/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:4;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright The Mbed TLS Contributors                                          │
│                                                                              │
│ Licensed under the Apache License, Version 2.0 (the "License");              │
│ you may not use this file except in compliance with the License.             │
│ You may obtain a copy of the License at                                      │
│                                                                              │
│     http://www.apache.org/licenses/LICENSE-2.0                               │
│                                                                              │
│ Unless required by applicable law or agreed to in writing, software          │
│ distributed under the License is distributed on an "AS IS" BASIS,            │
│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.     │
│ See the License for the specific language governing permissions and          │
│ limitations under the License.                                               │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
#include "libc/str/str.h"
#include "third_party/mbedtls/platform.h"
#include "third_party/mbedtls/sha512.h"

asm(".ident\t\"\\n\\n\
Mbed TLS (Apache 2.0)\\n\
Copyright ARM Limited\\n\
Copyright Mbed TLS Contributors\"");
asm(".include \"libc/disclaimer.inc\"");
// clang-format off

/*
 * FIPS-180-2 test vectors
 */
static const unsigned char sha512_test_buf[3][113] =
{
    { "abc" },
    { "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
      "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu" },
    { "" }
};

static const size_t sha512_test_buflen[3] =
{
    3, 112, 1000
};

static const unsigned char sha512_test_sum[][64] =
{
#if !defined(MBEDTLS_SHA512_NO_SHA384)
    /*
     * SHA-384 test vectors
     */
    { 0xCB, 0x00, 0x75, 0x3F, 0x45, 0xA3, 0x5E, 0x8B,
      0xB5, 0xA0, 0x3D, 0x69, 0x9A, 0xC6, 0x50, 0x07,
      0x27, 0x2C, 0x32, 0xAB, 0x0E, 0xDE, 0xD1, 0x63,
      0x1A, 0x8B, 0x60, 0x5A, 0x43, 0xFF, 0x5B, 0xED,
      0x80, 0x86, 0x07, 0x2B, 0xA1, 0xE7, 0xCC, 0x23,
      0x58, 0xBA, 0xEC, 0xA1, 0x34, 0xC8, 0x25, 0xA7 },
    { 0x09, 0x33, 0x0C, 0x33, 0xF7, 0x11, 0x47, 0xE8,
      0x3D, 0x19, 0x2F, 0xC7, 0x82, 0xCD, 0x1B, 0x47,
      0x53, 0x11, 0x1B, 0x17, 0x3B, 0x3B, 0x05, 0xD2,
      0x2F, 0xA0, 0x80, 0x86, 0xE3, 0xB0, 0xF7, 0x12,
      0xFC, 0xC7, 0xC7, 0x1A, 0x55, 0x7E, 0x2D, 0xB9,
      0x66, 0xC3, 0xE9, 0xFA, 0x91, 0x74, 0x60, 0x39 },
    { 0x9D, 0x0E, 0x18, 0x09, 0x71, 0x64, 0x74, 0xCB,
      0x08, 0x6E, 0x83, 0x4E, 0x31, 0x0A, 0x4A, 0x1C,
      0xED, 0x14, 0x9E, 0x9C, 0x00, 0xF2, 0x48, 0x52,
      0x79, 0x72, 0xCE, 0xC5, 0x70, 0x4C, 0x2A, 0x5B,
      0x07, 0xB8, 0xB3, 0xDC, 0x38, 0xEC, 0xC4, 0xEB,
      0xAE, 0x97, 0xDD, 0xD8, 0x7F, 0x3D, 0x89, 0x85 },
#endif /* !MBEDTLS_SHA512_NO_SHA384 */
    /*
     * SHA-512 test vectors
     */
    { 0xDD, 0xAF, 0x35, 0xA1, 0x93, 0x61, 0x7A, 0xBA,
      0xCC, 0x41, 0x73, 0x49, 0xAE, 0x20, 0x41, 0x31,
      0x12, 0xE6, 0xFA, 0x4E, 0x89, 0xA9, 0x7E, 0xA2,
      0x0A, 0x9E, 0xEE, 0xE6, 0x4B, 0x55, 0xD3, 0x9A,
      0x21, 0x92, 0x99, 0x2A, 0x27, 0x4F, 0xC1, 0xA8,
      0x36, 0xBA, 0x3C, 0x23, 0xA3, 0xFE, 0xEB, 0xBD,
      0x45, 0x4D, 0x44, 0x23, 0x64, 0x3C, 0xE8, 0x0E,
      0x2A, 0x9A, 0xC9, 0x4F, 0xA5, 0x4C, 0xA4, 0x9F },
    { 0x8E, 0x95, 0x9B, 0x75, 0xDA, 0xE3, 0x13, 0xDA,
      0x8C, 0xF4, 0xF7, 0x28, 0x14, 0xFC, 0x14, 0x3F,
      0x8F, 0x77, 0x79, 0xC6, 0xEB, 0x9F, 0x7F, 0xA1,
      0x72, 0x99, 0xAE, 0xAD, 0xB6, 0x88, 0x90, 0x18,
      0x50, 0x1D, 0x28, 0x9E, 0x49, 0x00, 0xF7, 0xE4,
      0x33, 0x1B, 0x99, 0xDE, 0xC4, 0xB5, 0x43, 0x3A,
      0xC7, 0xD3, 0x29, 0xEE, 0xB6, 0xDD, 0x26, 0x54,
      0x5E, 0x96, 0xE5, 0x5B, 0x87, 0x4B, 0xE9, 0x09 },
    { 0xE7, 0x18, 0x48, 0x3D, 0x0C, 0xE7, 0x69, 0x64,
      0x4E, 0x2E, 0x42, 0xC7, 0xBC, 0x15, 0xB4, 0x63,
      0x8E, 0x1F, 0x98, 0xB1, 0x3B, 0x20, 0x44, 0x28,
      0x56, 0x32, 0xA8, 0x03, 0xAF, 0xA9, 0x73, 0xEB,
      0xDE, 0x0F, 0xF2, 0x44, 0x87, 0x7E, 0xA6, 0x0A,
      0x4C, 0xB0, 0x43, 0x2C, 0xE5, 0x77, 0xC3, 0x1B,
      0xEB, 0x00, 0x9C, 0x5C, 0x2C, 0x49, 0xAA, 0x2E,
      0x4E, 0xAD, 0xB2, 0x17, 0xAD, 0x8C, 0xC0, 0x9B }
};

