Move folders into right places

1 files changed, 1000 insertions, 0 deletions

diff --git a/bsnmp/asn1.c b/bsnmp/asn1.c
new file mode 100644
index 0000000..8a206ee
--- /dev/null
+++ b/bsnmp/asn1.c
@@ -0,0 +1,1000 @@
+/*
+ * Copyright (c) 2001-2003
+ *	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
+ *	All rights reserved.
+ *
+ * Author: Harti Brandt <harti@freebsd.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Begemot: bsnmp/lib/asn1.c,v 1.28 2004/08/06 08:46:49 brandt Exp $
+ *
+ * ASN.1 for SNMP.
+ */
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdint.h>
+#include <assert.h>
+#include "asn1.h"
+
+static void asn_error_func(const struct asn_buf *, const char *, ...);
+
+void (*asn_error)(const struct asn_buf *, const char *, ...) = asn_error_func;
+
+/*
+ * Read the next header. This reads the tag (note, that only single
+ * byte tags are supported for now) and the length field. The length field
+ * is restricted to a 32-bit value.
+ * All errors of this function stop the decoding.
+ */
+enum asn_err
+asn_get_header(struct asn_buf *b, u_char *type, asn_len_t *len)
+{
+	u_int length;
+
+	if (b->asn_len == 0) {
+		asn_error(b, "no identifier for header");
+		return (ASN_ERR_EOBUF);
+	}
+	*type = *b->asn_cptr;
+	if ((*type & ASN_TYPE_MASK) > 0x30) {
+		asn_error(b, "types > 0x30 not supported (%u)",
+		    *type & ASN_TYPE_MASK);
+		return (ASN_ERR_FAILED);
+	}
+	b->asn_cptr++;
+	b->asn_len--;
+	if (b->asn_len == 0) {
+		asn_error(b, "no length field");
+		return (ASN_ERR_EOBUF);
+	}
+	if (*b->asn_cptr & 0x80) {
+		length = *b->asn_cptr++ & 0x7f;
+		b->asn_len--;
+		if (length == 0) {
+			asn_error(b, "indefinite length not supported");
+			return (ASN_ERR_FAILED);
+		}
+		if (length > ASN_MAXLENLEN) {
+			asn_error(b, "long length too long (%u)", length);
+			return (ASN_ERR_FAILED);
+		}
+		if (length > b->asn_len) {
+			asn_error(b, "long length truncated");
+			return (ASN_ERR_EOBUF);
+		}
+		*len = 0;
+		while (length--) {
+			*len = (*len << 8) | *b->asn_cptr++;
+			b->asn_len--;
+		}
+	} else {
+		*len = *b->asn_cptr++;
+		b->asn_len--;
+	}
+	return (ASN_ERR_OK);
+}
+
+/*
+ * Write a length field (restricted to values < 2^32-1) and return the
+ * number of bytes this field takes. If ptr is NULL, the length is computed
+ * but nothing is written. If the length would be too large return 0.
+ */
+static u_int
+asn_put_len(u_char *ptr, asn_len_t len)
+{
+	u_int lenlen, lenlen1;
+	asn_len_t tmp;
+
+	if (len > ASN_MAXLEN) {
+		asn_error(NULL, "encoding length too long: (%u)", len);
+		return (0);
+	}
+
+	if (len <= 127) {
+		if (ptr)
+			*ptr++ = (u_char)len;
+		return (1);
+	} else {
+		lenlen = 0;
+		/* compute number of bytes for value (is at least 1) */
+		for (tmp = len; tmp != 0; tmp >>= 8)
+			lenlen++;
+		if (ptr != NULL) {
+			*ptr++ = (u_char)lenlen | 0x80;
+			lenlen1 = lenlen;
+			while (lenlen1-- > 0) {
+				ptr[lenlen1] = len & 0xff;
+				len >>= 8;
+			}
+		}
+		return (lenlen + 1);
+	}
+}
+
+/*
+ * Write a header (tag and length fields).
+ * Tags are restricted to one byte tags (value <= 0x30) and the
+ * lenght field to 16-bit. All errors stop the encoding.
