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

 /*
  * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (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 "apps.h"
 #include <string.h>
 #include <openssl/err.h>
 #include <openssl/pem.h>
 #include <openssl/evp.h>

 #define KEY_NONE        0
 #define KEY_PRIVKEY     1
 #define KEY_PUBKEY      2
 #define KEY_CERT        3

 static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
                               const char *keyfile, int keyform, int key_type,
                               char *passinarg, int pkey_op, ENGINE *e,
                               const int impl);

 static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
                       ENGINE *e);

 static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
                     unsigned char *out, size_t *poutlen,
                     unsigned char *in, size_t inlen);

 typedef enum OPTION_choice {
     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
     OPT_ENGINE, OPT_ENGINE_IMPL, OPT_IN, OPT_OUT,
     OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN,
     OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
     OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN,
     OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT, OPT_KDF, OPT_KDFLEN
 } OPTION_CHOICE;

 OPTIONS pkeyutl_options[] = {
     {"help", OPT_HELP, '-', "Display this summary"},
     {"in", OPT_IN, '<', "Input file - default stdin"},
     {"out", OPT_OUT, '>', "Output file - default stdout"},
     {"pubin", OPT_PUBIN, '-', "Input is a public key"},
     {"certin", OPT_CERTIN, '-', "Input is a cert with a public key"},
     {"asn1parse", OPT_ASN1PARSE, '-', "asn1parse the output data"},
     {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
     {"sign", OPT_SIGN, '-', "Sign input data with private key"},
     {"verify", OPT_VERIFY, '-', "Verify with public key"},
     {"verifyrecover", OPT_VERIFYRECOVER, '-',
      "Verify with public key, recover original data"},
     {"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
     {"encrypt", OPT_ENCRYPT, '-', "Encrypt input data with public key"},
     {"decrypt", OPT_DECRYPT, '-', "Decrypt input data with private key"},
     {"derive", OPT_DERIVE, '-', "Derive shared secret"},
     {"kdf", OPT_KDF, 's', "Use KDF algorithm"},
     {"kdflen", OPT_KDFLEN, 'p', "KDF algorithm output length"},
     {"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"},
     {"inkey", OPT_INKEY, 's', "Input private key file"},
     {"peerkey", OPT_PEERKEY, 's', "Peer key file used in key derivation"},
     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
     {"peerform", OPT_PEERFORM, 'E', "Peer key format - default PEM"},
     {"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"},
     {"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
 #ifndef OPENSSL_NO_ENGINE
     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
     {"engine_impl", OPT_ENGINE_IMPL, '-',
      "Also use engine given by -engine for crypto operations"},
 #endif
     {NULL}
 };

 int pkeyutl_main(int argc, char **argv)
 {
     BIO *in = NULL, *out = NULL;
     ENGINE *e = NULL;
     EVP_PKEY_CTX *ctx = NULL;
     char *infile = NULL, *outfile = NULL, *sigfile = NULL, *passinarg = NULL;
     char hexdump = 0, asn1parse = 0, rev = 0, *prog;
     unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL;
     OPTION_CHOICE o;
     int buf_inlen = 0, siglen = -1, keyform = FORMAT_PEM, peerform =
         FORMAT_PEM;
     int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
     int engine_impl = 0;
     int ret = 1, rv = -1;
     size_t buf_outlen;
     const char *inkey = NULL;
     const char *peerkey = NULL;
     const char *kdfalg = NULL;
     int kdflen = 0;
     STACK_OF(OPENSSL_STRING) *pkeyopts = NULL;

