diff options
| -rw-r--r-- | crypto/src/crypto/macs/HMac.cs | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/crypto/src/crypto/macs/HMac.cs b/crypto/src/crypto/macs/HMac.cs index 3445a945b..03e2212d6 100644 --- a/crypto/src/crypto/macs/HMac.cs +++ b/crypto/src/crypto/macs/HMac.cs @@ -26,10 +26,18 @@ namespace Org.BouncyCastle.Crypto.Macs private readonly byte[] outputBuf; public HMac(IDigest digest) + : this(digest, digest.GetByteLength()) { + } + + public HMac(IDigest digest, int blockLength) + { + if (blockLength < 16) + throw new ArgumentException("must be at least 16 bytes", nameof(blockLength)); + this.digest = digest; this.digestSize = digest.GetDigestSize(); - this.blockLength = digest.GetByteLength(); + this.blockLength = blockLength; this.inputPad = new byte[blockLength]; this.outputBuf = new byte[blockLength + digestSize]; } |