42 lines
1.6 KiB
Go
42 lines
1.6 KiB
Go
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// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package globals
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import mathrand "math/rand"
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import "crypto/rand"
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import "encoding/binary"
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// random source which is cryptographically secure
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// this is to be used in random sorting and selections where necessary
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type CryptoRandSource struct{}
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func NewCryptoRandSource() CryptoRandSource {
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return CryptoRandSource{}
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}
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func (_ CryptoRandSource) Int63() int64 {
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var b [8]byte
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rand.Read(b[:])
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// mask off sign bit to ensure positive number
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return int64(binary.LittleEndian.Uint64(b[:]) & (1<<63 - 1))
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}
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func (_ CryptoRandSource) Seed(_ int64) {}
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var Global_Random = mathrand.New(NewCryptoRandSource())
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