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Diffstat (limited to 'resolv/ns_print.c')
-rw-r--r--resolv/ns_print.c203
1 files changed, 154 insertions, 49 deletions
diff --git a/resolv/ns_print.c b/resolv/ns_print.c
index b0b7a1046e..36d39784a5 100644
--- a/resolv/ns_print.c
+++ b/resolv/ns_print.c
@@ -1,4 +1,5 @@
/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
@@ -34,11 +35,7 @@ static const char rcsid[] = "$BINDId: ns_print.c,v 8.18 2000/02/29 05:48:12 vixi
#include <string.h>
#include <ctype.h>
-#ifdef SPRINTF_CHAR
-# define SPRINTF(x) strlen(sprintf/**/x)
-#else
-# define SPRINTF(x) ((size_t)sprintf x)
-#endif
+#define SPRINTF(x) ((size_t)sprintf x)
/* Forward. */
@@ -54,11 +51,7 @@ static int addstr(const char *src, size_t len,
static int addtab(size_t len, size_t target, int spaced,
char **buf, size_t *buflen);
-/* Proto. */
-
-#ifndef _LIBC
-u_int16_t dst_s_dns_key_id(const u_char *, const int);
-#endif
+static u_int16_t dst_s_dns_key_id(const u_char *, const int);
/* Macros. */
@@ -70,12 +63,11 @@ u_int16_t dst_s_dns_key_id(const u_char *, const int);
/* Public. */
-/*
- * int
- * ns_sprintrr(handle, rr, name_ctx, origin, buf, buflen)
+/*%
* Convert an RR to presentation format.
+ *
* return:
- * Number of characters written to buf, or -1 (check errno).
+ *\li Number of characters written to buf, or -1 (check errno).
*/
int
ns_sprintrr(const ns_msg *handle, const ns_rr *rr,
@@ -90,14 +82,13 @@ ns_sprintrr(const ns_msg *handle, const ns_rr *rr,
name_ctx, origin, buf, buflen);
return (n);
}
+libresolv_hidden_def (ns_sprintrr)
-/*
- * int
- * ns_sprintrrf(msg, msglen, name, class, type, ttl, rdata, rdlen,
- * name_ctx, origin, buf, buflen)
+/*%
* Convert the fields of an RR into presentation format.
+ *
* return:
- * Number of characters written to buf, or -1 (check errno).
+ *\li Number of characters written to buf, or -1 (check errno).
*/
int
ns_sprintrrf(const u_char *msg, size_t msglen,
@@ -122,14 +113,17 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
T(addstr("\t\t\t", 3, &buf, &buflen));
} else {
len = prune_origin(name, origin);
- if (len == 0) {
+ if (*name == '\0') {
+ goto root;
+ } else if (len == 0) {
T(addstr("@\t\t\t", 4, &buf, &buflen));
} else {
T(addstr(name, len, &buf, &buflen));
/* Origin not used or not root, and no trailing dot? */
if (((origin == NULL || origin[0] == '\0') ||
- (origin[0] != '.' && origin[1] != '\0' &&
- name[len] == '\0')) && name[len - 1] != '.') {
+ (origin[0] != '.' && origin[1] != '\0' &&
+ name[len] == '\0')) && name[len - 1] != '.') {
+ root:
T(addstr(".", 1, &buf, &buflen));
len++;
}
@@ -151,7 +145,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
*/
switch (type) {
case ns_t_a:
- if (rdlen != NS_INADDRSZ)
+ if (rdlen != (size_t)NS_INADDRSZ)
goto formerr;
(void) inet_ntop(AF_INET, rdata, buf, buflen);
addlen(strlen(buf), &buf, &buflen);
@@ -163,6 +157,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
case ns_t_mr:
case ns_t_ns:
case ns_t_ptr:
+ case ns_t_dname:
T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
break;
@@ -254,7 +249,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
case ns_t_rt: {
u_int t;
- if (rdlen < NS_INT16SZ)
+ if (rdlen < (size_t)NS_INT16SZ)
goto formerr;
/* Priority. */
@@ -272,7 +267,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
case ns_t_px: {
u_int t;
- if (rdlen < NS_INT16SZ)
+ if (rdlen < (size_t)NS_INT16SZ)
goto formerr;
/* Priority. */
@@ -310,9 +305,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
break;
case ns_t_nsap: {
- /* 2*255 for hex digits, 128 for '.' and '\0', 2 for
- 0x if inet_nsap_ntoa starts using it. */
- char t[255*2 + 128 + 2];
+ char t[2+255*3];
(void) inet_nsap_ntoa(rdlen, rdata, t);
T(addstr(t, strlen(t), &buf, &buflen));
@@ -320,7 +313,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
}
case ns_t_aaaa:
- if (rdlen != NS_IN6ADDRSZ)
+ if (rdlen != (size_t)NS_IN6ADDRSZ)
goto formerr;
(void) inet_ntop(AF_INET6, rdata, buf, buflen);
addlen(strlen(buf), &buf, &buflen);
@@ -339,7 +332,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
u_int order, preference;
char t[50];
- if (rdlen < 2*NS_INT16SZ)
+ if (rdlen < 2U*NS_INT16SZ)
goto formerr;
