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kandi X-RAY | scaler7Blog Summary
kandi X-RAY | scaler7Blog Summary
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QUESTION
I have an x509 certificate as a file/byte array that I'd like to use to verify the signature provided in a CertificateVerify
TLS message. I think I can use SecKeyVerifySignature
once I've determined the certificate's key algorithm (SecKeyAlgorithm
parameter) and initialized the signedData
from the transcript hash (concatenated to the context string, etc.).
openssl x509
reports the certificate's key like
ANSWER
Answered 2020-Apr-18 at 14:14I misunderstood my own goals.
The CertificateVerify
message provides a digest of the handshake up to that point. The server uses its certificate's private key to perform that signature. As indicated in the TLS 1.3 specification, the signature algorithm is part of the CertificateVerify structure
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