Re: [PATCH v3 1/6] sign-file: refactor argument parsing logic

From: Greg KH
Date: Tue Feb 14 2023 - 02:05:28 EST


On Tue, Feb 14, 2023 at 12:30:29AM +0530, Shreenidhi Shedi wrote:
> - Use getopt_long_only for parsing input args
> - Use more easy to remember command line argument names
>
> Signed-off-by: Shreenidhi Shedi <sshedi@xxxxxxxxxx>
> ---
> scripts/sign-file.c | 156 ++++++++++++++++++++++++++++++++++----------
> 1 file changed, 122 insertions(+), 34 deletions(-)
>
> diff --git a/scripts/sign-file.c b/scripts/sign-file.c
> index 598ef5465f82..cf3acbb13013 100644
> --- a/scripts/sign-file.c
> +++ b/scripts/sign-file.c
> @@ -213,15 +213,111 @@ static X509 *read_x509(const char *x509_name)
> return x509;
> }
>
> +struct cmd_opts {
> + char *hash_algo;
> + char *dest_name;
> + char *private_key_name;
> + char *raw_sig_name;
> + char *x509_name;
> + char *module_name;
> + bool save_sig;
> + bool replace_orig;
> + bool raw_sig;
> + bool sign_only;
> +
> +#ifndef USE_PKCS7
> + unsigned int use_keyid;
> +#endif
> +};
> +
> +void parse_args(int argc, char **argv, struct cmd_opts *opts)
> +{
> + struct option cmd_options[] = {
> + /* These options set a flag. */
> + {"help", no_argument, 0, 'h'},
> + {"savesig", no_argument, 0, 's'},
> + {"signonly", no_argument, 0, 'o'},
> +#ifndef USE_PKCS7
> + {"usekeyid", no_argument, 0, 'k'},
> +#endif
> + {"rawsig", required_argument, 0, 'r'},
> + {"privkey", required_argument, 0, 'p'},
> + {"hashalgo", required_argument, 0, 'a'},
> + {"x509", required_argument, 0, 'x'},
> + {"dest", required_argument, 0, 'd'},
> + {"replaceorig", required_argument, 0, 'l'},
> + {0, 0, 0, 0}
> + };
> +
> + int opt;
> + int opt_index = 0;
> +
> + do {
> +#ifndef USE_PKCS7
> + opt = getopt_long_only(argc, argv, "hsobr:p:a:x:d:l:",
> + cmd_options, &opt_index);
> +#else
> + opt = getopt_long_only(argc, argv, "hsobkr:p:a:x:d:l:",
> + cmd_options, &opt_index);
> +#endif
> + switch (opt) {
> + case 'h':
> + format();
> + break;
> +
> + case 'r':
> + opts->raw_sig = true;
> + opts->raw_sig_name = optarg;
> + break;
> +
> + case 's':
> + opts->save_sig = true;
> + break;
> +
> + case 'o':
> + opts->sign_only = true;
> + opts->save_sig = true;
> + break;
> +
> +#ifndef USE_PKCS7
> + case 'k':
> + opts->use_keyid = CMS_USE_KEYID;
> + break;
> +#endif
> +
> + case 'p':
> + opts->private_key_name = optarg;
> + break;
> +
> + case 'a':
> + opts->hash_algo = optarg;
> + break;
> +
> + case 'x':
> + opts->x509_name = optarg;
> + break;
> +
> + case 'd':
> + opts->dest_name = optarg;
> + break;
> +
> + case 'l':
> + opts->replace_orig = true;
> + break;
> +
> + case -1:
> + break;
> +
> + default:
> + format();
> + break;
> + }
> + } while (opt != -1);
> +}
> +
> int main(int argc, char **argv)
> {
> struct module_signature sig_info = { .id_type = PKEY_ID_PKCS7 };
> - char *hash_algo = NULL;
> - char *private_key_name = NULL, *raw_sig_name = NULL;
> - char *x509_name, *module_name, *dest_name;
> - bool save_sig = false, replace_orig;
> - bool sign_only = false;
> - bool raw_sig = false;
> unsigned char buf[4096];
> unsigned long module_size, sig_size;
> unsigned int use_signed_attrs;
> @@ -229,13 +325,14 @@ int main(int argc, char **argv)
> EVP_PKEY *private_key;
> #ifndef USE_PKCS7
> CMS_ContentInfo *cms = NULL;
> - unsigned int use_keyid = 0;
> #else
> PKCS7 *pkcs7 = NULL;
> #endif
> X509 *x509;
> BIO *bd, *bm;
> - int opt, n;
> + int i, n;
> + struct cmd_opts opts = {0};
> +
> OpenSSL_add_all_algorithms();
> ERR_load_crypto_strings();
> ERR_clear_error();
> @@ -247,37 +344,29 @@ int main(int argc, char **argv)
> #else
> use_signed_attrs = PKCS7_NOATTR;
> #endif
> + parse_args(argc, argv, &opts);
> + argc -= optind;
> + argv += optind;
> +
> + char *hash_algo = opts.hash_algo;
> + char *dest_name = opts.dest_name;
> + char *private_key_name = opts.private_key_name;
> + char *raw_sig_name = opts.raw_sig_name;
> + char *x509_name = opts.x509_name;
> + char *module_name = opts.module_name;
> + bool save_sig = opts.save_sig;
> + bool replace_orig = opts.replace_orig;
> + bool raw_sig = opts.raw_sig;
> + bool sign_only = opts.sign_only;
>
> - do {
> - opt = getopt(argc, argv, "sdpk");
> - switch (opt) {
> - case 's': raw_sig = true; break;
> - case 'p': save_sig = true; break;
> - case 'd': sign_only = true; save_sig = true; break;
> #ifndef USE_PKCS7
> - case 'k': use_keyid = CMS_USE_KEYID; break;
> + unsigned int use_keyid = opts.use_keyid;
> #endif
> - case -1: break;
> - default: format();
> - }
> - } while (opt != -1);
>
> - argc -= optind;
> - argv += optind;
> - if (argc < 4 || argc > 5)
> + if (!argv[0] || argc != 1)
> format();
>
> - if (raw_sig) {
> - raw_sig_name = argv[0];
> - hash_algo = argv[1];
> - } else {
> - hash_algo = argv[0];
> - private_key_name = argv[1];
> - }
> - x509_name = argv[2];
> - module_name = argv[3];
> - if (argc == 5 && strcmp(argv[3], argv[4]) != 0) {
> - dest_name = argv[4];
> + if (dest_name && strcmp(argv[0], dest_name)) {
> replace_orig = false;
> } else {
> ERR(asprintf(&dest_name, "%s.~signed~", module_name) < 0,
> @@ -292,7 +381,6 @@ int main(int argc, char **argv)
> exit(3);
> }
> #endif
> -
> /* Open the module file */
> bm = BIO_new_file(module_name, "rb");
> ERR(!bm, "%s", module_name);
> --
> 2.39.1
>

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him
a patch that has triggered this response. He used to manually respond
to these common problems, but in order to save his sanity (he kept
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created. Hopefully you will not take offence and will fix the problem
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Please read the section entitled "The canonical patch format" in the
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thanks,

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