peass-ng/PEASS-ng · error · MemoableResetException

digestLength inappropriate in other

Error message

digestLength inappropriate in other

What it means

Reset(IMemoable) restores state from another Sha512tDigest instance. The library throws MemoableResetException when the other digest was constructed with a different bitLength (digestLength), because its internal state is incompatible with this instance.

Source

Thrown at winPEAS/winPEASexe/winPEAS/3rdParty/BouncyCastle/crypto/digests/Sha512tDigest.cs:182

            while (--num >= 0)
            {
                int shift = 8 * (3 - num);
                bs[off + num] = (byte)(n >> shift);
            }
        }

		public override IMemoable Copy()
		{
			return new Sha512tDigest(this);
		}

		public override void Reset(IMemoable other)
		{
			Sha512tDigest t = (Sha512tDigest)other;

			if (this.digestLength != t.digestLength)
			{
				throw new MemoableResetException("digestLength inappropriate in other");
			}

			base.CopyIn(t);

			this.H1t = t.H1t;
			this.H2t = t.H2t;
			this.H3t = t.H3t;
			this.H4t = t.H4t;
			this.H5t = t.H5t;
			this.H6t = t.H6t;
			this.H7t = t.H7t;
			this.H8t = t.H8t;
		}

	}
}

View on GitHub (pinned to 53fb989abc)

Solutions

1. Ensure both digests were constructed with the same bitLength before Reset.
2. Create a fresh Sha512tDigest with the other's bitLength instead of resetting.
3. Centralize digest construction so all instances share one configured size.

Example fix

// before
if (digest.DigestSize != other.DigestSize) { /* mismatch still reset */ }
digest.Reset(other);
// after
if (digest.DigestSize == other.DigestSize)
{
    digest.Reset(other);
}
else
{
    digest = new Sha512tDigest(((Sha512tDigest)other).DigestSize * 8);
}

if (this.digestLength != otherDigest.DigestSize) throw new InvalidOperationException("Digest sizes differ; cannot Reset");

bool CanResetFrom(Sha512tDigest target, Sha512tDigest other) => target.DigestSize == other.DigestSize;

try { digest.Reset(other); }
catch (MemoableResetException) { digest = new Sha512tDigest(other.DigestSize * 8); digest.Reset(other); }

When it happens

Trigger: Calling digest.Reset(otherDigest) or the copy constructor where other was created as new Sha512tDigest(256) and this as new Sha512tDigest(224).

Common situations: Pooling or caching digests of mixed configurations; restoring memoized state after the application changed the configured output size.

Related errors

• Incompatible parameters in provided SkeinEngine.
• cannot be >= 512
• needs to be a multiple of 8
• cannot be 384 use SHA384 instead
• baseDigest

AI-assisted analysis of peass-ng/PEASS-ng@53fb989abc (2026-09-02). Data as JSON: /api/errors/8533ce05f26e6a20. Report an issue: GitHub.