"{ Package: 'stx:goodies/regression' }"

"{ NameSpace: RegressionTests }"

TestCase subclass:#CryptTests

	instanceVariableNames:''

	classVariableNames:'LibCryptLoaded'

	poolDictionaries:''

	category:'tests-Regression-Files and Encodings'

!

!CryptTests class methodsFor:'documentation'!

documentation

"

    documentation to be added.

    [author:]

	exept

    [instance variables:]

    [class variables:]

    [see also:]

"

! !

!CryptTests class methodsFor:'initialization'!

initialize

    "Invoked at system start or when the class is dynamically loaded."

    LibCryptLoaded := false.

    "Modified: / 03-03-2014 / 12:05:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified (comment): / 06-11-2018 / 10:33:59 / Claus Gittinger"

! !

!CryptTests class methodsFor:'utilities'!

loadLibcryptIfAvailable

    "raise an error: this method should be implemented (TODO)"

    LibCryptLoaded ifFalse:[

        (Smalltalk at: #'exept_libcrypt') isNil ifTrue:[

            [

                Smalltalk loadPackage: #'exept:libcrypt'.

            ] on: PackageLoadError do:[:ex |

                "/ Libcrypt not not available.

            ].

        ].

        LibCryptLoaded := (Smalltalk at: #'exept_libcrypt') notNil.

    ].

    "Created: / 03-03-2014 / 12:03:54 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 06-11-2018 / 10:33:48 / Claus Gittinger"

! !

!CryptTests methodsFor:'initialize / release'!

setUp

    "common setup - invoked before testing."

    self class loadLibcryptIfAvailable.

    "Modified: / 03-03-2014 / 12:03:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

tearDown

    "common cleanup - invoked after testing."

    super tearDown

! !

!CryptTests methodsFor:'tests'!

test01_crc32

    |h|

    h := CRC32Stream hashValueOf:''.

    self assert:(h = 0).

    h := CRC32Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = 16r414fa339).

    h := CRC32Stream hashValueOf:'resume'.

    self assert:(h = 16r60C1D0A0).

    h := (CRC32Stream new

		    nextPut:$r;

		    nextPut:$e;

		    nextPut:$s;

		    nextPut:$u;

		    nextPut:$m;

		    nextPut:$e;

		    hashValue).

    self assert:(h = 16r60C1D0A0).

    h := (CRC32Stream hashValueOf:#[1 2 3 4 5 6 7]).

    self assert:(h = 16r70E46888).

    h := (CRC32Stream hashValueOf:#[16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF

	     16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF

	     16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF

	     16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF 16rFF]).

    self assert:(h = 16r8CD04C73).

    h := (CRC32Stream new

		    next:100000 putAll:'12345678901234567890123456789012345678901234567890';

		    hashValue).

    self assert:(h = 16r86D7D79A).

    "

     self run:#test01_crc32

     self new test01_crc32

    "

!

test02_md5

    |h s|

    h := MD5Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'d41d8cd98f00b204e9800998ecf8427e')).

    h := MD5Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'9e107d9d372bb6826bd81d3542a419d6')).

    h := MD5Stream hashValueOf:'abc'.

    self assert:(h = #[16r90 16r01 16r50 16r98 16r3C 16rD2 16r4F 16rB0

                       16rD6 16r96 16r3F 16r7D 16r28 16rE1 16r7F 16r72]).

    s := MD5Stream new.

    s nextPutByte:$a codePoint.

    s nextPutByte:$b codePoint.

    s nextPutByte:$c codePoint.

    self assert:(s hashValue = #[16r90 16r01 16r50 16r98 16r3C 16rD2 16r4F 16rB0

                       16rD6 16r96 16r3F 16r7D 16r28 16rE1 16r7F 16r72]).

    s := MD5Stream new.

    s nextPut:$a.

    s nextPut:$b.

    s nextPut:$c.

    self assert:(s hashValue = #[16r90 16r01 16r50 16r98 16r3C 16rD2 16r4F 16rB0

                       16rD6 16r96 16r3F 16r7D 16r28 16rE1 16r7F 16r72]).

    s := MD5Stream new.

    s nextPutAll:'abc'.

