435 lines
15 KiB
C
435 lines
15 KiB
C
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/*
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* Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include <openssl/core_names.h>
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#include <openssl/crypto.h>
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#include <openssl/evp.h>
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#include <openssl/params.h>
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#include <openssl/err.h>
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#include <openssl/proverr.h>
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#include "internal/sha3.h"
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#include "prov/digestcommon.h"
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#include "prov/implementations.h"
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#define SHA3_FLAGS PROV_DIGEST_FLAG_ALGID_ABSENT
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#define SHAKE_FLAGS PROV_DIGEST_FLAG_XOF
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#define KMAC_FLAGS PROV_DIGEST_FLAG_XOF
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/*
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* Forward declaration of any unique methods implemented here. This is not strictly
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* necessary for the compiler, but provides an assurance that the signatures
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* of the functions in the dispatch table are correct.
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*/
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static OSSL_FUNC_digest_init_fn keccak_init;
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static OSSL_FUNC_digest_init_fn keccak_init_params;
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static OSSL_FUNC_digest_update_fn keccak_update;
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static OSSL_FUNC_digest_final_fn keccak_final;
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static OSSL_FUNC_digest_freectx_fn keccak_freectx;
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static OSSL_FUNC_digest_dupctx_fn keccak_dupctx;
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static OSSL_FUNC_digest_set_ctx_params_fn shake_set_ctx_params;
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static OSSL_FUNC_digest_settable_ctx_params_fn shake_settable_ctx_params;
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static sha3_absorb_fn generic_sha3_absorb;
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static sha3_final_fn generic_sha3_final;
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#if defined(OPENSSL_CPUID_OBJ) && defined(__s390__) && defined(KECCAK1600_ASM)
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/*
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* IBM S390X support
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*/
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# include "s390x_arch.h"
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# define S390_SHA3 1
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# define S390_SHA3_CAPABLE(name) \
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((OPENSSL_s390xcap_P.kimd[0] & S390X_CAPBIT(S390X_##name)) && \
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(OPENSSL_s390xcap_P.klmd[0] & S390X_CAPBIT(S390X_##name)))
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#endif
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static int keccak_init(void *vctx, ossl_unused const OSSL_PARAM params[])
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{
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if (!ossl_prov_is_running())
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return 0;
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/* The newctx() handles most of the ctx fixed setup. */
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ossl_sha3_reset((KECCAK1600_CTX *)vctx);
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return 1;
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}
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static int keccak_init_params(void *vctx, const OSSL_PARAM params[])
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{
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return keccak_init(vctx, NULL)
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&& shake_set_ctx_params(vctx, params);
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}
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static int keccak_update(void *vctx, const unsigned char *inp, size_t len)
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{
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KECCAK1600_CTX *ctx = vctx;
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const size_t bsz = ctx->block_size;
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size_t num, rem;
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if (len == 0)
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return 1;
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/* Is there anything in the buffer already ? */
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if ((num = ctx->bufsz) != 0) {
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/* Calculate how much space is left in the buffer */
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rem = bsz - num;
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/* If the new input does not fill the buffer then just add it */
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if (len < rem) {
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memcpy(ctx->buf + num, inp, len);
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ctx->bufsz += len;
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return 1;
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}
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/* otherwise fill up the buffer and absorb the buffer */
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memcpy(ctx->buf + num, inp, rem);
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/* Update the input pointer */
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inp += rem;
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len -= rem;
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ctx->meth.absorb(ctx, ctx->buf, bsz);
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ctx->bufsz = 0;
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}
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/* Absorb the input - rem = leftover part of the input < blocksize) */
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rem = ctx->meth.absorb(ctx, inp, len);
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/* Copy the leftover bit of the input into the buffer */
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if (rem) {
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memcpy(ctx->buf, inp + len - rem, rem);
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ctx->bufsz = rem;
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}
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return 1;
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}
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static int keccak_final(void *vctx, unsigned char *out, size_t *outl,
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size_t outsz)
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{
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int ret = 1;
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KECCAK1600_CTX *ctx = vctx;
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if (!ossl_prov_is_running())
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return 0;
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if (outsz > 0)
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ret = ctx->meth.final(out, ctx);
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*outl = ctx->md_size;
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return ret;
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}
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/*-
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* Generic software version of the absorb() and final().
