client support for --ssl-fp and --ssl--fplist

implement --ssl-fp and --ssl-fplist for all clients.
--ssl-fp takes one certificate fingerprint, for example,
00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33

--ssl-fplist takes a path to a file with one fingerprint per line.

if the server's certificate fingerprint matches ssl-fp or is found
in the file - the certificate is considered verified.
If the fingerprint is specified but doesn't match - the connection
is aborted independently from the --ssl-verify-server-cert

client/client_priv.h

@@ -111,6 +111,7 @@ enum options_client
   OPT_DO_DOMAIN_IDS,
   OPT_IGNORE_SERVER_IDS,
   OPT_DO_SERVER_IDS,
+  OPT_SSL_FP, OPT_SSL_FPLIST,
   OPT_MAX_CLIENT_OPTION /* should be always the last */
 };
 

extra/mariabackup/xtrabackup.cc

@@ -217,10 +217,10 @@ static ulong max_buf_pool_modified_pct;
 /* Ignored option (--log) for MySQL option compatibility */
 static char*	log_ignored_opt;
 
-
 extern my_bool opt_use_ssl;
 extern char *opt_tls_version;
 my_bool opt_ssl_verify_server_cert;
+char *opt_ssl_fp, *opt_ssl_fplist;
 my_bool opt_extended_validation;
 my_bool opt_encrypted_backup;
 

include/sslopt-case.h

@@ -24,6 +24,11 @@
     case OPT_SSL_CIPHER:
     case OPT_SSL_CRL:
     case OPT_SSL_CRLPATH:
+    case OPT_TLS_VERSION:
+#ifdef MYSQL_CLIENT
+    case OPT_SSL_FP:
+    case OPT_SSL_FPLIST:
+#endif
     /*
       Enable use of SSL if we are using any ssl option
       One can disable SSL later by using --skip-ssl or --ssl=0

include/sslopt-longopts.h

@@ -52,6 +52,11 @@
    0, 0, 0, 0, 0, 0},
 
 #ifdef MYSQL_CLIENT
+  {"ssl-fp", OPT_SSL_FP, "Server certificate fingerprint (implies --ssl).",
+   &opt_ssl_fp, &opt_ssl_fp, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+  {"ssl-fplist", OPT_SSL_FPLIST, "File with accepted server certificate "
+   "fingerprints, one per line (implies --ssl).",
+   &opt_ssl_fplist, &opt_ssl_fplist, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"ssl-verify-server-cert", OPT_SSL_VERIFY_SERVER_CERT,
    "Verify server's certificate to prevent man-in-the-middle attacks",
    &opt_ssl_verify_server_cert, &opt_ssl_verify_server_cert,

include/sslopt-vars.h

@@ -32,6 +32,8 @@ SSL_STATIC char *opt_ssl_crl     = 0;
 SSL_STATIC char *opt_ssl_crlpath = 0;
 SSL_STATIC char *opt_tls_version = 0;
 #ifdef MYSQL_CLIENT
+SSL_STATIC char *opt_ssl_fp      = 0;
+SSL_STATIC char *opt_ssl_fplist  = 0;
 SSL_STATIC my_bool opt_ssl_verify_server_cert= 0;
 
 #define SET_SSL_OPTS(M)                                                 \
@@ -43,6 +45,8 @@ SSL_STATIC my_bool opt_ssl_verify_server_cert= 0;
       mysql_options((M), MYSQL_OPT_SSL_CRL, opt_ssl_crl);               \
       mysql_options((M), MYSQL_OPT_SSL_CRLPATH, opt_ssl_crlpath);       \
       mysql_options((M), MARIADB_OPT_TLS_VERSION, opt_tls_version);     \
+      mysql_options((M), MARIADB_OPT_TLS_PEER_FP, opt_ssl_fp);          \
+      mysql_options((M), MARIADB_OPT_TLS_PEER_FP_LIST, opt_ssl_fplist); \
     }                                                                   \
     mysql_options((M),MYSQL_OPT_SSL_VERIFY_SERVER_CERT,                 \
                   &opt_ssl_verify_server_cert);                         \

mysql-test/main/ssl_fp.result

+create function have_ssl() returns char(3)
+return (select if(variable_value > '','yes','no') as 'have_ssl'
+  from information_schema.session_status
+where variable_name='ssl_cipher');
+# mysql --protocol tcp -uroot --ssl-verify-server-cert -e "select test.have_ssl()"
+ERROR 2026 (HY000): TLS/SSL error: Failed to verify the server certificate
+# mysql --protocol tcp -uroot --ssl-fp=F1:D0:08:AF:A1:D2:F4:15:79:B4:39:06:41:F4:20:96:F1:90:A9:65 --ssl-verify-server-cert -e "select test.have_ssl()"
+test.have_ssl()
+yes
+# mysql --protocol tcp -uroot --ssl-fp=00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33 --disable-ssl-verify-server-cert -e "select test.have_ssl()"
+ERROR 2026 (HY000): TLS/SSL error: Fingerprint verification of server certificate failed
+drop function have_ssl;

mysql-test/main/ssl_fp.test

+source include/not_embedded.inc;
+
+create function have_ssl() returns char(3)
+  return (select if(variable_value > '','yes','no') as 'have_ssl'
+  from information_schema.session_status
+  where variable_name='ssl_cipher');
+
+#
+# passwordless root cannot connect w/o fingerprint:
+#
+--echo # mysql --protocol tcp -uroot --ssl-verify-server-cert -e "select test.have_ssl()"
+--replace_regex /TLS\/SSL error.*certificate[^\n]*/TLS\/SSL error: Failed to verify the server certificate/
+--error 1
+--exec $MYSQL --protocol tcp -uroot --ssl-verify-server-cert -e "select test.have_ssl()" 2>&1
+#
+# fingerprint based cert verification:
+#
+--echo # mysql --protocol tcp -uroot --ssl-fp=F1:D0:08:AF:A1:D2:F4:15:79:B4:39:06:41:F4:20:96:F1:90:A9:65 --ssl-verify-server-cert -e "select test.have_ssl()"
+--exec $MYSQL --protocol tcp -uroot --ssl-fp=F1:D0:08:AF:A1:D2:F4:15:79:B4:39:06:41:F4:20:96:F1:90:A9:65 --ssl-verify-server-cert -e "select test.have_ssl()" 2>&1
+#
+# wrong fingerprint fails even with --disable-ssl-verify-server-cert
+#
+--echo # mysql --protocol tcp -uroot --ssl-fp=00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33 --disable-ssl-verify-server-cert -e "select test.have_ssl()"
+--error 1
+--exec $MYSQL --protocol tcp -uroot --ssl-fp=00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33 --disable-ssl-verify-server-cert -e "select test.have_ssl()" 2>&1
+
+drop function have_ssl;