Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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43 lines
1.4 KiB
43 lines
1.4 KiB
// Copyright (c) 2016, Google Inc. |
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// |
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// Permission to use, copy, modify, and/or distribute this software for any |
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// purpose with or without fee is hereby granted, provided that the above |
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// copyright notice and this permission notice appear in all copies. |
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// |
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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package runner |
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import ( |
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"encoding/binary" |
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"golang.org/x/crypto/chacha20" |
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) |
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// Use a different key from crypto/rand/deterministic.c. |
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var deterministicRandKey = []byte("runner deterministic key 0123456") |
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type deterministicRand struct { |
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numCalls uint64 |
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} |
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func (d *deterministicRand) Read(buf []byte) (int, error) { |
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for i := range buf { |
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buf[i] = 0 |
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} |
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var nonce [12]byte |
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binary.LittleEndian.PutUint64(nonce[:8], d.numCalls) |
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cipher, err := chacha20.NewUnauthenticatedCipher(deterministicRandKey, nonce[:]) |
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if err != nil { |
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return 0, err |
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} |
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cipher.XORKeyStream(buf, buf) |
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d.numCalls++ |
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return len(buf), nil |
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}
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