| 1 | /*
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| 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <openssl/opensslconf.h>
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include <stdlib.h>
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| 14 | #include <string.h>
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| 15 | #include <time.h>
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| 16 | #include "apps.h"
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| 17 | #include "progs.h"
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| 18 | #include <openssl/bio.h>
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| 19 | #include <openssl/err.h>
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| 20 | #include <openssl/dsa.h>
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| 21 | #include <openssl/evp.h>
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| 22 | #include <openssl/x509.h>
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| 23 | #include <openssl/pem.h>
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| 24 | #include <openssl/bn.h>
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| 25 | #include <openssl/encoder.h>
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| 26 | #include <openssl/core_names.h>
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| 27 | #include <openssl/core_dispatch.h>
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| 28 |
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| 29 | #ifndef OPENSSL_NO_RC4
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| 30 | # define DEFAULT_PVK_ENCR_STRENGTH 2
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| 31 | #else
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| 32 | # define DEFAULT_PVK_ENCR_STRENGTH 0
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| 33 | #endif
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| 34 |
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| 35 | typedef enum OPTION_choice {
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| 36 | OPT_COMMON,
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| 37 | OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
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| 38 | /* Do not change the order here; see case statements below */
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| 39 | OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
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| 40 | OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
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| 41 | OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT,
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| 42 | OPT_PROV_ENUM
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| 43 | } OPTION_CHOICE;
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| 44 |
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| 45 | const OPTIONS dsa_options[] = {
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| 46 | OPT_SECTION("General"),
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| 47 | {"help", OPT_HELP, '-', "Display this summary"},
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| 48 | {"", OPT_CIPHER, '-', "Any supported cipher"},
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| 49 | #ifndef OPENSSL_NO_RC4
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| 50 | {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
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| 51 | {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
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| 52 | {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
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| 53 | #endif
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| 54 | #ifndef OPENSSL_NO_ENGINE
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| 55 | {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
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| 56 | #endif
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| 57 |
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| 58 | OPT_SECTION("Input"),
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| 59 | {"in", OPT_IN, 's', "Input key"},
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| 60 | {"inform", OPT_INFORM, 'f', "Input format (DER/PEM/PVK); has no effect"},
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| 61 | {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
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| 62 | {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
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| 63 |
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| 64 | OPT_SECTION("Output"),
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| 65 | {"out", OPT_OUT, '>', "Output file"},
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| 66 | {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
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| 67 | {"noout", OPT_NOOUT, '-', "Don't print key out"},
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| 68 | {"text", OPT_TEXT, '-', "Print the key in text"},
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| 69 | {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
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| 70 | {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
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| 71 | {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
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| 72 |
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| 73 | OPT_PROV_OPTIONS,
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| 74 | {NULL}
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| 75 | };
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| 76 |
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| 77 | int dsa_main(int argc, char **argv)
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| 78 | {
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| 79 | BIO *out = NULL;
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| 80 | ENGINE *e = NULL;
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| 81 | EVP_PKEY *pkey = NULL;
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| 82 | EVP_CIPHER *enc = NULL;
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| 83 | char *infile = NULL, *outfile = NULL, *prog;
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| 84 | char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
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| 85 | OPTION_CHOICE o;
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| 86 | int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, noout = 0;
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| 87 | int modulus = 0, pubin = 0, pubout = 0, ret = 1;
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| 88 | int pvk_encr = DEFAULT_PVK_ENCR_STRENGTH;
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| 89 | int private = 0;
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| 90 | const char *output_type = NULL, *ciphername = NULL;
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| 91 | const char *output_structure = NULL;
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| 92 | int selection = 0;
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| 93 | OSSL_ENCODER_CTX *ectx = NULL;
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| 94 |
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| 95 | prog = opt_init(argc, argv, dsa_options);
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| 96 | while ((o = opt_next()) != OPT_EOF) {
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| 97 | switch (o) {
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| 98 | case OPT_EOF:
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| 99 | case OPT_ERR:
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| 100 | opthelp:
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| 101 | ret = 0;
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| 102 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 103 | goto end;
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| 104 | case OPT_HELP:
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| 105 | opt_help(dsa_options);
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| 106 | ret = 0;
