openssl-3/openssl-Add-support-for-PROFILE-SYSTEM-system-default-cipher.patch

From 736d709ec194b3a763e004696df22792c62a11fc Mon Sep 17 00:00:00 2001
From: Tomas Mraz <tmraz@fedoraproject.org>
Date: Thu, 24 Sep 2020 10:16:46 +0200
Subject: Add support for PROFILE=SYSTEM system default cipherlist

(was openssl-1.1.1-system-cipherlist.patch)
---
 Configurations/unix-Makefile.tmpl |    5 ++
 Configure                         |   11 ++++
 doc/man1/openssl-ciphers.pod.in   |    9 +++
 include/openssl/ssl.h.in          |    5 ++
 ssl/ssl_ciph.c                    |   87 +++++++++++++++++++++++++++++++++-----
 ssl/ssl_lib.c                     |    4 -
 test/cipherlist_test.c            |    2 
 util/libcrypto.num                |    1 
 8 files changed, 110 insertions(+), 14 deletions(-)

--- a/Configurations/unix-Makefile.tmpl
+++ b/Configurations/unix-Makefile.tmpl
@@ -315,6 +315,10 @@ MANDIR=$(INSTALLTOP)/share/man
 DOCDIR=$(INSTALLTOP)/share/doc/$(BASENAME)
 HTMLDIR=$(DOCDIR)/html
 
+{- output_off() if $config{system_ciphers_file} eq ""; "" -}
+SYSTEM_CIPHERS_FILE_DEFINE=-DSYSTEM_CIPHERS_FILE="\"{- $config{system_ciphers_file} -}\""
+{- output_on() if $config{system_ciphers_file} eq ""; "" -}
+
 # MANSUFFIX is for the benefit of anyone who may want to have a suffix
 # appended after the manpage file section number.  "ssl" is popular,
 # resulting in files such as config.5ssl rather than config.5.
@@ -338,6 +342,7 @@ CC=$(CROSS_COMPILE){- $config{CC} -}
 CXX={- $config{CXX} ? "\$(CROSS_COMPILE)$config{CXX}" : '' -}
 CPPFLAGS={- our $cppflags1 = join(" ",
                                   (map { "-D".$_} @{$config{CPPDEFINES}}),
+                                  "\$(SYSTEM_CIPHERS_FILE_DEFINE)",
                                   (map { "-I".$_} @{$config{CPPINCLUDES}}),
                                   @{$config{CPPFLAGS}}) -}
 CFLAGS={- join(' ', @{$config{CFLAGS}}) -}
--- a/Configure
+++ b/Configure
@@ -27,7 +27,7 @@ use OpenSSL::config;
 my $orig_death_handler = $SIG{__DIE__};
 $SIG{__DIE__} = \&death_handler;
 
-my $usage="Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-egd] [sctp] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [--config=FILE] os/compiler[:flags]\n";
+my $usage="Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-egd] [sctp] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--system-ciphers-file=SYSTEMCIPHERFILE] [--with-xxx[=vvv]] [--config=FILE] os/compiler[:flags]\n";
 
 my $banner = <<"EOF";
 
@@ -61,6 +61,10 @@ EOF
 #               given with --prefix.
 #               This becomes the value of OPENSSLDIR in Makefile and in C.
 #               (Default: PREFIX/ssl)
+#
+# --system-ciphers-file  A file to read cipher string from when the PROFILE=SYSTEM
+#		cipher is specified (default).
+#
 # --banner=".." Output specified text instead of default completion banner
 #
 # -w            Don't wait after showing a Configure warning
@@ -387,6 +391,7 @@ $config{prefix}="";
 $config{openssldir}="";
 $config{processor}="";
 $config{libdir}="";
+$config{system_ciphers_file}="";
 my $auto_threads=1;    # enable threads automatically? true by default
 my $default_ranlib;
 
@@ -989,6 +994,10 @@ while (@argvcopy)
                         die "FIPS key too long (64 bytes max)\n"
                            if length $1 > 64;
                         }
+                elsif (/^--system-ciphers-file=(.*)$/)
+                        {
+                        $config{system_ciphers_file}=$1;
+                        }
                 elsif (/^--banner=(.*)$/)
                         {
                         $banner = $1 . "\n";
--- a/doc/man1/openssl-ciphers.pod.in
+++ b/doc/man1/openssl-ciphers.pod.in
@@ -186,6 +186,15 @@ As of OpenSSL 1.0.0, the B<ALL> cipher s
 
 The cipher suites not enabled by B<ALL>, currently B<eNULL>.
 
