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@@ -1,197 +0,0 @@
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-From eb9d4fdf1846e688d51d86a9a50f0312aca2af25 Mon Sep 17 00:00:00 2001
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-From: Glenn Strauss <[email protected]>
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-Date: Sun, 23 Oct 2022 19:48:18 -0400
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-Subject: [PATCH] x509 crt verify SAN iPAddress
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-
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-Signed-off-by: Glenn Strauss <[email protected]>
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----
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- include/mbedtls/x509_crt.h | 2 +-
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- library/x509_crt.c | 126 ++++++++++++++++++++++++++++++-------
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- 2 files changed, 103 insertions(+), 25 deletions(-)
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-
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---- a/include/mbedtls/x509_crt.h
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-+++ b/include/mbedtls/x509_crt.h
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-@@ -596,7 +596,7 @@ int mbedtls_x509_crt_verify_info(char *b
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- * \param cn The expected Common Name. This will be checked to be
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- * present in the certificate's subjectAltNames extension or,
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- * if this extension is absent, as a CN component in its
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-- * Subject name. Currently only DNS names are supported. This
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-+ * Subject name. DNS names and IP addresses are supported. This
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- * may be \c NULL if the CN need not be verified.
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- * \param flags The address at which to store the result of the verification.
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- * If the verification couldn't be completed, the flag value is
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---- a/library/x509_crt.c
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-+++ b/library/x509_crt.c
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-@@ -45,6 +45,10 @@
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-
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- #if defined(MBEDTLS_HAVE_TIME)
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- #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
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-+#define WIN32_LEAN_AND_MEAN
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-+#ifndef _WIN32_WINNT
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-+#define _WIN32_WINNT 0x0600
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-+#endif
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- #include <windows.h>
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- #else
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- #include <time.h>
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-@@ -2990,6 +2994,61 @@ find_parent:
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- }
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- }
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-
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-+#ifdef _WIN32
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-+#ifdef _MSC_VER
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-+#pragma comment(lib, "ws2_32.lib")
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-+#include <winsock2.h>
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-+#include <ws2tcpip.h>
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-+#elif (defined(__MINGW32__) || defined(__MINGW64__)) && _WIN32_WINNT >= 0x0600
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-+#include <winsock2.h>
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-+#include <ws2tcpip.h>
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-+#endif
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-+#elif defined(__sun)
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-+/* Solaris requires -lsocket -lnsl for inet_pton() */
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-+#elif defined(__has_include)
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-+#if __has_include(<sys/socket.h>)
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-+#include <sys/socket.h>
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-+#endif
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-+#if __has_include(<arpa/inet.h>)
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-+#include <arpa/inet.h>
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-+#endif
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-+#endif
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-+
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-+/* Use whether or not AF_INET6 is defined to indicate whether or not to use
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-+ * the platform inet_pton() or a local implementation (below). The local
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-+ * implementation may be used even in cases where the platform provides
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-+ * inet_pton(), e.g. when there are different includes required and/or the
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-+ * platform implementation requires dependencies on additional libraries.
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-+ * Specifically, Windows requires custom includes and additional link
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-+ * dependencies, and Solaris requires additional link dependencies.
