标签归档：传输加密

配置Oracle传输数据加密

发表于 2018 年 6 月 24 日由惜分飞

随着安全意识和需求的越来越高,有一些客户要求数据库传输数据过程中对其进行加密,防止有人在网络层面通过抓包,获取数据内容,从而保证了在网络层面的数据传输安全.实现这种加密,主要是通过Database Advanced Security组件实现,主要是通过slnet.ora的配置实现数据在服务端和客户端之间传输加密.
数据库安装的安全组件和支持加密算法

[oracle@ora11g ~]$ adapters 

Installed Oracle Net transport protocols are:

    IPC
    BEQ
    TCP/IP
    SSL
    RAW
    SDP/IB

Installed Oracle Net naming methods are:

    Local Naming (tnsnames.ora)
    Oracle Directory Naming
    Oracle Host Naming
    Oracle Names Server Naming

Installed Oracle Advanced Security options are:

    RC4 40-bit encryption
    RC4 56-bit encryption
    RC4 128-bit encryption
    RC4 256-bit encryption
    DES40 40-bit encryption
    DES 56-bit encryption
    3DES 112-bit encryption
    3DES 168-bit encryption
    AES 128-bit encryption
    AES 192-bit encryption
    AES 256-bit encryption
    MD5 crypto-checksumming
    SHA-1 crypto-checksumming
    Kerberos v5 authentication
    RADIUS authentication

启用客户端trace
trace只是为了验证传输加密,在实际生产中该功能需要关闭,不然会比较严重影响性能和导致trace文件过多磁盘空间占用较大问题

Trace_level_client=16
Trace_directory_client=D:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN\log
Trace_unique_client=on
Trace_timestamp_client=on
Diag_adr_enabled=off
tnsping.trace_directory=D:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN\log
tnsping.trace_level=admin

捕获非加密情况数据
通过对客户端trace文件的分析,基本上可以发现客户端和服务端数据传输是明码方式进行,也就是说如果有人在这个网络上捕获包,进行分析,可以知道你的应用端和数据库端的所有操作,数据存在安全隐患

----数据库登录
[24-6月 -2018 12:37:55:555] nam_gnsp: Reading parameter "SQLNET.ENCRYPTION_CLIENT" from parameter file
[24-6月 -2018 12:37:55:555] nam_gnsp: Parameter not found
[24-6月 -2018 12:37:55:555] naequad: Using default value "ACCEPTED"
[24-6月 -2018 12:37:55:555] nam_gic: entry
[24-6月 -2018 12:37:55:555] nam_gic: Counting # of items in "SQLNET.ENCRYPTION_TYPES_CLIENT" parameter
[24-6月 -2018 12:37:55:555] nam_gic: Parameter not found
[24-6月 -2018 12:37:55:555] nam_gic: exit
[24-6月 -2018 12:37:55:555] naesno: Using default value "all available algorithms"
[24-6月 -2018 12:37:55:555] naeshow: entry
[24-6月 -2018 12:37:55:555] naeshow: These are the encryption algorithms that the client will accept:
[24-6月 -2018 12:37:55:555] naeshow: Choice 0: no algorithm; encryption inactive
[24-6月 -2018 12:37:55:555] naeshow: Choice 1: 'AES256' (ID 17)
[24-6月 -2018 12:37:55:555] naeshow: Choice 2: 'RC4_256' (ID 6)
[24-6月 -2018 12:37:55:555] naeshow: Choice 3: 'AES192' (ID 16)
[24-6月 -2018 12:37:55:555] naeshow: Choice 4: '3DES168' (ID 12)
[24-6月 -2018 12:37:55:555] naeshow: Choice 5: 'AES128' (ID 15)
[24-6月 -2018 12:37:55:555] naeshow: Choice 6: 'RC4_128' (ID 10)
[24-6月 -2018 12:37:55:555] naeshow: Choice 7: '3DES112' (ID 11)
[24-6月 -2018 12:37:55:555] naeshow: Choice 8: 'RC4_56' (ID 8)
[24-6月 -2018 12:37:55:555] naeshow: Choice 9: 'DES' (ID 2)
[24-6月 -2018 12:37:55:555] naeshow: Choice 10: 'RC4_40' (ID 1)
[24-6月 -2018 12:37:55:555] naeshow: Choice 11: 'DES40' (ID 3)
[24-6月 -2018 12:37:55:555] naeshow: exit


