]> git.ipfire.org Git - thirdparty/openssl.git/blob - apps/kdf.c
Fix stacks of OPENSSL_STRING, OPENSSL_CSTRING and OPENSSL_BLOCK
[thirdparty/openssl.git] / apps / kdf.c
1 /*
2 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10 #include <string.h>
11
12 #include "apps.h"
13 #include "progs.h"
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>
19
20 typedef enum OPTION_choice {
21 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
22 OPT_KDFOPT, OPT_BIN, OPT_KEYLEN, OPT_OUT,
23 OPT_PROV_ENUM
24 } OPTION_CHOICE;
25
26 const OPTIONS kdf_options[] = {
27 {OPT_HELP_STR, 1, '-', "Usage: %s [options] kdf_name\n"},
28
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"},
34
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)"},
39
40 OPT_PROV_OPTIONS,
41
42 OPT_PARAMETERS(),
43 {"kdf_name", 0, 0, "Name of the KDF algorithm"},
44 {NULL}
45 };
46
47 int kdf_main(int argc, char **argv)
48 {
49 int ret = 1, out_bin = 0;
50 OPTION_CHOICE o;
51 STACK_OF(OPENSSL_STRING) *opts = NULL;
52 char *prog, *hexout = NULL;
53 const char *outfile = NULL;
54 unsigned char *dkm_bytes = NULL;
55 size_t dkm_len = 0;
56 BIO *out = NULL;
57 EVP_KDF *kdf = NULL;
58 EVP_KDF_CTX *ctx = NULL;
59
60 prog = opt_init(argc, argv, kdf_options);
61 while ((o = opt_next()) != OPT_EOF) {
62 switch (o) {
63 default:
64 opthelp:
65 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
66 goto err;
67 case OPT_HELP:
68 opt_help(kdf_options);
69 ret = 0;
70 goto err;
71 case OPT_BIN:
72 out_bin = 1;
73 break;
74 case OPT_KEYLEN:
75 dkm_len = (size_t)atoi(opt_arg());
76 break;
77 case OPT_OUT:
78 outfile = opt_arg();
79 break;
80 case OPT_KDFOPT:
81 if (opts == NULL)
82 opts = sk_OPENSSL_STRING_new_null();
83 if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
84 goto opthelp;
85 break;
86 case OPT_PROV_CASES:
87 if (!opt_provider(o))
88 goto err;
89 break;
90 }
91 }
92 argc = opt_num_rest();
93 argv = opt_rest();
94
95 if (argc != 1) {
96 BIO_printf(bio_err, "Invalid number of extra arguments\n");
97 goto opthelp;
98 }
99
100 if ((kdf = EVP_KDF_fetch(NULL, argv[0], NULL)) == NULL) {
101 BIO_printf(bio_err, "Invalid KDF name %s\n", argv[0]);
102 goto opthelp;
103 }
104
105 ctx = EVP_KDF_CTX_new(kdf);
106 if (ctx == NULL)
107 goto err;
108
109 if (opts != NULL) {
110 int ok = 1;
111 OSSL_PARAM *params =
112 app_params_new_from_opts(opts, EVP_KDF_settable_ctx_params(kdf));
113
114 if (params == NULL)
115 goto err;
116
117 if (!EVP_KDF_CTX_set_params(ctx, params)) {
118 BIO_printf(bio_err, "KDF parameter error\n");
119 ERR_print_errors(bio_err);
120 ok = 0;
121 }
122 app_params_free(params);
123 if (!ok)
124 goto err;
125 }
126
127 out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
128 if (out == NULL)
129 goto err;
130
131 if (dkm_len <= 0) {
132 BIO_printf(bio_err, "Invalid derived key length.\n");
133 goto err;
134 }
135 dkm_bytes = app_malloc(dkm_len, "out buffer");
136 if (dkm_bytes == NULL)
137 goto err;
138
139 if (!EVP_KDF_derive(ctx, dkm_bytes, dkm_len)) {
140 BIO_printf(bio_err, "EVP_KDF_derive failed\n");
141 goto err;
142 }
143
144 if (out_bin) {
145 BIO_write(out, dkm_bytes, dkm_len);
146 } else {
147 hexout = OPENSSL_buf2hexstr(dkm_bytes, dkm_len);
148 if (hexout == NULL) {
149 BIO_printf(bio_err, "Memory allocation failure\n");
150 goto err;
151 }
152 BIO_printf(out, "%s\n\n", hexout);
153 }
154
155 ret = 0;
156 err:
157 if (ret != 0)
158 ERR_print_errors(bio_err);
159 OPENSSL_clear_free(dkm_bytes, dkm_len);
160 sk_OPENSSL_STRING_free(opts);
161 EVP_KDF_free(kdf);
162 EVP_KDF_CTX_free(ctx);
163 BIO_free(out);
164 OPENSSL_free(hexout);
165 return ret;
166 }