openssl/test/cmsapitest.c

/*
 * Copyright 2018-2023 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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 <string.h>

#include <openssl/cms.h>
#include <openssl/bio.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include "../crypto/cms/cms_local.h" /* for d.signedData and d.envelopedData */

#include "testutil.h"

static X509 *cert = NULL;
static EVP_PKEY *privkey = NULL;
static char *derin = NULL;

static int test_encrypt_decrypt(const EVP_CIPHER *cipher)
{
    int testresult = 0;
    STACK_OF(X509) *certstack = sk_X509_new_null();
    const char *msg = "Hello world";
    BIO *msgbio = BIO_new_mem_buf(msg, strlen(msg));
    BIO *outmsgbio = BIO_new(BIO_s_mem());
    CMS_ContentInfo* content = NULL;
    BIO *contentbio = NULL;
    char buf[80];

    if (!TEST_ptr(certstack) || !TEST_ptr(msgbio) || !TEST_ptr(outmsgbio))
        goto end;

    if (!TEST_int_gt(sk_X509_push(certstack, cert), 0))
        goto end;

    content = CMS_encrypt(certstack, msgbio, cipher, CMS_TEXT);
    if (!TEST_ptr(content))
        goto end;

    if (!TEST_true(CMS_decrypt(content, privkey, cert, NULL, outmsgbio,
                               CMS_TEXT)))
        goto end;

    if (!TEST_ptr(contentbio =
                  CMS_EnvelopedData_decrypt(content->d.envelopedData,
                                            NULL, privkey, cert, NULL,
                                            CMS_TEXT, NULL, NULL)))
        goto end;

    /* Check we got the message we first started with */
    if (!TEST_int_eq(BIO_gets(outmsgbio, buf, sizeof(buf)), strlen(msg))
            || !TEST_int_eq(strcmp(buf, msg), 0))
        goto end;

    testresult = 1;
 end:
    BIO_free(contentbio);
    sk_X509_free(certstack);
    BIO_free(msgbio);
    BIO_free(outmsgbio);
    CMS_ContentInfo_free(content);

    return testresult && TEST_int_eq(ERR_peek_error(), 0);
}

static int test_encrypt_decrypt_aes_cbc(void)
{
    return test_encrypt_decrypt(EVP_aes_128_cbc());
}

static int test_encrypt_decrypt_aes_128_gcm(void)
{
    return test_encrypt_decrypt(EVP_aes_128_gcm());
}

static int test_encrypt_decrypt_aes_192_gcm(void)
{
    return test_encrypt_decrypt(EVP_aes_192_gcm());
}

static int test_encrypt_decrypt_aes_256_gcm(void)
{
    return test_encrypt_decrypt(EVP_aes_256_gcm());
}

static int test_CMS_add1_cert(void)
{
    CMS_ContentInfo *cms = NULL;
    int ret = 0;

    ret = TEST_ptr(cms = CMS_ContentInfo_new())
        && TEST_ptr(CMS_add1_signer(cms, cert, privkey, NULL, 0))
        && TEST_true(CMS_add1_cert(cms, cert)); /* add cert again */

    CMS_ContentInfo_free(cms);
    return ret;
}

static int test_d2i_CMS_bio_NULL(void)
{
    BIO *bio, *content = NULL;
    CMS_ContentInfo *cms = NULL;
    unsigned int flags = CMS_NO_SIGNER_CERT_VERIFY;
    int ret = 0;