----数据库执行select * from dual查询
[24-6月 -2018 12:39:38:744] nioqrc: entry
[24-6月 -2018 12:39:38:744] nsbasic_bsd: entry
[24-6月 -2018 12:39:38:744] nsbasic_bsd: tot=0, plen=256.
[24-6月 -2018 12:39:38:744] nttfpwr: entry
[24-6月 -2018 12:39:38:744] nttfpwr: socket 888 had bytes written=256
[24-6月 -2018 12:39:38:744] nttfpwr: exit
[24-6月 -2018 12:39:38:744] nsbasic_bsd: packet dump
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 01 00 00 00 06 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 03 5E 15 61 80 00  |...^.a..|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF 12 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 FE FF FF FF FF FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF 0D 00 00 00 FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 01 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF FE FF FF  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: FF FF FF FF FF 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 12 73 65 6C 65 63 74  |..select|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 20 2A 20 66 72 6F 6D 20  |.*.from.|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 64 75 61 6C 01 00 00 00  |dual....|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 01 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_bsd: exit (0)
[24-6月 -2018 12:39:38:744] nsbasic_brc: entry: oln/tot=0,prd=0

----返回查询结果
[24-6月 -2018 12:39:38:744] nsbasic_brc: packet dump
[24-6月 -2018 12:39:38:744] nsbasic_brc: 01 04 00 00 06 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 10 17 00 00 00 02  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: FC 54 0D 44 40 AD B2 74  |.T.D@..t|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 09 CB A2 01 A7 2D 38 78  |.....-8x|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 76 04 15 03 3B 28 01 00  |v...;(..|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 01 00 00 00 51 01  |......Q.|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 80 00 00 01 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 54 03 01  |.....T..|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 01 00 00 00 01 05 05 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 05 44 55 4D 4D 59  |...DUMMY|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 07 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 07 78 76 04 15 05  |...xv...|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 0F 0C 01 00 00 00 E8 1F  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 02 00 00 00 02 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 06 22  |......."|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 01 00 00 00 00 00 01 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 07 01 58 08  |......X.|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 06 00 7E 2D 18 00 00 00  |..~-....|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 02 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 04 01 00 00 00 13  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 01 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 02 00 00 00 03  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 15  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 01 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00 00 00 00 00  |........|
[24-6月 -2018 12:39:38:744] nsbasic_brc: 00 00 00 00              |....    |
[24-6月 -2018 12:39:38:744] nsbasic_brc: exit: oln=0, dln=250, tot=260, rc=0

启用数据传输加密
这几个参数,每个参数都有几种选项,具体在下文补充说明

--服务端配置sqlnet.ora中配置，并重启监听
SQLNET.ENCRYPTION_SERVER = requested
SQLNET.ENCRYPTION_TYPES_SERVER= (RC4_128)


--客户端sqlnet.ora中配置
SQLNET.ENCRYPTION_CLIENT = requested
SQLNET.ENCRYPTION_TYPES_CLIENT= (RC4_128)

