all: import netsniff-ng 0.5.8-rc0 source

We decided to get rid of the old Git history and start a new one for
several reasons:

 *) Allow / enforce only high-quality commits (which was not the case
    for many commits in the history), have a policy that is more close
    to the one from the Linux kernel. With high quality commits, we
    mean code that is logically split into commits and commit messages
    that are signed-off and have a proper subject and message body.
    We do not allow automatic Github merges anymore, since they are
    total bullshit. However, we will either cherry-pick your patches
    or pull them manually.

 *) The old archive was about ~27MB for no particular good reason.
    This basically derived from the bad decision that also some PDF
    files where stored there. From this moment onwards, no binary
    objects are allowed to be stored in this repository anymore.

The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 218 insertions, 0 deletions

diff --git a/curve.h b/curve.h
new file mode 100644
index 0000000..85c6e61
--- /dev/null
+++ b/curve.h
@@ -0,0 +1,218 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2011 - 2013 Daniel Borkmann.
+ * Subject to the GPL, version 2.
+ */
+
+#ifndef CURVE_H
+#define CURVE_H
+
+#include <stdint.h>
+#include <sys/time.h>
+
+#include "locking.h"
+#include "built_in.h"
+#include "xio.h"
+#include "crypto_box_curve25519xsalsa20poly1305.h"
+
+struct tai {
+	uint64_t x;
+};
+
+struct taia {
+	struct tai sec;
+	uint32_t nano;
+	uint32_t atto;
+};
+
+static struct taia tolerance_taia = {
+	.sec.x = 0,
+	.nano = 700000000ULL,
+	.atto = 0,
+};
+
+#define crypto_box_zerobytes		crypto_box_curve25519xsalsa20poly1305_ZEROBYTES
+#define crypto_box_boxzerobytes		crypto_box_curve25519xsalsa20poly1305_BOXZEROBYTES
+
+#define crypto_box_noncebytes		crypto_box_curve25519xsalsa20poly1305_NONCEBYTES
+#define crypto_box_beforenmbytes	crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES
+
+struct curve25519_proto {
+	unsigned char enonce[crypto_box_noncebytes] __aligned_16;
+	unsigned char dnonce[crypto_box_noncebytes] __aligned_16;
+	unsigned char key[crypto_box_noncebytes] __aligned_16;
+};
+
+struct curve25519_struct {
+	unsigned char *enc_buf;
+	unsigned char *dec_buf;
+	size_t enc_buf_size;
+	size_t dec_buf_size;
+	struct spinlock enc_lock;
+	struct spinlock dec_lock;
+};
+
+extern void curve25519_selftest(void);
+extern void curve25519_alloc_or_maybe_die(struct curve25519_struct *curve);
+extern void curve25519_free(void *curve);
+extern int curve25519_pubkey_hexparse_32(unsigned char *bin, size_t blen, const char *ascii, size_t alen);
+extern int curve25519_proto_init(struct curve25519_proto *proto, unsigned char *pubkey_remote, size_t len,
+				 char *home, int server);
+extern ssize_t curve25519_encode(struct curve25519_struct *curve, struct curve25519_proto *proto,
+				 unsigned char *plaintext, size_t size, unsigned char **chipertext);
+extern ssize_t curve25519_decode(struct curve25519_struct *curve, struct curve25519_proto *proto,
+				 unsigned char *chipertext, size_t size, unsigned char **plaintext,
+				 struct taia *arrival_taia);
+
+static inline void tai_pack(unsigned char *s, struct tai *t)
+{
+	uint64_t x;
+
+	x = t->x;
