extmod/modtls: Move the native ssl module to tls.

The current `ssl` module has quite a few differences to the CPython
implementation.  This change moves the MicroPython variant to a new `tls`
module and provides a wrapper module for `ssl` (in micropython-lib).

Users who only rely on implemented comparible behavior can continue to use
`ssl`, while users that rely on non-compatible behavior should switch to
`tls`.  Then we can make the facade in `ssl` more strictly adhere to
CPython.

Signed-off-by: Felix Dörre <felix@dogcraft.de>

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/extmod/tls_sslcontext_ciphers.py b/tests/extmod/tls_sslcontext_ciphers.py
new file mode 100644
index 0000000000..43f94fb19a
--- /dev/null
+++ b/tests/extmod/tls_sslcontext_ciphers.py
@@ -0,0 +1,31 @@
+# Basic test of tls.SSLContext get_ciphers() and set_ciphers() methods.
+
+try:
+    import tls
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+
+ctx = tls.SSLContext(tls.PROTOCOL_TLS_CLIENT)
+
+ciphers = ctx.get_ciphers()
+
+for ci in ciphers:
+    # Only print those ciphers know to exist on all ports.
+    if ("TLS-ECDHE-ECDSA-WITH-AES" in ci or "TLS-RSA-WITH-AES" in ci) and "CBC" in ci:
+        print(ci)
+
+ctx.set_ciphers(ciphers[:1])
+
+# Test error cases.
+
+try:
+    ctx.set_ciphers(ciphers[0])
+except TypeError as e:
+    print(e)
+
+try:
+    ctx.set_ciphers(["BAR"])
+except OSError as e:
+    print(e)