Openssl 1.1.0h

2018-04-02 22:33:38 +09:00
commit 1fd4faa81c
2471 changed files with 719220 additions and 0 deletions
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+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <openssl/objects.h>
+#include "ssl_locl.h"
+
+/* Add the client's renegotiation binding */
+int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
+                                        int maxlen)
+{
+    if (p) {
+        if ((s->s3->previous_client_finished_len + 1) > maxlen) {
+            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,
+                   SSL_R_RENEGOTIATE_EXT_TOO_LONG);
+            return 0;
+        }
+
+        /* Length byte */
+        *p = s->s3->previous_client_finished_len;
+        p++;
+
+        memcpy(p, s->s3->previous_client_finished,
+               s->s3->previous_client_finished_len);
+    }
+
+    *len = s->s3->previous_client_finished_len + 1;
+
+    return 1;
+}
+
+/*
+ * Parse the client's renegotiation binding and abort if it's not right
+ */
+int ssl_parse_clienthello_renegotiate_ext(SSL *s, PACKET *pkt, int *al)
+{
+    unsigned int ilen;
+    const unsigned char *d;
+
+    /* Parse the length byte */
+    if (!PACKET_get_1(pkt, &ilen)
+        || !PACKET_get_bytes(pkt, &d, ilen)) {
+        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_ENCODING_ERR);
+        *al = SSL_AD_ILLEGAL_PARAMETER;
+        return 0;
+    }
+
+    /* Check that the extension matches */
+    if (ilen != s->s3->previous_client_finished_len) {
+        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_MISMATCH);
+        *al = SSL_AD_HANDSHAKE_FAILURE;
+        return 0;
+    }
+
+    if (memcmp(d, s->s3->previous_client_finished,
+               s->s3->previous_client_finished_len)) {
+        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_MISMATCH);
+        *al = SSL_AD_HANDSHAKE_FAILURE;
+        return 0;
+    }
+
+    s->s3->send_connection_binding = 1;
+
+    return 1;
+}
+
+/* Add the server's renegotiation binding */
+int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
+                                        int maxlen)
+{
+    if (p) {
+        if ((s->s3->previous_client_finished_len +
+             s->s3->previous_server_finished_len + 1) > maxlen) {
+            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,
+                   SSL_R_RENEGOTIATE_EXT_TOO_LONG);
+            return 0;
+        }
+
+        /* Length byte */
+        *p = s->s3->previous_client_finished_len +
+            s->s3->previous_server_finished_len;
+        p++;
+
+        memcpy(p, s->s3->previous_client_finished,
+               s->s3->previous_client_finished_len);
+        p += s->s3->previous_client_finished_len;
+
+        memcpy(p, s->s3->previous_server_finished,
+               s->s3->previous_server_finished_len);
+    }
+
+    *len = s->s3->previous_client_finished_len
+        + s->s3->previous_server_finished_len + 1;
+
+    return 1;
+}
+
+/*
+ * Parse the server's renegotiation binding and abort if it's not right
+ */
+int ssl_parse_serverhello_renegotiate_ext(SSL *s, PACKET *pkt, int *al)
+{
+    unsigned int expected_len = s->s3->previous_client_finished_len
+        + s->s3->previous_server_finished_len;
+    unsigned int ilen;
+    const unsigned char *data;
+
+    /* Check for logic errors */
+    OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
+    OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
+
+    /* Parse the length byte */
+    if (!PACKET_get_1(pkt, &ilen)) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_ENCODING_ERR);
+        *al = SSL_AD_ILLEGAL_PARAMETER;
+        return 0;
+    }
+
+    /* Consistency check */
+    if (PACKET_remaining(pkt) != ilen) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_ENCODING_ERR);
+        *al = SSL_AD_ILLEGAL_PARAMETER;
+        return 0;
+    }
+
+    /* Check that the extension matches */
+    if (ilen != expected_len) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_MISMATCH);
+        *al = SSL_AD_HANDSHAKE_FAILURE;
+        return 0;
+    }
+
+    if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
+        || memcmp(data, s->s3->previous_client_finished,
+                  s->s3->previous_client_finished_len) != 0) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_MISMATCH);
+        *al = SSL_AD_HANDSHAKE_FAILURE;
+        return 0;
+    }
+
+    if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
+        || memcmp(data, s->s3->previous_server_finished,
+                  s->s3->previous_server_finished_len) != 0) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
+               SSL_R_RENEGOTIATION_MISMATCH);
+        *al = SSL_AD_ILLEGAL_PARAMETER;
+        return 0;
+    }
+    s->s3->send_connection_binding = 1;
+
+    return 1;
+}