Re: [PATCH v2 5/7] efi: Import certificates from UEFI Secure Boot

On Sun, 9 Dec 2018, Nayna Jain wrote:

+/*
+ * Blacklist an X509 TBS hash.
+ */
+static __init void uefi_blacklist_x509_tbs(const char *source,
+					   const void *data, size_t len)
+{
+	char *hash, *p;
+
+	hash = kmalloc(4 + len * 2 + 1, GFP_KERNEL);
+	if (!hash)
+		return;
+	p = memcpy(hash, "tbs:", 4);
+	p += 4;
+	bin2hex(p, data, len);
+	p += len * 2;
+	*p = 0;
+
+	mark_hash_blacklisted(hash);
+	kfree(hash);
+}
+
+/*
+ * Blacklist the hash of an executable.
+ */
+static __init void uefi_blacklist_binary(const char *source,
+					 const void *data, size_t len)
+{
+	char *hash, *p;
+
+	hash = kmalloc(4 + len * 2 + 1, GFP_KERNEL);
+	if (!hash)
+		return;
+	p = memcpy(hash, "bin:", 4);
+	p += 4;
+	bin2hex(p, data, len);
+	p += len * 2;
+	*p = 0;
+
+	mark_hash_blacklisted(hash);
+	kfree(hash);
+}

These could be refactored into one function.


-- 
James Morris
[off-list ref]