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57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
package obfuscators
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import (
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"go/ast"
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"go/token"
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)
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type xor struct{}
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// check that the obfuscator interface is implemented
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var _ Obfuscator = xor{}
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func (x xor) Obfuscate(data []byte) *ast.BlockStmt {
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key := make([]byte, len(data))
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genRandBytes(key)
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for i, b := range key {
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data[i] = data[i] ^ b
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}
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return &ast.BlockStmt{List: []ast.Stmt{
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&ast.AssignStmt{
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Lhs: []ast.Expr{&ast.Ident{Name: "key"}},
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Tok: token.DEFINE,
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Rhs: []ast.Expr{dataToByteSlice(key)},
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},
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&ast.AssignStmt{
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Lhs: []ast.Expr{&ast.Ident{Name: "data"}},
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Tok: token.DEFINE,
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Rhs: []ast.Expr{dataToByteSlice(data)},
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},
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&ast.RangeStmt{
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Key: &ast.Ident{Name: "i"},
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Value: &ast.Ident{Name: "b"},
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Tok: token.DEFINE,
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X: &ast.Ident{Name: "key"},
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Body: &ast.BlockStmt{List: []ast.Stmt{
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&ast.AssignStmt{
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Lhs: []ast.Expr{&ast.IndexExpr{
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X: &ast.Ident{Name: "data"},
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Index: &ast.Ident{Name: "i"},
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}},
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Tok: token.ASSIGN,
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Rhs: []ast.Expr{&ast.BinaryExpr{
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X: &ast.IndexExpr{
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X: &ast.Ident{Name: "data"},
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Index: &ast.Ident{Name: "i"},
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},
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Op: token.XOR,
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Y: &ast.Ident{Name: "b"},
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}},
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},
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}},
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},
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}}
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}
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