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authorWilliam Allen Simpson <william.allen.simpson@gmail.com>2009-12-02 21:12:09 +0300
committerDavid S. Miller <davem@davemloft.net>2009-12-03 09:07:23 +0300
commitda5c78c82629a167794436e4306b4cf1faddea90 (patch)
treec933fdc0583b592c01885890ebf770840555d28b /include/linux/cryptohash.h
parente6b4d11367519bc71729c09d05a126b133c755be (diff)
downloadlinux-da5c78c82629a167794436e4306b4cf1faddea90.tar.xz
TCPCT part 1b: generate Responder Cookie secret
Define (missing) hash message size for SHA1. Define hashing size constants specific to TCP cookies. Add new function: tcp_cookie_generator(). Maintain global secret values for tcp_cookie_generator(). This is a significantly revised implementation of earlier (15-year-old) Photuris [RFC-2522] code for the KA9Q cooperative multitasking platform. Linux RCU technique appears to be well-suited to this application, though neither of the circular queue items are freed. These functions will also be used in subsequent patches that implement additional features. Signed-off-by: William.Allen.Simpson@gmail.com Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/cryptohash.h')
-rw-r--r--include/linux/cryptohash.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cryptohash.h b/include/linux/cryptohash.h
index c118b2ad9807..ec78a4bbe1d5 100644
--- a/include/linux/cryptohash.h
+++ b/include/linux/cryptohash.h
@@ -2,6 +2,7 @@
#define __CRYPTOHASH_H
#define SHA_DIGEST_WORDS 5
+#define SHA_MESSAGE_BYTES (512 /*bits*/ / 8)
#define SHA_WORKSPACE_WORDS 80
void sha_init(__u32 *buf);