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generate_test_keys: move output file writing to a separate function

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This helps removing the previous pylint exception.

Also use "with" statement for opening the file in order to
ensure that all the content is flushed to the file before
exiting.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2024-05-06 12:39:26 +02:00
parent 42efdd83ff
commit d714259c01
1 changed files with 30 additions and 25 deletions
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55
tests/scripts/generate_test_keys.py
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@ -6,7 +6,7 @@
"""Module generating EC and RSA keys to be used in test_suite_pk instead of
generating the required key at run time. This helps speeding up testing."""
from typing import Iterator
from typing import Iterator, List
import re
import argparse
import scripts_path # pylint: disable=unused-import
@ -89,8 +89,33 @@ def get_look_up_table_entry(key_type: str, group_id_or_keybits: str,
yield " {0}, sizeof({0}),\n".format(priv_array_name)
yield " {0}, sizeof({0}) }},".format(pub_array_name)
def write_output_file(output_file_name: str, arrays: List[str], look_up_table: List[str]):
with open(output_file_name, 'wt') as output:
output.write("""
/*********************************************************************************
* This file was automatically generated from tests/scripts/generate_test_keys.py.
* Please do not edit it manually.
*********************************************************************************/
""")
output.write(''.join(arrays))
output.write("""
struct predefined_key_element {{
int group_id; // EC group ID; 0 for RSA keys
int keybits; // bits size of RSA key; 0 for EC keys
const unsigned char *priv_key;
size_t priv_key_len;
const unsigned char *pub_key;
size_t pub_key_len;
}};
struct predefined_key_element predefined_keys[] = {{
{}
}};
""".format("\n".join(look_up_table)))
def main() -> None:
#pylint: disable=too-many-locals
default_output_path = guess_project_root() + "/tests/src/test_keys.h"
argparser = argparse.ArgumentParser()
@ -98,14 +123,8 @@ def main() -> None:
args = argparser.parse_args()
output_file = args.output
output_file = open(output_file, 'wt')
output_file.write(
"/*********************************************************************************\n" +
" * This file was automatically generated from tests/scripts/generate_test_keys.py.\n" +
" * Please do not edit it manually.\n" +
" *********************************************************************************/\n"
)
arrays = []
look_up_table = []
# Get a list of private keys only in order to get a single item for every
@ -139,7 +158,7 @@ def main() -> None:
c_array_priv = convert_der_to_c(array_name_priv, ASYMMETRIC_KEY_DATA[priv_key][bits])
c_array_pub = convert_der_to_c(array_name_pub, ASYMMETRIC_KEY_DATA[pub_key][bits])
# Write the C array to the output file
output_file.write(''.join(["\n", c_array_priv, "\n", c_array_pub, "\n"]))
arrays.append(''.join(["\n", c_array_priv, "\n", c_array_pub, "\n"]))
# Update the lookup table
if key_type == "ec":
group_id_or_keybits = "MBEDTLS_ECP_DP_" + curve.upper()
@ -147,22 +166,8 @@ def main() -> None:
group_id_or_keybits = str(bits)
look_up_table.append(''.join(get_look_up_table_entry(key_type, group_id_or_keybits,
array_name_priv, array_name_pub)))
# Write the lookup table: the struct containing pointers to all the arrays we created above.
output_file.write("""
struct predefined_key_element {
int group_id; // EC group ID; 0 for RSA keys
int keybits; // bits size of RSA key; 0 for EC keys
const unsigned char *priv_key;
size_t priv_key_len;
const unsigned char *pub_key;
size_t pub_key_len;
};
struct predefined_key_element predefined_keys[] = {
""")
output_file.write("\n".join(look_up_table))
output_file.write("\n};\n")
output_file.flush()
write_output_file(output_file, arrays, look_up_table)
if __name__ == '__main__':
main()