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[crypto] Generalise X.509 cache to a full certificate store

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Expand the concept of the X.509 cache to provide the functionality of
a certificate store.  Certificates in the store will be automatically
used to complete certificate chains where applicable.

The certificate store may be prepopulated at build time using the
CERT=... build command line option.  For example:

  make bin/ipxe.usb CERT=mycert1.crt,mycert2.crt

Certificates within the certificate store are not implicitly trusted;
the trust list is specified using TRUST=... as before.  For example:

  make bin/ipxe.usb CERT=root.crt TRUST=root.crt

This can be used to embed the full trusted root certificate within the
iPXE binary, which is potentially useful in an HTTPS-only environment
in which there is no HTTP server from which to automatically download
cross-signed certificates or other certificate chain fragments.

This usage of CERT= extends the existing use of CERT= to specify the
client certificate.  The client certificate is now identified
automatically by checking for a match against the private key.  For
example:

  make bin/ipxe.usb CERT=root.crt,client.crt TRUST=root.crt KEY=client.key

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-03-28 15:45:10 +00:00
parent 2dd3fffe18
commit bc8ca6b8ce
18 changed files with 640 additions and 398 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
src/tests/cms_test.c
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@@ -1305,7 +1305,13 @@ static uint8_t root_crt_fingerprint[] =
0x96, 0xe7, 0xa8, 0x6d, 0x63, 0x2d, 0x32, 0x38,
0xaf, 0x00, 0xc4, 0x1a, 0xfc, 0xd8, 0xac, 0xc3 );
/** Certificate store containing the iPXE self-test root CA */
/** Empty certificate store */
static struct x509_chain empty_store = {
.refcnt = REF_INIT ( ref_no_free ),
.links = LIST_HEAD_INIT ( empty_store.links ),
};
/** Root certificate list containing the iPXE self-test root CA */
static struct x509_root test_root = {
.digest = &cms_test_algorithm,
.count = 1,
@@ -1349,12 +1355,13 @@ static time_t test_expired = 1375573111ULL; /* Sat Aug 3 23:38:31 2013 */
* @v code Test signed code
* @v name Test verification name
* @v time Test verification time
* @v root Test root certificate store
* @v store Test certificate store
* @v root Test root certificate list
*/
#define cms_verify_ok( sgn, code, name, time, root ) do { \
#define cms_verify_ok( sgn, code, name, time, store, root ) do { \
x509_invalidate_chain ( (sgn)->sig->certificates ); \
ok ( cms_verify ( (sgn)->sig, virt_to_user ( (code)->data ), \
(code)->len, name, time, root ) == 0 ); \
(code)->len, name, time, store, root ) == 0 );\
} while ( 0 )
/**
@@ -1364,12 +1371,13 @@ static time_t test_expired = 1375573111ULL; /* Sat Aug 3 23:38:31 2013 */
* @v code Test signed code
* @v name Test verification name
* @v time Test verification time
* @v root Test root certificate store
* @v store Test certificate store
* @v root Test root certificate list
*/
#define cms_verify_fail_ok( sgn, code, name, time, root ) do { \
#define cms_verify_fail_ok( sgn, code, name, time, store, root ) do { \
x509_invalidate_chain ( (sgn)->sig->certificates ); \
ok ( cms_verify ( (sgn)->sig, virt_to_user ( (code)->data ), \
(code)->len, name, time, root ) != 0 ); \
(code)->len, name, time, store, root ) != 0 );\
} while ( 0 )
/**
@@ -1385,38 +1393,42 @@ static void cms_test_exec ( void ) {
cms_signature_ok ( &nonsigned_sig );
/* Check good signature */
cms_verify_ok ( &codesigned_sig, &test_code, "codesign.test.ipxe.org",
test_time, &empty_store, &test_root );
cms_verify_ok ( &codesigned_sig, &test_code,
"codesign.test.ipxe.org", test_time, &test_root );
cms_verify_ok ( &codesigned_sig, &test_code,
NULL, test_time, &test_root );
NULL, test_time, &empty_store, &test_root );
/* Check incorrect signer name */
cms_verify_fail_ok ( &codesigned_sig, &test_code,
"wrongname.test.ipxe.org", test_time, &test_root );
"wrongname.test.ipxe.org", test_time,
&empty_store, &test_root );
/* Check non-code-signing certificate */
cms_verify_fail_ok ( &genericsigned_sig, &test_code,
NULL, test_time, &test_root );
NULL, test_time, &empty_store, &test_root );
/* Check non-signing certificate */
cms_verify_fail_ok ( &nonsigned_sig, &test_code,
NULL, test_time, &test_root );
NULL, test_time, &empty_store, &test_root );
/* Check broken chain */
cms_verify_fail_ok ( &brokenchain_sig, &test_code,
NULL, test_time, &test_root );
NULL, test_time, &empty_store, &test_root );
/* Check untrusted signature */
cms_verify_fail_ok ( &codesigned_sig, &test_code,
NULL, test_time, &dummy_root );
NULL, test_time, &empty_store, &dummy_root );
/* Check incorrect signed content */
cms_verify_fail_ok ( &codesigned_sig, &bad_code,
NULL, test_time, &test_root );
NULL, test_time, &empty_store, &test_root );
/* Check expired signature */
cms_verify_fail_ok ( &codesigned_sig, &test_code,
NULL, test_expired, &test_root );
NULL, test_expired, &empty_store, &test_root );
/* Sanity check */
assert ( list_empty ( &empty_store.links ) );
/* Drop signature references */
cms_put ( nonsigned_sig.sig );