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Allow for custom encoding nonce #53

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merged 1 commit into from
Aug 31, 2024
Merged

Allow for custom encoding nonce #53

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8 changes: 6 additions & 2 deletions dare.go
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Original file line number Diff line number Diff line change
Expand Up @@ -90,7 +90,9 @@ func newAuthEncV10(cfg *Config) (authEncV10, error) {
return authEncV10{}, err
}
var randVal [8]byte
if _, err = io.ReadFull(cfg.Rand, randVal[:]); err != nil {
if cfg.Nonce != nil {
copy(randVal[:], cfg.Nonce[:8])
} else if _, err = io.ReadFull(cfg.Rand, randVal[:]); err != nil {
return authEncV10{}, err
}
return authEncV10{
Expand Down Expand Up @@ -167,7 +169,9 @@ func newAuthEncV20(cfg *Config) (authEncV20, error) {
return authEncV20{}, err
}
var randVal [12]byte
if _, err = io.ReadFull(cfg.Rand, randVal[:]); err != nil {
if cfg.Nonce != nil {
randVal = *cfg.Nonce
} else if _, err = io.ReadFull(cfg.Rand, randVal[:]); err != nil {
return authEncV20{}, err
}
return authEncV20{
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4 changes: 4 additions & 0 deletions sio.go
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Expand Up @@ -122,6 +122,10 @@ type Config struct {
// the default value (crypto/rand.Reader) is used.
Rand io.Reader

// Nonce will override the nonce if set non-nil.
// V2 will use all 12 bytes, V1 first 8 bytes.
Nonce *[12]byte

// The size of the encrypted payload in bytes. The
// default value is 64KB. It should be used to restrict
// the size of encrypted packages. The payload size
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