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-rw-r--r--source3/libsmb/asn1.c603
1 files changed, 0 insertions, 603 deletions
diff --git a/source3/libsmb/asn1.c b/source3/libsmb/asn1.c
deleted file mode 100644
index aca1c48841..0000000000
--- a/source3/libsmb/asn1.c
+++ /dev/null
@@ -1,603 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- simple SPNEGO routines
- Copyright (C) Andrew Tridgell 2001
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-
-/* free an asn1 structure */
-void asn1_free(ASN1_DATA *data)
-{
- struct nesting *nesting = data->nesting;
-
- while (nesting) {
- struct nesting *nnext = nesting->next;
- free(nesting);
- nesting = nnext;
- };
- data->nesting = NULL;
- SAFE_FREE(data->data);
-}
-
-/* write to the ASN1 buffer, advancing the buffer pointer */
-bool asn1_write(ASN1_DATA *data, const void *p, int len)
-{
- if (data->has_error) return false;
- if (data->length < data->ofs+len) {
- data->data = SMB_REALLOC_ARRAY(data->data, unsigned char,
- data->ofs+len);
- if (!data->data) {
- data->has_error = true;
- return false;
- }
- data->length = data->ofs+len;
- }
- memcpy(data->data + data->ofs, p, len);
- data->ofs += len;
- return true;
-}
-
-/* useful fn for writing a uint8 */
-bool asn1_write_uint8(ASN1_DATA *data, uint8 v)
-{
- return asn1_write(data, &v, 1);
-}
-
-/* push a tag onto the asn1 data buffer. Used for nested structures */
-bool asn1_push_tag(ASN1_DATA *data, uint8 tag)
-{
- struct nesting *nesting;
-
- asn1_write_uint8(data, tag);
- nesting = SMB_MALLOC_P(struct nesting);
- if (!nesting) {
- data->has_error = true;
- return false;
- }
-
- nesting->start = data->ofs;
- nesting->next = data->nesting;
- data->nesting = nesting;
- return asn1_write_uint8(data, 0xff);
-}
-
-/* pop a tag */
-bool asn1_pop_tag(ASN1_DATA *data)
-{
- struct nesting *nesting;
- size_t len;
-
- if (data->has_error) {
- return false;
- }
-
- nesting = data->nesting;
-
- if (!nesting) {
- data->has_error = true;
- return false;
- }
- len = data->ofs - (nesting->start+1);
- /* yes, this is ugly. We don't know in advance how many bytes the length
- of a tag will take, so we assumed 1 byte. If we were wrong then we
- need to correct our mistake */
- if (len > 0xFFFF) {
- data->data[nesting->start] = 0x83;
- if (!asn1_write_uint8(data, 0)) return false;
- if (!asn1_write_uint8(data, 0)) return false;
- if (!asn1_write_uint8(data, 0)) return false;
- memmove(data->data+nesting->start+4, data->data+nesting->start+1, len);
- data->data[nesting->start+1] = (len>>16) & 0xFF;
- data->data[nesting->start+2] = (len>>8) & 0xFF;
- data->data[nesting->start+3] = len&0xff;
- } else if (len > 255) {
- data->data[nesting->start] = 0x82;
- if (!asn1_write_uint8(data, 0)) return false;
- if (!asn1_write_uint8(data, 0)) return false;
- memmove(data->data+nesting->start+3, data->data+nesting->start+1, len);
- data->data[nesting->start+1] = len>>8;
- data->data[nesting->start+2] = len&0xff;
- } else if (len > 127) {
- data->data[nesting->start] = 0x81;
- if (!asn1_write_uint8(data, 0)) return false;
- memmove(data->data+nesting->start+2, data->data+nesting->start+1, len);
- data->data[nesting->start+1] = len;
- } else {
- data->data[nesting->start] = len;
- }
-
- data->nesting = nesting->next;
- free(nesting);