/* Order, Precedence. */
@@ -380,7 +373,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
u_int priority, weight, port;
char t[50];
- if (rdlen < NS_INT16SZ*3)
+ if (rdlen < 3U*NS_INT16SZ)
goto formerr;
/* Priority, Weight, Port. */
@@ -409,7 +402,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
case ns_t_wks: {
int n, lcnt;
- if (rdlen < NS_INT32SZ + 1)
+ if (rdlen < 1U + NS_INT32SZ)
goto formerr;
/* Address. */
@@ -448,13 +441,12 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
}
case ns_t_key: {
-#ifndef _LIBC
char base64_key[NS_MD5RSA_MAX_BASE64];
u_int keyflags, protocol, algorithm, key_id;
const char *leader;
int n;
- if (rdlen < NS_INT16SZ + NS_INT8SZ + NS_INT8SZ)
+ if (rdlen < 0U + NS_INT16SZ + NS_INT8SZ + NS_INT8SZ)
goto formerr;
/* Key flags, Protocol, Algorithm. */
@@ -486,20 +478,18 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
T(addstr(" )", 2, &buf, &buflen));
n = SPRINTF((tmp, " ; key_tag= %u", key_id));
T(addstr(tmp, n, &buf, &buflen));
-#endif /* !_LIBC */
break;
}
case ns_t_sig: {
-#ifndef _LIBC
char base64_key[NS_MD5RSA_MAX_BASE64];
u_int type, algorithm, labels, footprint;
const char *leader;
u_long t;
int n;
- if (rdlen < 22)
+ if (rdlen < 22U)
goto formerr;
/* Type covered, Algorithm, Label count, Original TTL. */
@@ -549,7 +539,6 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
}
if (len > 15)
T(addstr(" )", 2, &buf, &buflen));
-#endif /* !_LIBC */
break;
}
@@ -571,8 +560,10 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
case ns_t_cert: {
u_int c_type, key_tag, alg;
- int n, siz;
- char base64_cert[8192], *leader, tmp[40];
+ int n;
+ unsigned int siz;
+ char base64_cert[8192], tmp[40];
+ const char *leader;
c_type = ns_get16(rdata); rdata += NS_INT16SZ;
key_tag = ns_get16(rdata); rdata += NS_INT16SZ;
@@ -582,7 +573,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
T(addstr(tmp, len, &buf, &buflen));
siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */
if (siz > sizeof(base64_cert) * 3/4) {
- char *str = "record too long to print";
+ const char *str = "record too long to print";
T(addstr(str, strlen(str), &buf, &buflen));
}
else {
@@ -610,16 +601,47 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
break;
}
+ case ns_t_tkey: {
+ /* KJD - need to complete this */
+ u_long t;
+ int mode, err, keysize;
+
+ /* Algorithm name. */
+ T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
+ T(addstr(" ", 1, &buf, &buflen));
+
+ /* Inception. */
+ t = ns_get32(rdata); rdata += NS_INT32SZ;
+ len = SPRINTF((tmp, "%s ", p_secstodate(t)));
+ T(addstr(tmp, len, &buf, &buflen));
+
+ /* Experation. */
+ t = ns_get32(rdata); rdata += NS_INT32SZ;
+ len = SPRINTF((tmp, "%s ", p_secstodate(t)));
+ T(addstr(tmp, len, &buf, &buflen));
+
+ /* Mode , Error, Key Size. */
+ /* Priority, Weight, Port. */
+ mode = ns_get16(rdata); rdata += NS_INT16SZ;
+ err = ns_get16(rdata); rdata += NS_INT16SZ;
+ keysize = ns_get16(rdata); rdata += NS_INT16SZ;
+ len = SPRINTF((tmp, "%u %u %u ", mode, err, keysize));
+ T(addstr(tmp, len, &buf, &buflen));
+
+ /* XXX need to dump key, print otherdata length & other data */
+ break;
+ }
+
case ns_t_tsig: {
/* BEW - need to complete this */
int n;
T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen));
T(addstr(" ", 1, &buf, &buflen));
- rdata += 8; /* time */
+ rdata += 8; /*%< time */
n = ns_get16(rdata); rdata += INT16SZ;
- rdata += n; /* sig */
- n = ns_get16(rdata); rdata += INT16SZ; /* original id */
+ rdata += n; /*%< sig */
+ n = ns_get16(rdata); rdata += INT16SZ; /*%< original id */
sprintf(buf, "%d", ns_get16(rdata));
rdata += INT16SZ;
addlen(strlen(buf), &buf, &buflen);
@@ -677,7 +699,8 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
int n, m;
char *p;
- len = SPRINTF((tmp, "\\#(\t\t; %s", comment));
+ len = SPRINTF((tmp, "\\# %u%s\t; %s", (unsigned)(edata - rdata),
+ rdlen != 0U ? " (" : "", comment));
T(addstr(tmp, len, &buf, &buflen));
while (rdata < edata) {
p = tmp;
@@ -703,10 +726,11 @@ ns_sprintrrf(const u_char *msg, size_t msglen,
return (buf - obuf);
}
}
+libresolv_hidden_def (ns_sprintrrf)
/* Private. */
-/*
+/*%
* size_t
* prune_origin(name, origin)
* Find out if the name is at or under the current origin.