     prog = opt_init(argc, argv, pkeyutl_options);
     while ((o = opt_next()) != OPT_EOF) {
         switch (o) {
         case OPT_EOF:
         case OPT_ERR:
  opthelp:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             goto end;
         case OPT_HELP:
             opt_help(pkeyutl_options);
             ret = 0;
             goto end;
         case OPT_IN:
             infile = opt_arg();
             break;
         case OPT_OUT:
             outfile = opt_arg();
             break;
         case OPT_SIGFILE:
             sigfile = opt_arg();
             break;
         case OPT_ENGINE_IMPL:
             engine_impl = 1;
             break;
         case OPT_INKEY:
             inkey = opt_arg();
             break;
         case OPT_PEERKEY:
             peerkey = opt_arg();
             break;
         case OPT_PASSIN:
             passinarg = opt_arg();
             break;
         case OPT_PEERFORM:
             if (!opt_format(opt_arg(), OPT_FMT_PDE, &peerform))
                 goto opthelp;
             break;
         case OPT_KEYFORM:
             if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyform))
                 goto opthelp;
             break;
         case OPT_ENGINE:
             e = setup_engine(opt_arg(), 0);
             break;
         case OPT_PUBIN:
             key_type = KEY_PUBKEY;
             break;
         case OPT_CERTIN:
             key_type = KEY_CERT;
             break;
         case OPT_ASN1PARSE:
             asn1parse = 1;
             break;
         case OPT_HEXDUMP:
             hexdump = 1;
             break;
         case OPT_SIGN:
             pkey_op = EVP_PKEY_OP_SIGN;
             break;
         case OPT_VERIFY:
             pkey_op = EVP_PKEY_OP_VERIFY;
             break;
         case OPT_VERIFYRECOVER:
             pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
             break;
         case OPT_ENCRYPT:
             pkey_op = EVP_PKEY_OP_ENCRYPT;
             break;
         case OPT_DECRYPT:
             pkey_op = EVP_PKEY_OP_DECRYPT;
             break;
         case OPT_DERIVE:
             pkey_op = EVP_PKEY_OP_DERIVE;
             break;
         case OPT_KDF:
             pkey_op = EVP_PKEY_OP_DERIVE;
             key_type = KEY_NONE;
             kdfalg = opt_arg();
             break;
         case OPT_KDFLEN:
             kdflen = atoi(opt_arg());
             break;
         case OPT_REV:
             rev = 1;
             break;
         case OPT_PKEYOPT:
             if ((pkeyopts == NULL &&
                  (pkeyopts = sk_OPENSSL_STRING_new_null()) == NULL) ||
                 sk_OPENSSL_STRING_push(pkeyopts, opt_arg()) == 0) {
                 BIO_puts(bio_err, "out of memory\n");
                 goto end;
             }
             break;
         }
     }
     argc = opt_num_rest();
     if (argc != 0)
         goto opthelp;

     if (kdfalg != NULL) {
         if (kdflen == 0)
             goto opthelp;
     } else if ((inkey == NULL)
             || (peerkey != NULL && pkey_op != EVP_PKEY_OP_DERIVE)) {
         goto opthelp;
     }
     ctx = init_ctx(kdfalg, &keysize, inkey, keyform, key_type,
                    passinarg, pkey_op, e, engine_impl);
     if (ctx == NULL) {
         BIO_printf(bio_err, "%s: Error initializing context\n", prog);
         ERR_print_errors(bio_err);
         goto end;
     }
     if (peerkey != NULL && !setup_peer(ctx, peerform, peerkey, e)) {
         BIO_printf(bio_err, "%s: Error setting up peer key\n", prog);
         ERR_print_errors(bio_err);
         goto end;
     }
     if (pkeyopts != NULL) {
         int num = sk_OPENSSL_STRING_num(pkeyopts);
         int i;

         for (i = 0; i < num; ++i) {
             const char *opt = sk_OPENSSL_STRING_value(pkeyopts, i);

             if (pkey_ctrl_string(ctx, opt) <= 0) {
                 BIO_printf(bio_err, "%s: Can't set parameter:\n", prog);
                 ERR_print_errors(bio_err);
                 goto end;
             }
         }
     }

     if (sigfile && (pkey_op != EVP_PKEY_OP_VERIFY)) {
         BIO_printf(bio_err,
                    "%s: Signature file specified for non verify\n", prog);
         goto end;
     }

     if (!sigfile && (pkey_op == EVP_PKEY_OP_VERIFY)) {
         BIO_printf(bio_err,
                    "%s: No signature file specified for verify\n", prog);
         goto end;
     }

