ref: 38ea1ac105f4484f02bba3bfbc790ebe4f18f016
dir: /sys/src/cmd/auth/rsa2ssh.c/
#include <u.h> #include <libc.h> #include <auth.h> #include <mp.h> #include <libsec.h> #include "rsa2any.h" void usage(void) { fprint(2, "usage: auth/rsa2ssh [-c comment] [file]\n"); exits("usage"); } void main(int argc, char **argv) { RSApriv *k; char *comment, *s; uchar buf[8192], *p; fmtinstall('B', mpfmt); fmtinstall('[', encodefmt); comment = ""; ARGBEGIN{ case 'c': comment = EARGF(usage()); break; case '2': /* backwards compatibility */ break; default: usage(); }ARGEND if(argc > 1) usage(); if((k = getrsakey(argc, argv, 0, nil)) == nil) sysfatal("%r"); p = buf; p = put4(p, 7); p = putn(p, "ssh-rsa", 7); p = putmp2(p, k->pub.ek); p = putmp2(p, k->pub.n); s = smprint("ssh-rsa %.*[ %s\n", (int)(p-buf), buf, comment); if(s == nil) sysfatal("smprint: %r"); if(write(1, s, strlen(s)) != strlen(s)) sysfatal("write: %r"); exits(nil); }