Documentation
¶
Overview ¶
Package drbg implements Random Number Generation Using Deterministic Random Bit Generators.
Index ¶
- Constants
- Variables
- type BaseDrbg
- type CtrDrbg
- func NewCtrDrbg(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, ...) (*CtrDrbg, error)
- func NewGMCtrDrbg(securityLevel SecurityLevel, entropy, nonce, personalization []byte) (*CtrDrbg, error)
- func NewNISTCtrDrbg(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, ...) (*CtrDrbg, error)
- type DRBG
- type DrbgPrng
- func NewCtrDrbgPrng(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, ...) (*DrbgPrng, error)
- func NewGmCtrDrbgPrng(entropySource io.Reader, securityStrength int, securityLevel SecurityLevel, ...) (*DrbgPrng, error)
- func NewGmHashDrbgPrng(entropySource io.Reader, securityStrength int, securityLevel SecurityLevel, ...) (*DrbgPrng, error)
- func NewHashDrbgPrng(newHash func() hash.Hash, entropySource io.Reader, securityStrength int, ...) (*DrbgPrng, error)
- func NewNistCtrDrbgPrng(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, ...) (*DrbgPrng, error)
- func NewNistHashDrbgPrng(newHash func() hash.Hash, entropySource io.Reader, securityStrength int, ...) (*DrbgPrng, error)
- type HashDrbg
- func NewGMHashDrbg(securityLevel SecurityLevel, entropy, nonce, personalization []byte) (*HashDrbg, error)
- func NewHashDrbg(newHash func() hash.Hash, securityLevel SecurityLevel, gm bool, ...) (*HashDrbg, error)
- func NewNISTHashDrbg(newHash func() hash.Hash, securityLevel SecurityLevel, ...) (*HashDrbg, error)
- type SecurityLevel
Examples ¶
Constants ¶
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const DRBG_RESEED_COUNTER_INTERVAL_LEVEL1 uint64 = 1 << 20
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const DRBG_RESEED_COUNTER_INTERVAL_LEVEL2 uint64 = 1 << 10
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const DRBG_RESEED_COUNTER_INTERVAL_LEVEL_TEST uint64 = 8
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const DRBG_RESEED_TIME_INTERVAL_LEVEL1 = time.Duration(600) * time.Second
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const DRBG_RESEED_TIME_INTERVAL_LEVEL2 = time.Duration(60) * time.Second
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const DRBG_RESEED_TIME_INTERVAL_LEVEL_TEST = time.Duration(6) * time.Second
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const HASH_DRBG_MAX_SEED_SIZE = 111
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const HASH_DRBG_SEED_SIZE = 55
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const MAX_BYTES = 1 << 27
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const MAX_BYTES_PER_GENERATE = 1 << 11
Variables ¶
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var ErrReseedRequired = errors.New("drbg: reseed reuqired")
Functions ¶
This section is empty.
Types ¶
type BaseDrbg ¶
type BaseDrbg struct {
// contains filtered or unexported fields
}
func (*BaseDrbg) NeedReseed ¶
type CtrDrbg ¶
type CtrDrbg struct {
BaseDrbg
// contains filtered or unexported fields
}
CtrDrbg CTR DRBG structure, its instance is NOT goroutine safe!!!
func NewCtrDrbg ¶
func NewCtrDrbg(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, securityLevel SecurityLevel, gm bool, entropy, nonce, personalization []byte) (*CtrDrbg, error)
NewCtrDrbg create one CTR DRBG instance
func NewGMCtrDrbg ¶
func NewGMCtrDrbg(securityLevel SecurityLevel, entropy, nonce, personalization []byte) (*CtrDrbg, error)
NewGMCtrDrbg create one CTR DRBG implementation which follows GM/T 0105-2021 standard
func NewNISTCtrDrbg ¶
func NewNISTCtrDrbg(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, securityLevel SecurityLevel, entropy, nonce, personalization []byte) (*CtrDrbg, error)
NewNISTCtrDrbg create one CTR DRBG implementation which follows NIST standard
func (*CtrDrbg) MaxBytesPerRequest ¶
type DRBG ¶
type DRBG interface {
// check internal state, return if reseed required
NeedReseed() bool
// reseed process
Reseed(entropy, additional []byte) error
// generate requrested bytes to b
Generate(b, additional []byte) error
// MaxBytesPerRequest return max bytes per request
MaxBytesPerRequest() int
}
DRBG interface for both hash and ctr drbg implementations
type DrbgPrng ¶
type DrbgPrng struct {
// contains filtered or unexported fields
}
DrbgPrng sample pseudo random number generator base on DRBG
func NewCtrDrbgPrng ¶
func NewCtrDrbgPrng(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, entropySource io.Reader, securityStrength int, gm bool, securityLevel SecurityLevel, personalization []byte) (*DrbgPrng, error)
NewCtrDrbgPrng create pseudo random number generator base on CTR DRBG
func NewGmCtrDrbgPrng ¶
func NewGmCtrDrbgPrng(entropySource io.Reader, securityStrength int, securityLevel SecurityLevel, personalization []byte) (*DrbgPrng, error)
NewNistCtrDrbgPrng create pseudo random number generator base on CTR DRBG which follows GM/T 0105-2021 standard
Example ¶
package main
import (
"bytes"
"fmt"
"github.com/emmansun/gmsm/drbg"
)
func main() {
prng, err := drbg.NewGmCtrDrbgPrng(nil, 32, drbg.SECURITY_LEVEL_TEST, nil)
if err != nil {
panic(err)
}
c := 10
b := make([]byte, c)
_, err = prng.Read(b)
if err != nil {
fmt.Println("error:", err)
return
}
// The slice should now contain random bytes instead of only zeroes.