+ */
+enum asn_err
+asn_put_header(struct asn_buf *b, u_char type, asn_len_t len)
+{
+	u_int lenlen;
+
+	/* tag field */
+	if ((type & ASN_TYPE_MASK) > 0x30) {
+		asn_error(NULL, "types > 0x30 not supported (%u)",
+		    type & ASN_TYPE_MASK);
+		return (ASN_ERR_FAILED);
+	}
+	if (b->asn_len == 0)
+		return (ASN_ERR_EOBUF);
+
+	*b->asn_ptr++ = type;
+	b->asn_len--;
+
+	/* length field */
+	if ((lenlen = asn_put_len(NULL, len)) == 0)
+		return (ASN_ERR_FAILED);
+	if (b->asn_len < lenlen)
+		return (ASN_ERR_EOBUF);
+
+	(void)asn_put_len(b->asn_ptr, len);
+	b->asn_ptr += lenlen;
+	b->asn_len -= lenlen;
+	return (ASN_ERR_OK);
+}
+
+
+/*
+ * This constructs a temporary sequence header with space for the maximum
+ * length field (three byte). Set the pointer that ptr points to to the
+ * start of the encoded header. This is used for a later call to
+ * asn_commit_header which will fix-up the length field and move the
+ * value if needed. All errors should stop the encoding.
+ */
+#define	TEMP_LEN (1 + ASN_MAXLENLEN + 1)
+enum asn_err
+asn_put_temp_header(struct asn_buf *b, u_char type, u_char **ptr)
+{
+	int ret;
+
+	if (b->asn_len < TEMP_LEN)
+		return (ASN_ERR_EOBUF);
+	*ptr = b->asn_ptr;
+	if ((ret = asn_put_header(b, type, ASN_MAXLEN)) == ASN_ERR_OK)
+		assert(b->asn_ptr == *ptr + TEMP_LEN);
+	return (ret);
+}
+enum asn_err
+asn_commit_header(struct asn_buf *b, u_char *ptr)
+{
+	asn_len_t len;
+	u_int lenlen, shift;
+
+	/* compute length of encoded value without header */
+	len = b->asn_ptr - (ptr + TEMP_LEN);
+
+	/* insert length. may not fail. */
+	lenlen = asn_put_len(ptr + 1, len);
+	if (lenlen > TEMP_LEN - 1)
+		return (ASN_ERR_FAILED);
+
+	if (lenlen < TEMP_LEN - 1) {
+		/* shift value down */
+		shift = (TEMP_LEN - 1) - lenlen;
+		memmove(ptr + 1 + lenlen, ptr + TEMP_LEN, len);
+		b->asn_ptr -= shift;
+		b->asn_len += shift;
+	}
+	return (ASN_ERR_OK);
+}
+#undef TEMP_LEN
+
+/*
+ * BER integer. This may be used to get a signed 64 bit integer at maximum.
+ * The maximum length should be checked by the caller. This cannot overflow
+ * if the caller ensures that len is at maximum 8.
+ *
+ * <bytes>
+ */
+static enum asn_err
+asn_get_real_integer(struct asn_buf *b, asn_len_t len, int64_t *vp)
+{
+	uint64_t val;
+	int neg = 0;
+	enum asn_err err;
+
+	if (b->asn_len < len) {
+		asn_error(b, "truncated integer");
+		return (ASN_ERR_EOBUF);
+	}
+	if (len == 0) {
+		asn_error(b, "zero-length integer");
+		*vp = 0;
+		return (ASN_ERR_BADLEN);
+	}
+	err = ASN_ERR_OK;
+	if (len > 8)
+		err = ASN_ERR_RANGE;
+	else if (len > 1 &&
+	    ((*b->asn_cptr == 0x00 && (b->asn_cptr[1] & 0x80) == 0) ||
+	    (*b->asn_cptr == 0xff && (b->asn_cptr[1] & 0x80) == 0x80))) {
+		asn_error(b, "non-minimal integer");
+		err = ASN_ERR_BADLEN;
+	}
+
+	if (*b->asn_cptr & 0x80)
+		neg = 1;
+	val = 0;
+	while (len--) {
+		val <<= 8;
+		val |= neg ? (u_char)~*b->asn_cptr : *b->asn_cptr;
+		b->asn_len--;
+		b->asn_cptr++;
+	}
+	if (neg) {
+		*vp = -(int64_t)val - 1;
+	} else
+		*vp = (int64_t)val;
+	return (err);
+}
+
+/*
+ * Write a signed integer with the given type. The caller has to ensure
+ * that the actual value is ok for this type.
