security-scripts/test_ssl_handshake.sh at master · PeterMosmans/security-scripts · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

#!/usr/bin/env bash

# test_ssl_handshake - Tests SSL/TLS handshakes

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

NAME="test_ssl_handshake"

BUGSTRING='(ssl handshake failure|sslv3 alert unexpected message|sslv3 alert illegal parameter)'

#statuses

declare SUCCESS=0

declare ERR_PREREQUISITES=100

declare ERR_NOTDETECTED=101

declare NONEWLINE=1

# logging and verboseness (v1.0)

declare NOLOGFILE=-1

declare QUIET=1

declare STDOUT=2

declare VERBOSE=4

declare LOGFILE=8

declare RAWLOGS=16

declare SEPARATELOGS=32

#defaults

DEFAULTSTART=125

DEFAULTSTRING="ALL:!PSK:!SRP"

DEFAULTPROTOCOL="-ssl2 -ssl3 -tls1"

EXTRAPARMS="-quiet -verify 0 -connect"

# colours (v1.0)

declare BLUE='\E[1;49;96m' LIGHTBLUE='\E[2;49;96m'

declare RED='\E[1;49;31m' LIGHTRED='\E[2;49;31m'

declare GREEN='\E[1;49;32m' LIGHTGREEN='\E[2;49;32m'

declare RESETSCREEN='\E[0m'

# temporary file - just in case it's needed for debugging purposes

STATUSREPORT=${TMP}/status

# global variables

cipherfile=

cipherlist=

defaultoption=true

faultyciphers=

force=false

iterate=false

loglevel=0

start=0

total=0

# bug tests

bug128=false

bugrsa=false

bugintolerant=false

# define functions: first the bug tests

# Handshake fails when the tls1_2 protocol and 128 or more ciphers are specified,

# but is successful with tls1_2 and 127 or less ciphers

bug_128_cipherlimit() {

load_ciphers "-tls1" ""

prettyprint "testing for 128 cipherlimit" $BLUE

local bug=128

local protocol="-tls1_2"

local start=126

local try=10

let end=$(echo ${cipherlist} | tr ':' ' ' | wc -w)

[[ ${end} -gt $((start+try)) ]] && let end=$((start+try))

if [[ ${end} -le ${bug} ]]; then

prettyprint "FAILED TEST: need at least ${bug} ciphersuites to test" $GREEN

return ${ERR_PREREQUISITES}

add_ciphers ${start} ${cipherlist} ${protocol} ${end}

successful=$?

if [[ ${successful} -ne ${bug} ]]; then

prettyprint "FAILED TEST: tried ${successful} ciphers" $GREEN

return ${ERR_NOTDETECTED}

echo "shuffling order of ciphers"

cipherlist=$(echo ${cipherlist} | tr ':' '\n'| shuf | tr '\n' ':'| sed -e 's/:$//' 1>/dev/stdout)

add_ciphers ${start} ${cipherlist} ${protocol} ${end}

successful=$?

if [[ ${successful} -ne ${bug} ]]; then

prettyprint "FAILED TEST: tried ${successful} ciphers" $GREEN

return ${ERR_NOTDETECTED}

prettyprint "SUCCESS: 128 cipherlimit detected" $RED

}

# Handshake fails when aRSA ciphers are specified first,

# but is successful with the default ordering

bug_rsa_order() {

load_ciphers "" 'ALL'

local protocol="-ssl3"

local tests=3

prettyprint "testing for RSA order sensitivity" $BLUE

echo "test 1 of ${tests} - using cipherstring ALL"

echo Q | $openssl s_client ${protocol} -cipher ${cipherlist} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

parse_status ${STATUSREPORT}

if [[ $? -ne ${SUCCESS} ]]; then

prettyprint "FAILED TEST: handshake failed" $GREEN

return ${ERR_NOTDETECTED}

load_ciphers "" 'ALL:+aRSA'

echo "test 2 of ${tests} - using cipherstring ALL:+aRSA"

