1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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
|
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>2014</year><year>2017</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
The contents of this file are subject to the Erlang Public License,
Version 1.1, (the "License"); you may not use this file except in
compliance with the License. You should have received a copy of the
Erlang Public License along with this software. If not, it can be
retrieved online at http://www.erlang.org/.
Software distributed under the License is distributed on an "AS IS"
basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
the License for the specific language governing rights and limitations
under the License.
</legalnotice>
<title>Algorithm Details</title>
<prepared>Hans Nilsson</prepared>
<docno></docno>
<date>2018-08-22</date>
<rev>A</rev>
<file>algorithm_details.xml</file>
</header>
<p>
This chapter describes details of algorithms in the crypto application.
</p>
<p>The tables only documents the supported cryptos and key lengths. The user should not draw any conclusion
on security from the supplied tables.
</p>
<section>
<title>Ciphers</title>
<section>
<title>Block Ciphers</title>
<p>To be used in
<seealso marker="crypto#block_encrypt-3">block_encrypt/3</seealso>,
<seealso marker="crypto#block_encrypt-4">block_encrypt/4</seealso>,
<seealso marker="crypto#block_decrypt-3">block_decrypt/3</seealso> and
<seealso marker="crypto#block_decrypt-4">block_decrypt/4</seealso>.
</p>
<p>Available in all OpenSSL compatible with Erlang CRYPTO if not disabled by configuration.
</p>
<p>To dynamically check availability, check that the name in the <i>Cipher and Mode</i> column is present in the
list with the <c>cipher</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
<table>
<row><cell><strong>Cipher and Mode</strong></cell><cell><strong>Key length</strong><br/><strong>[bytes]</strong></cell><cell><strong>IV length</strong><br/><strong>[bytes]</strong></cell><cell><strong>Block size</strong><br/><strong>[bytes]</strong></cell></row>
<row><cell><c>aes_cbc</c></cell> <cell>16, 24, 32</cell><cell>16</cell><cell>16</cell></row>
<row><cell><c>aes_cbc128</c></cell><cell>16</cell><cell>16</cell><cell>16</cell></row>
<row><cell><c>aes_cbc256</c></cell><cell>32</cell><cell>16</cell><cell>16</cell></row>
<row><cell><c>aes_cfb8</c></cell> <cell>16, 24, 32</cell><cell>16</cell><cell>any</cell></row>
<row><cell><c>aes_ecb</c></cell><cell>16, 24, 32</cell><cell> </cell><cell>16</cell></row>
<row><cell><c>aes_ige256</c></cell><cell>16</cell><cell>32</cell><cell>16</cell></row>
<row><cell><c>blowfish_cbc</c></cell> <cell>4-56</cell> <cell>8</cell> <cell>8</cell></row>
<row><cell><c>blowfish_cfb64</c></cell> <cell>1-</cell> <cell>8</cell> <cell>any</cell></row>
<row><cell><c>blowfish_ecb</c></cell><cell>1-</cell><cell> </cell><cell>8</cell></row>
<row><cell><c>blowfish_ofb64</c></cell><cell>1-</cell><cell>8</cell><cell>any</cell></row>
<row><cell><c>des3_cbc</c><br/><i>(=DES EDE3 CBC)</i></cell><cell>[8,8,8]</cell><cell>8</cell><cell>8</cell></row>
<row><cell><c>des3_cfb</c><br/><i>(=DES EDE3 CFB)</i></cell><cell>[8,8,8]</cell><cell>8</cell><cell>any</cell></row>
<row><cell><c>des_cbc</c></cell><cell>8</cell><cell>8</cell> <cell>8</cell></row>
<row><cell><c>des_cfb</c></cell><cell>8</cell><cell>8</cell><cell>any</cell></row>
<row><cell><c>des_ecb</c></cell><cell>8</cell><cell> </cell><cell>8</cell></row>
<row><cell><c>des_ede3</c><br/><i>(=DES EDE3 CBC)</i></cell><cell>[8,8,8]</cell><cell>8</cell><cell>8</cell></row>
<row><cell><c>rc2_cbc</c></cell><cell>1-</cell><cell>8</cell><cell>8</cell></row>
<tcaption>Block cipher key lengths</tcaption>
</table>
</section>
<section>
<title>AEAD Ciphers</title>
<p>To be used in <seealso marker="crypto#block_encrypt-4">block_encrypt/4</seealso> and
<seealso marker="crypto#block_decrypt-4">block_decrypt/4</seealso>.