+ */
+static enum asn_err
+asn_put_real_integer(struct asn_buf *b, u_char type, int64_t ival)
+{
+	int i, neg = 0;
+# define OCTETS 8
+	u_char buf[OCTETS];
+	uint64_t val;
+	enum asn_err ret;
+
+	if (ival < 0) {
+		/* this may fail if |INT64_MIN| > |INT64_MAX| and
+		 * the value is between * INT64_MIN <= ival < -(INT64_MAX+1) */
+		val = (uint64_t)-(ival + 1);
+		neg = 1;
+	} else
+		val = (uint64_t)ival;
+
+	/* split the value into octets */
+	for (i = OCTETS - 1; i >= 0; i--) {
+		buf[i] = val & 0xff;
+		if (neg)
+			buf[i] = ~buf[i];
+		val >>= 8;
+	}
+	/* no leading 9 zeroes or ones */
+	for (i = 0; i < OCTETS - 1; i++)
+		if (!((buf[i] == 0xff && (buf[i + 1] & 0x80) != 0) ||
+		    (buf[i] == 0x00 && (buf[i + 1] & 0x80) == 0)))
+			break;
+	if ((ret = asn_put_header(b, type, OCTETS - i)))
+		return (ret);
+	if (OCTETS - (u_int)i > b->asn_len)
+		return (ASN_ERR_EOBUF);
+
+	while (i < OCTETS) {
+		*b->asn_ptr++ = buf[i++];
+		b->asn_len--;
+	}
+	return (ASN_ERR_OK);
+# undef OCTETS
+}
+
+
+/*
+ * The same for unsigned 64-bitters. Here we have the problem, that overflow
+ * can happen, because the value maybe 9 bytes long. In this case the
+ * first byte must be 0.
+ */
+static enum asn_err
+asn_get_real_unsigned(struct asn_buf *b, asn_len_t len, uint64_t *vp)
+{
+	enum asn_err err;
+
+	if (b->asn_len < len) {
+		asn_error(b, "truncated integer");
+		return (ASN_ERR_EOBUF);
+	}
+	if (len == 0) {
+		asn_error(b, "zero-length integer");
+		*vp = 0;
+		return (ASN_ERR_BADLEN);
+	}
+	err = ASN_ERR_OK;
+	*vp = 0;
+	if ((*b->asn_cptr & 0x80) || (len == 9 && *b->asn_cptr != 0)) {
+		/* negative integer or too larger */
+		*vp = 0xffffffffffffffffULL;
+		err = ASN_ERR_RANGE;
+	} else if (len > 1 &&
+	    *b->asn_cptr == 0x00 && (b->asn_cptr[1] & 0x80) == 0) {
+		asn_error(b, "non-minimal unsigned");
+		err = ASN_ERR_BADLEN;
+	}
+
+	while (len--) {
+		*vp = (*vp << 8) | *b->asn_cptr++;
+		b->asn_len--;
+	}
+	return (err);
+}
+
+
+/*
+ * Values with the msb on need 9 octets.
+ */
+static int
+asn_put_real_unsigned(struct asn_buf *b, u_char type, uint64_t val)
+{
+	int i;
+# define OCTETS 9
+	u_char buf[OCTETS];
+	enum asn_err ret;
+
+	/* split the value into octets */
+	for (i = OCTETS - 1; i >= 0; i--) {
+		buf[i] = val & 0xff;
+		val >>= 8;
+	}
+	/* no leading 9 zeroes */
+	for (i = 0; i < OCTETS - 1; i++)
+		if (!(buf[i] == 0x00 && (buf[i + 1] & 0x80) == 0))
+			break;
+	if ((ret = asn_put_header(b, type, OCTETS - i)))
+		return (ret);
+	if (OCTETS - (u_int)i > b->asn_len)
+		return (ASN_ERR_EOBUF);
+
+	while (i < OCTETS) {
+		*b->asn_ptr++ = buf[i++];
+		b->asn_len--;
+	}
+#undef OCTETS
+	return (ASN_ERR_OK);
+}
+
+/*
+ * The ASN.1 INTEGER type is restricted to 32-bit signed by the SMI.
