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-rw-r--r--arch/s390/crypto/sha3_512_s390.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/s390/crypto/sha3_512_s390.c b/arch/s390/crypto/sha3_512_s390.c
new file mode 100644
index 000000000..06c142ed9
--- /dev/null
+++ b/arch/s390/crypto/sha3_512_s390.c
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Cryptographic API.
+ *
+ * s390 implementation of the SHA512 and SHA384 Secure Hash Algorithm.
+ *
+ * Copyright IBM Corp. 2019
+ * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
+ */
+#include <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/cpufeature.h>
+#include <crypto/sha3.h>
+#include <asm/cpacf.h>
+
+#include "sha.h"
+
+static int sha3_512_init(struct shash_desc *desc)
+{
+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+
+ memset(sctx->state, 0, sizeof(sctx->state));
+ sctx->count = 0;
+ sctx->func = CPACF_KIMD_SHA3_512;
+
+ return 0;
+}
+
+static int sha3_512_export(struct shash_desc *desc, void *out)
+{
+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+ struct sha3_state *octx = out;
+
+ octx->rsiz = sctx->count;
+ octx->rsizw = sctx->count >> 32;
+
+ memcpy(octx->st, sctx->state, sizeof(octx->st));
+ memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
+
+ return 0;
+}
+
+static int sha3_512_import(struct shash_desc *desc, const void *in)
+{
+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+ const struct sha3_state *ictx = in;
+
+ if (unlikely(ictx->rsizw))
+ return -ERANGE;
+ sctx->count = ictx->rsiz;
+
+ memcpy(sctx->state, ictx->st, sizeof(ictx->st));
+ memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
+ sctx->func = CPACF_KIMD_SHA3_512;
+
+ return 0;
+}
+
+static int sha3_384_import(struct shash_desc *desc, const void *in)
+{
+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+ const struct sha3_state *ictx = in;
+
+ if (unlikely(ictx->rsizw))
+ return -ERANGE;
+ sctx->count = ictx->rsiz;
+
+ memcpy(sctx->state, ictx->st, sizeof(ictx->st));
+ memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
+ sctx->func = CPACF_KIMD_SHA3_384;
+
+ return 0;
+}
+
+static struct shash_alg sha3_512_alg = {
+ .digestsize = SHA3_512_DIGEST_SIZE,
+ .init = sha3_512_init,
+ .update = s390_sha_update,
+ .final = s390_sha_final,
+ .export = sha3_512_export,
+ .import = sha3_512_import,
+ .descsize = sizeof(struct s390_sha_ctx),
+ .statesize = sizeof(struct sha3_state),
+ .base = {
+ .cra_name = "sha3-512",
+ .cra_driver_name = "sha3-512-s390",
+ .cra_priority = 300,
+ .cra_blocksize = SHA3_512_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+MODULE_ALIAS_CRYPTO("sha3-512");
+
+static int sha3_384_init(struct shash_desc *desc)
+{
+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+
+ memset(sctx->state, 0, sizeof(sctx->state));
+ sctx->count = 0;
+ sctx->func = CPACF_KIMD_SHA3_384;
+
+ return 0;
+}
+
+static struct shash_alg sha3_384_alg = {
+ .digestsize = SHA3_384_DIGEST_SIZE,
+ .init = sha3_384_init,
+ .update = s390_sha_update,
+ .final = s390_sha_final,
+ .export = sha3_512_export, /* same as for 512 */
+ .import = sha3_384_import, /* function code different! */
+ .descsize = sizeof(struct s390_sha_ctx),
+ .statesize = sizeof(struct sha3_state),
+ .base = {
+ .cra_name = "sha3-384",
+ .cra_driver_name = "sha3-384-s390",
+ .cra_priority = 300,
+ .cra_blocksize = SHA3_384_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_sha_ctx),
+ .cra_module = THIS_MODULE,
+ }
+};
+
+MODULE_ALIAS_CRYPTO("sha3-384");
+
+static int __init init(void)
+{
+ int ret;
+
+ if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_512))
+ return -ENODEV;
+ ret = crypto_register_shash(&sha3_512_alg);
+ if (ret < 0)
+ goto out;
+ ret = crypto_register_shash(&sha3_384_alg);
+ if (ret < 0)
+ crypto_unregister_shash(&sha3_512_alg);
+out:
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ crypto_unregister_shash(&sha3_512_alg);
+ crypto_unregister_shash(&sha3_384_alg);
+}
+
+module_cpu_feature_match(S390_CPU_FEATURE_MSA, init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm");