github.com/liujq9674git/golang-src-1.7@v0.0.0-20230517174348-17f6ec47f3f8/src/crypto/x509/root_darwin_test.go (about)

     1  // Copyright 2013 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package x509
     6  
     7  import (
     8  	"runtime"
     9  	"testing"
    10  	"time"
    11  )
    12  
    13  func TestSystemRoots(t *testing.T) {
    14  	switch runtime.GOARCH {
    15  	case "arm", "arm64":
    16  		t.Skipf("skipping on %s/%s, no system root", runtime.GOOS, runtime.GOARCH)
    17  	}
    18  
    19  	t0 := time.Now()
    20  	sysRoots := systemRootsPool() // actual system roots
    21  	sysRootsDuration := time.Since(t0)
    22  
    23  	t1 := time.Now()
    24  	execRoots, err := execSecurityRoots() // non-cgo roots
    25  	execSysRootsDuration := time.Since(t1)
    26  
    27  	if err != nil {
    28  		t.Fatalf("failed to read system roots: %v", err)
    29  	}
    30  
    31  	t.Logf("    cgo sys roots: %v", sysRootsDuration)
    32  	t.Logf("non-cgo sys roots: %v", execSysRootsDuration)
    33  
    34  	for _, tt := range []*CertPool{sysRoots, execRoots} {
    35  		if tt == nil {
    36  			t.Fatal("no system roots")
    37  		}
    38  		// On Mavericks, there are 212 bundled certs; require only
    39  		// 150 here, since this is just a sanity check, and the
    40  		// exact number will vary over time.
    41  		t.Logf("got %d roots", len(tt.certs))
    42  		if want, have := 150, len(tt.certs); have < want {
    43  			t.Fatalf("want at least %d system roots, have %d", want, have)
    44  		}
    45  	}
    46  
    47  	// Check that the two cert pools are roughly the same;
    48  	// |A∩B| > max(|A|, |B|) / 2 should be a reasonably robust check.
    49  
    50  	isect := make(map[string]bool, len(sysRoots.certs))
    51  	for _, c := range sysRoots.certs {
    52  		isect[string(c.Raw)] = true
    53  	}
    54  
    55  	have := 0
    56  	for _, c := range execRoots.certs {
    57  		if isect[string(c.Raw)] {
    58  			have++
    59  		}
    60  	}
    61  
    62  	var want int
    63  	if nsys, nexec := len(sysRoots.certs), len(execRoots.certs); nsys > nexec {
    64  		want = nsys / 2
    65  	} else {
    66  		want = nexec / 2
    67  	}
    68  
    69  	if have < want {
    70  		t.Errorf("insufficient overlap between cgo and non-cgo roots; want at least %d, have %d", want, have)
    71  	}
    72  }