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Add support for different authentication hashes

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Allow different hash functions to be used in the NTP and cmdmon
protocols. This breaks the cmdmon protocol compatibility. Extended key
file format is used to specify the hash functions for chronyd and new
authhash command is added to chronyc. MD5 is the default and the only
function included in the chrony source code, other functions will be
available from libraries.
This commit is contained in:
Miroslav Lichvar
2011-10-19 13:26:03 +02:00
parent 6015f99d98
commit 777303f130
20 changed files with 473 additions and 329 deletions
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8
ntp.h
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@@ -33,6 +33,8 @@
#include <inttypes.h>
#endif
#include "hash.h"
typedef struct {
uint32_t hi;
uint32_t lo;
@@ -40,7 +42,7 @@ typedef struct {
typedef uint32_t NTP_int32;
#define AUTH_DATA_LEN 16
#define MAX_NTP_AUTH_DATA_LEN MAX_HASH_LENGTH
/* Type definition for leap bits */
typedef enum {
@@ -72,7 +74,7 @@ typedef struct {
NTP_int64 receive_ts;
NTP_int64 transmit_ts;
NTP_int32 auth_keyid;
uint8_t auth_data[AUTH_DATA_LEN];
uint8_t auth_data[MAX_NTP_AUTH_DATA_LEN];
} NTP_Packet;
/* We have to declare a buffer type to hold a datagram read from the
@@ -89,7 +91,7 @@ typedef union {
uint8_t arbitrary[MAX_NTP_MESSAGE_SIZE];
} ReceiveBuffer;
#define NTP_NORMAL_PACKET_SIZE (sizeof(NTP_Packet) - (sizeof(NTP_int32) + AUTH_DATA_LEN))
#define NTP_NORMAL_PACKET_SIZE offsetof(NTP_Packet, auth_keyid)
/* ================================================== */