50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
package crypto
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import (
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"crypto/rand"
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"encoding/hex"
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"math/big"
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"sort"
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"strings"
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"github.com/lbryio/lbry.go/errors"
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"github.com/btcsuite/btcutil/base58"
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"golang.org/x/crypto/sha3"
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)
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// RandString returns a random alphanumeric string of a given length
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func RandString(length int) string {
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buf := make([]byte, length)
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_, err := rand.Reader.Read(buf)
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if err != nil {
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panic(errors.Err(err))
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}
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randStr := base58.Encode(buf)[:length]
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if len(randStr) < length {
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panic(errors.Err("Could not create random string that is long enough"))
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}
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return randStr
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}
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// Int returns a uniform random value in [0, max). It panics if max <= 0.
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func RandInt64(max int64) int64 {
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n, err := rand.Int(rand.Reader, big.NewInt(max))
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if err != nil {
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panic(err)
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}
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return n.Int64()
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}
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// HashStringSlice returns a hex hash of a slice of strings
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func HashStringSlice(data []string) string {
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return hex.EncodeToString(hashStringSliceRaw(data))
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}
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func hashStringSliceRaw(data []string) []byte {
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sort.Strings(data)
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hash := sha3.Sum256([]byte(strings.Join(data, "")))
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return hash[:]
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}
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