initial/final commitHEADmaster

1 files changed, 329 insertions, 0 deletions

diff --git a/openssl-1.1.0h/ssl/d1_srtp.c b/openssl-1.1.0h/ssl/d1_srtp.c
new file mode 100644
index 0000000..7e88f17
--- /dev/null
+++ b/openssl-1.1.0h/ssl/d1_srtp.c
@@ -0,0 +1,329 @@
+/*
+ * Copyright 2011-2016 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
+ */
+
+/*
+ * DTLS code by Eric Rescorla <ekr@rtfm.com>
+ *
+ * Copyright (C) 2006, Network Resonance, Inc. Copyright (C) 2011, RTFM, Inc.
+ */
+
+#include <stdio.h>
+#include <openssl/objects.h>
+#include "ssl_locl.h"
+
+#ifndef OPENSSL_NO_SRTP
+
+static SRTP_PROTECTION_PROFILE srtp_known_profiles[] = {
+    {
+     "SRTP_AES128_CM_SHA1_80",
+     SRTP_AES128_CM_SHA1_80,
+     },
+    {
+     "SRTP_AES128_CM_SHA1_32",
+     SRTP_AES128_CM_SHA1_32,
+     },
+    {
+     "SRTP_AEAD_AES_128_GCM",
+     SRTP_AEAD_AES_128_GCM,
+     },
+    {
+     "SRTP_AEAD_AES_256_GCM",
+     SRTP_AEAD_AES_256_GCM,
+     },
+    {0}
+};
+
+static int find_profile_by_name(char *profile_name,
+                                SRTP_PROTECTION_PROFILE **pptr, unsigned len)
+{
+    SRTP_PROTECTION_PROFILE *p;
+
+    p = srtp_known_profiles;
+    while (p->name) {
+        if ((len == strlen(p->name))
+            && strncmp(p->name, profile_name, len) == 0) {
+            *pptr = p;
+            return 0;
+        }
+
+        p++;
+    }
+
+    return 1;
+}
+
+static int ssl_ctx_make_profiles(const char *profiles_string,
+                                 STACK_OF(SRTP_PROTECTION_PROFILE) **out)
+{
+    STACK_OF(SRTP_PROTECTION_PROFILE) *profiles;
+
+    char *col;
+    char *ptr = (char *)profiles_string;
+    SRTP_PROTECTION_PROFILE *p;
+
+    if ((profiles = sk_SRTP_PROTECTION_PROFILE_new_null()) == NULL) {
+        SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
+               SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
+        return 1;
+    }
+
+    do {
+        col = strchr(ptr, ':');
+
+        if (!find_profile_by_name(ptr, &p, col ? col - ptr : (int)strlen(ptr))) {
+            if (sk_SRTP_PROTECTION_PROFILE_find(profiles, p) >= 0) {
+                SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
+                       SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
+                goto err;
+            }
+
+            if (!sk_SRTP_PROTECTION_PROFILE_push(profiles, p)) {
+                SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
+                       SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
+                goto err;
+            }
+        } else {
+            SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
+                   SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
+            goto err;
+        }
+
+        if (col)
+            ptr = col + 1;
+    } while (col);
+
+    sk_SRTP_PROTECTION_PROFILE_free(*out);
+
+    *out = profiles;
+
+    return 0;
+ err:
+    sk_SRTP_PROTECTION_PROFILE_free(profiles);
+    return 1;
+}
+
+int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles)
+{
+    return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles);
+}
+
+int SSL_set_tlsext_use_srtp(SSL *s, const char *profiles)
+{
+    return ssl_ctx_make_profiles(profiles, &s->srtp_profiles);
+}
+
+STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *s)
+{
+    if (s != NULL) {
+        if (s->srtp_profiles != NULL) {
+            return s->srtp_profiles;
+        } else if ((s->ctx != NULL) && (s->ctx->srtp_profiles != NULL)) {
+            return s->ctx->srtp_profiles;
+        }
+    }
+
+    return NULL;
+}
+
+SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *s)
+{
+    return s->srtp_profile;
+}
+
+/*
+ * Note: this function returns 0 length if there are no profiles specified
+ */
+int ssl_add_clienthello_use_srtp_ext(SSL *s, unsigned char *p, int *len,
+                                     int maxlen)
+{
+    int ct = 0;
+    int i;
+    STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = 0;
+    SRTP_PROTECTION_PROFILE *prof;
+
+    clnt = SSL_get_srtp_profiles(s);
+    ct = sk_SRTP_PROTECTION_PROFILE_num(clnt); /* -1 if clnt == 0 */
+
+    if (p) {
+        if (ct == 0) {
+            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,
+                   SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST);
+            return 1;
+        }
+
+        if ((2 + ct * 2 + 1) > maxlen) {
+            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,
+                   SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
+            return 1;
+        }
+
+        /* Add the length */
+        s2n(ct * 2, p);
+        for (i = 0; i < ct; i++) {
+            prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
