diff options
Diffstat (limited to 'libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/ec/ECUtil.java')
-rw-r--r-- | libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/ec/ECUtil.java | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/ec/ECUtil.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/ec/ECUtil.java new file mode 100644 index 000000000..00f9a2b79 --- /dev/null +++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/ec/ECUtil.java @@ -0,0 +1,22 @@ +package org.spongycastle.crypto.ec; + +import java.math.BigInteger; +import java.security.SecureRandom; + +import org.spongycastle.math.ec.ECConstants; + +class ECUtil +{ + static BigInteger generateK(BigInteger n, SecureRandom random) + { + int nBitLength = n.bitLength(); + BigInteger k = new BigInteger(nBitLength, random); + + while (k.equals(ECConstants.ZERO) || (k.compareTo(n) >= 0)) + { + k = new BigInteger(nBitLength, random); + } + + return k; + } +} |