    self assert:(s hashValue = #[16r90 16r01 16r50 16r98 16r3C 16rD2 16r4F 16rB0

                       16rD6 16r96 16r3F 16r7D 16r28 16rE1 16r7F 16r72]).

    s := MD5Stream new.

    s nextPutAll:'abc' asByteArray.

    self assert:(s hashValue = #[16r90 16r01 16r50 16r98 16r3C 16rD2 16r4F 16rB0

                       16rD6 16r96 16r3F 16r7D 16r28 16rE1 16r7F 16r72]).

    h := MD5Stream hashValueOf:'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'.

    self assert:(h = #[16r82 16r15 16rEF 16r07 16r96 16rA2 16r0B 16rCA

                       16rAA 16rE1 16r16 16rD3 16r87 16r6C 16r66 16r4A]).

    h := (MD5Stream new

                next:1000000 put:$a;

                hashValue).

    self assert:(h = #[16r77 16r07 16rD6 16rAE 16r4E 16r02 16r7C 16r70

                       16rEE 16rA2 16rA9 16r35 16rC2 16r29 16r6F 16r21]).

    "

     self run:#test02_md5

     self new test02_md5

    "

    "Modified: / 23-03-2019 / 15:23:42 / Claus Gittinger"

!

test03_sha1

    |h s|

    "/ test vectors from https://www.di-mgt.com.au/sha_testvectors.html

    "/ and others

    h := SHA1Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'da39a3ee5e6b4b0d3255bfef95601890afd80709')).

    h := SHA1Stream hashValueOf:'abc'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d')).

    s := SHA1Stream new.

    s nextPutByte:$a codePoint.

    s nextPutByte:$b codePoint.

    s nextPutByte:$c codePoint.

    self assert:(s hashValue = (ByteArray fromHexStringWithSeparators:'a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d')).

    s := SHA1Stream new.

    s nextPut:$a.

    s nextPut:$b.

    s nextPut:$c.

    self assert:(s hashValue = (ByteArray fromHexStringWithSeparators:'a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d')).

    s := SHA1Stream new.

    s nextPutAll:'abc'.

    self assert:(s hashValue = (ByteArray fromHexStringWithSeparators:'a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d')).

    s := SHA1Stream new.

    s nextPutAll:'abc' asByteArray.

    self assert:(s hashValue = (ByteArray fromHexStringWithSeparators:'a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d')).

    h := SHA1Stream hashValueOf:'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'84983e44 1c3bd26e baae4aa1 f95129e5 e54670f1')).

    h := SHA1Stream hashValueOf:'abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'a49b2446 a02c645b f419f995 b6709125 3a04a259')).

    h := SHA1Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'2fd4e1c67a2d28fced849ee1bb76e7391b93eb12')).

    h := SHA1Stream hashValueOf:#[16r00 16r01 16r02 16r40 16r08 16r10 16r20 16r40 16r80

                                  16rFF 16rFE 16rFC 16rF8 16rF0 16rE0 16rC0 16r80].

    self assert:(h = #[146 31 26 53 78 167 121 73 144 117 145 88 50 42 25 52 53 37 177 73]).

    h := SHA1Stream hashValueOf:(String new:1000000 withAll:$a).

    self assert:(h = (ByteArray fromHexStringWithSeparators:'34aa973c d4c4daa4 f61eeb2b dbad2731 6534016f')).

