414 lines
12 KiB
C
414 lines
12 KiB
C
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/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/* Necessary for legacy RSA public key export */
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#define OPENSSL_SUPPRESS_DEPRECATED
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#include <openssl/opensslconf.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "apps.h"
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#include "progs.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/bn.h>
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#include <openssl/encoder.h>
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/*
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* This include is to get OSSL_KEYMGMT_SELECT_*, which feels a bit
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* much just for those macros... they might serve better as EVP macros.
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*/
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#include <openssl/core_dispatch.h>
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#ifndef OPENSSL_NO_RC4
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# define DEFAULT_PVK_ENCR_STRENGTH 2
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#else
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# define DEFAULT_PVK_ENCR_STRENGTH 0
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#endif
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typedef enum OPTION_choice {
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OPT_COMMON,
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OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
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OPT_PUBIN, OPT_PUBOUT, OPT_PASSOUT, OPT_PASSIN,
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OPT_RSAPUBKEY_IN, OPT_RSAPUBKEY_OUT,
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/* Do not change the order here; see case statements below */
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OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
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OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_CHECK, OPT_CIPHER,
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OPT_PROV_ENUM, OPT_TRADITIONAL
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} OPTION_CHOICE;
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const OPTIONS rsa_options[] = {
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OPT_SECTION("General"),
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{"help", OPT_HELP, '-', "Display this summary"},
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{"check", OPT_CHECK, '-', "Verify key consistency"},
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{"", OPT_CIPHER, '-', "Any supported cipher"},
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#ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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#endif
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OPT_SECTION("Input"),
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{"in", OPT_IN, 's', "Input file"},
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{"inform", OPT_INFORM, 'f', "Input format (DER/PEM/P12/ENGINE)"},
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{"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
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{"RSAPublicKey_in", OPT_RSAPUBKEY_IN, '-', "Input is an RSAPublicKey"},
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{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
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OPT_SECTION("Output"),
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{"out", OPT_OUT, '>', "Output file"},
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{"outform", OPT_OUTFORM, 'f', "Output format, one of DER PEM PVK"},
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{"pubout", OPT_PUBOUT, '-', "Output a public key"},
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{"RSAPublicKey_out", OPT_RSAPUBKEY_OUT, '-', "Output is an RSAPublicKey"},
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{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
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{"noout", OPT_NOOUT, '-', "Don't print key out"},
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{"text", OPT_TEXT, '-', "Print the key in text"},
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{"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
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{"traditional", OPT_TRADITIONAL, '-',
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"Use traditional format for private keys"},
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#ifndef OPENSSL_NO_RC4
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OPT_SECTION("PVK"),
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{"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
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{"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
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{"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
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#endif
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OPT_PROV_OPTIONS,
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{NULL}
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};
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static int try_legacy_encoding(EVP_PKEY *pkey, int outformat, int pubout,
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BIO *out)
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{
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int ret = 0;
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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const RSA *rsa = EVP_PKEY_get0_RSA(pkey);
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if (rsa == NULL)
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return 0;
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if (outformat == FORMAT_ASN1) {
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if (pubout == 2)
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ret = i2d_RSAPublicKey_bio(out, rsa) > 0;
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else
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ret = i2d_RSA_PUBKEY_bio(out, rsa) > 0;
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} else if (outformat == FORMAT_PEM) {
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if (pubout == 2)
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ret = PEM_write_bio_RSAPublicKey(out, rsa) > 0;
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else
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ret = PEM_write_bio_RSA_PUBKEY(out, rsa) > 0;
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# ifndef OPENSSL_NO_DSA
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} else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
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ret = i2b_PublicKey_bio(out, pkey) > 0;
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# endif
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}
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#endif
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return ret;
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}
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int rsa_main(int argc, char **argv)
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{
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ENGINE *e = NULL;
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BIO *out = NULL;
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EVP_PKEY *pkey = NULL;
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EVP_PKEY_CTX *pctx;
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EVP_CIPHER *enc = NULL;
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char *infile = NULL, *outfile = NULL, *ciphername = NULL, *prog;
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char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
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int private = 0;
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int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, check = 0;