    /*
     * Test data generated using:
     * openssl cms -sign -md sha256 -signer ./test/certs/rootCA.pem -inkey \
     * ./test/certs/rootCA.key -nodetach -outform DER -in ./in.txt -out out.der \
     * -nosmimecap
     */
    static const unsigned char cms_data[] = {
        0x30, 0x82, 0x05, 0xc5, 0x06, 0x09, 0x2a, 0x86,
        0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x02, 0xa0,
        0x82, 0x05, 0xb6, 0x30, 0x82, 0x05, 0xb2, 0x02,
        0x01, 0x01, 0x31, 0x0d, 0x30, 0x0b, 0x06, 0x09,
        0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
        0x01, 0x30, 0x1c, 0x06, 0x09, 0x2a, 0x86, 0x48,
        0x86, 0xf7, 0x0d, 0x01, 0x07, 0x01, 0xa0, 0x0f,
        0x04, 0x0d, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20,
        0x57, 0x6f, 0x72, 0x6c, 0x64, 0x0d, 0x0a, 0xa0,
        0x82, 0x03, 0x83, 0x30, 0x82, 0x03, 0x7f, 0x30,
        0x82, 0x02, 0x67, 0xa0, 0x03, 0x02, 0x01, 0x02,
        0x02, 0x09, 0x00, 0x88, 0x43, 0x29, 0xcb, 0xc2,
        0xeb, 0x15, 0x9a, 0x30, 0x0d, 0x06, 0x09, 0x2a,
        0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b,
        0x05, 0x00, 0x30, 0x56, 0x31, 0x0b, 0x30, 0x09,
        0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x41,
        0x55, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55,
        0x04, 0x08, 0x0c, 0x0a, 0x53, 0x6f, 0x6d, 0x65,
        0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x21,
        0x30, 0x1f, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c,
        0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65,
        0x74, 0x20, 0x57, 0x69, 0x64, 0x67, 0x69, 0x74,
        0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c, 0x74,
        0x64, 0x31, 0x0f, 0x30, 0x0d, 0x06, 0x03, 0x55,
        0x04, 0x03, 0x0c, 0x06, 0x72, 0x6f, 0x6f, 0x74,
        0x43, 0x41, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x35,
        0x30, 0x37, 0x30, 0x32, 0x31, 0x33, 0x31, 0x35,
        0x31, 0x31, 0x5a, 0x17, 0x0d, 0x33, 0x35, 0x30,
        0x37, 0x30, 0x32, 0x31, 0x33, 0x31, 0x35, 0x31,
        0x31, 0x5a, 0x30, 0x56, 0x31, 0x0b, 0x30, 0x09,
        0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x41,
        0x55, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55,
        0x04, 0x08, 0x0c, 0x0a, 0x53, 0x6f, 0x6d, 0x65,
        0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x21,
        0x30, 0x1f, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c,
        0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65,
        0x74, 0x20, 0x57, 0x69, 0x64, 0x67, 0x69, 0x74,
        0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c, 0x74,
        0x64, 0x31, 0x0f, 0x30, 0x0d, 0x06, 0x03, 0x55,
        0x04, 0x03, 0x0c, 0x06, 0x72, 0x6f, 0x6f, 0x74,
        0x43, 0x41, 0x30, 0x82, 0x01, 0x22, 0x30, 0x0d,