echo Q | $openssl s_client ${protocol} -cipher ${cipherlist} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

parse_status ${STATUSREPORT}

if [[ $? -eq ${SUCCESS} ]]; then

prettyprint "FAILED TEST: handshake successful" $GREEN

return ${ERR_NOTDETECTED}

load_ciphers "" 'ALL:aRSA'

echo "test 3 of ${tests} - using cipherstring ALL:aRSA"

echo Q | $openssl s_client ${protocol} -cipher ${cipherlist} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

parse_status ${STATUSREPORT}

if [[ $? -ne ${SUCCESS} ]]; then

prettyprint 'FAILED TEST: handshake failed when testing cipherstring ALL:aRSA' $GREEN

return ${ERR_NOTDETECTED}

prettyprint "SUCCESS: RSA order sensitivity detected" $RED

return 0

}

# Handshake fails without connecting without specifying TLS protocol,

# but is successful when a TLS protocol is specified

bug_intolerant() {

local protocols="-tls1_2 -tls1_1 -tls1 -ssl3 -ssl2"

local succeeded=""

local counter=1

local tests=$(($(echo ${protocols}|wc -w)+1))

prettyprint "testing for version intolerant server (using previously loaded cipherstring)" $BLUE

echo -n "test ${counter} of ${tests} - connect without a protocol specified "

# check if default connection fails

echo Q | $openssl s_client ${protocol} -cipher ${cipherlist} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

_=$(parse_status ${STATUSREPORT})

if [[ $? -eq ${SUCCESS} ]]; then

echo ""

prettyprint "FAILED TEST: handshake successful" $GREEN

return ${ERR_NOTDETECTED}

echo "handshake failed"

# check if connection is successful with one of the protocols

for protocol in ${protocols}; do

let counter=${counter}+1

echo -n "test ${counter} of ${tests} - connect with ${protocol} "

echo Q | $openssl s_client ${protocol} -cipher ${cipherlist} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

_=$(parse_status ${STATUSREPORT})

if [[ $? -eq ${SUCCESS} ]]; then

succeeded=${protocol}

prettyprint "SUCCESS: handshake successful" $RED

else

echo "handshake failed"

done

if [ -z ${succeeded} ]; then

prettyprint "FAILED TEST: could not connect with any of the protocols ${protocols}" $GREEN

return ${ERR_NOTDETECTED}

prettyprint "SUCCESS: version intolerant server detected" $RED

}

# ...then the general functions

cleanup() {

rm -f ${STATUSREPORT} 1>/dev/null

if [[ ! -z ${faultyciphers} ]]; then

echo "faulty cipherlist: "

echo ${faultyciphers}

}

# returns number of successful ciphers

add_ciphers() {

local start=$1

local cipherlist=$2

local protocol=$3

local finish=${4:-$(echo ${cipherlist} | tr ':' ' ' | wc -w)}

echo "Adding ${start} to ${finish} ciphersuites"

for ((c=${start}; c<=${finish}; c++ )); do

[[ $c -gt $start ]] && echo "total number of ciphers ${c} - cipher added: $(echo ${cipherlist} | cut --delimiter=":" -f$c)"

(($loglevel&$VERBOSE)) && echo "${openssl} s_client -cipher $(echo ${cipherlist} | cut --delimiter=":" -f1-$c) ${protocol} ${EXTRAPARMS} ${host}"

echo Q | $openssl s_client -cipher $(echo ${cipherlist} | cut --delimiter=":" -f1-$c) ${protocol} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

parse_status ${STATUSREPORT}

[[ $? -ne 0 ]] && return $c

done

return $((c-1))

