1 files changed, 43 insertions, 0 deletions
diff --git a/usr/src/boot/lib/libstand/crypto/digest.c b/usr/src/boot/lib/libstand/crypto/digest.c
new file mode 100644
index 0000000000..7a1bd841b1
--- /dev/null
+++ b/usr/src/boot/lib/libstand/crypto/digest.c
@@ -0,0 +1,43 @@
+
+#include <sys/cdefs.h>
+#include <stand.h>
+#include <sys/sha1.h>
+
+#include <bootstrap.h>
+
+void
+sha1(void *data, size_t size, uint8_t *result)
+{
+	SHA1_CTX sha1_ctx;
+
+	SHA1Init(&sha1_ctx);
+	SHA1Update(&sha1_ctx, data, size);
+	SHA1Final(result, &sha1_ctx);
+}
+
+static int
+command_sha1(int argc, char **argv)
+{
+	void *ptr;
+	size_t size, i;
+	uint8_t resultbuf[SHA1_DIGEST_LENGTH];
+
+	/*
+	 * usage: address size
+	 */
+	if (argc != 3) {
+		command_errmsg = "usage: address size";
+		return (CMD_ERROR);
+	}
+
+	ptr = (void *)(uintptr_t)strtol(argv[1], NULL, 0);
+	size = strtol(argv[2], NULL, 0);
+	sha1(ptr, size, resultbuf);
+
+	for (i = 0; i < SHA1_DIGEST_LENGTH; i++)
+		printf("%02x", resultbuf[i]);
+	printf("\n");
+	return (CMD_OK);
+}
+
+COMMAND_SET(sha1, "sha1", "print the sha1 checksum", command_sha1);