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int noout = 0, modulus = 0, pubin = 0, pubout = 0, ret = 1;
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int pvk_encr = DEFAULT_PVK_ENCR_STRENGTH;
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OPTION_CHOICE o;
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int traditional = 0;
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const char *output_type = NULL;
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const char *output_structure = NULL;
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int selection = 0;
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OSSL_ENCODER_CTX *ectx = NULL;
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opt_set_unknown_name("cipher");
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prog = opt_init(argc, argv, rsa_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(rsa_options);
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ret = 0;
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goto end;
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case OPT_INFORM:
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if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
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goto opthelp;
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break;
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case OPT_IN:
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infile = opt_arg();
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break;
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case OPT_OUTFORM:
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if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
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goto opthelp;
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break;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_PASSIN:
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passinarg = opt_arg();
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break;
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case OPT_PASSOUT:
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passoutarg = opt_arg();
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break;
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case OPT_ENGINE:
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e = setup_engine(opt_arg(), 0);
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break;
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case OPT_PUBIN:
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pubin = 1;
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break;
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case OPT_PUBOUT:
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pubout = 1;
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break;
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case OPT_RSAPUBKEY_IN:
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pubin = 2;
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break;
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case OPT_RSAPUBKEY_OUT:
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pubout = 2;
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break;
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case OPT_PVK_STRONG: /* pvk_encr:= 2 */
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case OPT_PVK_WEAK: /* pvk_encr:= 1 */
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case OPT_PVK_NONE: /* pvk_encr:= 0 */
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pvk_encr = (o - OPT_PVK_NONE);
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break;
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case OPT_NOOUT:
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noout = 1;
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break;
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case OPT_TEXT:
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text = 1;
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break;
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case OPT_MODULUS:
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modulus = 1;
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break;
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case OPT_CHECK:
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check = 1;
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break;
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case OPT_CIPHER:
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ciphername = opt_unknown();
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break;
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case OPT_PROV_CASES:
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if (!opt_provider(o))
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goto end;
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break;
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case OPT_TRADITIONAL:
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traditional = 1;
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break;
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}
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}
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/* No extra arguments. */
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if (!opt_check_rest_arg(NULL))
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goto opthelp;
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if (!opt_cipher(ciphername, &enc))
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goto opthelp;
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private = (text && !pubin) || (!pubout && !noout);
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if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
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BIO_printf(bio_err, "Error getting passwords\n");
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goto end;
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}
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if (check && pubin) {
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BIO_printf(bio_err, "Only private keys can be checked\n");
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goto end;
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}
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if (pubin) {
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int tmpformat = FORMAT_UNDEF;
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if (pubin == 2) {
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if (informat == FORMAT_PEM)
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tmpformat = FORMAT_PEMRSA;
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else if (informat == FORMAT_ASN1)
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tmpformat = FORMAT_ASN1RSA;
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} else {
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tmpformat = informat;
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}
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pkey = load_pubkey(infile, tmpformat, 1, passin, e, "public key");
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} else {
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pkey = load_key(infile, informat, 1, passin, e, "private key");
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}
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if (pkey == NULL) {
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ERR_print_errors(bio_err);
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goto end;
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}
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if (!EVP_PKEY_is_a(pkey, "RSA") && !EVP_PKEY_is_a(pkey, "RSA-PSS")) {
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BIO_printf(bio_err, "Not an RSA key\n");
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goto end;
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}
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out = bio_open_owner(outfile, outformat, private);
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if (out == NULL)
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goto end;
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if (text) {
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assert(pubin || private);
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if ((pubin && EVP_PKEY_print_public(out, pkey, 0, NULL) <= 0)
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|| (!pubin && EVP_PKEY_print_private(out, pkey, 0, NULL) <= 0)) {
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perror(outfile);
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ERR_print_errors(bio_err);
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goto end;
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}
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}
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if (modulus) {
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BIGNUM *n = NULL;
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/* Every RSA key has an 'n' */
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EVP_PKEY_get_bn_param(pkey, "n", &n);
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BIO_printf(out, "Modulus=");
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BN_print(out, n);
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BIO_printf(out, "\n");
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BN_free(n);
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}
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if (check) {
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int r;
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pctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL);
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if (pctx == NULL) {
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BIO_printf(bio_err, "RSA unable to create PKEY context\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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r = EVP_PKEY_check(pctx);
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EVP_PKEY_CTX_free(pctx);
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if (r == 1) {
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BIO_printf(out, "RSA key ok\n");
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} else if (r == 0) {
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BIO_printf(bio_err, "RSA key not ok\n");
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ERR_print_errors(bio_err);
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} else if (r < 0) {
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ERR_print_errors(bio_err);
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goto end;
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}
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}
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if (noout) {
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ret = 0;
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goto end;
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}
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BIO_printf(bio_err, "writing RSA key\n");
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/* Choose output type for the format */
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if (outformat == FORMAT_ASN1) {
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output_type = "DER";
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} else if (outformat == FORMAT_PEM) {
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output_type = "PEM";
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} else if (outformat == FORMAT_MSBLOB) {
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output_type = "MSBLOB";
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} else if (outformat == FORMAT_PVK) {
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if (pubin) {
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BIO_printf(bio_err, "PVK form impossible with public key input\n");
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goto end;
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}
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output_type = "PVK";
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} else {
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BIO_printf(bio_err, "bad output format specified for outfile\n");
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goto end;
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}
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/* Select what you want in the output */
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if (pubout || pubin) {
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selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
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} else {
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assert(private);
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selection = (OSSL_KEYMGMT_SELECT_KEYPAIR
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| OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
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}
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/* For DER based output, select the desired output structure */
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if (outformat == FORMAT_ASN1 || outformat == FORMAT_PEM) {
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if (pubout || pubin) {
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if (pubout == 2)
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output_structure = "pkcs1"; /* "type-specific" would work too */
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else
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output_structure = "SubjectPublicKeyInfo";
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} else {
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assert(private);
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if (traditional)
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output_structure = "pkcs1"; /* "type-specific" would work too */
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else
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output_structure = "PrivateKeyInfo";
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}
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}
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/* Now, perform the encoding */
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ectx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection,
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output_type, output_structure,
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NULL);
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if (OSSL_ENCODER_CTX_get_num_encoders(ectx) == 0) {
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|
|
if ((!pubout && !pubin)
|
||
|
|
|| !try_legacy_encoding(pkey, outformat, pubout, out))
|
||
|
|
BIO_printf(bio_err, "%s format not supported\n", output_type);
|
||
|
|
else
|
||
|
|
ret = 0;
|
||
|
|
goto end;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Passphrase setup */
|
||
|
|
if (enc != NULL)
|
||
|
|
OSSL_ENCODER_CTX_set_cipher(ectx, EVP_CIPHER_get0_name(enc), NULL);
|
||
|
|
|
||
|
|
/* Default passphrase prompter */
|
||
|
|
if (enc != NULL || outformat == FORMAT_PVK) {
|
||
|
|
OSSL_ENCODER_CTX_set_passphrase_ui(ectx, get_ui_method(), NULL);
|
||
|
|
if (passout != NULL)
|
||
|
|
/* When passout given, override the passphrase prompter */
|
||
|
|
OSSL_ENCODER_CTX_set_passphrase(ectx,
|
||
|
|
(const unsigned char *)passout,
|
||
|
|
strlen(passout));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* PVK is a bit special... */
|
||
|
|
if (outformat == FORMAT_PVK) {
|
||
|
|
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
|
||
|
|
|
||
|
|
params[0] = OSSL_PARAM_construct_int("encrypt-level", &pvk_encr);
|
||
|
|
if (!OSSL_ENCODER_CTX_set_params(ectx, params)) {
|
||
|
|
BIO_printf(bio_err, "invalid PVK encryption level\n");
|
||
|
|
goto end;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!OSSL_ENCODER_to_bio(ectx, out)) {
|
||
|
|
BIO_printf(bio_err, "unable to write key\n");
|
||
|
|
ERR_print_errors(bio_err);
|
||
|
|
goto end;
|
||
|
|
}
|
||
|
|
ret = 0;
|
||
|
|
end:
|
||
|
|
OSSL_ENCODER_CTX_free(ectx);
|
||
|
|
release_engine(e);
|
||
|
|
BIO_free_all(out);
|
||
|
|
EVP_PKEY_free(pkey);
|
||
|
|
EVP_CIPHER_free(enc);
|
||
|
|
OPENSSL_free(passin);
|
||
|
|
OPENSSL_free(passout);
|
||
|
|
return ret;
|
||
|
|
}
|