 /* FIXME: seed PRNG only if needed */
     app_RAND_load_file(NULL, 0);

     if (pkey_op != EVP_PKEY_OP_DERIVE) {
         in = bio_open_default(infile, 'r', FORMAT_BINARY);
         if (in == NULL)
             goto end;
     }
     out = bio_open_default(outfile, 'w', FORMAT_BINARY);
     if (out == NULL)
         goto end;

     if (sigfile) {
         BIO *sigbio = BIO_new_file(sigfile, "rb");
         if (!sigbio) {
             BIO_printf(bio_err, "Can't open signature file %s\n", sigfile);
             goto end;
         }
         siglen = bio_to_mem(&sig, keysize * 10, sigbio);
         BIO_free(sigbio);
         if (siglen < 0) {
             BIO_printf(bio_err, "Error reading signature data\n");
             goto end;
         }
     }

     if (in) {
         /* Read the input data */
         buf_inlen = bio_to_mem(&buf_in, keysize * 10, in);
         if (buf_inlen < 0) {
             BIO_printf(bio_err, "Error reading input Data\n");
             exit(1);
         }
         if (rev) {
             size_t i;
             unsigned char ctmp;
             size_t l = (size_t)buf_inlen;
             for (i = 0; i < l / 2; i++) {
                 ctmp = buf_in[i];
                 buf_in[i] = buf_in[l - 1 - i];
                 buf_in[l - 1 - i] = ctmp;
             }
         }
     }

     if (pkey_op == EVP_PKEY_OP_VERIFY) {
         rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
                              buf_in, (size_t)buf_inlen);
         if (rv == 1) {
             BIO_puts(out, "Signature Verified Successfully\n");
             ret = 0;
         } else
             BIO_puts(out, "Signature Verification Failure\n");
         goto end;
     }
     if (kdflen != 0) {
         buf_outlen = kdflen;
         rv = 1;
     } else {
         rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
                       buf_in, (size_t)buf_inlen);
     }
     if (rv > 0 && buf_outlen != 0) {
         buf_out = app_malloc(buf_outlen, "buffer output");
         rv = do_keyop(ctx, pkey_op,
                       buf_out, (size_t *)&buf_outlen,
                       buf_in, (size_t)buf_inlen);
     }
     if (rv <= 0) {
         BIO_puts(bio_err, "Public Key operation error\n");
         ERR_print_errors(bio_err);
         goto end;
     }
     ret = 0;

     if (asn1parse) {
         if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
             ERR_print_errors(bio_err);
     } else if (hexdump)
         BIO_dump(out, (char *)buf_out, buf_outlen);
     else
         BIO_write(out, buf_out, buf_outlen);

  end:
     EVP_PKEY_CTX_free(ctx);
     BIO_free(in);
     BIO_free_all(out);
     OPENSSL_free(buf_in);
     OPENSSL_free(buf_out);
     OPENSSL_free(sig);
     sk_OPENSSL_STRING_free(pkeyopts);
     return ret;
 }

 static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
                               const char *keyfile, int keyform, int key_type,
                               char *passinarg, int pkey_op, ENGINE *e,
                               const int engine_impl)
 {
     EVP_PKEY *pkey = NULL;
     EVP_PKEY_CTX *ctx = NULL;
     ENGINE *impl = NULL;
     char *passin = NULL;
     int rv = -1;
     X509 *x;
     if (((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT)
          || (pkey_op == EVP_PKEY_OP_DERIVE))
         && (key_type != KEY_PRIVKEY && kdfalg == NULL)) {
         BIO_printf(bio_err, "A private key is needed for this operation\n");
         goto end;
     }
     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
         BIO_printf(bio_err, "Error getting password\n");
         goto end;
     }
     switch (key_type) {
     case KEY_PRIVKEY:
         pkey = load_key(keyfile, keyform, 0, passin, e, "Private Key");
         break;

     case KEY_PUBKEY:
         pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "Public Key");
         break;

     case KEY_CERT:
         x = load_cert(keyfile, keyform, "Certificate");
         if (x) {
             pkey = X509_get_pubkey(x);
             X509_free(x);
         }
         break;

     case KEY_NONE:
         break;

     }

 #ifndef OPENSSL_NO_ENGINE
     if (engine_impl)
         impl = e;
 #endif

     if (kdfalg) {
         int kdfnid = OBJ_sn2nid(kdfalg);
         if (kdfnid == NID_undef)
             goto end;
         ctx = EVP_PKEY_CTX_new_id(kdfnid, impl);
     } else {
         if (pkey == NULL)
             goto end;
         *pkeysize = EVP_PKEY_size(pkey);
         ctx = EVP_PKEY_CTX_new(pkey, impl);
         EVP_PKEY_free(pkey);
     }

     if (ctx == NULL)
         goto end;

     switch (pkey_op) {
     case EVP_PKEY_OP_SIGN:
         rv = EVP_PKEY_sign_init(ctx);
         break;

     case EVP_PKEY_OP_VERIFY:
         rv = EVP_PKEY_verify_init(ctx);
         break;

     case EVP_PKEY_OP_VERIFYRECOVER:
         rv = EVP_PKEY_verify_recover_init(ctx);
         break;

     case EVP_PKEY_OP_ENCRYPT:
         rv = EVP_PKEY_encrypt_init(ctx);
         break;

     case EVP_PKEY_OP_DECRYPT:
         rv = EVP_PKEY_decrypt_init(ctx);
         break;

     case EVP_PKEY_OP_DERIVE:
         rv = EVP_PKEY_derive_init(ctx);
         break;
     }

     if (rv <= 0) {
         EVP_PKEY_CTX_free(ctx);
         ctx = NULL;
     }

  end:
     OPENSSL_free(passin);
     return ctx;

 }

 static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
                       ENGINE* e)
 {
     EVP_PKEY *peer = NULL;
     ENGINE* engine = NULL;
     int ret;

     if (peerform == FORMAT_ENGINE)
         engine = e;
     peer = load_pubkey(file, peerform, 0, NULL, engine, "Peer Key");
     if (!peer) {
         BIO_printf(bio_err, "Error reading peer key %s\n", file);
         ERR_print_errors(bio_err);
         return 0;
     }

     ret = EVP_PKEY_derive_set_peer(ctx, peer);

     EVP_PKEY_free(peer);
     if (ret <= 0)
         ERR_print_errors(bio_err);
     return ret;
 }

 static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
                     unsigned char *out, size_t *poutlen,
                     unsigned char *in, size_t inlen)
 {
     int rv = 0;
     switch (pkey_op) {
     case EVP_PKEY_OP_VERIFYRECOVER:
         rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
         break;

     case EVP_PKEY_OP_SIGN:
         rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
         break;

     case EVP_PKEY_OP_ENCRYPT:
         rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
         break;

     case EVP_PKEY_OP_DECRYPT:
         rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
         break;

     case EVP_PKEY_OP_DERIVE:
         rv = EVP_PKEY_derive(ctx, out, poutlen);
         break;

     }
     return rv;
 }
	/*
	* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the OpenSSL license (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 "apps.h"
	#include <string.h>
	#include <openssl/err.h>
	#include <openssl/pem.h>
	#include <openssl/evp.h>

	#define KEY_NONE 0
	#define KEY_PRIVKEY 1
	#define KEY_PUBKEY 2
	#define KEY_CERT 3

	static EVP_PKEY_CTX init_ctx(const char kdfalg, int *pkeysize,
	const char *keyfile, int keyform, int key_type,
	char passinarg, int pkey_op, ENGINE e,
	const int impl);

	static int setup_peer(EVP_PKEY_CTX ctx, int peerform, const char file,
	ENGINE *e);

	static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
	unsigned char out, size_t poutlen,
	unsigned char *in, size_t inlen);

	typedef enum OPTION_choice {
	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	OPT_ENGINE, OPT_ENGINE_IMPL, OPT_IN, OPT_OUT,
	OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN,
	OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
	OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN,
	OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT, OPT_KDF, OPT_KDFLEN
	} OPTION_CHOICE;

	OPTIONS pkeyutl_options[] = {
	{"help", OPT_HELP, '-', "Display this summary"},
	{"in", OPT_IN, '<', "Input file - default stdin"},
	{"out", OPT_OUT, '>', "Output file - default stdout"},
	{"pubin", OPT_PUBIN, '-', "Input is a public key"},
	{"certin", OPT_CERTIN, '-', "Input is a cert with a public key"},
	{"asn1parse", OPT_ASN1PARSE, '-', "asn1parse the output data"},
	{"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
	{"sign", OPT_SIGN, '-', "Sign input data with private key"},
	{"verify", OPT_VERIFY, '-', "Verify with public key"},
	{"verifyrecover", OPT_VERIFYRECOVER, '-',
	"Verify with public key, recover original data"},
	{"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
	{"encrypt", OPT_ENCRYPT, '-', "Encrypt input data with public key"},
	{"decrypt", OPT_DECRYPT, '-', "Decrypt input data with private key"},
	{"derive", OPT_DERIVE, '-', "Derive shared secret"},
	{"kdf", OPT_KDF, 's', "Use KDF algorithm"},
	{"kdflen", OPT_KDFLEN, 'p', "KDF algorithm output length"},
	{"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"},
	{"inkey", OPT_INKEY, 's', "Input private key file"},
	{"peerkey", OPT_PEERKEY, 's', "Peer key file used in key derivation"},
	{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
	{"peerform", OPT_PEERFORM, 'E', "Peer key format - default PEM"},
	{"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"},
	{"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
	#ifndef OPENSSL_NO_ENGINE
	{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
	{"engine_impl", OPT_ENGINE_IMPL, '-',
	"Also use engine given by -engine for crypto operations"},
	#endif
	{NULL}
	};

	int pkeyutl_main(int argc, char **argv)
	{
	BIO in = NULL, out = NULL;
	ENGINE *e = NULL;
	EVP_PKEY_CTX *ctx = NULL;
	char infile = NULL, outfile = NULL, sigfile = NULL, passinarg = NULL;
	char hexdump = 0, asn1parse = 0, rev = 0, *prog;
	unsigned char buf_in = NULL, buf_out = NULL, *sig = NULL;
	OPTION_CHOICE o;
	int buf_inlen = 0, siglen = -1, keyform = FORMAT_PEM, peerform =
	FORMAT_PEM;
	int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
	int engine_impl = 0;
	int ret = 1, rv = -1;
	size_t buf_outlen;
	const char *inkey = NULL;
	const char *peerkey = NULL;
	const char *kdfalg = NULL;
	int kdflen = 0;
	STACK_OF(OPENSSL_STRING) *pkeyopts = NULL;