- return true;
-}
-
-
-/* write an integer */
-bool asn1_write_Integer(ASN1_DATA *data, int i)
-{
- if (!asn1_push_tag(data, ASN1_INTEGER)) return false;
- do {
- asn1_write_uint8(data, i);
- i = i >> 8;
- } while (i);
- return asn1_pop_tag(data);
-}
-
-/* write an object ID to a ASN1 buffer */
-bool asn1_write_OID(ASN1_DATA *data, const char *OID)
-{
- unsigned v, v2;
- const char *p = (const char *)OID;
- char *newp;
-
- if (!asn1_push_tag(data, ASN1_OID))
- return false;
- v = strtol(p, &newp, 10);
- p = newp;
- v2 = strtol(p, &newp, 10);
- p = newp;
- if (!asn1_write_uint8(data, 40*v + v2))
- return false;
-
- while (*p) {
- v = strtol(p, &newp, 10);
- p = newp;
- if (v >= (1<<28)) asn1_write_uint8(data, 0x80 | ((v>>28)&0xff));
- if (v >= (1<<21)) asn1_write_uint8(data, 0x80 | ((v>>21)&0xff));
- if (v >= (1<<14)) asn1_write_uint8(data, 0x80 | ((v>>14)&0xff));
- if (v >= (1<<7)) asn1_write_uint8(data, 0x80 | ((v>>7)&0xff));
- if (!asn1_write_uint8(data, v&0x7f))
- return false;
- }
- return asn1_pop_tag(data);
-}
-
-/* write an octet string */
-bool asn1_write_OctetString(ASN1_DATA *data, const void *p, size_t length)
-{
- asn1_push_tag(data, ASN1_OCTET_STRING);
- asn1_write(data, p, length);
- asn1_pop_tag(data);
- return !data->has_error;
-}
-
-/* write a general string */
-bool asn1_write_GeneralString(ASN1_DATA *data, const char *s)
-{
- asn1_push_tag(data, ASN1_GENERAL_STRING);
- asn1_write(data, s, strlen(s));
- asn1_pop_tag(data);
- return !data->has_error;
-}
-
-/* write a BOOLEAN */
-bool asn1_write_BOOLEAN(ASN1_DATA *data, bool v)
-{
- asn1_write_uint8(data, ASN1_BOOLEAN);
- asn1_write_uint8(data, v);
- return !data->has_error;
-}
-
-/* write a BOOLEAN - hmm, I suspect this one is the correct one, and the
- above boolean is bogus. Need to check */
-bool asn1_write_BOOLEAN2(ASN1_DATA *data, bool v)
-{
- asn1_push_tag(data, ASN1_BOOLEAN);
- asn1_write_uint8(data, v);
- asn1_pop_tag(data);
- return !data->has_error;
-}
-
-/* check a BOOLEAN */
-bool asn1_check_BOOLEAN(ASN1_DATA *data, bool v)
-{
- uint8 b = 0;
-
- asn1_read_uint8(data, &b);
- if (b != ASN1_BOOLEAN) {
- data->has_error = true;
- return false;
- }
- asn1_read_uint8(data, &b);
- if (b != v) {
- data->has_error = true;
- return false;
- }
- return !data->has_error;
-}
-
-
-/* load a ASN1_DATA structure with a lump of data, ready to be parsed */
-bool asn1_load(ASN1_DATA *data, DATA_BLOB blob)
-{
- ZERO_STRUCTP(data);
- data->data = (unsigned char *)memdup(blob.data, blob.length);
- if (!data->data) {
- data->has_error = true;
- return false;
- }
- data->length = blob.length;
- return true;
-}
-
-/* read from a ASN1 buffer, advancing the buffer pointer */
-bool asn1_read(ASN1_DATA *data, void *p, int len)
-{
- if (data->has_error)
- return false;
-
- if (len < 0 || data->ofs + len < data->ofs || data->ofs + len < len) {
- data->has_error = true;
- return false;
- }
-
- if (data->ofs + len > data->length) {
- data->has_error = true;
- return false;
- }
- memcpy(p, data->data + data->ofs, len);
- data->ofs += len;
- return true;
-}
-
-/* read a uint8 from a ASN1 buffer */
-bool asn1_read_uint8(ASN1_DATA *data, uint8 *v)
-{
- return asn1_read(data, v, 1);
-}
-
-/*
- * Check thta the value of the ASN1 buffer at the current offset equals tag.
