72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/* Portions of this file are Copyright (C) 2015-2018 Giacomo Tesio <giacomo@tesio.it>
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* See /doc/license/gpl-2.0.txt for details about the licensing.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <bio.h>
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#include <mp.h>
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#include <libsec.h>
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void
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usage(void)
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{
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fprint(2, "auth/pemdecode section [file]\n");
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exits("usage");
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}
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void
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main(int argc, char **argv)
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{
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char *buf;
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uint8_t *bin;
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int fd;
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int32_t n, tot;
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int len;
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char *tag, *file;
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ARGBEGIN{
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default:
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usage();
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}ARGEND
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if(argc != 1 && argc != 2)
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usage();
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tag = argv[0];
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if(argc == 2)
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file = argv[1];
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else
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file = "#d/0";
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if((fd = sys_open(file, OREAD)) < 0)
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sysfatal("open %s: %r", file);
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buf = nil;
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tot = 0;
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for(;;){
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buf = realloc(buf, tot+8192);
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if(buf == nil)
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sysfatal("realloc: %r");
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if((n = jehanne_read(fd, buf+tot, 8192)) < 0)
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sysfatal("read: %r");
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if(n == 0)
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break;
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tot += n;
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}
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buf[tot] = 0;
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bin = decodePEM(buf, tag, &len, nil);
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if(bin == nil)
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sysfatal("cannot extract section '%s' from pem", tag);
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if((n=jehanne_write(1, bin, len)) != len)
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sysfatal("writing %d bytes got %ld: %r", len, n);
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exits(0);
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}
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