| 1 | /*
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| 2 | * Copyright 2002-2023 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 <string.h>
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| 11 | #include <openssl/opensslconf.h>
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| 12 | #include <openssl/evp.h>
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| 13 | #include <openssl/encoder.h>
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| 14 | #include <openssl/decoder.h>
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| 15 | #include <openssl/core_names.h>
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| 16 | #include <openssl/core_dispatch.h>
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| 17 | #include <openssl/params.h>
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| 18 | #include <openssl/err.h>
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| 19 |
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| 20 | #include "apps.h"
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| 21 | #include "progs.h"
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| 22 | #include "ec_common.h"
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| 23 |
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| 24 | typedef enum OPTION_choice {
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| 25 | OPT_COMMON,
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| 26 | OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
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| 27 | OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT,
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| 28 | OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER,
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| 29 | OPT_NO_PUBLIC, OPT_CHECK, OPT_PROV_ENUM
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| 30 | } OPTION_CHOICE;
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| 31 |
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| 32 | const OPTIONS ec_options[] = {
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| 33 | OPT_SECTION("General"),
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| 34 | {"help", OPT_HELP, '-', "Display this summary"},
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| 35 | #ifndef OPENSSL_NO_ENGINE
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| 36 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 37 | #endif
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| 38 |
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| 39 | OPT_SECTION("Input"),
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| 40 | {"in", OPT_IN, 's', "Input file"},
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| 41 | {"inform", OPT_INFORM, 'f', "Input format (DER/PEM/P12/ENGINE)"},
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| 42 | {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
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| 43 | {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
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| 44 | {"check", OPT_CHECK, '-', "check key consistency"},
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| 45 | {"", OPT_CIPHER, '-', "Any supported cipher"},
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| 46 | {"param_enc", OPT_PARAM_ENC, 's',
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| 47 | "Specifies the way the ec parameters are encoded"},
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| 48 | {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
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| 49 |
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| 50 | OPT_SECTION("Output"),
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| 51 | {"out", OPT_OUT, '>', "Output file"},
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| 52 | {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
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| 53 | {"noout", OPT_NOOUT, '-', "Don't print key out"},
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| 54 | {"text", OPT_TEXT, '-', "Print the key"},
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| 55 | {"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"},
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| 56 | {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
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| 57 | {"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"},
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| 58 | {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
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| 59 |
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| 60 | OPT_PROV_OPTIONS,
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| 61 | {NULL}
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| 62 | };
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| 63 |
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| 64 | int ec_main(int argc, char **argv)
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| 65 | {
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| 66 | OSSL_ENCODER_CTX *ectx = NULL;
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| 67 | OSSL_DECODER_CTX *dctx = NULL;
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| 68 | EVP_PKEY_CTX *pctx = NULL;
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| 69 | EVP_PKEY *eckey = NULL;
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| 70 | BIO *out = NULL;
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| 71 | ENGINE *e = NULL;
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| 72 | EVP_CIPHER *enc = NULL;
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| 73 | char *infile = NULL, *outfile = NULL, *ciphername = NULL, *prog;
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| 74 | char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
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| 75 | OPTION_CHOICE o;
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| 76 | int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, noout = 0;
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| 77 | int pubin = 0, pubout = 0, param_out = 0, ret = 1, private = 0;
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| 78 | int check = 0;
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| 79 | char *asn1_encoding = NULL;
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| 80 | char *point_format = NULL;
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| 81 | int no_public = 0;
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| 82 |
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| 83 | opt_set_unknown_name("cipher");
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| 84 | prog = opt_init(argc, argv, ec_options);
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| 85 | while ((o = opt_next()) != OPT_EOF) {
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| 86 | switch (o) {
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| 87 | case OPT_EOF:
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| 88 | case OPT_ERR:
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| 89 | opthelp:
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| 90 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 91 | goto end;
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| 92 | case OPT_HELP:
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| 93 | opt_help(ec_options);
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| 94 | ret = 0;
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| 95 | goto end;
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| 96 | case OPT_INFORM:
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| 97 | if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
