82 lines
2.5 KiB
Python
82 lines
2.5 KiB
Python
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"""
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快速CRT提取测试 - 只测试一个PDF
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"""
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import pikepdf
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from cryptography.hazmat.primitives.serialization.pkcs7 import load_der_pkcs7_certificates
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from cryptography.x509.oid import NameOID
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pdf_path = "src/test/resources/data/pdfs/YDQ25_002294.pdf"
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print(f"Testing CRT extraction for: {pdf_path}")
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try:
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pdf = pikepdf.Pdf.open(pdf_path)
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acroform = pdf.Root.get("/AcroForm")
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if not acroform:
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print("ERROR: No /AcroForm found")
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exit(1)
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fields = acroform.get("/Fields", [])
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print(f"Found {len(fields)} fields")
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signatures = []
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for idx, field in enumerate(fields):
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field_obj = field
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if field_obj.get("/FT") != "/Sig":
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continue
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sig_dict = field_obj.get("/V")
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if not sig_dict:
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continue
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contents_obj = sig_dict.get("/Contents")
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if contents_obj is None:
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continue
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contents = bytes(contents_obj)
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print(f"\nSignature #{len(signatures)}:")
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print(f" Size: {len(contents)} bytes")
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# Try PKCS#7 parsing
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try:
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certs = load_der_pkcs7_certificates(contents)
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print(f" PKCS#7 parsing: SUCCESS ({len(certs)} certificates)")
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for cert_idx, cert in enumerate(certs):
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print(f" Certificate #{cert_idx}:")
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print(f" Subject: {cert.subject}")
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# Try to get organization name
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for oid in [NameOID.COMMON_NAME, NameOID.ORGANIZATION_NAME]:
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val = cert.subject.get_attributes_for_oid(oid)
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if val:
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print(f" {oid._name}: {val[0].value}")
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except Exception as e:
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print(f" PKCS#7 parsing: FAILED ({e})")
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# Try binary search fallback
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known_institutions = [
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"广东产品质量监督检验研究院",
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"广东产品质量监督检验",
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]
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for inst in known_institutions:
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encoded = inst.encode('utf-8')
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if encoded in contents:
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print(f" Binary search: FOUND '{inst}'")
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print(f" Position: {contents.find(encoded)}")
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break
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signatures.append(contents)
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if len(signatures) >= 3: # Only test first 3 signatures
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break
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print(f"\nTotal signatures tested: {len(signatures)}")
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except Exception as e:
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print(f"ERROR: {e}")
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import traceback
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traceback.print_exc()
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