/* BEGIN_HEADER */
#include "mbedtls/bignum.h"
#include "mbedtls/pkcs7.h"
#include "mbedtls/x509.h"
#include "mbedtls/x509_crt.h"
#include "mbedtls/x509_crl.h"
#include "mbedtls/oid.h"
#include "sys/types.h"
#include "sys/stat.h"
/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PKCS7_C:MBEDTLS_RSA_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO */
void pkcs7_parse( char *pkcs7_file, int res_expect )
{
    unsigned char *pkcs7_buf = NULL;
    size_t buflen;
    int res;

    mbedtls_pkcs7 pkcs7;

    mbedtls_pkcs7_init( &pkcs7 );

    res = mbedtls_pk_load_file( pkcs7_file, &pkcs7_buf, &buflen );
    TEST_ASSERT( res == 0 );

    res = mbedtls_pkcs7_parse_der( &pkcs7, pkcs7_buf, buflen );
    TEST_ASSERT( res == res_expect );

exit:
    mbedtls_free( pkcs7_buf );
    mbedtls_pkcs7_free( &pkcs7 );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_PKCS1_V15:MBEDTLS_RSA_C */
void pkcs7_verify( char *pkcs7_file, char *crt, char *filetobesigned, int do_hash_alg, int res_expect )
{
    unsigned char *pkcs7_buf = NULL;
    size_t buflen;
    unsigned char *data = NULL;
    unsigned char hash[32];
    struct stat st;
    size_t datalen;
    int res;
    FILE *file;
    const mbedtls_md_info_t *md_info;
    mbedtls_md_type_t md_alg;

    mbedtls_pkcs7 pkcs7;
    mbedtls_x509_crt x509;

    USE_PSA_INIT();

    mbedtls_pkcs7_init( &pkcs7 );
    mbedtls_x509_crt_init( &x509 );

    res = mbedtls_x509_crt_parse_file( &x509, crt );
    TEST_ASSERT( res == 0 );

    res = mbedtls_pk_load_file( pkcs7_file, &pkcs7_buf, &buflen );
    TEST_ASSERT( res == 0 );

    res = mbedtls_pkcs7_parse_der( &pkcs7, pkcs7_buf, buflen );
    TEST_ASSERT( res == MBEDTLS_PKCS7_SIGNED_DATA );

    res = stat( filetobesigned, &st );
    TEST_ASSERT( res == 0 );

    file = fopen( filetobesigned, "rb" );
    TEST_ASSERT( file != NULL );

    datalen = st.st_size;
    ASSERT_ALLOC( data, datalen );
    TEST_ASSERT( data != NULL );

    buflen = fread( (void *)data , sizeof( unsigned char ), datalen, file );
    TEST_ASSERT( buflen == datalen );
    fclose( file );

    if( do_hash_alg )
    {
        res = mbedtls_oid_get_md_alg( &pkcs7.signed_data.digest_alg_identifiers, &md_alg );
        TEST_ASSERT( res == 0 );
        TEST_ASSERT( md_alg == (mbedtls_md_type_t) do_hash_alg );
        md_info = mbedtls_md_info_from_type( md_alg );

        res = mbedtls_md( md_info, data, datalen, hash );
        TEST_ASSERT( res == 0 );

        res = mbedtls_pkcs7_signed_hash_verify( &pkcs7, &x509, hash, sizeof(hash) );
    }
    else
    {
        res = mbedtls_pkcs7_signed_data_verify( &pkcs7, &x509, data, datalen );
    }
    TEST_ASSERT( res == res_expect );

exit:
    mbedtls_x509_crt_free( &x509 );
    mbedtls_free( data );
    mbedtls_pkcs7_free( &pkcs7 );
    mbedtls_free( pkcs7_buf );
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_PKCS1_V15:MBEDTLS_RSA_C */
void pkcs7_verify_multiple_signers( char *pkcs7_file, char *crt1, char *crt2, char *filetobesigned, int do_hash_alg, int res_expect )
{
    unsigned char *pkcs7_buf = NULL;
    size_t buflen;
    unsigned char *data = NULL;
    unsigned char hash[32];
    struct stat st;
    size_t datalen;
    int res;
    FILE *file;
    const mbedtls_md_info_t *md_info;
    mbedtls_md_type_t md_alg;

    mbedtls_pkcs7 pkcs7;
    mbedtls_x509_crt x509_1;
    mbedtls_x509_crt x509_2;

    USE_PSA_INIT();

    mbedtls_pkcs7_init( &pkcs7 );
    mbedtls_x509_crt_init( &x509_1 );
    mbedtls_x509_crt_init( &x509_2 );

    res = mbedtls_pk_load_file( pkcs7_file, &pkcs7_buf, &buflen );
    TEST_ASSERT( res == 0 );

    res = mbedtls_pkcs7_parse_der( &pkcs7, pkcs7_buf, buflen );
    TEST_ASSERT( res == MBEDTLS_PKCS7_SIGNED_DATA );

    TEST_ASSERT( pkcs7.signed_data.no_of_signers == 2 );

    res = mbedtls_x509_crt_parse_file( &x509_1, crt1 );
    TEST_ASSERT( res == 0 );

    res = mbedtls_x509_crt_parse_file( &x509_2, crt2 );
    TEST_ASSERT( res == 0 );

    res = stat( filetobesigned, &st );
    TEST_ASSERT( res == 0 );

    file = fopen( filetobesigned, "rb" );
    TEST_ASSERT( file != NULL );

    datalen = st.st_size;
    ASSERT_ALLOC( data, datalen );
    buflen = fread( ( void * )data , sizeof( unsigned char ), datalen, file );
    TEST_ASSERT( buflen == datalen );

    fclose( file );

    if( do_hash_alg )
    {
        res = mbedtls_oid_get_md_alg( &pkcs7.signed_data.digest_alg_identifiers, &md_alg );
        TEST_ASSERT( res == 0 );
        TEST_ASSERT( md_alg == MBEDTLS_MD_SHA256 );

        md_info = mbedtls_md_info_from_type( md_alg );

        res = mbedtls_md( md_info, data, datalen, hash );
        TEST_ASSERT( res == 0 );

        res = mbedtls_pkcs7_signed_hash_verify( &pkcs7, &x509_1, hash, sizeof(hash) );
        TEST_ASSERT( res == res_expect );
    }
    else
    {
        res = mbedtls_pkcs7_signed_data_verify( &pkcs7, &x509_1, data, datalen );
        TEST_ASSERT( res == res_expect );
    }

    res = mbedtls_pkcs7_signed_data_verify( &pkcs7, &x509_2, data, datalen );
    TEST_ASSERT( res == res_expect );

exit:
    mbedtls_x509_crt_free( &x509_1 );
    mbedtls_x509_crt_free( &x509_2 );
    mbedtls_pkcs7_free( &pkcs7 );
    mbedtls_free( data );
    mbedtls_free( pkcs7_buf );
    USE_PSA_DONE();
}
/* END_CASE */