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| 107 | goto end;
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| 108 | case OPT_INFORM:
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| 109 | if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
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| 110 | goto opthelp;
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| 111 | break;
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| 112 | case OPT_IN:
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| 113 | infile = opt_arg();
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| 114 | break;
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| 115 | case OPT_OUTFORM:
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| 116 | if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
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| 117 | goto opthelp;
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| 118 | break;
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| 119 | case OPT_OUT:
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| 120 | outfile = opt_arg();
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| 121 | break;
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| 122 | case OPT_ENGINE:
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| 123 | e = setup_engine(opt_arg(), 0);
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| 124 | break;
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| 125 | case OPT_PASSIN:
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| 126 | passinarg = opt_arg();
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| 127 | break;
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| 128 | case OPT_PASSOUT:
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| 129 | passoutarg = opt_arg();
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| 130 | break;
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| 131 | case OPT_PVK_STRONG: /* pvk_encr:= 2 */
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| 132 | case OPT_PVK_WEAK: /* pvk_encr:= 1 */
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| 133 | case OPT_PVK_NONE: /* pvk_encr:= 0 */
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| 134 | #ifndef OPENSSL_NO_RC4
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| 135 | pvk_encr = (o - OPT_PVK_NONE);
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| 136 | #endif
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| 137 | break;
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| 138 | case OPT_NOOUT:
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| 139 | noout = 1;
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| 140 | break;
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| 141 | case OPT_TEXT:
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| 142 | text = 1;
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| 143 | break;
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| 144 | case OPT_MODULUS:
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| 145 | modulus = 1;
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| 146 | break;
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| 147 | case OPT_PUBIN:
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| 148 | pubin = 1;
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| 149 | break;
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| 150 | case OPT_PUBOUT:
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| 151 | pubout = 1;
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| 152 | break;
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| 153 | case OPT_CIPHER:
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| 154 | ciphername = opt_unknown();
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| 155 | break;
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| 156 | case OPT_PROV_CASES:
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| 157 | if (!opt_provider(o))
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| 158 | goto end;
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| 159 | break;
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| 160 | }
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| 161 | }
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| 162 |
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| 163 | /* No extra args. */
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| 164 | argc = opt_num_rest();
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| 165 | if (argc != 0)
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| 166 | goto opthelp;
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| 167 |
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| 168 | if (ciphername != NULL) {
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| 169 | if (!opt_cipher(ciphername, &enc))
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| 170 | goto end;
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| 171 | }
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| 172 | private = pubin || pubout ? 0 : 1;
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| 173 | if (text && !pubin)
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| 174 | private = 1;
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| 175 |
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| 176 | if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
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| 177 | BIO_printf(bio_err, "Error getting passwords\n");
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| 178 | goto end;
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| 179 | }
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| 180 |
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| 181 | BIO_printf(bio_err, "read DSA key\n");
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| 182 | if (pubin)
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| 183 | pkey = load_pubkey(infile, informat, 1, passin, e, "public key");
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| 184 | else
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| 185 | pkey = load_key(infile, informat, 1, passin, e, "private key");
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| 186 |
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| 187 | if (pkey == NULL) {
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| 188 | BIO_printf(bio_err, "unable to load Key\n");
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| 189 | ERR_print_errors(bio_err);
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| 190 | goto end;
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| 191 | }
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| 192 | if (!EVP_PKEY_is_a(pkey, "DSA")) {
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| 193 | BIO_printf(bio_err, "Not a DSA key\n");
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| 194 | goto end;
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| 195 | }
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| 196 |
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| 197 | out = bio_open_owner(outfile, outformat, private);
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| 198 | if (out == NULL)
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| 199 | goto end;
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| 200 |
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| 201 | if (text) {
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| 202 | assert(pubin || private);
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| 203 | if ((pubin && EVP_PKEY_print_public(out, pkey, 0, NULL) <= 0)
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| 204 | || (!pubin && EVP_PKEY_print_private(out, pkey, 0, NULL) <= 0)) {
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| 205 | perror(outfile);
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| 206 | ERR_print_errors(bio_err);
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| 207 | goto end;
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| 208 | }
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| 209 | }
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| 210 |
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| 211 | if (modulus) {
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| 212 | BIGNUM *pub_key = NULL;
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| 213 |
