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GeezerVison is showing github.com — crypto: refactor ArrayBuffer to bigint conversion utils · nodejs/node@0100fd4

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lib/internal
- crypto
  - random.js
- per_context
  - primordials.js
typings
- primordials.d.ts

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`‎lib/internal/crypto/random.js‎`

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+31-4Lines changed: 31 additions & 4 deletions

Original file line number	Diff line number	Diff line change
`@@ -2,17 +2,22 @@`
`2`	`2`
`3`	`3`	`const {`
`4`	`4`	`Array,`
	`5`	`+ ArrayBufferPrototypeGetByteLength,`
`5`	`6`	`ArrayPrototypeForEach,`
`6`	`7`	`ArrayPrototypePush,`
`7`	`8`	`ArrayPrototypeShift,`
`8`	`9`	`ArrayPrototypeSplice,`
`9`	`10`	`BigInt,`
	`11`	`+ BigIntPrototypeToString,`
	`12`	`+ DataView,`
	`13`	`+ DataViewPrototypeGetUint8,`
`10`	`14`	`FunctionPrototypeBind,`
`11`	`15`	`FunctionPrototypeCall,`
`12`	`16`	`MathMin,`
`13`	`17`	`NumberIsNaN,`
`14`	`18`	`NumberIsSafeInteger,`
`15`	`19`	`NumberPrototypeToString,`
	`20`	`+ StringFromCharCodeApply,`
`16`	`21`	`StringPrototypePadStart,`
`17`	`22`	`} = primordials;`
`18`	`23`
`@@ -493,17 +498,39 @@ function generatePrimeSync(size, options = kEmptyObject) {`
`493`	`498`	`return job.result(prime);`
`494`	`499`	`}`
`495`	`500`
`496`		`-function arrayBufferToUnsignedBigInt(arrayBuffer) {`
`497`		- return BigInt(`0x${Buffer.from(arrayBuffer).toString('hex')}`);
	`501`	`+/**`
	`502`	`+ * 48 is the ASCII code for '0', 97 is the ASCII code for 'a'.`
	`503`	`+ * @param {number} number An integer between 0 and 15.`
	`504`	`+ * @returns {number} corresponding to the ASCII code of the hex representation`
	`505`	`+ * of the parameter.`
	`506`	`+ */`
	`507`	`+const numberToHexCharCode = (number) => (number < 10 ? 48 : 87) + number;`
	`508`	`+`
	`509`	`+/**`
	`510`	`+ * @param {ArrayBuffer} buf An ArrayBuffer.`
	`511`	`+ * @return {bigint}`
	`512`	`+ */`
	`513`	`+function arrayBufferToUnsignedBigInt(buf) {`
	`514`	`+ const length = ArrayBufferPrototypeGetByteLength(buf);`
	`515`	`+ const chars = Array(length * 2);`
	`516`	`+ const view = new DataView(buf);`
	`517`	`+`
	`518`	`+ for (let i = 0; i < length; i++) {`
	`519`	`+ const val = DataViewPrototypeGetUint8(view, i);`
	`520`	`+ chars[2 * i] = numberToHexCharCode(val >> 4);`
	`521`	`+ chars[2 * i + 1] = numberToHexCharCode(val & 0xf);`
	`522`	`+ }`
	`523`	`+`
	`524`	+ return BigInt(`0x${StringFromCharCodeApply(chars)}`);
`498`	`525`	`}`
`499`	`526`
`500`	`527`	`function unsignedBigIntToBuffer(bigint, name) {`
`501`	`528`	`if (bigint < 0) {`
`502`	`529`	`throw new ERR_OUT_OF_RANGE(name, '>= 0', bigint);`
`503`	`530`	`}`
`504`	`531`
`505`		`- const hex = bigint.toString(16);`
`506`		`- const padded = hex.padStart(hex.length + (hex.length % 2), 0);`
	`532`	`+ const hex = BigIntPrototypeToString(bigint, 16);`
	`533`	`+ const padded = StringPrototypePadStart(hex, hex.length + (hex.length % 2), 0);`
`507`	`534`	`return Buffer.from(padded, 'hex');`
`508`	`535`	`}`
`509`	`536`

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`‎lib/internal/per_context/primordials.js‎`

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+2Lines changed: 2 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -45,6 +45,8 @@ const varargsMethods = [`
`45`	`45`	`'MathHypot',`
`46`	`46`	`'MathMax',`
`47`	`47`	`'MathMin',`
	`48`	`+ 'StringFromCharCode',`
	`49`	`+ 'StringFromCodePoint',`
`48`	`50`	`'StringPrototypeConcat',`
`49`	`51`	`'TypedArrayOf',`
`50`	`52`	`];`

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`‎typings/primordials.d.ts‎`

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+2Lines changed: 2 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -422,7 +422,9 @@ declare namespace primordials {`
`422`	`422`	`export const StringName: typeof String.name`
`423`	`423`	`export const StringPrototype: typeof String.prototype`
`424`	`424`	`export const StringFromCharCode: typeof String.fromCharCode`
	`425`	`+ export const StringFromCharCodeApply: StaticApply<typeof String.fromCharCode>`
`425`	`426`	`export const StringFromCodePoint: typeof String.fromCodePoint`
	`427`	`+ export const StringFromCodePointApply: StaticApply<typeof String.fromCodePoint>`
`426`	`428`	`export const StringRaw: typeof String.raw`
`427`	`429`	`export const StringPrototypeAnchor: UncurryThis<typeof String.prototype.anchor>`
`428`	`430`	`export const StringPrototypeBig: UncurryThis<typeof String.prototype.big>`

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