[PATCH 03/11] crypto: ecc - Use crypto_stdrng_get_bytes()

[Eric Biggers <ebiggers@kernel.org>]

Replace the sequence of crypto_get_default_rng(),
crypto_rng_get_bytes(), and crypto_put_default_rng() with the equivalent
helper function crypto_stdrng_get_bytes().

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
---
 crypto/ecc.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/crypto/ecc.c b/crypto/ecc.c
index 08150b14e17e..43b0def3a225 100644
--- a/crypto/ecc.c
+++ b/crypto/ecc.c
@@ -1531,20 +1531,15 @@ int ecc_gen_privkey(unsigned int curve_id, unsigned int ndigits,
 	 * strength associated with N.
 	 *
 	 * The maximum security strength identified by NIST SP800-57pt1r4 for
 	 * ECC is 256 (N >= 512).
 	 *
-	 * This condition is met by the default RNG because it selects a favored
-	 * DRBG with a security strength of 256.
+	 * This condition is met by stdrng because it selects a favored DRBG
+	 * with a security strength of 256.
 	 */
-	if (crypto_get_default_rng())
-		return -EFAULT;
-
 	/* Step 3: obtain N returned_bits from the DRBG. */
-	err = crypto_rng_get_bytes(crypto_default_rng,
-				   (u8 *)private_key, nbytes);
-	crypto_put_default_rng();
+	err = crypto_stdrng_get_bytes(private_key, nbytes);
 	if (err)
 		return err;
 
 	/* Step 4: make sure the private key is in the valid range. */
 	if (__ecc_is_key_valid(curve, private_key, ndigits))
-- 
2.53.0