/**
 * \brief          The SHA-384 or SHA-512 checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_sha512_self_test( int verbose )
{
    int i, j, k, buflen, ret = 0;
    unsigned char *buf;
    unsigned char sha512sum[64];
    mbedtls_sha512_context ctx;
    buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
    if( NULL == buf )
    {
        if( verbose != 0 )
            mbedtls_printf( "Buffer allocation failed\n" );
        return( 1 );
    }
    mbedtls_sha512_init( &ctx );
    for( i = 0; i < (int) ARRAYLEN(sha512_test_sum); i++ )
    {
        j = i % 3;
#ifndef MBEDTLS_SHA512_NO_SHA384
        k = i < 3;
#else
        k = 0;
#endif
        if( verbose != 0 )
            mbedtls_printf( "  SHA-%d test #%d: ", 512 - k * 128, j + 1 );
        if( ( ret = mbedtls_sha512_starts_ret( &ctx, k ) ) != 0 )
            goto fail;
        if( j == 2 )
        {
            memset( buf, 'a', buflen = 1000 );
            for( j = 0; j < 1000; j++ )
            {
                ret = mbedtls_sha512_update_ret( &ctx, buf, buflen );
                if( ret != 0 )
                    goto fail;
            }
        }
        else
        {
            ret = mbedtls_sha512_update_ret( &ctx, sha512_test_buf[j],
                                             sha512_test_buflen[j] );
            if( ret != 0 )
                goto fail;
        }
        if( ( ret = mbedtls_sha512_finish_ret( &ctx, sha512sum ) ) != 0 )
            goto fail;
        if( timingsafe_bcmp( sha512sum, sha512_test_sum[i], 64 - k * 16 ) != 0 )
        {
            ret = 1;
            goto fail;
        }
        if( verbose != 0 )
            mbedtls_printf( "passed\n" );
    }
    if( verbose != 0 )
        mbedtls_printf( "\n" );
    goto exit;
fail:
    if( verbose != 0 )
        mbedtls_printf( "failed\n" );
exit:
    mbedtls_sha512_free( &ctx );
    mbedtls_free( buf );
    return( ret );
}