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| 98 | goto opthelp;
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| 99 | break;
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| 100 | case OPT_IN:
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| 101 | infile = opt_arg();
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| 102 | break;
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| 103 | case OPT_OUTFORM:
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| 104 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
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| 105 | goto opthelp;
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| 106 | break;
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| 107 | case OPT_OUT:
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| 108 | outfile = opt_arg();
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| 109 | break;
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| 110 | case OPT_NOOUT:
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| 111 | noout = 1;
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| 112 | break;
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| 113 | case OPT_TEXT:
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| 114 | text = 1;
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| 115 | break;
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| 116 | case OPT_PARAM_OUT:
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| 117 | param_out = 1;
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| 118 | break;
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| 119 | case OPT_PUBIN:
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| 120 | pubin = 1;
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| 121 | break;
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| 122 | case OPT_PUBOUT:
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| 123 | pubout = 1;
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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_ENGINE:
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| 132 | e = setup_engine(opt_arg(), 0);
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| 133 | break;
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| 134 | case OPT_CIPHER:
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| 135 | ciphername = opt_unknown();
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| 136 | break;
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| 137 | case OPT_CONV_FORM:
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| 138 | point_format = opt_arg();
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| 139 | if (!opt_string(point_format, point_format_options))
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| 140 | goto opthelp;
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| 141 | break;
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| 142 | case OPT_PARAM_ENC:
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| 143 | asn1_encoding = opt_arg();
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| 144 | if (!opt_string(asn1_encoding, asn1_encoding_options))
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| 145 | goto opthelp;
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| 146 | break;
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| 147 | case OPT_NO_PUBLIC:
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| 148 | no_public = 1;
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| 149 | break;
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| 150 | case OPT_CHECK:
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| 151 | check = 1;
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| 152 | break;
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| 153 | case OPT_PROV_CASES:
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| 154 | if (!opt_provider(o))
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| 155 | goto end;
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| 156 | break;
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| 157 | }
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| 158 | }
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| 159 |
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| 160 | /* No extra arguments. */
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| 161 | if (!opt_check_rest_arg(NULL))
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| 162 | goto opthelp;
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| 163 |
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| 164 | if (!opt_cipher(ciphername, &enc))
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| 165 | goto opthelp;
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| 166 | private = !pubin && (text || (!param_out && !pubout));
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| 167 |
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| 168 | if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
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| 169 | BIO_printf(bio_err, "Error getting passwords\n");
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| 170 | goto end;
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| 171 | }
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| 172 |
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| 173 | BIO_printf(bio_err, "read EC key\n");
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| 174 |
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| 175 | if (pubin)
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| 176 | eckey = load_pubkey(infile, informat, 1, passin, e, "public key");
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| 177 | else
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| 178 | eckey = load_key(infile, informat, 1, passin, e, "private key");
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| 179 |
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| 180 | if (eckey == NULL) {
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| 181 | BIO_printf(bio_err, "unable to load Key\n");
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| 182 | goto end;
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| 183 | }
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| 184 |
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| 185 | out = bio_open_owner(outfile, outformat, private);
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| 186 | if (out == NULL)
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| 187 | goto end;
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| 188 |
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| 189 | if (point_format
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| 190 | && !EVP_PKEY_set_utf8_string_param(
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| 191 | eckey, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
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| 192 | point_format)) {
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| 193 | BIO_printf(bio_err, "unable to set point conversion format\n");
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| 194 | goto end;
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| 195 | }
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| 196 |
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| 197 | if (asn1_encoding != NULL
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| 198 | && !EVP_PKEY_set_utf8_string_param(
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| 199 | eckey, OSSL_PKEY_PARAM_EC_ENCODING, asn1_encoding)) {
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| 200 | BIO_printf(bio_err, "unable to set asn1 encoding format\n");
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| 201 | goto end;
