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Code Issues Releases Wiki Activity

BIP375: validate PSBT_OUT_SP_V0_LABEL length

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wangjingshuiku
2026-09-12 17:00:00 +08:00
parent bfc142f2b5
commit 7ccde10a3c
3 changed files with 18 additions and 0 deletions
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3
bip-0375.mediawiki
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@@ -274,6 +274,9 @@ Use the provided [[bip-0375/test_runner.py|test runner]] to validate each test v
| missing PSBT_OUT_SP_V0_INFO field when PSBT_OUT_SP_V0_LABEL set | missing PSBT_OUT_SP_V0_INFO field when PSBT_OUT_SP_V0_LABEL set
|- |-
| PSBT Structure | PSBT Structure
| incorrect byte length for PSBT_OUT_SP_V0_LABEL field
|-
| PSBT Structure
| incorrect byte length for PSBT_OUT_SP_V0_INFO field | incorrect byte length for PSBT_OUT_SP_V0_INFO field
|- |-
| PSBT Structure | PSBT Structure

5
bip-0375/bip375_test_vectors.json
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@@ -13,6 +13,11 @@
"psbt": "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", "psbt": "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",
"supplementary": {} "supplementary": {}
}, },
{
"description": "psbt structure: incorrect byte length for PSBT_OUT_SP_V0_LABEL field",
"psbt": "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",
"supplementary": {}
},
{ {
"description": "psbt structure: incorrect byte length for PSBT_OUT_SP_V0_INFO field", "description": "psbt structure: incorrect byte length for PSBT_OUT_SP_V0_INFO field",
"psbt": "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", "psbt": "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",

10
bip-0375/validator/validate_psbt.py
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@@ -46,6 +46,7 @@ def validate_psbt_structure(psbt: PSBT) -> Tuple[bool, str]:
Checks: Checks:
- Each output must have PSBT_OUT_SCRIPT or PSBT_OUT_SP_V0_INFO - Each output must have PSBT_OUT_SCRIPT or PSBT_OUT_SP_V0_INFO
- PSBT_OUT_SP_V0_LABEL requires PSBT_OUT_SP_V0_INFO - PSBT_OUT_SP_V0_LABEL requires PSBT_OUT_SP_V0_INFO
- SP_V0_LABEL must be 4 bytes (32-bit little-endian uint)
- SP_V0_INFO must be 66 bytes (33-byte scan key + 33-byte spend key) - SP_V0_INFO must be 66 bytes (33-byte scan key + 33-byte spend key)
- ECDH shares must be 33 bytes - ECDH shares must be 33 bytes
- DLEQ proofs must be 64 bytes - DLEQ proofs must be 64 bytes
@@ -73,6 +74,15 @@ def validate_psbt_structure(psbt: PSBT) -> Tuple[bool, str]:
f"Output {i} has PSBT_OUT_SP_V0_LABEL but missing PSBT_OUT_SP_V0_INFO", f"Output {i} has PSBT_OUT_SP_V0_LABEL but missing PSBT_OUT_SP_V0_INFO",
) )
# Validate SP_V0_LABEL field length
if has_sp_label:
sp_label = output_map[PSBT_OUT_SP_V0_LABEL]
if len(sp_label) != 4:
return (
False,
f"Output {i} PSBT_OUT_SP_V0_LABEL has wrong length ({len(sp_label)} bytes, expected 4)",
)
# Validate SP_V0_INFO field length # Validate SP_V0_INFO field length
if has_sp_info: if has_sp_info:
sp_info = output_map[PSBT_OUT_SP_V0_INFO] sp_info = output_map[PSBT_OUT_SP_V0_INFO]