+	s[7] = x & 255; x >>= 8;
+	s[6] = x & 255; x >>= 8;
+	s[5] = x & 255; x >>= 8;
+	s[4] = x & 255; x >>= 8;
+	s[3] = x & 255; x >>= 8;
+	s[2] = x & 255; x >>= 8;
+	s[1] = x & 255; x >>= 8;
+	s[0] = x;
+}
+
+static inline void tai_unpack(unsigned char *s, struct tai *t)
+{
+	uint64_t x;
+
+	x = (unsigned char) s[0];
+	x <<= 8; x += (unsigned char) s[1];
+	x <<= 8; x += (unsigned char) s[2];
+	x <<= 8; x += (unsigned char) s[3];
+	x <<= 8; x += (unsigned char) s[4];
+	x <<= 8; x += (unsigned char) s[5];
+	x <<= 8; x += (unsigned char) s[6];
+	x <<= 8; x += (unsigned char) s[7];
+	t->x = x;
+}
+
+static inline void taia_pack(unsigned char *s, struct taia *t)
+{
+	unsigned long x;
+
+	tai_pack(s, &t->sec);
+	s += 8;
+	x = t->atto;
+	s[7] = x & 255; x >>= 8;
+	s[6] = x & 255; x >>= 8;
+	s[5] = x & 255; x >>= 8;
+	s[4] = x;
+	x = t->nano;
+	s[3] = x & 255; x >>= 8;
+	s[2] = x & 255; x >>= 8;
+	s[1] = x & 255; x >>= 8;
+	s[0] = x;
+} 
+
+static inline void taia_unpack(unsigned char *s, struct taia *t)
+{
+	unsigned long x;
+
+	tai_unpack(s, &t->sec);
+	s += 8;
+	x = (unsigned char) s[4];
+	x <<= 8; x += (unsigned char) s[5];
+	x <<= 8; x += (unsigned char) s[6];
+	x <<= 8; x += (unsigned char) s[7];
+	t->atto = x;
+	x = (unsigned char) s[0];
+	x <<= 8; x += (unsigned char) s[1];
+	x <<= 8; x += (unsigned char) s[2];
+	x <<= 8; x += (unsigned char) s[3];
+	t->nano = x;
+}
+
+#define tai_unix(t, u) ((void) ((t)->x = 4611686018427387914ULL + (uint64_t) (u)))
+
+static inline void taia_now(struct taia *t)
+{
+	struct timeval now;
+
+	gettimeofday(&now, NULL);
+
+	tai_unix(&t->sec, now.tv_sec);
+	t->nano = 1000 * now.tv_usec + 500;
+	t->atto = secrand();
+}
+
+static inline void taia_sub(struct taia *res, const struct taia *u, const struct taia *v)
+{
+	unsigned long unano = u->nano;
+	unsigned long uatto = u->atto;
+
+	res->sec.x = u->sec.x - v->sec.x;
+	res->nano = unano - v->nano;
+	res->atto = uatto - v->atto;
+
+	if (res->atto > uatto) {
+		res->atto += 1000000000UL;
+		--res->nano;
+	}
+
+	if (res->nano > unano) {
+		res->nano += 1000000000UL;
+		--res->sec.x;
+	}
+}
+
+static inline void taia_add(struct taia *res, const struct taia *u, const struct taia *v)
+{
+	res->sec.x = u->sec.x + v->sec.x;
+	res->nano = u->nano + v->nano;
+	res->atto = u->atto + v->atto;
+
+	if (res->atto > 999999999UL) {
+		res->atto -= 1000000000UL;
+		++res->nano;
+	}
+
+	if (res->nano > 999999999UL) {
+		res->nano -= 1000000000UL;
+		++res->sec.x;
+	}
+}
+
+static inline int taia_less(const struct taia *t, const struct taia *u)
+{
+	if (t->sec.x < u->sec.x)
+		return 1;
+	if (t->sec.x > u->sec.x)
+		return 0;
+	if (t->nano < u->nano)
+		return 1;
+	if (t->nano > u->nano)
+		return 0;
+	return t->atto < u->atto;
+}
+
+static inline int is_good_taia(struct taia *arrival_taia, struct taia *packet_taia)
+{
+	int is_ts_good = 0;
+	struct taia sub_res;
+
+	if (taia_less(arrival_taia, packet_taia)) {
+		taia_sub(&sub_res, packet_taia, arrival_taia);
+		if (taia_less(&sub_res, &tolerance_taia))
+			is_ts_good = 1;
+		else
+			is_ts_good = 0;
+	} else {
+		taia_sub(&sub_res, arrival_taia, packet_taia);
+		if (taia_less(&sub_res, &tolerance_taia))
+			is_ts_good = 1;
+		else
+			is_ts_good = 0;
+	}
+
+	return is_ts_good;
+}
+
+#endif /* CURVE_H */