diff --git a/packages/artifact/__tests__/crc64.test.ts b/packages/artifact/__tests__/crc64.test.ts
new file mode 100644
index 0000000000..f5b504fa4a
--- /dev/null
+++ b/packages/artifact/__tests__/crc64.test.ts
@@ -0,0 +1,57 @@
+import CRC64, {CRC64DigestEncoding} from '../src/internal/crc64'
+
+const fixtures = {
+  data:
+    '🚀 👉😎👉 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\nUt enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.\nDuis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.\nExcepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n',
+  expected: {
+    hex: '846CE4ADAD6223ED',
+    base64: '7SNira3kbIQ=',
+    buffer: Buffer.from([0xed, 0x23, 0x62, 0xad, 0xad, 0xe4, 0x6c, 0x84])
+  }
+}
+
+function assertEncodings(crc: CRC64): void {
+  const encodings = Object.keys(fixtures.expected) as CRC64DigestEncoding[]
+  for (const encoding of encodings) {
+    expect(crc.digest(encoding)).toEqual(fixtures.expected[encoding])
+  }
+}
+
+describe('@actions/artifact/src/internal/crc64', () => {
+  it('CRC64 from string', async () => {
+    const crc = new CRC64()
+    crc.update(fixtures.data)
+
+    assertEncodings(crc)
+  })
+
+  it('CRC64 from buffer', async () => {
+    const crc = new CRC64()
+    const buf = Buffer.from(fixtures.data)
+    crc.update(buf)
+
+    assertEncodings(crc)
+  })
+
+  it('CRC64 from split data', async () => {
+    const crc = new CRC64()
+    const splits = fixtures.data.split('\n').slice(0, -1)
+    for (const split of splits) {
+      crc.update(`${split}\n`)
+    }
+
+    assertEncodings(crc)
+  })
+
+  it('flips 64 bits', async () => {
+    const tests = [
+      [BigInt(0), BigInt('0xffffffffffffffff')],
+      [BigInt('0xffffffffffffffff'), BigInt(0)],
+      [BigInt('0xdeadbeef'), BigInt('0xffffffff21524110')]
+    ]
+
+    for (const [input, expected] of tests) {
+      expect(CRC64.flip64Bits(input)).toEqual(expected)
+    }
+  })
+})
diff --git a/packages/artifact/__tests__/util.test.ts b/packages/artifact/__tests__/util.test.ts
index c353cdc60a..a62babba31 100644
--- a/packages/artifact/__tests__/util.test.ts
+++ b/packages/artifact/__tests__/util.test.ts
@@ -10,6 +10,7 @@ import {
   getInitialRetryIntervalInMilliseconds,
   getRetryMultiplier
 } from '../src/internal/config-variables'
+import {Readable} from 'stream'
 
 jest.mock('../src/internal/config-variables')
 
@@ -74,15 +75,20 @@ describe('Utils', () => {
     const size = 24
     const uncompressedLength = 100
     const range = 'bytes 0-199/200'
+    const digest = {
+      crc64: 'bSzITYnW/P8=',
+      md5: 'Xiv1fT9AxLbfadrxk2y3ZvgyN0tPwCWafL/wbi9w8mk='
+    }
     const headers = utils.getUploadHeaders(
       contentType,
       true,
       true,
       uncompressedLength,
       size,
-      range
+      range,
+      digest
     )
-    expect(Object.keys(headers).length).toEqual(8)
+    expect(Object.keys(headers).length).toEqual(10)
     expect(headers['Accept']).toEqual(
