| Olivier Masse | a19c6d9 | 2024-05-15 10:40:19 +0200 | [diff] [blame] | 1 | #!/usr/bin/env python3 |
| 2 | # SPDX-License-Identifier: BSD-2-Clause |
| 3 | # |
| 4 | # Copyright 2024 NXP |
| 5 | # |
| 6 | |
| Olivier Masse | 9d56621 | 2024-01-30 09:18:34 +0100 | [diff] [blame] | 7 | import json |
| 8 | |
| 9 | modes = {'encrypt': 0, 'decrypt': 1} |
| 10 | |
| 11 | |
| 12 | def to_compound_str(name, val): |
| 13 | assert len(val) % 2 == 0, "Only even sized values supported" |
| 14 | if len(val) > 0: |
| 15 | import re |
| 16 | a = re.findall('..', val) |
| 17 | b = name + " = (const uint8_t []){ " |
| 18 | for s in a: |
| 19 | b += "0x" + s + ", " |
| 20 | b += "},\n\t" + name + "_len = " + repr((int)(len(val) / 2)) + "," |
| 21 | else: |
| 22 | b = name + " = NULL,\n\t" + name + "_len = 0," |
| 23 | return b |
| 24 | |
| 25 | |
| 26 | def generate_case(outf, tv, mode): |
| 27 | outf.write('{\n\t.algo = TEE_ALG_AES_GCM, .mode = ' + mode + |
| 28 | ', .key_type = TEE_TYPE_AES,\n') |
| 29 | outf.write('\t' + to_compound_str('.key', tv['key']) + '\n') |
| 30 | outf.write('\t' + to_compound_str('.nonce', tv['iv']) + '\n') |
| 31 | outf.write('\t.aad_incr = 0,\n') |
| 32 | outf.write('\t' + to_compound_str('.aad', tv['aad']) + '\n') |
| 33 | outf.write('\t.in_incr = 0,\n') |
| 34 | outf.write('\t' + to_compound_str('.ptx', tv['msg']) + '\n') |
| 35 | outf.write('\t' + to_compound_str('.ctx', tv['ct']) + '\n') |
| 36 | outf.write('\t' + to_compound_str('.tag', tv['tag']) + '\n') |
| 37 | outf.write('\t.line = __LINE__,\n') |
| 38 | outf.write('\t.id = ' + repr(tv['tcId']) + '\n},\n') |
| 39 | |
| 40 | |
| 41 | def get_args(): |
| 42 | import argparse |
| 43 | |
| 44 | parser = argparse.ArgumentParser() |
| 45 | |
| 46 | parser.add_argument('--inf', required=True, |
| 47 | type=argparse.FileType('r'), |
| 48 | help='Name of input json file') |
| 49 | |
| 50 | parser.add_argument('--outf', required=True, |
| 51 | type=argparse.FileType('w'), |
| 52 | help='Name of output C file') |
| 53 | |
| 54 | parser.add_argument('--mode', required=True, choices=modes.keys(), |
| 55 | help='mode: encrypt or decrypt') |
| 56 | |
| 57 | return parser.parse_args() |
| 58 | |
| 59 | |
| 60 | # Convert google/wycheproof AES GCM test vectors to xtest AE test cases |
| 61 | def main(): |
| 62 | args = get_args() |
| 63 | inf = args.inf |
| 64 | outf = args.outf |
| 65 | |
| 66 | outf.write("/* SPDX-License-Identifier: Apache-2.0 */\n") |
| 67 | outf.write("/*\n") |
| 68 | outf.write(" * Copyright 2024 NXP\n") |
| 69 | outf.write(" */\n\n") |
| 70 | |
| 71 | if args.mode == "encrypt": |
| 72 | mode = "TEE_MODE_ENCRYPT" |
| 73 | else: |
| 74 | mode = "TEE_MODE_DECRYPT" |
| 75 | |
| 76 | data = json.load(inf) |
| 77 | |
| 78 | for tg in data['testGroups']: |
| 79 | for tv in tg['tests']: |
| 80 | if tv['result'] == 'valid' and 'CounterWrap' in tv['flags']: |
| 81 | generate_case(outf, tv, mode) |
| 82 | |
| 83 | |
| 84 | if __name__ == "__main__": |
| 85 | main() |