d8b68e3ccc
From golangci-lint: > SA1019: rand.Read has been deprecated since Go 1.20 because it >shouldn't be used: For almost all use cases, crypto/rand.Read is more >appropriate. (staticcheck) > SA1019: rand.Seed has been deprecated since Go 1.20 and an alternative >has been available since Go 1.0: Programs that call Seed and then expect >a specific sequence of results from the global random source (using >functions such as Int) can be broken when a dependency changes how >much it consumes from the global random source. To avoid such breakages, >programs that need a specific result sequence should use >NewRand(NewSource(seed)) to obtain a random generator that other >packages cannot access. (staticcheck) See also: - https://pkg.go.dev/math/rand@go1.20#Read - https://pkg.go.dev/math/rand@go1.20#Seed Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package seed provides an initializer for the global [math/rand] seed.
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//
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// Deprecated: Do not rely on the global seed.
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package seed
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import (
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"math/rand"
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"time"
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)
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// WithTimeAndRand seeds the global math rand generator with nanoseconds
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// XOR'ed with a crypto component if available for uniqueness.
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//
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// Deprecated: Do not rely on the global seed.
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func WithTimeAndRand() {
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var (
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b [4]byte
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u int64
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)
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tryReadRandom(b[:])
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// Set higher 32 bits, bottom 32 will be set with nanos
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u |= (int64(b[0]) << 56) | (int64(b[1]) << 48) | (int64(b[2]) << 40) | (int64(b[3]) << 32)
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rand.Seed(u ^ time.Now().UnixNano())
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}
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