       `application/json;api-version=${utils.getApiVersion()}`
     )
@@ -93,6 +99,8 @@ describe('Utils', () => {
     expect(headers['x-tfs-filelength']).toEqual(uncompressedLength)
     expect(headers['Content-Length']).toEqual(size)
     expect(headers['Content-Range']).toEqual(range)
+    expect(headers['x-actions-results-crc64']).toEqual(digest.crc64)
+    expect(headers['x-actions-results-md5']).toEqual(digest.md5)
   })
 
   it('Test constructing upload headers with only required parameter', () => {
@@ -219,4 +227,13 @@ describe('Utils', () => {
     const size2 = (await fs.promises.stat(emptyFile2)).size
     expect(size2).toEqual(0)
   })
+
+  it('Creates a digest from a readable stream', async () => {
+    const data = 'lorem ipsum'
+    const stream = Readable.from(data)
+    const digest = await utils.digestForStream(stream)
+
+    expect(digest.crc64).toBe('bSzITYnW/P8=')
+    expect(digest.md5).toBe('gKdR/eV3AoZAxBkADjPrpg==')
+  })
 })
diff --git a/packages/artifact/src/internal/crc64.ts b/packages/artifact/src/internal/crc64.ts
new file mode 100644
index 0000000000..452a828663
--- /dev/null
+++ b/packages/artifact/src/internal/crc64.ts
@@ -0,0 +1,317 @@
+/**
+ * CRC64: cyclic redundancy check, 64-bits
+ *
+ * In order to validate that artifacts are not being corrupted over the wire, this redundancy check allows us to
+ * validate that there was no corruption during transmission. The implementation here is based on Go's hash/crc64 pkg,
+ * but without the slicing-by-8 optimization: https://cs.opensource.google/go/go/+/master:src/hash/crc64/crc64.go
+ *
+ * This implementation uses a pregenerated table based on 0x9A6C9329AC4BC9B5 as the polynomial, the same polynomial that
+ * is used for Azure Storage: https://github.com/Azure/azure-storage-net/blob/cbe605f9faa01bfc3003d75fc5a16b2eaccfe102/Lib/Common/Core/Util/Crc64.cs#L27
+ */
+
+// when transpile target is >= ES2020 (after dropping node 12) these can be changed to bigint literals - ts(2737)
+const PREGEN_POLY_TABLE = [
+  BigInt('0x0000000000000000'),
+  BigInt('0x7F6EF0C830358979'),
+  BigInt('0xFEDDE190606B12F2'),
+  BigInt('0x81B31158505E9B8B'),
+  BigInt('0xC962E5739841B68F'),
+  BigInt('0xB60C15BBA8743FF6'),
+  BigInt('0x37BF04E3F82AA47D'),
+  BigInt('0x48D1F42BC81F2D04'),
+  BigInt('0xA61CECB46814FE75'),
+  BigInt('0xD9721C7C5821770C'),
+  BigInt('0x58C10D24087FEC87'),
+  BigInt('0x27AFFDEC384A65FE'),
+  BigInt('0x6F7E09C7F05548FA'),
+  BigInt('0x1010F90FC060C183'),
+  BigInt('0x91A3E857903E5A08'),
+  BigInt('0xEECD189FA00BD371'),
+  BigInt('0x78E0FF3B88BE6F81'),
+  BigInt('0x078E0FF3B88BE6F8'),
+  BigInt('0x863D1EABE8D57D73'),
+  BigInt('0xF953EE63D8E0F40A'),
+  BigInt('0xB1821A4810FFD90E'),
+  BigInt('0xCEECEA8020CA5077'),
+  BigInt('0x4F5FFBD87094CBFC'),
+  BigInt('0x30310B1040A14285'),
+  BigInt('0xDEFC138FE0AA91F4'),
+  BigInt('0xA192E347D09F188D'),
+  BigInt('0x2021F21F80C18306'),
+  BigInt('0x5F4F02D7B0F40A7F'),
+  BigInt('0x179EF6FC78EB277B'),