+=item B<PROFILE=SYSTEM>
+
+The list of enabled cipher suites will be loaded from the system crypto policy
+configuration file B</etc/crypto-policies/back-ends/openssl.config>.
+See also L<update-crypto-policies(8)>.
+This is the default behavior unless an application explicitly sets a cipher
+list. If used in a cipher list configuration value this string must be at the
+beginning of the cipher list, otherwise it will not be recognized.
+
 =item B<HIGH>
 
 "High" encryption cipher suites. This currently means those with key lengths
--- a/include/openssl/ssl.h.in
+++ b/include/openssl/ssl.h.in
@@ -213,6 +213,11 @@ extern "C" {
  * throwing out anonymous and unencrypted ciphersuites! (The latter are not
  * actually enabled by ALL, but "ALL:RSA" would enable some of them.)
  */
+# ifdef SYSTEM_CIPHERS_FILE
+#  define SSL_SYSTEM_DEFAULT_CIPHER_LIST "PROFILE=SYSTEM"
+# else
+#  define SSL_SYSTEM_DEFAULT_CIPHER_LIST OSSL_default_cipher_list()
+# endif
 
 /* Used in SSL_set_shutdown()/SSL_get_shutdown(); */
 # define SSL_SENT_SHUTDOWN       1
--- a/ssl/ssl_ciph.c
+++ b/ssl/ssl_ciph.c
@@ -1443,6 +1443,53 @@ int SSL_set_ciphersuites(SSL *s, const c
     return ret;
 }
 
+#ifdef SYSTEM_CIPHERS_FILE
+static char *load_system_str(const char *suffix)
+{
+    FILE *fp;
+    char buf[1024];
+    char *new_rules;
+    const char *ciphers_path;
+    unsigned len, slen;
+
+    if ((ciphers_path = ossl_safe_getenv("OPENSSL_SYSTEM_CIPHERS_OVERRIDE")) == NULL)
+        ciphers_path = SYSTEM_CIPHERS_FILE;
+    fp = fopen(ciphers_path, "r");
+    if (fp == NULL || fgets(buf, sizeof(buf), fp) == NULL) {
+        /* cannot open or file is empty */
+        snprintf(buf, sizeof(buf), "%s", SSL_DEFAULT_CIPHER_LIST);
+    }
+
+    if (fp)
+        fclose(fp);
+
+    slen = strlen(suffix);
+    len = strlen(buf);
+
+    if (buf[len - 1] == '\n') {
+        len--;
+        buf[len] = 0;
+    }
+    if (buf[len - 1] == '\r') {
+        len--;
+        buf[len] = 0;
+    }
+
+    new_rules = OPENSSL_malloc(len + slen + 1);
+    if (new_rules == 0)
+        return NULL;
+
+    memcpy(new_rules, buf, len);
+    if (slen > 0) {
+        memcpy(&new_rules[len], suffix, slen);
+        len += slen;
+    }
+    new_rules[len] = 0;
+
+    return new_rules;
+}
+#endif
+
 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_CTX *ctx,
                                              STACK_OF(SSL_CIPHER) *tls13_ciphersuites,
                                              STACK_OF(SSL_CIPHER) **cipher_list,
@@ -1457,15 +1504,25 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
     CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
     const SSL_CIPHER **ca_list = NULL;
     const SSL_METHOD *ssl_method = ctx->method;
+#ifdef SYSTEM_CIPHERS_FILE
+    char *new_rules = NULL;
+
+    if (rule_str != NULL && strncmp(rule_str, "PROFILE=SYSTEM", 14) == 0) {
+        char *p = rule_str + 14;
+
+        new_rules = load_system_str(p);
+        rule_str = new_rules;
+    }
+#endif
 
