diff --git a/crypto/cipher/aead_test.c b/crypto/cipher/aead_test.c
index 33e260a..833efa4 100644
--- a/crypto/cipher/aead_test.c
+++ b/crypto/cipher/aead_test.c
@@ -251,6 +251,10 @@
     aead = EVP_aead_aes_128_key_wrap();
   } else if (strcmp(argv[1], "aes-256-key-wrap") == 0) {
     aead = EVP_aead_aes_256_key_wrap();
+  } else if (strcmp(argv[1], "aes-128-ctr-hmac-sha256") == 0) {
+    aead = EVP_aead_aes_128_ctr_hmac_sha256();
+  } else if (strcmp(argv[1], "aes-256-ctr-hmac-sha256") == 0) {
+    aead = EVP_aead_aes_256_ctr_hmac_sha256();
   } else {
     fprintf(stderr, "Unknown AEAD: %s\n", argv[1]);
     return 2;
diff --git a/crypto/cipher/e_aes.c b/crypto/cipher/e_aes.c
index 47b8320..21f4065 100644
--- a/crypto/cipher/e_aes.c
+++ b/crypto/cipher/e_aes.c
@@ -57,8 +57,10 @@
 #include <openssl/modes.h>
 #include <openssl/obj.h>
 #include <openssl/rand.h>
+#include <openssl/sha.h>
 
 #include "internal.h"
+#include "../internal.h"
 #include "../modes/internal.h"
 
 #if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
@@ -1396,6 +1398,283 @@
 
 const EVP_AEAD *EVP_aead_aes_256_key_wrap(void) { return &aead_aes_256_key_wrap; }
 
+
+#define EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN SHA256_DIGEST_LENGTH
+#define EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN 12
+
+struct aead_aes_ctr_hmac_sha256_ctx {
+  union {
+    double align;
+    AES_KEY ks;
+  } ks;
+  ctr128_f ctr;
+  block128_f block;
+  SHA256_CTX inner_init_state;
+  SHA256_CTX outer_init_state;
+  uint8_t tag_len;
+};
+
+static void hmac_init(SHA256_CTX *out_inner, SHA256_CTX *out_outer,
+                      const uint8_t hmac_key[32]) {
+  static const size_t hmac_key_len = 32;
+  uint8_t block[SHA256_CBLOCK];
+  memcpy(block, hmac_key, hmac_key_len);
+  memset(block + hmac_key_len, 0x36, sizeof(block) - hmac_key_len);
+
+  unsigned i;
+  for (i = 0; i < hmac_key_len; i++) {
+    block[i] ^= 0x36;
+  }
+
+  SHA256_Init(out_inner);
+  SHA256_Update(out_inner, block, sizeof(block));
+
+  memset(block + hmac_key_len, 0x5c, sizeof(block) - hmac_key_len);
+  for (i = 0; i < hmac_key_len; i++) {
+    block[i] ^= (0x36 ^ 0x5c);
+  }
+
+  SHA256_Init(out_outer);
+  SHA256_Update(out_outer, block, sizeof(block));
+}
+
+static int aead_aes_ctr_hmac_sha256_init(EVP_AEAD_CTX *ctx, const uint8_t *key,
+                                         size_t key_len, size_t tag_len) {
+  struct aead_aes_ctr_hmac_sha256_ctx *aes_ctx;
+  static const size_t hmac_key_len = 32;
+
+  if (key_len < hmac_key_len) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_init,
+                      CIPHER_R_BAD_KEY_LENGTH);
+    return 0; /* EVP_AEAD_CTX_init should catch this. */
+  }
+
+  const size_t aes_key_len = key_len - hmac_key_len;
+  if (aes_key_len != 16 && aes_key_len != 32) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_init,
+                      CIPHER_R_BAD_KEY_LENGTH);
+    return 0; /* EVP_AEAD_CTX_init should catch this. */
+  }
+
+  if (tag_len == EVP_AEAD_DEFAULT_TAG_LENGTH) {
+    tag_len = EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN;
