xref: /isa-l_crypto/sha1_mb/sha1_ctx_base.c (revision 8cb7fe780eac8ee5f1e0aa3ca37466e89c673ccd)

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  modification, are permitted provided that the following conditions
  are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
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      notice, this list of conditions and the following disclaimer in
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      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include <stdint.h>
#include <string.h>
#include "sha1_mb_internal.h"
#include "memcpy_inline.h"
#include "endian_helper.h"

#ifdef _MSC_VER
#include <intrin.h>
#define inline __inline
#endif

#if (__GNUC__ >= 11)
#define OPT_FIX __attribute__((noipa))
#else
#define OPT_FIX
#endif

#define F1(b, c, d) (d ^ (b & (c ^ d)))
#define F2(b, c, d) (b ^ c ^ d)
#define F3(b, c, d) ((b & c) | (d & (b | c)))
#define F4(b, c, d) (b ^ c ^ d)

#define rol32(x, r) (((x) << (r)) ^ ((x) >> (32 - (r))))

#define W(x) w[(x) & 15]

#define step00_19(i, a, b, c, d, e)                                                                \
        if (i > 15)                                                                                \
                W(i) = rol32(W(i - 3) ^ W(i - 8) ^ W(i - 14) ^ W(i - 16), 1);                      \
        else                                                                                       \
                W(i) = to_be32(ww[i]);                                                             \
        e += rol32(a, 5) + F1(b, c, d) + 0x5A827999 + W(i);                                        \
        b = rol32(b, 30)

#define step20_39(i, a, b, c, d, e)                                                                \
        W(i) = rol32(W(i - 3) ^ W(i - 8) ^ W(i - 14) ^ W(i - 16), 1);                              \
        e += rol32(a, 5) + F2(b, c, d) + 0x6ED9EBA1 + W(i);                                        \
        b = rol32(b, 30)

#define step40_59(i, a, b, c, d, e)                                                                \
        W(i) = rol32(W(i - 3) ^ W(i - 8) ^ W(i - 14) ^ W(i - 16), 1);                              \
        e += rol32(a, 5) + F3(b, c, d) + 0x8F1BBCDC + W(i);                                        \
        b = rol32(b, 30)

#define step60_79(i, a, b, c, d, e)                                                                \
        W(i) = rol32(W(i - 3) ^ W(i - 8) ^ W(i - 14) ^ W(i - 16), 1);                              \
        e += rol32(a, 5) + F4(b, c, d) + 0xCA62C1D6 + W(i);                                        \
        b = rol32(b, 30)

static void
sha1_init(ISAL_SHA1_HASH_CTX *ctx, const void *buffer, uint32_t len);
static void
sha1_update(ISAL_SHA1_HASH_CTX *ctx, const void *buffer, uint32_t len);
static void
sha1_final(ISAL_SHA1_HASH_CTX *ctx);
static void OPT_FIX
sha1_single(const void *data, uint32_t digest[]);
static inline void
hash_init_digest(ISAL_SHA1_WORD_T *digest);

void
_sha1_ctx_mgr_init_base(ISAL_SHA1_HASH_CTX_MGR *mgr)
{
}

ISAL_SHA1_HASH_CTX *
_sha1_ctx_mgr_submit_base(ISAL_SHA1_HASH_CTX_MGR *mgr, ISAL_SHA1_HASH_CTX *ctx, const void *buffer,
                          uint32_t len, ISAL_HASH_CTX_FLAG flags)
{

        if (flags & (~ISAL_HASH_ENTIRE)) {
                // User should not pass anything other than FIRST, UPDATE, or LAST
                ctx->error = ISAL_HASH_CTX_ERROR_INVALID_FLAGS;
                return ctx;
        }

        if ((ctx->status & ISAL_HASH_CTX_STS_PROCESSING) && (flags == ISAL_HASH_ENTIRE)) {
                // Cannot submit a new entire job to a currently processing job.
                ctx->error = ISAL_HASH_CTX_ERROR_ALREADY_PROCESSING;
                return ctx;
        }

        if ((ctx->status & ISAL_HASH_CTX_STS_COMPLETE) && !(flags & ISAL_HASH_FIRST)) {
                // Cannot update a finished job.
                ctx->error = ISAL_HASH_CTX_ERROR_ALREADY_COMPLETED;
                return ctx;
        }

        if (flags == ISAL_HASH_FIRST) {

                sha1_init(ctx, buffer, len);
                sha1_update(ctx, buffer, len);
        }

        if (flags == ISAL_HASH_UPDATE) {
                sha1_update(ctx, buffer, len);
        }

        if (flags == ISAL_HASH_LAST) {
                sha1_update(ctx, buffer, len);
                sha1_final(ctx);
        }

        if (flags == ISAL_HASH_ENTIRE) {
                sha1_init(ctx, buffer, len);
                sha1_update(ctx, buffer, len);
                sha1_final(ctx);
        }

        return ctx;
}

ISAL_SHA1_HASH_CTX *
_sha1_ctx_mgr_flush_base(ISAL_SHA1_HASH_CTX_MGR *mgr)
{
        return NULL;
}

static void
sha1_init(ISAL_SHA1_HASH_CTX *ctx, const void *buffer, uint32_t len)
{
        // Init digest
        hash_init_digest(ctx->job.result_digest);

