113 lines
3.2 KiB
Markdown
113 lines
3.2 KiB
Markdown
## borrado minimalista
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Un enfoque inicial que teníamos para el borrado de disco son las siguientes funciones, esto lo hemos descartado para usar una herramienta más avanzada en el borrado [usody-sanitize](https://github.com/usody/sanitize/)
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```python
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## Xavier Functions ##
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def erase_basic(disk):
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"""
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Basic Erasure
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https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917935
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Settings for basic data erasure using shred Linux command.
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A software-based fast non-100%-secured way of erasing data storage.
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Performs 1 pass overwriting one round using all zeros.
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Compliant with NIST SP-800-8y8.
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In settings appear:
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WB_ERASE = EraseBasic
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WB_ERASE_STEPS = 1
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WB_ERASE_LEADING_ZEROS = False
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"""
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cmd = f'shred -vn 1 /dev/{disk}'
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return [exec_cmd_erase(cmd)]
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def erase_baseline(disk):
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"""
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Baseline Secure Erasure
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Settings for advanced data erasure using badblocks Linux software.
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A secured-way of erasing data storages, erase hidden areas,
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checking the erase sector by sector.
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Performs 1 pass overwriting each sector with zeros and a final verification.
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Compliant with HMG Infosec Standard 5 Baseline.
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In settings appear:
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WB_ERASE = EraseSectors
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WB_ERASE_STEPS = 1
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WB_ERASE_LEADING_ZEROS = True
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WB_ERASE_1_METHOD = EraseBasic
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WB_ERASE_1_STEP_TYPE = 0
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WB_ERASE_2_METHOD = EraseSectors
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WB_ERASE_2_STEP_TYPE = 1
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"""
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result = []
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cmd = f'shred -zvn 0 /dev/{disk}'
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result.append(exec_cmd_erase(cmd))
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cmd = f'badblocks -st random -w /dev/{disk}'
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result.append(exec_cmd_erase(cmd))
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return result
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def erase_enhanced(disk):
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"""
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Enhanced Secure Erasure
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Settings for advanced data erasure using badblocks Linux software.
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A secured-way of erasing data storages, erase hidden areas,
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checking the erase sector by sector.
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Performs 3 passes overwriting every sector with zeros and ones,
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and final verification. Compliant with HMG Infosec Standard 5 Enhanced.
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In settings appear:
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WB_ERASE = EraseSectors
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WB_ERASE_LEADING_ZEROS = True
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WB_ERASE_1_METHOD = EraseBasic
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WB_ERASE_1_STEP_TYPE = 1
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WB_ERASE_2_METHOD = EraseBasic
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WB_ERASE_2_STEP_TYPE = 0
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WB_ERASE_3_METHOD = EraseSectors
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WB_ERASE_3_STEP_TYPE = 1
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"""
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result = []
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cmd = f'shred -vn 1 /dev/{disk}'
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result.append(exec_cmd_erase(cmd))
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cmd = f'shred -zvn 0 /dev/{disk}'
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result.append(exec_cmd_erase(cmd))
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## creo que realmente seria asi (3 pases y una extra poniendo a ceros):
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# shred -zvn 3 /def/{disk}
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# tampoco estoy seguro que el badblocks haga un proceso de verificacion.
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cmd = f'badblocks -st random -w /dev/{disk}'
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result.append(exec_cmd_erase(cmd))
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return result
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## End Xavier Functions ##
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## Erase Functions ##
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def ata_secure_erase_null(disk):
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cmd_baseline = f'hdparm --user-master u --security-erase NULL /dev/{disk}'
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return [exec_cmd_erase(cmd_baseline)]
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def ata_secure_erase_enhanced(disk):
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cmd_enhanced = f'hdparm --user-master u --security-erase-enhanced /dev/{disk}'
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return [exec_cmd_erase(cmd_enhanced)]
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def nvme_secure_erase(disk):
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cmd_encrypted = f'nvme format /dev/{disk} --ses=1'
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return [exec_cmd_erase(cmd_encrypted)]
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## End Erase Functions ##
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```
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