From a1ef66a76b4a6651b7371a9fd1e35f2f99e85bfa Mon Sep 17 00:00:00 2001 From: Guilhem Moulin Date: Wed, 9 Dec 2020 15:06:37 +0100 Subject: libinterimap: SSL_fingerprint now supports a space-separate list of digests to pin. And succeeds if, and only if, the peer certificate SPKI matches one of the pinned digest values. Specifying multiple digest values can key useful in key rollover scenarios and/or when the server supports certificates of different types (for instance RSA+ECDSA). --- tests/tls-pin-fingerprint/t | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) (limited to 'tests') diff --git a/tests/tls-pin-fingerprint/t b/tests/tls-pin-fingerprint/t index 612bc44..d3830e2 100644 --- a/tests/tls-pin-fingerprint/t +++ b/tests/tls-pin-fingerprint/t @@ -1,6 +1,8 @@ PKEY_SHA256="$(doveconf -c "$HOME_remote/.dovecot/config" -hx ssl_cert \ | openssl x509 -pubkey | openssl pkey -pubin -outform DER \ | openssl dgst -sha256 | sed -rn "/^.*=\\s*/ {s///p;q}")" +INVALID_FPR="sha256\$deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef" +INVALID_FPR2="sha256\$deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbee2" # backup config install -m0600 "$XDG_CONFIG_HOME/interimap/config" "$XDG_CONFIG_HOME/interimap/config~" @@ -22,9 +24,28 @@ interimap_init check_mailbox_status "INBOX" +# with default algorithm (SHA256) +with_remote_config <<-EOF + SSL_fingerprint = $INVALID_FPR $PKEY_SHA256 +EOF +interimap || error + + # and now an invalid one with_remote_config <<-EOF - SSL_fingerprint = sha256\$deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef + SSL_fingerprint = $INVALID_FPR +EOF +! interimap --debug || error + +grep -Fx "remote: ERROR: Can't initiate TLS/SSL handshake" <"$STDERR" || error +grep -Fx "remote: WARNING: Fingerprint doesn't match! MiTM in action?" <"$STDERR" || error +grep -Fx "remote: ERROR: Can't initiate TLS/SSL handshake" <"$STDERR" || error +# make sure we didn't send any credentials +! grep -E "^remote: C: .* (AUTHENTICATE|LOGIN) " <"$STDERR" || error + +# two invalid ones +with_remote_config <<-EOF + SSL_fingerprint = $INVALID_FPR $INVALID_FPR2 EOF ! interimap --debug || error @@ -34,4 +55,18 @@ grep -Fx "remote: ERROR: Can't initiate TLS/SSL handshake" <"$STDERR" || error # make sure we didn't send any credentials ! grep -E "^remote: C: .* (AUTHENTICATE|LOGIN) " <"$STDERR" || error + +# valid + invalid +with_remote_config <<-EOF + SSL_fingerprint = sha256\$$PKEY_SHA256 $INVALID_FPR +EOF +interimap || error + + +# invalid + valid +with_remote_config <<-EOF + SSL_fingerprint = $INVALID_FPR sha256\$$PKEY_SHA256 +EOF +interimap || error + # vim: set filetype=sh : -- cgit v1.2.3