51 lines
1 KiB
Go
51 lines
1 KiB
Go
package hashtools
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import (
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"crypto"
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"hash"
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)
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// HashTool holds generic information about a hash tool.
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type HashTool struct {
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Name string
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Hash crypto.Hash
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DigestSize int // in bytes
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BlockSize int // in bytes
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SecurityLevel int // approx. attack complexity as 2^n
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Comment string
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Author string
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}
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// New returns a new hash.Hash instance of the hash tool.
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func (ht *HashTool) New() hash.Hash {
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return ht.Hash.New()
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}
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// With uses the original HashTool as a template for a new HashTool and returns the new HashTool.
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func (ht *HashTool) With(changes *HashTool) *HashTool {
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if changes.Name == "" {
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changes.Name = ht.Name
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}
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if changes.Hash == 0 {
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changes.Hash = ht.Hash
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}
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if changes.DigestSize == 0 {
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changes.DigestSize = ht.DigestSize
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}
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if changes.BlockSize == 0 {
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changes.BlockSize = ht.BlockSize
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}
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if changes.SecurityLevel == 0 {
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changes.SecurityLevel = ht.SecurityLevel
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}
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if changes.Comment == "" {
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changes.Comment = ht.Comment
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}
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if changes.Author == "" {
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changes.Author = ht.Author
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}
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return changes
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}
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