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Code Sample | Download Certificate
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Ranjith Venkatesh
Sep 15, 2010, 9:24:59 AM9/15/10
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Is it possible to download a certificate given the
website eg: https://domainX.com using
openssl functions?
If yes, what are relevant functions and relevant
code samples?
Wim Lewis
Sep 15, 2010, 2:18:19 PM9/15/10
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On Sep 15, 2010, at 6:24 AM, Ranjith Venkatesh wrote:
> Is it possible to download a certificate given the website eg: https://domainX.com using openssl functions?
> If yes, what are relevant functions and relevant code samples?
It's possible to do this using "openssl s_client -showcerts". You can see an example if you look at the source of the s_client command (apps/s_client.c) --- call SSL_get_peer_certificate() or SSL_get_peer_cert_chain(), then do what you want with the returned cert (e.g. PEM_write_bio_X509()).
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