github.com/kchristidis/fabric@v1.0.4-0.20171028114726-837acd08cde1/bccsp/factory/nopkcs11.go (about)

     1  // +build nopkcs11
     2  
     3  /*
     4  Copyright IBM Corp. 2017 All Rights Reserved.
     5  
     6  Licensed under the Apache License, Version 2.0 (the "License");
     7  you may not use this file except in compliance with the License.
     8  You may obtain a copy of the License at
     9  
    10  		 http://www.apache.org/licenses/LICENSE-2.0
    11  
    12  Unless required by applicable law or agreed to in writing, software
    13  distributed under the License is distributed on an "AS IS" BASIS,
    14  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15  See the License for the specific language governing permissions and
    16  limitations under the License.
    17  */
    18  package factory
    19  
    20  import (
    21  	"fmt"
    22  
    23  	"github.com/hyperledger/fabric/bccsp"
    24  )
    25  
    26  type FactoryOpts struct {
    27  	ProviderName string  `mapstructure:"default" json:"default" yaml:"Default"`
    28  	SwOpts       *SwOpts `mapstructure:"SW,omitempty" json:"SW,omitempty" yaml:"SwOpts"`
    29  }
    30  
    31  // InitFactories must be called before using factory interfaces
    32  // It is acceptable to call with config = nil, in which case
    33  // some defaults will get used
    34  // Error is returned only if defaultBCCSP cannot be found
    35  func InitFactories(config *FactoryOpts) error {
    36  	factoriesInitOnce.Do(func() {
    37  		// Take some precautions on default opts
    38  		if config == nil {
    39  			config = GetDefaultOpts()
    40  		}
    41  
    42  		if config.ProviderName == "" {
    43  			config.ProviderName = "SW"
    44  		}
    45  
    46  		if config.SwOpts == nil {
    47  			config.SwOpts = GetDefaultOpts().SwOpts
    48  		}
    49  
    50  		// Initialize factories map
    51  		bccspMap = make(map[string]bccsp.BCCSP)
    52  
    53  		// Software-Based BCCSP
    54  		if config.SwOpts != nil {
    55  			f := &SWFactory{}
    56  			err := initBCCSP(f, config)
    57  			if err != nil {
    58  				factoriesInitError = fmt.Errorf("[%s]", err)
    59  			}
    60  		}
    61  
    62  		var ok bool
    63  		defaultBCCSP, ok = bccspMap[config.ProviderName]
    64  		if !ok {
    65  			factoriesInitError = fmt.Errorf("%s\nCould not find default `%s` BCCSP", factoriesInitError, config.ProviderName)
    66  		}
    67  	})
    68  
    69  	return factoriesInitError
    70  }
    71  
    72  // GetBCCSPFromOpts returns a BCCSP created according to the options passed in input.
    73  func GetBCCSPFromOpts(config *FactoryOpts) (bccsp.BCCSP, error) {
    74  	var f BCCSPFactory
    75  	switch config.ProviderName {
    76  	case "SW":
    77  		f = &SWFactory{}
    78  	default:
    79  		return nil, fmt.Errorf("Could not find BCCSP, no '%s' provider", config.ProviderName)
    80  	}
    81  
    82  	csp, err := f.Get(config)
    83  	if err != nil {
    84  		return nil, fmt.Errorf("Could not initialize BCCSP %s [%s]", f.Name(), err)
    85  	}
    86  	return csp, nil
    87  }