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SBOM/SPDX Generation: Add CPE information for CVE security s… #102

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Merged
merged 3 commits into from
Apr 8, 2024
Merged

SBOM/SPDX Generation: Add CPE information for CVE security s… #102

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SBOM/SPDX Generation: Add CPE information for CVE security scanners
timesys-nathan Mar 21, 2024
e098665
Merge branch 'main' into sbom_add_cpe_info
AniruddhaKanhere Apr 3, 2024
ec11a33
Merge branch 'main' into sbom_add_cpe_info
Skptak Apr 5, 2024
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21 changes: 21 additions & 0 deletions sbom-generator/sbom_utils.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import hashlib
import re
from datetime import datetime

SPDX_VERSION = 'SPDX-2.2'
Expand Down Expand Up @@ -29,11 +30,31 @@ def file_writer(output, filepath: str, sha1: str, license: str, copyright='NOASS
output.write('FileComment: '+ comment + '\n')
output.write('\n')

def cpe_writer(output, packageName: str, version: str):
#Example: release/v6.0.5 -> v6.0.5
version_stripped = re.sub(r'.*/', '', version)
#Example: v6.0.5 -> 6.0.5
version_stripped = re.sub('^v', '', version_stripped)

#Map package name to part:vendor:product
# Note: All of these have existing CPEs in the NVD
specifier_lookup = {
'FreeRTOS-Kernel': 'o:amazon:freertos:',
'FreeRTOS-Plus-FAT': 'o:amazon:freertos\\+fat:',
'mbedtls': 'a:arm:mbed_tls:',
'llhttp': 'a:llhttp:llhttp:',
}

#If there are no existing CPEs in NVD -- nothing to do for now
if packageName in specifier_lookup:
output.write('ExternalRef: SECURITY cpe23Type cpe:2.3:' + specifier_lookup[packageName] + version_stripped + ':*:*:*:*:*:*:*' + '\n')

def package_writer(output, packageName: str, version: str, url: str, license: str, ver_code: str, file_analyzed=True,
copyright='NOASSERTION', summary='NOASSERTION', description='NOASSERTION', file_licenses='NOASSERTION'):
output.write('PackageName: '+ packageName + '\n')
output.write('SPDXID: SPDXRef-Package-'+ packageName + '\n')
output.write('PackageVersion: '+ version + '\n')
cpe_writer(output, packageName, version)
output.write('PackageDownloadLocation: '+ url + '\n')
output.write('PackageLicenseDeclared: ' + license + '\n')
output.write('PackageLicenseConcluded: '+ license + '\n')
Expand Down