+ */
+enum asn_err
+asn_get_integer_raw(struct asn_buf *b, asn_len_t len, int32_t *vp)
+{
+	int64_t val;
+	enum asn_err ret;
+
+	if ((ret = asn_get_real_integer(b, len, &val)) == ASN_ERR_OK) {
+		if (len > 4)
+			ret = ASN_ERR_BADLEN;
+		else if (val > INT32_MAX || val < INT32_MIN)
+			/* may not happen */
+			ret = ASN_ERR_RANGE;
+		*vp = (int32_t)val;
+	}
+	return (ret);
+}
+
+enum asn_err
+asn_get_integer(struct asn_buf *b, int32_t *vp)
+{
+	asn_len_t len;
+	u_char type;
+	enum asn_err err;
+
+	if ((err = asn_get_header(b, &type, &len)) != ASN_ERR_OK)
+		return (err);
+	if (type != ASN_TYPE_INTEGER) {
+		asn_error(b, "bad type for integer (%u)", type);
+		return (ASN_ERR_TAG);
+	}
+
+	return (asn_get_integer_raw(b, len, vp));
+}
+
+enum asn_err
+asn_put_integer(struct asn_buf *b, int32_t val)
+{
+	return (asn_put_real_integer(b, ASN_TYPE_INTEGER, val));
+}
+
+/*
+ * OCTETSTRING
+ *
+ * <0x04> <len> <data ...>
+ *
+ * Get an octetstring. noctets must point to the buffer size and on
+ * return will contain the size of the octetstring, regardless of the
+ * buffer size.
+ */
+enum asn_err
+asn_get_octetstring_raw(struct asn_buf *b, asn_len_t len, u_char *octets,
+    u_int *noctets)
+{
+	enum asn_err err = ASN_ERR_OK;
+
+	if (*noctets < len) {
+		asn_error(b, "octetstring truncated");
+		err = ASN_ERR_RANGE;
+	}
+	if (b->asn_len < len) {
+		asn_error(b, "truncatet octetstring");
+		return (ASN_ERR_EOBUF);
+	}
+	if (*noctets < len)
+		memcpy(octets, b->asn_cptr, *noctets);
+	else
+		memcpy(octets, b->asn_cptr, len);
+	*noctets = len;
+	b->asn_cptr += len;
+	b->asn_len -= len;
+	return (err);
+}
+
+enum asn_err
+asn_get_octetstring(struct asn_buf *b, u_char *octets, u_int *noctets)
+{
+	enum asn_err err;
+	u_char type;
+	asn_len_t len;
+
+	if ((err = asn_get_header(b, &type, &len)) != ASN_ERR_OK)
+		return (err);
+	if (type != ASN_TYPE_OCTETSTRING) {
+		asn_error(b, "bad type for octetstring (%u)", type);
+		return (ASN_ERR_TAG);
+	}
+	return (asn_get_octetstring_raw(b, len, octets, noctets));
+}
+
+enum asn_err
+asn_put_octetstring(struct asn_buf *b, const u_char *octets, u_int noctets)
+{
+	enum asn_err ret;
+
+	if ((ret = asn_put_header(b, ASN_TYPE_OCTETSTRING, noctets)) != ASN_ERR_OK)
+		return (ret);
+	if (b->asn_len < noctets)
+		return (ASN_ERR_EOBUF);
+
+	memcpy(b->asn_ptr, octets, noctets);
+	b->asn_ptr += noctets;
+	b->asn_len -= noctets;
+	return (ASN_ERR_OK);
+}
+
+/*
+ * NULL
+ *
+ * <0x05> <0x00>
+ */
+enum asn_err
+asn_get_null_raw(struct asn_buf *b, asn_len_t len)
+{
+	if (len != 0) {
+		if (b->asn_len < len) {
