Added submodule contents into tree

externals/mbedtls/programs/fuzz/fuzz_x509crt.c

@@ -0,0 +1,39 @@
+#include <stdint.h>
+#include "mbedtls/x509_crt.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
+{
+#ifdef MBEDTLS_X509_CRT_PARSE_C
+    int ret;
+    mbedtls_x509_crt crt;
+    unsigned char buf[4096];
+
+    mbedtls_x509_crt_init(&crt);
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_status_t status = psa_crypto_init();
+    if (status != PSA_SUCCESS) {
+        goto exit;
+    }
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+    ret = mbedtls_x509_crt_parse(&crt, Data, Size);
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+    if (ret == 0) {
+        ret = mbedtls_x509_crt_info((char *) buf, sizeof(buf) - 1, " ", &crt);
+    }
+#else
+    ((void) ret);
+    ((void) buf);
+#endif /* !MBEDTLS_X509_REMOVE_INFO */
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+exit:
+    mbedtls_psa_crypto_free();
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+    mbedtls_x509_crt_free(&crt);
+#else
+    (void) Data;
+    (void) Size;
+#endif
+
+    return 0;
+}