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authorHans Nilsson <[email protected]>2019-05-02 15:10:08 +0200
committerHans Nilsson <[email protected]>2019-05-03 11:56:09 +0200
commitdf5be903dfc32e887317a677fa1e0c9eda3ebcaa (patch)
treeeb954b2347407061a487d35da4adde5ad05021bf
parent8d107e535226e2ce6af97a10a9c71352da47e307 (diff)
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crypto: Doc link fixes
-rw-r--r--lib/crypto/doc/src/crypto.xml16
-rw-r--r--lib/crypto/doc/src/new_api.xml81
2 files changed, 68 insertions, 29 deletions
diff --git a/lib/crypto/doc/src/crypto.xml b/lib/crypto/doc/src/crypto.xml
index 751cf9d1fc..d1d1252f29 100644
--- a/lib/crypto/doc/src/crypto.xml
+++ b/lib/crypto/doc/src/crypto.xml
@@ -678,7 +678,8 @@
</p>
<p>For encryption, set the <c>EncryptFlag</c> to <c>true</c>. For decryption, set it to <c>false</c>.
</p>
- <p>See <seealso marker="crypto:new_api#the-new-api">examples in the User's Guide.</seealso>
+ <p>See <seealso marker="crypto:new_api#examples-of-crypto_init-4-and-crypto_update-2">
+ examples in the User's Guide.</seealso>
</p>
</desc>
</func>
@@ -696,7 +697,8 @@
or
<seealso marker="crypto#crypto_init/4">crypto_init/4</seealso>.
</p>
- <p>See <seealso marker="crypto:new_api#the-new-api">examples in the User's Guide.</seealso>
+ <p>See <seealso marker="crypto:new_api#examples-of-crypto_init-4-and-crypto_update-2">
+ examples in the User's Guide.</seealso>
</p>
</desc>
</func>
@@ -712,8 +714,6 @@
</p>
<p>For encryption, set the <c>EncryptFlag</c> to <c>true</c>. For decryption, set it to <c>false</c>.
</p>
- <p>See <seealso marker="crypto:new_api#the-new-api">examples in the User's Guide.</seealso>
- </p>
</desc>
</func>
@@ -726,8 +726,6 @@
The <c>State</c> should be created with
<seealso marker="crypto#crypto_dyn_iv_init/3">crypto_dyn_iv_init/3</seealso>.
</p>
- <p>See <seealso marker="crypto:new_api#the-new-api">examples in the User's Guide.</seealso>
- </p>
</desc>
</func>
@@ -744,11 +742,11 @@
<fsummary>Do a complete encrypt or decrypt of the full text</fsummary>
<desc>
<p>Part of the <seealso marker="crypto:new_api#the-new-api">new API</seealso>.
- Do a complete encrypt or decrypt of the full text.
+ Do a complete encrypt or decrypt of the full text in the argument <c>Data</c>.
</p>
<p>For encryption, set the <c>EncryptFlag</c> to <c>true</c>. For decryption, set it to <c>false</c>.
</p>
- <p>See <seealso marker="crypto:new_api#the-new-api">examples in the User's Guide.</seealso>
+ <p>See <seealso marker="crypto:new_api#example-of-crypto_one_time-5">examples in the User's Guide.</seealso>
</p>
</desc>
</func>
@@ -768,7 +766,7 @@
<p>For decryption, set the <c>EncryptFlag</c> to <c>false</c> and put the tag to be checked
in the argument <c>TagOrTagLength</c>.
</p>
- <p>See <seealso marker="crypto:new_api#the-new-api">examples in the User's Guide.</seealso>
+ <p>See <seealso marker="crypto:new_api#example-of-crypto_one_time_aead-6">examples in the User's Guide.</seealso>
</p>
</desc>
</func>
diff --git a/lib/crypto/doc/src/new_api.xml b/lib/crypto/doc/src/new_api.xml
index 58ace97554..bd2334ac9f 100644
--- a/lib/crypto/doc/src/new_api.xml
+++ b/lib/crypto/doc/src/new_api.xml
@@ -59,9 +59,9 @@
<item><seealso marker="crypto#stream_init-2">stream_init/3</seealso></item>
<item><seealso marker="crypto#stream_encrypt-2">stream_encrypt/2</seealso></item>
<item><seealso marker="crypto#stream_decrypt-2">stream_decrypt/2</seealso></item>
- <item><seealso marker="crypto#supports-0">suppports/0</seealso></item>
+ <item><seealso marker="crypto#supports-0">supports/0</seealso></item>
</list>
- <p>They are not deprecated for now, but may be in a future.
+ <p>They are not deprecated for now, but may be in a future release.
</p>
</section>
@@ -76,7 +76,8 @@
<item><seealso marker="crypto#crypto_one_time_aead/7">crypto_one_time_aead/7</seealso></item>
</list>
<p>In those functions the internal crypto state is first created and initialized
- with the cipher type, the key and possibly other data. Then the data is encrypted or decrypted,
+ with the cipher type, the key and possibly other data. Then the single binary is encrypted
+ or decrypted,
the crypto state is de-allocated and the result of the crypto operation is returned.
</p>
<p>The <c>crypto_one_time_aead</c> functions are for the ciphers of mode <c>ccm</c> or
@@ -114,29 +115,39 @@
<section>
<title>Examples of crypto_init/4 and crypto_update/2</title>
- <p>Encrypting two blocks:</p>
+ <p>The functions <seealso marker="crypto#crypto_init/4">crypto_init/4</seealso>
+ and <seealso marker="crypto#crypto_update/2">crypto_update/2</seealso> are intended
+ to be used for encrypting or decrypting a sequence of blocks. First one call of
+ <c>crypto_init/4</c> initialises the crypto context. One or more calls <c>crypto_update/2</c>
+ does the actual encryption or decryption for each block.
