### Custom Algorithms (SFTP)

Custom algorithms can be specified via command line parameters.
Algorithms are comma separated. 
Note that valid values does not in all cases represent default values.

`--sftp=pub-key-algos=...` specifies the supported client public key
authentication algorithms. Note that this doesn't include certificate types
since those use the underlying algorithm. This list is sent to the client if

		if err != nil {
			bugLogIf(ctx, err)
			return nil
		}
		return out
	}
}

func bytesToPublicKey(pub []byte) (*rsa.PublicKey, error) {
	block, _ := pem.Decode(pub)
	if block != nil {
		pub = block.Bytes
	}
	key, err := x509.ParsePKCS1PublicKey(pub)
	if err != nil {
		return nil, err
	}
	return key, nil
}

			}
			publicIP = host
		case "ssh-private-key":
			sshPrivateKey = tokens[1]
		case "pub-key-algos":
			allowPubKeys = filterAlgos(arg, strings.Split(tokens[1], ","), supportedPubKeyAuthAlgos)
		case "kex-algos":
			allowKexAlgos = filterAlgos(arg, strings.Split(tokens[1], ","), supportedKexAlgos)

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// protection : 2015-04-23 XYZ.COM LLC
protection

// pru : 2015-07-30 Prudential Financial, Inc.
pru

// prudential : 2015-07-30 Prudential Financial, Inc.
prudential

// pub : 2013-12-12 Dog Beach, LLC
pub

// pwc : 2015-10-29 PricewaterhouseCoopers LLP
pwc

// qpon : 2013-11-14 dotQPON LLC
qpon

// quebec : 2013-12-19 PointQuébec Inc
quebec

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        .addHeader("icy-description:Rock")
        .addHeader("icy-genre:riders")
        .addHeader("icy-name:A2RRock")
        .addHeader("icy-pub:1")
        .addHeader("icy-url:http://www.A2Rradio.com")
        .addHeader("Server: Icecast 2.3.3-kh8")
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