[fix-auth-ct-eq] use consant time comparison for awsv4 signature verification
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1 changed files with 3 additions and 3 deletions
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@ -350,9 +350,9 @@ pub async fn verify_v4(
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)
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.ok_or_internal_error("Unable to build signing HMAC")?;
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hmac.update(payload);
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let our_signature = hex::encode(hmac.finalize().into_bytes());
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if signature != our_signature {
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return Err(Error::forbidden("Invalid signature".to_string()));
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let signature = hex::decode(&signature).map_err(|_| Error::forbidden("Invalid signature"))?;
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if hmac.verify_slice(&signature).is_err() {
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return Err(Error::forbidden("Invalid signature"));
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}
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Ok(key)
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