        0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
        0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01,
        0x0f, 0x00, 0x30, 0x82, 0x01, 0x0a, 0x02, 0x82,
        0x01, 0x01, 0x00, 0xc0, 0xf1, 0x6b, 0x77, 0x88,
        0xac, 0x35, 0xdf, 0xfb, 0x73, 0x53, 0x2f, 0x92,
        0x80, 0x2f, 0x74, 0x16, 0x32, 0x4d, 0xf5, 0x10,
        0x20, 0x6f, 0x6c, 0x3a, 0x8e, 0xd1, 0xdc, 0x6b,
        0xe1, 0x2e, 0x3e, 0xc3, 0x04, 0x0f, 0xbf, 0x9b,
        0xc4, 0xc9, 0x12, 0xd1, 0xe4, 0x0b, 0x45, 0x97,
        0xe5, 0x06, 0xcd, 0x66, 0x3a, 0xe1, 0xe0, 0xe2,
        0x2b, 0xdf, 0xa2, 0xc4, 0xec, 0x7b, 0xd3, 0x3d,
        0x3c, 0x8a, 0xff, 0x5e, 0x74, 0xa0, 0xab, 0xa7,
        0x03, 0x6a, 0x16, 0x5b, 0x5e, 0x92, 0xc4, 0x7e,
        0x5b, 0x79, 0x8a, 0x69, 0xd4, 0xbc, 0x83, 0x5e,
        0xae, 0x42, 0x92, 0x74, 0xa5, 0x2b, 0xe7, 0x00,
        0xc1, 0xa9, 0xdc, 0xd5, 0xb1, 0x53, 0x07, 0x0f,
        0x73, 0xf7, 0x8e, 0xad, 0x14, 0x3e, 0x25, 0x9e,
        0xe5, 0x1e, 0xe6, 0xcc, 0x91, 0xcd, 0x95, 0x0c,
        0x80, 0x44, 0x20, 0xc3, 0xfd, 0x17, 0xcf, 0x91,
        0x3d, 0x63, 0x10, 0x1c, 0x14, 0x5b, 0xfb, 0xc3,
        0xa8, 0xc1, 0x88, 0xb2, 0x77, 0xff, 0x9c, 0xdb,
        0xfc, 0x6a, 0x44, 0x44, 0x44, 0xf7, 0x85, 0xec,
        0x08, 0x2c, 0xd4, 0xdf, 0x81, 0xa3, 0x79, 0xc9,
        0xfe, 0x1e, 0x9b, 0x93, 0x16, 0x53, 0xb7, 0x97,
        0xab, 0xbe, 0x4f, 0x1a, 0xa5, 0xe2, 0xfa, 0x46,
        0x05, 0xe4, 0x0d, 0x9c, 0x2a, 0xa4, 0xcc, 0xb9,
        0x1e, 0x21, 0xa0, 0x6c, 0xc4, 0xab, 0x59, 0xb0,
        0x40, 0x39, 0xbb, 0xf9, 0x88, 0xad, 0xfd, 0xdf,
        0x8d, 0xb4, 0x0b, 0xaf, 0x7e, 0x41, 0xe0, 0x21,
        0x3c, 0xc8, 0x33, 0x45, 0x49, 0x84, 0x2f, 0x93,
        0x06, 0xee, 0xfd, 0x4f, 0xed, 0x4f, 0xf3, 0xbc,
        0x9b, 0xde, 0xfc, 0x25, 0x5e, 0x55, 0xd5, 0x75,
        0xd4, 0xc5, 0x7b, 0x3a, 0x40, 0x35, 0x06, 0x9f,
        0xc4, 0x84, 0xb4, 0x6c, 0x93, 0x0c, 0xaf, 0x37,
        0x5a, 0xaf, 0xb6, 0x41, 0x4d, 0x26, 0x23, 0x1c,
        0xb8, 0x02, 0xb3, 0x02, 0x03, 0x01, 0x00, 0x01,
        0xa3, 0x50, 0x30, 0x4e, 0x30, 0x0c, 0x06, 0x03,
        0x55, 0x1d, 0x13, 0x04, 0x05, 0x30, 0x03, 0x01,
        0x01, 0xff, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d,
        0x0e, 0x04, 0x16, 0x04, 0x14, 0x85, 0x56, 0x89,
        0x35, 0xe2, 0x9f, 0x00, 0x1a, 0xe1, 0x86, 0x03,
        0x0b, 0x4b, 0xaf, 0x76, 0x12, 0x6b, 0x33, 0x6d,
        0xfd, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23,
        0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0x85, 0x56,
        0x89, 0x35, 0xe2, 0x9f, 0x00, 0x1a, 0xe1, 0x86,
        0x03, 0x0b, 0x4b, 0xaf, 0x76, 0x12, 0x6b, 0x33,
        0x6d, 0xfd, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86,
        0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05,
