682 lines
20 KiB
Text
682 lines
20 KiB
Text
/* BEGIN_HEADER */
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#include <errno.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "mbedtls/bignum.h"
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#include "mbedtls/asn1.h"
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#if defined(MBEDTLS_ASN1_WRITE_C)
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#include "mbedtls/asn1write.h"
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#endif
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#define ERR_PARSE_INCONSISTENCY INT_MAX
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static int nested_parse( unsigned char **const p,
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const unsigned char *const end )
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{
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int ret;
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size_t len = 0;
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size_t len2 = 0;
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unsigned char *const start = *p;
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unsigned char *content_start;
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unsigned char tag;
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/* First get the length, skipping over the tag. */
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content_start = start + 1;
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ret = mbedtls_asn1_get_len( &content_start, end, &len );
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TEST_ASSERT( content_start <= end );
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if( ret != 0 )
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return( ret );
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/* Since we have a valid element start (tag and length), retrieve and
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* check the tag. */
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tag = start[0];
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TEST_EQUAL( mbedtls_asn1_get_tag( p, end, &len2, tag ^ 1 ),
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MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
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*p = start;
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TEST_EQUAL( mbedtls_asn1_get_tag( p, end, &len2, tag ), 0 );
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TEST_EQUAL( len, len2 );
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TEST_ASSERT( *p == content_start );
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*p = content_start;
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switch( tag & 0x1f )
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{
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case MBEDTLS_ASN1_BOOLEAN:
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{
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int val = -257;
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*p = start;
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ret = mbedtls_asn1_get_bool( p, end, &val );
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if( ret == 0 )
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TEST_ASSERT( val == 0 || val == 1 );
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break;
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}
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case MBEDTLS_ASN1_INTEGER:
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{
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi mpi;
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mbedtls_mpi_init( &mpi );
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*p = start;
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ret = mbedtls_asn1_get_mpi( p, end, &mpi );
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mbedtls_mpi_free( &mpi );
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#else
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*p = start + 1;
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ret = mbedtls_asn1_get_len( p, end, &len );
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*p += len;
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#endif
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/* If we're sure that the number fits in an int, also
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* call mbedtls_asn1_get_int(). */
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if( ret == 0 && len < sizeof( int ) )
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{
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int val = -257;
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unsigned char *q = start;
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ret = mbedtls_asn1_get_int( &q, end, &val );
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TEST_ASSERT( *p == q );
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}
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break;
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}
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case MBEDTLS_ASN1_BIT_STRING:
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{
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mbedtls_asn1_bitstring bs;
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*p = start;
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ret = mbedtls_asn1_get_bitstring( p, end, &bs );
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break;
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}
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case MBEDTLS_ASN1_SEQUENCE:
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{
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while( *p <= end && *p < content_start + len && ret == 0 )
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ret = nested_parse( p, content_start + len );
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break;
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}
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case MBEDTLS_ASN1_OCTET_STRING:
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case MBEDTLS_ASN1_NULL:
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case MBEDTLS_ASN1_OID:
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case MBEDTLS_ASN1_UTF8_STRING:
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case MBEDTLS_ASN1_SET:
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case MBEDTLS_ASN1_PRINTABLE_STRING:
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case MBEDTLS_ASN1_T61_STRING:
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case MBEDTLS_ASN1_IA5_STRING:
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case MBEDTLS_ASN1_UTC_TIME:
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case MBEDTLS_ASN1_GENERALIZED_TIME:
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case MBEDTLS_ASN1_UNIVERSAL_STRING:
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case MBEDTLS_ASN1_BMP_STRING:
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default:
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/* No further testing implemented for this tag. */
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*p += len;
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return( 0 );
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}
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TEST_ASSERT( *p <= end );
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return( ret );
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exit:
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return( ERR_PARSE_INCONSISTENCY );
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}
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int get_len_step( const data_t *input, size_t buffer_size,
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size_t actual_length )
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{
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unsigned char *buf = NULL;
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unsigned char *p = NULL;
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unsigned char *end;
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size_t parsed_length;
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int ret;
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test_set_step( buffer_size );
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/* Allocate a new buffer of exactly the length to parse each time.
