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[crypto] Add more ASN.1 functions for X.509 certificate parsing

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-03-18 13:24:20 +00:00
parent da76a489d6
commit e20550fddf
3 changed files with 125 additions and 9 deletions
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26
src/include/ipxe/asn1.h
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@@ -20,6 +20,9 @@ struct asn1_cursor {
/** ASN.1 end */
#define ASN1_END 0x00
/** ASN.1 boolean */
#define ASN1_BOOLEAN 0x01
/** ASN.1 integer */
#define ASN1_INTEGER 0x02
@@ -48,7 +51,7 @@ struct asn1_cursor {
#define ASN1_SET 0x31
/** ASN.1 explicit tag */
#define ASN1_EXPLICIT_TAG 0xa0
#define ASN1_EXPLICIT_TAG( number) ( 0xa0 | (number) )
/** ASN.1 "any tag" magic value */
#define ASN1_ANY -1U
@@ -79,15 +82,14 @@ struct asn1_cursor {
/** ASN.1 OID for iso(1) member-body(2) */
#define ASN1_OID_ISO_MEMBERBODY ASN1_OID_INITIAL ( 1, 2 )
/** ASN.1 OID for iso(1) identified-organization(3) */
#define ASN1_OID_IDENTIFIED_ORGANIZATION ASN1_OID_INITIAL ( 1, 3 )
/** ASN.1 OID for joint-iso-itu-t(2) ds(5) */
#define ASN1_OID_DIRECTORY_SERVICES ASN1_OID_INITIAL ( 2, 5 )
/** ASN.1 OID for joint-iso-itu-t(2) ds(5) attributeType(4) */
#define ASN1_OID_ATTRIBUTE_TYPE \
ASN1_OID_DIRECTORY_SERVICES, ASN1_OID_SINGLE ( 4 )
/** ASN.1 OID for joint-iso-itu-t(2) ds(5) attributeType(4) commonName(3) */
#define ASN1_OID_COMMON_NAME ASN1_OID_ATTRIBUTE_TYPE, ASN1_OID_SINGLE ( 3 )
/** ASN.1 OID for joint-iso-itu-t(2) country(16) */
#define ASN1_OID_COUNTRY ASN1_OID_INITIAL ( 2, 16 )
/** Define an ASN.1 cursor containing an OID */
#define ASN1_OID_CURSOR( oid_value ) { \
@@ -95,6 +97,12 @@ struct asn1_cursor {
.len = sizeof ( oid_value ), \
}
/** An ASN.1 boolean */
struct asn1_boolean {
/** Value */
uint8_t value;
} __attribute__ (( packed ));
/** An ASN.1 bit string */
struct asn1_bit_string {
/** Number of unused bits */
@@ -119,8 +127,12 @@ extern int asn1_enter ( struct asn1_cursor *cursor, unsigned int type );
extern int asn1_skip_if_exists ( struct asn1_cursor *cursor,
unsigned int type );
extern int asn1_skip ( struct asn1_cursor *cursor, unsigned int type );
extern int asn1_shrink ( struct asn1_cursor *cursor, unsigned int type );
extern int asn1_enter_any ( struct asn1_cursor *cursor );
extern int asn1_skip_any ( struct asn1_cursor *cursor );
extern int asn1_shrink_any ( struct asn1_cursor *cursor );
extern int asn1_boolean ( const struct asn1_cursor *cursor );
extern int asn1_integer ( const struct asn1_cursor *cursor, int *value );
extern int asn1_compare ( const struct asn1_cursor *cursor1,
const struct asn1_cursor *cursor2 );