        0x00, 0x03, 0x82, 0x01, 0x01, 0x00, 0x32, 0x0a,
        0xbf, 0x2a, 0x0a, 0xe2, 0xbb, 0x4f, 0x43, 0xce,
        0x88, 0xda, 0x5a, 0x39, 0x10, 0x37, 0x80, 0xbb,
        0x37, 0x2d, 0x5e, 0x2d, 0x88, 0xdd, 0x26, 0x69,
        0x9c, 0xe7, 0xb4, 0x98, 0x20, 0xb1, 0x25, 0xe6,
        0x61, 0x59, 0x6d, 0x12, 0xec, 0x9b, 0x87, 0xbe,
        0x57, 0xe1, 0x12, 0x05, 0xc5, 0x04, 0xf1, 0x17,
        0xce, 0x14, 0xb8, 0x1c, 0x92, 0xd4, 0x95, 0x95,
        0x2c, 0x5b, 0x28, 0x89, 0xfb, 0x72, 0x9c, 0x20,
        0xd3, 0x32, 0x81, 0xa8, 0x85, 0xec, 0xc8, 0x08,
        0x7b, 0xa8, 0x59, 0x5b, 0x3a, 0x6c, 0x31, 0xab,
        0x52, 0xe2, 0x66, 0xcd, 0x14, 0x49, 0x5c, 0xf3,
        0xd3, 0x3e, 0x62, 0xbc, 0x91, 0x16, 0xb4, 0x1c,
        0xf5, 0xdd, 0x54, 0xaa, 0x3c, 0x61, 0x97, 0x79,
        0xac, 0xe4, 0xc8, 0x43, 0x35, 0xc3, 0x0f, 0xfc,
        0xf3, 0x70, 0x1d, 0xaf, 0xf0, 0x9c, 0x8a, 0x2a,
        0x92, 0x93, 0x48, 0xaa, 0xd0, 0xe8, 0x47, 0xbe,
        0x35, 0xc1, 0xc6, 0x7b, 0x6d, 0xda, 0xfa, 0x5d,
        0x57, 0x45, 0xf3, 0xea, 0x41, 0x8f, 0x36, 0xc1,
        0x3c, 0xf4, 0x52, 0x7f, 0x6e, 0x31, 0xdd, 0xba,
        0x9a, 0xbc, 0x70, 0x56, 0x71, 0x38, 0xdc, 0x49,
        0x57, 0x0c, 0xfd, 0x91, 0x17, 0xc5, 0xea, 0x87,
        0xe5, 0x23, 0x74, 0x19, 0xb2, 0xb6, 0x99, 0x0c,
        0x6b, 0xa2, 0x05, 0xf8, 0x51, 0x68, 0xed, 0x97,
        0xe0, 0xdf, 0x62, 0xf9, 0x7e, 0x7a, 0x3a, 0x44,
        0x71, 0x83, 0x57, 0x28, 0x49, 0x88, 0x69, 0xb5,
        0x14, 0x1e, 0xda, 0x46, 0xe3, 0x6e, 0x78, 0xe1,
        0xcb, 0x8f, 0xb5, 0x98, 0xb3, 0x2d, 0x6e, 0x5b,
        0xb7, 0xf6, 0x93, 0x24, 0x14, 0x1f, 0xa4, 0xf6,
        0x69, 0xbd, 0xff, 0x4c, 0x52, 0x50, 0x02, 0xc5,
        0x43, 0x8d, 0x14, 0xe2, 0xd0, 0x75, 0x9f, 0x12,
        0x5e, 0x94, 0x89, 0xd1, 0xef, 0x77, 0x89, 0x7d,
        0x89, 0xd9, 0x9e, 0x76, 0x99, 0x24, 0x31, 0x82,
        0x01, 0xf7, 0x30, 0x82, 0x01, 0xf3, 0x02, 0x01,
        0x01, 0x30, 0x63, 0x30, 0x56, 0x31, 0x0b, 0x30,
        0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02,
        0x41, 0x55, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03,
        0x55, 0x04, 0x08, 0x0c, 0x0a, 0x53, 0x6f, 0x6d,
        0x65, 0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31,
        0x21, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x04, 0x0a,
        0x0c, 0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e,
        0x65, 0x74, 0x20, 0x57, 0x69, 0x64, 0x67, 0x69,
        0x74, 0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c,
        0x74, 0x64, 0x31, 0x0f, 0x30, 0x0d, 0x06, 0x03,
        0x55, 0x04, 0x03, 0x0c, 0x06, 0x72, 0x6f, 0x6f,
        0x74, 0x43, 0x41, 0x02, 0x09, 0x00, 0x88, 0x43,
        0x29, 0xcb, 0xc2, 0xeb, 0x15, 0x9a, 0x30, 0x0b,
        0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