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* This gives memory sanitizers a chance to catch buffer overreads. */
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if( buffer_size == 0 )
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{
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ASSERT_ALLOC( buf, 1 );
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end = buf + 1;
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p = end;
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}
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else
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{
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ASSERT_ALLOC_WEAK( buf, buffer_size );
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if( buffer_size > input->len )
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{
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memcpy( buf, input->x, input->len );
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memset( buf + input->len, 'A', buffer_size - input->len );
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}
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else
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{
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memcpy( buf, input->x, buffer_size );
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}
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p = buf;
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end = buf + buffer_size;
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}
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ret = mbedtls_asn1_get_len( &p, end, &parsed_length );
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if( buffer_size >= input->len + actual_length )
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{
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TEST_EQUAL( ret, 0 );
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TEST_ASSERT( p == buf + input->len );
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TEST_EQUAL( parsed_length, actual_length );
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}
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else
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{
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TEST_EQUAL( ret, MBEDTLS_ERR_ASN1_OUT_OF_DATA );
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}
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mbedtls_free( buf );
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return( 1 );
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exit:
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mbedtls_free( buf );
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return( 0 );
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}
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_ASN1_PARSE_C
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE */
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void parse_prefixes( const data_t *input,
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int actual_length_arg,
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int last_result )
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{
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size_t actual_length = actual_length_arg;
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unsigned char *buf = NULL;
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unsigned char *p = NULL;
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size_t buffer_size;
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int ret;
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for( buffer_size = 1; buffer_size <= input->len; buffer_size++ )
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{
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test_set_step( buffer_size );
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/* Allocate a new buffer of exactly the length to parse each time.
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* This gives memory sanitizers a chance to catch buffer overreads. */
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ASSERT_ALLOC( buf, buffer_size );
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memcpy( buf, input->x, buffer_size );
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p = buf;
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ret = nested_parse( &p, buf + buffer_size );
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if( ret == ERR_PARSE_INCONSISTENCY )
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goto exit;
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if( actual_length > 0 && buffer_size >= actual_length )
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{
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TEST_EQUAL( ret, last_result );
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if( ret == 0 )
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TEST_ASSERT( p == buf + actual_length );
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}
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else
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{
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TEST_EQUAL( ret, MBEDTLS_ERR_ASN1_OUT_OF_DATA );
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}
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mbedtls_free( buf );
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buf = NULL;
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}
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exit:
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mbedtls_free( buf );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void get_len( const data_t *input, int actual_length_arg )
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{
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size_t actual_length = actual_length_arg;
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size_t buffer_size;
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for( buffer_size = 1; buffer_size <= input->len + 1; buffer_size++ )
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{
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if( ! get_len_step( input, buffer_size, actual_length ) )
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goto exit;
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}
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if( ! get_len_step( input, input->len + actual_length - 1, actual_length ) )
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goto exit;
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if( ! get_len_step( input, input->len + actual_length, actual_length ) )
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goto exit;
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void get_boolean( const data_t *input,
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int expected_value, int expected_result )
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{
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unsigned char *p = input->x;
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int val;
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int ret;
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ret = mbedtls_asn1_get_bool( &p, input->x + input->len, &val );
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TEST_EQUAL( ret, expected_result );
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if( expected_result == 0 )
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{
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TEST_EQUAL( val, expected_value );
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TEST_ASSERT( p == input->x + input->len );
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}
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void empty_integer( const data_t *input )
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{
