3c8e80a1a4
- Remove no longer needed exclude rules - Add new exclude rules for printf govet errors - Remove deprecated linters `execinquery` and `exportloopref` - Rename linter `goerr113` to `err113` - Rename linter `gomnd` to `mnd`
67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
package cli
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import (
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"crypto/rand"
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"flag"
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"fmt"
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)
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func (c *CLI) GenKey(args []string) (err error) {
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flagSet := flag.NewFlagSet("genkey", flag.ExitOnError)
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err = flagSet.Parse(args)
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if err != nil {
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return fmt.Errorf("parsing flags: %w", err)
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}
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const keyLength = 128 / 8
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keyBytes := make([]byte, keyLength)
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_, _ = rand.Read(keyBytes)
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key := base58Encode(keyBytes)
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fmt.Println(key)
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return nil
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}
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func base58Encode(data []byte) string {
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const alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
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const radix = 58
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zcount := 0
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for zcount < len(data) && data[zcount] == 0 {
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zcount++
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}
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// integer simplification of ceil(log(256)/log(58))
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ceilLog256Div58 := (len(data)-zcount)*555/406 + 1 //nolint:mnd
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size := zcount + ceilLog256Div58
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output := make([]byte, size)
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high := size - 1
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for _, b := range data {
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i := size - 1
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for carry := uint32(b); i > high || carry != 0; i-- {
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carry += 256 * uint32(output[i]) //nolint:mnd
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output[i] = byte(carry % radix)
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carry /= radix
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}
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high = i
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}
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// Determine the additional "zero-gap" in the output buffer
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additionalZeroGapEnd := zcount
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for additionalZeroGapEnd < size && output[additionalZeroGapEnd] == 0 {
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additionalZeroGapEnd++
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}
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val := output[additionalZeroGapEnd-zcount:]
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size = len(val)
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for i := range val {
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output[i] = alphabet[val[i]]
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}
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return string(output[:size])
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}
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