+			asn_error(b, "truncated NULL");
+			return (ASN_ERR_EOBUF);
+		}
+		asn_error(b, "bad length for NULL (%u)", len);
+		b->asn_len -= len;
+		b->asn_ptr += len;
+		return (ASN_ERR_BADLEN);
+	}
+	return (ASN_ERR_OK);
+}
+
+enum asn_err
+asn_get_null(struct asn_buf *b)
+{
+	u_char type;
+	asn_len_t len;
+	enum asn_err err;
+
+	if ((err = asn_get_header(b, &type, &len)) != ASN_ERR_OK)
+		return (err);
+	if (type != ASN_TYPE_NULL) {
+		asn_error(b, "bad type for NULL (%u)", type);
+		return (ASN_ERR_TAG);
+	}
+	return (asn_get_null_raw(b, len));
+}
+
+enum asn_err
+asn_put_null(struct asn_buf *b)
+{
+	return (asn_put_header(b, ASN_TYPE_NULL, 0));
+}
+
+enum asn_err
+asn_put_exception(struct asn_buf *b, u_int except)
+{
+	return (asn_put_header(b, ASN_CLASS_CONTEXT | except, 0));
+}
+
+/*
+ * OBJID
+ *
+ * <0x06> <len> <subid...>
+ */
+enum asn_err
+asn_get_objid_raw(struct asn_buf *b, asn_len_t len, struct asn_oid *oid)
+{
+	asn_subid_t subid;
+	enum asn_err err;
+
+	if (b->asn_len < len) {
+		asn_error(b, "truncated OBJID");
+		return (ASN_ERR_EOBUF);
+	}
+	oid->len = 0;
+	if (len == 0) {
+		asn_error(b, "short OBJID");
+		oid->subs[oid->len++] = 0;
+		oid->subs[oid->len++] = 0;
+		return (ASN_ERR_BADLEN);
+	}
+	err = ASN_ERR_OK;
+	while (len != 0) {
+		if (oid->len == ASN_MAXOIDLEN) {
+			asn_error(b, "OID too long (%u)", oid->len);
+			b->asn_cptr += len;
+			b->asn_len -= len;
+			return (ASN_ERR_BADLEN);
+		}
+		subid = 0;
+		do {
+			if (len == 0) {
+				asn_error(b, "unterminated subid");
+				return (ASN_ERR_EOBUF);
+			}
+			if (subid > (ASN_MAXID >> 7)) {
+				asn_error(b, "OBID subid too larger");
+				err = ASN_ERR_RANGE;
+			}
+			subid = (subid << 7) | (*b->asn_cptr & 0x7f);
+			len--;
+			b->asn_len--;
+		} while (*b->asn_cptr++ & 0x80);
+		if (oid->len == 0) {
+			if (subid < 80) {
+				oid->subs[oid->len++] = subid / 40;
+				oid->subs[oid->len++] = subid % 40;
+			} else {
+				oid->subs[oid->len++] = 2;
+				oid->subs[oid->len++] = subid - 80;
+			}
+		} else {
+			oid->subs[oid->len++] = subid;
+		}
+	}
+	return (err);
+
+}
+
+enum asn_err
+asn_get_objid(struct asn_buf *b, struct asn_oid *oid)
+{
+	u_char type;
+	asn_len_t len;
+	enum asn_err err;
+
+	if ((err = asn_get_header(b, &type, &len)) != ASN_ERR_OK)
+		return (err);
+	if (type != ASN_TYPE_OBJID) {
+		asn_error(b, "bad type for OBJID (%u)", type);
+		return (ASN_ERR_TAG);
+	}
+	return (asn_get_objid_raw(b, len, oid));
+}
+
+enum asn_err
+asn_put_objid(struct asn_buf *b, const struct asn_oid *oid)
+{
+	asn_subid_t first, sub;
+	enum asn_err err, err1;