        // Reset byte counter
        ctx->total_length = 0;

        // Clear extra blocks
        ctx->partial_block_buffer_length = 0;

        // If we made it here, there were no errors during this call to submit
        ctx->error = ISAL_HASH_CTX_ERROR_NONE;

        // Mark it as processing
        ctx->status = ISAL_HASH_CTX_STS_PROCESSING;
}

static void
sha1_update(ISAL_SHA1_HASH_CTX *ctx, const void *buffer, uint32_t len)
{
        uint32_t remain_len = len;
        uint32_t *digest = ctx->job.result_digest;

        // Advance byte counter
        ctx->total_length += len;

        // If there is anything currently buffered in the extra blocks, append to it until it
        // contains a whole block. Or if the user's buffer contains less than a whole block, append
        // as much as possible to the extra block.
        if ((ctx->partial_block_buffer_length) | (remain_len < ISAL_SHA1_BLOCK_SIZE)) {
                // Compute how many bytes to copy from user buffer into extra block
                uint32_t copy_len = ISAL_SHA1_BLOCK_SIZE - ctx->partial_block_buffer_length;
                if (remain_len < copy_len) {
                        copy_len = remain_len;
                }

                if (copy_len) {
                        // Copy and update relevant pointers and counters
                        memcpy_fixedlen(
                                &ctx->partial_block_buffer[ctx->partial_block_buffer_length],
                                buffer, copy_len);

                        ctx->partial_block_buffer_length += copy_len;
                        remain_len -= copy_len;
                        buffer = (void *) ((uint8_t *) buffer + copy_len);
                }
                // The extra block should never contain more than 1 block here
                assert(ctx->partial_block_buffer_length <= ISAL_SHA1_BLOCK_SIZE);

                // If the extra block buffer contains exactly 1 block, it can be hashed.
                if (ctx->partial_block_buffer_length >= ISAL_SHA1_BLOCK_SIZE) {
                        ctx->partial_block_buffer_length = 0;
                        sha1_single(ctx->partial_block_buffer, digest);
                }
        }
        // If the extra blocks are empty, begin hashing what remains in the user's buffer.
        if (ctx->partial_block_buffer_length == 0) {
                while (remain_len >= ISAL_SHA1_BLOCK_SIZE) {
                        sha1_single(buffer, digest);
                        buffer = (void *) ((uint8_t *) buffer + ISAL_SHA1_BLOCK_SIZE);
                        remain_len -= ISAL_SHA1_BLOCK_SIZE;
                }
        }

        if (remain_len > 0) {
                memcpy_fixedlen(&ctx->partial_block_buffer, buffer, remain_len);
                ctx->partial_block_buffer_length = remain_len;
        }

        ctx->status = ISAL_HASH_CTX_STS_IDLE;
        return;
}

static void
sha1_final(ISAL_SHA1_HASH_CTX *ctx)
{
        const void *buffer = ctx->partial_block_buffer;
        uint32_t i = ctx->partial_block_buffer_length;
        uint8_t buf[2 * ISAL_SHA1_BLOCK_SIZE];
        uint32_t *digest = ctx->job.result_digest;

        memcpy(buf, buffer, i);
        buf[i++] = 0x80;
        for (uint32_t j = i; j < (2 * ISAL_SHA1_BLOCK_SIZE); j++) {
                buf[j] = 0;
        }

        if (i > ISAL_SHA1_BLOCK_SIZE - ISAL_SHA1_PADLENGTHFIELD_SIZE) {
                i = 2 * ISAL_SHA1_BLOCK_SIZE;
        } else {
                i = ISAL_SHA1_BLOCK_SIZE;
        }

        *(uint64_t *) (buf + i - 8) = to_be64((uint64_t) ctx->total_length * 8);

        sha1_single(buf, digest);
        if (i == 2 * ISAL_SHA1_BLOCK_SIZE) {
                sha1_single(buf + ISAL_SHA1_BLOCK_SIZE, digest);
        }

        ctx->status = ISAL_HASH_CTX_STS_COMPLETE;
}

void
sha1_single(const void *data, uint32_t digest[])
{
        uint32_t a, b, c, d, e;
        uint32_t w[16] = { 0 };
        uint32_t *ww = (uint32_t *) data;

        a = digest[0];
        b = digest[1];
        c = digest[2];
        d = digest[3];
        e = digest[4];

