Merge tag 'v6.5-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "API:
   - Add linear akcipher/sig API
   - Add tfm cloning (hmac, cmac)
   - Add statesize to crypto_ahash

  Algorithms:
   - Allow only odd e and restrict value in FIPS mode for RSA
   - Replace LFSR with SHA3-256 in jitter
   - Add interface for gathering of raw entropy in jitter

  Drivers:
   - Fix race on data_avail and actual data in hwrng/virtio
   - Add hash and HMAC support in starfive
   - Add RSA algo support in starfive
   - Add support for PCI device 0x156E in ccp"

* tag 'v6.5-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (85 commits)
  crypto: akcipher - Do not copy dst if it is NULL
  crypto: sig - Fix verify call
  crypto: akcipher - Set request tfm on sync path
  crypto: sm2 - Provide sm2_compute_z_digest when sm2 is disabled
  hwrng: imx-rngc - switch to DEFINE_SIMPLE_DEV_PM_OPS
  hwrng: st - keep clock enabled while hwrng is registered
  hwrng: st - support compile-testing
  hwrng: imx-rngc - fix the timeout for init and self check
  KEYS: asymmetric: Use new crypto interface without scatterlists
  KEYS: asymmetric: Move sm2 code into x509_public_key
  KEYS: Add forward declaration in asymmetric-parser.h
  crypto: sig - Add interface for sign/verify
  crypto: akcipher - Add sync interface without SG lists
  crypto: cipher - On clone do crypto_mod_get()
  crypto: api - Add __crypto_alloc_tfmgfp
  crypto: api - Remove crypto_init_ops()
  crypto: rsa - allow only odd e and restrict value in FIPS mode
  crypto: geniv - Split geniv out of AEAD Kconfig option
  crypto: algboss - Add missing dependency on RNG2
  crypto: starfive - Add RSA algo support
  ...

1 files changed, 28 insertions, 0 deletions

diff --git a/crypto/cipher.c b/crypto/cipher.c
index b47141ed4a9f..47c77a3e5978 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -90,3 +90,31 @@ void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
 	cipher_crypt_one(tfm, dst, src, false);
 }
 EXPORT_SYMBOL_NS_GPL(crypto_cipher_decrypt_one, CRYPTO_INTERNAL);
+
+struct crypto_cipher *crypto_clone_cipher(struct crypto_cipher *cipher)
+{
+	struct crypto_tfm *tfm = crypto_cipher_tfm(cipher);
+	struct crypto_alg *alg = tfm->__crt_alg;
+	struct crypto_cipher *ncipher;
+	struct crypto_tfm *ntfm;
+
+	if (alg->cra_init)
+		return ERR_PTR(-ENOSYS);
+
+	if (unlikely(!crypto_mod_get(alg)))
+		return ERR_PTR(-ESTALE);
+
+	ntfm = __crypto_alloc_tfmgfp(alg, CRYPTO_ALG_TYPE_CIPHER,
+				     CRYPTO_ALG_TYPE_MASK, GFP_ATOMIC);
+	if (IS_ERR(ntfm)) {
+		crypto_mod_put(alg);
+		return ERR_CAST(ntfm);
+	}
+
+	ntfm->crt_flags = tfm->crt_flags;
+
+	ncipher = __crypto_cipher_cast(ntfm);
+
+	return ncipher;
+}
+EXPORT_SYMBOL_GPL(crypto_clone_cipher);