fmt.Println(bytes.Equal(b, make([]byte, c)))
}
Output: false
func NewGmHashDrbgPrng ¶
func NewGmHashDrbgPrng(entropySource io.Reader, securityStrength int, securityLevel SecurityLevel, personalization []byte) (*DrbgPrng, error)
NewGmHashDrbgPrng create pseudo random number generator base on hash DRBG which follows GM/T 0105-2021 standard
Example ¶
package main
import (
"bytes"
"fmt"
"github.com/emmansun/gmsm/drbg"
)
func main() {
prng, err := drbg.NewGmHashDrbgPrng(nil, 32, drbg.SECURITY_LEVEL_TEST, nil)
if err != nil {
panic(err)
}
c := 10
b := make([]byte, c)
_, err = prng.Read(b)
if err != nil {
fmt.Println("error:", err)
return
}
// The slice should now contain random bytes instead of only zeroes.
fmt.Println(bytes.Equal(b, make([]byte, c)))
}
Output: false
func NewHashDrbgPrng ¶
func NewHashDrbgPrng(newHash func() hash.Hash, entropySource io.Reader, securityStrength int, gm bool, securityLevel SecurityLevel, personalization []byte) (*DrbgPrng, error)
NewHashDrbgPrng create pseudo random number generator base on HASH DRBG
func NewNistCtrDrbgPrng ¶
func NewNistCtrDrbgPrng(cipherProvider func(key []byte) (cipher.Block, error), keyLen int, entropySource io.Reader, securityStrength int, securityLevel SecurityLevel, personalization []byte) (*DrbgPrng, error)
NewNistCtrDrbgPrng create pseudo random number generator base on CTR DRBG which follows NIST standard
func NewNistHashDrbgPrng ¶
func NewNistHashDrbgPrng(newHash func() hash.Hash, entropySource io.Reader, securityStrength int, securityLevel SecurityLevel, personalization []byte) (*DrbgPrng, error)
NewNistHashDrbgPrng create pseudo random number generator base on hash DRBG which follows NIST standard
type HashDrbg ¶
type HashDrbg struct {
BaseDrbg
// contains filtered or unexported fields
}
HashDrbg hash DRBG structure, its instance is NOT goroutine safe!!!
func NewGMHashDrbg ¶
func NewGMHashDrbg(securityLevel SecurityLevel, entropy, nonce, personalization []byte) (*HashDrbg, error)
NewGMHashDrbg return hash DRBG implementation which follows GM/T 0105-2021 standard
func NewHashDrbg ¶
func NewHashDrbg(newHash func() hash.Hash, securityLevel SecurityLevel, gm bool, entropy, nonce, personalization []byte) (*HashDrbg, error)
NewHashDrbg create one hash DRBG instance
func NewNISTHashDrbg ¶
func NewNISTHashDrbg(newHash func() hash.Hash, securityLevel SecurityLevel, entropy, nonce, personalization []byte) (*HashDrbg, error)
NewNISTHashDrbg return hash DRBG implementation which follows NIST standard
func (*HashDrbg) Generate ¶
Generate hash DRBG pseudorandom bits process. GM/T 0105-2021 has a little different with NIST. GM/T 0105-2021 can only generate no more than hash.Size bytes once.
func (*HashDrbg) MaxBytesPerRequest ¶
type SecurityLevel ¶
type SecurityLevel byte
const ( SECURITY_LEVEL_ONE SecurityLevel = 0x01 SECURITY_LEVEL_TWO SecurityLevel = 0x02 SECURITY_LEVEL_TEST SecurityLevel = 0x99 )
Source Files
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