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| 202 | }
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| 203 |
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| 204 | if (no_public) {
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| 205 | if (!EVP_PKEY_set_int_param(eckey, OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, 0)) {
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| 206 | BIO_printf(bio_err, "unable to disable public key encoding\n");
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| 207 | goto end;
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| 208 | }
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| 209 | } else {
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| 210 | if (!EVP_PKEY_set_int_param(eckey, OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, 1)) {
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| 211 | BIO_printf(bio_err, "unable to enable public key encoding\n");
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| 212 | goto end;
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| 213 | }
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| 214 | }
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| 215 |
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| 216 | if (text) {
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| 217 | assert(pubin || private);
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| 218 | if ((pubin && EVP_PKEY_print_public(out, eckey, 0, NULL) <= 0)
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| 219 | || (!pubin && EVP_PKEY_print_private(out, eckey, 0, NULL) <= 0)) {
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| 220 | BIO_printf(bio_err, "unable to print EC key\n");
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| 221 | goto end;
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| 222 | }
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| 223 | }
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| 224 |
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| 225 | if (check) {
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| 226 | pctx = EVP_PKEY_CTX_new_from_pkey(NULL, eckey, NULL);
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| 227 | if (pctx == NULL) {
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| 228 | BIO_printf(bio_err, "unable to check EC key\n");
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| 229 | goto end;
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| 230 | }
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| 231 | if (EVP_PKEY_check(pctx) <= 0)
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| 232 | BIO_printf(bio_err, "EC Key Invalid!\n");
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| 233 | else
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| 234 | BIO_printf(bio_err, "EC Key valid.\n");
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| 235 | ERR_print_errors(bio_err);
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| 236 | }
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| 237 |
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| 238 | if (!noout) {
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| 239 | int selection;
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| 240 | const char *output_type = outformat == FORMAT_ASN1 ? "DER" : "PEM";
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| 241 | const char *output_structure = "type-specific";
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| 242 |
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| 243 | BIO_printf(bio_err, "writing EC key\n");
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| 244 | if (param_out) {
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| 245 | selection = OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
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| 246 | } else if (pubin || pubout) {
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| 247 | selection = OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS
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| 248 | | OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
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| 249 | output_structure = "SubjectPublicKeyInfo";
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| 250 | } else {
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| 251 | selection = OSSL_KEYMGMT_SELECT_ALL;
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| 252 | assert(private);
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| 253 | }
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| 254 |
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| 255 | ectx = OSSL_ENCODER_CTX_new_for_pkey(eckey, selection,
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| 256 | output_type, output_structure,
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| 257 | NULL);
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| 258 | if (enc != NULL) {
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| 259 | OSSL_ENCODER_CTX_set_cipher(ectx, EVP_CIPHER_get0_name(enc), NULL);
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| 260 | /* Default passphrase prompter */
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| 261 | OSSL_ENCODER_CTX_set_passphrase_ui(ectx, get_ui_method(), NULL);
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| 262 | if (passout != NULL)
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| 263 | /* When passout given, override the passphrase prompter */
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| 264 | OSSL_ENCODER_CTX_set_passphrase(ectx,
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| 265 | (const unsigned char *)passout,
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| 266 | strlen(passout));
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| 267 | }
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| 268 | if (!OSSL_ENCODER_to_bio(ectx, out)) {
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| 269 | BIO_printf(bio_err, "unable to write EC key\n");
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| 270 | goto end;
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| 271 | }
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| 272 | }
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| 273 |
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| 274 | ret = 0;
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| 275 | end:
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| 276 | if (ret != 0)
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| 277 | ERR_print_errors(bio_err);
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| 278 | BIO_free_all(out);
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| 279 | EVP_PKEY_free(eckey);
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| 280 | EVP_CIPHER_free(enc);
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| 281 | OSSL_ENCODER_CTX_free(ectx);
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| 282 | OSSL_DECODER_CTX_free(dctx);
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| 283 | EVP_PKEY_CTX_free(pctx);
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| 284 | release_engine(e);
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| 285 | if (passin != NULL)
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| 286 | OPENSSL_clear_free(passin, strlen(passin));
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| 287 | if (passout != NULL)
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| 288 | OPENSSL_clear_free(passout, strlen(passout));
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| 289 | return ret;
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| 290 | }
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