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Check the binding of the server certificate with the sgx quote #679

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Merged
henrysun007 merged 1 commit into from
Mar 23, 2023
Merged

Check the binding of the server certificate with the sgx quote #679

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15 changes: 15 additions & 0 deletions sdk/python/teaclave.py
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,21 @@ def load_certificates(pem_bytes):
quote = report['isvEnclaveQuoteBody']
quote = base64.b64decode(quote)

# get report_data from the quote
report_data = quote[368:368 + 64]
# get EC pub key from the certificate
pub_key = cert.public_key().public_bytes(
cryptography.hazmat.primitives.serialization.Encoding.X962,
cryptography.hazmat.primitives.serialization.PublicFormat.
UncompressedPoint)

# verify whether the certificate is bound to the quote
assert (pub_key[0] == 4)
if pub_key[1:] != report_data:
raise TeaclaveException(
"Failed to verify the certificate agaist the report data in the quote"
)

# get mr_enclave and mr_signer from the quote
mr_enclave = quote[112:112 + 32].hex()
mr_signer = quote[176:176 + 32].hex()
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