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--- imap/tls.c.orig 2018-10-08 02:05:33 UTC
+++ imap/tls.c
@@ -726,7 +726,9 @@ EXPORTED int tls_init_serverengine(c
off |= SSL_OP_ALL; /* Work around all known bugs */
off |= SSL_OP_NO_SSLv2; /* Disable insecure SSLv2 */
off |= SSL_OP_NO_SSLv3; /* Disable insecure SSLv3 */
+#if (OPENSSL_VERSION_NUMBER >= 0x1000000fL)
off |= SSL_OP_NO_COMPRESSION; /* Disable TLS compression */
+#endif // (OPENSSL_VERSION_NUMBER >= 0x1000000fL)
const char *tls_versions = config_getstring(IMAPOPT_TLS_VERSIONS);
@@ -1452,7 +1454,9 @@ HIDDEN int tls_init_clientengine(int ver
off |= SSL_OP_ALL; /* Work around all known bugs */
off |= SSL_OP_NO_SSLv2; /* Disable insecure SSLv2 */
off |= SSL_OP_NO_SSLv3; /* Disable insecure SSLv3 */
+#if (OPENSSL_VERSION_NUMBER >= 0x1000000fL)
off |= SSL_OP_NO_COMPRESSION; /* Disable TLS compression */
+#endif // (OPENSSL_VERSION_NUMBER >= 0x1000000fL)
SSL_CTX_set_options(c_ctx, off);
SSL_CTX_set_info_callback(c_ctx, apps_ssl_info_callback);
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