish_ssh2_decrypt_blk,
+    blowfish_ssh2_encrypt_blk, blowfish_ssh2_decrypt_blk, NULL, NULL,
     "blowfish-cbc",
-    8, 128, SSH_CIPHER_IS_CBC, "Blowfish-128 CBC"
+    8, 128, 16, SSH_CIPHER_IS_CBC, "Blowfish-128 CBC",
+    NULL
 };
 
 static const struct ssh2_cipher ssh_blowfish_ssh2_ctr = {
     blowfish_make_context, blowfish_free_context, blowfish_iv, blowfish256_key,
-    blowfish_ssh2_sdctr, blowfish_ssh2_sdctr,
+    blowfish_ssh2_sdctr, blowfish_ssh2_sdctr, NULL, NULL,
     "blowfish-ctr",
-    8, 256, 0, "Blowfish-256 SDCTR"
+    8, 256, 32, 0, "Blowfish-256 SDCTR",
+    NULL
 };
 
 static const struct ssh2_cipher *const blowfish_list[] = {