From 39a1ff8ceab4b74164b2e19217206e7226aa9cd8 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Mon, 29 Apr 2019 13:51:45 +0200 Subject: efi_loader: optional data in load options are binary The field boot OptionalData in structure _EFI_LOAD_OPTIONS is for binary data. When we use `efidebug boot add` we should convert the 5th argument from UTF-8 to UTF-16 before putting it into the BootXXXX variable. When printing boot variables with `efidebug boot dump` we should support the OptionalData being arbitrary binary data. So let's dump the data as hexadecimal values. Here is an example session protocol: => efidebug boot add 00a1 label1 scsi 0:1 doit1 'my option' => efidebug boot add 00a2 label2 scsi 0:1 doit2 => efidebug boot dump Boot00A0: attributes: A-- (0x00000001) label: label1 file_path: .../HD(1,MBR,0xeac4e18b,0x800,0x3fffe)/doit1 data: 00000000: 6d 00 79 00 20 00 6f 00 70 00 74 00 69 00 6f 00 m.y. .o.p.t.i.o. 00000010: 6e 00 00 00 n... Boot00A1: attributes: A-- (0x00000001) label: label2 file_path: .../HD(1,MBR,0xeac4e18b,0x800,0x3fffe)/doit2 data: Signed-off-by: Heinrich Schuchardt --- lib/efi_loader/efi_bootmgr.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'lib/efi_loader') diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c index 4ccba22..7bf5187 100644 --- a/lib/efi_loader/efi_bootmgr.c +++ b/lib/efi_loader/efi_bootmgr.c @@ -53,19 +53,20 @@ void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data) */ unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data) { - unsigned long label_len, option_len; + unsigned long label_len; unsigned long size; u8 *p; label_len = (u16_strlen(lo->label) + 1) * sizeof(u16); - option_len = strlen((char *)lo->optional_data); /* total size */ size = sizeof(lo->attributes); size += sizeof(lo->file_path_length); size += label_len; size += lo->file_path_length; - size += option_len + 1; + if (lo->optional_data) + size += (utf8_utf16_strlen((const char *)lo->optional_data) + + 1) * sizeof(u16); p = malloc(size); if (!p) return 0; @@ -84,10 +85,10 @@ unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data) memcpy(p, lo->file_path, lo->file_path_length); p += lo->file_path_length; - memcpy(p, lo->optional_data, option_len); - p += option_len; - *(char *)p = '\0'; - + if (lo->optional_data) { + utf8_utf16_strcpy((u16 **)&p, (const char *)lo->optional_data); + p += sizeof(u16); /* size of trailing \0 */ + } return size; } -- cgit v1.1