+            s2n(prof->id, p);
+        }
+
+        /* Add an empty use_mki value */
+        *p++ = 0;
+    }
+
+    *len = 2 + ct * 2 + 1;
+
+    return 0;
+}
+
+int ssl_parse_clienthello_use_srtp_ext(SSL *s, PACKET *pkt, int *al)
+{
+    SRTP_PROTECTION_PROFILE *sprof;
+    STACK_OF(SRTP_PROTECTION_PROFILE) *srvr;
+    unsigned int ct, mki_len, id;
+    int i, srtp_pref;
+    PACKET subpkt;
+
+    /* Pull off the length of the cipher suite list  and check it is even */
+    if (!PACKET_get_net_2(pkt, &ct)
+        || (ct & 1) != 0 || !PACKET_get_sub_packet(pkt, &subpkt, ct)) {
+        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
+               SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
+        *al = SSL_AD_DECODE_ERROR;
+        return 1;
+    }
+
+    srvr = SSL_get_srtp_profiles(s);
+    s->srtp_profile = NULL;
+    /* Search all profiles for a match initially */
+    srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr);
+
+    while (PACKET_remaining(&subpkt)) {
+        if (!PACKET_get_net_2(&subpkt, &id)) {
+            SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
+                   SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
+            *al = SSL_AD_DECODE_ERROR;
+            return 1;
+        }
+
+        /*
+         * Only look for match in profiles of higher preference than
+         * current match.
+         * If no profiles have been have been configured then this
+         * does nothing.
+         */
+        for (i = 0; i < srtp_pref; i++) {
+            sprof = sk_SRTP_PROTECTION_PROFILE_value(srvr, i);
+            if (sprof->id == id) {
+                s->srtp_profile = sprof;
+                srtp_pref = i;
+                break;
+            }
+        }
+    }
+
+    /*
+     * Now extract the MKI value as a sanity check, but discard it for now
+     */
+    if (!PACKET_get_1(pkt, &mki_len)) {
+        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
+               SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
+        *al = SSL_AD_DECODE_ERROR;
+        return 1;
+    }
+
+    if (!PACKET_forward(pkt, mki_len)
+        || PACKET_remaining(pkt)) {
+        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
+               SSL_R_BAD_SRTP_MKI_VALUE);
+        *al = SSL_AD_DECODE_ERROR;
+        return 1;
+    }
+
+    return 0;
+}
+
+int ssl_add_serverhello_use_srtp_ext(SSL *s, unsigned char *p, int *len,
+                                     int maxlen)
+{
+    if (p) {
+        if (maxlen < 5) {
+            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,
+                   SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
+            return 1;
+        }
+
+        if (s->srtp_profile == 0) {
+            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,
+                   SSL_R_USE_SRTP_NOT_NEGOTIATED);
+            return 1;
+        }
+        s2n(2, p);
+        s2n(s->srtp_profile->id, p);
+        *p++ = 0;
+    }
+    *len = 5;
+
+    return 0;
+}
+
+int ssl_parse_serverhello_use_srtp_ext(SSL *s, PACKET *pkt, int *al)
+{
+    unsigned int id, ct, mki;
+    int i;
+
+    STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
+    SRTP_PROTECTION_PROFILE *prof;
+
+    if (!PACKET_get_net_2(pkt, &ct)
+        || ct != 2 || !PACKET_get_net_2(pkt, &id)
+        || !PACKET_get_1(pkt, &mki)
+        || PACKET_remaining(pkt) != 0) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
+               SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
+        *al = SSL_AD_DECODE_ERROR;
+        return 1;
+    }
+
+    if (mki != 0) {
+        /* Must be no MKI, since we never offer one */
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
+               SSL_R_BAD_SRTP_MKI_VALUE);
+        *al = SSL_AD_ILLEGAL_PARAMETER;
+        return 1;
+    }
+
+    clnt = SSL_get_srtp_profiles(s);
+
+    /* Throw an error if the server gave us an unsolicited extension */
+    if (clnt == NULL) {
+        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
+               SSL_R_NO_SRTP_PROFILES);
+        *al = SSL_AD_DECODE_ERROR;
+        return 1;
+    }
+
+    /*
+     * Check to see if the server gave us something we support (and
+     * presumably offered)
+     */
+    for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
+        prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
+
+        if (prof->id == id) {
+            s->srtp_profile = prof;
+            *al = 0;
+            return 0;
+        }
+    }
+
+    SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
+           SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
+    *al = SSL_AD_DECODE_ERROR;
+    return 1;
+}
+
+#endif