	prog = opt_init(argc, argv, pkeyutl_options);
	while ((o = opt_next()) != OPT_EOF) {
	switch (o) {
	case OPT_EOF:
	case OPT_ERR:
	opthelp:
	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	goto end;
	case OPT_HELP:
	opt_help(pkeyutl_options);
	ret = 0;
	goto end;
	case OPT_IN:
	infile = opt_arg();
	break;
	case OPT_OUT:
	outfile = opt_arg();
	break;
	case OPT_SIGFILE:
	sigfile = opt_arg();
	break;
	case OPT_ENGINE_IMPL:
	engine_impl = 1;
	break;
	case OPT_INKEY:
	inkey = opt_arg();
	break;
	case OPT_PEERKEY:
	peerkey = opt_arg();
	break;
	case OPT_PASSIN:
	passinarg = opt_arg();
	break;
	case OPT_PEERFORM:
	if (!opt_format(opt_arg(), OPT_FMT_PDE, &peerform))
	goto opthelp;
	break;
	case OPT_KEYFORM:
	if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyform))
	goto opthelp;
	break;
	case OPT_ENGINE:
	e = setup_engine(opt_arg(), 0);
	break;
	case OPT_PUBIN:
	key_type = KEY_PUBKEY;
	break;
	case OPT_CERTIN:
	key_type = KEY_CERT;
	break;
	case OPT_ASN1PARSE:
	asn1parse = 1;
	break;
	case OPT_HEXDUMP:
	hexdump = 1;
	break;
	case OPT_SIGN:
	pkey_op = EVP_PKEY_OP_SIGN;
	break;
	case OPT_VERIFY:
	pkey_op = EVP_PKEY_OP_VERIFY;
	break;
	case OPT_VERIFYRECOVER:
	pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
	break;
	case OPT_ENCRYPT:
	pkey_op = EVP_PKEY_OP_ENCRYPT;
	break;
	case OPT_DECRYPT:
	pkey_op = EVP_PKEY_OP_DECRYPT;
	break;
	case OPT_DERIVE:
	pkey_op = EVP_PKEY_OP_DERIVE;
	break;
	case OPT_KDF:
	pkey_op = EVP_PKEY_OP_DERIVE;
	key_type = KEY_NONE;
	kdfalg = opt_arg();
	break;
	case OPT_KDFLEN:
	kdflen = atoi(opt_arg());
	break;
	case OPT_REV:
	rev = 1;
	break;
	case OPT_PKEYOPT:
	if ((pkeyopts == NULL &&
	(pkeyopts = sk_OPENSSL_STRING_new_null()) == NULL) \|\|
	sk_OPENSSL_STRING_push(pkeyopts, opt_arg()) == 0) {
	BIO_puts(bio_err, "out of memory\n");
	goto end;
	}
	break;
	}
	}
	argc = opt_num_rest();
	if (argc != 0)
	goto opthelp;

	if (kdfalg != NULL) {
	if (kdflen == 0)
	goto opthelp;
	} else if ((inkey == NULL)
	\|\| (peerkey != NULL && pkey_op != EVP_PKEY_OP_DERIVE)) {
	goto opthelp;
	}
	ctx = init_ctx(kdfalg, &keysize, inkey, keyform, key_type,
	passinarg, pkey_op, e, engine_impl);
	if (ctx == NULL) {
	BIO_printf(bio_err, "%s: Error initializing context\n", prog);
	ERR_print_errors(bio_err);
	goto end;
	}
	if (peerkey != NULL && !setup_peer(ctx, peerform, peerkey, e)) {
	BIO_printf(bio_err, "%s: Error setting up peer key\n", prog);
	ERR_print_errors(bio_err);
	goto end;
	}
	if (pkeyopts != NULL) {
	int num = sk_OPENSSL_STRING_num(pkeyopts);
	int i;

	for (i = 0; i < num; ++i) {
	const char *opt = sk_OPENSSL_STRING_value(pkeyopts, i);

	if (pkey_ctrl_string(ctx, opt) <= 0) {
	BIO_printf(bio_err, "%s: Can't set parameter:\n", prog);
	ERR_print_errors(bio_err);
	goto end;
	}
	}
	}

	if (sigfile && (pkey_op != EVP_PKEY_OP_VERIFY)) {
	BIO_printf(bio_err,
	"%s: Signature file specified for non verify\n", prog);
	goto end;
	}

	if (!sigfile && (pkey_op == EVP_PKEY_OP_VERIFY)) {
	BIO_printf(bio_err,
	"%s: No signature file specified for verify\n", prog);
	goto end;
	}

