/*
 * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (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 <stdio.h>
#include <string.h>
#include <stdlib.h>

#include <openssl/sha.h>
#include <openssl/evp.h>

static const unsigned char app_b1[SHA256_DIGEST_LENGTH] = {
    0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea,
    0x41, 0x41, 0x40, 0xde, 0x5d, 0xae, 0x22, 0x23,
    0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,
    0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad
};

static const unsigned char app_b2[SHA256_DIGEST_LENGTH] = {
    0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8,
    0xe5, 0xc0, 0x26, 0x93, 0x0c, 0x3e, 0x60, 0x39,
    0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67,
    0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1
};

static const unsigned char app_b3[SHA256_DIGEST_LENGTH] = {
    0xcd, 0xc7, 0x6e, 0x5c, 0x99, 0x14, 0xfb, 0x92,
    0x81, 0xa1, 0xc7, 0xe2, 0x84, 0xd7, 0x3e, 0x67,
    0xf1, 0x80, 0x9a, 0x48, 0xa4, 0x97, 0x20, 0x0e,
    0x04, 0x6d, 0x39, 0xcc, 0xc7, 0x11, 0x2c, 0xd0
};

static const unsigned char addenum_1[SHA224_DIGEST_LENGTH] = {
    0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8, 0x22,
    0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2, 0x55, 0xb3,
    0x2a, 0xad, 0xbc, 0xe4, 0xbd, 0xa0, 0xb3, 0xf7,
    0xe3, 0x6c, 0x9d, 0xa7
};

static const unsigned char addenum_2[SHA224_DIGEST_LENGTH] = {
    0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76, 0xcc,
    0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89, 0x01, 0x50,
    0xb0, 0xc6, 0x45, 0x5c, 0xb4, 0xf5, 0x8b, 0x19,
    0x52, 0x52, 0x25, 0x25
};

static const unsigned char addenum_3[SHA224_DIGEST_LENGTH] = {
    0x20, 0x79, 0x46, 0x55, 0x98, 0x0c, 0x91, 0xd8,
    0xbb, 0xb4, 0xc1, 0xea, 0x97, 0x61, 0x8a, 0x4b,
    0xf0, 0x3f, 0x42, 0x58, 0x19, 0x48, 0xb2, 0xee,
    0x4e, 0xe7, 0xad, 0x67
};

int main(int argc, char **argv)
{
    unsigned char md[SHA256_DIGEST_LENGTH];
    int i;
    EVP_MD_CTX *evp;

    fprintf(stdout, "Testing SHA-256 ");

    if (!EVP_Digest("abc", 3, md, NULL, EVP_sha256(), NULL))
        goto err;
    if (memcmp(md, app_b1, sizeof(app_b1))) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 1 of 3 failed.\n");
        return 1;
    } else
        fprintf(stdout, ".");
    fflush(stdout);

    if (!EVP_Digest("abcdbcde" "cdefdefg" "efghfghi" "ghijhijk"
                    "ijkljklm" "klmnlmno" "mnopnopq", 56, md,
                     NULL, EVP_sha256(), NULL))
        goto err;
    if (memcmp(md, app_b2, sizeof(app_b2))) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 2 of 3 failed.\n");
        return 1;
    } else
        fprintf(stdout, ".");
    fflush(stdout);

    evp = EVP_MD_CTX_new();
    if (evp == NULL) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 3 of 3 failed. (malloc failure)\n");
        return 1;
    }
    if (!EVP_DigestInit_ex(evp, EVP_sha256(), NULL))
        goto err;
    for (i = 0; i < 1000000; i += 288) {
        if (!EVP_DigestUpdate(evp, "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa",
                              (1000000 - i) < 288 ? 1000000 - i : 288))
            goto err;
    }
    if (!EVP_DigestFinal_ex(evp, md, NULL))
            goto err;

    if (memcmp(md, app_b3, sizeof(app_b3))) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 3 of 3 failed.\n");
        return 1;
    } else
        fprintf(stdout, ".");
    fflush(stdout);

    fprintf(stdout, " passed.\n");
    fflush(stdout);

    fprintf(stdout, "Testing SHA-224 ");

    if (!EVP_Digest("abc", 3, md, NULL, EVP_sha224(), NULL))
        goto err;
    if (memcmp(md, addenum_1, sizeof(addenum_1))) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 1 of 3 failed.\n");
        return 1;
    } else
        fprintf(stdout, ".");
    fflush(stdout);

    if (!EVP_Digest("abcdbcde" "cdefdefg" "efghfghi" "ghijhijk"
                    "ijkljklm" "klmnlmno" "mnopnopq", 56, md,
                    NULL, EVP_sha224(), NULL))
        goto err;
    if (memcmp(md, addenum_2, sizeof(addenum_2))) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 2 of 3 failed.\n");
        return 1;
    } else
        fprintf(stdout, ".");
    fflush(stdout);

    EVP_MD_CTX_reset(evp);
    if (!EVP_DigestInit_ex(evp, EVP_sha224(), NULL))
        goto err;
    for (i = 0; i < 1000000; i += 64) {
        if (!EVP_DigestUpdate(evp, "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                              "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa",
                              (1000000 - i) < 64 ? 1000000 - i : 64))
            goto err;
    }
    if (!EVP_DigestFinal_ex(evp, md, NULL))
            goto err;
    EVP_MD_CTX_free(evp);

    if (memcmp(md, addenum_3, sizeof(addenum_3))) {
        fflush(stdout);
        fprintf(stderr, "\nTEST 3 of 3 failed.\n");
        return 1;
    } else
        fprintf(stdout, ".");
    fflush(stdout);

    fprintf(stdout, " passed.\n");
    fflush(stdout);

    return 0;

 err:
    fprintf(stderr, "Fatal EVP error!\n");
    return 1;
}