    h := SHA1Stream hashValueOf:#[48 130 2 149 160 3 2 1 2 2 1 6 48 13 6 9 42 134 72 134 247 13 1 1 5 5 0 48 111 49 25 48 23 6 3 85 4 3 19 16 69 120 101 112 116 32 76 101 118 101 108 32 50 32 67 65 49 11 48 9 6 3 85 4 6 19 2 68 69 49 26 48 24 6 3 85 4 10 19 17 69 120 101 112 116 32 83 111 102 116 119 97 114 101 32 65 71 49 11 48 9 6 3 85 4 11 19 2 67 65 49 28 48 26 6 9 42 134 72 134 247 13 1 9 1 22 13 99 101 114 116 64 101 120 101 112 116 46 100 101 48 30 23 13 48 56 48 52 50 50 50 48 48 48 48 48 90 23 13 49 54 48 54 48 49 49 57 53 57 53 57 90 48 72 49 11 48 9 6 3 85 4 6 19 2 68 69 49 26 48 24 6 3 85 4 10 19 17 69 120 101 112 116 32 83 111 102 116 119 97 114 101 32 65 71 49 29 48 27 6 3 85 4 3 19 20 101 120 112 101 99 99 111 32 99 111 100 101 32 115 105 103 110 105 110 103 48 129 159 48 13 6 9 42 134 72 134 247 13 1 1 1 5 0 3 129 141 0 48 129 137 2 129 129 0 199 150 115 153 147 36 175 136 129 9 92 77 196 254 201 72 55 141 131 27 57 64 226 5 191 35 239 72 236 142 151 98 19 209 37 164 153 24 185 170 82 62 223 250 229 224 59 238 40 73 29 84 83 109 2 188 117 254 37 86 32 136 145 32 255 118 90 26 62 76 137 45 196 88 220 234 231 81 63 165 29 158 212 132 117 227 250 68 249 54 42 54 69 145 185 217 234 66 192 205 240 247 173 215 243 64 30 52 116 19 113 47 189 90 216 64 241 30 193 187 185 219 5 35 231 222 30 183 2 3 1 0 1 163 129 254 48 129 251 48 9 6 3 85 29 19 4 2 48 0 48 29 6 3 85 29 14 4 22 4 20 142 53 132 147 2 27 121 108 9 10 151 194 20 232 134 227 84 160 251 55 48 129 153 6 3 85 29 35 4 129 145 48 129 142 128 20 36 157 29 207 97 136 114 233 22 165 218 37 28 117 161 157 224 230 74 178 161 115 164 113 48 111 49 25 48 23 6 3 85 4 3 19 16 69 120 101 112 116 32 76 101 118 101 108 32 49 32 67 65 49 11 48 9 6 3 85 4 6 19 2 68 69 49 26 48 24 6 3 85 4 10 19 17 69 120 101 112 116 32 83 111 102 116 119 97 114 101 32 65 71 49 11 48 9 6 3 85 4 11 19 2 67 65 49 28 48 26 6 9 42 134 72 134 247 13 1 9 1 22 13 99 101 114 116 64 101 120 101 112 116 46 100 101 130 1 2 48 11 6 3 85 29 15 4 4 3 2 7 128 48 19 6 3 85 29 37 4 12 48 10 6 8 43 6 1 5 5 7 3 3 48 17 6 9 96 134 72 1 134 248 66 1 1 4 4 3 2 4 16].

    self assert:(h = #[152 185 22 239 129 56 192 23 215 67 254 147 139 91 251 28 96 142 185 186]).

    "

     self run:#test03_sha1

     self new test03_sha1

    "

    "Modified: / 25-11-2013 / 11:42:46 / cg"

    "Modified: / 23-03-2019 / 15:22:29 / Claus Gittinger"

!

test04_md2

    |h|

    self

	skipIf:(MD2Stream isBehavior not or:[MD2Stream isLoaded not])

	description:'MD2Stream/libcrypt is not loaded'.

    h := MD2Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'8350e5a3e24c153df2275c9f80692773')).

    h := MD2Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'03d85a0d629d2c442e987525319fc471')).

    "

     self run:#test04_md2

     self new test04_md2

    "

!

test05_md4

    |h|

    self

	skipIf:(MD4Stream isBehavior not or:[MD4Stream isLoaded not])

	description:'MD4Stream/libcrypt is not loaded'.

    h := MD4Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'31d6cfe0d16ae931b73c59d7e0c089c0')).

    h := MD4Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'1bee69a46ba811185c194762abaeae90')).

    "

     self run:#test05_md4

     self new test05_md4

    "

!

test06_sha256

    |h|

    "/ test vectors from https://www.di-mgt.com.au/sha_testvectors.html

    "/ and others

    self

        skipIf:(SHA256Stream isBehavior not or:[SHA256Stream isLoaded not])

        description:'SHA256Stream/libcrypt is not loaded'.

    h := SHA256Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855')).

    h := SHA256Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592')).

    h := SHA256Stream hashValueOf:'abc'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'ba7816bf 8f01cfea 414140de 5dae2223 b00361a3 96177a9c b410ff61 f20015ad')).

    h := SHA256Stream hashValueOf:'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'248d6a61 d20638b8 e5c02693 0c3e6039 a33ce459 64ff2167 f6ecedd4 19db06c1')).

    h := SHA256Stream hashValueOf:'abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'cf5b16a7 78af8380 036ce59e 7b049237 0b249b11 e8f07a51 afac4503 7afee9d1')).

    h := SHA256Stream hashValueOf:(String new:1000000 withAll:$a).

    self assert:(h = (ByteArray fromHexStringWithSeparators:'cdc76e5c 9914fb92 81a1c7e2 84d73e67 f1809a48 a497200e 046d39cc c7112cd0')).

