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26 7u83 1 
#include "os.h"
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#include <libsec.h>
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static char*
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readfile(char *name)
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{
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	int fd;
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	char *s;
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	Dir *d;
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	fd = open(name, OREAD);
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	if(fd < 0)
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		return nil;
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	if((d = dirfstat(fd)) == nil) {
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		close(fd);
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		return nil;
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	}
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	s = malloc(d->length + 1);
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	if(s == nil || readn(fd, s, d->length) != d->length){
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		free(s);
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		free(d);
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		close(fd);
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		return nil;
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	}
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	close(fd);
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	s[d->length] = '\0';
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	free(d);
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	return s;
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}
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uchar*
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readcert(char *filename, int *pcertlen)
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{
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	char *pem;
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	uchar *binary;
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	pem = readfile(filename);
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	if(pem == nil){
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		werrstr("can't read %s: %r", filename);
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		return nil;
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	}
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	binary = decodePEM(pem, "CERTIFICATE", pcertlen, nil);
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	free(pem);
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	if(binary == nil){
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		werrstr("can't parse %s", filename);
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		return nil;
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	}
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	return binary;
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}
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PEMChain *
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readcertchain(char *filename)
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{
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	char *chfile;
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	chfile = readfile(filename);
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	if (chfile == nil) {
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		werrstr("can't read %s: %r", filename);
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		return nil;
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	}
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	return decodepemchain(chfile, "CERTIFICATE");
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}
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