Use current_euid() and task_pid_nr(current) to get identifiers for owners (for imposed limits).

1 files changed, 63 insertions, 0 deletions

diff --git a/userspace/setkey.c b/userspace/setkey.c
new file mode 100644
index 0000000..2642b90
--- /dev/null
+++ b/userspace/setkey.c
@@ -0,0 +1,63 @@
+/*
+ * Demo on how to use /dev/crypto device for HMAC.
+ *
+ * Placed under public domain.
+ *
+ */
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "../ncr.h"
+#include <stdlib.h>
+
+
+
+int main(int argc, char** argv)
+{
+	int fd = -1;
+	FILE* fp;
+	struct ncr_master_key_st key;
+	int size;
+	
+	if (argc != 2) {
+		fprintf(stderr, "Usage: setkey [filename]\n");
+		exit(1);
+	}
+	
+	memset(&key, 0, sizeof(key));
+	fp = fopen(argv[1], "r");
+	size = fread(key.key, 1, sizeof(key.key), fp);
+	if (size < 16) {
+		fprintf(stderr, "Illegal key!\n");
+		exit(1);
+	}
+	fclose(fp);
+	key.key_size = size;
+
+	/* Open the crypto device */
+	fd = open("/dev/crypto", O_RDWR, 0);
+	if (fd < 0) {
+		perror("open(/dev/crypto)");
+		return 1;
+	}
+
+	/* encrypt */
+	
+	if (ioctl(fd, NCRIO_MASTER_KEY_SET, &key)) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		perror("ioctl(NCRIO_MASTER_KEY_SET)");
+		return 1;
+	}
+	/* Close the original descriptor */
+	if (close(fd)) {
+		perror("close(fd)");
+		return 1;
+	}
+
+	return 0;
+}