crypto: rmd256 - remove RIPE-MD 256 hash algorithm

RIPE-MD 256 is never referenced anywhere in the kernel, and unlikely
to be depended upon by userspace via AF_ALG. So let's remove it
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -834,18 +834,6 @@ config CRYPTO_RMD160
 	  Developed by Hans Dobbertin, Antoon Bosselaers and Bart Preneel.
 	  See <https://homes.esat.kuleuven.be/~bosselae/ripemd160.html>
 
-config CRYPTO_RMD256
-	tristate "RIPEMD-256 digest algorithm"
-	select CRYPTO_HASH
-	help
-	  RIPEMD-256 is an optional extension of RIPEMD-128 with a
-	  256 bit hash. It is intended for applications that require
-	  longer hash-results, without needing a larger security level
-	  (than RIPEMD-128).
-
-	  Developed by Hans Dobbertin, Antoon Bosselaers and Bart Preneel.
-	  See <https://homes.esat.kuleuven.be/~bosselae/ripemd160.html>
-
 config CRYPTO_RMD320
 	tristate "RIPEMD-320 digest algorithm"
 	select CRYPTO_HASH

crypto/Makefile

@@ -68,7 +68,6 @@ obj-$(CONFIG_CRYPTO_NULL2) += crypto_null.o
 obj-$(CONFIG_CRYPTO_MD4) += md4.o
 obj-$(CONFIG_CRYPTO_MD5) += md5.o
 obj-$(CONFIG_CRYPTO_RMD160) += rmd160.o
-obj-$(CONFIG_CRYPTO_RMD256) += rmd256.o
 obj-$(CONFIG_CRYPTO_RMD320) += rmd320.o
 obj-$(CONFIG_CRYPTO_SHA1) += sha1_generic.o
 obj-$(CONFIG_CRYPTO_SHA256) += sha256_generic.o

crypto/ripemd.h

@@ -9,9 +9,6 @@
 #define RMD160_DIGEST_SIZE      20
 #define RMD160_BLOCK_SIZE       64
 
-#define RMD256_DIGEST_SIZE      32
-#define RMD256_BLOCK_SIZE       64
-
 #define RMD320_DIGEST_SIZE      40
 #define RMD320_BLOCK_SIZE       64
 

crypto/tcrypt.c

@@ -71,7 +71,7 @@ static const char *check[] = {
 	"blowfish", "twofish", "serpent", "sha384", "sha512", "md4", "aes",
 	"cast6", "arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",
 	"khazad", "wp512", "wp384", "wp256", "tnepres", "xeta",  "fcrypt",
-	"camellia", "seed", "salsa20", "rmd160", "rmd256", "rmd320",
+	"camellia", "seed", "salsa20", "rmd160", "rmd320",
 	"lzo", "lzo-rle", "cts", "sha3-224", "sha3-256", "sha3-384",
 	"sha3-512", "streebog256", "streebog512",
 	NULL
@@ -1871,10 +1871,6 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
 		ret += tcrypt_test("rmd160");
 		break;
 
-	case 41:
-		ret += tcrypt_test("rmd256");
-		break;
-
 	case 42:
 		ret += tcrypt_test("rmd320");
 		break;
@@ -2405,10 +2401,6 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
 		test_hash_speed("rmd160", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
 		fallthrough;
-	case 316:
-		test_hash_speed("rmd256", sec, generic_hash_speed_template);
-		if (mode > 300 && mode < 400) break;
-		fallthrough;
 	case 317:
 		test_hash_speed("rmd320", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
@@ -2525,10 +2517,6 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
 		test_ahash_speed("rmd160", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
 		fallthrough;
-	case 416:
-		test_ahash_speed("rmd256", sec, generic_hash_speed_template);
-		if (mode > 400 && mode < 500) break;
-		fallthrough;
 	case 417:
 		test_ahash_speed("rmd320", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;

crypto/testmgr.c

@@ -5275,12 +5275,6 @@ static const struct alg_test_desc alg_test_descs[] = {
 		.suite = {
 			.hash = __VECS(rmd160_tv_template)
 		}
-	}, {
-		.alg = "rmd256",
-		.test = alg_test_hash,
-		.suite = {
-			.hash = __VECS(rmd256_tv_template)
-		}
 	}, {
 		.alg = "rmd320",
 		.test = alg_test_hash,

crypto/testmgr.h

@@ -3200,70 +3200,6 @@ static const struct hash_testvec rmd160_tv_template[] = {
 	}
 };
 