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unsigned char *p;
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi actual_mpi;
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#endif
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int val;
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi_init( & actual_mpi );
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#endif
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/* An INTEGER with no content is not valid. */
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p = input->x;
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TEST_EQUAL( mbedtls_asn1_get_int( &p, input->x + input->len, &val ),
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MBEDTLS_ERR_ASN1_INVALID_LENGTH );
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#if defined(MBEDTLS_BIGNUM_C)
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/* INTEGERs are sometimes abused as bitstrings, so the library accepts
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* an INTEGER with empty content and gives it the value 0. */
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p = input->x;
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TEST_EQUAL( mbedtls_asn1_get_mpi( &p, input->x + input->len, &actual_mpi ),
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0 );
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TEST_EQUAL( mbedtls_mpi_cmp_int( &actual_mpi, 0 ), 0 );
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#endif
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exit:
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi_free( &actual_mpi );
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#endif
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/*empty cleanup in some configurations*/ ;
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void get_integer( const data_t *input,
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const char *expected_hex, int expected_result )
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{
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unsigned char *p;
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi expected_mpi;
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mbedtls_mpi actual_mpi;
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mbedtls_mpi complement;
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int expected_result_for_mpi = expected_result;
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#endif
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long expected_value;
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int expected_result_for_int = expected_result;
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int val;
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int ret;
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi_init( &expected_mpi );
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mbedtls_mpi_init( &actual_mpi );
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mbedtls_mpi_init( &complement );
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#endif
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errno = 0;
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expected_value = strtol( expected_hex, NULL, 16 );
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if( expected_result == 0 &&
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( errno == ERANGE
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#if LONG_MAX > INT_MAX
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|| expected_value > INT_MAX || expected_value < INT_MIN
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#endif
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) )
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{
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/* The library returns the dubious error code INVALID_LENGTH
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* for integers that are out of range. */
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expected_result_for_int = MBEDTLS_ERR_ASN1_INVALID_LENGTH;
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}
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if( expected_result == 0 && expected_value < 0 )
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{
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/* The library does not support negative INTEGERs and
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* returns the dubious error code INVALID_LENGTH.
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* Test that we preserve the historical behavior. If we
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* decide to change the behavior, we'll also change this test. */
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expected_result_for_int = MBEDTLS_ERR_ASN1_INVALID_LENGTH;
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}
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p = input->x;
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ret = mbedtls_asn1_get_int( &p, input->x + input->len, &val );
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TEST_EQUAL( ret, expected_result_for_int );
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if( ret == 0 )
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{
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TEST_EQUAL( val, expected_value );
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TEST_ASSERT( p == input->x + input->len );
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}
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#if defined(MBEDTLS_BIGNUM_C)
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ret = mbedtls_mpi_read_string( &expected_mpi, 16, expected_hex );
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TEST_ASSERT( ret == 0 || ret == MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
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if( ret == MBEDTLS_ERR_MPI_BAD_INPUT_DATA )
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{
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/* The data overflows the maximum MPI size. */
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expected_result_for_mpi = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
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}
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p = input->x;
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ret = mbedtls_asn1_get_mpi( &p, input->x + input->len, &actual_mpi );
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TEST_EQUAL( ret, expected_result_for_mpi );
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if( ret == 0 )
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{
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if( expected_value >= 0 )
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{
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TEST_ASSERT( mbedtls_mpi_cmp_mpi( &actual_mpi,
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&expected_mpi ) == 0 );
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}
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else
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{
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/* The library ignores the sign bit in ASN.1 INTEGERs
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* (which makes sense insofar as INTEGERs are sometimes
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* abused as bit strings), so the result of parsing them
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* is a positive integer such that expected_mpi +
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* actual_mpi = 2^n where n is the length of the content
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* of the INTEGER. (Leading ff octets don't matter for the
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* expected value, but they matter for the actual value.)
