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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6e5714eaf7
Computers have become a lot faster since we compromised on the partial MD4 hash which we use currently for performance reasons. MD5 is a much safer choice, and is inline with both RFC1948 and other ISS generators (OpenBSD, Solaris, etc.) Furthermore, only having 24-bits of the sequence number be truly unpredictable is a very serious limitation. So the periodic regeneration and 8-bit counter have been removed. We compute and use a full 32-bit sequence number. For ipv6, DCCP was found to use a 32-bit truncated initial sequence number (it needs 43-bits) and that is fixed here as well. Reported-by: Dan Kaminsky <dan@doxpara.com> Tested-by: Willy Tarreau <w@1wt.eu> Signed-off-by: David S. Miller <davem@davemloft.net>
21 lines
807 B
C
21 lines
807 B
C
#ifndef _NET_SECURE_SEQ
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#define _NET_SECURE_SEQ
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#include <linux/types.h>
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extern __u32 secure_ip_id(__be32 daddr);
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extern __u32 secure_ipv6_id(const __be32 daddr[4]);
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extern u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
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extern u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
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__be16 dport);
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extern __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
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__be16 sport, __be16 dport);
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extern __u32 secure_tcpv6_sequence_number(__be32 *saddr, __be32 *daddr,
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__be16 sport, __be16 dport);
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extern u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
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__be16 sport, __be16 dport);
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extern u64 secure_dccpv6_sequence_number(__be32 *saddr, __be32 *daddr,
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__be16 sport, __be16 dport);
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#endif /* _NET_SECURE_SEQ */
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