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-rw-r--r--src/lib/tls/tortls_openssl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/lib/tls/tortls_openssl.c b/src/lib/tls/tortls_openssl.c
index 2a022b8531..dc6c0bee9c 100644
--- a/src/lib/tls/tortls_openssl.c
+++ b/src/lib/tls/tortls_openssl.c
@@ -548,6 +548,12 @@ tor_tls_context_new(crypto_pk_t *identity, unsigned int key_lifetime,
if (!(result->ctx = SSL_CTX_new(SSLv23_method())))
goto error;
#endif /* defined(HAVE_TLS_METHOD) */
+
+#ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL
+ /* Level 1 re-enables RSA1024 and DH1024 for compatibility with old tors */
+ SSL_CTX_set_security_level(result->ctx, 1);
+#endif
+
SSL_CTX_set_options(result->ctx, SSL_OP_NO_SSLv2);
SSL_CTX_set_options(result->ctx, SSL_OP_NO_SSLv3);