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* Test that we don't change from this behavior. If we
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* decide to fix the library to change the behavior on
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* negative INTEGERs, we'll fix this test code. */
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unsigned char *q = input->x + 1;
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size_t len;
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TEST_ASSERT( mbedtls_asn1_get_len( &q, input->x + input->len,
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&len ) == 0 );
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TEST_ASSERT( mbedtls_mpi_lset( &complement, 1 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_shift_l( &complement, len * 8 ) == 0 );
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TEST_ASSERT( mbedtls_mpi_add_mpi( &complement, &complement,
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&expected_mpi ) == 0 );
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TEST_ASSERT( mbedtls_mpi_cmp_mpi( &complement,
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&actual_mpi ) == 0 );
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}
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TEST_ASSERT( p == input->x + input->len );
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}
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#endif
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exit:
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#if defined(MBEDTLS_BIGNUM_C)
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mbedtls_mpi_free( &expected_mpi );
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mbedtls_mpi_free( &actual_mpi );
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mbedtls_mpi_free( &complement );
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#endif
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/*empty cleanup in some configurations*/ ;
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void get_enum( const data_t *input,
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const char *expected_hex, int expected_result )
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{
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unsigned char *p;
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long expected_value;
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int expected_result_for_enum = expected_result;
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int val;
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int ret;
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errno = 0;
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expected_value = strtol( expected_hex, NULL, 16 );
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if( expected_result == 0 &&
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( errno == ERANGE
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#if LONG_MAX > INT_MAX
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|| expected_value > INT_MAX || expected_value < INT_MIN
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#endif
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) )
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{
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/* The library returns the dubious error code INVALID_LENGTH
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* for integers that are out of range. */
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expected_result_for_enum = MBEDTLS_ERR_ASN1_INVALID_LENGTH;
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}
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if( expected_result == 0 && expected_value < 0 )
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{
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/* The library does not support negative INTEGERs and
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* returns the dubious error code INVALID_LENGTH.
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* Test that we preserve the historical behavior. If we
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* decide to change the behavior, we'll also change this test. */
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expected_result_for_enum = MBEDTLS_ERR_ASN1_INVALID_LENGTH;
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}
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p = input->x;
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ret = mbedtls_asn1_get_enum( &p, input->x + input->len, &val );
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TEST_EQUAL( ret, expected_result_for_enum );
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if( ret == 0 )
