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nts: support servers specified by IP address

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Certificates can include IP addresses as alternative names to enable
clients to verify such certificates without knowing the hostname.

Accept an IP address as a name in the NTS-NTP client and modify the
session code to not set the SNI in this case.
This commit is contained in:
Miroslav Lichvar 2021-01-14 16:31:07 +01:00
parent eb9e6701fd
commit 62389b7e50
2 changed files with 13 additions and 12 deletions
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4
nts_ke_session.c
View file

@ -225,9 +225,13 @@ create_tls_session(int server_mode, int sock_fd, const char *server_name,
} }
if (!server_mode) { if (!server_mode) {
assert(server_name);
if (!UTI_IsStringIP(server_name)) {
r = gnutls_server_name_set(session, GNUTLS_NAME_DNS, server_name, strlen(server_name)); r = gnutls_server_name_set(session, GNUTLS_NAME_DNS, server_name, strlen(server_name));
if (r < 0) if (r < 0)
goto error; goto error;
}
flags = 0; flags = 0;

15
nts_ntp_client.c
View file

@ -50,8 +50,11 @@
#define DUMP_IDENTIFIER "NNC0\n" #define DUMP_IDENTIFIER "NNC0\n"
struct NNC_Instance_Record { struct NNC_Instance_Record {
/* Pointer to current address of NTP server */
const IPSockAddr *ntp_address; const IPSockAddr *ntp_address;
/* Address of NTS-KE server */
IPSockAddr nts_address; IPSockAddr nts_address;
/* Hostname or IP address for certificate verification */
char *name; char *name;
NKC_Instance nke; NKC_Instance nke;
@ -119,7 +122,7 @@ NNC_CreateInstance(IPSockAddr *nts_address, const char *name, const IPSockAddr *
inst->ntp_address = ntp_address; inst->ntp_address = ntp_address;
inst->nts_address = *nts_address; inst->nts_address = *nts_address;
inst->name = !UTI_IsStringIP(name) ? Strdup(name) : NULL; inst->name = Strdup(name);
inst->siv = NULL; inst->siv = NULL;
inst->nke = NULL; inst->nke = NULL;
@ -223,12 +226,6 @@ get_cookies(NNC_Instance inst)
return 0; return 0;
} }
if (!inst->name) {
LOG(LOGS_ERR, "Missing name of %s for NTS-KE",
UTI_IPToString(&inst->nts_address.ip_addr));
return 0;
}
inst->nke = NKC_CreateInstance(&inst->nts_address, inst->name); inst->nke = NKC_CreateInstance(&inst->nts_address, inst->name);
inst->nke_attempts++; inst->nke_attempts++;
@ -541,7 +538,7 @@ save_cookies(NNC_Instance inst)
FILE *f; FILE *f;
int i; int i;
if (inst->num_cookies < 1 || !inst->name || !UTI_IsIPReal(&inst->nts_address.ip_addr)) if (inst->num_cookies < 1 || !UTI_IsIPReal(&inst->nts_address.ip_addr))
return; return;
dump_dir = CNF_GetNtsDumpDir(); dump_dir = CNF_GetNtsDumpDir();
@ -623,7 +620,7 @@ load_cookies(NNC_Instance inst)
if (!fgets(line, sizeof (line), f) || strcmp(line, DUMP_IDENTIFIER) != 0 || if (!fgets(line, sizeof (line), f) || strcmp(line, DUMP_IDENTIFIER) != 0 ||
!fgets(line, sizeof (line), f) || UTI_SplitString(line, words, MAX_WORDS) != 1 || !fgets(line, sizeof (line), f) || UTI_SplitString(line, words, MAX_WORDS) != 1 ||
!inst->name || strcmp(words[0], inst->name) != 0 || strcmp(words[0], inst->name) != 0 ||
!fgets(line, sizeof (line), f) || UTI_SplitString(line, words, MAX_WORDS) != 1 || !fgets(line, sizeof (line), f) || UTI_SplitString(line, words, MAX_WORDS) != 1 ||
sscanf(words[0], "%lf", &context_time) != 1 || sscanf(words[0], "%lf", &context_time) != 1 ||
!fgets(line, sizeof (line), f) || UTI_SplitString(line, words, MAX_WORDS) != 2 || !fgets(line, sizeof (line), f) || UTI_SplitString(line, words, MAX_WORDS) != 2 ||