+ </p>
+ <p>This example shows first the encryption of two blocks and then decryptions of the cipher
+ text, but divided into three blocks just to show that it is possible to divide the plain text and
+ cipher text differently for some ciphers:</p>
<code type="erl">
1> crypto:start().
ok
2> Key = &lt;&lt;1:128>>.
- 2> IV = &lt;&lt;0:128>>.
- 2> StateEnc = crypto:crypto_init(aes_128_ctr, Key, IV, true). % encrypt -> true
+ &lt;&lt;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>>
+ 3> IV = &lt;&lt;0:128>>.
+ &lt;&lt;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>>
+ 4> StateEnc = crypto:crypto_init(aes_128_ctr, Key, IV, true). % encrypt -> true
#Ref&lt;0.3768901617.1128660993.124047>
- 3> crypto:crypto_update(StateEnc, &lt;&lt;"First bytes">>).
+ 5> crypto:crypto_update(StateEnc, &lt;&lt;"First bytes">>).
&lt;&lt;67,44,216,166,25,130,203,5,66,6,162>>
- 4> crypto:crypto_update(StateEnc, &lt;&lt;"Second bytes">>).
+ 6> crypto:crypto_update(StateEnc, &lt;&lt;"Second bytes">>).
&lt;&lt;16,79,94,115,234,197,94,253,16,144,151,41>>
- 5>
- 5> StateDec = crypto:crypto_init(aes_128_ctr, Key, IV, false). % decrypt -> false
+ 7>
+ 7> StateDec = crypto:crypto_init(aes_128_ctr, Key, IV, false). % decrypt -> false
#Ref&lt;0.3768901617.1128660994.124255>
- 6> crypto:crypto_update(StateDec, &lt;&lt;67,44,216,166,25,130,203>>).
+ 8> crypto:crypto_update(StateDec, &lt;&lt;67,44,216,166,25,130,203>>).
&lt;&lt;"First b">>
- 7> crypto:crypto_update(StateDec, &lt;&lt;5,66,6,162,16,79,94,115,234,197,
- 94,253,16,144,151>>).
+ 9> crypto:crypto_update(StateDec, &lt;&lt;5,66,6,162,16,79,94,115,234,197,
+ 94,253,16,144,151>>).
&lt;&lt;"ytesSecond byte">>
- 8> crypto:crypto_update(StateDec, &lt;&lt;41>>).
+ 10> crypto:crypto_update(StateDec, &lt;&lt;41>>).
&lt;&lt;"s">>
- 9>
+ 11>
</code>
<p>Note that the internal data that the <c>StateEnc</c> and <c>StateDec</c> references are
destructivly updated by the calls to <seealso marker="crypto#crypto_update/2">crypto_update/2</seealso>.
@@ -163,21 +174,51 @@
<title>Example of crypto_one_time/5</title>
<p>The same example as in the
<seealso marker="#examples-of-crypto_init-4-and-crypto_update-2">previous section</seealso>,
- but now with one call to <c>crypto_one_time/5</c>:
+ but now with one call to <seealso marker="crypto#crypto_one_time/5">crypto_one_time/5</seealso>:
</p>
<code>
- 2> Key = &lt;&lt;1:128>>.
+ 1> Key = &lt;&lt;1:128>>.
+ &lt;&lt;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>>
2> IV = &lt;&lt;0:128>>.
- 2> Txt = [&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>],
- 2> crypto:crypto_one_time(aes_128_ctr, Key, IV, Txt, true).
+ &lt;&lt;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>>
+ 3> Txt = [&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>].
+ [&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>]
+ 4> crypto:crypto_one_time(aes_128_ctr, Key, IV, Txt, true).
&lt;&lt;67,44,216,166,25,130,203,5,66,6,162,16,79,94,115,234,
197,94,253,16,144,151,41>>
- 3>
+ 5>
</code>
<p>The <c>[&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>]</c> could of course have been one
single binary: <c>&lt;&lt;"First bytesSecond bytes">></c>.
</p>
</section>
+
+ <section>
+ <title>Example of crypto_one_time_aead/6</title>
+ <p>The same example as in the
+ <seealso marker="#example-of-crypto_one_time-5">previous section</seealso>,
+ but now with one call to <seealso marker="crypto#crypto_one_time_aead/6">crypto_one_time_aead/6</seealso>:
+ </p>
+ <code>
+ 1> Key = &lt;&lt;1:128>>.
+ &lt;&lt;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>>
+ 2> IV = &lt;&lt;0:128>>.
+ &lt;&lt;0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>>
+ 3> Txt = [&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>].
+ [&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>]
+ 4> AAD = &lt;&lt;"Some bytes">>.
+ &lt;&lt;"Some bytes">>
+ 5> crypto:crypto_one_time_aead(aes_128_gcm, Key, IV, Txt, AAD, true).
+ {&lt;&lt;240,130,38,96,130,241,189,52,3,190,179,213,132,1,72,
+ 192,103,176,90,104,15,71,158>>,
+ &lt;&lt;131,47,45,91,142,85,9,244,21,141,214,71,31,135,2,155>>}
+ 9>
+ </code>
+ <p>The <c>[&lt;&lt;"First bytes">>,&lt;&lt;"Second bytes">>]</c> could of course have been one
+ single binary: <c>&lt;&lt;"First bytesSecond bytes">></c>.
+ </p>
+ </section>
+
</section>
<section>