1 files changed, 56 insertions, 0 deletions
diff --git a/src/cmd/auth/rsa2ssh.c b/src/cmd/auth/rsa2ssh.c
new file mode 100644
index 00000000..3de2792e
--- /dev/null
+++ b/src/cmd/auth/rsa2ssh.c
@@ -0,0 +1,56 @@
+#include <u.h>
+#include <libc.h>
+#include <auth.h>
+#include <mp.h>
+#include <libsec.h>
+#include "rsa2any.h"
+
+int ssh2;
+
+void
+usage(void)
+{
+	fprint(2, "usage: auth/rsa2ssh [-2] [-c comment] [file]\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	RSApriv *k;
+	char *comment;
+	
+	fmtinstall('B', mpfmt);
+	fmtinstall('[', encodefmt);
+	comment = "";
+	ARGBEGIN{
+	case '2':
+		ssh2 = 1;
+		break;
+	case 'c':
+		comment = EARGF(usage());
+		break;
+	default:
+		usage();
+	}ARGEND
+
+	if(argc > 1)
+		usage();
+
+	if((k = getkey(argc, argv, 0, nil)) == nil)
+		sysfatal("%r");
+
+	if(ssh2){
+		uchar buf[8192], *p;
+		
+		p = buf;
+		p = put4(p, 7);
+		p = putn(p, "ssh-rsa", 7);
+		p = putmp2(p, k->pub.ek);
+		p = putmp2(p, k->pub.n);
+		print("ssh-rsa %.*[ %s\n", p-buf, buf, comment);
+	}else
+		print("%d %.10B %.10B %s\n", mpsignif(k->pub.n), k->pub.ek,
+			k->pub.n, comment);
+	exits(nil);
+}