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git.ipfire.org Git - thirdparty/openssl.git/blob - apps/kdf.c
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
);