     /*
      * Return with error if nothing to do.
      */
     if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
-        return NULL;
+        goto err;
 
     if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
-        return NULL;
+        goto err;
 
     /*
      * To reduce the work to do we only want to process the compiled
@@ -1487,7 +1544,7 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
     co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
     if (co_list == NULL) {
         ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
-        return NULL;          /* Failure */
+        goto err;
     }
 
     ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
@@ -1553,8 +1610,7 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
      * in force within each class
      */
     if (!ssl_cipher_strength_sort(&head, &tail)) {
-        OPENSSL_free(co_list);
-        return NULL;
+        goto err;
     }
 
     /*
@@ -1598,9 +1654,8 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
     num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
     ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
     if (ca_list == NULL) {
-        OPENSSL_free(co_list);
         ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
-        return NULL;          /* Failure */
+        goto err;
     }
     ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
                                disabled_mkey, disabled_auth, disabled_enc,
@@ -1633,8 +1688,7 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
     OPENSSL_free(ca_list);      /* Not needed anymore */
 
     if (!ok) {                  /* Rule processing failure */
-        OPENSSL_free(co_list);
-        return NULL;
+        goto err;
     }
 
     /*
@@ -1642,10 +1696,13 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
      * if we cannot get one.
      */
     if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
-        OPENSSL_free(co_list);
-        return NULL;
+        goto err;
     }
 
+#ifdef SYSTEM_CIPHERS_FILE
+    OPENSSL_free(new_rules);    /* Not needed anymore */
+#endif
+
     /* Add TLSv1.3 ciphers first - we always prefer those if possible */
     for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) {
         const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
@@ -1697,6 +1754,14 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_
     *cipher_list = cipherstack;
 
     return cipherstack;
+
+err:
+    OPENSSL_free(co_list);
+#ifdef SYSTEM_CIPHERS_FILE
+    OPENSSL_free(new_rules);
+#endif
+    return NULL;
+
 }
 
 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -661,7 +661,7 @@ int SSL_CTX_set_ssl_version(SSL_CTX *ctx
                                 ctx->tls13_ciphersuites,
                                 &(ctx->cipher_list),
                                 &(ctx->cipher_list_by_id),
-                                OSSL_default_cipher_list(), ctx->cert);
+                                SSL_SYSTEM_DEFAULT_CIPHER_LIST, ctx->cert);
     if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
         ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
         return 0;
@@ -3286,7 +3286,7 @@ SSL_CTX *SSL_CTX_new_ex(OSSL_LIB_CTX *li
     if (!ssl_create_cipher_list(ret,
                                 ret->tls13_ciphersuites,
                                 &ret->cipher_list, &ret->cipher_list_by_id,
-                                OSSL_default_cipher_list(), ret->cert)
+                                SSL_SYSTEM_DEFAULT_CIPHER_LIST, ret->cert)
         || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
         ERR_raise(ERR_LIB_SSL, SSL_R_LIBRARY_HAS_NO_CIPHERS);
         goto err2;
--- a/test/cipherlist_test.c
+++ b/test/cipherlist_test.c
@@ -246,7 +246,9 @@ end:
 
 int setup_tests(void)
 {
+#ifndef SYSTEM_CIPHERS_FILE
     ADD_TEST(test_default_cipherlist_implicit);
+#endif
     ADD_TEST(test_default_cipherlist_explicit);
     ADD_TEST(test_default_cipherlist_clear);
     return 1;
--- a/util/libcrypto.num
+++ b/util/libcrypto.num
@@ -5435,3 +5435,4 @@ EVP_MD_CTX_dup
 EVP_CIPHER_CTX_dup                      5563	3_1_0	EXIST::FUNCTION:
 BN_are_coprime                          5564	3_1_0	EXIST::FUNCTION:
 OSSL_CMP_MSG_update_recipNonce          5565	3_0_9	EXIST::FUNCTION:CMP
+ossl_safe_getenv                        ?	3_0_0	EXIST::FUNCTION: