apps/dsa.c - third_party/openssl - Git at Google

 /*
  * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <openssl/opensslconf.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include "apps.h"
 #include "progs.h"
 #include <openssl/bio.h>
 #include <openssl/err.h>
 #include <openssl/dsa.h>
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 #include <openssl/pem.h>
 #include <openssl/bn.h>
 #include <openssl/encoder.h>
 #include <openssl/core_names.h>
 #include <openssl/core_dispatch.h>

 #ifndef OPENSSL_NO_RC4
 # define DEFAULT_PVK_ENCR_STRENGTH      2
 #else
 # define DEFAULT_PVK_ENCR_STRENGTH      0
 #endif

 typedef enum OPTION_choice {
     OPT_COMMON,
     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
     /* Do not change the order here; see case statements below */
     OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
     OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
     OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT,
     OPT_PROV_ENUM
 } OPTION_CHOICE;

 const OPTIONS dsa_options[] = {
     OPT_SECTION("General"),
     {"help", OPT_HELP, '-', "Display this summary"},
     {"", OPT_CIPHER, '-', "Any supported cipher"},
 #ifndef OPENSSL_NO_RC4
     {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
     {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
     {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
 #endif
 #ifndef OPENSSL_NO_ENGINE
     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
 #endif

     OPT_SECTION("Input"),
     {"in", OPT_IN, 's', "Input key"},
     {"inform", OPT_INFORM, 'f', "Input format (DER/PEM/PVK); has no effect"},
     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},

     OPT_SECTION("Output"),
     {"out", OPT_OUT, '>', "Output file"},
     {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
     {"noout", OPT_NOOUT, '-', "Don't print key out"},
     {"text", OPT_TEXT, '-', "Print the key in text"},
     {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
     {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},

     OPT_PROV_OPTIONS,
     {NULL}
 };

 int dsa_main(int argc, char **argv)
 {
     BIO *out = NULL;
     ENGINE *e = NULL;
     EVP_PKEY *pkey = NULL;
     EVP_CIPHER *enc = NULL;
     char *infile = NULL, *outfile = NULL, *prog;
     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
     OPTION_CHOICE o;
     int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, noout = 0;
     int modulus = 0, pubin = 0, pubout = 0, ret = 1;
     int pvk_encr = DEFAULT_PVK_ENCR_STRENGTH;
     int private = 0;
     const char *output_type = NULL, *ciphername = NULL;
     const char *output_structure = NULL;
     int selection = 0;
     OSSL_ENCODER_CTX *ectx = NULL;

     opt_set_unknown_name("cipher");
     prog = opt_init(argc, argv, dsa_options);
     while ((o = opt_next()) != OPT_EOF) {
         switch (o) {
         case OPT_EOF:
         case OPT_ERR:
  opthelp:
             ret = 0;
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             goto end;
         case OPT_HELP:
             opt_help(dsa_options);
             ret = 0;
             goto end;
         case OPT_INFORM:
             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
                 goto opthelp;
             break;
         case OPT_IN:
             infile = opt_arg();
             break;
         case OPT_OUTFORM:
             if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
                 goto opthelp;
             break;
         case OPT_OUT:
             outfile = opt_arg();
             break;
         case OPT_ENGINE:
             e = setup_engine(opt_arg(), 0);
             break;
         case OPT_PASSIN:
             passinarg = opt_arg();
             break;
         case OPT_PASSOUT:
             passoutarg = opt_arg();
             break;
         case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
         case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
         case OPT_PVK_NONE:      /* pvk_encr:= 0 */
 #ifndef OPENSSL_NO_RC4
             pvk_encr = (o - OPT_PVK_NONE);
 #endif
             break;
         case OPT_NOOUT:
             noout = 1;
             break;
         case OPT_TEXT:
             text = 1;
             break;
         case OPT_MODULUS:
             modulus = 1;
             break;
         case OPT_PUBIN:
             pubin = 1;
             break;
         case OPT_PUBOUT:
             pubout = 1;
             break;
         case OPT_CIPHER:
             ciphername = opt_unknown();
             break;
         case OPT_PROV_CASES:
             if (!opt_provider(o))
                 goto end;
             break;
         }
     }

     /* No extra args. */
     if (!opt_check_rest_arg(NULL))
         goto opthelp;

     if (!opt_cipher(ciphername, &enc))
         goto end;
     private = pubin || pubout ? 0 : 1;
     if (text && !pubin)
         private = 1;

     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
         BIO_printf(bio_err, "Error getting passwords\n");
         goto end;
     }

     BIO_printf(bio_err, "read DSA key\n");
     if (pubin)
         pkey = load_pubkey(infile, informat, 1, passin, e, "public key");
     else
         pkey = load_key(infile, informat, 1, passin, e, "private key");

     if (pkey == NULL) {
         BIO_printf(bio_err, "unable to load Key\n");
         ERR_print_errors(bio_err);
         goto end;
     }
     if (!EVP_PKEY_is_a(pkey, "DSA")) {
         BIO_printf(bio_err, "Not a DSA key\n");
         goto end;
     }

     out = bio_open_owner(outfile, outformat, private);
     if (out == NULL)
         goto end;

     if (text) {
         assert(pubin || private);
         if ((pubin && EVP_PKEY_print_public(out, pkey, 0, NULL) <= 0)
             || (!pubin && EVP_PKEY_print_private(out, pkey, 0, NULL) <= 0)) {
             perror(outfile);
             ERR_print_errors(bio_err);
             goto end;
         }
     }

     if (modulus) {
         BIGNUM *pub_key = NULL;

         if (!EVP_PKEY_get_bn_param(pkey, "pub", &pub_key)) {
             ERR_print_errors(bio_err);
             goto end;
         }
         BIO_printf(out, "Public Key=");
         BN_print(out, pub_key);
         BIO_printf(out, "\n");
         BN_free(pub_key);
     }

     if (noout) {
         ret = 0;
         goto end;
     }
     BIO_printf(bio_err, "writing DSA key\n");
     if (outformat == FORMAT_ASN1) {
         output_type = "DER";
     } else if (outformat == FORMAT_PEM) {
         output_type = "PEM";
     } else if (outformat == FORMAT_MSBLOB) {
         output_type = "MSBLOB";
     } else if (outformat == FORMAT_PVK) {
         if (pubin) {
             BIO_printf(bio_err, "PVK form impossible with public key input\n");
             goto end;
         }
         output_type = "PVK";
     } else {
         BIO_printf(bio_err, "bad output format specified for outfile\n");
         goto end;
     }

     if (outformat == FORMAT_ASN1 || outformat == FORMAT_PEM) {
         if (pubout || pubin)
             output_structure = "SubjectPublicKeyInfo";
         else
             output_structure = "type-specific";
     }

     /* Select what you want in the output */
     if (pubout || pubin) {
         selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
     } else {
         assert(private);
         selection = (OSSL_KEYMGMT_SELECT_KEYPAIR
                      | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
     }

     /* Perform the encoding */
     ectx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection, output_type,
                                          output_structure, NULL);
     if (OSSL_ENCODER_CTX_get_num_encoders(ectx) == 0) {
         BIO_printf(bio_err, "%s format not supported\n", output_type);
         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 requires a bit more */
     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");
         goto end;
     }
     ret = 0;
  end:
     if (ret != 0)
         ERR_print_errors(bio_err);
     OSSL_ENCODER_CTX_free(ectx);
     BIO_free_all(out);
     EVP_PKEY_free(pkey);
     EVP_CIPHER_free(enc);
     release_engine(e);
     OPENSSL_free(passin);
     OPENSSL_free(passout);
     return ret;
 }
	/*
	* Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <openssl/opensslconf.h>

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <time.h>
	#include "apps.h"
	#include "progs.h"
	#include <openssl/bio.h>
	#include <openssl/err.h>
	#include <openssl/dsa.h>
	#include <openssl/evp.h>
	#include <openssl/x509.h>
	#include <openssl/pem.h>
	#include <openssl/bn.h>
	#include <openssl/encoder.h>
	#include <openssl/core_names.h>
	#include <openssl/core_dispatch.h>

	#ifndef OPENSSL_NO_RC4
	# define DEFAULT_PVK_ENCR_STRENGTH 2
	#else
	# define DEFAULT_PVK_ENCR_STRENGTH 0
	#endif

	typedef enum OPTION_choice {
	OPT_COMMON,
	OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
	/* Do not change the order here; see case statements below */
	OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
	OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
	OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT,
	OPT_PROV_ENUM
	} OPTION_CHOICE;

	const OPTIONS dsa_options[] = {
	OPT_SECTION("General"),
	{"help", OPT_HELP, '-', "Display this summary"},
	{"", OPT_CIPHER, '-', "Any supported cipher"},
	#ifndef OPENSSL_NO_RC4
	{"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
	{"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
	{"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
	#endif
	#ifndef OPENSSL_NO_ENGINE
	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
	#endif

	OPT_SECTION("Input"),
	{"in", OPT_IN, 's', "Input key"},
	{"inform", OPT_INFORM, 'f', "Input format (DER/PEM/PVK); has no effect"},
	{"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
	{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},

	OPT_SECTION("Output"),
	{"out", OPT_OUT, '>', "Output file"},
	{"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
	{"noout", OPT_NOOUT, '-', "Don't print key out"},
	{"text", OPT_TEXT, '-', "Print the key in text"},
	{"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
	{"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
	{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},

	OPT_PROV_OPTIONS,
	{NULL}
	};

	int dsa_main(int argc, char **argv)
	{
	BIO *out = NULL;
	ENGINE *e = NULL;
	EVP_PKEY *pkey = NULL;
	EVP_CIPHER *enc = NULL;
	char infile = NULL, outfile = NULL, *prog;
	char passin = NULL, passout = NULL, passinarg = NULL, passoutarg = NULL;
	OPTION_CHOICE o;
	int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, noout = 0;
	int modulus = 0, pubin = 0, pubout = 0, ret = 1;
	int pvk_encr = DEFAULT_PVK_ENCR_STRENGTH;
	int private = 0;
	const char output_type = NULL, ciphername = NULL;
	const char *output_structure = NULL;
	int selection = 0;
	OSSL_ENCODER_CTX *ectx = NULL;

	opt_set_unknown_name("cipher");
	prog = opt_init(argc, argv, dsa_options);
	while ((o = opt_next()) != OPT_EOF) {
	switch (o) {
	case OPT_EOF:
	case OPT_ERR:
	opthelp:
	ret = 0;
	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	goto end;
	case OPT_HELP:
	opt_help(dsa_options);
	ret = 0;
	goto end;
	case OPT_INFORM:
	if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
	goto opthelp;
	break;
	case OPT_IN:
	infile = opt_arg();
	break;
	case OPT_OUTFORM:
	if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
	goto opthelp;
	break;
	case OPT_OUT:
	outfile = opt_arg();
	break;
	case OPT_ENGINE:
	e = setup_engine(opt_arg(), 0);
	break;
	case OPT_PASSIN:
	passinarg = opt_arg();
	break;
	case OPT_PASSOUT:
	passoutarg = opt_arg();
	break;
	case OPT_PVK_STRONG: /* pvk_encr:= 2 */
	case OPT_PVK_WEAK: /* pvk_encr:= 1 */
	case OPT_PVK_NONE: /* pvk_encr:= 0 */
	#ifndef OPENSSL_NO_RC4
	pvk_encr = (o - OPT_PVK_NONE);
	#endif
	break;
	case OPT_NOOUT:
	noout = 1;
	break;
	case OPT_TEXT:
	text = 1;
	break;
	case OPT_MODULUS:
	modulus = 1;
	break;
	case OPT_PUBIN:
	pubin = 1;
	break;
	case OPT_PUBOUT:
	pubout = 1;
	break;
	case OPT_CIPHER:
	ciphername = opt_unknown();
	break;
	case OPT_PROV_CASES:
	if (!opt_provider(o))
	goto end;
	break;
	}
	}

	/* No extra args. */
	if (!opt_check_rest_arg(NULL))
	goto opthelp;

	if (!opt_cipher(ciphername, &enc))
	goto end;
	private = pubin \|\| pubout ? 0 : 1;
	if (text && !pubin)
	private = 1;

	if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
	BIO_printf(bio_err, "Error getting passwords\n");
	goto end;
	}

	BIO_printf(bio_err, "read DSA key\n");
	if (pubin)
	pkey = load_pubkey(infile, informat, 1, passin, e, "public key");
	else
	pkey = load_key(infile, informat, 1, passin, e, "private key");

	if (pkey == NULL) {
	BIO_printf(bio_err, "unable to load Key\n");
	ERR_print_errors(bio_err);
	goto end;
	}
	if (!EVP_PKEY_is_a(pkey, "DSA")) {
	BIO_printf(bio_err, "Not a DSA key\n");
	goto end;
	}

	out = bio_open_owner(outfile, outformat, private);
	if (out == NULL)
	goto end;

	if (text) {
	assert(pubin \|\| private);
	if ((pubin && EVP_PKEY_print_public(out, pkey, 0, NULL) <= 0)
	\|\| (!pubin && EVP_PKEY_print_private(out, pkey, 0, NULL) <= 0)) {
	perror(outfile);
	ERR_print_errors(bio_err);
	goto end;
	}
	}

	if (modulus) {
	BIGNUM *pub_key = NULL;

	if (!EVP_PKEY_get_bn_param(pkey, "pub", &pub_key)) {
	ERR_print_errors(bio_err);
	goto end;
	}
	BIO_printf(out, "Public Key=");
	BN_print(out, pub_key);
	BIO_printf(out, "\n");
	BN_free(pub_key);
	}

	if (noout) {
	ret = 0;
	goto end;
	}
	BIO_printf(bio_err, "writing DSA key\n");
	if (outformat == FORMAT_ASN1) {
	output_type = "DER";
	} else if (outformat == FORMAT_PEM) {
	output_type = "PEM";
	} else if (outformat == FORMAT_MSBLOB) {
	output_type = "MSBLOB";
	} else if (outformat == FORMAT_PVK) {
	if (pubin) {
	BIO_printf(bio_err, "PVK form impossible with public key input\n");
	goto end;
	}
	output_type = "PVK";
	} else {
	BIO_printf(bio_err, "bad output format specified for outfile\n");
	goto end;
	}

	if (outformat == FORMAT_ASN1 \|\| outformat == FORMAT_PEM) {
	if (pubout \|\| pubin)
	output_structure = "SubjectPublicKeyInfo";
	else
	output_structure = "type-specific";
	}

	/* Select what you want in the output */
	if (pubout \|\| pubin) {
	selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
	} else {
	assert(private);
	selection = (OSSL_KEYMGMT_SELECT_KEYPAIR
	\| OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
	}

	/* Perform the encoding */
	ectx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection, output_type,
	output_structure, NULL);
	if (OSSL_ENCODER_CTX_get_num_encoders(ectx) == 0) {
	BIO_printf(bio_err, "%s format not supported\n", output_type);
	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 requires a bit more */
	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");
	goto end;
	}
	ret = 0;
	end:
	if (ret != 0)
	ERR_print_errors(bio_err);
	OSSL_ENCODER_CTX_free(ectx);
	BIO_free_all(out);
	EVP_PKEY_free(pkey);
	EVP_CIPHER_free(enc);
	release_engine(e);
	OPENSSL_free(passin);
	OPENSSL_free(passout);
	return ret;
	}