1 files changed, 47 insertions, 0 deletions
diff --git a/src/core/settings.c b/src/core/settings.c
index 9fbf753a..aa4bbae2 100644
--- a/src/core/settings.c
+++ b/src/core/settings.c
@@ -45,6 +45,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #include <ipxe/init.h>
 #include <ipxe/version.h>
 #include <ipxe/settings.h>
+#include <ipxe/md5.h>
 
 /** @file
  *
@@ -2133,6 +2134,46 @@ static int format_hex_raw_setting ( const struct setting_type *type __unused,
 	return hex_encode ( 0, raw, raw_len, buf, len );
 }
 
+/**
+ * Parsing md5 setting doesn't make any sense
+ *
+ * @v type		Setting type
+ * @v value		Formatted setting value
+ * @v buf		Buffer to contain raw value
+ * @v len		Length of buffer
+ * @v size		Integer size, in bytes
+ * @ret len		Length of raw value, or negative error
+ */
+static int parse_md5_setting ( const struct setting_type *type __unused,
+				   const char *value __unused, void *buf __unused,
+				   size_t len __unused ) {
+	return -ENOTSUP;
+}
+
+/**
+ * Format setting value as md5 hash (hex representation)
+ *
+ * @v type		Setting type
+ * @v raw		Raw setting value
+ * @v raw_len		Length of raw setting value
+ * @v buf		Buffer to contain formatted value
+ * @v len		Length of buffer
+ * @ret len		Length of formatted value, or negative error
+ */
+static int format_md5_setting ( const struct setting_type *type __unused,
+				    const void *raw, size_t raw_len,
+				    char *buf, size_t len ) {
+	struct md5_context ctx;
+	uint8_t digest[MD5_DIGEST_SIZE];
+
+	if ( len < MD5_DIGEST_SIZE * 2 )
+		return MD5_DIGEST_SIZE * 2;
+	digest_init ( &md5_algorithm, &ctx );
+	digest_update ( &md5_algorithm, &ctx, raw, raw_len );
+	digest_final ( &md5_algorithm, &ctx, digest );
+	return hex_encode ( 0, digest, sizeof(digest), buf, len );
+}
+
 /** A hex-string setting (colon-delimited) */
 const struct setting_type setting_type_hex __setting_type = {
 	.name = "hex",
@@ -2154,6 +2195,12 @@ const struct setting_type setting_type_hexraw __setting_type = {
 	.format = format_hex_raw_setting,
 };
 
+const struct setting_type setting_type_md5 __setting_type = {
+	.name = "md5",
+	.parse = parse_md5_setting,
+	.format = format_md5_setting,
+};
+
 /**
  * Parse Base64-encoded setting value
  *