+	u_int i, oidlen;
+	asn_len_t len;
+
+	err = ASN_ERR_OK;
+	if (oid->len == 0) {
+		/* illegal */
+		asn_error(NULL, "short oid");
+		err = ASN_ERR_RANGE;
+		first = 0;
+		oidlen = 2;
+	} else if (oid->len == 1) {
+		/* illegal */
+		asn_error(b, "short oid");
+		if (oid->subs[0] > 2)
+			asn_error(NULL, "oid[0] too large (%u)", oid->subs[0]);
+		err = ASN_ERR_RANGE;
+		first = oid->subs[0] * 40;
+		oidlen = 2;
+	} else {
+		if (oid->len > ASN_MAXOIDLEN) {
+			asn_error(NULL, "oid too long %u", oid->len);
+			err = ASN_ERR_RANGE;
+		}
+		if (oid->subs[0] > 2 ||
+		    (oid->subs[0] < 2 && oid->subs[0] >= 40)) {
+			asn_error(NULL, "oid out of range (%u,%u)",
+			    oid->subs[0], oid->subs[1]);
+			err = ASN_ERR_RANGE;
+		}
+		first = 40 * oid->subs[0] + oid->subs[1];
+		oidlen = oid->len;
+	}
+	len = 0;
+	for (i = 1; i < oidlen; i++) {
+		sub = (i == 1) ? first : oid->subs[i];
+		if (sub > ASN_MAXID) {
+			asn_error(NULL, "oid subid too large");
+			err = ASN_ERR_RANGE;
+		}
+		len += (sub <= 0x7f) ? 1
+		    : (sub <= 0x3fff) ? 2
+		    : (sub <= 0x1fffff) ? 3
+		    : (sub <= 0xfffffff) ? 4
+		    : 5;
+	}
+	if ((err1 = asn_put_header(b, ASN_TYPE_OBJID, len)) != ASN_ERR_OK)
+		return (err1);
+	if (b->asn_len < len)
+		return (ASN_ERR_EOBUF);
+
+	for (i = 1; i < oidlen; i++) {
+		sub = (i == 1) ? first : oid->subs[i];
+		if (sub <= 0x7f) {
+			*b->asn_ptr++ = sub;
+			b->asn_len--;
+		} else if (sub <= 0x3fff) {
+			*b->asn_ptr++ = (sub >> 7) | 0x80;
+			*b->asn_ptr++ = sub & 0x7f;
+			b->asn_len -= 2;
+		} else if (sub <= 0x1fffff) {
+			*b->asn_ptr++ = (sub >> 14) | 0x80;
+			*b->asn_ptr++ = ((sub >> 7) & 0x7f) | 0x80;
+			*b->asn_ptr++ = sub & 0x7f;
+			b->asn_len -= 3;
+		} else if (sub <= 0xfffffff) {
+			*b->asn_ptr++ = (sub >> 21) | 0x80;
+			*b->asn_ptr++ = ((sub >> 14) & 0x7f) | 0x80;
+			*b->asn_ptr++ = ((sub >> 7) & 0x7f) | 0x80;
+			*b->asn_ptr++ = sub & 0x7f;
+			b->asn_len -= 4;
+		} else {
+			*b->asn_ptr++ = (sub >> 28) | 0x80;
+			*b->asn_ptr++ = ((sub >> 21) & 0x7f) | 0x80;
+			*b->asn_ptr++ = ((sub >> 14) & 0x7f) | 0x80;
+			*b->asn_ptr++ = ((sub >> 7) & 0x7f) | 0x80;
+			*b->asn_ptr++ = sub & 0x7f;
+			b->asn_len -= 5;
+		}
+	}
+	return (err);
+}
+/*
+ * SEQUENCE header
+ *
+ * <0x10|0x20> <len> <data...>
+ */
+enum asn_err
+asn_get_sequence(struct asn_buf *b, asn_len_t *len)
+{
+	u_char type;
+	enum asn_err err;
+
+	if ((err = asn_get_header(b, &type, len)) != ASN_ERR_OK)
+		return (err);
+	if (type != (ASN_TYPE_SEQUENCE|ASN_TYPE_CONSTRUCTED)) {
+		asn_error(b, "bad sequence type %u", type);
