问题
When I used openssl APIs to validate server certificate (self signed), I got following error :
error 19 at 1 depth lookup:self signed certificate in certificate chain
As per openssl documentation, this error (19) is
"X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: self signed certificate in certificate chain - the certificate chain could be built up using the untrusted certificates but the root could not be found locally."
Why this error occurs ? Any problems with my server certificate ?
回答1:
You have a certificate which is self-signed, so it's non-trusted by default, that's why OpenSSL complains. This warning is actually a good thing, because this scenario might also rise due to a man-in-the-middle attack.
To solve this, you'll need to install it as a trusted server. If it's signed by a non-trusted CA, you'll have to install that CA's certificate as well.
Have a look at this link about installing self-signed certificates.
回答2:
Here is one-liner to verify certificate chain:
openssl verify -verbose -x509_strict -CAfile ca.pem cert_chain.pem
This doesn't require to install CA anywhere.
See How does an SSL certificate chain bundle work? for details.
回答3:
If you're running Charles and trying to build a docker container then you'll most likely get this error.
Make sure to disable Charles (macos) proxy under proxy -> macOS proxy
Charles is an
HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP and SSL / HTTPS traffic between their machine and the Internet.
So anything similar may cause the same issue.
回答4:
The solution for the error is to add this line at the top of the code:
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
来源：https://stackoverflow.com/questions/12180552/openssl-error-self-signed-certificate-in-certificate-chain