From ab7d5e8983d59d0d984dc0ea30bc53852772c816 Mon Sep 17 00:00:00 2001 From: Jarrod Johnson Date: Sat, 2 Nov 2013 08:14:37 -0400 Subject: [PATCH] Revert "From: Alexander Chernyakhovsky " This reverts commit 7baf1781fba3003ab6b899028d83aac930ca3e16. --- src/crypto/x509.c | 57 ----------------------------------------- src/include/ipxe/asn1.h | 5 ---- src/include/ipxe/x509.h | 17 ------------ src/net/tls.c | 36 +++----------------------- 4 files changed, 3 insertions(+), 112 deletions(-) diff --git a/src/crypto/x509.c b/src/crypto/x509.c index 323e5fab..d54124c5 100644 --- a/src/crypto/x509.c +++ b/src/crypto/x509.c @@ -520,54 +520,6 @@ static int x509_parse_key_usage ( struct x509_certificate *cert, return 0; } -/** - * Parse X.509 certificate subject alternative name - * - * @v cert X.509 certificate - * @v raw ASN.1 cursor - * @ret rc Return status code - */ -static int x509_parse_subject_alt_name ( struct x509_certificate *cert, - const struct asn1_cursor *raw ) { - struct x509_subject_alt_name *subject_alt_name = &cert->extensions.subject_alt_name; - struct asn1_cursor cursor; - struct asn1_cursor string_cursor; - int rc; - - /* Mark extension as present */ - subject_alt_name->present = 1; - - DBGC ( cert, "X509 %p parsing subjectAltName\n", cert ); - - /* Enter GeneralNames */ - memcpy ( &cursor, raw, sizeof ( cursor ) ); - asn1_enter ( &cursor, ASN1_SEQUENCE ); - DBGC_HDA ( cert, 0, cursor.data, 128 ); - - INIT_LIST_HEAD ( &subject_alt_name->names ); - - /* Parse each name in turn */ - while ( cursor.len ) { - memcpy ( &string_cursor, &cursor, sizeof ( string_cursor ) ); - if ( ( rc = asn1_enter ( &string_cursor, ASN1_IMPLICIT_TAG ( 2 ) ) ) == 0 ) { - char* name = zalloc ( string_cursor.len + 1 ); - memcpy ( name, string_cursor.data, string_cursor.len ); - if ( strlen ( name ) != string_cursor.len ) { - DBGC ( cert, "X509 %p contains malicious subjectAltName\n", - cert ); - return rc; - } - //DBGC ( cert, "X509 %p subjectAltName %s\n", cert, name ); - struct x509_san_link* link = zalloc ( sizeof ( struct x509_san_link ) ); - link->name = name; - list_add ( &link->list, &subject_alt_name->names ); - } - asn1_skip_any ( &cursor ); - } - - return 0; -} - /** "id-kp-codeSigning" object identifier */ static uint8_t oid_code_signing[] = { ASN1_OID_CODESIGNING }; @@ -786,10 +738,6 @@ static uint8_t oid_ce_basic_constraints[] = static uint8_t oid_ce_key_usage[] = { ASN1_OID_KEYUSAGE }; -/** "id-ce-keyUsage" object identifier */ -static uint8_t oid_ce_subject_alt_name[] = - { ASN1_OID_SUBJECTALTNAME }; - /** "id-ce-extKeyUsage" object identifier */ static uint8_t oid_ce_ext_key_usage[] = { ASN1_OID_EXTKEYUSAGE }; @@ -810,11 +758,6 @@ static struct x509_extension x509_extensions[] = { .oid = ASN1_OID_CURSOR ( oid_ce_key_usage ), .parse = x509_parse_key_usage, }, - { - .name = "subjectAltName", - .oid = ASN1_OID_CURSOR ( oid_ce_subject_alt_name ), - .parse = x509_parse_subject_alt_name, - }, { .name = "extKeyUsage", .oid = ASN1_OID_CURSOR ( oid_ce_ext_key_usage ), diff --git a/src/include/ipxe/asn1.h b/src/include/ipxe/asn1.h index 2b84afc9..3e73b59c 100644 --- a/src/include/ipxe/asn1.h +++ b/src/include/ipxe/asn1.h @@ -170,11 +170,6 @@ struct asn1_builder_header { ASN1_OID_INITIAL ( 2, 5 ), ASN1_OID_SINGLE ( 29 ), \ ASN1_OID_SINGLE ( 15 ) -/** ASN1. OID for id-ce-subjectAltname (2.5.29.17) */ -#define ASN1_OID_SUBJECTALTNAME \ - ASN1_OID_INITIAL ( 2, 5 ), ASN1_OID_SINGLE ( 29 ), \ - ASN1_OID_SINGLE ( 17 ) - /** ASN.1 OID for id-ce-basicConstraints (2.5.29.19) */ #define ASN1_OID_BASICCONSTRAINTS \ ASN1_OID_INITIAL ( 2, 5 ), ASN1_OID_SINGLE ( 29 ), \ diff --git a/src/include/ipxe/x509.h b/src/include/ipxe/x509.h index e1a19d40..a47942a7 100644 --- a/src/include/ipxe/x509.h +++ b/src/include/ipxe/x509.h @@ -86,21 +86,6 @@ struct x509_basic_constraints { unsigned int path_len; }; -/** A link in an X.509 certificate chain */ -struct x509_san_link { - /** List of links */ - struct list_head list; - /** name */ - char* name; -}; - -struct x509_subject_alt_name { - /** Subject Alternative Name extension is present */ - int present; - /** General Name **/ - struct list_head names; -}; - /** Unlimited path length * * We use -2U, since this quantity represents one *fewer* than the @@ -165,8 +150,6 @@ struct x509_extensions { struct x509_basic_constraints basic; /** Key usage */ struct x509_key_usage usage; - /** Subject Alternative Name */ - struct x509_subject_alt_name subject_alt_name; /** Extended key usage */ struct x509_extended_key_usage ext_usage; /** Authority information access */ diff --git a/src/net/tls.c b/src/net/tls.c index c7964728..5e18f726 100644 --- a/src/net/tls.c +++ b/src/net/tls.c @@ -2427,37 +2427,6 @@ static struct interface_descriptor tls_cipherstream_desc = ****************************************************************************** */ -static int dns_wildcard_matcher( const char* dns, const char* wildcard ) { - if ( strchr ( wildcard, '*' ) == NULL ) { - /* No wildcard, just strcmp */ - return strcmp ( dns, wildcard ); - } - if ( strrchr(wildcard, '*') != wildcard ) { - /* This is multiple-wildcard. We can't handle that, so bail. */ - return -1; - } - const char* first_dot = strchr (dns, '.') ; - return strcmp ( first_dot, wildcard + 1 ); -} - -static int tls_validator_name( struct tls_session *tls, struct x509_certificate *cert ) { - /* Verify server name */ - if ( ( cert->subject.name == NULL ) && ( !cert->extensions.subject_alt_name.present ) ) { - return -1; - } - struct x509_san_link* link; - list_for_each_entry ( link, &cert->extensions.subject_alt_name.names, list ) { - /* If the name matches, return 0, otherwise, continue */ - if ( dns_wildcard_matcher ( tls->name, link->name ) == 0) { - return 0; - } - } - if ( !cert->extensions.subject_alt_name.present ) { - return dns_wildcard_matcher ( tls->name, cert->subject.name ); - } - return -1; -} - /** * Handle certificate validation completion * @@ -2475,7 +2444,7 @@ static void tls_validator_done ( struct tls_session *tls, int rc ) { /* Check for validation failure */ if ( rc != 0 ) { DBGC ( tls, "TLS %p certificate validation failed: %s\n", - tls, strerror ( rc ) ); + tls, strerror ( rc ) ); goto err; } DBGC ( tls, "TLS %p certificate validation succeeded\n", tls ); @@ -2485,7 +2454,8 @@ static void tls_validator_done ( struct tls_session *tls, int rc ) { assert ( cert != NULL ); /* Verify server name */ - if ( tls_validator_name( tls, cert ) ) { + if ( ( cert->subject.name == NULL ) || + ( strcmp ( cert->subject.name, tls->name ) != 0 ) ) { DBGC ( tls, "TLS %p server name incorrect (expected %s, got " "%s)\n", tls, tls->name, cert->subject.name ); rc = -EACCES_WRONG_NAME;