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git.ipfire.org Git - thirdparty/openssl.git/blob - apps/kdf.c
2 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
,
26 const OPTIONS kdf_options
[] = {
27 {OPT_HELP_STR
, 1, '-', "Usage: %s [options] kdf_name\n"},
29 OPT_SECTION("General"),
30 {"help", OPT_HELP
, '-', "Display this summary"},
31 {"kdfopt", OPT_KDFOPT
, 's', "KDF algorithm control parameters in n:v form"},
32 {OPT_MORE_STR
, 1, '-', "See 'Supported Controls' in the EVP_KDF_ docs\n"},
33 {"keylen", OPT_KEYLEN
, 's', "The size of the output derived key"},
35 OPT_SECTION("Output"),
36 {"out", OPT_OUT
, '>', "Output to filename rather than stdout"},
37 {"binary", OPT_BIN
, '-',
38 "Output in binary format (default is hexadecimal)"},
43 {"kdf_name", 0, 0, "Name of the KDF algorithm"},
47 int kdf_main(int argc
, char **argv
)
49 int ret
= 1, out_bin
= 0;
51 STACK_OF(OPENSSL_STRING
) *opts
= NULL
;
52 char *prog
, *hexout
= NULL
;
53 const char *outfile
= NULL
;
54 unsigned char *dkm_bytes
= NULL
;
58 EVP_KDF_CTX
*ctx
= NULL
;
60 prog
= opt_init(argc
, argv
, kdf_options
);
61 while ((o
= opt_next()) != OPT_EOF
) {
65 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
68 opt_help(kdf_options
);
75 dkm_len
= (size_t)atoi(opt_arg());
82 opts
= sk_OPENSSL_STRING_new_null();
83 if (opts
== NULL
|| !sk_OPENSSL_STRING_push(opts
, opt_arg()))
92 argc
= opt_num_rest();
96 BIO_printf(bio_err
, "Invalid number of extra arguments\n");
100 if ((kdf
= EVP_KDF_fetch(NULL
, argv
[0], NULL
)) == NULL
) {
101 BIO_printf(bio_err
, "Invalid KDF name %s\n", argv
[0]);
105 ctx
= EVP_KDF_CTX_new(kdf
);
112 app_params_new_from_opts(opts
, EVP_KDF_settable_ctx_params(kdf
));
117 if (!EVP_KDF_CTX_set_params(ctx
, params
)) {
118 BIO_printf(bio_err
, "KDF parameter error\n");
119 ERR_print_errors(bio_err
);
122 app_params_free(params
);
127 out
= bio_open_default(outfile
, 'w', out_bin
? FORMAT_BINARY
: FORMAT_TEXT
);
132 BIO_printf(bio_err
, "Invalid derived key length.\n");
135 dkm_bytes
= app_malloc(dkm_len
, "out buffer");
136 if (dkm_bytes
== NULL
)
139 if (!EVP_KDF_derive(ctx
, dkm_bytes
, dkm_len
)) {
140 BIO_printf(bio_err
, "EVP_KDF_derive failed\n");
145 BIO_write(out
, dkm_bytes
, dkm_len
);
147 hexout
= OPENSSL_buf2hexstr(dkm_bytes
, dkm_len
);
148 if (hexout
== NULL
) {
149 BIO_printf(bio_err
, "Memory allocation failure\n");
152 BIO_printf(out
, "%s\n\n", hexout
);
158 ERR_print_errors(bio_err
);
159 OPENSSL_clear_free(dkm_bytes
, dkm_len
);
160 sk_OPENSSL_STRING_free(opts
);
162 EVP_KDF_CTX_free(ctx
);
164 OPENSSL_free(hexout
);