+		return (ASN_ERR_TAG);
+	}
+	if (*len > b->asn_len) {
+		asn_error(b, "truncated sequence");
+		return (ASN_ERR_EOBUF);
+	}
+	return (ASN_ERR_OK);
+}
+
+/*
+ * Application types
+ *
+ * 0x40 4 MSB 2MSB 2LSB LSB
+ */
+enum asn_err
+asn_get_ipaddress_raw(struct asn_buf *b, asn_len_t len, u_char *addr)
+{
+	u_int i;
+
+	if (b->asn_len < len) {
+		asn_error(b, "truncated ip-address");
+		return (ASN_ERR_EOBUF);
+	}
+	if (len < 4) {
+		asn_error(b, "short length for ip-Address %u", len);
+		for (i = 0; i < len; i++)
+			*addr++ = *b->asn_cptr++;
+		while (i++ < len)
+			*addr++ = 0;
+		b->asn_len -= len;
+		return (ASN_ERR_BADLEN);
+	}
+	for (i = 0; i < 4; i++)
+		*addr++ = *b->asn_cptr++;
+	b->asn_cptr += len - 4;
+	b->asn_len -= len;
+	return (ASN_ERR_OK);
+}
+
+enum asn_err
+asn_get_ipaddress(struct asn_buf *b, u_char *addr)
+{
+	u_char type;
+	asn_len_t len;
+	enum asn_err err;
+
+	if ((err = asn_get_header(b, &type, &len)) != ASN_ERR_OK)
+		return (err);
+	if (type != (ASN_CLASS_APPLICATION|ASN_APP_IPADDRESS)) {
+		asn_error(b, "bad type for ip-address %u", type);
+		return (ASN_ERR_TAG);
+	}
+	return (asn_get_ipaddress_raw(b, len, addr));
+}
+
+enum asn_err
+asn_put_ipaddress(struct asn_buf *b, const u_char *addr)
+{
+	enum asn_err err;
+
+	if ((err = asn_put_header(b, ASN_CLASS_APPLICATION|ASN_APP_IPADDRESS,
+	    4)) != ASN_ERR_OK)
+		return (err);
+	if (b->asn_len < 4)
+		return (ASN_ERR_EOBUF);
+
+	memcpy(b->asn_ptr, addr, 4);
+	b->asn_ptr += 4;
+	b->asn_len -= 4;
+	return (ASN_ERR_OK);
+}
+
+
+/*
+ * UNSIGNED32
+ *
+ * 0x42|0x41 <len> ...
+ */
+enum asn_err
+asn_get_uint32_raw(struct asn_buf *b, asn_len_t len, uint32_t *vp)
+{
+	uint64_t v;
+	enum asn_err err;
+
+	if ((err = asn_get_real_unsigned(b, len, &v)) == ASN_ERR_OK) {
+		if (len > 5) {
+			asn_error(b, "uint32 too long %u", len);
+			err = ASN_ERR_BADLEN;
+		} else if (v > UINT32_MAX) {
+			asn_error(b, "uint32 too large %llu", v);
+			err = ASN_ERR_RANGE;
+		}
+		*vp = (uint32_t)v;
+	}
+	return (err);
+}
+
+enum asn_err
+asn_put_uint32(struct asn_buf *b, u_char type, uint32_t val)
+{
+	uint64_t v = val;
+
+	return (asn_put_real_unsigned(b, ASN_CLASS_APPLICATION|type, v));
+}
+
+/*
+ * COUNTER64
+ * 0x46 <len> ...
+ */
+enum asn_err
+asn_get_counter64_raw(struct asn_buf *b, asn_len_t len, uint64_t *vp)
+{
+	return (asn_get_real_unsigned(b, len, vp));
+}
+
+enum asn_err
+asn_put_counter64(struct asn_buf *b, uint64_t val)
+{
+	return (asn_put_real_unsigned(b,
+	    ASN_CLASS_APPLICATION | ASN_APP_COUNTER64, val));
+}
+
+/*
+ * TimeTicks
+ * 0x43 <len> ...