+  }
+
+  if (tag_len > EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_init,
+                      CIPHER_R_TAG_TOO_LARGE);
+    return 0;
+  }
+
+  aes_ctx = OPENSSL_malloc(sizeof(struct aead_aes_ctr_hmac_sha256_ctx));
+  if (aes_ctx == NULL) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_init,
+                      ERR_R_MALLOC_FAILURE);
+    return 0;
+  }
+
+  aes_ctx->ctr =
+      aes_ctr_set_key(&aes_ctx->ks.ks, NULL, &aes_ctx->block, key, aes_key_len);
+  aes_ctx->tag_len = tag_len;
+  hmac_init(&aes_ctx->inner_init_state, &aes_ctx->outer_init_state,
+            key + aes_key_len);
+
+  ctx->aead_state = aes_ctx;
+
+  return 1;
+}
+
+static void aead_aes_ctr_hmac_sha256_cleanup(EVP_AEAD_CTX *ctx) {
+  struct aead_aes_ctr_hmac_sha256_ctx *aes_ctx = ctx->aead_state;
+  OPENSSL_cleanse(aes_ctx, sizeof(struct aead_aes_ctr_hmac_sha256_ctx));
+  OPENSSL_free(aes_ctx);
+}
+
+static void hmac_update_uint64(SHA256_CTX *sha256, uint64_t value) {
+  unsigned i;
+  uint8_t bytes[8];
+
+  for (i = 0; i < sizeof(bytes); i++) {
+    bytes[i] = value & 0xff;
+    value >>= 8;
+  }
+  SHA256_Update(sha256, bytes, sizeof(bytes));
+}
+
+static void hmac_calculate(uint8_t out[SHA256_DIGEST_LENGTH],
+                           const SHA256_CTX *inner_init_state,
+                           const SHA256_CTX *outer_init_state,
+                           const uint8_t *ad, size_t ad_len,
+                           const uint8_t *nonce, const uint8_t *ciphertext,
+                           size_t ciphertext_len) {
+  SHA256_CTX sha256;
+  memcpy(&sha256, inner_init_state, sizeof(sha256));
+  hmac_update_uint64(&sha256, ad_len);
+  hmac_update_uint64(&sha256, ciphertext_len);
+  SHA256_Update(&sha256, nonce, EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN);
+  SHA256_Update(&sha256, ad, ad_len);
+
+  /* Pad with zeros to the end of the SHA-256 block. */
+  const unsigned num_padding =
+      (SHA256_CBLOCK - ((sizeof(uint64_t)*2 +
+                         EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN + ad_len) %
+                        SHA256_CBLOCK)) %
+      SHA256_CBLOCK;
+  uint8_t padding[SHA256_CBLOCK];
+  memset(padding, 0, num_padding);
+  SHA256_Update(&sha256, padding, num_padding);
+
+  SHA256_Update(&sha256, ciphertext, ciphertext_len);
+
+  uint8_t inner_digest[SHA256_DIGEST_LENGTH];
+  SHA256_Final(inner_digest, &sha256);
+
+  memcpy(&sha256, outer_init_state, sizeof(sha256));
+  SHA256_Update(&sha256, inner_digest, sizeof(inner_digest));
+  SHA256_Final(out, &sha256);
+}
+
+static void aead_aes_ctr_hmac_sha256_crypt(
+    const struct aead_aes_ctr_hmac_sha256_ctx *aes_ctx, uint8_t *out,
+    const uint8_t *in, size_t len, const uint8_t *nonce) {
+  /* Since the AEAD operation is one-shot, keeping a buffer of unused keystream
+   * bytes is pointless. However, |CRYPTO_ctr128_encrypt| requires it. */
+  uint8_t partial_block_buffer[AES_BLOCK_SIZE];
+  unsigned partial_block_offset = 0;
+  memset(partial_block_buffer, 0, sizeof(partial_block_buffer));
+
+  uint8_t counter[AES_BLOCK_SIZE];