	/* FIXME: seed PRNG only if needed */
	app_RAND_load_file(NULL, 0);

	if (pkey_op != EVP_PKEY_OP_DERIVE) {
	in = bio_open_default(infile, 'r', FORMAT_BINARY);
	if (in == NULL)
	goto end;
	}
	out = bio_open_default(outfile, 'w', FORMAT_BINARY);
	if (out == NULL)
	goto end;

	if (sigfile) {
	BIO *sigbio = BIO_new_file(sigfile, "rb");
	if (!sigbio) {
	BIO_printf(bio_err, "Can't open signature file %s\n", sigfile);
	goto end;
	}
	siglen = bio_to_mem(&sig, keysize * 10, sigbio);
	BIO_free(sigbio);
	if (siglen < 0) {
	BIO_printf(bio_err, "Error reading signature data\n");
	goto end;
	}
	}

	if (in) {
	/* Read the input data */
	buf_inlen = bio_to_mem(&buf_in, keysize * 10, in);
	if (buf_inlen < 0) {
	BIO_printf(bio_err, "Error reading input Data\n");
	exit(1);
	}
	if (rev) {
	size_t i;
	unsigned char ctmp;
	size_t l = (size_t)buf_inlen;
	for (i = 0; i < l / 2; i++) {
	ctmp = buf_in[i];
	buf_in[i] = buf_in[l - 1 - i];
	buf_in[l - 1 - i] = ctmp;
	}
	}
	}

	if (pkey_op == EVP_PKEY_OP_VERIFY) {
	rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
	buf_in, (size_t)buf_inlen);
	if (rv == 1) {
	BIO_puts(out, "Signature Verified Successfully\n");
	ret = 0;
	} else
	BIO_puts(out, "Signature Verification Failure\n");
	goto end;
	}
	if (kdflen != 0) {
	buf_outlen = kdflen;
	rv = 1;
	} else {
	rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
	buf_in, (size_t)buf_inlen);
	}
	if (rv > 0 && buf_outlen != 0) {
	buf_out = app_malloc(buf_outlen, "buffer output");
	rv = do_keyop(ctx, pkey_op,
	buf_out, (size_t *)&buf_outlen,
	buf_in, (size_t)buf_inlen);
	}
	if (rv <= 0) {
	BIO_puts(bio_err, "Public Key operation error\n");
	ERR_print_errors(bio_err);
	goto end;
	}
	ret = 0;

	if (asn1parse) {
	if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
	ERR_print_errors(bio_err);
	} else if (hexdump)
	BIO_dump(out, (char *)buf_out, buf_outlen);
	else
	BIO_write(out, buf_out, buf_outlen);

	end:
	EVP_PKEY_CTX_free(ctx);
	BIO_free(in);
	BIO_free_all(out);
	OPENSSL_free(buf_in);
	OPENSSL_free(buf_out);
	OPENSSL_free(sig);
	sk_OPENSSL_STRING_free(pkeyopts);
	return ret;
	}