</p>
<p>To dynamically check availability, check that the name in the <i>Cipher and Mode</i> column is present in the
list with the <c>cipher</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
<table>
<row><cell><strong>Cipher and Mode</strong></cell><cell><strong>Key length</strong><br/><strong>[bytes]</strong></cell><cell><strong>IV length</strong><br/><strong>[bytes]</strong></cell><cell><strong>AAD length</strong><br/><strong>[bytes]</strong></cell><cell><strong>Tag length</strong><br/><strong>[bytes]</strong></cell><cell><strong>Block size</strong><br/><strong>[bytes]</strong></cell><cell><strong>Supported with</strong><br/><strong>OpenSSL versions</strong></cell></row>
<row><cell><c>aes_ccm</c></cell> <cell>16,24,32</cell> <cell>7-13</cell> <cell>any</cell> <cell>even 4-16<br/>default: 12</cell> <cell>any</cell><cell>1.1.0 -</cell></row>
<row><cell><c>aes_gcm</c></cell> <cell>16,24,32</cell> <cell>1-</cell> <cell>any</cell> <cell>1-16<br/>default: 16</cell> <cell>any</cell><cell>1.1.0 -</cell></row>
<row><cell><c>chacha20_poly1305</c></cell><cell>32</cell> <cell>1-16</cell> <cell>any</cell> <cell>16</cell> <cell>any</cell><cell>1.1.0 -</cell></row>
<tcaption>AEAD cipher key lengths</tcaption>
</table>
</section>
<section>
<title>Stream Ciphers</title>
<p>To be used in <seealso marker="crypto#stream_init-2">stream_init/2</seealso> and
<seealso marker="crypto#stream_init/3">stream_init/3</seealso>.
</p>
<p>To dynamically check availability, check that the name in the <i>Cipher and Mode</i> column is present in the
list with the <c>cipher</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
<table>
<row><cell><strong>Cipher and Mode</strong></cell><cell><strong>Key length</strong><br/><strong>[bytes]</strong></cell><cell><strong>IV length</strong><br/><strong>[bytes]</strong></cell><cell><strong>Supported with</strong><br/><strong>OpenSSL versions</strong></cell></row>
<row><cell><c>aes_ctr</c></cell><cell>16, 24, 32</cell><cell>16</cell><cell>1.0.1 -</cell></row>
<row><cell><c>rc4</c></cell><cell>1-</cell><cell> </cell> <cell>all</cell></row>
<tcaption>Stream cipher key lengths</tcaption>
</table>
</section>
</section>
<section>
<title>Message Authentication Codes (MACs)</title>
<section>
<title>CMAC</title>
<p>To be used in <seealso marker="crypto#cmac-3">cmac/3</seealso> and
<seealso marker="crypto#cmac-3">cmac/4</seealso>.
</p>
<p>CMAC with the following ciphers are available with OpenSSL 1.0.1 or later if not disabled by configuration.
</p>
<p>To dynamically check availability, check that the name <c>cmac</c> is present in the
list with the <c>macs</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
Also check that the name in the <i>Cipher and Mode</i> column is present in the
list with the <c>cipher</c> tag in the return value.
</p>
<table>
<row><cell><strong>Cipher and Mode</strong></cell><cell><strong>Key length</strong><br/><strong>[bytes]</strong></cell><cell><strong>Max Mac Length</strong><br/><strong>[bytes]</strong></cell></row>
<row><cell><c>aes_cbc</c></cell> <cell>16, 24, 32</cell><cell>16</cell></row>
<row><cell><c>aes_cbc128</c></cell><cell>16</cell><cell>16</cell></row>
<row><cell><c>aes_cbc256</c></cell><cell>32</cell><cell>16</cell></row>
<row><cell><c>aes_cfb8</c></cell> <cell>16</cell><cell>1</cell></row>
<row><cell><c>blowfish_cbc</c></cell> <cell>4-56</cell> <cell>8</cell></row>
<row><cell><c>blowfish_cfb64</c></cell> <cell>1-</cell> <cell>1</cell></row>
<row><cell><c>blowfish_ecb</c></cell><cell>1-</cell> <cell>8</cell></row>
<row><cell><c>blowfish_ofb64</c></cell><cell>1-</cell> <cell>1</cell></row>
<row><cell><c>des3_cbc</c><br/><i>(=DES EDE3 CBC)</i></cell><cell>[8,8,8]</cell><cell>8</cell></row>
<row><cell><c>des3_cfb</c><br/><i>(=DES EDE3 CFB)</i></cell><cell>[8,8,8]</cell><cell>1</cell></row>
<row><cell><c>des_cbc</c></cell><cell>8</cell><cell>8</cell></row>
<row><cell><c>des_cfb</c></cell><cell>8</cell><cell>1</cell></row>
<row><cell><c>des_ecb</c></cell><cell>8</cell><cell>1</cell></row>
<row><cell><c>rc2_cbc</c></cell><cell>1-</cell><cell>8</cell></row>
<tcaption>CMAC cipher key lengths</tcaption>
</table>
</section>
<section>
<title>HMAC</title>
<p>Available in all OpenSSL compatible with Erlang CRYPTO if not disabled by configuration.
