How to use randomBytes method of crypto Package

Best K6 code snippet using crypto.randomBytes

sampler.go

Source:sampler.go Github

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...7 //"math/rand"8)9// NewUniformPoly generates a new polynomial with coefficients following a uniform distribution over [0, Qi-1]10func (context *Context) UniformPoly(Pol *Poly) {11 var randomBytes []byte12 var randomUint, mask, qi uint6413 n := context.N14 if n < 8 {15 n = 816 }17 randomBytes = make([]byte, n)18 if _, err := rand.Read(randomBytes); err != nil {19 panic("crypto rand error")20 }21 level := uint64(len(Pol.Coeffs) - 1)22 for j := uint64(0); j < level+1; j++ {23 qi = context.Modulus[j]24 // Starts by computing the mask25 mask = (1 << uint64(bits.Len64(qi))) - 126 ptmp := Pol.Coeffs[j]27 // Iterates for each modulus over each coefficient28 for i := uint64(0); i < context.N; i++ {29 // Samples an integer between [0, qi-1]30 for {31 // Replenishes the pool if it runs empty32 if len(randomBytes) < 8 {33 randomBytes = make([]byte, n)34 if _, err := rand.Read(randomBytes); err != nil {35 panic("crypto rand error")36 }37 }38 // Reads bytes from the pool39 randomUint = binary.BigEndian.Uint64(randomBytes[:8]) & mask40 randomBytes = randomBytes[8:] // Discard the used bytes41 // If the integer is between [0, qi-1], breaks the loop42 if randomUint < qi {43 break44 }45 }46 ptmp[i] = randomUint47 }48 }49 return50}51// NewUniformPoly generates a new polynomial with coefficients following a uniform distribution over [0, Qi-1]52func (context *Context) NewUniformPoly() (Pol *Poly) {53 Pol = context.NewPoly()54 context.UniformPoly(Pol)55 return56}57func (context *Context) NewUniformPolyLvl(level uint64) (Pol *Poly) {58 Pol = context.NewPolyLvl(level)59 context.UniformPoly(Pol)60 return61}62// RandUniform samples a uniform randomInt variable in the range [0, mask] until randomInt is in the range [0, v-1].63// mask needs to be of the form 2^n -1.64func RandUniform(v uint64, mask uint64) (randomInt uint64) {65 for {66 randomInt = randInt64(mask)67 if randomInt < v {68 return randomInt69 }70 }71}72// randInt32 samples a uniform variable in the range [0, mask], where mask is of the form 2^n-1, with n in [0, 32].73func randInt32(mask uint64) uint64 {74 // generate random 4 bytes75 randomBytes := make([]byte, 4)76 _, err := rand.Read(randomBytes)77 if err != nil {78 panic("crypto rand error")79 }80 // convert 4 bytes to a uint3281 randomUint32 := uint64(binary.BigEndian.Uint32(randomBytes))82 // return required bits83 return mask & randomUint3284}85// randInt64 samples a uniform variable in the range [0, mask], where mask is of the form 2^n-1, with n in [0, 64].86func randInt64(mask uint64) uint64 {87 // generate random 8 bytes88 randomBytes := make([]byte, 8)89 _, err := rand.Read(randomBytes)90 if err != nil {91 panic("crypto rand error")92 }93 // convert 8 bytes to a uint6494 randomUint64 := binary.BigEndian.Uint64(randomBytes)95 // return required bits96 return mask & randomUint6497}98// randFloat64 returns a uniform float64 value between 0 and 199func randFloat64(randomBytes []byte) float64 {100 return float64(binary.BigEndian.Uint64(randomBytes)&0x1fffffffffffff) / float64(0x1fffffffffffff)101}102// NormFloat64 returns a normally distributed float64 in103// the range -math.MaxFloat64 through +math.MaxFloat64 inclusive,104// with standard normal distribution (mean = 0, stddev = 1).105// To produce a different normal distribution, callers can106// adjust the output using:107//108// sample = NormFloat64() * desiredStdDev + desiredMean109// Algorithm adapted from https://golang.org/src/math/rand/normal.go110func normFloat64(randomBytes []byte) (float64, uint64, []byte) {111 for {112 if len(randomBytes) < 4 {113 randomBytes = make([]byte, 1024)114 if _, err := rand.Read(randomBytes); err != nil {115 panic("crypto rand error")116 }117 }118 juint32 := binary.BigEndian.Uint32(randomBytes[:4])119 randomBytes = randomBytes[4:]120 j := int32(juint32 & 0x7fffffff)121 sign := uint64(juint32 >> 31)122 i := j & 0x7F123 x := float64(j) * float64(wn[i])124 // 1125 if uint32(j) < kn[i] {126 // This case should be hit better than 99% of the time.127 return x, sign, randomBytes128 }129 // 2130 if i == 0 {131 // This extra work is only required for the base strip.132 for {133 if len(randomBytes) < 16 {134 randomBytes = make([]byte, 1024)135 if _, err := rand.Read(randomBytes); err != nil {136 panic("crypto rand error")137 }138 }139 x = -math.Log(randFloat64(randomBytes)) * (1.0 / 3.442619855899)140 y := -math.Log(randFloat64(randomBytes))141 if y+y >= x*x {142 break143 }144 }145 return x + 3.442619855899, sign, randomBytes146 }147 if len(randomBytes) < 8 {148 randomBytes = make([]byte, 1024)149 if _, err := rand.Read(randomBytes); err != nil {150 panic("crypto rand error")151 }152 }153 // 3154 if fn[i]+float32(randFloat64(randomBytes))*(fn[i-1]-fn[i]) < float32(math.Exp(-0.5*x*x)) {155 return x, sign, randomBytes156 }157 }158}159var kn = [128]uint32{160 0x76ad2212, 0x0, 0x600f1b53, 0x6ce447a6, 0x725b46a2,161 0x7560051d, 0x774921eb, 0x789a25bd, 0x799045c3, 0x7a4bce5d,162 0x7adf629f, 0x7b5682a6, 0x7bb8a8c6, 0x7c0ae722, 0x7c50cce7,163 0x7c8cec5b, 0x7cc12cd6, 0x7ceefed2, 0x7d177e0b, 0x7d3b8883,164 0x7d5bce6c, 0x7d78dd64, 0x7d932886, 0x7dab0e57, 0x7dc0dd30,165 0x7dd4d688, 0x7de73185, 0x7df81cea, 0x7e07c0a3, 0x7e163efa,166 0x7e23b587, 0x7e303dfd, 0x7e3beec2, 0x7e46db77, 0x7e51155d,167 0x7e5aabb3, 0x7e63abf7, 0x7e6c222c, 0x7e741906, 0x7e7b9a18,168 0x7e82adfa, 0x7e895c63, 0x7e8fac4b, 0x7e95a3fb, 0x7e9b4924,169 0x7ea0a0ef, 0x7ea5b00d, 0x7eaa7ac3, 0x7eaf04f3, 0x7eb3522a,...

