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fetchers/curl: disable TLS1.0 and TLS1.1 support

This commit is contained in:
John-Mark Bell 2022-11-05 12:35:42 +00:00
parent 53e92ed57b
commit 85da9873f7
2 changed files with 7 additions and 11 deletions
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16
content/fetchers/curl.c
View File

@ -233,7 +233,7 @@ struct curl_fetch_info {
bool abort; /**< Abort requested. */
bool stopped; /**< Download stopped on purpose. */
bool only_2xx; /**< Only HTTP 2xx responses acceptable. */
bool downgrade_tls; /**< Downgrade to TLS <= 1.0 */
bool downgrade_tls; /**< Downgrade to TLS 1.2 */
nsurl *url; /**< URL of this fetch. */
lwc_string *host; /**< The hostname of this fetch. */
struct curl_slist *headers; /**< List of request headers. */
@ -813,7 +813,8 @@ fetch_curl_sslctxfun(CURL *curl_handle, void *_sslctx, void *parm)
{
struct curl_fetch_info *f = (struct curl_fetch_info *) parm;
SSL_CTX *sslctx = _sslctx;
long options = SSL_OP_ALL | SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;
long options = SSL_OP_ALL | SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1;
/* set verify callback for each certificate in chain */
SSL_CTX_set_verify(sslctx, SSL_VERIFY_PEER, fetch_curl_verify_callback);
@ -824,19 +825,14 @@ fetch_curl_sslctxfun(CURL *curl_handle, void *_sslctx, void *parm)
parm);
if (f->downgrade_tls) {
/* Disable TLS 1.1/1.2 if the server can't cope with them */
#ifdef SSL_OP_NO_TLSv1_1
options |= SSL_OP_NO_TLSv1_1;
#endif
#ifdef SSL_OP_NO_TLSv1_2
options |= SSL_OP_NO_TLSv1_2;
/* Disable TLS 1.3 if the server can't cope with it */
#ifdef SSL_OP_NO_TLSv1_3
options |= SSL_OP_NO_TLSv1_3;
#endif
#ifdef SSL_MODE_SEND_FALLBACK_SCSV
/* Ensure server rejects the connection if downgraded too far */
SSL_CTX_set_mode(sslctx, SSL_MODE_SEND_FALLBACK_SCSV);
#endif
/* Disable TLS1.2 ciphersuites */
SSL_CTX_set_cipher_list(sslctx, CIPHER_LIST ":-TLSv1.2");
}
SSL_CTX_set_options(sslctx, options);

2
content/llcache.c
View File

@ -116,7 +116,7 @@ typedef struct {
bool tried_with_auth; /**< Whether we've tried with auth */
bool tried_with_tls_downgrade; /**< Whether we've tried TLS <= 1.0 */
bool tried_with_tls_downgrade; /**< Whether we've tried TLS 1.2 */
bool tainted_tls; /**< Whether the TLS transport is tainted */
} llcache_fetch_ctx;