}

# returns number of successful ciphers

iterate_ciphers() {

local start=$1

local cipherlist=$2

local total=$(echo ${cipherlist} | tr ':' ' ' | wc -w)

echo "${start} ${cipherlist} ${total}"

for ((c=${start}; c<=${total}; c++ )); do

local cipher=$(echo ${cipherlist} | cut --delimiter=":" -f$c)

echo -n "testing cipher ${c} - ${cipher} "

rm -f ${STATUSREPORT} 1>/dev/null

(($loglevel&$VERBOSE)) && echo "$openssl s_client -cipher ${cipher} ${EXTRAPARMS} ${host}"

echo Q | $openssl s_client -cipher ${cipher} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

parse_status ${STATUSREPORT}

if [[ $? -ne ${SUCCESS} ]]; then

[[ ${counter} == ${bug} ]] && return ${counter}

[[ ! ${force} ]] && return ${counter}

prettyprint "handshake failed" $RED $NONEWLINE

echo ", adding ${cipher} to the list of faulty ciphers"

[[ ! -z ${faultyciphers} ]] && faultyciphers="${faultyciphers}:"

faultyciphers="${faultyciphers}${cipher}"

else

prettyprint "handshake successful" $GREEN

done

return $((c-1))

}

load_ciphers() {

local protocol={$1:-$DEFAULTPROTOCOL}

local cipherstring=${2:-$DEFAULTSTRING}

if [[ ! -z $2 ]]; then

(($loglevel&$VERBOSE)) && echo "loading custom cipherstring ${2}"

if [[ ! -z ${cipherfile} ]] && [[ -f ${cipherfile} ]]; then

# cipherstring expects : as delimiters, check if they're present..

if grep -vq ":" ${cipherfile}; then

# is it a multiple-column file ? if so, only use first column

if grep -q "=" ${cipherfile}; then

cipherlist=$(awk '{print $1}' ${cipherfile} | tr '\n' ':' | sed -e 's/:$//' 1>/dev/stdout)

else

# replace newline characters with :

cipherlist=$(tr '\n' ':' < ${cipherfile} | sed -e 's/:$//')

else

cipherlist=$(cat ${cipherfile})

else

(($loglevel&$VERBOSE)) && echo "reading cipherlist from ${openssl} and cipherstring ${cipherstring}"

cipherlist=$(${openssl} ciphers ${protocol} -l ${cipherstring})

totalciphers=$(echo ${cipherlist} | tr ':' ' ' | wc -w)

(($loglevel&$VERBOSE)) && echo "loaded ${totalciphers} ciphers"

}

main() {

startup "$@"

load_ciphers "${protocol}" "${cipherstring}"

test_connection ${cipherlist} ${protocol}

${bugintolerant} && bug_intolerant

${bug128} && bug_128_cipherlimit

${bugrsa} && bug_rsa_order

if ${iterate}; then

iterate_ciphers "${start}" "${cipherlist}"

echo ${faultyciphers}

# else

# add_ciphers

# fi

}

parse_status() {

(($loglevel&$VERBOSE)) && show_statusreport $1

if grep -qiE "no ciphers available" $1; then

echo "cipher not supported by server"

return 0

if grep -qiE "no cipher match" $1; then

echo "cipher locally not supported by ${openssl}"

return 0

if grep -qiE "ssl handshake failure" $1; then

echo "SSL handshake error detected"

(($loglevel&$VERBOSE)) && show_statusreport $1

return 1

if grep -qiE "${BUGSTRING}" $1; then

echo "SSL error detected"

show_statusreport $1

return 1

}

# prettyprint (v1.0)

prettyprint() {

(($loglevel&$QUIET)) && return

[[ -z $nocolor ]] && echo -ne $2

if [[ "$3" == "$NONEWLINE" ]]; then

echo -n "$1"

else

echo "$1"

[[ -z $nocolor ]] && echo -ne ${RESETSCREEN}

}

show_statusreport() {

echo "status report from server:"

grep -iv "loading" $1|awk 'FS=":"{print $6}'

grep -iv "loading" $1

}

startup() {

prettyprint "$NAME starting on $(date +%d-%m-%Y' at '%R)" $BLUE

prettyprint "BETA VERSION - bugs are present and not all features are correctly implemented" $RED

trap cleanup EXIT QUIT

if ! options=$(getopt -o :fv -l 128,ciphers:,cipherstring:,force,intolerant,iterate,openssl:,rsa,start:,verbose -- "$@") ; then

usage

exit 1

eval set -- $options

if [[ "$#" -le 1 ]]; then

usage

exit 1

while [[ $# -gt 0 ]]; do

case $1 in

--128)

bug128=true

defaultoption=false;;