+  BigInt('0x68F0063448DEAE02'),
+  BigInt('0xE943176C18803589'),
+  BigInt('0x962DE7A428B5BCF0'),
+  BigInt('0xF1C1FE77117CDF02'),
+  BigInt('0x8EAF0EBF2149567B'),
+  BigInt('0x0F1C1FE77117CDF0'),
+  BigInt('0x7072EF2F41224489'),
+  BigInt('0x38A31B04893D698D'),
+  BigInt('0x47CDEBCCB908E0F4'),
+  BigInt('0xC67EFA94E9567B7F'),
+  BigInt('0xB9100A5CD963F206'),
+  BigInt('0x57DD12C379682177'),
+  BigInt('0x28B3E20B495DA80E'),
+  BigInt('0xA900F35319033385'),
+  BigInt('0xD66E039B2936BAFC'),
+  BigInt('0x9EBFF7B0E12997F8'),
+  BigInt('0xE1D10778D11C1E81'),
+  BigInt('0x606216208142850A'),
+  BigInt('0x1F0CE6E8B1770C73'),
+  BigInt('0x8921014C99C2B083'),
+  BigInt('0xF64FF184A9F739FA'),
+  BigInt('0x77FCE0DCF9A9A271'),
+  BigInt('0x08921014C99C2B08'),
+  BigInt('0x4043E43F0183060C'),
+  BigInt('0x3F2D14F731B68F75'),
+  BigInt('0xBE9E05AF61E814FE'),
+  BigInt('0xC1F0F56751DD9D87'),
+  BigInt('0x2F3DEDF8F1D64EF6'),
+  BigInt('0x50531D30C1E3C78F'),
+  BigInt('0xD1E00C6891BD5C04'),
+  BigInt('0xAE8EFCA0A188D57D'),
+  BigInt('0xE65F088B6997F879'),
+  BigInt('0x9931F84359A27100'),
+  BigInt('0x1882E91B09FCEA8B'),
+  BigInt('0x67EC19D339C963F2'),
+  BigInt('0xD75ADABD7A6E2D6F'),
+  BigInt('0xA8342A754A5BA416'),
+  BigInt('0x29873B2D1A053F9D'),
+  BigInt('0x56E9CBE52A30B6E4'),
+  BigInt('0x1E383FCEE22F9BE0'),
+  BigInt('0x6156CF06D21A1299'),
+  BigInt('0xE0E5DE5E82448912'),
+  BigInt('0x9F8B2E96B271006B'),
+  BigInt('0x71463609127AD31A'),
+  BigInt('0x0E28C6C1224F5A63'),
+  BigInt('0x8F9BD7997211C1E8'),
+  BigInt('0xF0F5275142244891'),
+  BigInt('0xB824D37A8A3B6595'),
+  BigInt('0xC74A23B2BA0EECEC'),
+  BigInt('0x46F932EAEA507767'),
+  BigInt('0x3997C222DA65FE1E'),
+  BigInt('0xAFBA2586F2D042EE'),
+  BigInt('0xD0D4D54EC2E5CB97'),
+  BigInt('0x5167C41692BB501C'),
+  BigInt('0x2E0934DEA28ED965'),
+  BigInt('0x66D8C0F56A91F461'),
+  BigInt('0x19B6303D5AA47D18'),
+  BigInt('0x980521650AFAE693'),
+  BigInt('0xE76BD1AD3ACF6FEA'),
+  BigInt('0x09A6C9329AC4BC9B'),
+  BigInt('0x76C839FAAAF135E2'),
+  BigInt('0xF77B28A2FAAFAE69'),
+  BigInt('0x8815D86ACA9A2710'),
+  BigInt('0xC0C42C4102850A14'),
+  BigInt('0xBFAADC8932B0836D'),
+  BigInt('0x3E19CDD162EE18E6'),
+  BigInt('0x41773D1952DB919F'),
+  BigInt('0x269B24CA6B12F26D'),
+  BigInt('0x59F5D4025B277B14'),
+  BigInt('0xD846C55A0B79E09F'),
+  BigInt('0xA72835923B4C69E6'),
+  BigInt('0xEFF9C1B9F35344E2'),
+  BigInt('0x90973171C366CD9B'),
+  BigInt('0x1124202993385610'),
+  BigInt('0x6E4AD0E1A30DDF69'),
+  BigInt('0x8087C87E03060C18'),
+  BigInt('0xFFE938B633338561'),
+  BigInt('0x7E5A29EE636D1EEA'),
+  BigInt('0x0134D92653589793'),
+  BigInt('0x49E52D0D9B47BA97'),
+  BigInt('0x368BDDC5AB7233EE'),
+  BigInt('0xB738CC9DFB2CA865'),
+  BigInt('0xC8563C55CB19211C'),
+  BigInt('0x5E7BDBF1E3AC9DEC'),
+  BigInt('0x21152B39D3991495'),
+  BigInt('0xA0A63A6183C78F1E'),
+  BigInt('0xDFC8CAA9B3F20667'),
+  BigInt('0x97193E827BED2B63'),
+  BigInt('0xE877CE4A4BD8A21A'),
+  BigInt('0x69C4DF121B863991'),
