2019-04-16 18:10:04 +08:00
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/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include "apps.h"
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#include "progs.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/kdf.h>
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2019-08-21 16:53:45 +08:00
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#include <openssl/params.h>
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2019-04-16 18:10:04 +08:00
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_KDFOPT, OPT_BIN, OPT_KEYLEN, OPT_OUT
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} OPTION_CHOICE;
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const OPTIONS kdf_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [options] kdf_name\n"},
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2019-11-08 04:08:30 +08:00
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OPT_SECTION("General"),
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2019-04-16 18:10:04 +08:00
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{"help", OPT_HELP, '-', "Display this summary"},
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2019-09-20 09:33:17 +08:00
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{"kdfopt", OPT_KDFOPT, 's', "KDF algorithm control parameters in n:v form"},
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{OPT_MORE_STR, 1, '-', "See 'Supported Controls' in the EVP_KDF_ docs\n"},
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2019-04-16 18:10:04 +08:00
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{"keylen", OPT_KEYLEN, 's', "The size of the output derived key"},
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2019-11-08 04:08:30 +08:00
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OPT_SECTION("Output"),
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2019-04-16 18:10:04 +08:00
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{"out", OPT_OUT, '>', "Output to filename rather than stdout"},
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2019-09-20 09:33:17 +08:00
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{"binary", OPT_BIN, '-',
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"Output in binary format (default is hexadecimal)"},
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OPT_PARAMETERS(),
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{"kdf_name", 0, 0, "Name of the KDF algorithm"},
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2019-04-16 18:10:04 +08:00
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{NULL}
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};
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int kdf_main(int argc, char **argv)
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{
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2019-08-21 16:53:45 +08:00
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int ret = 1, out_bin = 0;
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2019-04-16 18:10:04 +08:00
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OPTION_CHOICE o;
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STACK_OF(OPENSSL_STRING) *opts = NULL;
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char *prog, *hexout = NULL;
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const char *outfile = NULL;
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unsigned char *dkm_bytes = NULL;
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size_t dkm_len = 0;
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BIO *out = NULL;
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2019-08-21 16:53:45 +08:00
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EVP_KDF *kdf = NULL;
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2019-04-16 18:10:04 +08:00
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EVP_KDF_CTX *ctx = NULL;
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prog = opt_init(argc, argv, kdf_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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default:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto err;
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case OPT_HELP:
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opt_help(kdf_options);
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ret = 0;
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goto err;
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case OPT_BIN:
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out_bin = 1;
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break;
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case OPT_KEYLEN:
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dkm_len = (size_t)atoi(opt_arg());
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break;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_KDFOPT:
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if (opts == NULL)
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opts = sk_OPENSSL_STRING_new_null();
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if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
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goto opthelp;
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break;
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}
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}
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argc = opt_num_rest();
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argv = opt_rest();
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if (argc != 1) {
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BIO_printf(bio_err, "Invalid number of extra arguments\n");
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goto opthelp;
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}
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2019-08-21 16:53:45 +08:00
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if ((kdf = EVP_KDF_fetch(NULL, argv[0], NULL)) == NULL) {
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2019-04-16 18:10:04 +08:00
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BIO_printf(bio_err, "Invalid KDF name %s\n", argv[0]);
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goto opthelp;
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}
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2019-08-21 16:53:45 +08:00
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ctx = EVP_KDF_CTX_new(kdf);
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2019-04-16 18:10:04 +08:00
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if (ctx == NULL)
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goto err;
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if (opts != NULL) {
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2019-08-21 16:53:45 +08:00
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int ok = 1;
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OSSL_PARAM *params =
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2019-09-27 14:35:45 +08:00
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app_params_new_from_opts(opts, EVP_KDF_settable_ctx_params(kdf));
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2019-08-21 16:53:45 +08:00
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if (params == NULL)
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goto err;
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if (!EVP_KDF_CTX_set_params(ctx, params)) {
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BIO_printf(bio_err, "KDF parameter error\n");
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ERR_print_errors(bio_err);
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ok = 0;
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2019-04-16 18:10:04 +08:00
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}
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2019-08-21 16:53:45 +08:00
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app_params_free(params);
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if (!ok)
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goto err;
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2019-04-16 18:10:04 +08:00
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}
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out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
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if (out == NULL)
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goto err;
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if (dkm_len <= 0) {
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BIO_printf(bio_err, "Invalid derived key length.\n");
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goto err;
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}
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dkm_bytes = app_malloc(dkm_len, "out buffer");
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if (dkm_bytes == NULL)
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goto err;
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if (!EVP_KDF_derive(ctx, dkm_bytes, dkm_len)) {
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BIO_printf(bio_err, "EVP_KDF_derive failed\n");
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goto err;
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}
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if (out_bin) {
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BIO_write(out, dkm_bytes, dkm_len);
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} else {
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hexout = OPENSSL_buf2hexstr(dkm_bytes, dkm_len);
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2019-11-27 01:15:20 +08:00
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if (hexout == NULL) {
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BIO_printf(bio_err, "Memory allocation failure\n");
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goto err;
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}
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2019-04-16 18:10:04 +08:00
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BIO_printf(out, "%s\n\n", hexout);
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}
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ret = 0;
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err:
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if (ret != 0)
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ERR_print_errors(bio_err);
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OPENSSL_clear_free(dkm_bytes, dkm_len);
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sk_OPENSSL_STRING_free(opts);
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2019-08-21 16:53:45 +08:00
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EVP_KDF_free(kdf);
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2019-04-16 18:10:04 +08:00
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EVP_KDF_CTX_free(ctx);
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BIO_free(out);
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OPENSSL_free(hexout);
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return ret;
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}
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