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$NetBSD: patch-ext_openssl_openssl.c,v 1.2.2.2 2013/08/25 16:52:09 tron Exp $
Fix for CVE-2013-4248.
--- ext/openssl/openssl.c.orig 2013-07-10 17:43:08.000000000 +0000
+++ ext/openssl/openssl.c
@@ -1326,6 +1326,75 @@ PHP_FUNCTION(openssl_x509_check_private_
}
/* }}} */
+
+/* Special handling of subjectAltName, see CVE-2013-4073
+ * Christian Heimes
+ */
+
+static int openssl_x509v3_subjectAltName(BIO *bio, X509_EXTENSION *extension)
+{
+ GENERAL_NAMES *names;
+ const X509V3_EXT_METHOD *method = NULL;
+ long i, length, num;
+ const unsigned char *p;
+
+ method = X509V3_EXT_get(extension);
+ if (method == NULL) {
+ return -1;
+ }
+
+ p = extension->value->data;
+ length = extension->value->length;
+ if (method->it) {
+ names = (GENERAL_NAMES*)(ASN1_item_d2i(NULL, &p, length,
+ ASN1_ITEM_ptr(method->it)));
+ } else {
+ names = (GENERAL_NAMES*)(method->d2i(NULL, &p, length));
+ }
+ if (names == NULL) {
+ return -1;
+ }
+
+ num = sk_GENERAL_NAME_num(names);
+ for (i = 0; i < num; i++) {
+ GENERAL_NAME *name;
+ ASN1_STRING *as;
+ name = sk_GENERAL_NAME_value(names, i);
+ switch (name->type) {
+ case GEN_EMAIL:
+ BIO_puts(bio, "email:");
+ as = name->d.rfc822Name;
+ BIO_write(bio, ASN1_STRING_data(as),
+ ASN1_STRING_length(as));
+ break;
+ case GEN_DNS:
+ BIO_puts(bio, "DNS:");
+ as = name->d.dNSName;
+ BIO_write(bio, ASN1_STRING_data(as),
+ ASN1_STRING_length(as));
+ break;
+ case GEN_URI:
+ BIO_puts(bio, "URI:");
+ as = name->d.uniformResourceIdentifier;
+ BIO_write(bio, ASN1_STRING_data(as),
+ ASN1_STRING_length(as));
+ break;
+ default:
+ /* use builtin print for GEN_OTHERNAME, GEN_X400,
+ * GEN_EDIPARTY, GEN_DIRNAME, GEN_IPADD and GEN_RID
+ */
+ GENERAL_NAME_print(bio, name);
+ }
+ /* trailing ', ' except for last element */
+ if (i < (num - 1)) {
+ BIO_puts(bio, ", ");
+ }
+ }
+ sk_GENERAL_NAME_pop_free(names, GENERAL_NAME_free);
+
+ return 0;
+}
+
/* {{{ proto array openssl_x509_parse(mixed x509 [, bool shortnames=true])
Returns an array of the fields/values of the CERT */
PHP_FUNCTION(openssl_x509_parse)
@@ -1422,15 +1491,29 @@ PHP_FUNCTION(openssl_x509_parse)
for (i = 0; i < X509_get_ext_count(cert); i++) {
+ int nid;
extension = X509_get_ext(cert, i);
- if (OBJ_obj2nid(X509_EXTENSION_get_object(extension)) != NID_undef) {
+ nid = OBJ_obj2nid(X509_EXTENSION_get_object(extension));
+ if (nid != NID_undef) {
extname = (char *)OBJ_nid2sn(OBJ_obj2nid(X509_EXTENSION_get_object(extension)));
} else {
OBJ_obj2txt(buf, sizeof(buf)-1, X509_EXTENSION_get_object(extension), 1);
extname = buf;
}
bio_out = BIO_new(BIO_s_mem());
- if (X509V3_EXT_print(bio_out, extension, 0, 0)) {
+ if (nid == NID_subject_alt_name) {
+ if (openssl_x509v3_subjectAltName(bio_out, extension) == 0) {
+ add_assoc_stringl(subitem, extname, bio_buf->data, bio_buf->length, 1);
+ } else {
+ zval_dtor(return_value);
+ if (certresource == -1 && cert) {
+ X509_free(cert);
+ }
+ BIO_free(bio_out);
+ RETURN_FALSE;
+ }
+ }
+ else if (X509V3_EXT_print(bio_out, extension, 0, 0)) {
BIO_get_mem_ptr(bio_out, &bio_buf);
add_assoc_stringl(subitem, extname, bio_buf->data, bio_buf->length, 1);
} else {
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