+  BigInt('0x16AA2FDA2BB3B0E8'),
+  BigInt('0xF86737458BB86399'),
+  BigInt('0x8709C78DBB8DEAE0'),
+  BigInt('0x06BAD6D5EBD3716B'),
+  BigInt('0x79D4261DDBE6F812'),
+  BigInt('0x3105D23613F9D516'),
+  BigInt('0x4E6B22FE23CC5C6F'),
+  BigInt('0xCFD833A67392C7E4'),
+  BigInt('0xB0B6C36E43A74E9D'),
+  BigInt('0x9A6C9329AC4BC9B5'),
+  BigInt('0xE50263E19C7E40CC'),
+  BigInt('0x64B172B9CC20DB47'),
+  BigInt('0x1BDF8271FC15523E'),
+  BigInt('0x530E765A340A7F3A'),
+  BigInt('0x2C608692043FF643'),
+  BigInt('0xADD397CA54616DC8'),
+  BigInt('0xD2BD67026454E4B1'),
+  BigInt('0x3C707F9DC45F37C0'),
+  BigInt('0x431E8F55F46ABEB9'),
+  BigInt('0xC2AD9E0DA4342532'),
+  BigInt('0xBDC36EC59401AC4B'),
+  BigInt('0xF5129AEE5C1E814F'),
+  BigInt('0x8A7C6A266C2B0836'),
+  BigInt('0x0BCF7B7E3C7593BD'),
+  BigInt('0x74A18BB60C401AC4'),
+  BigInt('0xE28C6C1224F5A634'),
+  BigInt('0x9DE29CDA14C02F4D'),
+  BigInt('0x1C518D82449EB4C6'),
+  BigInt('0x633F7D4A74AB3DBF'),
+  BigInt('0x2BEE8961BCB410BB'),
+  BigInt('0x548079A98C8199C2'),
+  BigInt('0xD53368F1DCDF0249'),
+  BigInt('0xAA5D9839ECEA8B30'),
+  BigInt('0x449080A64CE15841'),
+  BigInt('0x3BFE706E7CD4D138'),
+  BigInt('0xBA4D61362C8A4AB3'),
+  BigInt('0xC52391FE1CBFC3CA'),
+  BigInt('0x8DF265D5D4A0EECE'),
+  BigInt('0xF29C951DE49567B7'),
+  BigInt('0x732F8445B4CBFC3C'),
+  BigInt('0x0C41748D84FE7545'),
+  BigInt('0x6BAD6D5EBD3716B7'),
+  BigInt('0x14C39D968D029FCE'),
+  BigInt('0x95708CCEDD5C0445'),
+  BigInt('0xEA1E7C06ED698D3C'),
+  BigInt('0xA2CF882D2576A038'),
+  BigInt('0xDDA178E515432941'),
+  BigInt('0x5C1269BD451DB2CA'),
+  BigInt('0x237C997575283BB3'),
+  BigInt('0xCDB181EAD523E8C2'),
+  BigInt('0xB2DF7122E51661BB'),
+  BigInt('0x336C607AB548FA30'),
+  BigInt('0x4C0290B2857D7349'),
+  BigInt('0x04D364994D625E4D'),
+  BigInt('0x7BBD94517D57D734'),
+  BigInt('0xFA0E85092D094CBF'),
+  BigInt('0x856075C11D3CC5C6'),
+  BigInt('0x134D926535897936'),
+  BigInt('0x6C2362AD05BCF04F'),
+  BigInt('0xED9073F555E26BC4'),
+  BigInt('0x92FE833D65D7E2BD'),
+  BigInt('0xDA2F7716ADC8CFB9'),
+  BigInt('0xA54187DE9DFD46C0'),
+  BigInt('0x24F29686CDA3DD4B'),
+  BigInt('0x5B9C664EFD965432'),
+  BigInt('0xB5517ED15D9D8743'),
+  BigInt('0xCA3F8E196DA80E3A'),
+  BigInt('0x4B8C9F413DF695B1'),
+  BigInt('0x34E26F890DC31CC8'),
+  BigInt('0x7C339BA2C5DC31CC'),
+  BigInt('0x035D6B6AF5E9B8B5'),
+  BigInt('0x82EE7A32A5B7233E'),
+  BigInt('0xFD808AFA9582AA47'),
+  BigInt('0x4D364994D625E4DA'),
+  BigInt('0x3258B95CE6106DA3'),
+  BigInt('0xB3EBA804B64EF628'),
+  BigInt('0xCC8558CC867B7F51'),
+  BigInt('0x8454ACE74E645255'),
+  BigInt('0xFB3A5C2F7E51DB2C'),
+  BigInt('0x7A894D772E0F40A7'),
+  BigInt('0x05E7BDBF1E3AC9DE'),
+  BigInt('0xEB2AA520BE311AAF'),
+  BigInt('0x944455E88E0493D6'),
+  BigInt('0x15F744B0DE5A085D'),
+  BigInt('0x6A99B478EE6F8124'),
+  BigInt('0x224840532670AC20'),
+  BigInt('0x5D26B09B16452559'),
+  BigInt('0xDC95A1C3461BBED2'),
+  BigInt('0xA3FB510B762E37AB'),
+  BigInt('0x35D6B6AF5E9B8B5B'),