</p>
<p>To dynamically check availability, check that the name <c>hmac</c> is present in the
list with the <c>macs</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
</section>
<section>
<title>POLY1305</title>
<p>POLY1305 is available with OpenSSL 1.1.1 or later if not disabled by configuration.
</p>
<p>To dynamically check availability, check that the name <c>poly1305</c> is present in the
list with the <c>macs</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
</section>
</section>
<section>
<title>Hash</title>
<p>To dynamically check availability, check that the wanted name in the <i>Names</i> column is present in the
list with the <c>hashs</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
<table>
<row><cell><strong>Type</strong></cell>
<cell><strong>Names</strong></cell>
<cell><strong>Supported with</strong><br/><strong>OpenSSL versions</strong></cell>
</row>
<row><cell>SHA1</cell><cell>sha</cell><cell>all</cell></row>
<row><cell>SHA2</cell><cell>sha224, sha256, sha384, sha512</cell><cell>all</cell></row>
<row><cell>SHA3</cell><cell>sha3_224, sha3_256, sha3_384, sha3_512</cell><cell>1.1.1 -</cell></row>
<row><cell>MD4</cell><cell>md4</cell><cell>all</cell></row>
<row><cell>MD5</cell><cell>md5</cell><cell>all</cell></row>
<row><cell>RIPEMD</cell><cell>ripemd160</cell><cell>all</cell></row>
<tcaption></tcaption>
</table>
</section>
<section>
<title>Public Key Cryptography</title>
<section>
<title>RSA</title>
<p>RSA is available with all OpenSSL versions compatible with Erlang CRYPTO if not disabled by configuration.
To dynamically check availability, check that the atom <c>rsa</c> is present in the
list with the <c>public_keys</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
<table>
<row><cell><strong>Option</strong></cell> <cell><strong>sign/verify</strong></cell> <cell><strong>encrypt/decrypt</strong></cell> <cell><strong>Supported with</strong><br/><strong>OpenSSL versions</strong></cell> </row>
<row><cell>{rsa_mgf1_md,atom()}</cell> <cell>x</cell> <cell>x</cell> <cell>1.0.1</cell></row>
<row><cell>{rsa_oaep_label, binary()}</cell> <cell> </cell> <cell>x</cell> <cell></cell></row>
<row><cell>{rsa_oaep_md, atom()}</cell> <cell> </cell> <cell>x</cell> <cell></cell></row>
<row><cell>{rsa_padding,rsa_pkcs1_pss_padding}</cell> <cell>x</cell> <cell> </cell> <cell>1.0.0</cell></row>
<row><cell>{rsa_pss_saltlen, -2..}</cell> <cell>x</cell> <cell> </cell> <cell>1.0.0</cell></row>
<row><cell>{rsa_padding,rsa_no_padding}</cell> <cell>x</cell> <cell>x</cell> <cell></cell></row>
<row><cell>{rsa_padding,rsa_pkcs1_padding}</cell> <cell>x</cell> <cell>x</cell> <cell></cell></row>
<row><cell>{rsa_padding,rsa_sslv23_padding}</cell> <cell> </cell> <cell>x</cell> <cell></cell></row>
<row><cell>{rsa_padding,rsa_x931_padding}</cell> <cell>x</cell> <cell> </cell> <cell></cell></row>
<tcaption></tcaption>
</table>
</section>
<section>
<title>DSS</title>
<p>DSS is available with OpenSSL versions compatible with Erlang CRYPTO if not disabled by configuration.
To dynamically check availability, check that the atom <c>dss</c> is present in the
list with the <c>public_keys</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
</section>
<section>
<title>ECDSA</title>
<p>ECDSA is available with OpenSSL 0.9.8o or later if not disabled by configuration.
To dynamically check availability, check that the atom <c>ecdsa</c> is present in the
list with the <c>public_keys</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
If the atom <c>ec_gf2m</c> characteristic two field curves are available.
</p>
<p>The actual supported named curves could be checked by examining the list with the
<c>curves</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
</section>
<section>
<title>Diffie-Hellman</title>
<p>Diffie-Hellman computations are available with OpenSSL versions compatible with Erlang CRYPTO
if not disabled by configuration.
To dynamically check availability, check that the atom <c>dh</c> is present in the
list with the <c>public_keys</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
</section>
<section>
<title>Elliptic Curve Diffie-Hellman</title>
<p>Elliptic Curve Diffie-Hellman is available with OpenSSL 0.9.8o or later if not disabled by configuration.
To dynamically check availability, check that the atom <c>ecdh</c> is present in the
list with the <c>public_keys</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
<p>The Edward curves <c>x25519</c> and <c>x448</c> are supported with OpenSSL 1.1.1 or later
if not disabled by configuration.
</p>
<p>The actual supported named curves could be checked by examining the list with the
<c>curves</c> tag in the return value of
<seealso marker="crypto#supports-0">crypto:supports()</seealso>.
</p>
</section>
</section>
</chapter>
|
