How to use randomBytes method of crypto Package

Best K6 code snippet using crypto.randomBytes

sampler.go

Source:sampler.go

...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,...

crypto_core1.go

Source:crypto_core1.go

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}...

rand.go

Source:rand.go

...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}...

randomBytes

Using AI Code Generation

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}

randomBytes

Using AI Code Generation

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}

randomBytes

Using AI Code Generation

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}

randomBytes

Using AI Code Generation

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 (

randomBytes

Using AI Code Generation

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

randomBytes

Using AI Code Generation

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    }

randomBytes

Using AI Code Generation

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}

randomBytes

Using AI Code Generation

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}

randomBytes

Using AI Code Generation

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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