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*/
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static size_t generic_sha3_absorb(void *vctx, const void *inp, size_t len)
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{
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KECCAK1600_CTX *ctx = vctx;
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return SHA3_absorb(ctx->A, inp, len, ctx->block_size);
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}
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static int generic_sha3_final(unsigned char *md, void *vctx)
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{
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return ossl_sha3_final(md, (KECCAK1600_CTX *)vctx);
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}
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static PROV_SHA3_METHOD sha3_generic_md =
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{
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generic_sha3_absorb,
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generic_sha3_final
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};
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#if defined(S390_SHA3)
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static sha3_absorb_fn s390x_sha3_absorb;
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static sha3_final_fn s390x_sha3_final;
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static sha3_final_fn s390x_shake_final;
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/*-
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* The platform specific parts of the absorb() and final() for S390X.
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*/
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static size_t s390x_sha3_absorb(void *vctx, const void *inp, size_t len)
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{
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KECCAK1600_CTX *ctx = vctx;
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size_t rem = len % ctx->block_size;
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s390x_kimd(inp, len - rem, ctx->pad, ctx->A);
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return rem;
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}
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static int s390x_sha3_final(unsigned char *md, void *vctx)
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{
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KECCAK1600_CTX *ctx = vctx;
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if (!ossl_prov_is_running())
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return 0;
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s390x_klmd(ctx->buf, ctx->bufsz, NULL, 0, ctx->pad, ctx->A);
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memcpy(md, ctx->A, ctx->md_size);
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return 1;
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}
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static int s390x_shake_final(unsigned char *md, void *vctx)
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{
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KECCAK1600_CTX *ctx = vctx;
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if (!ossl_prov_is_running())
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return 0;
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s390x_klmd(ctx->buf, ctx->bufsz, md, ctx->md_size, ctx->pad, ctx->A);
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return 1;
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}
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static int s390x_keccakc_final(unsigned char *md, void *vctx, int padding)
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{
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KECCAK1600_CTX *ctx = vctx;
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size_t bsz = ctx->block_size;
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size_t num = ctx->bufsz;
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size_t needed = ctx->md_size;
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if (!ossl_prov_is_running())
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return 0;
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if (ctx->md_size == 0)
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return 1;
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memset(ctx->buf + num, 0, bsz - num);
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ctx->buf[num] = padding;
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ctx->buf[bsz - 1] |= 0x80;
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s390x_kimd(ctx->buf, bsz, ctx->pad, ctx->A);
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num = needed > bsz ? bsz : needed;
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memcpy(md, ctx->A, num);
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needed -= num;
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if (needed > 0)
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s390x_klmd(NULL, 0, md + bsz, needed, ctx->pad | S390X_KLMD_PS, ctx->A);
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return 1;
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}
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static int s390x_keccak_final(unsigned char *md, void *vctx)
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{
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return s390x_keccakc_final(md, vctx, 0x01);
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}
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static int s390x_kmac_final(unsigned char *md, void *vctx)
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{
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return s390x_keccakc_final(md, vctx, 0x04);
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}
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static PROV_SHA3_METHOD sha3_s390x_md =
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{
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s390x_sha3_absorb,
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s390x_sha3_final
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};
