sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2026-01-02 01:42:37 +03:00
Code Issues Packages Projects Releases Wiki Activity

[crypto] Add x509_auto_append()

Browse Source 
CMS includes an unordered certificate set, from which certificates
must be extracted in order by matching up issuers with subjects.  We
will use the same functionality as part of the automatic download of
cross-signing certificates.  Generalise cms_find_subject() to
x509_find_subject(), and create x509_auto_append().

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-05-08 11:12:09 +01:00
parent 99c798d87a
commit 1a5f025ad8
3 changed files with 81 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
src/crypto/x509.c
View File

@@ -1678,6 +1678,72 @@ int x509_append_raw ( struct x509_chain *chain, const void *data,
return rc;
}
/**
* Identify X.509 certificate by subject
*
* @v certs X.509 certificate list
* @v subject Subject
* @ret cert X.509 certificate, or NULL if not found
*/
static struct x509_certificate *
x509_find_subject ( struct x509_chain *certs,
const struct asn1_cursor *subject ) {
struct x509_link *link;
struct x509_certificate *cert;
/* Scan through certificate list */
list_for_each_entry ( link, &certs->links, list ) {
/* Check subject */
cert = link->cert;
if ( asn1_compare ( subject, &cert->subject.raw ) == 0 )
return cert;
}
return NULL;
}
/**
* Append X.509 certificates to X.509 certificate chain
*
* @v chain X.509 certificate chain
* @v certs X.509 certificate list
* @ret rc Return status code
*
* Certificates will be automatically appended to the chain based upon
* the subject and issuer names.
*/
int x509_auto_append ( struct x509_chain *chain, struct x509_chain *certs ) {
struct x509_certificate *cert;
struct x509_certificate *previous;
int rc;
/* Get current certificate */
cert = x509_last ( chain );
if ( ! cert ) {
DBGC ( chain, "X509 chain %p has no certificates\n", chain );
return -EINVAL;
}
/* Append certificates, in order */
while ( 1 ) {
/* Find issuing certificate */
previous = cert;
cert = x509_find_subject ( certs, &cert->issuer.raw );
if ( ! cert )
break;
if ( cert == previous )
break;
/* Append certificate to chain */
if ( ( rc = x509_append ( chain, cert ) ) != 0 )
return rc;
}
return 0;
}
/**
* Validate X.509 certificate chain
*