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crypto/x509: add example of using a custom root list.
Fixes golang#6267. LGTM=r, josharian R=golang-codereviews, josharian, r CC=golang-codereviews https://golang.org/cl/61020043
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// Copyright 2014 The Go Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style | ||
// license that can be found in the LICENSE file. | ||
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package tls_test | ||
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import ( | ||
"crypto/tls" | ||
"crypto/x509" | ||
) | ||
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func ExampleDial() { | ||
// Connecting with a custom root-certificate set. | ||
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const rootPEM = ` | ||
-----BEGIN CERTIFICATE----- | ||
MIIEBDCCAuygAwIBAgIDAjppMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT | ||
MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i | ||
YWwgQ0EwHhcNMTMwNDA1MTUxNTU1WhcNMTUwNDA0MTUxNTU1WjBJMQswCQYDVQQG | ||
EwJVUzETMBEGA1UEChMKR29vZ2xlIEluYzElMCMGA1UEAxMcR29vZ2xlIEludGVy | ||
bmV0IEF1dGhvcml0eSBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB | ||
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qwVkDBF9qn1luMrMTjAdBgNVHQ4EFgQUSt0GFhu89mi1dvWBtrtiGrpagS8wEgYD | ||
VR0TAQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAQYwOgYDVR0fBDMwMTAvoC2g | ||
K4YpaHR0cDovL2NybC5nZW90cnVzdC5jb20vY3Jscy9ndGdsb2JhbC5jcmwwPQYI | ||
KwYBBQUHAQEEMTAvMC0GCCsGAQUFBzABhiFodHRwOi8vZ3RnbG9iYWwtb2NzcC5n | ||
ZW90cnVzdC5jb20wFwYDVR0gBBAwDjAMBgorBgEEAdZ5AgUBMA0GCSqGSIb3DQEB | ||
BQUAA4IBAQA21waAESetKhSbOHezI6B1WLuxfoNCunLaHtiONgaX4PCVOzf9G0JY | ||
/iLIa704XtE7JW4S615ndkZAkNoUyHgN7ZVm2o6Gb4ChulYylYbc3GrKBIxbf/a/ | ||
zG+FA1jDaFETzf3I93k9mTXwVqO94FntT0QJo544evZG0R0SnU++0ED8Vf4GXjza | ||
HFa9llF7b1cq26KqltyMdMKVvvBulRP/F/A8rLIQjcxz++iPAsbw+zOzlTvjwsto | ||
WHPbqCRiOwY1nQ2pM714A5AuTHhdUDqB1O6gyHA43LL5Z/qHQF1hwFGPa4NrzQU6 | ||
yuGnBXj8ytqU0CwIPX4WecigUCAkVDNx | ||
-----END CERTIFICATE-----` | ||
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// First, create the set of root certificates. For this example we only | ||
// have one. It's also possible to omit this in order to use the | ||
// default root set of the current operating system. | ||
roots := x509.NewCertPool() | ||
ok := roots.AppendCertsFromPEM([]byte(rootPEM)) | ||
if !ok { | ||
panic("failed to parse root certificate") | ||
} | ||
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conn, err := tls.Dial("tcp", "mail.google.com:443", &tls.Config{ | ||
RootCAs: roots, | ||
}) | ||
if err != nil { | ||
panic("failed to connect: " + err.Error()) | ||
} | ||
conn.Close() | ||
} |