        0x04, 0x02, 0x01, 0xa0, 0x69, 0x30, 0x18, 0x06,
        0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
        0x09, 0x03, 0x31, 0x0b, 0x06, 0x09, 0x2a, 0x86,
        0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x01, 0x30,
        0x1c, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7,
        0x0d, 0x01, 0x09, 0x05, 0x31, 0x0f, 0x17, 0x0d,
        0x32, 0x30, 0x31, 0x32, 0x31, 0x31, 0x30, 0x39,
        0x30, 0x30, 0x31, 0x33, 0x5a, 0x30, 0x2f, 0x06,
        0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
        0x09, 0x04, 0x31, 0x22, 0x04, 0x20, 0xb0, 0x80,
        0x22, 0xd3, 0x15, 0xcf, 0x1e, 0xb1, 0x2d, 0x26,
        0x65, 0xbd, 0xed, 0x0e, 0x6a, 0xf4, 0x06, 0x53,
        0xc0, 0xa0, 0xbe, 0x97, 0x52, 0x32, 0xfb, 0x49,
        0xbc, 0xbd, 0x02, 0x1c, 0xfc, 0x36, 0x30, 0x0d,
        0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
        0x01, 0x01, 0x01, 0x05, 0x00, 0x04, 0x82, 0x01,
        0x00, 0x37, 0x44, 0x39, 0x08, 0xb2, 0x19, 0x52,
        0x35, 0x9c, 0xd0, 0x67, 0x87, 0xae, 0xb8, 0x1c,
        0x80, 0xf4, 0x03, 0x29, 0x2e, 0xe3, 0x76, 0x4a,
        0xb0, 0x98, 0x10, 0x00, 0x9a, 0x30, 0xdb, 0x05,
        0x28, 0x53, 0x34, 0x31, 0x14, 0xbd, 0x87, 0xb9,
        0x4d, 0x45, 0x07, 0x97, 0xa3, 0x57, 0x0b, 0x7e,
        0xd1, 0x67, 0xfb, 0x4e, 0x0f, 0x5b, 0x90, 0xb2,
        0x6f, 0xe6, 0xce, 0x49, 0xdd, 0x72, 0x46, 0x71,
        0x26, 0xa1, 0x1b, 0x98, 0x23, 0x7d, 0x69, 0x73,
        0x84, 0xdc, 0xf9, 0xd2, 0x1c, 0x6d, 0xf6, 0xf5,
        0x17, 0x49, 0x6e, 0x9d, 0x4d, 0xf1, 0xe2, 0x43,
        0x29, 0x53, 0x55, 0xa5, 0x22, 0x1e, 0x89, 0x2c,
        0xaf, 0xf2, 0x43, 0x47, 0xd5, 0xfa, 0xad, 0xe7,
        0x89, 0x60, 0xbf, 0x96, 0x35, 0x6f, 0xc2, 0x99,
        0xb7, 0x55, 0xc5, 0xe3, 0x04, 0x25, 0x1b, 0xf6,
        0x7e, 0xf2, 0x2b, 0x14, 0xa9, 0x57, 0x96, 0xbe,
        0xbd, 0x6e, 0x95, 0x44, 0x94, 0xbd, 0xaf, 0x9a,
        0x6d, 0x77, 0x55, 0x5e, 0x6c, 0xf6, 0x32, 0x37,
        0xec, 0xef, 0xe5, 0x81, 0xb0, 0xe3, 0x35, 0xc7,
        0x86, 0xea, 0x47, 0x59, 0x38, 0xb6, 0x16, 0xfb,
        0x1d, 0x10, 0x55, 0x48, 0xb1, 0x44, 0x33, 0xde,
        0xf6, 0x29, 0xbe, 0xbf, 0xbc, 0x71, 0x3e, 0x49,
        0xba, 0xe7, 0x9f, 0x4d, 0x6c, 0xfb, 0xec, 0xd2,
        0xe0, 0x12, 0xa9, 0x7c, 0xc9, 0x9a, 0x7b, 0x85,
        0x83, 0xb8, 0xca, 0xdd, 0xf6, 0xb7, 0x15, 0x75,
        0x7b, 0x4a, 0x69, 0xcf, 0x0a, 0xc7, 0x80, 0x01,
        0xe7, 0x94, 0x16, 0x7f, 0x8d, 0x3c, 0xfa, 0x1f,
        0x05, 0x71, 0x76, 0x15, 0xb0, 0xf6, 0x61, 0x30,
        0x58, 0x16, 0xbe, 0x1b, 0xd1, 0x93, 0xc4, 0x1a,
        0x91, 0x0c, 0x48, 0xe2, 0x1c, 0x8e, 0xa5, 0xc5,
        0xa7, 0x81, 0x44, 0x48, 0x3b, 0x10, 0xc2, 0x74,
        0x07, 0xdf, 0xa8, 0xae, 0x57, 0xee, 0x7f, 0xe3,
        0x6a
    };

