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authorSimo Sorce <idra@samba.org>2006-12-20 15:51:02 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 14:29:31 -0500
commit52455cb9224bc7358f6700c8e3a233ff8c9a0f2a (patch)
tree64f4796f8a9dbbdcc860c1461d1953d19c349c9b /source4/libcli/util
parent4973fbe7732e93a9be989bbafc24b1e3d848ed08 (diff)
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r20284: Simplify OID primitive BER parsing.
Do not require an artificial ASN.1 context to be setup. Simo. (This used to be commit 14b3b9861ae47498c74a6643e6979b3d85260a61)
Diffstat (limited to 'source4/libcli/util')
-rw-r--r--source4/libcli/util/asn1.c146
1 files changed, 83 insertions, 63 deletions
diff --git a/source4/libcli/util/asn1.c b/source4/libcli/util/asn1.c
index c82269fd60..d139996bd0 100644
--- a/source4/libcli/util/asn1.c
+++ b/source4/libcli/util/asn1.c
@@ -187,27 +187,28 @@ BOOL asn1_write_Integer(struct asn1_data *data, int i)
return asn1_pop_tag(data);
}
-BOOL asn1_write_OID_String(struct asn1_data *data, const char *OID)
+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] != '.') {
- data->has_error = True;
- return False;
- }
+ if (newp[0] != '.') return False;
p = newp + 1;
+
v2 = strtoul(p, &newp, 10);
- if (newp[0] != '.') {
- data->has_error = True;
- return False;
- }
+ if (newp[0] != '.') return False;
p = newp + 1;
- if (!asn1_write_uint8(data, 40*v + v2))
- return False;
+ /*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] == '.') {
@@ -215,25 +216,38 @@ BOOL asn1_write_OID_String(struct asn1_data *data, const char *OID)
} else if (newp[0] == '\0') {
p = newp;
} else {
- data->has_error = True;
+ data_blob_free(blob);
return False;
}
- 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;
+ 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);
}
- return !data->has_error;
+ blob->length = i;
+
+ return True;
}
/* write an object ID to a ASN1 buffer */
BOOL asn1_write_OID(struct asn1_data *data, const char *OID)
{
+ DATA_BLOB blob;
+
if (!asn1_push_tag(data, ASN1_OID)) return False;
- if (!asn1_write_OID_String(data, OID)) return False;
+
+ if (!ber_write_OID_String(&blob, OID)) {
+ data->has_error = True;
+ return False;
+ }
+
+ if (!asn1_write(data, blob.data, blob.length)) {
+ data->has_error = True;
+ return False;
+ }
+ data_blob_free(&blob);
return asn1_pop_tag(data);
}
@@ -425,26 +439,6 @@ BOOL asn1_start_tag(struct asn1_data *data, uint8_t tag)
return !data->has_error;
}
-BOOL asn1_start_fake_tag(struct asn1_data *data)
-{
- struct nesting *nesting;
-
- nesting = talloc(NULL, struct nesting);
- if (!nesting) {
- data->has_error = True;
- return False;
- }
-
- nesting->start = data->ofs;
- nesting->taglen = data->length - data->ofs;
- nesting->next = data->nesting;
- data->nesting = nesting;
- if (asn1_tag_remaining(data) == -1) {
- return False;
- }
- return !data->has_error;
-}
-
/* stop reading a tag */
BOOL asn1_end_tag(struct asn1_data *data)
{
@@ -488,52 +482,78 @@ int asn1_tag_remaining(struct asn1_data *data)
return remaining;
}
-/* read an object ID from a ASN1 buffer */
-BOOL asn1_read_OID_String(struct asn1_data *data, const char **OID)
+/* read an object ID from a data blob */
+BOOL ber_read_OID_String(DATA_BLOB blob, const char **OID)
{
- uint8_t b;
+ int i;
+ uint8_t *b;
+ uint_t v;
char *tmp_oid = NULL;
- if (!asn1_read_uint8(data, &b)) return False;
+ if (blob.length < 2) return False;
+
+ b = blob.data;
- tmp_oid = talloc_asprintf(NULL, "%u", b/40);
+ tmp_oid = talloc_asprintf(NULL, "%u", b[0]/40);
if (!tmp_oid) goto nomem;
- tmp_oid = talloc_asprintf_append(tmp_oid, ".%u", b%40);
+ tmp_oid = talloc_asprintf_append(tmp_oid, ".%u", b[0]%40);
if (!tmp_oid) goto nomem;
- while (!data->has_error && asn1_tag_remaining(data) > 0) {
- uint_t v = 0;
- do {
- asn1_read_uint8(data, &b);
- v = (v<<7) | (b&0x7f);
- } while (!data->has_error && (b & 0x80));
- tmp_oid = talloc_asprintf_append(tmp_oid, ".%u", v);
+ for(i = 1, v = 0; i < blob.length; i++) {
+ v = (v<<7) | (b[i]&0x7f);
+ if ( ! (b[i] & 0x80)) {
+ tmp_oid = talloc_asprintf_append(tmp_oid, ".%u", v);
+ v = 0;
+ }
if (!tmp_oid) goto nomem;
}
- if (!data->has_error) {
- *OID = tmp_oid;
- } else {
+ if (v != 0) {
talloc_free(tmp_oid);
+ return False;
}
- return !data->has_error;
+ *OID = tmp_oid;
+ return True;
+
nomem:
- talloc_free(tmp_oid);
- data->has_error = True;
return False;
}
/* read an object ID from a ASN1 buffer */
BOOL asn1_read_OID(struct asn1_data *data, const char **OID)
{
+ DATA_BLOB blob;
+ int len;
+
if (!asn1_start_tag(data, ASN1_OID)) return False;
- if (!asn1_read_OID_String(data, OID)) return False;
- if (!asn1_end_tag(data)) {
- talloc_free(discard_const(*OID));
- *OID = NULL;
+
+ len = asn1_tag_remaining(data);
+ if (len < 0) {
+ data->has_error = True;
+ return False;
+ }
+
+ blob = data_blob(NULL, len);
+ if (!blob.data) {
+ data->has_error = True;
+ return False;
+ }
+
+ asn1_read(data, blob.data, len);
+ asn1_end_tag(data);
+ if (data->has_error) {
+ data_blob_free(&blob);
return False;
}
+
+ if (!ber_read_OID_String(blob, OID)) {
+ data->has_error = True;
+ data_blob_free(&blob);
+ return False;
+ }
+
+ data_blob_free(&blob);
return True;
}