--- /dev/null
+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/core_names.h>
+#include <string.h>
+#include <openssl/crypto.h>
+#include <openssl/evp.h>
+#include <openssl/params.h>
+#include "internal/sha3.h"
+#include "internal/core_mkdigest.h"
+#include "internal/provider_algs.h"
+
+/*
+ * Forward declaration of any unique methods implemented here. This is not strictly
+ * necessary for the compiler, but provides an assurance that the signatures
+ * of the functions in the dispatch table are correct.
+ */
+static OSSL_OP_digest_init_fn keccak_init;
+static OSSL_OP_digest_update_fn keccak_update;
+static OSSL_OP_digest_final_fn keccak_final;
+static OSSL_OP_digest_freectx_fn keccak_freectx;
+static OSSL_OP_digest_dupctx_fn keccak_dupctx;
+static OSSL_OP_digest_set_params_fn shake_set_params;
+static sha3_absorb_fn generic_sha3_absorb;
+static sha3_final_fn generic_sha3_final;
+
+#if defined(OPENSSL_CPUID_OBJ) && defined(__s390__) && defined(KECCAK1600_ASM)
+/*
+ * IBM S390X support
+ */
+# include "s390x_arch.h"
+# define S390_SHA3 1
+# define S390_SHA3_CAPABLE(name) \
+ ((OPENSSL_s390xcap_P.kimd[0] & S390X_CAPBIT(S390X_##name)) && \
+ (OPENSSL_s390xcap_P.klmd[0] & S390X_CAPBIT(S390X_##name)))
+
+#endif
+
+static int keccak_init(void *vctx)
+{
+ /* The newctx() handles most of the ctx fixed setup. */
+ sha3_reset((KECCAK1600_CTX *)vctx);
+ return 1;
+}
+
+static int keccak_update(void *vctx, const unsigned char *inp, size_t len)
+{
+ KECCAK1600_CTX *ctx = vctx;
+ const size_t bsz = ctx->block_size;
+ size_t num, rem;
+
+ if (len == 0)
+ return 1;
+
+ /* Is there anything in the buffer already ? */
+ if ((num = ctx->bufsz) != 0) {
+ /* Calculate how much space is left in the buffer */
+ rem = bsz - num;
+ /* If the new input does not fill the buffer then just add it */
+ if (len < rem) {
+ memcpy(ctx->buf + num, inp, len);
+ ctx->bufsz += len;
+ return 1;
+ }
+ /* otherwise fill up the buffer and absorb the buffer */
+ memcpy(ctx->buf + num, inp, rem);
+ /* Update the input pointer */
+ inp += rem;
+ len -= rem;
+ ctx->meth.absorb(ctx, ctx->buf, bsz);
+ ctx->bufsz = 0;
+ }
+ /* Absorb the input - rem = leftover part of the input < blocksize) */
+ rem = ctx->meth.absorb(ctx, inp, len);
+ /* Copy the leftover bit of the input into the buffer */
+ if (rem) {
+ memcpy(ctx->buf, inp + len - rem, rem);
+ ctx->bufsz = rem;
+ }
+ return 1;
+}
+
+static int keccak_final(void *vctx, unsigned char *out, size_t *outl,
+ size_t outsz)
+{
+ int ret;
+ KECCAK1600_CTX *ctx = vctx;
+
+ ret = ctx->meth.final(out, ctx);
+ *outl = ctx->md_size;
+ return ret;
+}
+
+/*-
+ * Generic software version of the absorb() and final().
+ */
+static size_t generic_sha3_absorb(void *vctx, const void *inp, size_t len)
+{
+ KECCAK1600_CTX *ctx = vctx;
+
+ return SHA3_absorb(ctx->A, inp, len, ctx->block_size);
+}
+
+static int generic_sha3_final(unsigned char *md, void *vctx)
+{
+ return sha3_final(md, (KECCAK1600_CTX *)vctx);
+}
+
+static PROV_SHA3_METHOD sha3_generic_md =
+{
+ generic_sha3_absorb,
+ generic_sha3_final
+};
+
+#if defined(S390_SHA3)
+
+static sha3_absorb_fn s390x_sha3_absorb;
+static sha3_final_fn s390x_sha3_final;
+static sha3_final_fn s390x_shake_final;
+
+/*-
+ * The platform specific parts of the absorb() and final() for S390X.