- */
-bool asn1_check_tag(ASN1_DATA *data, uint8 tag)
-{
- if (data->has_error || data->ofs >= data->length || data->ofs < 0) {
- data->has_error = true;
- return false;
- }
-
- return (tag == data->data[data->ofs]);
-}
-
-/* start reading a nested asn1 structure */
-bool asn1_start_tag(ASN1_DATA *data, uint8 tag)
-{
- uint8 b;
- struct nesting *nesting;
-
- if (!asn1_read_uint8(data, &b))
- return false;
-
- if (b != tag) {
- data->has_error = true;
- return false;
- }
- nesting = SMB_MALLOC_P(struct nesting);
- if (!nesting) {
- data->has_error = true;
- return false;
- }
-
- if (!asn1_read_uint8(data, &b)) {
- SAFE_FREE(nesting);
- return false;
- }
-
- if (b & 0x80) {
- int n = b & 0x7f;
- if (!asn1_read_uint8(data, &b)) {
- SAFE_FREE(nesting);
- return false;
- }
- nesting->taglen = b;
- while (n > 1) {
- if (!asn1_read_uint8(data, &b)) {
- SAFE_FREE(nesting);
- return false;
- }
- nesting->taglen = (nesting->taglen << 8) | b;
- n--;
- }
- } else {
- nesting->taglen = b;
- }
- nesting->start = data->ofs;
- nesting->next = data->nesting;
- data->nesting = nesting;
- return !data->has_error;
-}
-
-
-/* stop reading a tag */
-bool asn1_end_tag(ASN1_DATA *data)
-{
- struct nesting *nesting;
-
- /* make sure we read it all */
- if (asn1_tag_remaining(data) != 0) {
- data->has_error = true;
- return false;
- }
-
- nesting = data->nesting;
-
- if (!nesting) {
- data->has_error = true;
- return false;
- }
-
- data->nesting = nesting->next;
- free(nesting);
- return true;
-}
-
-/* work out how many bytes are left in this nested tag */
-int asn1_tag_remaining(ASN1_DATA *data)
-{
- if (data->has_error)
- return 0;
-
- if (!data->nesting) {
- data->has_error = true;
- return -1;
- }
- return data->nesting->taglen - (data->ofs - data->nesting->start);
-}
-
-/* read an object ID from a ASN1 buffer */
-bool asn1_read_OID(ASN1_DATA *data, char **OID)
-{
- uint8 b = 0;
- char *oid_str = NULL;
-
- *OID = NULL;
-
- if (!asn1_start_tag(data, ASN1_OID)) {
- return false;
- }
- asn1_read_uint8(data, &b);
-
- oid_str = talloc_asprintf(NULL,
- "%u",
- b/40);
- if (!oid_str) {
- data->has_error = true;
- goto out;
- }
- oid_str = talloc_asprintf_append(oid_str,
- " %u",
- b%40);
- if (!oid_str) {
- data->has_error = true;
- goto out;
- }
-
- while (asn1_tag_remaining(data) > 0) {
- unsigned v = 0;
- do {
- asn1_read_uint8(data, &b);
- v = (v<<7) | (b&0x7f);
- } while (!data->has_error && b & 0x80);
- oid_str = talloc_asprintf_append(oid_str,
- " %u",
- v);
- if (!oid_str) {
- data->has_error = true;
- goto out;
- }
- }
-
- out:
-
- asn1_end_tag(data);
-
- if (!data->has_error) {
- *OID = SMB_STRDUP(oid_str);
- }
-
- TALLOC_FREE(oid_str);
-
- return !data->has_error;
-}
-
-/* check that the next object ID is correct */
-bool asn1_check_OID(ASN1_DATA *data, const char *OID)
-{
- char *id;
-
- if (!asn1_read_OID(data, &id)) {
- return false;
- }
-
- if (strcmp(id, OID) != 0) {
- data->has_error = true;
- free(id);
- return false;
- }
- free(id);
- return true;
-}
-
-/* read a GeneralString from a ASN1 buffer */
-bool asn1_read_GeneralString(ASN1_DATA *data, char **s)
-{
- int len;
- char *str;
-
- *s = NULL;
-
- if (!asn1_start_tag(data, ASN1_GENERAL_STRING)) {
- return false;
- }
- len = asn1_tag_remaining(data);
- if (len < 0) {
