diff options
Diffstat (limited to 'crypto/src/math/ec')
| -rw-r--r-- | crypto/src/math/ec/ECAlgorithms.cs | 5 | ||||
| -rw-r--r-- | crypto/src/math/ec/rfc8032/Ed25519.cs | 5 |
2 files changed, 8 insertions, 2 deletions
diff --git a/crypto/src/math/ec/ECAlgorithms.cs b/crypto/src/math/ec/ECAlgorithms.cs index fcfab06f7..3059ca3b3 100644 --- a/crypto/src/math/ec/ECAlgorithms.cs +++ b/crypto/src/math/ec/ECAlgorithms.cs @@ -216,7 +216,10 @@ namespace Org.BouncyCastle.Math.EC throw new ArgumentException("Point must be on the same curve", nameof(p)); #if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER - Span<byte> encoding = stackalloc byte[p.GetEncodedLength(false)]; + int encodedLength = p.GetEncodedLength(false); + Span<byte> encoding = encodedLength <= 512 + ? stackalloc byte[encodedLength] + : new byte[encodedLength]; p.EncodeTo(false, encoding); return c.DecodePoint(encoding); #else diff --git a/crypto/src/math/ec/rfc8032/Ed25519.cs b/crypto/src/math/ec/rfc8032/Ed25519.cs index d6bf461cf..f3b63f3b3 100644 --- a/crypto/src/math/ec/rfc8032/Ed25519.cs +++ b/crypto/src/math/ec/rfc8032/Ed25519.cs @@ -433,7 +433,10 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032 public static void GeneratePublicKey(ReadOnlySpan<byte> sk, Span<byte> pk) { IDigest d = CreateDigest(); - Span<byte> h = stackalloc byte[d.GetDigestSize()]; + int digestSize = d.GetDigestSize(); + Span<byte> h = digestSize <= 128 + ? stackalloc byte[digestSize] + : new byte[digestSize]; d.BlockUpdate(sk[..SecretKeySize]); d.DoFinal(h); |