+  memcpy(counter, nonce, EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN);
+  memset(counter + EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN, 0, 4);
+
+  if (aes_ctx->ctr) {
+    CRYPTO_ctr128_encrypt_ctr32(in, out, len, &aes_ctx->ks.ks, counter,
+                                partial_block_buffer, &partial_block_offset,
+                                aes_ctx->ctr);
+  } else {
+    CRYPTO_ctr128_encrypt(in, out, len, &aes_ctx->ks.ks, counter,
+                          partial_block_buffer, &partial_block_offset,
+                          aes_ctx->block);
+  }
+}
+
+static int aead_aes_ctr_hmac_sha256_seal(const EVP_AEAD_CTX *ctx, uint8_t *out,
+                                         size_t *out_len, size_t max_out_len,
+                                         const uint8_t *nonce, size_t nonce_len,
+                                         const uint8_t *in, size_t in_len,
+                                         const uint8_t *ad, size_t ad_len) {
+  const struct aead_aes_ctr_hmac_sha256_ctx *aes_ctx = ctx->aead_state;
+  const uint64_t in_len_64 = in_len;
+
+  if (in_len + aes_ctx->tag_len < in_len ||
+      /* This input is so large it would overflow the 32-bit block counter. */
+      in_len_64 >= (OPENSSL_U64(1) << 32) * AES_BLOCK_SIZE) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_seal,
+                      CIPHER_R_TOO_LARGE);
+    return 0;
+  }
+
+  if (max_out_len < in_len + aes_ctx->tag_len) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_seal,
+                      CIPHER_R_BUFFER_TOO_SMALL);
+    return 0;
+  }
+
+  if (nonce_len != EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_seal,
+                      CIPHER_R_UNSUPPORTED_NONCE_SIZE);
+    return 0;
+  }
+
+  aead_aes_ctr_hmac_sha256_crypt(aes_ctx, out, in, in_len, nonce);
+
+  uint8_t hmac_result[SHA256_DIGEST_LENGTH];
+  hmac_calculate(hmac_result, &aes_ctx->inner_init_state,
+                 &aes_ctx->outer_init_state, ad, ad_len, nonce, out, in_len);
+  memcpy(out + in_len, hmac_result, aes_ctx->tag_len);
+  *out_len = in_len + aes_ctx->tag_len;
+
+  return 1;
+}
+
+static int aead_aes_ctr_hmac_sha256_open(const EVP_AEAD_CTX *ctx, uint8_t *out,
+                                         size_t *out_len, size_t max_out_len,
+                                         const uint8_t *nonce, size_t nonce_len,
+                                         const uint8_t *in, size_t in_len,
+                                         const uint8_t *ad, size_t ad_len) {
+  const struct aead_aes_ctr_hmac_sha256_ctx *aes_ctx = ctx->aead_state;
+  size_t plaintext_len;
+
+  if (in_len < aes_ctx->tag_len) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_open,
+                      CIPHER_R_BAD_DECRYPT);
+    return 0;
+  }
+
+  plaintext_len = in_len - aes_ctx->tag_len;
+
+  if (max_out_len < plaintext_len) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_open,
+                      CIPHER_R_BUFFER_TOO_SMALL);
+    return 0;
+  }
+
+  if (nonce_len != EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_open,