    ret = TEST_ptr(bio = BIO_new_mem_buf(cms_data, sizeof(cms_data)))
        && TEST_ptr(cms = d2i_CMS_bio(bio, NULL))
        && TEST_true(CMS_verify(cms, NULL, NULL, NULL, NULL, flags))
        && TEST_ptr(content =
                    CMS_SignedData_verify(cms->d.signedData, NULL, NULL, NULL,
                                          NULL, NULL, flags, NULL, NULL));
    BIO_free(content);
    CMS_ContentInfo_free(cms);
    BIO_free(bio);
    return ret && TEST_int_eq(ERR_peek_error(), 0);
}

static unsigned char *read_all(BIO *bio, long *p_len)
{
    const int step = 256;
    unsigned char *buf = NULL;
    unsigned char *tmp = NULL;
    int ret;

    *p_len = 0;
    for (;;) {
        tmp = OPENSSL_realloc(buf, *p_len + step);
        if (tmp == NULL)
            break;
        buf = tmp;
        ret = BIO_read(bio, buf + *p_len, step);
        if (ret < 0)
            break;

        *p_len += ret;

        if (ret < step)
            return buf;
    }

    /* Error */
    OPENSSL_free(buf);
    *p_len = 0;
    return NULL;
}

static int test_d2i_CMS_decode(const int idx)
{
    BIO *bio = NULL;
    CMS_ContentInfo *cms = NULL;
    unsigned char *buf = NULL;
    const unsigned char *tmp = NULL;
    long buf_len = 0;
    int ret = 0;

    if (!TEST_ptr(bio = BIO_new_file(derin, "r")))
      goto end;

    switch (idx) {
    case 0:
        if (!TEST_ptr(cms = d2i_CMS_bio(bio, NULL)))
            goto end;
        break;
    case 1:
        if (!TEST_ptr(buf = read_all(bio, &buf_len)))
            goto end;
        tmp = buf;
        if (!TEST_ptr(cms = d2i_CMS_ContentInfo(NULL, &tmp, buf_len)))
            goto end;
        break;
    }

    if (!TEST_int_eq(ERR_peek_error(), 0))
        goto end;

    ret = 1;
end:
    CMS_ContentInfo_free(cms);
    BIO_free(bio);
    OPENSSL_free(buf);

    return ret;
}

OPT_TEST_DECLARE_USAGE("certfile privkeyfile derfile\n")

int setup_tests(void)
{
    char *certin = NULL, *privkeyin = NULL;
    BIO *certbio = NULL, *privkeybio = NULL;

    if (!test_skip_common_options()) {
        TEST_error("Error parsing test options\n");
        return 0;
    }

    if (!TEST_ptr(certin = test_get_argument(0))
            || !TEST_ptr(privkeyin = test_get_argument(1))
            || !TEST_ptr(derin = test_get_argument(2)))
        return 0;

    certbio = BIO_new_file(certin, "r");
    if (!TEST_ptr(certbio))
        return 0;
    if (!TEST_true(PEM_read_bio_X509(certbio, &cert, NULL, NULL))) {
        BIO_free(certbio);
        return 0;
    }
    BIO_free(certbio);

    privkeybio = BIO_new_file(privkeyin, "r");
    if (!TEST_ptr(privkeybio)) {
        X509_free(cert);
        cert = NULL;
        return 0;
    }
    if (!TEST_true(PEM_read_bio_PrivateKey(privkeybio, &privkey, NULL, NULL))) {
        BIO_free(privkeybio);
        X509_free(cert);
        cert = NULL;
        return 0;
    }
    BIO_free(privkeybio);

    ADD_TEST(test_encrypt_decrypt_aes_cbc);
    ADD_TEST(test_encrypt_decrypt_aes_128_gcm);
    ADD_TEST(test_encrypt_decrypt_aes_192_gcm);
    ADD_TEST(test_encrypt_decrypt_aes_256_gcm);
    ADD_TEST(test_CMS_add1_cert);
    ADD_TEST(test_d2i_CMS_bio_NULL);
    ADD_ALL_TESTS(test_d2i_CMS_decode, 2);
    return 1;
}

void cleanup_tests(void)
{
    X509_free(cert);
    EVP_PKEY_free(privkey);
}