From 6015cefb1b2cfde4b4850121c42405275e5e77d9 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Thu, 28 Jun 2018 23:24:21 +0200 Subject: openssl: make the requested TLS version the *minimum* wanted The code treated the set version as the *exact* version to require in the TLS handshake, which is not what other TLS backends do and probably not what most people expect either. Reported-by: Andreas Olsson Assisted-by: Gaurav Malhotra Fixes #2691 Closes #2694 --- lib/vtls/openssl.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) (limited to 'lib') diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c index 225b4cbd1..fc2e4ac08 100644 --- a/lib/vtls/openssl.c +++ b/lib/vtls/openssl.c @@ -2078,10 +2078,6 @@ set_ssl_version_min_max(long *ctx_options, struct connectdata *conn, long ssl_version = SSL_CONN_CONFIG(version); long ssl_version_max = SSL_CONN_CONFIG(version_max); - if(ssl_version_max == CURL_SSLVERSION_MAX_NONE) { - ssl_version_max = ssl_version << 16; - } - switch(ssl_version) { case CURL_SSLVERSION_TLSv1_3: #ifdef TLS1_3_VERSION @@ -2113,8 +2109,7 @@ set_ssl_version_min_max(long *ctx_options, struct connectdata *conn, #endif /* FALLTHROUGH */ case CURL_SSLVERSION_TLSv1_0: - *ctx_options |= SSL_OP_NO_SSLv2; - *ctx_options |= SSL_OP_NO_SSLv3; + case CURL_SSLVERSION_TLSv1: break; } @@ -2337,13 +2332,14 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex) case CURL_SSLVERSION_DEFAULT: case CURL_SSLVERSION_TLSv1: - ctx_options |= SSL_OP_NO_SSLv2; - ctx_options |= SSL_OP_NO_SSLv3; - /* FALLTHROUGH */ case CURL_SSLVERSION_TLSv1_0: case CURL_SSLVERSION_TLSv1_1: case CURL_SSLVERSION_TLSv1_2: case CURL_SSLVERSION_TLSv1_3: + /* asking for any TLS version as the minimum, means no SSL versions + allowed */ + ctx_options |= SSL_OP_NO_SSLv2; + ctx_options |= SSL_OP_NO_SSLv3; result = set_ssl_version_min_max(&ctx_options, conn, sockindex); if(result != CURLE_OK) return result; -- cgit v1.2.3