捕获加密情况数据

----登录操作
[24-6月 -2018 12:45:16:786] nam_gnsp: Reading parameter "SQLNET.ENCRYPTION_CLIENT" from parameter file
[24-6月 -2018 12:45:16:786] nam_gnsp: Found value "requested"
[24-6月 -2018 12:45:16:786] nam_gic: entry
[24-6月 -2018 12:45:16:786] nam_gic: Counting # of items in "SQLNET.ENCRYPTION_TYPES_CLIENT" parameter
[24-6月 -2018 12:45:16:786] nam_gic: Found 1 items
[24-6月 -2018 12:45:16:786] nam_gic: exit
[24-6月 -2018 12:45:16:786] nam_gnsp: Reading parameter "SQLNET.ENCRYPTION_TYPES_CLIENT" from parameter file
[24-6月 -2018 12:45:16:786] nam_gnsp: Found value "RC4_128"
[24-6月 -2018 12:45:16:786] naeshow: entry
[24-6月 -2018 12:45:16:786] naeshow: These are the encryption algorithms that the client will accept:
[24-6月 -2018 12:45:16:786] naeshow: Choice 0: 'RC4_128' (ID 10)
[24-6月 -2018 12:45:16:786] naeshow: Choice 1: no algorithm; encryption inactive

----发送查询select * from dual
[24-6月 -2018 12:49:51:528] nttwr: socket 848 had bytes written=277
[24-6月 -2018 12:49:51:528] nttwr: exit
[24-6月 -2018 12:49:51:528] nspsend: packet dump
[24-6月 -2018 12:49:51:528] nspsend: 01 15 00 00 06 00 00 00  |........|
[24-6月 -2018 12:49:51:528] nspsend: 00 00 DF CE 9E 46 DB 71  |.....F.q|
[24-6月 -2018 12:49:51:528] nspsend: CE 88 43 9E CA 43 F8 BE  |..C..C..|
[24-6月 -2018 12:49:51:528] nspsend: E8 ED 07 F1 2E 93 B6 2C  |.......,|
[24-6月 -2018 12:49:51:528] nspsend: E9 5A E5 D8 06 8B DB EE  |.Z......|
[24-6月 -2018 12:49:51:528] nspsend: 66 9E B5 BB 24 C0 5E 4C  |f...$.^L|
[24-6月 -2018 12:49:51:528] nspsend: 33 9C 81 10 18 0F BE 30  |3......0|
[24-6月 -2018 12:49:51:528] nspsend: 79 56 4C D8 4A F9 4D 78  |yVL.J.Mx|
[24-6月 -2018 12:49:51:528] nspsend: 6A 42 24 89 D4 0D 1F 92  |jB$.....|
[24-6月 -2018 12:49:51:528] nspsend: 44 24 DA 42 15 49 22 09  |D$.B.I".|
[24-6月 -2018 12:49:51:528] nspsend: FE AF 07 EA 01 36 83 D4  |.....6..|
[24-6月 -2018 12:49:51:528] nspsend: D6 B3 16 BD 1E B2 88 93  |........|
[24-6月 -2018 12:49:51:528] nspsend: 29 39 DB 44 86 E5 C6 F2  |)9.D....|
[24-6月 -2018 12:49:51:528] nspsend: DF 87 90 4B 6E 5A 66 D3  |...KnZf.|
[24-6月 -2018 12:49:51:528] nspsend: B1 1A 3A 34 01 A9 C2 F1  |..:4....|
[24-6月 -2018 12:49:51:528] nspsend: C7 08 06 50 2B BB C4 5E  |...P+..^|
[24-6月 -2018 12:49:51:528] nspsend: C0 80 D7 72 E4 D8 C0 B6  |...r....|
[24-6月 -2018 12:49:51:528] nspsend: C4 31 90 9A 3C 83 B0 16  |.1..<...|
[24-6月 -2018 12:49:51:528] nspsend: D1 AE 82 56 39 46 08 20  |...V9F..|
[24-6月 -2018 12:49:51:528] nspsend: DE D2 DC 6B BC 5F BF 7E  |...k._.~|
[24-6月 -2018 12:49:51:528] nspsend: 25 2A 31 D7 A3 60 CE 7A  |%*1..`.z|
[24-6月 -2018 12:49:51:528] nspsend: 42 58 0A 43 11 F5 D6 0A  |BX.C....|
[24-6月 -2018 12:49:51:528] nspsend: 31 C8 96 38 F3 C2 90 6A  |1..8...j|
[24-6月 -2018 12:49:51:528] nspsend: 64 50 46 B0 A2 EF 1E 9A  |dPF.....|
[24-6月 -2018 12:49:51:528] nspsend: 86 11 67 C9 9B CD 8C 2B  |..g....+|
[24-6月 -2018 12:49:51:528] nspsend: 2A 02 0D 9B C3 C5 D3 23  |*......#|
[24-6月 -2018 12:49:51:528] nspsend: 75 4C 4A 5B A3 85 80 C5  |uLJ[....|
[24-6月 -2018 12:49:51:528] nspsend: FA F0 6C C3 23 72 D5 28  |..l.#r.(|
[24-6月 -2018 12:49:51:528] nspsend: 0E 16 C7 C8 1B 3D CC B8  |.....=..|
[24-6月 -2018 12:49:51:528] nspsend: 06 FA D7 FB 03 EB E6 41  |.......A|
[24-6月 -2018 12:49:51:528] nspsend: 05 54 B0 5A 18 CC 7F E7  |.T.Z....|
[24-6月 -2018 12:49:51:528] nspsend: 2D 36 C4 4A E6 B2 7F F6  |-6.J....|
[24-6月 -2018 12:49:51:528] nspsend: 1E 10 5B 20 CF 60 FA D3  |..[..`..|
[24-6月 -2018 12:49:51:528] nspsend: 6E B1 F7 9E 35 92 27 BA  |n...5.'.|
[24-6月 -2018 12:49:51:528] nspsend: 9A 4A F1 00 01           |.J...   |
[24-6月 -2018 12:49:51:528] nspsend: 277 bytes to transport
[24-6月 -2018 12:49:51:528] nspsend: normal exit

