From ad92184636f134b8fc6f3e897c55dd5b27bac560 Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Thu, 7 Aug 2014 15:26:58 +0200 Subject: ssl: Make sure the correct ROOT-cert is used When dealing with older certificates that does not indicate its signer with a certificate extension, we must search the database for the issure. Finding the issuer is not enough, we need to verify the signature with the key in the found issuer cert. --- lib/ssl/src/ssl_certificate.erl | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/lib/ssl/src/ssl_certificate.erl b/lib/ssl/src/ssl_certificate.erl index b186a1015a..53366b060c 100644 --- a/lib/ssl/src/ssl_certificate.erl +++ b/lib/ssl/src/ssl_certificate.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2007-2013. All Rights Reserved. +%% Copyright Ericsson AB 2007-2014 All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -232,7 +232,12 @@ find_issuer(OtpCert, CertDbHandle) -> IsIssuerFun = fun({_Key, {_Der, #'OTPCertificate'{} = ErlCertCandidate}}, Acc) -> case public_key:pkix_is_issuer(OtpCert, ErlCertCandidate) of true -> - throw(public_key:pkix_issuer_id(ErlCertCandidate, self)); + case verify_cert_signer(OtpCert, ErlCertCandidate#'OTPCertificate'.tbsCertificate) of + true -> + throw(public_key:pkix_issuer_id(ErlCertCandidate, self)); + false -> + Acc + end; false -> Acc end; @@ -254,3 +259,19 @@ is_valid_extkey_usage(KeyUse, client) -> is_valid_extkey_usage(KeyUse, server) -> %% Server wants to verify client is_valid_key_usage(KeyUse, ?'id-kp-clientAuth'). + +verify_cert_signer(OtpCert, SignerTBSCert) -> + PublicKey = public_key(SignerTBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo), + public_key:pkix_verify(public_key:pkix_encode('OTPCertificate', OtpCert, otp), PublicKey). + +public_key(#'OTPSubjectPublicKeyInfo'{algorithm = #'PublicKeyAlgorithm'{algorithm = ?'id-ecPublicKey', + parameters = Params}, + subjectPublicKey = Point}) -> + {Point, Params}; +public_key(#'OTPSubjectPublicKeyInfo'{algorithm = #'PublicKeyAlgorithm'{algorithm = ?'rsaEncryption'}, + subjectPublicKey = Key}) -> + Key; +public_key(#'OTPSubjectPublicKeyInfo'{algorithm = #'PublicKeyAlgorithm'{algorithm = ?'id-dsa', + parameters = {params, Params}}, + subjectPublicKey = Key}) -> + {Key, Params}. -- cgit v1.2.3