-/*
- * RIPEMD-256 test vectors
- */
-static const struct hash_testvec rmd256_tv_template[] = {
-	{
-		.digest	= "\x02\xba\x4c\x4e\x5f\x8e\xcd\x18"
-			  "\x77\xfc\x52\xd6\x4d\x30\xe3\x7a"
-			  "\x2d\x97\x74\xfb\x1e\x5d\x02\x63"
-			  "\x80\xae\x01\x68\xe3\xc5\x52\x2d",
-	}, {
-		.plaintext = "a",
-		.psize	= 1,
-		.digest	= "\xf9\x33\x3e\x45\xd8\x57\xf5\xd9"
-			  "\x0a\x91\xba\xb7\x0a\x1e\xba\x0c"
-			  "\xfb\x1b\xe4\xb0\x78\x3c\x9a\xcf"
-			  "\xcd\x88\x3a\x91\x34\x69\x29\x25",
-	}, {
-		.plaintext = "abc",
-		.psize	= 3,
-		.digest	= "\xaf\xbd\x6e\x22\x8b\x9d\x8c\xbb"
-			  "\xce\xf5\xca\x2d\x03\xe6\xdb\xa1"
-			  "\x0a\xc0\xbc\x7d\xcb\xe4\x68\x0e"
-			  "\x1e\x42\xd2\xe9\x75\x45\x9b\x65",
-	}, {
-		.plaintext = "message digest",
-		.psize	= 14,
-		.digest	= "\x87\xe9\x71\x75\x9a\x1c\xe4\x7a"
-			  "\x51\x4d\x5c\x91\x4c\x39\x2c\x90"
-			  "\x18\xc7\xc4\x6b\xc1\x44\x65\x55"
-			  "\x4a\xfc\xdf\x54\xa5\x07\x0c\x0e",
-	}, {
-		.plaintext = "abcdefghijklmnopqrstuvwxyz",
-		.psize	= 26,
-		.digest	= "\x64\x9d\x30\x34\x75\x1e\xa2\x16"
-			  "\x77\x6b\xf9\xa1\x8a\xcc\x81\xbc"
-			  "\x78\x96\x11\x8a\x51\x97\x96\x87"
-			  "\x82\xdd\x1f\xd9\x7d\x8d\x51\x33",
-	}, {
-		.plaintext = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcde"
-			     "fghijklmnopqrstuvwxyz0123456789",
-		.psize	= 62,
-		.digest	= "\x57\x40\xa4\x08\xac\x16\xb7\x20"
-			  "\xb8\x44\x24\xae\x93\x1c\xbb\x1f"
-			  "\xe3\x63\xd1\xd0\xbf\x40\x17\xf1"
-			  "\xa8\x9f\x7e\xa6\xde\x77\xa0\xb8",
-	}, {
-		.plaintext = "1234567890123456789012345678901234567890"
-			     "1234567890123456789012345678901234567890",
-		.psize	= 80,
-		.digest	= "\x06\xfd\xcc\x7a\x40\x95\x48\xaa"
-			  "\xf9\x13\x68\xc0\x6a\x62\x75\xb5"
-			  "\x53\xe3\xf0\x99\xbf\x0e\xa4\xed"
-			  "\xfd\x67\x78\xdf\x89\xa8\x90\xdd",
-	}, {
-		.plaintext = "abcdbcdecdefdefgefghfghighij"
-			     "hijkijkljklmklmnlmnomnopnopq",
-		.psize	= 56,
-		.digest	= "\x38\x43\x04\x55\x83\xaa\xc6\xc8"
-			  "\xc8\xd9\x12\x85\x73\xe7\xa9\x80"
-			  "\x9a\xfb\x2a\x0f\x34\xcc\xc3\x6e"
-			  "\xa9\xe7\x2f\x16\xf6\x36\x8e\x3f",
-	}
-};
-
 /*
  * RIPEMD-320 test vectors
  */