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35 lines
710 B
35 lines
710 B
package crypto
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import (
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crand "crypto/rand"
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"encoding/hex"
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"io"
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)
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// This only uses the OS's randomness
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func randBytes(numBytes int) []byte {
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b := make([]byte, numBytes)
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_, err := crand.Read(b)
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if err != nil {
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panic(err)
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}
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return b
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}
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// This only uses the OS's randomness
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func CRandBytes(numBytes int) []byte {
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return randBytes(numBytes)
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}
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// CRandHex returns a hex encoded string that's floor(numDigits/2) * 2 long.
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//
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// Note: CRandHex(24) gives 96 bits of randomness that
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// are usually strong enough for most purposes.
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func CRandHex(numDigits int) string {
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return hex.EncodeToString(CRandBytes(numDigits / 2))
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}
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// Returns a crand.Reader.
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func CReader() io.Reader {
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return crand.Reader
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}
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