- data->has_error = true;
- return false;
- }
- str = SMB_MALLOC_ARRAY(char, len+1);
- if (!str) {
- data->has_error = true;
- return false;
- }
- asn1_read(data, str, len);
- str[len] = 0;
- asn1_end_tag(data);
-
- if (!data->has_error) {
- *s = str;
- }
- return !data->has_error;
-}
-
-/* read a octet string blob */
-bool asn1_read_OctetString(ASN1_DATA *data, DATA_BLOB *blob)
-{
- int len;
- ZERO_STRUCTP(blob);
- if (!asn1_start_tag(data, ASN1_OCTET_STRING)) return false;
- len = asn1_tag_remaining(data);
- if (len < 0) {
- data->has_error = true;
- return false;
- }
- *blob = data_blob(NULL, len);
- asn1_read(data, blob->data, len);
- asn1_end_tag(data);
- return !data->has_error;
-}
-
-/* read an interger */
-bool asn1_read_Integer(ASN1_DATA *data, int *i)
-{
- uint8 b;
- *i = 0;
-
- if (!asn1_start_tag(data, ASN1_INTEGER)) return false;
- while (asn1_tag_remaining(data)>0) {
- asn1_read_uint8(data, &b);
- *i = (*i << 8) + b;
- }
- return asn1_end_tag(data);
-
-}
-
-/* check a enumarted value is correct */
-bool asn1_check_enumerated(ASN1_DATA *data, int v)
-{
- uint8 b;
- if (!asn1_start_tag(data, ASN1_ENUMERATED)) return false;
- asn1_read_uint8(data, &b);
- asn1_end_tag(data);
-
- if (v != b)
- data->has_error = false;
-
- return !data->has_error;
-}
-
-/* write an enumarted value to the stream */
-bool asn1_write_enumerated(ASN1_DATA *data, uint8 v)
-{
- if (!asn1_push_tag(data, ASN1_ENUMERATED)) return false;
- asn1_write_uint8(data, v);
- asn1_pop_tag(data);
- return !data->has_error;
-}
-
-bool ber_write_OID_String(DATA_BLOB *blob, const char *OID)
-{
- uint_t v, v2;
- const char *p = (const char *)OID;
- char *newp;
- int i;
-
- v = strtoul(p, &newp, 10);
- if (newp[0] != '.') return false;
- p = newp + 1;
-
- v2 = strtoul(p, &newp, 10);
- if (newp[0] != '.') return false;
- p = newp + 1;
-
- /*the ber representation can't use more space then the string one */
- *blob = data_blob(NULL, strlen(OID));
- if (!blob->data) return false;
-
- blob->data[0] = 40*v + v2;
-
- i = 1;
- while (*p) {
- v = strtoul(p, &newp, 10);
- if (newp[0] == '.') {
- p = newp + 1;
- } else if (newp[0] == '\0') {
- p = newp;
- } else {
- data_blob_free(blob);
- return false;
- }
- if (v >= (1<<28)) blob->data[i++] = (0x80 | ((v>>28)&0x7f));
- if (v >= (1<<21)) blob->data[i++] = (0x80 | ((v>>21)&0x7f));
- if (v >= (1<<14)) blob->data[i++] = (0x80 | ((v>>14)&0x7f));
- if (v >= (1<<7)) blob->data[i++] = (0x80 | ((v>>7)&0x7f));
- blob->data[i++] = (v&0x7f);
- }
-
- blob->length = i;
-
- return true;
-}
-
-/* read an object ID from a data blob */
-bool ber_read_OID_String(TALLOC_CTX *mem_ctx, DATA_BLOB blob, const char **OID)
-{
- int i;
- uint8_t *b;
- uint_t v;
- char *tmp_oid = NULL;
-
- if (blob.length < 2) return false;
-
- b = blob.data;
-
- tmp_oid = talloc_asprintf(mem_ctx, "%u", b[0]/40);
- if (!tmp_oid) goto nomem;
- tmp_oid = talloc_asprintf_append_buffer(tmp_oid, ".%u", b[0]%40);
- if (!tmp_oid) goto nomem;
-
- for(i = 1, v = 0; i < blob.length; i++) {
- v = (v<<7) | (b[i]&0x7f);
- if ( ! (b[i] & 0x80)) {
- tmp_oid = talloc_asprintf_append_buffer(tmp_oid, ".%u", v);
- v = 0;
- }
- if (!tmp_oid) goto nomem;
- }
-
- if (v != 0) {
- talloc_free(tmp_oid);
- return false;
- }
-
- *OID = tmp_oid;
- return true;
-
-nomem:
- return false;
-}
-
-