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-rw-r--r--arch/sparc/crypto/sha512_glue.c228
1 files changed, 228 insertions, 0 deletions
diff --git a/arch/sparc/crypto/sha512_glue.c b/arch/sparc/crypto/sha512_glue.c
new file mode 100644
index 000000000..11eb36c3f
--- /dev/null
+++ b/arch/sparc/crypto/sha512_glue.c
@@ -0,0 +1,228 @@
+/* Glue code for SHA512 hashing optimized for sparc64 crypto opcodes.
+ *
+ * This is based largely upon crypto/sha512_generic.c
+ *
+ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/cryptohash.h>
+#include <linux/types.h>
+#include <crypto/sha.h>
+
+#include <asm/pstate.h>
+#include <asm/elf.h>
+
+#include "opcodes.h"
+
+asmlinkage void sha512_sparc64_transform(u64 *digest, const char *data,
+ unsigned int rounds);
+
+static int sha512_sparc64_init(struct shash_desc *desc)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ sctx->state[0] = SHA512_H0;
+ sctx->state[1] = SHA512_H1;
+ sctx->state[2] = SHA512_H2;
+ sctx->state[3] = SHA512_H3;
+ sctx->state[4] = SHA512_H4;
+ sctx->state[5] = SHA512_H5;
+ sctx->state[6] = SHA512_H6;
+ sctx->state[7] = SHA512_H7;
+ sctx->count[0] = sctx->count[1] = 0;
+
+ return 0;
+}
+
+static int sha384_sparc64_init(struct shash_desc *desc)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ sctx->state[0] = SHA384_H0;
+ sctx->state[1] = SHA384_H1;
+ sctx->state[2] = SHA384_H2;
+ sctx->state[3] = SHA384_H3;
+ sctx->state[4] = SHA384_H4;
+ sctx->state[5] = SHA384_H5;
+ sctx->state[6] = SHA384_H6;
+ sctx->state[7] = SHA384_H7;
+ sctx->count[0] = sctx->count[1] = 0;
+
+ return 0;
+}
+
+static void __sha512_sparc64_update(struct sha512_state *sctx, const u8 *data,
+ unsigned int len, unsigned int partial)
+{
+ unsigned int done = 0;
+
+ if ((sctx->count[0] += len) < len)
+ sctx->count[1]++;
+ if (partial) {
+ done = SHA512_BLOCK_SIZE - partial;
+ memcpy(sctx->buf + partial, data, done);
+ sha512_sparc64_transform(sctx->state, sctx->buf, 1);
+ }
+ if (len - done >= SHA512_BLOCK_SIZE) {
+ const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
+
+ sha512_sparc64_transform(sctx->state, data + done, rounds);
+ done += rounds * SHA512_BLOCK_SIZE;
+ }
+
+ memcpy(sctx->buf, data + done, len - done);
+}
+
+static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
+
+ /* Handle the fast case right here */
+ if (partial + len < SHA512_BLOCK_SIZE) {
+ if ((sctx->count[0] += len) < len)
+ sctx->count[1]++;
+ memcpy(sctx->buf + partial, data, len);
+ } else
+ __sha512_sparc64_update(sctx, data, len, partial);
+
+ return 0;
+}
+
+static int sha512_sparc64_final(struct shash_desc *desc, u8 *out)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ unsigned int i, index, padlen;
+ __be64 *dst = (__be64 *)out;
+ __be64 bits[2];
+ static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
+
+ /* Save number of bits */
+ bits[1] = cpu_to_be64(sctx->count[0] << 3);
+ bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
+
+ /* Pad out to 112 mod 128 and append length */
+ index = sctx->count[0] % SHA512_BLOCK_SIZE;
+ padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index);
+
+ /* We need to fill a whole block for __sha512_sparc64_update() */
+ if (padlen <= 112) {
+ if ((sctx->count[0] += padlen) < padlen)
+ sctx->count[1]++;
+ memcpy(sctx->buf + index, padding, padlen);
+ } else {
+ __sha512_sparc64_update(sctx, padding, padlen, index);
+ }
+ __sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112);
+
+ /* Store state in digest */
+ for (i = 0; i < 8; i++)
+ dst[i] = cpu_to_be64(sctx->state[i]);
+
+ /* Wipe context */
+ memset(sctx, 0, sizeof(*sctx));
+
+ return 0;
+}
+
+static int sha384_sparc64_final(struct shash_desc *desc, u8 *hash)
+{
+ u8 D[64];
+
+ sha512_sparc64_final(desc, D);
+
+ memcpy(hash, D, 48);
+ memzero_explicit(D, 64);
+
+ return 0;
+}
+
+static struct shash_alg sha512 = {
+ .digestsize = SHA512_DIGEST_SIZE,
+ .init = sha512_sparc64_init,
+ .update = sha512_sparc64_update,
+ .final = sha512_sparc64_final,
+ .descsize = sizeof(struct sha512_state),
+ .base = {
+ .cra_name = "sha512",
+ .cra_driver_name= "sha512-sparc64",
+ .cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA512_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static struct shash_alg sha384 = {
+ .digestsize = SHA384_DIGEST_SIZE,
+ .init = sha384_sparc64_init,
+ .update = sha512_sparc64_update,
+ .final = sha384_sparc64_final,
+ .descsize = sizeof(struct sha512_state),
+ .base = {
+ .cra_name = "sha384",
+ .cra_driver_name= "sha384-sparc64",
+ .cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA384_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static bool __init sparc64_has_sha512_opcode(void)
+{
+ unsigned long cfr;
+
+ if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+ return false;
+
+ __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+ if (!(cfr & CFR_SHA512))
+ return false;
+
+ return true;
+}
+
+static int __init sha512_sparc64_mod_init(void)
+{
+ if (sparc64_has_sha512_opcode()) {
+ int ret = crypto_register_shash(&sha384);
+ if (ret < 0)
+ return ret;
+
+ ret = crypto_register_shash(&sha512);
+ if (ret < 0) {
+ crypto_unregister_shash(&sha384);
+ return ret;
+ }
+
+ pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");
+ return 0;
+ }
+ pr_info("sparc64 sha512 opcode not available.\n");
+ return -ENODEV;
+}
+
+static void __exit sha512_sparc64_mod_fini(void)
+{
+ crypto_unregister_shash(&sha384);
+ crypto_unregister_shash(&sha512);
+}
+
+module_init(sha512_sparc64_mod_init);
+module_exit(sha512_sparc64_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated");
+
+MODULE_ALIAS_CRYPTO("sha384");
+MODULE_ALIAS_CRYPTO("sha512");
+
+#include "crop_devid.c"
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