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[image] Use image_asn1() to extract data from CMS signature images 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/56/head
Michael Brown 2016-07-28 16:22:08 +01:00
parent 84add97ce9
commit 829fedafcb
2 changed files with 11 additions and 12 deletions
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1
src/hci/commands/image_trust_cmd.c
View File

@ -181,3 +181,4 @@ REQUIRE_OBJECT ( rsa );
REQUIRE_OBJECT ( md5 );
REQUIRE_OBJECT ( sha1 );
REQUIRE_OBJECT ( sha256 );
REQUIRE_OBJECT ( der );

22
src/usr/imgtrust.c
View File

@ -50,30 +50,28 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
*/
int imgverify ( struct image *image, struct image *signature,
const char *name ) {
size_t len;
void *data;
struct asn1_cursor *data;
struct cms_signature *sig;
struct cms_signer_info *info;
time_t now;
int next;
int rc;
/* Mark image as untrusted */
image_untrust ( image );
/* Copy signature to internal memory */
len = signature->len;
data = malloc ( len );
if ( ! data ) {
rc = -ENOMEM;
goto err_alloc;
/* Get raw signature data */
next = image_asn1 ( signature, 0, &data );
if ( next < 0 ) {
rc = next;
goto err_asn1;
}
copy_from_user ( data, signature->data, 0, len );
/* Parse signature */
if ( ( rc = cms_signature ( data, len, &sig ) ) != 0 )
if ( ( rc = cms_signature ( data->data, data->len, &sig ) ) != 0 )
goto err_parse;
/* Free internal copy of signature */
/* Free raw signature data */
free ( data );
data = NULL;
@ -107,7 +105,7 @@ int imgverify ( struct image *image, struct image *signature,
cms_put ( sig );
err_parse:
free ( data );
err_alloc:
err_asn1:
syslog ( LOG_ERR, "Image \"%s\" signature bad: %s\n",
image->name, strerror ( rc ) );
return rc;