----接收数据
[24-6月 -2018 12:49:51:528] nttrd: exit
[24-6月 -2018 12:49:51:528] nsprecv: 262 bytes from transport
[24-6月 -2018 12:49:51:528] nsprecv: tlen=262, plen=262, type=6
[24-6月 -2018 12:49:51:528] nsprecv: packet dump
[24-6月 -2018 12:49:51:528] nsprecv: 01 06 00 00 06 00 00 00  |........|
[24-6月 -2018 12:49:51:528] nsprecv: 00 00 63 2C 04 99 D8 25  |..c,...%|
[24-6月 -2018 12:49:51:528] nsprecv: 40 38 A0 30 AE 3D 24 05  |@8.0.=$.|
[24-6月 -2018 12:49:51:528] nsprecv: 97 E4 70 E9 1D 76 8B A0  |..p..v..|
[24-6月 -2018 12:49:51:528] nsprecv: 38 AD 7E D3 B1 A1 BD B7  |8.~.....|
[24-6月 -2018 12:49:51:528] nsprecv: 29 1F 0C 19 9A 0B FD D0  |).......|
[24-6月 -2018 12:49:51:528] nsprecv: F3 13 51 E0 78 C2 7C 7D  |..Q.x.|}|
[24-6月 -2018 12:49:51:528] nsprecv: 37 BC AA 25 23 20 FF 05  |7..%#...|
[24-6月 -2018 12:49:51:528] nsprecv: E0 F6 AF C3 53 C9 50 2F  |....S.P/|
[24-6月 -2018 12:49:51:528] nsprecv: 68 0D F1 CB CE B8 90 6B  |h......k|
[24-6月 -2018 12:49:51:528] nsprecv: 90 CC B2 B5 DF D8 C3 BC  |........|
[24-6月 -2018 12:49:51:529] nsprecv: F0 7A 37 E7 1B FA 3E 6B  |.z7...>k|
[24-6月 -2018 12:49:51:529] nsprecv: 13 90 7A 10 1C 6D C5 40  |..z..m.@|
[24-6月 -2018 12:49:51:529] nsprecv: BC E0 B9 4F 69 10 49 4D  |...Oi.IM|
[24-6月 -2018 12:49:51:529] nsprecv: B9 78 2E 28 B3 8C 05 53  |.x.(...S|
[24-6月 -2018 12:49:51:529] nsprecv: 18 99 B2 AF 46 AE 1D D7  |....F...|
[24-6月 -2018 12:49:51:529] nsprecv: 0E 19 56 28 7A B6 16 72  |..V(z..r|
[24-6月 -2018 12:49:51:529] nsprecv: 46 57 C9 7A 1C DB D1 A2  |FW.z....|
[24-6月 -2018 12:49:51:529] nsprecv: A2 35 B7 DD 63 EA 5E 07  |.5..c.^.|
[24-6月 -2018 12:49:51:529] nsprecv: F9 E1 4E 54 D0 57 63 9D  |..NT.Wc.|
[24-6月 -2018 12:49:51:529] nsprecv: 12 B0 7B 6F 0C DC 98 90  |..{o....|
[24-6月 -2018 12:49:51:529] nsprecv: C1 71 3B BD DA 27 03 CE  |.q;..'..|
[24-6月 -2018 12:49:51:529] nsprecv: 4B FA 5D 64 31 17 D1 CC  |K.]d1...|
[24-6月 -2018 12:49:51:529] nsprecv: 49 A7 A7 47 D8 26 81 23  |I..G.&.#|
[24-6月 -2018 12:49:51:529] nsprecv: BC 9E 54 76 C9 98 07 CF  |..Tv....|
[24-6月 -2018 12:49:51:529] nsprecv: CF 97 A4 70 57 68 80 16  |...pWh..|
[24-6月 -2018 12:49:51:529] nsprecv: 45 14 3D 32 06 3E 1A 06  |E.=2.>..|
[24-6月 -2018 12:49:51:529] nsprecv: 0A D6 8F 51 29 D3 A4 2E  |...Q)...|
[24-6月 -2018 12:49:51:529] nsprecv: 06 0C 03 B1 7A D1 5B 3B  |....z.[;|
[24-6月 -2018 12:49:51:529] nsprecv: 22 9A 6B 0F CD F7 EA 8C  |".k.....|
[24-6月 -2018 12:49:51:529] nsprecv: D7 8C CE F8 B6 9E 80 01  |........|
[24-6月 -2018 12:49:51:529] nsprecv: 95 1A D8 35 31 84 D6 42  |...51..B|
[24-6月 -2018 12:49:51:529] nsprecv: 7C CC 2D 31 00 01        ||.-1..  |
[24-6月 -2018 12:49:51:529] nsprecv: normal exit

