48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
/*
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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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https://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 secret
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import (
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crypto "crypto/rand"
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"encoding/binary"
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"math/rand"
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"opendev.org/airship/airshipctl/pkg/log"
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)
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// Source implements rand.Source
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type Source struct{}
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var _ rand.Source = &Source{}
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// Uint64 returns a secure random uint64 in the range [0, 1<<64]. It will fail
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// if an error is returned from the system's secure random number generator
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func (s *Source) Uint64() uint64 {
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var value uint64
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err := binary.Read(crypto.Reader, binary.BigEndian, &value)
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if err != nil {
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log.Fatalf("could not generate a random number: %s", err.Error())
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}
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return value
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}
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// Int63 returns a secure random int64 in the range [0, 1<<63]
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func (s *Source) Int63() int64 {
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return int64(s.Uint64() & ^(uint64(1 << 63)))
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}
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// Seed does nothing, since Source will use the crypto library
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func (s *Source) Seed(_ int64) {}
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