# module blake2s


## Contents
- [Constants](#Constants)
- [new128](#new128)
- [new160](#new160)
- [new224](#new224)
- [new256](#new256)
- [new_digest](#new_digest)
- [new_pmac128](#new_pmac128)
- [new_pmac160](#new_pmac160)
- [new_pmac224](#new_pmac224)
- [new_pmac256](#new_pmac256)
- [pmac128](#pmac128)
- [pmac160](#pmac160)
- [pmac224](#pmac224)
- [pmac256](#pmac256)
- [sum128](#sum128)
- [sum160](#sum160)
- [sum224](#sum224)
- [sum256](#sum256)
- [Digest](#Digest)
  - [str](#str)
  - [write](#write)
  - [checksum](#checksum)

## Constants
```v
const size128 = 16
```

size128 is the size, in bytes, of a Blake2s 128 checksum.

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```v
const size160 = 20
```

size160 is the size, in bytes, of a Blake2s 160 checksum.

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```v
const size224 = 28
```

size224 is the size, in bytes, of a Blake2s 224 checksum.

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```v
const size256 = 32
```

size256 is the size, in bytes, of a Blake2s 256 checksum.

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```v
const block_size = 64
```

block_size is the block size, in bytes, of the Blake2s hash functions.

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## new128
```v
fn new128() !&Digest
```

new126 initializes the digest structure for a Blake2s 128 bit hash

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## new160
```v
fn new160() !&Digest
```

new160 initializes the digest structure for a Blake2s 160 bit hash

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## new224
```v
fn new224() !&Digest
```

new224 initializes the digest structure for a Blake2s 224 bit hash

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## new256
```v
fn new256() !&Digest
```

new256 initializes the digest structure for a Blake2s 256 bit hash

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## new_digest
```v
fn new_digest(hash_size u8, key []u8) !&Digest
```

new_digest creates an initialized digest structure based on the hash size and whether or not you specify a MAC key.

hash_size - the number of bytes in the generated hash. Legal values are between 1 and 32.

key - key used for generating a prefix MAC.  A zero length key is used for just generating a hash.  A key of 1 to 32 bytes can be used for generating a prefix MAC.

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## new_pmac128
```v
fn new_pmac128(key []u8) !&Digest
```

new_pmac128 initializes the digest structure for a Blake2s 128 bit prefix MAC

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## new_pmac160
```v
fn new_pmac160(key []u8) !&Digest
```

new_pmac160 initializes the digest structure for a Blake2s 160 bit prefix MAC

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## new_pmac224
```v
fn new_pmac224(key []u8) !&Digest
```

new_pmac224 initializes the digest structure for a Blake2s 224 bit prefix MAC

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## new_pmac256
```v
fn new_pmac256(key []u8) !&Digest
```

new_pmac256 initializes the digest structure for a Blake2s 256 bit prefix MAC

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## pmac128
```v
fn pmac128(data []u8, key []u8) []u8
```

pmac128 returns the Blake2s 128 bit prefix MAC of the data.

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## pmac160
```v
fn pmac160(data []u8, key []u8) []u8
```

pmac160 returns the Blake2s 160 bit prefix MAC of the data.

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## pmac224
```v
fn pmac224(data []u8, key []u8) []u8
```

pmac224 returns the Blake2s 224 bit prefix MAC of the data.

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## pmac256
```v
fn pmac256(data []u8, key []u8) []u8
```

pmac256 returns the Blake2s 256 bit prefix MAC of the data.

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## sum128
```v
fn sum128(data []u8) []u8
```

sum128 returns the Blake2s 128 bit checksum of the data.

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## sum160
```v
fn sum160(data []u8) []u8
```

sum160 returns the Blake2s 160 bit checksum of the data.

[[Return to contents]](#Contents)

## sum224
```v
fn sum224(data []u8) []u8
```

sum224 returns the Blake2s 224 bit checksum of the data.

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## sum256
```v
fn sum256(data []u8) []u8
```

sum256 returns the Blake2s 256 bit checksum of the data.

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## Digest
## str
```v
fn (d Digest) str() string
```

string makes a formatted string representation of a Digest structure

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## write
```v
fn (mut d Digest) write(data []u8) !
```

write adds bytes to the hash

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## checksum
```v
fn (mut d Digest) checksum() []u8
```

checksum finalizes the hash and returns the generated bytes.

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