这里可以发现,通过配置相关传输加密之后,客户端trace看到的已经是加密之后的数据,也就是说这样可以确保数据传输安全,网络上就算捕获这些包,也无法知道应用端和数据库端交互的内容.

补充说明
1. ENCRYPTION_SERVER和ENCRYPTION_CLIENT参数对应关系

2. ENCRYPTION_TYPES_SERVER和ENCRYPTION_TYPES_CLIENT采用加密算法选择,可以选择adapters查看到的一种或者多种,默认为支持所有加密算法
3. 对于jdbc应用来说,可以参考下列配置方式

import oracle.jdbc.OracleConnection;
import oracle.jdbc.pool.OracleDataSource;
import java.sql.*;
import java.util.*;

class Employee1{
public static void main (String args []) throws Exception
{
OracleDataSource ods = new OracleDataSource();
Properties props = new Properties();

props.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_ENCRYPTION_LEVEL, "REQUIRED");
props.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_ENCRYPTION_TYPES, "(AES256,AES192,AES128)");

ods.setURL("jdbc:oracle:thin:@//yourHost:port/dbServiceName");
ods.setUser("scott");
ods.setPassword("tiger");
ods.setConnectionProperties(props);
Connection conn = ods.getConnection();

// Create a Statement
Statement stmt = conn.createStatement ();
// Select the ENAME column from the EMP table
ResultSet rset = stmt.executeQuery ("select ENAME from EMP");

// Iterate through the result and print the employee names
while (rset.next ())
System.out.println (rset.getString (1));

rset.close();
stmt.close();
conn.close();
}
}

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