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bigint-crypto-utils - v3.0.20

Table of contents

Functions

Functions

abs

▸ abs(a): number | bigint

Absolute value. abs(a)==a if a>=0. abs(a)==-a if a<0

Parameters

Name Type
a number | bigint

Returns

number | bigint

The absolute value of a

Defined in

node_modules/bigint-mod-arith/types/abs.d.ts:8

bitLength

▸ bitLength(a): number

Returns the bitlength of a number

Parameters

Name Type
a number | bigint

Returns

number

The bit length

Defined in

node_modules/bigint-mod-arith/types/bitLength.d.ts:7

eGcd

▸ eGcd(a, b): Egcd

An iterative implementation of the extended euclidean algorithm or extended greatest common divisor algorithm. Take positive integers a, b as input, and return a triple (g, x, y), such that ax + by = g = gcd(a, b).

throws {RangeError} This excepction is thrown if a or b are less than 0

Parameters

Name Type
a number | bigint
b number | bigint

Returns

Egcd

A triple (g, x, y), such that ax + by = g = gcd(a, b).

Defined in

node_modules/bigint-mod-arith/types/egcd.d.ts:18

gcd

▸ gcd(a, b): bigint

Greatest-common divisor of two integers based on the iterative binary algorithm.

Parameters

Name Type
a number | bigint
b number | bigint

Returns

bigint

The greatest common divisor of a and b

Defined in

node_modules/bigint-mod-arith/types/gcd.d.ts:9

isProbablyPrime

▸ isProbablyPrime(w, iterations?, disableWorkers?): Promise<boolean>

The test first tries if any of the first 250 small primes are a factor of the input number and then passes several iterations of Miller-Rabin Probabilistic Primality Test (FIPS 186-4 C.3.1)

throws {RangeError} w MUST be >= 0

Parameters

Name Type Default value Description
w number | bigint undefined A positive integer to be tested for primality
iterations number 16 The number of iterations for the primality test. The value shall be consistent with Table C.1, C.2 or C.3
disableWorkers boolean false Disable the use of workers for the primality test

Returns

Promise<boolean>

A promise that resolves to a boolean that is either true (a probably prime number) or false (definitely composite)

Defined in

src/ts/isProbablyPrime.ts:21

lcm

▸ lcm(a, b): bigint

The least common multiple computed as abs(a*b)/gcd(a,b)

Parameters

Name Type
a number | bigint
b number | bigint

Returns

bigint

The least common multiple of a and b

Defined in

node_modules/bigint-mod-arith/types/lcm.d.ts:8

max

▸ max(a, b): number | bigint

Maximum. max(a,b)==a if a>=b. max(a,b)==b if a<=b

Parameters

Name Type
a number | bigint
b number | bigint

Returns

number | bigint

Maximum of numbers a and b

Defined in

node_modules/bigint-mod-arith/types/max.d.ts:9

min

▸ min(a, b): number | bigint

Minimum. min(a,b)==b if a>=b. min(a,b)==a if a<=b

Parameters

Name Type
a number | bigint
b number | bigint

Returns

number | bigint

Minimum of numbers a and b

Defined in

node_modules/bigint-mod-arith/types/min.d.ts:9

modInv

▸ modInv(a, n): bigint

Modular inverse.

throws {RangeError} Excpeption thorwn when a does not have inverse modulo n

Parameters

Name Type Description
a number | bigint The number to find an inverse for
n number | bigint The modulo

Returns

bigint

The inverse modulo n

Defined in

node_modules/bigint-mod-arith/types/modInv.d.ts:12

modPow

▸ modPow(b, e, n): bigint

Modular exponentiation b**e mod n. Currently using the right-to-left binary method

throws {RangeError} Excpeption thrown when n is not > 0

Parameters

Name Type Description
b number | bigint base
e number | bigint exponent
n number | bigint modulo

Returns

bigint

b**e mod n

Defined in

node_modules/bigint-mod-arith/types/modPow.d.ts:13

prime

▸ prime(bitLength, iterations?): Promise<bigint>

A probably-prime (Miller-Rabin), cryptographically-secure, random-number generator. The browser version uses web workers to parallelise prime look up. Therefore, it does not lock the UI main process, and it can be much faster (if several cores or cpu are available). The node version can also use worker_threads if they are available (enabled by default with Node 11 and and can be enabled at runtime executing node --experimental-worker with node >=10.5.0).

throws {RangeError} bitLength MUST be > 0

Parameters

Name Type Default value Description
bitLength number undefined The required bit length for the generated prime
iterations number 16 The number of iterations for the Miller-Rabin Probabilistic Primality Test

Returns

Promise<bigint>

A promise that resolves to a bigint probable prime of bitLength bits.