	static EVP_PKEY_CTX init_ctx(const char kdfalg, int *pkeysize,
	const char *keyfile, int keyform, int key_type,
	char passinarg, int pkey_op, ENGINE e,
	const int engine_impl)
	{
	EVP_PKEY *pkey = NULL;
	EVP_PKEY_CTX *ctx = NULL;
	ENGINE *impl = NULL;
	char *passin = NULL;
	int rv = -1;
	X509 *x;
	if (((pkey_op == EVP_PKEY_OP_SIGN) \|\| (pkey_op == EVP_PKEY_OP_DECRYPT)
	\|\| (pkey_op == EVP_PKEY_OP_DERIVE))
	&& (key_type != KEY_PRIVKEY && kdfalg == NULL)) {
	BIO_printf(bio_err, "A private key is needed for this operation\n");
	goto end;
	}
	if (!app_passwd(passinarg, NULL, &passin, NULL)) {
	BIO_printf(bio_err, "Error getting password\n");
	goto end;
	}
	switch (key_type) {
	case KEY_PRIVKEY:
	pkey = load_key(keyfile, keyform, 0, passin, e, "Private Key");
	break;

	case KEY_PUBKEY:
	pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "Public Key");
	break;

	case KEY_CERT:
	x = load_cert(keyfile, keyform, "Certificate");
	if (x) {
	pkey = X509_get_pubkey(x);
	X509_free(x);
	}
	break;

	case KEY_NONE:
	break;

	}

	#ifndef OPENSSL_NO_ENGINE
	if (engine_impl)
	impl = e;
	#endif

	if (kdfalg) {
	int kdfnid = OBJ_sn2nid(kdfalg);
	if (kdfnid == NID_undef)
	goto end;
	ctx = EVP_PKEY_CTX_new_id(kdfnid, impl);
	} else {
	if (pkey == NULL)
	goto end;
	*pkeysize = EVP_PKEY_size(pkey);
	ctx = EVP_PKEY_CTX_new(pkey, impl);
	EVP_PKEY_free(pkey);
	}

	if (ctx == NULL)
	goto end;

	switch (pkey_op) {
	case EVP_PKEY_OP_SIGN:
	rv = EVP_PKEY_sign_init(ctx);
	break;

	case EVP_PKEY_OP_VERIFY:
	rv = EVP_PKEY_verify_init(ctx);
	break;

	case EVP_PKEY_OP_VERIFYRECOVER:
	rv = EVP_PKEY_verify_recover_init(ctx);
	break;

	case EVP_PKEY_OP_ENCRYPT:
	rv = EVP_PKEY_encrypt_init(ctx);
	break;

	case EVP_PKEY_OP_DECRYPT:
	rv = EVP_PKEY_decrypt_init(ctx);
	break;

	case EVP_PKEY_OP_DERIVE:
	rv = EVP_PKEY_derive_init(ctx);
	break;
	}

	if (rv <= 0) {
	EVP_PKEY_CTX_free(ctx);
	ctx = NULL;
	}

	end:
	OPENSSL_free(passin);
	return ctx;

	}

	static int setup_peer(EVP_PKEY_CTX ctx, int peerform, const char file,
	ENGINE* e)
	{
	EVP_PKEY *peer = NULL;
	ENGINE* engine = NULL;
	int ret;

	if (peerform == FORMAT_ENGINE)
	engine = e;
	peer = load_pubkey(file, peerform, 0, NULL, engine, "Peer Key");
	if (!peer) {
	BIO_printf(bio_err, "Error reading peer key %s\n", file);
	ERR_print_errors(bio_err);
	return 0;
	}

	ret = EVP_PKEY_derive_set_peer(ctx, peer);

	EVP_PKEY_free(peer);
	if (ret <= 0)
	ERR_print_errors(bio_err);
	return ret;
	}

	static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
	unsigned char out, size_t poutlen,
	unsigned char *in, size_t inlen)
	{
	int rv = 0;
	switch (pkey_op) {
	case EVP_PKEY_OP_VERIFYRECOVER:
	rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
	break;

	case EVP_PKEY_OP_SIGN:
	rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
	break;

	case EVP_PKEY_OP_ENCRYPT:
	rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
	break;

	case EVP_PKEY_OP_DECRYPT:
	rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
	break;

	case EVP_PKEY_OP_DERIVE:
	rv = EVP_PKEY_derive(ctx, out, poutlen);
	break;

	}
	return rv;
	}