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Loop-in and loop-out responses carry compressed server public keys that are copied into fixed-size fields and later used for HTLC construction. Validate the length and parse each compressed key before storing it, and validate the MuSig2 loop-in receiver internal key as well. This turns short or unparsable server keys into explicit errors instead of silently zero-padding short responses or accepting an invalid internal key. Update root test mocks to return size-correct MuSig2 signing data under the stricter checks.
28 lines
801 B
Go
28 lines
801 B
Go
package loop
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import (
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"testing"
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looptest "github.com/lightninglabs/loop/test"
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"github.com/stretchr/testify/require"
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)
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// TestParseServerPubKey ensures that parseServerPubKey accepts a valid
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// compressed public key and rejects keys with an invalid length or contents.
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func TestParseServerPubKey(t *testing.T) {
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t.Parallel()
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_, pubKey := looptest.CreateKey(1)
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pubKeyBytes := pubKey.SerializeCompressed()
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parsedKey, err := parseServerPubKey("test key", pubKeyBytes)
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require.NoError(t, err)
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require.Equal(t, pubKeyBytes, parsedKey[:])
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_, err = parseServerPubKey("test key", pubKeyBytes[:32])
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require.ErrorContains(t, err, "invalid test key length")
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invalidKey := make([]byte, 33)
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_, err = parseServerPubKey("test key", invalidKey)
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require.ErrorContains(t, err, "invalid test key")
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}
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