getsops/sops · error

duplicate part detected

Error message

duplicate part detected

What it means

Error "duplicate part detected" thrown in getsops/sops.

Source

Thrown at shamir/shamir.go:288

		}
	}

	// Create a buffer to store the reconstructed secret
	secret := make([]byte, firstPartLen-1)

	// Buffer to store the samples
	xSamples := make([]uint8, len(parts))
	ySamples := make([]uint8, len(parts))

	// Set the x value for each sample and ensure no x_sample values are the same,
	// otherwise div() can be unhappy
	// Check that we don't have any duplicate parts, that is, two or
	// more parts with the same x coordinate.
	checkMap := map[byte]bool{}
	for i, part := range parts {
		samp := part[firstPartLen-1]
		if exists := checkMap[samp]; exists {
			return nil, fmt.Errorf("duplicate part detected")
		}
		checkMap[samp] = true
		xSamples[i] = samp
	}

	// Reconstruct each byte
	for idx := range secret {
		// Set the y value for each sample
		for i, part := range parts {
			ySamples[i] = part[idx]
		}

		// Use Lagrange interpolation to retrieve the free term
		// of the original polynomial
		val := interpolatePolynomial(xSamples, ySamples, 0)

		// Evaluate the 0th value to get the intercept
		secret[idx] = val

View on GitHub (pinned to 13442bb981)

When it happens

Trigger: Thrown at shamir/shamir.go:288 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of getsops/sops@13442bb981 (2026-09-01). Data as JSON: /api/errors/d9aa72dc21d00936. Report an issue: GitHub.