+                      CIPHER_R_UNSUPPORTED_NONCE_SIZE);
+    return 0;
+  }
+
+  uint8_t hmac_result[SHA256_DIGEST_LENGTH];
+  hmac_calculate(hmac_result, &aes_ctx->inner_init_state,
+                 &aes_ctx->outer_init_state, ad, ad_len, nonce, in,
+                 plaintext_len);
+  if (CRYPTO_memcmp(hmac_result, in + plaintext_len, aes_ctx->tag_len) != 0) {
+    OPENSSL_PUT_ERROR(CIPHER, aead_aes_ctr_hmac_sha256_open,
+                      CIPHER_R_BAD_DECRYPT);
+    return 0;
+  }
+
+  aead_aes_ctr_hmac_sha256_crypt(aes_ctx, out, in, plaintext_len, nonce);
+
+  *out_len = plaintext_len;
+  return 1;
+}
+
+static const EVP_AEAD aead_aes_128_ctr_hmac_sha256 = {
+    16 /* AES key */ + 32 /* HMAC key */,
+    12,                                       /* nonce length */
+    EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN,     /* overhead */
+    EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN,     /* max tag length */
+
+    aead_aes_ctr_hmac_sha256_init,
+    NULL /* init_with_direction */,
+    aead_aes_ctr_hmac_sha256_cleanup,
+    aead_aes_ctr_hmac_sha256_seal,
+    aead_aes_ctr_hmac_sha256_open,
+};
+
+static const EVP_AEAD aead_aes_256_ctr_hmac_sha256 = {
+    32 /* AES key */ + 32 /* HMAC key */,
+    12,                                       /* nonce length */
+    EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN,     /* overhead */
+    EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN,     /* max tag length */
+
+    aead_aes_ctr_hmac_sha256_init,
+    NULL /* init_with_direction */,
+    aead_aes_ctr_hmac_sha256_cleanup,
+    aead_aes_ctr_hmac_sha256_seal,
+    aead_aes_ctr_hmac_sha256_open,
+};
+
+const EVP_AEAD *EVP_aead_aes_128_ctr_hmac_sha256(void) {
+  return &aead_aes_128_ctr_hmac_sha256;
+}
+
+const EVP_AEAD *EVP_aead_aes_256_ctr_hmac_sha256(void) {
+  return &aead_aes_256_ctr_hmac_sha256;
+}
+
 int EVP_has_aes_hardware(void) {
 #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
   return aesni_capable() && crypto_gcm_clmul_enabled();
diff --git a/crypto/cipher/test/aes_128_ctr_hmac_sha256.txt b/crypto/cipher/test/aes_128_ctr_hmac_sha256.txt
new file mode 100644
index 0000000..d4803a0
--- /dev/null
+++ b/crypto/cipher/test/aes_128_ctr_hmac_sha256.txt
@@ -0,0 +1,336 @@
+KEY: 067b841a2540cb467b75f2188f5da4b5aeb7e0e44582a2b668b5b1ff39e21c4e65745470fb1be1aa909c62fabcf0e6ac
+NONCE: 10e0ecb00da5345127407150
+IN: 
+AD: 
+CT: 
+TAG: a82a891565e466957ad5a499d45b579d31acaf582f54d518f8f9c128936dac4c
+
+KEY: c9d9ef2c808c3f8b22f659c12147104b08cec2390a84f0c4b887ca4c247c8c9dd45e72f48b30b67a8545750387232344
+NONCE: 58bddf96158a3a588bf3ec05
+IN: 
+AD: 5d
+CT: 
+TAG: 3580c1601d1c9a5b1595d3dee35b0cd9e1b115d8b0abee557b2c207b8d0df5ee
+
+KEY: f755dc6786e21f39b595389a51d36673e1ffb94ffc066c03873eb31839be6fa319fd31c8bea29f03ff28831861e60b6e
+NONCE: bd6c80797f1f4c563b06fd3b
+IN: 
+AD: 78d88005136e312639572343a2d0daf7483d8235291ee3ac002469456b075243dc03380c387030d546c2b1
+CT: 
+TAG: dede80d810fc449a769c79a5ecd2c0d68e9e0fae567781e623ab2098c88d8a86
+
+KEY: 43a0a28fef8b89b8fb0f76de01d802935ad561e27ca9c9fa629347be676a6af758501b6a652f369045da5fef751b56bb
