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keys: add support for CMAC keys

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Allow a cipher (AES128 or AES256) to be specified as the type of a key
in the key file to authenticate NTP packets with a CMAC instead of the
NTPv4 (RFC 5905) MAC using a hash function. This follows RFC 8573.
This commit is contained in:
Miroslav Lichvar
2019-09-17 16:59:55 +02:00
parent e8069a0179
commit 57957ab6cf
4 changed files with 127 additions and 56 deletions
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6
cmdparse.c
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@@ -261,7 +261,7 @@ CPS_SplitWord(char *line)
/* ================================================== */
int
CPS_ParseKey(char *line, uint32_t *id, const char **hash, char **key)
CPS_ParseKey(char *line, uint32_t *id, const char **type, char **key)
{
char *s1, *s2, *s3, *s4;
@@ -278,10 +278,10 @@ CPS_ParseKey(char *line, uint32_t *id, const char **hash, char **key)
return 0;
if (*s3) {
*hash = s2;
*type = s2;
*key = s3;
} else {
*hash = "MD5";
*type = "MD5";
*key = s2;
}