410 lines
13 KiB
C
410 lines
13 KiB
C
/*
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* Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 <stdio.h>
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#include <string.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include "crypto/evp.h"
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#include "evp_local.h"
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size_t SHA3_absorb(uint64_t A[5][5], const unsigned char *inp, size_t len,
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size_t r);
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void SHA3_squeeze(uint64_t A[5][5], unsigned char *out, size_t len, size_t r);
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#define KECCAK1600_WIDTH 1600
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typedef struct {
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uint64_t A[5][5];
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size_t block_size; /* cached ctx->digest->block_size */
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size_t md_size; /* output length, variable in XOF */
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size_t num; /* used bytes in below buffer */
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unsigned char buf[KECCAK1600_WIDTH / 8 - 32];
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unsigned char pad;
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} KECCAK1600_CTX;
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static int init(EVP_MD_CTX *evp_ctx, unsigned char pad)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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size_t bsz = evp_ctx->digest->block_size;
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if (bsz <= sizeof(ctx->buf)) {
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memset(ctx->A, 0, sizeof(ctx->A));
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ctx->num = 0;
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ctx->block_size = bsz;
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ctx->md_size = evp_ctx->digest->md_size;
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ctx->pad = pad;
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return 1;
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}
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return 0;
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}
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static int sha3_init(EVP_MD_CTX *evp_ctx)
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{
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return init(evp_ctx, '\x06');
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}
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static int shake_init(EVP_MD_CTX *evp_ctx)
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{
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return init(evp_ctx, '\x1f');
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}
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static int sha3_update(EVP_MD_CTX *evp_ctx, const void *_inp, size_t len)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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const unsigned char *inp = _inp;
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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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if ((num = ctx->num) != 0) { /* process intermediate buffer? */
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rem = bsz - num;
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if (len < rem) {
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memcpy(ctx->buf + num, inp, len);
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ctx->num += len;
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return 1;
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}
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/*
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* We have enough data to fill or overflow the intermediate
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* buffer. So we append |rem| bytes and process the block,
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* leaving the rest for later processing...
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*/
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memcpy(ctx->buf + num, inp, rem);
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inp += rem, len -= rem;
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(void)SHA3_absorb(ctx->A, ctx->buf, bsz, bsz);
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ctx->num = 0;
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/* ctx->buf is processed, ctx->num is guaranteed to be zero */
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}
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if (len >= bsz)
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rem = SHA3_absorb(ctx->A, inp, len, bsz);
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else
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rem = len;
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if (rem) {
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memcpy(ctx->buf, inp + len - rem, rem);
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ctx->num = rem;
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}
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return 1;
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}
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static int sha3_final(EVP_MD_CTX *evp_ctx, unsigned char *md)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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size_t bsz = ctx->block_size;
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size_t num = ctx->num;
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if (ctx->md_size == 0)
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return 1;
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/*
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* Pad the data with 10*1. Note that |num| can be |bsz - 1|
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* in which case both byte operations below are performed on
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* same byte...
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*/
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memset(ctx->buf + num, 0, bsz - num);
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ctx->buf[num] = ctx->pad;
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ctx->buf[bsz - 1] |= 0x80;
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(void)SHA3_absorb(ctx->A, ctx->buf, bsz, bsz);
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SHA3_squeeze(ctx->A, md, ctx->md_size, bsz);
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return 1;
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}
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static int shake_ctrl(EVP_MD_CTX *evp_ctx, int cmd, int p1, void *p2)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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switch (cmd) {
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case EVP_MD_CTRL_XOF_LEN:
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ctx->md_size = p1;
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return 1;
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default:
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return 0;
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}
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}
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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 S390X_SHA3_FC(ctx) ((ctx)->pad)
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# define S390X_sha3_224_CAPABLE ((OPENSSL_s390xcap_P.kimd[0] & \
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S390X_CAPBIT(S390X_SHA3_224)) && \
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(OPENSSL_s390xcap_P.klmd[0] & \
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S390X_CAPBIT(S390X_SHA3_224)))
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# define S390X_sha3_256_CAPABLE ((OPENSSL_s390xcap_P.kimd[0] & \