        step00_19(0, a, b, c, d, e);
        step00_19(1, e, a, b, c, d);
        step00_19(2, d, e, a, b, c);
        step00_19(3, c, d, e, a, b);
        step00_19(4, b, c, d, e, a);
        step00_19(5, a, b, c, d, e);
        step00_19(6, e, a, b, c, d);
        step00_19(7, d, e, a, b, c);
        step00_19(8, c, d, e, a, b);
        step00_19(9, b, c, d, e, a);
        step00_19(10, a, b, c, d, e);
        step00_19(11, e, a, b, c, d);
        step00_19(12, d, e, a, b, c);
        step00_19(13, c, d, e, a, b);
        step00_19(14, b, c, d, e, a);
        step00_19(15, a, b, c, d, e);
        step00_19(16, e, a, b, c, d);
        step00_19(17, d, e, a, b, c);
        step00_19(18, c, d, e, a, b);
        step00_19(19, b, c, d, e, a);

        step20_39(20, a, b, c, d, e);
        step20_39(21, e, a, b, c, d);
        step20_39(22, d, e, a, b, c);
        step20_39(23, c, d, e, a, b);
        step20_39(24, b, c, d, e, a);
        step20_39(25, a, b, c, d, e);
        step20_39(26, e, a, b, c, d);
        step20_39(27, d, e, a, b, c);
        step20_39(28, c, d, e, a, b);
        step20_39(29, b, c, d, e, a);
        step20_39(30, a, b, c, d, e);
        step20_39(31, e, a, b, c, d);
        step20_39(32, d, e, a, b, c);
        step20_39(33, c, d, e, a, b);
        step20_39(34, b, c, d, e, a);
        step20_39(35, a, b, c, d, e);
        step20_39(36, e, a, b, c, d);
        step20_39(37, d, e, a, b, c);
        step20_39(38, c, d, e, a, b);
        step20_39(39, b, c, d, e, a);

        step40_59(40, a, b, c, d, e);
        step40_59(41, e, a, b, c, d);
        step40_59(42, d, e, a, b, c);
        step40_59(43, c, d, e, a, b);
        step40_59(44, b, c, d, e, a);
        step40_59(45, a, b, c, d, e);
        step40_59(46, e, a, b, c, d);
        step40_59(47, d, e, a, b, c);
        step40_59(48, c, d, e, a, b);
        step40_59(49, b, c, d, e, a);
        step40_59(50, a, b, c, d, e);
        step40_59(51, e, a, b, c, d);
        step40_59(52, d, e, a, b, c);
        step40_59(53, c, d, e, a, b);
        step40_59(54, b, c, d, e, a);
        step40_59(55, a, b, c, d, e);
        step40_59(56, e, a, b, c, d);
        step40_59(57, d, e, a, b, c);
        step40_59(58, c, d, e, a, b);
        step40_59(59, b, c, d, e, a);

        step60_79(60, a, b, c, d, e);
        step60_79(61, e, a, b, c, d);
        step60_79(62, d, e, a, b, c);
        step60_79(63, c, d, e, a, b);
        step60_79(64, b, c, d, e, a);
        step60_79(65, a, b, c, d, e);
        step60_79(66, e, a, b, c, d);
        step60_79(67, d, e, a, b, c);
        step60_79(68, c, d, e, a, b);
        step60_79(69, b, c, d, e, a);
        step60_79(70, a, b, c, d, e);
        step60_79(71, e, a, b, c, d);
        step60_79(72, d, e, a, b, c);
        step60_79(73, c, d, e, a, b);
        step60_79(74, b, c, d, e, a);
        step60_79(75, a, b, c, d, e);
        step60_79(76, e, a, b, c, d);
        step60_79(77, d, e, a, b, c);
        step60_79(78, c, d, e, a, b);
        step60_79(79, b, c, d, e, a);

        digest[0] += a;
        digest[1] += b;
        digest[2] += c;
        digest[3] += d;
        digest[4] += e;
}

static inline void
hash_init_digest(ISAL_SHA1_WORD_T *digest)
{
        static const ISAL_SHA1_WORD_T hash_initial_digest[ISAL_SHA1_DIGEST_NWORDS] = {
                ISAL_SHA1_INITIAL_DIGEST
        };
        memcpy_fixedlen(digest, hash_initial_digest, sizeof(hash_initial_digest));
}

struct slver {
        uint16_t snum;
        uint8_t ver;
        uint8_t core;
};

struct slver _sha1_ctx_mgr_init_base_slver_00000192;
struct slver _sha1_ctx_mgr_init_base_slver = { 0x0192, 0x00, 0x00 };

struct slver _sha1_ctx_mgr_submit_base_slver_00000193;
struct slver _sha1_ctx_mgr_submit_base_slver = { 0x0193, 0x00, 0x00 };

struct slver _sha1_ctx_mgr_flush_base_slver_00000194;
struct slver _sha1_ctx_mgr_flush_base_slver = { 0x0194, 0x00, 0x00 };