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Viewing changes to src/pkg/crypto/rand/rand_unix.go

  • Committer: Package Import Robot
  • Author(s): James Page
  • Date: 2013-08-20 14:06:23 UTC
  • mfrom: (14.1.23 saucy-proposed)
  • Revision ID: package-import@ubuntu.com-20130820140623-b414jfxi3m0qkmrq
Tags: 2:1.1.2-2ubuntu1
https://launchpad.net/bugs/1211749
https://launchpad.net/bugs/1202027
* Merge from Debian unstable (LP: #1211749, #1202027). Remaining changes:
  - 016-armhf-elf-header.patch: Use correct ELF header for armhf binaries.
  - d/control,control.cross: Update Breaks/Replaces for Ubuntu
    versions to ensure smooth upgrades, regenerate control file.

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src/pkg/crypto/rand/rand_unix.go
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin freebsd linux netbsd openbsd
 
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// +build darwin freebsd linux netbsd openbsd plan9
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// Unix cryptographically secure pseudorandom number
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// generator.
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        "crypto/cipher"
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        "io"
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        "os"
 
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        "runtime"
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        "sync"
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        "time"
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)
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// Easy implementation: read from /dev/urandom.
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// This is sufficient on Linux, OS X, and FreeBSD.
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func init() { Reader = &devReader{name: "/dev/urandom"} }
 
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func init() {
 
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        if runtime.GOOS == "plan9" {
 
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                Reader = newReader(nil)
 
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        } else {
 
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                Reader = &devReader{name: "/dev/urandom"}
 
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        }
 
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}
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// A devReader satisfies reads by reading the file named name.
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type devReader struct {
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                if f == nil {
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                        return 0, err
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                }
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                r.f = bufio.NewReader(f)
 
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                if runtime.GOOS == "plan9" {
 
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                        r.f = f
 
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                } else {
 
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                        r.f = bufio.NewReader(f)
 
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                }
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        }
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        return r.f.Read(b)
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}
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// Alternate pseudo-random implementation for use on
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// systems without a reliable /dev/urandom.  So far we
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// haven't needed it.
 
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// systems without a reliable /dev/urandom.
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// newReader returns a new pseudorandom generator that
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// seeds itself by reading from entropy.  If entropy == nil,