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authorRickard Green <[email protected]>2019-04-24 14:29:10 +0200
committerRickard Green <[email protected]>2019-04-24 14:29:10 +0200
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Revert "Prepare release"
This reverts commit 425889ba69b69a9b6fb14bfbef121d51b78e853a.
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</header>
<p>This document describes the changes made to the Crypto application.</p>
-<section><title>Crypto 4.5</title>
-
- <section><title>Fixed Bugs and Malfunctions</title>
- <list>
- <item>
- <p>
- Fixed a bug in error return for <c>crypto:poly1305/2</c>.
- It returned the atom <c>notsup</c> instead of the
- exception <c>notsup</c>.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-15677</p>
- </item>
- <item>
- <p>
- The cipher chacha20 was introduced in OpenSSL 1.1.0.
- However, it could in a very odd situation, fail for
- versions less than OpenSSL 1.1.0d. It is therefore
- disabled for those versions.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-15678</p>
- </item>
- </list>
- </section>
-
-
- <section><title>Improvements and New Features</title>
- <list>
- <item>
- <p> A new <c>rand</c> module algorithm, <c>exro928ss</c>
- (Xoroshiro928**), has been implemented. It has got a
- really long period and good statistical quality for all
- output bits, while still being only about 50% slower than
- the default algorithm. </p><p> The same generator is also
- used as a long period counter in a new <c>crypto</c>
- plugin for the <c>rand</c> module, algorithm
- <c>crypto_aes</c>. This plugin uses AES-256 to scramble
- the counter which buries any detectable statistical
- artifacts. Scrambling is done in chunks which are cached
- to get good amortized speed (about half of the default
- algorithm). </p>
- <p>
- Own Id: OTP-14461 Aux Id: PR-1857 </p>
- </item>
- <item>
- <p>
- Crypto's single C-file is splitted into multiple files.
- The different coding styles in the different parts are
- unified into a single style.</p>
- <p>
- Own Id: OTP-14732 Aux Id: PR-2068, PR-2095 </p>
- </item>
- <item>
- <p>
- Build configuration of the <c>crypto</c> application has
- been moved from the <c>erts</c> application into the
- <c>crypto</c> application.</p>
- <p>
- Own Id: OTP-15129</p>
- </item>
- <item>
- <p>
- Adds two hash functions <c>blake2b</c> and <c>blake2s</c>
- (64 bit hash and 32 bit hash respectively). These are
- modern and standard hash functions used in blockchains
- and encrypted communication protocols. The hash functions
- are available in OpenSSL since version 1.1.1.</p>
- <p>
- Own Id: OTP-15564 Aux Id: PR-2129 </p>
- </item>
- <item>
- <p>
- A new API is implemented in crypto. See the CRYPTO user's
- guide, chapter <i>New and Old API</i> for more
- information.</p>
- <p>
- The old api with the <c>crypto:block_*</c> and
- <c>crypto:stream_*</c> interfaces is kept for
- compatibility, but implemented with the new api. Please
- note that since the error checking is more thorough,
- there <i>might</i> be arguments with for example faulty
- lengths that are no longer accepted.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-15644 Aux Id: OTP-14732 , OTP-15451, PR-1857
- , PR-2068, PR-2095 </p>
- </item>
- <item>
- <p>
- The new hash_info/1 and cipher_info/1 functions returns
- maps with information about the hash or cipher in the
- argument.</p>
- <p>
- Own Id: OTP-15655 Aux Id: PR-2173, ERL-864, PR-2186 </p>
- </item>
- <item>
- <p>
- Obey additional OpenSSL configure flags when compiling
- the C-part of the CRYPTO application: <c>no-bf</c>,
- <c>no-blake2</c>, <c>no-chacha</c>, <c>no-cmac</c>,
- <c>no-dh</c>, <c>no-dsa</c>, <c>no-md4</c>,
- <c>no-poly1305</c>, <c>no-rc2</c>, <c>no-rc4</c> and
- <c>no-rmd160</c>.</p>
- <p>
- Own Id: OTP-15683</p>
- </item>
- <item>
- <p>
- A new function <c>crypto:supports/1</c> is introduced.
- The single argument takes an atom as argument:
- <c>hashs</c>, <c>public_keys</c>, <c>ciphers</c>,
- <c>macs</c>, <c>curves</c> or <c>rsa_opts</c>. The return
- value is a list of supported algorithms.</p>
- <p>
- The difference with the existing <c>crypto:supports/0</c>
- is, apart from the argument and the return value, that
- the old function reports what is supported by the old
- api, and the new function reports algorithms in the new
- api.</p>
- <p>
- Own Id: OTP-15771</p>
- </item>
- </list>
- </section>
-
-</section>
-
<section><title>Crypto 4.4.2</title>
<section><title>Fixed Bugs and Malfunctions</title>