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{
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TEST_EQUAL( val, expected_value );
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TEST_ASSERT( p == input->x + input->len );
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}
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_BIGNUM_C */
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void get_mpi_too_large( )
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{
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unsigned char *buf = NULL;
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unsigned char *p;
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mbedtls_mpi actual_mpi;
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size_t too_many_octets =
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MBEDTLS_MPI_MAX_LIMBS * sizeof(mbedtls_mpi_uint) + 1;
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size_t size = too_many_octets + 6;
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mbedtls_mpi_init( &actual_mpi );
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ASSERT_ALLOC( buf, size );
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buf[0] = 0x02; /* tag: INTEGER */
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buf[1] = 0x84; /* 4-octet length */
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buf[2] = ( too_many_octets >> 24 ) & 0xff;
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buf[3] = ( too_many_octets >> 16 ) & 0xff;
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buf[4] = ( too_many_octets >> 8 ) & 0xff;
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buf[5] = too_many_octets & 0xff;
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buf[6] = 0x01; /* most significant octet */
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p = buf;
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TEST_EQUAL( mbedtls_asn1_get_mpi( &p, buf + size, &actual_mpi ),
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MBEDTLS_ERR_MPI_ALLOC_FAILED );
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exit:
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mbedtls_mpi_free( &actual_mpi );
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mbedtls_free( buf );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void get_bitstring( const data_t *input,
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int expected_length, int expected_unused_bits,
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int expected_result, int expected_result_null )
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{
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mbedtls_asn1_bitstring bs = { 0xdead, 0x21, NULL };
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unsigned char *p = input->x;
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TEST_EQUAL( mbedtls_asn1_get_bitstring( &p, input->x + input->len, &bs ),
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expected_result );
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if( expected_result == 0 )
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{
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TEST_EQUAL( bs.len, (size_t) expected_length );
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TEST_EQUAL( bs.unused_bits, expected_unused_bits );
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TEST_ASSERT( bs.p != NULL );
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TEST_EQUAL( bs.p - input->x + bs.len, input->len );
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TEST_ASSERT( p == input->x + input->len );
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}
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p = input->x;
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TEST_EQUAL( mbedtls_asn1_get_bitstring_null( &p, input->x + input->len,
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&bs.len ),
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expected_result_null );
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if( expected_result_null == 0 )
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{
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TEST_EQUAL( bs.len, (size_t) expected_length );
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if( expected_result == 0 )
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TEST_ASSERT( p == input->x + input->len - bs.len );
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}
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void get_sequence_of( const data_t *input, int tag,
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|
const char *description,
|
|
int expected_result )
|
|
{
|
|
mbedtls_asn1_sequence head = { { 0, 0, NULL }, NULL };
|
|
mbedtls_asn1_sequence *cur;
