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Support TLS_FALLBACK_SCSV.

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Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Bodo Moeller
2014-10-15 04:05:42 +02:00
parent 4e05aedbca
commit 6bfe55380a
16 changed files with 141 additions and 26 deletions
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29
ssl/s3_lib.c
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@@ -3355,6 +3355,33 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg)
#endif
#endif /* !OPENSSL_NO_TLSEXT */
case SSL_CTRL_CHECK_PROTO_VERSION:
/* For library-internal use; checks that the current protocol
* is the highest enabled version (according to s->ctx->method,
* as version negotiation may have changed s->method). */
if (s->version == s->ctx->method->version)
return 1;
/* Apparently we're using a version-flexible SSL_METHOD
* (not at its highest protocol version). */
if (s->ctx->method->version == SSLv23_method()->version)
{
#if TLS_MAX_VERSION != TLS1_2_VERSION
# error Code needs update for SSLv23_method() support beyond TLS1_2_VERSION.
#endif
if (!(s->options & SSL_OP_NO_TLSv1_2))
return s->version == TLS1_2_VERSION;
if (!(s->options & SSL_OP_NO_TLSv1_1))
return s->version == TLS1_1_VERSION;
if (!(s->options & SSL_OP_NO_TLSv1))
return s->version == TLS1_VERSION;
if (!(s->options & SSL_OP_NO_SSLv3))
return s->version == SSL3_VERSION;
if (!(s->options & SSL_OP_NO_SSLv2))
return s->version == SSL2_VERSION;
}
return 0; /* Unexpected state; fail closed. */
default:
break;
}
@@ -3714,6 +3741,7 @@ long ssl3_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
break;
#endif
#endif
default:
return(0);
}
@@ -4296,4 +4324,3 @@ long ssl_get_algorithm2(SSL *s)
return SSL_HANDSHAKE_MAC_SHA256 | TLS1_PRF_SHA256;
return alg2;
}