}

  /** Returns a hash function implementing the SHA-256 algorithm (256 hash bits). */
  public static HashFunction sha256() {
    return Sha256Holder.SHA_256;
  }

  private static final class Sha256Holder {
    static final HashFunction SHA_256 =
        new MessageDigestHashFunction("SHA-256", "Hashing.sha256()");
  }

  /**
   * Returns a hash function implementing the SHA-384 algorithm (384 hash bits).
   *

  }

  @Test fun testGoodPin() {
    val pin =
      Pin(
        "**.example.co.uk",
        "sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
      )
    assertEquals("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=".decodeBase64(), pin.hash)
    assertEquals("sha256", pin.hashAlgorithm)
    assertEquals("**.example.co.uk", pin.pattern)
    assertTrue(pin.matchesHostname("www.example.co.uk"))

import okhttp3.Request

class CertificatePinning {
  private val client =
    OkHttpClient
      .Builder()
      .certificatePinner(
        CertificatePinner
          .Builder()
          .add("publicobject.com", "sha256/Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys=")
          .build(),
      ).build()

  fun run() {
    val request =
      Request
        .Builder()
        .url("https://publicobject.com/robots.txt")

      val buffer = Buffer()
      requestBody.writeTo(buffer)
      assertThat(buffer.readUtf8()).isEqualTo("Hello")
    }
  }

  @Test
  fun testSha256() {
    val hash = "Hello".toRequestBody().sha256().hex()
    assertThat(hash).isEqualTo("185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969")
  }

  private inline fun <T> assertOnFileDescriptor(
    content: String? = null,

  and then all the bookmark names and hashes.
  Tags are stored in .hgtags files in any of the branches,
  so the branch metadata includes the tags as well.
  """
  h = hashlib.sha256()
  peer = hg.peer(ui, {}, url)
  for name, revs in peer.branchmap().items():
    h.update(name)
    for r in revs:
      h.update(b' ')
      h.update(r)
    h.update(b'\n')

## Downloads for v1.10.8


filename | sha256 hash
-------- | -----------
[kubernetes.tar.gz](https://dl.k8s.io/v1.10.8/kubernetes.tar.gz) | `8af88c2aa340fd4801e39374572e4e4b876b0c723327fe32286bb4a0b3f5c1fd`
[kubernetes-src.tar.gz](https://dl.k8s.io/v1.10.8/kubernetes-src.tar.gz) | `23e5e78b3d96c7acf955bedb38d0d2f03e5d70f9a263d3e571689b12fc90fd5b`

### Client Binaries

filename | sha256 hash
-------- | -----------

public final class CertificatePinning {
  private final OkHttpClient client = new OkHttpClient.Builder()
      .certificatePinner(
          new CertificatePinner.Builder()
              .add("publicobject.com", "sha256/Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys=")
              .build())
      .build();

  public void run() throws Exception {
    Request request = new Request.Builder()

	kexAlgoDH14SHA256             = "diffie-hellman-group14-sha256"
	kexAlgoDH16SHA512             = "diffie-hellman-group16-sha512"
	kexAlgoECDH256                = "ecdh-sha2-nistp256"
	kexAlgoECDH384                = "ecdh-sha2-nistp384"
	kexAlgoECDH521                = "ecdh-sha2-nistp521"
	kexAlgoCurve25519SHA256LibSSH = "curve25519-sha256@libssh.org"
	kexAlgoCurve25519SHA256       = "curve25519-sha256"

	// Object date/time of expiration
	AmzExpiration = "x-amz-expiration"

	// Dummy putBucketACL
	AmzACL = "x-amz-acl"

	// Signature V4 related constants.
	AmzContentSha256        = "X-Amz-Content-Sha256"
	AmzDate                 = "X-Amz-Date"
	AmzAlgorithm            = "X-Amz-Algorithm"
	AmzExpires              = "X-Amz-Expires"
	AmzSignedHeaders        = "X-Amz-SignedHeaders"

	expError  error
}{
	{file: "myobject", offset: 0, length: 100, algorithm: SHA256, expError: nil},                // 0
	{file: "myobject", offset: 25, length: 74, algorithm: SHA256, expError: nil},                // 1
	{file: "myobject", offset: 29, length: 70, algorithm: SHA256, expError: nil},                // 2
	{file: "myobject", offset: 100, length: 0, algorithm: SHA256, expError: nil},                // 3