+NONCE: 0f6472f1e589c16ca5ad45b2
+IN: 
+AD: 78e4eafccfc87631f0314c442ba4c07bca36f996a5b3408f9e445d6009a87ded16b33a4af9537a4619cab70d
+CT: 
+TAG: 11fa62dd8374aabe728ebf7e9aa1c02cf8f2dbc29f9aaf1940313f0b7c3e0301
+
+KEY: acf8e5f1bd64e6289370650b5b3fd773320025c8b229fd335d9461768cd0a17b4bcc946919932efdc9fc84a7f50768bf
+NONCE: 1aecfc90d28bcdcc5a8e3578
+IN: 
+AD: 6daedbdc69133b56f6a8f098f9f70cdb7e129e51115df385a6d86204a53412cd999cf2e69f45e168efed4742b6
+CT: 
+TAG: fbe0511ba0ec5709def9966a9b05facf171cddd81ee2cd56e7afc867af465f31
+
+KEY: 2773c92e6cddc9a5e5dcaf3893080fd2153f009d807df0b175c76615645f2087539e299d8411b27badb749a9845c5e29
+NONCE: 6d04ed129299651aec0465f8
+IN: 
+AD: 44219577e361a7a4681172d120a2d653a53ec74bc487ccde4954835943bca413d55c65dc665310148654d8c1e2e6bc2f06ec344473120ad1f95739b993a57f9ec0b3299cc088f385894fff876fc2ce8ce6b77ca253f177ba615101e84e17ad0e60704cff195dcd50eb48c77de409797e0b1c8c4c5b9215a4a0399954a008267b
+CT: 
+TAG: 6ab61ac4493e58e48d071d994a000f1c1f498d22f83c8d2af56b03c155afc57e
+
+KEY: 23189bf23bc4b734410d1c7ae321c42e144a25347a8029bb925e3d8ac1b92f4eb97227c1dece86ae9dea7d127eb33f9b
+NONCE: 30681944cd5d78f46d36ed8a
+IN: 59
+AD: 
+CT: 92
+TAG: 986aa8438da3cf4a98f478f90d24908c6a4e848f299873e649b256f5499d89d9
+
+KEY: 463d1148325c5f57af670877068a78203571b8b19f40e9f0373156b7448ab315df86c77d7c85ba6e54b9bc329399f687
+NONCE: cc9d015a4b5a888b36b14d05
+IN: 28
+AD: 6a
+CT: 05
+TAG: f66e8dc794b142944fa46d5c04a3e3fe00291668374846d763f2beeffd4ca4a0
+
+KEY: 937eaab44e7c7d2cd5bbb053c12e6255e0aaa42cbe7d83025b7a2887eff8f098d019c80af849b0ed7da54a5ba5b39200
+NONCE: 2b160d24df579836e1572ea2
+IN: 9a
+AD: 35841a33ba3a6ed3d89a1f76d06c61613d09834847e5a41f8616748e30c14335e5baa43d49fceaf85aeb22
+CT: 80
+TAG: 5e5799c147be0329dbcabf7ecdba6ac595ebc2d06b9d757426fbb31e8b39f62a
+
+KEY: 68a746f382fcc11c02af7b352b9d710c137a9f59bc5886dc374ca88cdc01b86fe5678fde16cfa846846539f67a429276
+NONCE: b94346c033ac1a3d709c4f09
+IN: ad
+AD: ad61c9168debf9974e19759088944e888346aff99f3e2e4522549c8ae332a0f41922972fb7c1d5ff24e7ae4b
+CT: 46
+TAG: 62ae92ff64710a9f260da2562e246356e9d749c3584fb9f40d9572307ccbbd31
+
+KEY: 6622579d1d6350fd5dff432b69d172cc51f99bdaff50b0a1c0f4cda8d5904581ba8657ba61c6936407243d7fb64b00da
+NONCE: a880caa7157a13540d2b724f
+IN: 2a
+AD: 95a23eafcff892deecaf093109d30290d819851ad5c91061510e54baa2b039b114c815da20f0e3ba2ba4875bdd
+CT: ce
+TAG: 33f09666f9fd1d92f137d9f3f7092b47b2bd71a7e3139dcd19a803a6b17f2a3a
+
+KEY: 91ce9dd87c7d11d2c4da41863b6851c40fba786a612e0fbf0d1956a71286dfc61fa10bf7d148cecd72b6ceeb82b68d3f
+NONCE: a50dc3d8fd63d3076cc70ff6
+IN: da
+AD: 9ce8e1a777c159ec775abbd67d85e84f3550c3296e848dec18b61bbd713a98a033805bfe6e2f2a011dd7fd754708e524168142aeee579cae19c7eab78fa7c42fa335f0c725baf556160beef9e4afd1050a2c8813be6bd14cc6982116d0229d53e9b4de923abf6ba99bdffe1d5f21748ae74caddb077d9f7488b394436222beca
+CT: 2b
+TAG: 1541cd745bc0259dd72a212474f5c7b8c121dd0289d674e5ba8d56a220d1f1d0
+
+KEY: 1ad577d3b47e3fff8528e336a43a7ffef72f811e05b5c69ccfe777b10f29061e289178e394a1c87ba483c7f98ea5431d
+NONCE: 1fcaa4757a9e48ed2cb3be62