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S390X_CAPBIT(S390X_SHA3_256)) && \
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(OPENSSL_s390xcap_P.klmd[0] & \
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S390X_CAPBIT(S390X_SHA3_256)))
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# define S390X_sha3_384_CAPABLE ((OPENSSL_s390xcap_P.kimd[0] & \
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S390X_CAPBIT(S390X_SHA3_384)) && \
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(OPENSSL_s390xcap_P.klmd[0] & \
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S390X_CAPBIT(S390X_SHA3_384)))
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# define S390X_sha3_512_CAPABLE ((OPENSSL_s390xcap_P.kimd[0] & \
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S390X_CAPBIT(S390X_SHA3_512)) && \
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(OPENSSL_s390xcap_P.klmd[0] & \
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S390X_CAPBIT(S390X_SHA3_512)))
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# define S390X_shake128_CAPABLE ((OPENSSL_s390xcap_P.kimd[0] & \
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S390X_CAPBIT(S390X_SHAKE_128)) && \
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(OPENSSL_s390xcap_P.klmd[0] & \
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S390X_CAPBIT(S390X_SHAKE_128)))
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# define S390X_shake256_CAPABLE ((OPENSSL_s390xcap_P.kimd[0] & \
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S390X_CAPBIT(S390X_SHAKE_256)) && \
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(OPENSSL_s390xcap_P.klmd[0] & \
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S390X_CAPBIT(S390X_SHAKE_256)))
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/* Convert md-size to block-size. */
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# define S390X_KECCAK1600_BSZ(n) ((KECCAK1600_WIDTH - ((n) << 1)) >> 3)
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static int s390x_sha3_init(EVP_MD_CTX *evp_ctx)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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const size_t bsz = evp_ctx->digest->block_size;
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/*-
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* KECCAK1600_CTX structure's pad field is used to store the KIMD/KLMD
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* function code.
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*/
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switch (bsz) {
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case S390X_KECCAK1600_BSZ(224):
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ctx->pad = S390X_SHA3_224;
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break;
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case S390X_KECCAK1600_BSZ(256):
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ctx->pad = S390X_SHA3_256;
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break;
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case S390X_KECCAK1600_BSZ(384):
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ctx->pad = S390X_SHA3_384;
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break;
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case S390X_KECCAK1600_BSZ(512):
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ctx->pad = S390X_SHA3_512;
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break;
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default:
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return 0;
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}
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memset(ctx->A, 0, sizeof(ctx->A));
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ctx->num = 0;
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ctx->block_size = bsz;
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ctx->md_size = evp_ctx->digest->md_size;
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return 1;
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}
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static int s390x_shake_init(EVP_MD_CTX *evp_ctx)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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const size_t bsz = evp_ctx->digest->block_size;
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/*-
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* KECCAK1600_CTX structure's pad field is used to store the KIMD/KLMD
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* function code.
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*/
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switch (bsz) {
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case S390X_KECCAK1600_BSZ(128):
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ctx->pad = S390X_SHAKE_128;
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break;
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case S390X_KECCAK1600_BSZ(256):
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ctx->pad = S390X_SHAKE_256;
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break;
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default:
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return 0;
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}
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memset(ctx->A, 0, sizeof(ctx->A));
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ctx->num = 0;
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ctx->block_size = bsz;
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ctx->md_size = evp_ctx->digest->md_size;
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return 1;
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}
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static int s390x_sha3_update(EVP_MD_CTX *evp_ctx, const void *_inp, size_t len)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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const unsigned char *inp = _inp;
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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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if ((num = ctx->num) != 0) {
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rem = bsz - num;
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if (len < rem) {
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memcpy(ctx->buf + num, inp, len);
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ctx->num += len;
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return 1;
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}
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memcpy(ctx->buf + num, inp, rem);
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inp += rem;
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len -= rem;
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s390x_kimd(ctx->buf, bsz, ctx->pad, ctx->A);
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ctx->num = 0;
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}
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rem = len % bsz;
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s390x_kimd(inp, len - rem, ctx->pad, ctx->A);
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if (rem) {
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memcpy(ctx->buf, inp + len - rem, rem);
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ctx->num = rem;
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}
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return 1;
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}
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static int s390x_sha3_final(EVP_MD_CTX *evp_ctx, unsigned char *md)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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s390x_klmd(ctx->buf, ctx->num, 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(EVP_MD_CTX *evp_ctx, unsigned char *md)
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{
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KECCAK1600_CTX *ctx = evp_ctx->md_data;
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s390x_klmd(ctx->buf, ctx->num, md, ctx->md_size, ctx->pad, ctx->A);
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return 1;