+ */
+static size_t s390x_sha3_absorb(void *vctx, const void *inp, size_t len)
+{
+ KECCAK1600_CTX *ctx = vctx;
+ size_t rem = len % ctx->block_size;
+
+ s390x_kimd(inp, len - rem, ctx->pad, ctx->A);
+ return rem;
+}
+
+static int s390x_sha3_final(unsigned char *md, void *vctx)
+{
+ KECCAK1600_CTX *ctx = vctx;
+
+ s390x_klmd(ctx->buf, ctx->bufsz, NULL, 0, ctx->pad, ctx->A);
+ memcpy(md, ctx->A, ctx->md_size);
+}
+
+static int s390x_shake_final(unsigned char *md, void *vctx)
+{
+ KECCAK1600_CTX *ctx = vctx;
+
+ s390x_klmd(ctx->buf, ctx->bufsz, md, ctx->md_size, ctx->pad, ctx->A);
+ return 1;
+}
+
+static PROV_SHA3_METHOD sha3_s390x_md =
+{
+ s390x_sha3_absorb,
+ s390x_sha3_final
+};
+
+static PROV_SHA3_METHOD shake_s390x_md =
+{
+ s390x_sha3_absorb,
+ s390x_shake_final
+};
+
+# define SHA3_SET_MD(uname, typ) \
+ if (S390_SHA3_CAPABLE(uname)) { \
+ ctx->pad = S390X_##uname; \
+ ctx->meth = typ##_s390x_md; \
+ } else { \
+ ctx->meth = sha3_generic_md; \
+ }
+#else
+# define SHA3_SET_MD(uname, typ) ctx->meth = sha3_generic_md;
+#endif /* S390_SHA3 */
+
+#define SHA3_newctx(typ, uname, name, bitlen, pad) \
+static OSSL_OP_digest_newctx_fn name##_newctx; \
+static void *name##_newctx(void *provctx) \
+{ \
+ KECCAK1600_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
+ \
+ if (ctx == NULL) \
+ return NULL; \
+ sha3_init(ctx, pad, bitlen); \
+ SHA3_SET_MD(name, typ) \
+ return ctx; \
+}
+
+#define KMAC_newctx(uname, bitlen, pad) \
+static OSSL_OP_digest_newctx_fn uname##_newctx; \
+static void *uname##_newctx(void *provctx) \
+{ \
+ KECCAK1600_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
+ \
+ if (ctx == NULL) \
+ return NULL; \
+ keccak_kmac_init(ctx, pad, bitlen); \
+ ctx->meth = sha3_generic_md; \
+ return ctx; \
+}
+
+#define OSSL_FUNC_SHA3_DIGEST(name, bitlen, dgstsize, stparams) \
+static OSSL_OP_digest_size_fn name##_size; \
+static OSSL_OP_digest_block_size_fn name##_block_size; \
+static size_t name##_block_size(void) \
+{ \
+ return SHA3_BLOCKSIZE(bitlen); \
+} \
+static size_t name##_size(void) \
+{ \
+ return dgstsize; \
+} \
+const OSSL_DISPATCH name##_functions[] = { \
+ { OSSL_FUNC_DIGEST_NEWCTX, (void (*)(void))name##_newctx }, \
+ { OSSL_FUNC_DIGEST_INIT, (void (*)(void))keccak_init }, \
+ { OSSL_FUNC_DIGEST_UPDATE, (void (*)(void))keccak_update }, \
+ { OSSL_FUNC_DIGEST_FINAL, (void (*)(void))keccak_final }, \
+ { OSSL_FUNC_DIGEST_FREECTX, (void (*)(void))keccak_freectx }, \
+ { OSSL_FUNC_DIGEST_DUPCTX, (void (*)(void))keccak_dupctx }, \
+ { OSSL_FUNC_DIGEST_SIZE, (void (*)(void))name##_size }, \
+ { OSSL_FUNC_DIGEST_BLOCK_SIZE, (void (*)(void))name##_block_size }, \
+ { OSSL_FUNC_DIGEST_SET_PARAMS, (void (*)(void))stparams },\
+OSSL_FUNC_DIGEST_CONSTRUCT_END
+
+static void keccak_freectx(void *vctx)
+{
+ KECCAK1600_CTX *ctx = (KECCAK1600_CTX *)vctx;
+
+ OPENSSL_clear_free(ctx, sizeof(*ctx));
+}
+
+static void *keccak_dupctx(void *ctx)
+{
+ KECCAK1600_CTX *in = (KECCAK1600_CTX *)ctx;
+ KECCAK1600_CTX *ret = OPENSSL_malloc(sizeof(*ret));
+
+ *ret = *in;
+ return ret;
+}
+
+static int shake_set_params(void *vctx, const OSSL_PARAM params[])
+{
+ const OSSL_PARAM *p;
+ KECCAK1600_CTX *ctx = (KECCAK1600_CTX *)vctx;
+
+ if (ctx != NULL && params != NULL) {
+ p = OSSL_PARAM_locate(params, OSSL_DIGEST_PARAM_XOFLEN);
+ if (p != NULL && !OSSL_PARAM_get_size_t(p, &ctx->md_size))
+ return 0;
+ return 1;
+ }
+ return 0; /* Null Parameter */
+}
+
+#define SHA3(bitlen) \
+ SHA3_newctx(sha3, SHA3_##bitlen, sha3_##bitlen, bitlen, '\x06') \
+ OSSL_FUNC_SHA3_DIGEST(sha3_##bitlen, bitlen, SHA3_MDSIZE(bitlen), NULL)
+
+#define SHAKE(bitlen) \
+ SHA3_newctx(shake, SHAKE_##bitlen, shake_##bitlen, bitlen, '\x1f') \
+ OSSL_FUNC_SHA3_DIGEST(shake_##bitlen, bitlen, SHA3_MDSIZE(bitlen), \
+ shake_set_params)
+#define KMAC(bitlen) \
+ KMAC_newctx(keccak_kmac_##bitlen, bitlen, '\x04') \
+ OSSL_FUNC_SHA3_DIGEST(keccak_kmac_##bitlen, bitlen, KMAC_MDSIZE(bitlen), \
+ shake_set_params)
+
+SHA3(224)
+SHA3(256)
+SHA3(384)
+SHA3(512)
+SHAKE(128)
+SHAKE(256)
+KMAC(128)
+KMAC(256)
projects / openssl.git / blobdiff