+  BigInt('0x4AB846676EAE0222'),
+  BigInt('0xCB0B573F3EF099A9'),
+  BigInt('0xB465A7F70EC510D0'),
+  BigInt('0xFCB453DCC6DA3DD4'),
+  BigInt('0x83DAA314F6EFB4AD'),
+  BigInt('0x0269B24CA6B12F26'),
+  BigInt('0x7D0742849684A65F'),
+  BigInt('0x93CA5A1B368F752E'),
+  BigInt('0xECA4AAD306BAFC57'),
+  BigInt('0x6D17BB8B56E467DC'),
+  BigInt('0x12794B4366D1EEA5'),
+  BigInt('0x5AA8BF68AECEC3A1'),
+  BigInt('0x25C64FA09EFB4AD8'),
+  BigInt('0xA4755EF8CEA5D153'),
+  BigInt('0xDB1BAE30FE90582A'),
+  BigInt('0xBCF7B7E3C7593BD8'),
+  BigInt('0xC399472BF76CB2A1'),
+  BigInt('0x422A5673A732292A'),
+  BigInt('0x3D44A6BB9707A053'),
+  BigInt('0x759552905F188D57'),
+  BigInt('0x0AFBA2586F2D042E'),
+  BigInt('0x8B48B3003F739FA5'),
+  BigInt('0xF42643C80F4616DC'),
+  BigInt('0x1AEB5B57AF4DC5AD'),
+  BigInt('0x6585AB9F9F784CD4'),
+  BigInt('0xE436BAC7CF26D75F'),
+  BigInt('0x9B584A0FFF135E26'),
+  BigInt('0xD389BE24370C7322'),
+  BigInt('0xACE74EEC0739FA5B'),
+  BigInt('0x2D545FB4576761D0'),
+  BigInt('0x523AAF7C6752E8A9'),
+  BigInt('0xC41748D84FE75459'),
+  BigInt('0xBB79B8107FD2DD20'),
+  BigInt('0x3ACAA9482F8C46AB'),
+  BigInt('0x45A459801FB9CFD2'),
+  BigInt('0x0D75ADABD7A6E2D6'),
+  BigInt('0x721B5D63E7936BAF'),
+  BigInt('0xF3A84C3BB7CDF024'),
+  BigInt('0x8CC6BCF387F8795D'),
+  BigInt('0x620BA46C27F3AA2C'),
+  BigInt('0x1D6554A417C62355'),
+  BigInt('0x9CD645FC4798B8DE'),
+  BigInt('0xE3B8B53477AD31A7'),
+  BigInt('0xAB69411FBFB21CA3'),
+  BigInt('0xD407B1D78F8795DA'),
+  BigInt('0x55B4A08FDFD90E51'),
+  BigInt('0x2ADA5047EFEC8728')
+]
+
+export type CRC64DigestEncoding = 'hex' | 'base64' | 'buffer'
+
+class CRC64 {
+  private _crc: bigint
+
+  constructor() {
+    this._crc = BigInt(0)
+  }
+
+  update(data: Buffer | string): void {
+    const buffer = typeof data === 'string' ? Buffer.from(data) : data
+    let crc = CRC64.flip64Bits(this._crc)
+
+    for (const dataByte of buffer) {
+      const crcByte = Number(crc & BigInt(0xff))
+      crc = PREGEN_POLY_TABLE[crcByte ^ dataByte] ^ (crc >> BigInt(8))
+    }
+
+    this._crc = CRC64.flip64Bits(crc)
+  }
+
+  digest(encoding?: CRC64DigestEncoding): string | Buffer {
+    switch (encoding) {
+      case 'hex':
+        return this._crc.toString(16).toUpperCase()
+      case 'base64':
+        return this.toBuffer().toString('base64')
+      default:
+        return this.toBuffer()
+    }
+  }
+
+  private toBuffer(): Buffer {
+    return Buffer.from(
+      [0, 8, 16, 24, 32, 40, 48, 56].map(s =>
+        Number((this._crc >> BigInt(s)) & BigInt(0xff))
+      )
+    )
+  }
+
+  static flip64Bits(n: bigint): bigint {
+    return (BigInt(1) << BigInt(64)) - BigInt(1) - n
+  }
+}
+
+export default CRC64
diff --git a/packages/artifact/src/internal/upload-http-client.ts b/packages/artifact/src/internal/upload-http-client.ts
index 180466e78f..67b3bf6daf 100644
--- a/packages/artifact/src/internal/upload-http-client.ts
+++ b/packages/artifact/src/internal/upload-http-client.ts
@@ -9,6 +9,7 @@ import {
   UploadResults
 } from './contracts'
 import {
+  digestForStream,
   getArtifactUrl,
   getContentRange,
   getUploadHeaders,
@@ -405,6 +406,9 @@ export class UploadHttpClient {
     isGzip: boolean,
     totalFileSize: number
   ): Promise<boolean> {
+    // open a new stream and read it to compute the digest
+    const digest = await digestForStream(openStream())
+
     // prepare all the necessary headers before making any http call
     const headers = getUploadHeaders(
       'application/octet-stream',
@@ -412,7 +416,8 @@ export class UploadHttpClient {
       isGzip,
       totalFileSize,
       end - start + 1,
-      getContentRange(start, end, uploadFileSize)
+      getContentRange(start, end, uploadFileSize),
+      digest
     )
 
     const uploadChunkRequest = async (): Promise<HttpClientResponse> => {
diff --git a/packages/artifact/src/internal/utils.ts b/packages/artifact/src/internal/utils.ts
index 2f2883e7ac..cb5a92249a 100644
--- a/packages/artifact/src/internal/utils.ts
+++ b/packages/artifact/src/internal/utils.ts
@@ -1,3 +1,4 @@
+import crypto from 'crypto'
 import {promises as fs} from 'fs'
 import {IncomingHttpHeaders, OutgoingHttpHeaders} from 'http'
 import {debug, info, warning} from '@actions/core'
@@ -10,6 +11,7 @@ import {
   getRetryMultiplier,
   getInitialRetryIntervalInMilliseconds
 } from './config-variables'
+import CRC64 from './crc64'
 
 /**
  * Returns a retry time in milliseconds that exponentially gets larger
@@ -179,7 +181,8 @@ export function getUploadHeaders(
   isGzip?: boolean,
   uncompressedLength?: number,
   contentLength?: number,
-  contentRange?: string
+  contentRange?: string,
+  digest?: StreamDigest
 ): OutgoingHttpHeaders {
   const requestOptions: OutgoingHttpHeaders = {}
   requestOptions['Accept'] = `application/json;api-version=${getApiVersion()}`
@@ -201,6 +204,10 @@ export function getUploadHeaders(
   if (contentRange) {
     requestOptions['Content-Range'] = contentRange
   }
+  if (digest) {
+    requestOptions['x-actions-results-crc64'] = digest.crc64
+    requestOptions['x-actions-results-md5'] = digest.md5
+  }
 
   return requestOptions
 }
@@ -290,3 +297,29 @@ export function getProperRetention(
 export async function sleep(milliseconds: number): Promise<void> {
   return new Promise(resolve => setTimeout(resolve, milliseconds))
 }
+
+export interface StreamDigest {
+  crc64: string
+  md5: string
+}
+
+export async function digestForStream(
+  stream: NodeJS.ReadableStream
+): Promise<StreamDigest> {
+  return new Promise((resolve, reject) => {
+    const crc64 = new CRC64()
+    const md5 = crypto.createHash('md5')
+    stream
+      .on('data', data => {
+        crc64.update(data)
+        md5.update(data)
+      })
+      .on('end', () =>
+        resolve({
+          crc64: crc64.digest('base64') as string,
+          md5: md5.digest('base64')
+        })
+      )
+      .on('error', reject)
+  })
+}