    "

     self run:#test06_sha256

     self new test06_sha256

    "

    "Modified: / 22-03-2019 / 12:35:28 / Claus Gittinger"

!

test07_sha224

    |h|

    "/ test vectors from 

    "/     https://www.di-mgt.com.au/sha_testvectors.html

    "/     ftp://ftp.rfc-editor.org/in-notes/rfc3874.txt 

    "/ and others

    self

        skipIf:(SHA224Stream isBehavior not or:[SHA224Stream isLoaded not])

        description:'SHA224Stream/libcrypt is not loaded'.

    h := SHA224Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f')).

    h := SHA224Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525')).

    h := SHA224Stream hashValueOf:'abc'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'23097d22 3405d822 8642a477 bda255b3 2aadbce4 bda0b3f7 e36c9da7')).

    h := SHA224Stream hashValueOf:'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'75388b16 512776cc 5dba5da1 fd890150 b0c6455c b4f58b19 52522525')).

    h := SHA224Stream hashValueOf:'abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'c97ca9a5 59850ce9 7a04a96d ef6d99a9 e0e0e2ab 14e6b8df 265fc0b3')).

    h := SHA224Stream hashValueOf:(String new:1000000 withAll:$a).

    self assert:(h = (ByteArray fromHexStringWithSeparators:'20794655 980c91d8 bbb4c1ea 97618a4b f03f4258 1948b2ee 4ee7ad67')).

    "

     self run:#test07_sha224

     self new test07_sha224

    "

    "Modified (format): / 24-03-2019 / 10:10:39 / Claus Gittinger"

!

test08_sha384

    |h|

    "/ test vectors from https://www.di-mgt.com.au/sha_testvectors.html

    "/ and others

    self

        skipIf:(SHA384Stream isBehavior not or:[SHA384Stream isLoaded not])

        description:'SHA384Stream/libcrypt is not loaded'.

    h := SHA384Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b')).

    h := SHA384Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'ca737f1014a48f4c0b6dd43cb177b0afd9e5169367544c494011e3317dbf9a509cb1e5dc1e85a941bbee3d7f2afbc9b1')).

    h := SHA384Stream hashValueOf:'abc'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'cb00753f45a35e8b b5a03d699ac65007 272c32ab0eded163 1a8b605a43ff5bed 8086072ba1e7cc23 58baeca134c825a7')).

    h := SHA384Stream hashValueOf:'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'3391fdddfc8dc739 3707a65b1b470939 7cf8b1d162af05ab fe8f450de5f36bc6 b0455a8520bc4e6f 5fe95b1fe3c8452b')).

    h := SHA384Stream hashValueOf:'abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'09330c33f71147e8 3d192fc782cd1b47 53111b173b3b05d2 2fa08086e3b0f712 fcc7c71a557e2db9 66c3e9fa91746039')).

    h := SHA384Stream hashValueOf:(String new:1000000 withAll:$a).

    self assert:(h = (ByteArray fromHexStringWithSeparators:'9d0e1809716474cb 086e834e310a4a1c ed149e9c00f24852 7972cec5704c2a5b 07b8b3dc38ecc4eb ae97ddd87f3d8985')).

