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allowing to use a known private key to generate the public key in the… #190

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allowing to use a known private key to generate the public key in the… #190

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11 changes: 6 additions & 5 deletions lib/key_generators/ec_key_generator.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -34,14 +34,15 @@ class ECKeyGenerator implements KeyGenerator {
}

@override
AsymmetricKeyPair generateKeyPair() {
AsymmetricKeyPair generateKeyPair({BigInt? d = null}) {
var n = _params.n;
var nBitLength = n.bitLength;
BigInt? d;

do {
d = _random.nextBigInteger(nBitLength);
} while (d == BigInt.zero || (d >= n));
if (d == null) {
do {
d = _random.nextBigInteger(nBitLength);
} while (d == BigInt.zero || (d >= n));
}

var Q = _params.G * d;

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2 changes: 1 addition & 1 deletion lib/key_generators/rsa_key_generator.dart
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Expand Up @@ -41,7 +41,7 @@ class RSAKeyGenerator implements KeyGenerator {
}

@override
AsymmetricKeyPair generateKeyPair() {
AsymmetricKeyPair generateKeyPair({BigInt? d = null}) {
BigInt p, q, n, e;

// p and q values should have a length of half the strength in bits
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2 changes: 1 addition & 1 deletion lib/src/api/key_generator.dart
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Expand Up @@ -15,5 +15,5 @@ abstract class KeyGenerator extends Algorithm {
void init(CipherParameters params);

/// Generate a key pair.
AsymmetricKeyPair generateKeyPair();
AsymmetricKeyPair generateKeyPair({BigInt? d = null});
}