From 1fa1ef2047d98b3329becfaebd9e132fbd5397f4 Mon Sep 17 00:00:00 2001 From: wepeng Date: Fri, 30 Aug 2019 15:27:59 +0800 Subject: [PATCH] modify BlakeGenerator chapter error (#117) --- doc/specs.md | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/doc/specs.md b/doc/specs.md index 2d7da8a..6952db0 100644 --- a/doc/specs.md +++ b/doc/specs.md @@ -29,7 +29,7 @@ RandomX is a proof of work (PoW) algorithm which was designed to close the gap b **AesHash1R** refers to an AES-based fingerprinting function described in chapter 3.4. It's capable of processing more than 10 bytes per clock cycle and produces a 512-bit output. -**BlakeGenerator** refers to a custom pseudo-random number generator described in chapter 3.4. It's based on the Blake2b hashing function. +**BlakeGenerator** refers to a custom pseudo-random number generator described in chapter 3.5. It's based on the Blake2b hashing function. **SuperscalarHash** refers to a custom diffusion function designed to run efficiently on superscalar CPUs (see chapter 7). It transforms a 64-byte input value into a 64-byte output value. @@ -269,15 +269,15 @@ finalState0 finalState1 finalState2 finalState3 The final state is the output of the function. -### 3.4 BlakeGenerator +### 3.5 BlakeGenerator BlakeGenerator is a simple pseudo-random number generator based on the Blake2b hashing function. It has a 64-byte internal state `S`. -#### 3.4.1 Initialization +#### 3.5.1 Initialization The internal state is initialized from a seed value `K` (0-60 bytes long). The seed value is written into the internal state and padded with zeroes. Then the internal state is initialized as `S = Hash512(S)`. -#### 3.4.2 Random number generation +#### 3.5.2 Random number generation The generator can generate 1 byte or 4 bytes at a time by supplying data from its internal state `S`. If there are not enough unused bytes left, the internal state is reinitialized as `S = Hash512(S)`. @@ -911,7 +911,7 @@ The finalizer and output calculation steps of Argon2 are omitted. The output is ### 7.2 SuperscalarHash initialization -The key value `K` is used to initialize a BlakeGenerator (see chapter 3.4), which is then used to generate 8 SuperscalarHash instances for Dataset initialization. +The key value `K` is used to initialize a BlakeGenerator (see chapter 3.5), which is then used to generate 8 SuperscalarHash instances for Dataset initialization. ### 7.3 Dataset block generation Dataset items are numbered sequentially with `itemNumber` starting from 0. Each 64-byte Dataset item is generated independently using 8 SuperscalarHash functions (generated according to chapter 7.2) and by XORing randomly selected data from the Cache (constructed according to chapter 7.1).