ref: 50791b875552b0dc5748aa67c95776736f6ff4b7
dir: /sys/src/cmd/auth/rsa2asn1.c/
#include <u.h> #include <libc.h> #include <auth.h> #include <mp.h> #include <libsec.h> #include "rsa2any.h" int privatekey = 0; void usage(void) { fprint(2, "usage: auth/rsa2asn1 [-a] [file]\n"); exits("usage"); } void main(int argc, char **argv) { uchar buf[16*1024]; RSApriv *k; int n; ARGBEGIN{ case 'a': privatekey = 1; break; default: usage(); }ARGEND if(argc > 1) usage(); if((k = getrsakey(argc, argv, privatekey, nil)) == nil) sysfatal("%r"); if(privatekey){ if((n = asn1encodeRSApriv(k, buf, sizeof(buf))) < 0) sysfatal("asn1encodeRSApriv: %r"); }else{ if((n = asn1encodeRSApub(&k->pub, buf, sizeof(buf))) < 0) sysfatal("asn1encodeRSApub: %r"); } if(write(1, buf, n) != n) sysfatal("write: %r"); exits(nil); }