+ */
+enum asn_err
+asn_get_timeticks(struct asn_buf *b, uint32_t *vp)
+{
+	asn_len_t len;
+	u_char type;
+	enum asn_err err;
+
+	if ((err = asn_get_header(b, &type, &len)) != ASN_ERR_OK)
+		return (err);
+	if (type != (ASN_CLASS_APPLICATION|ASN_APP_TIMETICKS)) {
+		asn_error(b, "bad type for timeticks %u", type);
+		return (ASN_ERR_TAG);
+	}
+	return (asn_get_uint32_raw(b, len, vp));
+}
+
+enum asn_err
+asn_put_timeticks(struct asn_buf *b, uint32_t val)
+{
+	uint64_t v = val;
+
+	return (asn_put_real_unsigned(b,
+	    ASN_CLASS_APPLICATION | ASN_APP_TIMETICKS, v));
+}
+
+/*
+ * Construct a new OID by taking a range of sub ids of the original oid.
+ */
+void
+asn_slice_oid(struct asn_oid *dest, const struct asn_oid *src,
+    u_int from, u_int to)
+{
+	if (from >= to) {
+		dest->len = 0;
+		return;
+	}
+	dest->len = to - from;
+	memcpy(dest->subs, &src->subs[from], dest->len * sizeof(dest->subs[0]));
+}
+
+/*
+ * Append from to to
+ */
+void
+asn_append_oid(struct asn_oid *to, const struct asn_oid *from)
+{
+	memcpy(&to->subs[to->len], &from->subs[0],
+	    from->len * sizeof(from->subs[0]));
+	to->len += from->len;
+}
+
+/*
+ * Skip a value
+ */
+enum asn_err
+asn_skip(struct asn_buf *b, asn_len_t len)
+{
+	if (b->asn_len < len)
+		return (ASN_ERR_EOBUF);
+	b->asn_cptr += len;
+	b->asn_len -= len;
+	return (ASN_ERR_OK);
+}
+
+/*
+ * Compare two OIDs.
+ *
+ * o1 < o2 : -1
+ * o1 > o2 : +1
+ * o1 = o2 :  0
+ */
+int
+asn_compare_oid(const struct asn_oid *o1, const struct asn_oid *o2)
+{
+	u_long i;
+
+	for (i = 0; i < o1->len && i < o2->len; i++) {
+		if (o1->subs[i] < o2->subs[i])
+			return (-1);
+		if (o1->subs[i] > o2->subs[i])
+			return (+1);
+	}
+	if (o1->len < o2->len)
+		return (-1);
+	if (o1->len > o2->len)
+		return (+1);
+	return (0);
+}
+
+/*
+ * Check whether an OID is a sub-string of another OID.
+ */
+int
+asn_is_suboid(const struct asn_oid *o1, const struct asn_oid *o2)
+{
+	u_long i;
+
+	for (i = 0; i < o1->len; i++)
+		if (i >= o2->len || o1->subs[i] != o2->subs[i])
+			return (0);
+	return (1);
+}
+
+/*
+ * Put a string representation of an oid into a user buffer. This buffer
+ * is assumed to be at least ASN_OIDSTRLEN characters long.
+ *
+ * sprintf is assumed not to fail here.
+ */
+char *
+asn_oid2str_r(const struct asn_oid *oid, char *buf)
+{
+	u_int len, i;
+	char *ptr;
+
+	if ((len = oid->len) > ASN_MAXOIDLEN)
+		len = ASN_MAXOIDLEN;
+	buf[0] = '\0';
+	for (i = 0, ptr = buf; i < len; i++) {
+		if (i > 0)
+			*ptr++ = '.';
+		ptr += sprintf(ptr, "%u", oid->subs[i]);
+	}
+	return (buf);
+}
+
+/*
+ * Make a string from an OID in a private buffer.
+ */
+char *
+asn_oid2str(const struct asn_oid *oid)
+{
+	static char str[ASN_OIDSTRLEN];
+
+	return (asn_oid2str_r(oid, str));
+}
+
+
+static void
+asn_error_func(const struct asn_buf *b, const char *err, ...)
+{
+	va_list ap;
+	u_long i;
+
+	fprintf(stderr, "ASN.1: ");
+	va_start(ap, err);
+	vfprintf(stderr, err, ap);
+	va_end(ap);
+
+	if (b != NULL) {
+		fprintf(stderr, " at");
+		for (i = 0; b->asn_len > i; i++)
+			fprintf(stderr, " %02x", b->asn_cptr[i]);
+	}
+	fprintf(stderr, "\n");
+}