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"},
27 {OPT_HELP_STR, 1, '-', "kdf_name\t KDF algorithm.\n"},
28 {"help", OPT_HELP, '-', "Display this summary"},
29 {"kdfopt", OPT_KDFOPT, 's', "KDF algorithm control parameters in n:v form. "
30 "See 'Supported Controls' in the EVP_KDF_ docs"},
31 {"keylen", OPT_KEYLEN, 's', "The size of the output derived key"},
32 {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
33 {"binary", OPT_BIN, '-', "Output in binary format (Default is hexadecimal "
38 int kdf_main(int argc, char **argv)
40 int ret = 1, out_bin = 0;
42 STACK_OF(OPENSSL_STRING) *opts = NULL;
43 char *prog, *hexout = NULL;
44 const char *outfile = NULL;
45 unsigned char *dkm_bytes = NULL;
49 EVP_KDF_CTX *ctx = NULL;
51 prog = opt_init(argc, argv, kdf_options);
52 while ((o = opt_next()) != OPT_EOF) {
56 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
59 opt_help(kdf_options);
66 dkm_len = (size_t)atoi(opt_arg());
73 opts = sk_OPENSSL_STRING_new_null();
74 if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
79 argc = opt_num_rest();
83 BIO_printf(bio_err, "Invalid number of extra arguments\n");
87 if ((kdf = EVP_KDF_fetch(NULL, argv[0], NULL)) == NULL) {
88 BIO_printf(bio_err, "Invalid KDF name %s\n", argv[0]);
92 ctx = EVP_KDF_CTX_new(kdf);
99 app_params_new_from_opts(opts, EVP_KDF_CTX_settable_params(kdf));
104 if (!EVP_KDF_CTX_set_params(ctx, params)) {
105 BIO_printf(bio_err, "KDF parameter error\n");
106 ERR_print_errors(bio_err);
109 app_params_free(params);
114 out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
119 BIO_printf(bio_err, "Invalid derived key length.\n");
122 dkm_bytes = app_malloc(dkm_len, "out buffer");
123 if (dkm_bytes == NULL)
126 if (!EVP_KDF_derive(ctx, dkm_bytes, dkm_len)) {
127 BIO_printf(bio_err, "EVP_KDF_derive failed\n");
132 BIO_write(out, dkm_bytes, dkm_len);
134 hexout = OPENSSL_buf2hexstr(dkm_bytes, dkm_len);
135 BIO_printf(out, "%s\n\n", hexout);
141 ERR_print_errors(bio_err);
142 OPENSSL_clear_free(dkm_bytes, dkm_len);
143 sk_OPENSSL_STRING_free(opts);
145 EVP_KDF_CTX_free(ctx);
147 OPENSSL_free(hexout);