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crypto_core1.go

Source:crypto_core1.go Github

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1package mintox2/*3#cgo LDFLAGS: -lsodium4#include <stdint.h>5#include <sodium.h>6*/7import "C"8import (9 "fmt"10 "gopp"11 "unsafe"12 // pure go: github.com/kevinburke/nacl13 // pure go: github.com/ArteMisc/libgodium14 // fork of GoKillers/libsodium-go: github.com/jamesruan/sodium15 "github.com/GoKillers/libsodium-go/cryptobox"16 "github.com/GoKillers/libsodium-go/randombytes"17 "github.com/pkg/errors"18)19func NewCBKeyPair1() (pk *CryptoKey, sk *CryptoKey, err error) {20 // note: order is: sk, pk from under call, but return order is: pk, sk21 seckey, pubkey, iret := cryptobox.CryptoBoxKeyPair()22 return NewCryptoKey(pubkey), NewCryptoKey(seckey), cbiret2err1(iret)23}24func CBRandomNonce1() *CBNonce {25 buf := randombytes.RandomBytes(cryptobox.CryptoBoxNonceBytes())26 return &CBNonce{buf, (*_CBNonce)(unsafe.Pointer(&buf[0]))}27}28func (this *CBNonce) Incr1() {29 gopp.BytesReverse(this.byteArray)30 p := (*C.uint8_t)(unsafe.Pointer(&this.byteArray[0]))31 C.sodium_increment(p, C.size_t(len(this.byteArray)))32 gopp.BytesReverse(this.byteArray)33}34func (this *CBNonce) Incrn1(n int) {35 gopp.BytesReverse(this.byteArray)36 p := (*C.uint8_t)(unsafe.Pointer(&this.byteArray[0]))37 for i := 0; i < n; i++ {38 C.sodium_increment(p, C.size_t(len(this.byteArray)))39 }40 gopp.BytesReverse(this.byteArray)41}42func CBRandomBytes1(n int) []byte { return randombytes.RandomBytes(n) }43func CBDerivePubkey1(seckey *CryptoKey) (pubkey *CryptoKey) {44 buf := randombytes.RandomBytes(cryptobox.CryptoBoxPublicKeyBytes())45 C.crypto_scalarmult_curve25519_base((*C.uint8_t)(unsafe.Pointer(&buf[0])),46 (*C.uint8_t)(unsafe.Pointer(&seckey.byteArray[0])))47 pubkey = NewCryptoKey(buf)48 return49}50func cbiret2err1(iret int) error {51 if iret != 0 {52 return fmt.Errorf("cryptobox error: %d", iret)53 }54 return nil55}56func CBBeforeNm1(pk *CryptoKey, sk *CryptoKey) (*CryptoKey, error) {57 keybin, iret := cryptobox.CryptoBoxBeforeNm(pk.Bytes(), sk.Bytes())58 return NewCryptoKey(keybin), cbiret2err1(iret)59}60func CBAfterNm1(seckey *CryptoKey, nonce *CBNonce, plain []byte) (encrypted []byte, err error) {61 encrypted, iret := cryptobox.CryptoBoxAfterNm(plain, nonce.Bytes(), seckey.Bytes())62 return encrypted, cbiret2err1(iret)63}64func CBOpenAfterNm1(seckey *CryptoKey, nonce *CBNonce, encrypted []byte) (plain []byte, err error) {65 plain, iret := cryptobox.CryptoBoxOpenAfterNm(encrypted, nonce.Bytes(), seckey.Bytes())66 return plain, cbiret2err1(iret)67}68/////69func EncryptDataSymmetric1(seckey *CryptoKey, nonce *CBNonce, plain []byte) (encrypted []byte, err error) {70 temp_plain := make([]byte, len(plain)+cryptobox.CryptoBoxZeroBytes())71 n := copy(temp_plain[cryptobox.CryptoBoxZeroBytes():], plain)72 gopp.Assert(n == len(plain), "copy error", n, len(plain))73 encrypted, err = CBAfterNm1(seckey, nonce, temp_plain)74 if err != nil {75 err = errors.Wrap(err, "")76 return77 }78 encrypted = encrypted[cryptobox.CryptoBoxBoxZeroBytes():]79 gopp.Assert(len(encrypted) == len(plain)+cryptobox.CryptoBoxMacBytes(),80 "size error:", len(encrypted), len(plain))81 return82}83func DecryptDataSymmetric1(seckey *CryptoKey, nonce *CBNonce, encrypted []byte) (plain []byte, err error) {84 temp_encrypted := make([]byte, len(encrypted)+cryptobox.CryptoBoxBoxZeroBytes())85 copy(temp_encrypted[cryptobox.CryptoBoxBoxZeroBytes():], encrypted)86 plain, err = CBOpenAfterNm1(seckey, nonce, temp_encrypted)87 gopp.ErrPrint(err, len(plain), len(encrypted))88 plain = plain[cryptobox.CryptoBoxZeroBytes():]89 gopp.Assert(len(plain) == len(encrypted)-cryptobox.CryptoBoxMacBytes(),90 "size error:", len(plain), len(encrypted))91 if err != nil {92 err = errors.Wrap(err, "")93 }94 return95}...

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rand.go

Source:rand.go Github

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...30 }31 }32 // Node.js33 if require := js.Global.Get("require"); require != js.Undefined {34 if randomBytes := require.Invoke("crypto").Get("randomBytes"); randomBytes != js.Undefined {35 array.Call("set", randomBytes.Invoke(len(b)), offset)36 return len(b), nil37 }38 }39 return 0, errors.New("crypto/rand not available in this environment")40}...

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randomBytes

Using AI Code Generation

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1import (2func main() {3 b := make([]byte, 16)4 if _, err := io.ReadFull(rand.Reader, b); err != nil {5 fmt.Println("Error:", err)6 }7 fmt.Println(b)8}9import (10func main() {11 b := make([]byte, 16)12 if _, err := rand.Read(b); err != nil {13 fmt.Println("Error:", err)14 }15 fmt.Println(b)16}17import (18func main() {19 b := make([]byte, 16)20 if _, err := rand.Int(rand.Reader, b); err != nil {21 fmt.Println("Error:", err)22 }23 fmt.Println(b)24}

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randomBytes

Using AI Code Generation

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1import (2func main() {3 b := make([]byte, 32)4 rand.Read(b)5 fmt.Println(base64.StdEncoding.EncodeToString(b))6}7import (8func main() {9 b := make([]byte, 32)10 rand.Read(b)11 fmt.Println(base64.StdEncoding.EncodeToString(b))12}13import (14func main() {15 b := make([]byte, 32)16 rand.Read(b)17 fmt.Println(base64.StdEncoding.EncodeToString(b))18}19import (20func main() {21 b := make([]byte, 32)22 rand.Read(b)23 fmt.Println(base64.StdEncoding.EncodeToString(b))24}25import (26func main() {27 b := make([]byte, 32)28 rand.Read(b)29 fmt.Println(base64.StdEncoding.EncodeToString(b))30}

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randomBytes

Using AI Code Generation

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1import (2func main() {3 b := make([]byte, 16)4 _, err := rand.Read(b)5 if err != nil {6 fmt.Println("error:", err)7 }8 fmt.Printf("%x9}

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randomBytes

Using AI Code Generation

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1import (2func main() {3 bytes := make([]byte, 10)4 rand.Read(bytes)5 fmt.Println(bytes)6}7import (8func main() {9 bytes := make([]byte, 10)10 rand.Read(bytes)11 fmt.Println(bytes)12}13import (14func main() {15 bytes := make([]byte, 10)16 rand.Read(bytes)17 fmt.Println(bytes)18}19import (20func main() {21 bytes := make([]byte, 10)22 rand.Read(bytes)23 fmt.Println(bytes)24}25import (26func main() {27 bytes := make([]byte, 10)28 rand.Read(bytes)29 fmt.Println(bytes)30}31import (32func main() {33 bytes := make([]byte, 10)34 rand.Read(bytes)35 fmt.Println(bytes)36}37import (38func main() {39 bytes := make([]byte, 10)40 rand.Read(bytes)41 fmt.Println(bytes)42}43import (44func main() {45 bytes := make([]byte, 10)46 rand.Read(bytes)47 fmt.Println(bytes)48}49import (50func main() {51 bytes := make([]byte, 10)52 rand.Read(bytes)53 fmt.Println(bytes)54}55import (

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randomBytes

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1import (2func main() {3 fmt.Println("Hello, World!")4 b := make([]byte, 32)5 rand.Read(b)6 fmt.Println(b)7}

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randomBytes

Using AI Code Generation

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1import (2func main() {3 rand.Read(b[:])4 fmt.Printf("%x", b)5}6import (7func main() {8 n, err := rand.Int(rand.Reader, big.NewInt(1000))9 if err != nil {10 fmt.Println(err)11 }12 fmt.Printf("%d", n)13}14import (15func main() {16 var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")17 b := make([]rune, 10)18 for i := range b {19 n, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))20 if err != nil {21 fmt.Println(err)22 }23 b[i] = letters[n.Int64()]24 }25 fmt.Println(string(b))26}27import (28func main() {29 var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")30 b := make([]rune, 10)31 for i := range b {32 n, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))33 if err != nil {34 fmt.Println(err)35 }36 b[i] = letters[n.Int64()]37 }

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randomBytes

Using AI Code Generation

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1import "crypto/rand"2import "fmt"3func main() {4 b := make([]byte, 16)5 _, err := rand.Read(b)6 if err != nil {7 fmt.Println("Error:", err)8 }9 fmt.Printf("%x10}11func Read(b []byte) (n int, err error)12import "crypto/rand"13import "fmt"14func main() {15 b := make([]byte, 16)16 n, err := rand.Read(b)17 if err != nil {18 fmt.Println("Error:", err)19 }20 fmt.Println("Number of bytes:", n)21 fmt.Printf("%x22}23func ReadByte() (byte, error)24import "crypto/rand"25import "fmt"26func main() {27 b, err := rand.ReadByte()28 if err != nil {29 fmt.Println("Error:", err)30 }31 fmt.Println("Random byte:", b)32}

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randomBytes

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1import (2func main() {3 n, err := rand.Int(rand.Reader, big.NewInt(1000))4 if err != nil {5 fmt.Println("error:", err)6 }7 fmt.Println(n)8}9import (10func main() {11 n, err := rand.Float64()12 if err != nil {13 fmt.Println("error:", err)14 }15 fmt.Println(n)16}17import (18func main() {19 n, err := rand.Int(rand.Reader, big.NewInt(36))20 if err != nil {21 fmt.Println("error:", err)22 }23 fmt.Println(n)24}

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randomBytes

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1func main() {2 randomBytes := make([]byte, 16)3 _, err := rand.Read(randomBytes)4 if err != nil {5 panic(err)6 }7 fmt.Println(randomBytes)8 randomString := base64.URLEncoding.EncodeToString(randomBytes)9 fmt.Println(randomString)10}11func main() {12 randomInt, err := rand.Int(rand.Reader, big.NewInt(100))13 if err != nil {14 panic(err)15 }16 fmt.Println(randomInt)17}18func main() {19 randomInt := rand.Intn(100)20 fmt.Println(randomInt)21}

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