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static PROV_SHA3_METHOD keccak_s390x_md =
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{
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s390x_sha3_absorb,
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s390x_keccak_final
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};
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static PROV_SHA3_METHOD shake_s390x_md =
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{
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s390x_sha3_absorb,
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s390x_shake_final
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};
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static PROV_SHA3_METHOD kmac_s390x_md =
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{
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s390x_sha3_absorb,
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s390x_kmac_final
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};
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# define SHA3_SET_MD(uname, typ) \
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if (S390_SHA3_CAPABLE(uname)) { \
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ctx->pad = S390X_##uname; \
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ctx->meth = typ##_s390x_md; \
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} else { \
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ctx->meth = sha3_generic_md; \
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}
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# define KMAC_SET_MD(bitlen) \
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if (S390_SHA3_CAPABLE(SHAKE_##bitlen)) { \
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ctx->pad = S390X_SHAKE_##bitlen; \
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ctx->meth = kmac_s390x_md; \
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} else { \
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ctx->meth = sha3_generic_md; \
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}
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#elif defined(__aarch64__) && defined(KECCAK1600_ASM)
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# include "arm_arch.h"
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static sha3_absorb_fn armsha3_sha3_absorb;
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size_t SHA3_absorb_cext(uint64_t A[5][5], const unsigned char *inp, size_t len,
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size_t r);
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/*-
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* Hardware-assisted ARMv8.2 SHA3 extension version of the absorb()
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*/
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static size_t armsha3_sha3_absorb(void *vctx, const void *inp, size_t len)
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{
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KECCAK1600_CTX *ctx = vctx;
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return SHA3_absorb_cext(ctx->A, inp, len, ctx->block_size);
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}
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static PROV_SHA3_METHOD sha3_ARMSHA3_md =
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{
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armsha3_sha3_absorb,
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generic_sha3_final
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};
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# define SHA3_SET_MD(uname, typ) \
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if (OPENSSL_armcap_P & ARMV8_HAVE_SHA3_AND_WORTH_USING) { \
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ctx->meth = sha3_ARMSHA3_md; \
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} else { \
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ctx->meth = sha3_generic_md; \
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}
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# define KMAC_SET_MD(bitlen) \
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if (OPENSSL_armcap_P & ARMV8_HAVE_SHA3_AND_WORTH_USING) { \
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ctx->meth = sha3_ARMSHA3_md; \
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} else { \
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ctx->meth = sha3_generic_md; \
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}
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#else
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# define SHA3_SET_MD(uname, typ) ctx->meth = sha3_generic_md;
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# define KMAC_SET_MD(bitlen) ctx->meth = sha3_generic_md;
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#endif /* S390_SHA3 */
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#define SHA3_newctx(typ, uname, name, bitlen, pad) \
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static OSSL_FUNC_digest_newctx_fn name##_newctx; \
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static void *name##_newctx(void *provctx) \
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{ \
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KECCAK1600_CTX *ctx = ossl_prov_is_running() ? OPENSSL_zalloc(sizeof(*ctx)) \
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: NULL; \
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\
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if (ctx == NULL) \
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return NULL; \
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ossl_sha3_init(ctx, pad, bitlen); \
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SHA3_SET_MD(uname, typ) \
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return ctx; \
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}
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#define KMAC_newctx(uname, bitlen, pad) \
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static OSSL_FUNC_digest_newctx_fn uname##_newctx; \
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static void *uname##_newctx(void *provctx) \
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{ \
