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crypto/core/primes.go

@@ -1,42 +0,0 @@
-//
-// Copyright Coinbase, Inc. All Rights Reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-package core
-
-import (
-	"crypto/rand"
-	"fmt"
-	"math"
-	"math/big"
-)
-
-// GenerateSafePrime creates a prime number `p`
-// where (`p`-1)/2 is also prime with at least `bits`
-func GenerateSafePrime(bits uint) (*big.Int, error) {
-	if bits < 3 {
-		return nil, fmt.Errorf("safe prime size must be at least 3-bits")
-	}
-
-	var p *big.Int
-	var err error
-	checks := int(math.Max(float64(bits)/16, 8))
-	for {
-		// rand.Prime throws an error if bits < 2
-		// -1 so the Sophie-Germain prime is 1023 bits
-		// and the Safe prime is 1024
-		p, err = rand.Prime(rand.Reader, int(bits)-1)
-		if err != nil {
-			return nil, err
-		}
-		p.Add(p.Lsh(p, 1), One)
-
-		if p.ProbablyPrime(checks) {
-			break
-		}
-	}
-
-	return p, nil
-}