upstream: ban empty namespace strings for s
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@ -1,4 +1,4 @@
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/* $OpenBSD: ssh-keygen.c,v 1.352 2019/09/29 16:31:57 jmc Exp $ */
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/* $OpenBSD: ssh-keygen.c,v 1.353 2019/10/02 08:05:50 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -3030,7 +3030,7 @@ main(int argc, char **argv)
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argc -= optind;
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if (sign_op != NULL) {
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if (cert_principals == NULL) {
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if (cert_principals == NULL && *cert_principals == '\0') {
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error("Too few arguments for sign/verify: "
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"missing namespace");
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exit(1);
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