summaryrefslogtreecommitdiff
path: root/source3/libsmb/asn1.c
diff options
context:
space:
mode:
Diffstat (limited to 'source3/libsmb/asn1.c')
-rw-r--r--source3/libsmb/asn1.c139
1 files changed, 76 insertions, 63 deletions
diff --git a/source3/libsmb/asn1.c b/source3/libsmb/asn1.c
index 99c5b0b1bd..bdbe49b111 100644
--- a/source3/libsmb/asn1.c
+++ b/source3/libsmb/asn1.c
@@ -36,19 +36,19 @@ void asn1_free(ASN1_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->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->has_error = true;
+ return false;
}
data->length = data->ofs+len;
}
memcpy(data->data + data->ofs, p, len);
data->ofs += len;
- return True;
+ return true;
}
/* useful fn for writing a uint8 */
@@ -65,8 +65,8 @@ bool asn1_push_tag(ASN1_DATA *data, uint8 tag)
asn1_write_uint8(data, tag);
nesting = SMB_MALLOC_P(struct nesting);
if (!nesting) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
nesting->start = data->ofs;
@@ -82,14 +82,14 @@ bool asn1_pop_tag(ASN1_DATA *data)
size_t len;
if (data->has_error) {
- return False;
+ return false;
}
nesting = data->nesting;
if (!nesting) {
- data->has_error = True;
- return False;
+ 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
@@ -97,23 +97,23 @@ bool asn1_pop_tag(ASN1_DATA *data)
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;
+ 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;
+ 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;
+ 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 {
@@ -122,14 +122,14 @@ bool asn1_pop_tag(ASN1_DATA *data)
data->nesting = nesting->next;
free(nesting);
- return True;
+ return true;
}
/* write an integer */
bool asn1_write_Integer(ASN1_DATA *data, int i)
{
- if (!asn1_push_tag(data, ASN1_INTEGER)) return False;
+ if (!asn1_push_tag(data, ASN1_INTEGER)) return false;
do {
asn1_write_uint8(data, i);
i = i >> 8;
@@ -145,13 +145,13 @@ bool asn1_write_OID(ASN1_DATA *data, const char *OID)
char *newp;
if (!asn1_push_tag(data, ASN1_OID))
- return False;
+ 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;
+ return false;
while (*p) {
v = strtol(p, &newp, 10);
@@ -161,7 +161,7 @@ bool asn1_write_OID(ASN1_DATA *data, const char *OID)
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 false;
}
return asn1_pop_tag(data);
}
@@ -209,13 +209,13 @@ bool asn1_check_BOOLEAN(ASN1_DATA *data, bool v)
asn1_read_uint8(data, &b);
if (b != ASN1_BOOLEAN) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
asn1_read_uint8(data, &b);
if (b != v) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
return !data->has_error;
}
@@ -227,31 +227,31 @@ 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->has_error = true;
+ return false;
}
data->length = blob.length;
- return True;
+ 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;
+ return false;
if (len < 0 || data->ofs + len < data->ofs || data->ofs + len < len) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
if (data->ofs + len > data->length) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
memcpy(p, data->data + data->ofs, len);
data->ofs += len;
- return True;
+ return true;
}
/* read a uint8 from a ASN1 buffer */
@@ -260,6 +260,19 @@ 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)
{
@@ -267,34 +280,34 @@ bool asn1_start_tag(ASN1_DATA *data, uint8 tag)
struct nesting *nesting;
if (!asn1_read_uint8(data, &b))
- return False;
+ return false;
if (b != tag) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
nesting = SMB_MALLOC_P(struct nesting);
if (!nesting) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
if (!asn1_read_uint8(data, &b)) {
SAFE_FREE(nesting);
- return False;
+ return false;
}
if (b & 0x80) {
int n = b & 0x7f;
if (!asn1_read_uint8(data, &b)) {
SAFE_FREE(nesting);
- return False;
+ return false;
}
nesting->taglen = b;
while (n > 1) {
if (!asn1_read_uint8(data, &b)) {
SAFE_FREE(nesting);
- return False;
+ return false;
}
nesting->taglen = (nesting->taglen << 8) | b;
n--;
@@ -316,20 +329,20 @@ bool asn1_end_tag(ASN1_DATA *data)
/* make sure we read it all */
if (asn1_tag_remaining(data) != 0) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
nesting = data->nesting;
if (!nesting) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
data->nesting = nesting->next;
free(nesting);
- return True;
+ return true;
}
/* work out how many bytes are left in this nested tag */
@@ -339,7 +352,7 @@ int asn1_tag_remaining(ASN1_DATA *data)
return 0;
if (!data->nesting) {
- data->has_error = True;
+ data->has_error = true;
return -1;
}
return data->nesting->taglen - (data->ofs - data->nesting->start);
@@ -407,15 +420,15 @@ bool asn1_check_OID(ASN1_DATA *data, const char *OID)
char *id;
if (!asn1_read_OID(data, &id)) {
- return False;
+ return false;
}
if (strcmp(id, OID) != 0) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
free(id);
- return True;
+ return true;
}
/* read a GeneralString from a ASN1 buffer */
@@ -427,17 +440,17 @@ bool asn1_read_GeneralString(ASN1_DATA *data, char **s)
*s = NULL;
if (!asn1_start_tag(data, ASN1_GENERAL_STRING)) {
- return False;
+ return false;
}
len = asn1_tag_remaining(data);
if (len < 0) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
str = SMB_MALLOC_ARRAY(char, len+1);
if (!str) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
asn1_read(data, str, len);
str[len] = 0;
@@ -454,11 +467,11 @@ 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;
+ if (!asn1_start_tag(data, ASN1_OCTET_STRING)) return false;
len = asn1_tag_remaining(data);
if (len < 0) {
- data->has_error = True;
- return False;
+ data->has_error = true;
+ return false;
}
*blob = data_blob(NULL, len);
asn1_read(data, blob->data, len);
@@ -472,7 +485,7 @@ bool asn1_read_Integer(ASN1_DATA *data, int *i)
uint8 b;
*i = 0;
- if (!asn1_start_tag(data, ASN1_INTEGER)) return False;
+ if (!asn1_start_tag(data, ASN1_INTEGER)) return false;
while (asn1_tag_remaining(data)>0) {
asn1_read_uint8(data, &b);
*i = (*i << 8) + b;
@@ -485,12 +498,12 @@ bool asn1_read_Integer(ASN1_DATA *data, int *i)
bool asn1_check_enumerated(ASN1_DATA *data, int v)
{
uint8 b;
- if (!asn1_start_tag(data, ASN1_ENUMERATED)) return False;
+ 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;
+ data->has_error = false;
return !data->has_error;
}
@@ -498,7 +511,7 @@ bool asn1_check_enumerated(ASN1_DATA *data, int v)
/* 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;
+ if (!asn1_push_tag(data, ASN1_ENUMERATED)) return false;
asn1_write_uint8(data, v);
asn1_pop_tag(data);
return !data->has_error;
generated by cgit (git 2.34.1) at 2024-12-26 07:32:51 +0000