    "

     self run:#test08_sha384

     self new test08_sha384

    "

    "Modified (format): / 22-03-2019 / 12:33:59 / Claus Gittinger"

!

test09_sha512

    |h|

    "/ test vectors from https://www.di-mgt.com.au/sha_testvectors.html

    "/ and others

    self

        skipIf:(SHA512Stream isBehavior not or:[SHA512Stream isLoaded not])

        description:'SHA512Stream/libcrypt is not loaded'.

    h := SHA512Stream hashValueOf:''.

    self assert:(h = (ByteArray fromHexString:'cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e')).

    h := SHA512Stream hashValueOf:'The quick brown fox jumps over the lazy dog'.

    self assert:(h = (ByteArray fromHexString:'07e547d9586f6a73f73fbac0435ed76951218fb7d0c8d788a309d785436bbb642e93a252a954f23912547d1e8a3b5ed6e1bfd7097821233fa0538f3db854fee6')).

    h := SHA512Stream hashValueOf:'abc'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'ddaf35a193617aba cc417349ae204131 12e6fa4e89a97ea2 0a9eeee64b55d39a 2192992a274fc1a8 36ba3c23a3feebbd 454d4423643ce80e 2a9ac94fa54ca49f')).

    h := SHA512Stream hashValueOf:'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'204a8fc6dda82f0a 0ced7beb8e08a416 57c16ef468b228a8 279be331a703c335 96fd15c13b1b07f9 aa1d3bea57789ca0 31ad85c7a71dd703 54ec631238ca3445')).

    h := SHA512Stream hashValueOf:'abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu'.

    self assert:(h = (ByteArray fromHexStringWithSeparators:'8e959b75dae313da 8cf4f72814fc143f 8f7779c6eb9f7fa1 7299aeadb6889018 501d289e4900f7e4 331b99dec4b5433a c7d329eeb6dd2654 5e96e55b874be909')).

    h := SHA512Stream hashValueOf:(String new:1000000 withAll:$a).

    self assert:(h = (ByteArray fromHexStringWithSeparators:'e718483d0ce76964 4e2e42c7bc15b463 8e1f98b13b204428 5632a803afa973eb de0ff244877ea60a 4cb0432ce577c31b eb009c5c2c49aa2e 4eadb217ad8cc09b')).

    "

     self run:#test09_sha512

     self new test09_sha512

    "

    "Modified: / 22-03-2019 / 12:36:56 / Claus Gittinger"

!

test10_des

    |des crypt s s2|

    des := DesCipher new key:#[12 34 56 78 90 12 34 56].

    crypt := des encrypt:'12345678'.

    self assert:(crypt = #[85 205 168 117 136 155 222 239]).

    "/ ------------------------------------------------

    des := DesCipher new key:#[12 34 56 78 90 12 34 56].

    s := '12345678'.

    10 timesRepeat:[

	s2 := ByteArray new:s size.

	des cryptBlock:s from:1 "to:nil" into:s2 startingAt:1 encrypt:true.

	s := s2.

    ].

    self assert:(s = #[212 114 83 160 109 1 37 83]).

    "/ ------------------------------------------------

    des := DesCipher new key:#[16rFF 16r80 56 78 90 12 34 56].

    crypt := des encrypt:'12345678'.

    self assert:(crypt = #[54 60 159 218 32 8 70 60]).

    "

     self run:#test10_des

     self new test10_des

    "

    "Modified: / 25-11-2013 / 11:45:34 / cg"

!

test11_rsaKey

    |dir fn key ks plain cipher|

    dir := Smalltalk packageDirectoryForPackageId:'exept:expecco'.

    self skipIf:dir isNil description:'directory with test key is not present'.

    fn := dir asFilename construct:'license/expeccoKey.pem'.

    self skipIf:fn exists not description:'test key is not present'.

    key := RSASecretCryptKey fromPemStream:fn readStream.

    ks := RSACryptStream new.

    ks encryptWithSecretKey:true.

    ks key:key.

    ks stream:#[] writeStream.

    plain := '12345678901234567890'.

    ks encrypt:plain.

    cipher := ks stream contents.

    ks := RSACryptStream new.

    ks encryptWithSecretKey:true.

    ks key:key.

    ks stream:#[] writeStream.

    ks decrypt:cipher.

    self assert:(ks stream contents asString = plain).

    "/ -------------------------------------------

    ks := RSACryptStream new.

    ks encryptWithSecretKey:true.

    ks key:key.

    ks stream:#[] writeStream.

    plain := #[16rFF 16r80 16r00].

    ks encrypt:plain.

    cipher := ks stream contents.

    ks := RSACryptStream new.

    ks encryptWithSecretKey:true.

    ks key:key.

    ks stream:#[] writeStream.

    ks decrypt:cipher.

    self assert:(ks stream contents = plain).

    "