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[x509] Record root of trust used when validating a certificate

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Record the root of trust used at the point that a certificate is
validated, redefine validation as checking a certificate against a
specific root of trust, and pass an explicit root of trust when
creating a TLS connection.

This allows a custom TLS connection to be used with a custom root of
trust, without causing any validated certificates to be treated as
valid for normal purposes.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2020-12-08 14:58:46 +00:00
parent 6e92d6213d
commit 39f5293492
13 changed files with 60 additions and 33 deletions
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6
src/crypto/ocsp.c
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@@ -284,7 +284,7 @@ int ocsp_check ( struct x509_certificate *cert,
/* Sanity checks */
assert ( cert != NULL );
assert ( issuer != NULL );
assert ( x509_is_valid ( issuer ) );
assert ( issuer->root != NULL );
/* Allocate and initialise check */
*ocsp = zalloc ( sizeof ( **ocsp ) );
@@ -915,7 +915,7 @@ int ocsp_validate ( struct ocsp_check *ocsp, time_t time ) {
*/
x509_invalidate ( signer );
if ( ( rc = x509_validate ( signer, ocsp->issuer, time,
NULL ) ) != 0 ) {
ocsp->issuer->root ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not validate ",
ocsp, x509_name ( ocsp->cert ) );
DBGC ( ocsp, "signer \"%s\": %s\n",
@@ -961,7 +961,7 @@ int ocsp_validate ( struct ocsp_check *ocsp, time_t time ) {
/* Validate certificate against issuer */
if ( ( rc = x509_validate ( ocsp->cert, ocsp->issuer, time,
NULL ) ) != 0 ) {
ocsp->issuer->root ) ) != 0 ) {
DBGC ( ocsp, "OCSP %p \"%s\" could not validate certificate: "
"%s\n", ocsp, x509_name ( ocsp->cert ), strerror ( rc ));
return rc;