+IN: 46d30dac550103006c292a9ac05d31
+AD: 
+CT: 37616eba30c55595fa0ad5d50f91ca
+TAG: 5c3ac4010f75adf90f81e775b07ab939e7551a9b8e0486ba33766728ed498245
+
+KEY: 6df310dc1847b42c68e50b03d154b73d7f3823354b32759c5369bce1a1b4cd63ccdb911c2dc792acf84b8b8f3fdfb89d
+NONCE: 92e6759a31dd556ff9124d73
+IN: 6daba76658db642209e276ff7c8d46
+AD: 32
+CT: ce1814c03037078b6be3252460af48
+TAG: 46e61913f2a1ff6e77faade9a7cd37a82eff3ebec4276fbddff9266b9c9bd873
+
+KEY: f848c2300995f5c98dcd0db24574d7c61459ca64c084421c6ad156e80e398904417ee745245ddae91be20fb07e66bdb6
+NONCE: 3b177e11063445717f417d14
+IN: bbf225131c821a6a60817cc65bf699
+AD: 4c5ab4fdbe0018344629349feed5d8c3ae0c5b64f2b093576a2aaa1225e7a50eca01a9962c9b4f8fc5c12a
+CT: 1538957e78f3ab0fed77906153d715
+TAG: 2c7760d47407ad7b0d5b85fa4967eaa7b6c0bb6eb16619adde7a191abfdf3da3
+
+KEY: d406cac07630ce2c071732a0ec95f55123486d2677465768dc7db13f90902cf172f92e19f57f5cf7c68cd7bde7ee4b4b
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diff --git a/crypto/cipher/test/aes_256_ctr_hmac_sha256.txt b/crypto/cipher/test/aes_256_ctr_hmac_sha256.txt
new file mode 100644
index 0000000..2a72e1c
--- /dev/null
+++ b/crypto/cipher/test/aes_256_ctr_hmac_sha256.txt
@@ -0,0 +1,336 @@
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+TAG: dcc158c254ff7e131ad854a2158d51c643c281dfd7df342d5481384ab236a685
+
+KEY: 409d1b4e1c187c8b1c053e999f2af648583e1045d56d553cce9270d08c5643ef365eb35e3bdeaedcd164b0122ad185e71c75146a9807104d9b65b56d9bc1dc55
+NONCE: 1cce3f08a5aa5824d063a6f2
+IN: a255239e4065f3effe6aa5e88814d516236d016c51cd8eb35af7cee86418966559802f8ff7ac39c6a45acc1f1b18cc28d7cc32ae66dff43289fe44c3a2a72fbadf3a7249d76c1ba9671dfc420ddf513539f2da5f31030f2b6775c57432c2c3486621d841e80dd4894229debc12ef47d74716838f2d807e208f0fdaf733bce76e
+AD: 8f34f8b676e71844841c6a7b63fef1ad3061f2449c1044e1a281595da2d9e9fd141aea7350bd8cf9774d375e67
+CT: 969fc2c64261db415e51eee8cc5e0cf5185b8e3325dea516a70e32115a5b72233a44458c40f2daff3594d71e42ca2e3fc1c444ce171d22ef40009d798456613fa4b76beaa6d469e235997a302ac468c8bcfb8ef5de5cda58d7e554a9eab6cb568945dc37f28b0dbd674c083dfbd2e42fda1b42d0c1966e9652a21b32af71e2d5
+TAG: fa0789a83c255412501944a67bdceaff3f01d9a23b0c749be38abc956e2acae6
+
+KEY: e6fd8144cdb305bf9e62a2c901764c62902f354409d8c5b9c8cbfc0ba8ac7d0859ff8994e573e46784395d89c355a91a313f601b56e86ed3fd10ba428a5481ce
+NONCE: bae080718d3e5c5998542f15
+IN: 2258ffcd6fcf91b1723f8db0047525d61cc8ffc440acf3290690685d16384292493807312b7dfc23ac9d9c3ee1405baab21a3770a05875cfe325268b65fc877463e3208c842ea4a32cf144cc46d57afd91f6b6b5d85fb2dedb0702f0c4e7f742cf4c9b4aec02f07267ec1f7b96a5a3ef25f6c1b4c27bd829e86583e239cd854b
+AD: 51ae57749b7757718aef9b9c47da5794659516e7f98bc80e6c18c89253f8617963331f54d4f009f087d1d2bd69a083f3a4b98f2a51ce24ffc6079774f7c7b01638b6131bfccebe21fea67bc839c259a50fcc0a16a69ada3c5adee4097d9e053a03266cb9b4b39ee2a465ec1aa058e61a0b9888b93bfcfd103f91ca3a7b274a10
+CT: 5b2fe8eea3313cc04d5ec75d75d05b3242b6e3b65c6fa1761716780c9529ff8ca523096dd037c5bda27984aa93c702ce9c01c63569a90657cc6373ad5d4473028b7eef69dd79c44c38d0063e8a8b7f1aa2bf6b646711ecd4eea3fa27408e089d9c4c4aceedff29a25baa6a9069eb7eac83a53212c0b387d700547c46cdc525e3
