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openssl: Allow newer TLS versions than TLSv1 

The use of TLSv1_*_method() disallows newer protocol versions; instead
use SSLv23_*_method() and then explicitly disable the deprecated
protocol versions which should not be supported.

Fixes ticket #5915.
This commit is contained in:
Mark Thompson 2016-10-28 19:50:27 +01:00
parent 121be31060
commit e8634fb92e
1 changed files with 6 additions and 1 deletions
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7
libavformat/tls_openssl.c
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@ -233,12 +233,17 @@ static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **op
if ((ret = ff_tls_open_underlying(c, h, uri, options)) < 0)
goto fail;
p->ctx = SSL_CTX_new(c->listen ? TLSv1_server_method() : TLSv1_client_method());
// We want to support all versions of TLS >= 1.0, but not the deprecated
// and insecure SSLv2 and SSLv3. Despite the name, SSLv23_*_method()
// enables support for all versions of SSL and TLS, and we then disable
// support for the old protocols immediately after creating the context.
p->ctx = SSL_CTX_new(c->listen ? SSLv23_server_method() : SSLv23_client_method());
if (!p->ctx) {
av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
ret = AVERROR(EIO);
goto fail;
}
SSL_CTX_set_options(p->ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
if (c->ca_file) {
if (!SSL_CTX_load_verify_locations(p->ctx, c->ca_file, NULL))
av_log(h, AV_LOG_ERROR, "SSL_CTX_load_verify_locations %s\n", ERR_error_string(ERR_get_error(), NULL));