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-+ * Also, as a coarse heuristic, use the local implementation if the compiler
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-+ * does not support __has_include(), or if the definition of AF_INET6 is not
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-+ * provided by headers included (or not) via __has_include() above. */
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-+#ifndef AF_INET6
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-+
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-+#define x509_cn_inet_pton(cn, dst) (0)
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-+
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-+#else
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-+
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-+static int x509_inet_pton_ipv6(const char *src, void *dst)
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-+{
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-+ return inet_pton(AF_INET6, src, dst) == 1 ? 0 : -1;
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-+}
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-+
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-+static int x509_inet_pton_ipv4(const char *src, void *dst)
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-+{
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-+ return inet_pton(AF_INET, src, dst) == 1 ? 0 : -1;
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-+}
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-+
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-+#endif /* AF_INET6 */
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-+
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-+static size_t x509_cn_inet_pton(const char *cn, void *dst)
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-+{
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-+ return strchr(cn, ':') == NULL
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-+ ? x509_inet_pton_ipv4(cn, dst) == 0 ? 4 : 0
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-+ : x509_inet_pton_ipv6(cn, dst) == 0 ? 16 : 0;
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-+}
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-+
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- /*
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- * Check for CN match
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- */
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-@@ -3010,24 +3069,51 @@ static int x509_crt_check_cn(const mbedt
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- return -1;
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- }
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-
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-+static int x509_crt_check_san_ip(const mbedtls_x509_sequence *san,
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-+ const char *cn, size_t cn_len)
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-+{
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-+ uint32_t ip[4];
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-+ cn_len = x509_cn_inet_pton(cn, ip);
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-+ if (cn_len == 0) {
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-+ return -1;
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-+ }
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-+
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-+ for (const mbedtls_x509_sequence *cur = san; cur != NULL; cur = cur->next) {
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-+ const unsigned char san_type = (unsigned char) cur->buf.tag &
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-+ MBEDTLS_ASN1_TAG_VALUE_MASK;
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-+ if (san_type == MBEDTLS_X509_SAN_IP_ADDRESS &&
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-+ cur->buf.len == cn_len && memcmp(cur->buf.p, ip, cn_len) == 0) {
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-+ return 0;
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-+ }
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-+ }
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-+
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-+ return -1;
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-+}
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-+
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- /*
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- * Check for SAN match, see RFC 5280 Section 4.2.1.6
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- */
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--static int x509_crt_check_san(const mbedtls_x509_buf *name,
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-+static int x509_crt_check_san(const mbedtls_x509_sequence *san,
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- const char *cn, size_t cn_len)
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- {
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-- const unsigned char san_type = (unsigned char) name->tag &
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-- MBEDTLS_ASN1_TAG_VALUE_MASK;
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--
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-- /* dNSName */
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-- if (san_type == MBEDTLS_X509_SAN_DNS_NAME) {
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-- return x509_crt_check_cn(name, cn, cn_len);
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-+ int san_ip = 0;
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-+ for (const mbedtls_x509_sequence *cur = san; cur != NULL; cur = cur->next) {
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-+ switch ((unsigned char) cur->buf.tag & MBEDTLS_ASN1_TAG_VALUE_MASK) {
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-+ case MBEDTLS_X509_SAN_DNS_NAME: /* dNSName */
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-+ if (x509_crt_check_cn(&cur->buf, cn, cn_len) == 0) {
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-+ return 0;
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-+ }
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-+ break;
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-+ case MBEDTLS_X509_SAN_IP_ADDRESS: /* iPAddress */
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-+ san_ip = 1;
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-+ break;
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-+ /* (We may handle other types here later.) */
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-+ default: /* Unrecognized type */
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-+ break;
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-+ }
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- }
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-
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-- /* (We may handle other types here later.) */
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--
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-- /* Unrecognized type */
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-- return -1;
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-+ return san_ip ? x509_crt_check_san_ip(san, cn, cn_len) : -1;
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- }
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-
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- /*
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-@@ -3038,31 +3124,23 @@ static void x509_crt_verify_name(const m
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- uint32_t *flags)
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- {
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- const mbedtls_x509_name *name;
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-- const mbedtls_x509_sequence *cur;
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- size_t cn_len = strlen(cn);
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-
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- if (crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME) {
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-- for (cur = &crt->subject_alt_names; cur != NULL; cur = cur->next) {
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-- if (x509_crt_check_san(&cur->buf, cn, cn_len) == 0) {
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-- break;
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-- }
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-- }
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--
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-- if (cur == NULL) {
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-- *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
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-+ if (x509_crt_check_san(&crt->subject_alt_names, cn, cn_len) == 0) {
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-+ return;
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- }
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- } else {
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- for (name = &crt->subject; name != NULL; name = name->next) {
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- if (MBEDTLS_OID_CMP(MBEDTLS_OID_AT_CN, &name->oid) == 0 &&
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- x509_crt_check_cn(&name->val, cn, cn_len) == 0) {
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-- break;
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-+ return;
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- }
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- }
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-
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-- if (name == NULL) {
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-- *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
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-- }
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- }
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-+
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-+ *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
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- }
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-
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- /*
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