|
|
unsigned char *p = input->x;
|
|
const char *rest = description;
|
|
unsigned long n;
|
|
|
|
TEST_EQUAL( mbedtls_asn1_get_sequence_of( &p, input->x + input->len,
|
|
&head, tag ),
|
|
expected_result );
|
|
if( expected_result == 0 )
|
|
{
|
|
TEST_ASSERT( p == input->x + input->len );
|
|
|
|
if( ! *rest )
|
|
{
|
|
TEST_EQUAL( head.buf.tag, 0 );
|
|
TEST_ASSERT( head.buf.p == NULL );
|
|
TEST_EQUAL( head.buf.len, 0 );
|
|
TEST_ASSERT( head.next == NULL );
|
|
}
|
|
else
|
|
{
|
|
cur = &head;
|
|
while( *rest )
|
|
{
|
|
++test_info.step;
|
|
TEST_ASSERT( cur != NULL );
|
|
TEST_EQUAL( cur->buf.tag, tag );
|
|
n = strtoul( rest, (char **) &rest, 0 );
|
|
TEST_EQUAL( n, (size_t)( cur->buf.p - input->x ) );
|
|
++rest;
|
|
n = strtoul( rest, (char **) &rest, 0 );
|
|
TEST_EQUAL( n, cur->buf.len );
|
|
if( *rest )
|
|
++rest;
|
|
cur = cur->next;
|
|
}
|
|
TEST_ASSERT( cur == NULL );
|
|
}
|
|
}
|
|
|
|
exit:
|
|
mbedtls_asn1_sequence_free( head.next );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void get_alg( const data_t *input,
|
|
int oid_offset, int oid_length,
|
|
int params_tag, int params_offset, int params_length,
|
|
int total_length,
|
|
int expected_result )
|
|
{
|
|
mbedtls_asn1_buf oid = { -1, 0, NULL };
|
|
mbedtls_asn1_buf params = { -1, 0, NULL };
|
|
unsigned char *p = input->x;
|
|
int ret;
|
|
|
|
TEST_EQUAL( mbedtls_asn1_get_alg( &p, input->x + input->len,
|
|
&oid, ¶ms ),
|
|
expected_result );
|
|
if( expected_result == 0 )
|
|
{
|
|
TEST_EQUAL( oid.tag, MBEDTLS_ASN1_OID );
|
|
TEST_EQUAL( oid.p - input->x, oid_offset );
|
|
TEST_EQUAL( oid.len, (size_t) oid_length );
|
|
TEST_EQUAL( params.tag, params_tag );
|
|
if( params_offset != 0 )
|
|
TEST_EQUAL( params.p - input->x, params_offset );
|
|
else
|
|
TEST_ASSERT( params.p == NULL );
|
|
TEST_EQUAL( params.len, (size_t) params_length );
|
|
TEST_EQUAL( p - input->x, total_length );
|
|
}
|
|
|
|
ret = mbedtls_asn1_get_alg_null( &p, input->x + input->len, &oid );
|
|
if( expected_result == 0 && params_offset == 0 )
|
|
{
|
|
TEST_EQUAL( oid.tag, MBEDTLS_ASN1_OID );
|
|
TEST_EQUAL( oid.p - input->x, oid_offset );
|
|
TEST_EQUAL( oid.len, (size_t) oid_length );
|
|
TEST_EQUAL( p - input->x, total_length );
|
|
}
|
|
else
|
|
TEST_ASSERT( ret != 0 );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void find_named_data( data_t *oid0, data_t *oid1, data_t *oid2, data_t *oid3,
|
|
data_t *needle, int from, int position )
|
|
{
|
|
mbedtls_asn1_named_data nd[] ={
|
|
{ {0x06, oid0->len, oid0->x}, {0, 0, NULL}, NULL, 0 },
|
|
{ {0x06, oid1->len, oid1->x}, {0, 0, NULL}, NULL, 0 },
|
|
{ {0x06, oid2->len, oid2->x}, {0, 0, NULL}, NULL, 0 },
|
|
{ {0x06, oid3->len, oid3->x}, {0, 0, NULL}, NULL, 0 },
|
|
};
|
|
mbedtls_asn1_named_data *pointers[ARRAY_LENGTH( nd ) + 1];
|
|
size_t i;
|
|
mbedtls_asn1_named_data *found;
|
|
|
|
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
|
|
pointers[i] = &nd[i];
|
|
pointers[ARRAY_LENGTH( nd )] = NULL;
|
|
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
|
|
nd[i].next = pointers[i+1];
|
|
|
|
found = mbedtls_asn1_find_named_data( pointers[from],
|
|
(const char *) needle->x,
|
|
needle->len );
|
|
TEST_ASSERT( found == pointers[position] );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void free_named_data_null( )
|
|
{
|
|
mbedtls_asn1_free_named_data( NULL );
|
|
goto exit; /* Silence unused label warning */
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void free_named_data( int with_oid, int with_val, int with_next )
|
|
{
|
|
mbedtls_asn1_named_data next =
|
|
{ {0x06, 0, NULL}, {0, 0xcafe, NULL}, NULL, 0 };
|
|
mbedtls_asn1_named_data head =
|
|
{ {0x06, 0, NULL}, {0, 0, NULL}, NULL, 0 };
|
|
|
|
if( with_oid )
|
|
ASSERT_ALLOC( head.oid.p, 1 );
|
|
if( with_val )
|
|
ASSERT_ALLOC( head.val.p, 1 );
|
|
if( with_next )
|
|
head.next = &next;
|
|
|
|
mbedtls_asn1_free_named_data( &head );
|
|
TEST_ASSERT( head.oid.p == NULL );
|
|
TEST_ASSERT( head.val.p == NULL );
|
|
TEST_ASSERT( head.next == NULL );
|
|
TEST_ASSERT( next.val.len == 0xcafe );
|
|
|
|
exit:
|
|
mbedtls_free( head.oid.p );
|
|
mbedtls_free( head.val.p );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void free_named_data_list( int length )
|
|
{
|
|
mbedtls_asn1_named_data *head = NULL;
|
|
int i;
|
|
|
|
for( i = 0; i < length; i++ )
|
|
{
|
|
mbedtls_asn1_named_data *new = NULL;
|
|
ASSERT_ALLOC( new, sizeof( mbedtls_asn1_named_data ) );
|
|
new->next = head;
|
|
head = new;
|
|
}
|
|
|
|
mbedtls_asn1_free_named_data_list( &head );
|
|
TEST_ASSERT( head == NULL );
|
|
/* Most of the point of the test is that it doesn't leak memory.
|
|
* So this test is only really useful under a memory leak detection
|
|
* framework. */
|
|
exit:
|
|
mbedtls_asn1_free_named_data_list( &head );
|
|
}
|
|
/* END_CASE */
|