--ciphers)

cipherfile=$2

shift;;

--cipherstring)

cipherstring=$2

shift;;

-f|--force)

force=true;;

--intolerant)

bugintolerant=true

defaultoption=false;;

--iterate)

iterate=true

defaultoption=false;;

--openssl)

openssl=$2

shift;;

--rsa)

bugrsa=true

defaultoption=false;;

--start)

start=$2

shift;;

-v|--verbose)

let "loglevel=loglevel|$VERBOSE";;

(--) shift;

break;;

(-*) echo "$0: unrecognized option $1" 1>&2; exit 1;;

(*) break;;

esac

shift

done

openssl=${openssl:-$(which openssl)}

if ! [[ -f ${openssl} ]]; then

echo "could not find ${openssl}... exiting"

exit 1

if [ -z $1 ]; then

usage

exit 0

# add default port number ?

if [[ $1 =~ .*:[0-9]+$ ]]; then

host=$1

else

host=$1:443

if ${defaultoption}; then

bug128=true

bugrsa=true

bugintolerant=true

}

test_connection() {

local cipherlist=$1

local protocol=$2

echo "first trying to connect to ${host} using ${totalciphers} ciphers..."

echo Q | ${openssl} s_client -cipher ${cipherlist} ${protocol} ${EXTRAPARMS} ${host} 1>/dev/null 2>${STATUSREPORT}

if grep -qiE "(connect:errno|ssl handhake failure|no cipher match)" ${STATUSREPORT}; then

echo "could not connect to ${host} with all ciphers... exiting"

exit 1

parse_status ${STATUSREPORT}

if [[ $? -eq 0 ]]; then

echo "no issues detected"

}

usage() {

local realpath=$(dirname $(readlink -f $0))

if [[ -d $realpath/.git ]]; then

pushd $realpath 1>/dev/null 2>&1

local branch=$(git rev-parse --abbrev-ref HEAD)

local commit=$(git log|head -1|awk '{print $2}'|cut -c -10)

popd 1>/dev/null

prettyprint "$NAME (git)" $BLUE $NONEWLINE

echo " from ${branch} branch commit ${commit}"

else

prettyprint "$NAME version $VERSION" $BLUE

prettyprint " Licensed under the GPL 3.0" $LIGHTBLUE

echo ""

echo "tests SSL/TLS handshakes (for known bugs)"

echo ""

echo "usage: $0 target[:port]"

echo ""

echo " --start=NUMBER number of ciphers to start with"

echo " --ciphers=FILE a file containing a list which ciphers to use"

echo " --cipherstring=CIPHERSTRING"

echo " cipherstring (default ${cipherstring})"

echo " -f | --force continue even though the error has been detected"

echo " --total=NUMBER number of ciphers to test"

echo " --iterate iterate through all the ciphers instead of adding"

echo " --openssl=FILE location of openssl (default ${openssl})"

echo " -v | --verbose be more verbose, please"

echo ""

echo " tests:"

echo " --128 test for 128 cipherlimit"

echo " --intolerant test for version intolerant server"

echo " --rsa test for RSA order sensitivity"

echo ""

echo " by default, all tests will be performed"

echo ""

echo "BETA VERSION - bugs are present and not all features are correctly implemented"

}

main "$@"

security-scripts/test_ssl_handshake.sh at master · PeterMosmans/security-scripts · GitHub

Repository navigation

Expand file tree

Breadcrumbs

test_ssl_handshake.sh

Latest commit

History

Breadcrumbs

test_ssl_handshake.sh

File metadata and controls