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| 214 | if (!EVP_PKEY_get_bn_param(pkey, "pub", &pub_key)) {
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| 215 | ERR_print_errors(bio_err);
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| 216 | goto end;
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| 217 | }
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| 218 | BIO_printf(out, "Public Key=");
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| 219 | BN_print(out, pub_key);
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| 220 | BIO_printf(out, "\n");
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| 221 | BN_free(pub_key);
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| 222 | }
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| 223 |
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| 224 | if (noout) {
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| 225 | ret = 0;
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| 226 | goto end;
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| 227 | }
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| 228 | BIO_printf(bio_err, "writing DSA key\n");
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| 229 | if (outformat == FORMAT_ASN1) {
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| 230 | output_type = "DER";
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| 231 | } else if (outformat == FORMAT_PEM) {
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| 232 | output_type = "PEM";
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| 233 | } else if (outformat == FORMAT_MSBLOB) {
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| 234 | output_type = "MSBLOB";
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| 235 | } else if (outformat == FORMAT_PVK) {
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| 236 | if (pubin) {
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| 237 | BIO_printf(bio_err, "PVK form impossible with public key input\n");
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| 238 | goto end;
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| 239 | }
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| 240 | output_type = "PVK";
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| 241 | } else {
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| 242 | BIO_printf(bio_err, "bad output format specified for outfile\n");
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| 243 | goto end;
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| 244 | }
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| 245 |
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| 246 | if (outformat == FORMAT_ASN1 || outformat == FORMAT_PEM) {
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| 247 | if (pubout || pubin)
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| 248 | output_structure = "SubjectPublicKeyInfo";
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| 249 | else
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| 250 | output_structure = "type-specific";
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| 251 | }
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| 252 |
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| 253 | /* Select what you want in the output */
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| 254 | if (pubout || pubin) {
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| 255 | selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
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| 256 | } else {
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| 257 | assert(private);
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| 258 | selection = (OSSL_KEYMGMT_SELECT_KEYPAIR
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| 259 | | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
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| 260 | }
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| 261 |
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| 262 | /* Perform the encoding */
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| 263 | ectx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection, output_type,
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| 264 | output_structure, NULL);
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| 265 | if (OSSL_ENCODER_CTX_get_num_encoders(ectx) == 0) {
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| 266 | BIO_printf(bio_err, "%s format not supported\n", output_type);
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| 267 | goto end;
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| 268 | }
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| 269 |
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| 270 | /* Passphrase setup */
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| 271 | if (enc != NULL)
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| 272 | OSSL_ENCODER_CTX_set_cipher(ectx, EVP_CIPHER_get0_name(enc), NULL);
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| 273 |
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| 274 | /* Default passphrase prompter */
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| 275 | if (enc != NULL || outformat == FORMAT_PVK) {
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| 276 | OSSL_ENCODER_CTX_set_passphrase_ui(ectx, get_ui_method(), NULL);
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| 277 | if (passout != NULL)
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| 278 | /* When passout given, override the passphrase prompter */
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| 279 | OSSL_ENCODER_CTX_set_passphrase(ectx,
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| 280 | (const unsigned char *)passout,
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| 281 | strlen(passout));
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| 282 | }
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| 283 |
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| 284 | /* PVK requires a bit more */
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| 285 | if (outformat == FORMAT_PVK) {
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| 286 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
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| 287 |
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| 288 | params[0] = OSSL_PARAM_construct_int("encrypt-level", &pvk_encr);
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| 289 | if (!OSSL_ENCODER_CTX_set_params(ectx, params)) {
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| 290 | BIO_printf(bio_err, "invalid PVK encryption level\n");
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| 291 | goto end;
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| 292 | }
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| 293 | }
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| 294 |
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| 295 | if (!OSSL_ENCODER_to_bio(ectx, out)) {
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| 296 | BIO_printf(bio_err, "unable to write key\n");
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| 297 | goto end;
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| 298 | }
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| 299 | ret = 0;
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| 300 | end:
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| 301 | if (ret != 0)
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| 302 | ERR_print_errors(bio_err);
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| 303 | OSSL_ENCODER_CTX_free(ectx);
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| 304 | BIO_free_all(out);
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| 305 | EVP_PKEY_free(pkey);
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| 306 | EVP_CIPHER_free(enc);
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| 307 | release_engine(e);
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| 308 | OPENSSL_free(passin);
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| 309 | OPENSSL_free(passout);
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| 310 | return ret;
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| 311 | }
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