crypto/evp/pmeth_gn.c - third_party/openssl - Git at Google

 /*
  * Copyright 2006-2016 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 <stdio.h>
 #include <stdlib.h>
 #include "internal/cryptlib.h"
 #include <openssl/objects.h>
 #include <openssl/evp.h>
 #include "crypto/bn.h"
 #include "crypto/asn1.h"
 #include "crypto/evp.h"
 #include "evp_local.h"

 #ifndef FIPS_MODE
 int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
 {
     int ret;
     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
         EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         return -2;
     }
     ctx->operation = EVP_PKEY_OP_PARAMGEN;
     if (!ctx->pmeth->paramgen_init)
         return 1;
     ret = ctx->pmeth->paramgen_init(ctx);
     if (ret <= 0)
         ctx->operation = EVP_PKEY_OP_UNDEFINED;
     return ret;
 }

 int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
 {
     int ret;
     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
         EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         return -2;
     }

     if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
         return -1;
     }

     if (ppkey == NULL)
         return -1;

     if (*ppkey == NULL)
         *ppkey = EVP_PKEY_new();

     if (*ppkey == NULL) {
         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, ERR_R_MALLOC_FAILURE);
         return -1;
     }

     ret = ctx->pmeth->paramgen(ctx, *ppkey);
     if (ret <= 0) {
         EVP_PKEY_free(*ppkey);
         *ppkey = NULL;
     }
     return ret;
 }

 int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
 {
     int ret;
     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
         EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         return -2;
     }
     ctx->operation = EVP_PKEY_OP_KEYGEN;
     if (!ctx->pmeth->keygen_init)
         return 1;
     ret = ctx->pmeth->keygen_init(ctx);
     if (ret <= 0)
         ctx->operation = EVP_PKEY_OP_UNDEFINED;
     return ret;
 }

 int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
 {
     int ret;

     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
         EVPerr(EVP_F_EVP_PKEY_KEYGEN,
                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         return -2;
     }
     if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
         EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
         return -1;
     }

     if (ppkey == NULL)
         return -1;

     if (*ppkey == NULL)
         *ppkey = EVP_PKEY_new();
     if (*ppkey == NULL)
         return -1;

     ret = ctx->pmeth->keygen(ctx, *ppkey);
     if (ret <= 0) {
         EVP_PKEY_free(*ppkey);
         *ppkey = NULL;
     }
     return ret;
 }

 void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
 {
     ctx->pkey_gencb = cb;
 }

 EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
 {
     return ctx->pkey_gencb;
 }

 /*
  * "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
  * callbacks.
  */

 static int trans_cb(int a, int b, BN_GENCB *gcb)
 {
     EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
     ctx->keygen_info[0] = a;
     ctx->keygen_info[1] = b;
     return ctx->pkey_gencb(ctx);
 }

 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
 {
     BN_GENCB_set(cb, trans_cb, ctx);
 }

 int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
 {
     if (idx == -1)
         return ctx->keygen_info_count;
     if (idx < 0 || idx > ctx->keygen_info_count)
         return 0;
     return ctx->keygen_info[idx];
 }

 EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
                                const unsigned char *key, int keylen)
 {
     EVP_PKEY_CTX *mac_ctx = NULL;
     EVP_PKEY *mac_key = NULL;
     mac_ctx = EVP_PKEY_CTX_new_id(type, e);
     if (!mac_ctx)
         return NULL;
     if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
         goto merr;
     if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
         goto merr;
     if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
         goto merr;
  merr:
     EVP_PKEY_CTX_free(mac_ctx);
     return mac_key;
 }

 #endif /* FIPS_MODE */

 /*- All methods below can also be used in FIPS_MODE */

 static int fromdata_init(EVP_PKEY_CTX *ctx, int operation)
 {
     if (ctx == NULL || ctx->keytype == NULL)
         goto not_supported;

     evp_pkey_ctx_free_old_ops(ctx);
     ctx->operation = operation;
     if (ctx->keymgmt == NULL)
         ctx->keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ctx->keytype,
                                          ctx->propquery);
     if (ctx->keymgmt == NULL)
         goto not_supported;

     return 1;

  not_supported:
     ctx->operation = EVP_PKEY_OP_UNDEFINED;
     ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
     return -2;
 }

 int EVP_PKEY_param_fromdata_init(EVP_PKEY_CTX *ctx)
 {
     return fromdata_init(ctx, EVP_PKEY_OP_PARAMFROMDATA);
 }

