summaryrefslogtreecommitdiff
path: root/common/cmd_blob.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/cmd_blob.c')
-rw-r--r--common/cmd_blob.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/common/cmd_blob.c b/common/cmd_blob.c
new file mode 100644
index 0000000..82ecaf0
--- /dev/null
+++ b/common/cmd_blob.c
@@ -0,0 +1,109 @@
+/*
+ *
+ * Command for encapsulating/decapsulating blob of memory.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <malloc.h>
+#include <asm/byteorder.h>
+#include <linux/compiler.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * blob_decap() - Decapsulate the data as a blob
+ * @key_mod: - Pointer to key modifier/key
+ * @src: - Address of data to be decapsulated
+ * @dst: - Address of data to be decapsulated
+ * @len: - Size of data to be decapsulated
+ *
+ * Returns zero on success,and negative on error.
+ */
+__weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
+{
+ return 0;
+}
+
+/**
+ * blob_encap() - Encapsulate the data as a blob
+ * @key_mod: - Pointer to key modifier/key
+ * @src: - Address of data to be encapsulated
+ * @dst: - Address of data to be encapsulated
+ * @len: - Size of data to be encapsulated
+ *
+ * Returns zero on success,and negative on error.
+ */
+__weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
+{
+ return 0;
+}
+
+/**
+ * do_blob() - Handle the "blob" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ */
+static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ uint32_t key_addr, src_addr, dst_addr, len;
+ uint8_t *km_ptr, *src_ptr, *dst_ptr;
+ int enc, ret = 0;
+
+ if (argc != 6)
+ return CMD_RET_USAGE;
+
+ if (!strncmp(argv[1], "enc", 3))
+ enc = 1;
+ else if (!strncmp(argv[1], "dec", 3))
+ enc = 0;
+ else
+ return CMD_RET_USAGE;
+
+ src_addr = simple_strtoul(argv[2], NULL, 16);
+ dst_addr = simple_strtoul(argv[3], NULL, 16);
+ len = simple_strtoul(argv[4], NULL, 16);
+ key_addr = simple_strtoul(argv[5], NULL, 16);
+
+ km_ptr = (uint8_t *)key_addr;
+ src_ptr = (uint8_t *)src_addr;
+ dst_ptr = (uint8_t *)dst_addr;
+
+ if (enc)
+ ret = blob_encap(km_ptr, src_ptr, dst_ptr, len);
+ else
+ ret = blob_decap(km_ptr, src_ptr, dst_ptr, len);
+
+ return ret;
+}
+
+/***************************************************/
+static char blob_help_text[] =
+ "enc src dst len km - Encapsulate and create blob of data\n"
+ " $len bytes long at address $src and\n"
+ " store the result at address $dst.\n"
+ " $km is the 16 byte key modifier\n"
+ " is also required for generation/use as\n"
+ " key for cryptographic operation. Key\n"
+ " modifier should be 16 byte long.\n"
+ "blob dec src dst len km - Decapsulate the blob of data at address\n"
+ " $src and store result of $len byte at\n"
+ " addr $dst.\n"
+ " $km is the 16 byte key modifier\n"
+ " is also required for generation/use as\n"
+ " key for cryptographic operation. Key\n"
+ " modifier should be 16 byte long.\n";
+
+U_BOOT_CMD(
+ blob, 6, 1, do_blob,
+ "Blob encapsulation/decryption",
+ blob_help_text
+);