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KECCAK1600_CTX *ctx = ossl_prov_is_running() ? OPENSSL_zalloc(sizeof(*ctx)) \
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: NULL; \
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\
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if (ctx == NULL) \
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return NULL; \
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ossl_keccak_kmac_init(ctx, pad, bitlen); \
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KMAC_SET_MD(bitlen) \
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return ctx; \
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}
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#define PROV_FUNC_SHA3_DIGEST_COMMON(name, bitlen, blksize, dgstsize, flags) \
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PROV_FUNC_DIGEST_GET_PARAM(name, blksize, dgstsize, flags) \
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const OSSL_DISPATCH ossl_##name##_functions[] = { \
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{ OSSL_FUNC_DIGEST_NEWCTX, (void (*)(void))name##_newctx }, \
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{ OSSL_FUNC_DIGEST_UPDATE, (void (*)(void))keccak_update }, \
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{ OSSL_FUNC_DIGEST_FINAL, (void (*)(void))keccak_final }, \
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{ OSSL_FUNC_DIGEST_FREECTX, (void (*)(void))keccak_freectx }, \
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{ OSSL_FUNC_DIGEST_DUPCTX, (void (*)(void))keccak_dupctx }, \
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PROV_DISPATCH_FUNC_DIGEST_GET_PARAMS(name)
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#define PROV_FUNC_SHA3_DIGEST(name, bitlen, blksize, dgstsize, flags) \
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PROV_FUNC_SHA3_DIGEST_COMMON(name, bitlen, blksize, dgstsize, flags), \
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{ OSSL_FUNC_DIGEST_INIT, (void (*)(void))keccak_init }, \
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PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END
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#define PROV_FUNC_SHAKE_DIGEST(name, bitlen, blksize, dgstsize, flags) \
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PROV_FUNC_SHA3_DIGEST_COMMON(name, bitlen, blksize, dgstsize, flags), \
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{ OSSL_FUNC_DIGEST_INIT, (void (*)(void))keccak_init_params }, \
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{ OSSL_FUNC_DIGEST_SET_CTX_PARAMS, (void (*)(void))shake_set_ctx_params }, \
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{ OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS, \
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(void (*)(void))shake_settable_ctx_params }, \
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PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END
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static void keccak_freectx(void *vctx)
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{
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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 = ossl_prov_is_running() ? OPENSSL_malloc(sizeof(*ret))
|
||
|
|
: NULL;
|
||
|
|
|
||
|
|
if (ret != NULL)
|
||
|
|
*ret = *in;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const OSSL_PARAM known_shake_settable_ctx_params[] = {
|
||
|
|
{OSSL_DIGEST_PARAM_XOFLEN, OSSL_PARAM_UNSIGNED_INTEGER, NULL, 0, 0},
|
||
|
|
OSSL_PARAM_END
|
||
|
|
};
|
||
|
|
static const OSSL_PARAM *shake_settable_ctx_params(ossl_unused void *ctx,
|
||
|
|
ossl_unused void *provctx)
|
||
|
|
{
|
||
|
|
return known_shake_settable_ctx_params;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int shake_set_ctx_params(void *vctx, const OSSL_PARAM params[])
|
||
|
|
{
|
||
|
|
const OSSL_PARAM *p;
|
||
|
|
KECCAK1600_CTX *ctx = (KECCAK1600_CTX *)vctx;
|
||
|
|
|
||
|
|
if (ctx == NULL)
|
||
|
|
return 0;
|
||
|
|
if (params == NULL)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
p = OSSL_PARAM_locate_const(params, OSSL_DIGEST_PARAM_XOFLEN);
|
||
|
|
if (p != NULL && !OSSL_PARAM_get_size_t(p, &ctx->md_size)) {
|
||
|
|
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define IMPLEMENT_SHA3_functions(bitlen) \
|
||
|
|
SHA3_newctx(sha3, SHA3_##bitlen, sha3_##bitlen, bitlen, '\x06') \
|
||
|
|
PROV_FUNC_SHA3_DIGEST(sha3_##bitlen, bitlen, \
|
||
|
|
SHA3_BLOCKSIZE(bitlen), SHA3_MDSIZE(bitlen), \
|
||
|
|
SHA3_FLAGS)
|
||
|
|
|
||
|
|
#define IMPLEMENT_KECCAK_functions(bitlen) \
|
||
|
|
SHA3_newctx(keccak, KECCAK_##bitlen, keccak_##bitlen, bitlen, '\x01') \
|
||
|
|
PROV_FUNC_SHA3_DIGEST(keccak_##bitlen, bitlen, \
|
||
|
|
SHA3_BLOCKSIZE(bitlen), SHA3_MDSIZE(bitlen), \
|
||
|
|
SHA3_FLAGS)
|
||
|
|
|
||
|
|
#define IMPLEMENT_SHAKE_functions(bitlen) \
|
||
|
|
SHA3_newctx(shake, SHAKE_##bitlen, shake_##bitlen, bitlen, '\x1f') \
|
||
|
|
PROV_FUNC_SHAKE_DIGEST(shake_##bitlen, bitlen, \
|
||
|
|
SHA3_BLOCKSIZE(bitlen), SHA3_MDSIZE(bitlen), \
|
||
|
|
SHAKE_FLAGS)
|
||
|
|
#define IMPLEMENT_KMAC_functions(bitlen) \
|
||
|
|
KMAC_newctx(keccak_kmac_##bitlen, bitlen, '\x04') \
|
||
|
|
PROV_FUNC_SHAKE_DIGEST(keccak_kmac_##bitlen, bitlen, \
|
||
|
|
SHA3_BLOCKSIZE(bitlen), KMAC_MDSIZE(bitlen), \
|
||
|
|
KMAC_FLAGS)
|
||
|
|
|
||
|
|
/* ossl_sha3_224_functions */
|
||
|
|
IMPLEMENT_SHA3_functions(224)
|
||
|
|
/* ossl_sha3_256_functions */
|
||
|
|
IMPLEMENT_SHA3_functions(256)
|
||
|
|
/* ossl_sha3_384_functions */
|
||
|
|
IMPLEMENT_SHA3_functions(384)
|
||
|
|
/* ossl_sha3_512_functions */
|
||
|
|
IMPLEMENT_SHA3_functions(512)
|
||
|
|
/* ossl_keccak_224_functions */
|
||
|
|
IMPLEMENT_KECCAK_functions(224)
|
||
|
|
/* ossl_keccak_256_functions */
|
||
|
|
IMPLEMENT_KECCAK_functions(256)
|
||
|
|
/* ossl_keccak_384_functions */
|
||
|
|
IMPLEMENT_KECCAK_functions(384)
|
||
|
|
/* ossl_keccak_512_functions */
|
||
|
|
IMPLEMENT_KECCAK_functions(512)
|
||
|
|
/* ossl_shake_128_functions */
|
||
|
|
IMPLEMENT_SHAKE_functions(128)
|
||
|
|
/* ossl_shake_256_functions */
|
||
|
|
IMPLEMENT_SHAKE_functions(256)
|
||
|
|
/* ossl_keccak_kmac_128_functions */
|
||
|
|
IMPLEMENT_KMAC_functions(128)
|
||
|
|
/* ossl_keccak_kmac_256_functions */
|
||
|
|
IMPLEMENT_KMAC_functions(256)
|