New test with a server offering both RSA+ECDSA certificates.

This requires dovecot-imapd 2.2.31 or later.

Certificate generated with:

      $ openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-256 -pkeyopt ec_param_enc:named_curve \
            -out tests/snippets/dovecot/dovecot.ecdsa.key
      $ openssl req -x509 -days 3650 -subj "/CN=InterIMAP test suite" \
            -key tests/snippets/dovecot/dovecot.ecdsa.key \
            -out tests/snippets/dovecot/dovecot.ecdsa.crt

1 files changed, 49 insertions, 0 deletions

diff --git a/tests/tls-rsa+ecdsa/t b/tests/tls-rsa+ecdsa/t
new file mode 100644
index 0000000..29352e9
--- /dev/null
+++ b/tests/tls-rsa+ecdsa/t
@@ -0,0 +1,49 @@
+doveconf_remote() {
+    doveconf -c "$HOME_remote/.dovecot/config" -hx "$1"
+}
+pkey_sha256() {
+    openssl x509 -pubkey | openssl pkey -pubin -outform DER \
+    | openssl dgst -sha256 | sed -rn "/^.*=\\s*/ {s///p;q}"
+}
+x509_sha256() {
+    openssl x509 -noout -fingerprint -sha256 \
+    | sed -rn "/^.*=\\s*/ {s///p;q}" | tr -d : | tr "[A-Z]" "[a-z]"
+}
+
+PKEY_SHA256="$(doveconf_remote ssl_cert | pkey_sha256)"
+X509_SHA256="$(doveconf_remote ssl_cert | x509_sha256)"
+PKEY_ALT_SHA256="$(doveconf_remote ssl_alt_cert | pkey_sha256)"
+X509_ALT_SHA256="$(doveconf_remote ssl_alt_cert | x509_sha256)"
+
+# pinned valid fingerprints
+cat >>"$XDG_CONFIG_HOME/interimap/config" <<-EOF
+	SSL_fingerprint = sha256\$$PKEY_SHA256 sha256\$$PKEY_ALT_SHA256
+EOF
+
+for ((i = 0; i < 32; i++)); do
+    u="$(shuf -n1 -e "local" "remote")"
+    sample_message | deliver -u "$u"
+done
+interimap_init
+check_mailbox_status "INBOX"
+
+interimap --debug || error
+# which peer certificate is used is up to libssl 
+grep -Fx -e "remote: Peer certificate fingerprint: sha256\$$X509_SHA256" \
+         -e "remote: Peer certificate fingerprint: sha256\$$X509_ALT_SHA256" \
+         <"$STDERR" || error
+
+# force RSA (XXX do we really have to force TLSv1.2 here?)
+cat >>"$XDG_CONFIG_HOME/interimap/config" <<-EOF
+	SSL_protocols = TLSv1.2
+	SSL_cipherlist = EECDH+AESGCM+aRSA
+EOF
+interimap --debug || error
+grep -Fx "remote: Peer certificate fingerprint: sha256\$$X509_SHA256" <"$STDERR" || error
+
+# force ECDSA
+sed -i "s/^SSL_cipherlist\\s*=.*/SSL_cipherlist = EECDH+AESGCM+aECDSA/" "$XDG_CONFIG_HOME/interimap/config"
+interimap --debug || error
+grep -Fx "remote: Peer certificate fingerprint: sha256\$$X509_ALT_SHA256" <"$STDERR" || error
+
+# vim: set filetype=sh :