commit 804894520c9b9fdccf298138f2cdd2b9bd2fdf4e · edouard.paris/did-method-plc

+21 -2
packages/server/src/constraints.ts
···

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       import { DAY, HOUR, cborEncode } from '@atproto/common'

     

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       import * as plc from '@did-plc/lib'

     

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       import { ServerError } from './error'

     

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       -
       import { extractMultikey, parseDidKey } from '@atproto/crypto'

     

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       import {

     

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         extractPrefixedBytes,

     

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         extractMultikey,

     

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         parseDidKey,

     

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       } from '@atproto/crypto'

     

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       const MAX_OP_BYTES = 4000

     

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       const MAX_AKA_ENTRIES = 10

     
···

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       const MAX_SERVICE_ENTRIES = 10

     

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       const MAX_SERVICE_TYPE_LENGTH = 256

     

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       const MAX_SERVICE_ENDPOINT_LENGTH = 512

     

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       const MAX_VERIF_METHOD_ENTRIES = 10

     

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       const MAX_ID_LENGTH = 32

     

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       const MAX_DID_KEY_LENGTH = 256 // k256 = 57, BLS12-381 = 143

     

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       export function validateIncomingOp(input: unknown): plc.OpOrTombstone {

     

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         const byteLength = cborEncode(input).byteLength

     
···

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           }

     

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         }

     

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         const verifyMethods = Object.entries(op.verificationMethods)

     

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         if (verifyMethods.length > MAX_VERIF_METHOD_ENTRIES) {

     

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           throw new ServerError(

     

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             400,

     

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             `Too many Verification Method entries (max ${MAX_VERIF_METHOD_ENTRIES})`,

     

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           )

     

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         }

     

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         for (const [id, key] of verifyMethods) {

     

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           if (id.length > MAX_ID_LENGTH) {

     

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             throw new ServerError(

     
···

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               `Verification Method id too long (max ${MAX_ID_LENGTH}): ${id}`,

     

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             )

     

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           }

     

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           if (key.length > MAX_DID_KEY_LENGTH) {

     

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             throw new ServerError(

     

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               400,

     

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               `Verification Method key too long (max ${MAX_DID_KEY_LENGTH}): ${id}`,

     

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             )

     

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           }

     

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           try {

     

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             // perform only minimal did:key syntax checking, with no restrictions on

     

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             // key types

     

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             extractMultikey(key)

     

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             const multikey = extractMultikey(key) // enforces did:key: prefix

     

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             extractPrefixedBytes(multikey) // enforces base58-btc encoding

     

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           } catch (err) {

     

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             throw new ServerError(400, `Invalid verificationMethod key: ${key}`)

     

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           }