2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 #include <openssl/bio.h>
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/kdf.h>
18 #include <openssl/params.h>
20 typedef enum OPTION_choice {
21 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
22 OPT_KDFOPT, OPT_BIN, OPT_KEYLEN, OPT_OUT
25 const OPTIONS kdf_options[] = {
26 {OPT_HELP_STR, 1, '-', "Usage: %s [options] kdf_name\n"},
28 OPT_SECTION("General"),
29 {"help", OPT_HELP, '-', "Display this summary"},
30 {"kdfopt", OPT_KDFOPT, 's', "KDF algorithm control parameters in n:v form"},
31 {OPT_MORE_STR, 1, '-', "See 'Supported Controls' in the EVP_KDF_ docs\n"},
32 {"keylen", OPT_KEYLEN, 's', "The size of the output derived key"},
34 OPT_SECTION("Output"),
35 {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
36 {"binary", OPT_BIN, '-',
37 "Output in binary format (default is hexadecimal)"},
40 {"kdf_name", 0, 0, "Name of the KDF algorithm"},
44 int kdf_main(int argc, char **argv)
46 int ret = 1, out_bin = 0;
48 STACK_OF(OPENSSL_STRING) *opts = NULL;
49 char *prog, *hexout = NULL;
50 const char *outfile = NULL;
51 unsigned char *dkm_bytes = NULL;
55 EVP_KDF_CTX *ctx = NULL;
57 prog = opt_init(argc, argv, kdf_options);
58 while ((o = opt_next()) != OPT_EOF) {
62 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
65 opt_help(kdf_options);
72 dkm_len = (size_t)atoi(opt_arg());
79 opts = sk_OPENSSL_STRING_new_null();
80 if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
85 argc = opt_num_rest();
89 BIO_printf(bio_err, "Invalid number of extra arguments\n");
93 if ((kdf = EVP_KDF_fetch(NULL, argv[0], NULL)) == NULL) {
94 BIO_printf(bio_err, "Invalid KDF name %s\n", argv[0]);
98 ctx = EVP_KDF_CTX_new(kdf);
105 app_params_new_from_opts(opts, EVP_KDF_settable_ctx_params(kdf));
110 if (!EVP_KDF_CTX_set_params(ctx, params)) {
111 BIO_printf(bio_err, "KDF parameter error\n");
112 ERR_print_errors(bio_err);
115 app_params_free(params);
120 out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
125 BIO_printf(bio_err, "Invalid derived key length.\n");
128 dkm_bytes = app_malloc(dkm_len, "out buffer");
129 if (dkm_bytes == NULL)
132 if (!EVP_KDF_derive(ctx, dkm_bytes, dkm_len)) {
133 BIO_printf(bio_err, "EVP_KDF_derive failed\n");
138 BIO_write(out, dkm_bytes, dkm_len);
140 hexout = OPENSSL_buf2hexstr(dkm_bytes, dkm_len);
141 if (hexout == NULL) {
142 BIO_printf(bio_err, "Memory allocation failure\n");
145 BIO_printf(out, "%s\n\n", hexout);
151 ERR_print_errors(bio_err);
152 OPENSSL_clear_free(dkm_bytes, dkm_len);
153 sk_OPENSSL_STRING_free(opts);
155 EVP_KDF_CTX_free(ctx);
157 OPENSSL_free(hexout);