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}
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# define EVP_MD_SHA3(bitlen) \
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const EVP_MD *EVP_sha3_##bitlen(void) \
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{ \
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static const EVP_MD s390x_sha3_##bitlen##_md = { \
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NID_sha3_##bitlen, \
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NID_RSA_SHA3_##bitlen, \
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bitlen / 8, \
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EVP_MD_FLAG_DIGALGID_ABSENT, \
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s390x_sha3_init, \
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s390x_sha3_update, \
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s390x_sha3_final, \
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NULL, \
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NULL, \
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(KECCAK1600_WIDTH - bitlen * 2) / 8, \
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sizeof(KECCAK1600_CTX), \
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}; \
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static const EVP_MD sha3_##bitlen##_md = { \
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NID_sha3_##bitlen, \
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NID_RSA_SHA3_##bitlen, \
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bitlen / 8, \
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EVP_MD_FLAG_DIGALGID_ABSENT, \
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sha3_init, \
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sha3_update, \
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sha3_final, \
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NULL, \
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NULL, \
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(KECCAK1600_WIDTH - bitlen * 2) / 8, \
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sizeof(KECCAK1600_CTX), \
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}; \
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return S390X_sha3_##bitlen##_CAPABLE ? \
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&s390x_sha3_##bitlen##_md : \
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&sha3_##bitlen##_md; \
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}
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# define EVP_MD_SHAKE(bitlen) \
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const EVP_MD *EVP_shake##bitlen(void) \
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{ \
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static const EVP_MD s390x_shake##bitlen##_md = { \
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NID_shake##bitlen, \
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0, \
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bitlen / 8, \
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EVP_MD_FLAG_XOF, \
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s390x_shake_init, \
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s390x_sha3_update, \
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s390x_shake_final, \
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NULL, \
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NULL, \
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(KECCAK1600_WIDTH - bitlen * 2) / 8, \
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sizeof(KECCAK1600_CTX), \
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shake_ctrl \
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}; \
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static const EVP_MD shake##bitlen##_md = { \
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NID_shake##bitlen, \
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0, \
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bitlen / 8, \
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EVP_MD_FLAG_XOF, \
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shake_init, \
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sha3_update, \
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sha3_final, \
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NULL, \
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NULL, \
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(KECCAK1600_WIDTH - bitlen * 2) / 8, \
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sizeof(KECCAK1600_CTX), \
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shake_ctrl \
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}; \
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return S390X_shake##bitlen##_CAPABLE ? \
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&s390x_shake##bitlen##_md : \
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&shake##bitlen##_md; \
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}
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#else
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# define EVP_MD_SHA3(bitlen) \
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const EVP_MD *EVP_sha3_##bitlen(void) \
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{ \
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static const EVP_MD sha3_##bitlen##_md = { \
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NID_sha3_##bitlen, \
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NID_RSA_SHA3_##bitlen, \
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bitlen / 8, \
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EVP_MD_FLAG_DIGALGID_ABSENT, \
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sha3_init, \
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sha3_update, \
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sha3_final, \
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NULL, \
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NULL, \
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(KECCAK1600_WIDTH - bitlen * 2) / 8, \
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sizeof(KECCAK1600_CTX), \
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}; \
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return &sha3_##bitlen##_md; \
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}
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# define EVP_MD_SHAKE(bitlen) \
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const EVP_MD *EVP_shake##bitlen(void) \
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{ \
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static const EVP_MD shake##bitlen##_md = { \
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NID_shake##bitlen, \
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0, \
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bitlen / 8, \
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EVP_MD_FLAG_XOF, \
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shake_init, \
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sha3_update, \
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sha3_final, \
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NULL, \
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NULL, \
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(KECCAK1600_WIDTH - bitlen * 2) / 8, \
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sizeof(KECCAK1600_CTX), \
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shake_ctrl \
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}; \
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return &shake##bitlen##_md; \
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}
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#endif
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EVP_MD_SHA3(224)
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EVP_MD_SHA3(256)
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EVP_MD_SHA3(384)
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EVP_MD_SHA3(512)
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EVP_MD_SHAKE(128)
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EVP_MD_SHAKE(256)
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