Defined in

src/ts/prime.ts:21

primeSync

▸ primeSync(bitLength, iterations?): bigint

A probably-prime (Miller-Rabin), cryptographically-secure, random-number generator. The sync version is NOT RECOMMENDED since it won't use workers and thus it'll be slower and may freeze thw window in browser's javascript. Please consider using prime() instead.

throws {RangeError} bitLength MUST be > 0

Parameters

Name Type Default value Description
bitLength number undefined The required bit length for the generated prime
iterations number 16 The number of iterations for the Miller-Rabin Probabilistic Primality Test

Returns

bigint

A bigint probable prime of bitLength bits.

Defined in

src/ts/prime.ts:100

randBetween

▸ randBetween(max, min?): bigint

Returns a cryptographically secure random integer between [min,max]. Both numbers must be >=0

throws {RangeError} Arguments MUST be: max > 0 && min >=0 && max > min

Parameters

Name Type Description
max bigint Returned value will be <= max
min bigint Returned value will be >= min

Returns

bigint

A cryptographically secure random bigint between [min,max]

Defined in

src/ts/randBetween.ts:15

randBits

▸ randBits(bitLength, forceLength?): Promise<Uint8Array | Buffer>

Secure random bits for both node and browsers. Node version uses crypto.randomFill() and browser one self.crypto.getRandomValues()

throws {RangeError} bitLength MUST be > 0

Parameters

Name Type Default value Description
bitLength number undefined The desired number of random bits
forceLength boolean false If we want to force the output to have a specific bit length. It basically forces the msb to be 1

Returns

Promise<Uint8Array | Buffer>

A Promise that resolves to a UInt8Array/Buffer (Browser/Node.js) filled with cryptographically secure random bits

Defined in

src/ts/randBits.ts:14

randBitsSync

▸ randBitsSync(bitLength, forceLength?): Uint8Array | Buffer

Secure random bits for both node and browsers. Node version uses crypto.randomFill() and browser one self.crypto.getRandomValues()

throws {RangeError} bitLength MUST be > 0

Parameters

Name Type Default value Description
bitLength number undefined The desired number of random bits
forceLength boolean false If we want to force the output to have a specific bit length. It basically forces the msb to be 1

Returns

Uint8Array | Buffer

A Uint8Array/Buffer (Browser/Node.js) filled with cryptographically secure random bits

Defined in

src/ts/randBits.ts:45

randBytes

▸ randBytes(byteLength, forceLength?): Promise<Uint8Array | Buffer>

Secure random bytes for both node and browsers. Node version uses crypto.randomBytes() and browser one self.crypto.getRandomValues()

throws {RangeError} byteLength MUST be > 0

Parameters

Name Type Default value Description
byteLength number undefined The desired number of random bytes
forceLength boolean false If we want to force the output to have a bit length of 8*byteLength. It basically forces the msb to be 1

Returns

Promise<Uint8Array | Buffer>

A promise that resolves to a UInt8Array/Buffer (Browser/Node.js) filled with cryptographically secure random bytes

Defined in

src/ts/randBytes.ts:12

randBytesSync

▸ randBytesSync(byteLength, forceLength?): Uint8Array | Buffer

Secure random bytes for both node and browsers. Node version uses crypto.randomFill() and browser one self.crypto.getRandomValues()

throws {RangeError} byteLength MUST be > 0

Parameters

Name Type Default value Description
byteLength number undefined The desired number of random bytes
forceLength boolean false If we want to force the output to have a bit length of 8*byteLength. It basically forces the msb to be 1

Returns

Uint8Array | Buffer

A UInt8Array/Buffer (Browser/Node.js) filled with cryptographically secure random bytes

Defined in

src/ts/randBytes.ts:46

toZn

▸ toZn(a, n): bigint

Finds the smallest positive element that is congruent to a in modulo n

remarks a and b must be the same type, either number or bigint

throws {RangeError} Excpeption thrown when n is not > 0

Parameters

Name Type Description
a number | bigint An integer
n number | bigint The modulo

Returns

bigint

A bigint with the smallest positive representation of a modulo n

Defined in

node_modules/bigint-mod-arith/types/toZn.d.ts:15