@@ -739,7 +763,7 @@ prune_origin(const char *name, const char *origin) {
return (name - oname);
}
-/*
+/*%
* int
* charstr(rdata, edata, buf, buflen)
* Format a <character-string> into the presentation buffer.
@@ -795,9 +819,11 @@ addname(const u_char *msg, size_t msglen,
n = dn_expand(msg, msg + msglen, *pp, *buf, *buflen);
if (n < 0)
- goto enospc; /* Guess. */
+ goto enospc; /*%< Guess. */
newlen = prune_origin(*buf, origin);
- if (newlen == 0) {
+ if (**buf == '\0') {
+ goto root;
+ } else if (newlen == 0U) {
/* Use "@" instead of name. */
if (newlen + 2 > *buflen)
goto enospc; /* No room for "@\0". */
@@ -808,6 +834,7 @@ addname(const u_char *msg, size_t msglen,
(origin[0] != '.' && origin[1] != '\0' &&
(*buf)[newlen] == '\0')) && (*buf)[newlen - 1] != '.') {
/* No trailing dot. */
+ root:
if (newlen + 2 > *buflen)
goto enospc; /* No room for ".\0". */
(*buf)[newlen++] = '.';
@@ -864,3 +891,81 @@ addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen) {
}
return (spaced);
}
+
+/* DST algorithm codes */
+#define KEY_RSA 1
+#define KEY_HMAC_MD5 157
+
+/*%
+ * calculates a checksum used in dst for an id.
+ * takes an array of bytes and a length.
+ * returns a 16 bit checksum.
+ */
+static u_int16_t
+dst_s_id_calc(const u_char *key, const int keysize)
+{
+ u_int32_t ac;
+ const u_char *kp = key;
+ int size = keysize;
+
+ if (!key || (keysize <= 0))
+ return (0xffffU);
+
+ for (ac = 0; size > 1; size -= 2, kp += 2)
+ ac += ((*kp) << 8) + *(kp + 1);
+
+ if (size > 0)
+ ac += ((*kp) << 8);
+ ac += (ac >> 16) & 0xffff;
+
+ return (ac & 0xffff);
+}
+
+/*%
+ * dst_s_get_int16
+ * This routine extracts a 16 bit integer from a two byte character
+ * string. The character string is assumed to be in network byte
+ * order and may be unaligned. The number returned is in host order.
+ * Parameter
+ * buf A two byte character string.
+ * Return
+ * The converted integer value.
+ */
+
+static u_int16_t
+dst_s_get_int16(const u_char *buf)
+{
+ register u_int16_t a = 0;
+ a = ((u_int16_t)(buf[0] << 8)) | ((u_int16_t)(buf[1]));
+ return (a);
+}
+
+/*%
+ * dst_s_dns_key_id() Function to calculate DNSSEC footprint from KEY record
+ * rdata
+ * Input:
+ * dns_key_rdata: the raw data in wire format
+ * rdata_len: the size of the input data
+ * Output:
+ * the key footprint/id calculated from the key data
+ */
+static u_int16_t
+dst_s_dns_key_id(const u_char *dns_key_rdata, const int rdata_len)
+{
+ if (!dns_key_rdata)
+ return 0;
+
+ /* compute id */
+ if (dns_key_rdata[3] == KEY_RSA) /*%< Algorithm RSA */
+ return dst_s_get_int16((const u_char *)
+ &dns_key_rdata[rdata_len - 3]);
+ else if (dns_key_rdata[3] == KEY_HMAC_MD5)
+ /* compatibility */
+ return 0;
+ else
+ /* compute a checksum on the key part of the key rr */
+ return dst_s_id_calc(dns_key_rdata, rdata_len);
+}
+
+
+/*! \file */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 23:35:45 +0000