 int EVP_PKEY_key_fromdata_init(EVP_PKEY_CTX *ctx)
 {
     return fromdata_init(ctx, EVP_PKEY_OP_KEYFROMDATA);
 }

 int EVP_PKEY_fromdata(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey, OSSL_PARAM params[])
 {
     void *keydata = NULL;
     int selection;

     if (ctx == NULL || (ctx->operation & EVP_PKEY_OP_TYPE_FROMDATA) == 0) {
         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         return -2;
     }

     if (ppkey == NULL)
         return -1;

     if (*ppkey == NULL)
         *ppkey = EVP_PKEY_new();

     if (*ppkey == NULL) {
         ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
         return -1;
     }

     if (ctx->operation == EVP_PKEY_OP_PARAMFROMDATA)
         selection = OSSL_KEYMGMT_SELECT_ALL_PARAMETERS;
     else
         selection = OSSL_KEYMGMT_SELECT_KEYPAIR;
     keydata = evp_keymgmt_util_fromdata(*ppkey, ctx->keymgmt, selection,
                                         params);

     if (keydata == NULL)
         return 0;
     /* keydata is cached in *ppkey, so we need not bother with it further */
     return 1;
 }

 /*
  * TODO(3.0) Re-evaluate the names, it's possible that we find these to be
  * better:
  *
  * EVP_PKEY_param_settable()
  * EVP_PKEY_param_gettable()
  */
 const OSSL_PARAM *EVP_PKEY_param_fromdata_settable(EVP_PKEY_CTX *ctx)
 {
     /* We call fromdata_init to get ctx->keymgmt populated */
     if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED))
         return evp_keymgmt_import_types(ctx->keymgmt,
                                         OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
     return NULL;
 }

 const OSSL_PARAM *EVP_PKEY_key_fromdata_settable(EVP_PKEY_CTX *ctx)
 {
     /* We call fromdata_init to get ctx->keymgmt populated */
     if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED))
         return evp_keymgmt_import_types(ctx->keymgmt,
                                         OSSL_KEYMGMT_SELECT_KEYPAIR);
     return NULL;
 }
	/*
	* Copyright 2006-2016 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 <stdio.h>
	#include <stdlib.h>
	#include "internal/cryptlib.h"
	#include <openssl/objects.h>
	#include <openssl/evp.h>
	#include "crypto/bn.h"
	#include "crypto/asn1.h"
	#include "crypto/evp.h"
	#include "evp_local.h"

	#ifndef FIPS_MODE
	int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
	{
	int ret;
	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->paramgen) {
	EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	return -2;
	}
	ctx->operation = EVP_PKEY_OP_PARAMGEN;
	if (!ctx->pmeth->paramgen_init)
	return 1;
	ret = ctx->pmeth->paramgen_init(ctx);
	if (ret <= 0)
	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	return ret;
	}

	int EVP_PKEY_paramgen(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey)
	{
	int ret;
	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->paramgen) {
	EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	return -2;
	}

	if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
	EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
	return -1;
	}

	if (ppkey == NULL)
	return -1;

	if (*ppkey == NULL)
	*ppkey = EVP_PKEY_new();

	if (*ppkey == NULL) {
	EVPerr(EVP_F_EVP_PKEY_PARAMGEN, ERR_R_MALLOC_FAILURE);
	return -1;
	}

	ret = ctx->pmeth->paramgen(ctx, *ppkey);
	if (ret <= 0) {
	EVP_PKEY_free(*ppkey);
	*ppkey = NULL;
	}
	return ret;
	}

	int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
	{
	int ret;
	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->keygen) {
	EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	return -2;
	}
	ctx->operation = EVP_PKEY_OP_KEYGEN;
	if (!ctx->pmeth->keygen_init)
	return 1;
	ret = ctx->pmeth->keygen_init(ctx);
	if (ret <= 0)
	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	return ret;
	}

	int EVP_PKEY_keygen(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey)
	{
	int ret;

	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->keygen) {
	EVPerr(EVP_F_EVP_PKEY_KEYGEN,
	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	return -2;
	}
	if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
	EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
	return -1;
	}

	if (ppkey == NULL)
	return -1;

	if (*ppkey == NULL)
	*ppkey = EVP_PKEY_new();
	if (*ppkey == NULL)
	return -1;

	ret = ctx->pmeth->keygen(ctx, *ppkey);
	if (ret <= 0) {
	EVP_PKEY_free(*ppkey);
	*ppkey = NULL;
	}
	return ret;
	}

	void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX ctx, EVP_PKEY_gen_cb cb)
	{
	ctx->pkey_gencb = cb;
	}

	EVP_PKEY_gen_cb EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX ctx)
	{
	return ctx->pkey_gencb;
	}

	/*
	* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
	* callbacks.
	*/

	static int trans_cb(int a, int b, BN_GENCB *gcb)
	{
	EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
	ctx->keygen_info[0] = a;
	ctx->keygen_info[1] = b;
	return ctx->pkey_gencb(ctx);
	}

	void evp_pkey_set_cb_translate(BN_GENCB cb, EVP_PKEY_CTX ctx)
	{
	BN_GENCB_set(cb, trans_cb, ctx);
	}

	int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
	{
	if (idx == -1)
	return ctx->keygen_info_count;
	if (idx < 0 \|\| idx > ctx->keygen_info_count)
	return 0;
	return ctx->keygen_info[idx];
	}

	EVP_PKEY EVP_PKEY_new_mac_key(int type, ENGINE e,
	const unsigned char *key, int keylen)
	{
	EVP_PKEY_CTX *mac_ctx = NULL;
	EVP_PKEY *mac_key = NULL;
	mac_ctx = EVP_PKEY_CTX_new_id(type, e);
	if (!mac_ctx)
	return NULL;
	if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
	goto merr;
	if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
	goto merr;
	if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
	goto merr;
	merr:
	EVP_PKEY_CTX_free(mac_ctx);
	return mac_key;
	}

	#endif /* FIPS_MODE */

	/- All methods below can also be used in FIPS_MODE /

	static int fromdata_init(EVP_PKEY_CTX *ctx, int operation)
	{
	if (ctx == NULL \|\| ctx->keytype == NULL)
	goto not_supported;

	evp_pkey_ctx_free_old_ops(ctx);
	ctx->operation = operation;
	if (ctx->keymgmt == NULL)
	ctx->keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ctx->keytype,
	ctx->propquery);
	if (ctx->keymgmt == NULL)
	goto not_supported;

	return 1;

	not_supported:
	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	return -2;
	}

	int EVP_PKEY_param_fromdata_init(EVP_PKEY_CTX *ctx)
	{
	return fromdata_init(ctx, EVP_PKEY_OP_PARAMFROMDATA);
	}

	int EVP_PKEY_key_fromdata_init(EVP_PKEY_CTX *ctx)
	{
	return fromdata_init(ctx, EVP_PKEY_OP_KEYFROMDATA);
	}

	int EVP_PKEY_fromdata(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey, OSSL_PARAM params[])
	{
	void *keydata = NULL;
	int selection;

	if (ctx == NULL \|\| (ctx->operation & EVP_PKEY_OP_TYPE_FROMDATA) == 0) {
	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	return -2;
	}

	if (ppkey == NULL)
	return -1;

	if (*ppkey == NULL)
	*ppkey = EVP_PKEY_new();

	if (*ppkey == NULL) {
	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
	return -1;
	}

	if (ctx->operation == EVP_PKEY_OP_PARAMFROMDATA)
	selection = OSSL_KEYMGMT_SELECT_ALL_PARAMETERS;
	else
	selection = OSSL_KEYMGMT_SELECT_KEYPAIR;
	keydata = evp_keymgmt_util_fromdata(*ppkey, ctx->keymgmt, selection,
	params);

	if (keydata == NULL)
	return 0;
	/* keydata is cached in ppkey, so we need not bother with it further /
	return 1;
	}

	/*
	* TODO(3.0) Re-evaluate the names, it's possible that we find these to be
	* better:
	*
	* EVP_PKEY_param_settable()
	* EVP_PKEY_param_gettable()
	*/
	const OSSL_PARAM EVP_PKEY_param_fromdata_settable(EVP_PKEY_CTX ctx)
	{
	/* We call fromdata_init to get ctx->keymgmt populated */
	if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED))
	return evp_keymgmt_import_types(ctx->keymgmt,
	OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
	return NULL;
	}

	const OSSL_PARAM EVP_PKEY_key_fromdata_settable(EVP_PKEY_CTX ctx)
	{
	/* We call fromdata_init to get ctx->keymgmt populated */
	if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED))
	return evp_keymgmt_import_types(ctx->keymgmt,
	OSSL_KEYMGMT_SELECT_KEYPAIR);
	return NULL;
	}