+TAG: 60319de093aec5c0bb8d5f17e950b0f4df0dfd20ad96490f6f12db461b2a4a84
+
diff --git a/crypto/err/cipher.errordata b/crypto/err/cipher.errordata
index bc7666e..ce8459b 100644
--- a/crypto/err/cipher.errordata
+++ b/crypto/err/cipher.errordata
@@ -8,6 +8,9 @@
 CIPHER,function,106,EVP_CipherInit_ex
 CIPHER,function,107,EVP_DecryptFinal_ex
 CIPHER,function,108,EVP_EncryptFinal_ex
+CIPHER,function,132,aead_aes_ctr_hmac_sha256_init
+CIPHER,function,133,aead_aes_ctr_hmac_sha256_open
+CIPHER,function,134,aead_aes_ctr_hmac_sha256_seal
 CIPHER,function,109,aead_aes_gcm_init
 CIPHER,function,110,aead_aes_gcm_open
 CIPHER,function,111,aead_aes_gcm_seal
diff --git a/include/openssl/aead.h b/include/openssl/aead.h
index 4b8f6cd..b39939d 100644
--- a/include/openssl/aead.h
+++ b/include/openssl/aead.h
@@ -115,6 +115,15 @@
  * See |EVP_aead_aes_128_key_wrap| for details. */
 OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_256_key_wrap(void);
 
+/* EVP_aead_aes_128_ctr_hmac_sha256 is AES-128 in CTR mode with HMAC-SHA256 for
+ * authentication. The nonce is 12 bytes; the bottom 32-bits are used as the
+ * block counter, thus the maximum plaintext size is 64GB. */
+OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_128_ctr_hmac_sha256(void);
+
+/* EVP_aead_aes_128_ctr_hmac_sha256 is AES-256 in CTR mode with HMAC-SHA256 for
+ * authentication. See |EVP_aead_aes_128_ctr_hmac_sha256| for details. */
+OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_256_ctr_hmac_sha256(void);
+
 /* EVP_has_aes_hardware returns one if we enable hardware support for fast and
  * constant-time AES-GCM. */
 OPENSSL_EXPORT int EVP_has_aes_hardware(void);
diff --git a/include/openssl/cipher.h b/include/openssl/cipher.h
index 43b6cd5..1df4699 100644
--- a/include/openssl/cipher.h
+++ b/include/openssl/cipher.h
@@ -531,6 +531,9 @@
 #define CIPHER_F_aes_init_key 129
 #define CIPHER_F_aesni_init_key 130
 #define CIPHER_F_EVP_AEAD_CTX_init_with_direction 131
+#define CIPHER_F_aead_aes_ctr_hmac_sha256_init 132
+#define CIPHER_F_aead_aes_ctr_hmac_sha256_open 133
+#define CIPHER_F_aead_aes_ctr_hmac_sha256_seal 134
 #define CIPHER_R_AES_KEY_SETUP_FAILED 100
 #define CIPHER_R_BAD_DECRYPT 101
 #define CIPHER_R_BAD_KEY_LENGTH 102
diff --git a/util/all_tests.go b/util/all_tests.go
index 907dc48..ded798e 100644
--- a/util/all_tests.go
+++ b/util/all_tests.go
@@ -62,6 +62,8 @@
 	{"crypto/cipher/aead_test", "aes-128-cbc-sha1-ssl3", "crypto/cipher/test/aes_128_cbc_sha1_ssl3_tests.txt"},
 	{"crypto/cipher/aead_test", "aes-256-cbc-sha1-ssl3", "crypto/cipher/test/aes_256_cbc_sha1_ssl3_tests.txt"},
 	{"crypto/cipher/aead_test", "des-ede3-cbc-sha1-ssl3", "crypto/cipher/test/des_ede3_cbc_sha1_ssl3_tests.txt"},
+	{"crypto/cipher/aead_test", "aes-128-ctr-hmac-sha256", "crypto/cipher/test/aes_128_ctr_hmac_sha256.txt"},
+	{"crypto/cipher/aead_test", "aes-256-ctr-hmac-sha256", "crypto/cipher/test/aes_256_ctr_hmac_sha256.txt"},
 	{"crypto/cipher/cipher_test", "crypto/cipher/test/cipher_test.txt"},
 	{"crypto/constant_time_test"},
 	{"crypto/dh/dh_test"},