Odd hash.Sum call flow

Docs > Code Analysis > Static Analysis Rules > Odd hash.Sum call flow

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Metadata

ID: go-security/hashsum

Language: Go

Severity: Error

Category: Error Prone

Description

No description found

Non-Compliant Code Examples

import "crypto/sha256"

func main() {
    out := make([]byte, 64)
    h := sha256.New()
    hashed := h.Sum(out)

    hashed := sha256.New().Sum(out)
}

Compliant Code Examples

import "crypto/sha256"

func main() {
    arr := []int{1, 2, 3}
    out := make([]byte, 64)
    h := sha256.New()
    h.Write(arr)
    hashed := h.Sum(out)

    h2 := sha256.New()
    hashArr(h2, arr)
    hashed2 := h2.Sum(out)
}

func hashArr(h hash.Hash, b []byte) {
    h.Write(b)
}

How to use this rule

1
2
rulesets:
  - go-security     # Rules to enforce Go security.

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