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Address user reported coverity issues.

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This commit is contained in:
Janos Follath 2016-05-31 14:03:54 +01:00 committed by Simon Butcher
parent f991128d40
commit 98e28a74e3
17 changed files with 81 additions and 41 deletions
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1
include/mbedtls/cipher.h
View File

@ -57,6 +57,7 @@
#define MBEDTLS_ERR_CIPHER_INVALID_PADDING -0x6200 /**< Input data contains invalid padding and is rejected. */
#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED -0x6280 /**< Decryption of block requires a full block. */
#define MBEDTLS_ERR_CIPHER_AUTH_FAILED -0x6300 /**< Authentication failed (for AEAD modes). */
#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT -0x6380 /**< The context is invalid, eg because it was free()ed. */
#define MBEDTLS_CIPHER_VARIABLE_IV_LEN 0x01 /**< Cipher accepts IVs of variable length */
#define MBEDTLS_CIPHER_VARIABLE_KEY_LEN 0x02 /**< Cipher accepts keys of variable length */

2
library/base64.c
View File

@ -97,7 +97,7 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
n *= 4;
if( dlen < n + 1 )
if( ( dlen < n + 1 ) || ( NULL == dst ) )
{
*olen = n + 1;
return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );

34
library/cipher.c
View File

@ -252,6 +252,7 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
size_t ilen, unsigned char *output, size_t *olen )
{
int ret;
size_t block_size = 0;
if( NULL == ctx || NULL == ctx->cipher_info || NULL == olen )
{
@ -259,10 +260,11 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
}
*olen = 0;
block_size = mbedtls_cipher_get_block_size( ctx );
if( ctx->cipher_info->mode == MBEDTLS_MODE_ECB )
{
if( ilen != mbedtls_cipher_get_block_size( ctx ) )
if( ilen != block_size )
return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
*olen = ilen;
@ -285,8 +287,13 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
}
#endif
if ( 0 == block_size )
{
return MBEDTLS_ERR_CIPHER_INVALID_CONTEXT;
}
if( input == output &&
( ctx->unprocessed_len != 0 || ilen % mbedtls_cipher_get_block_size( ctx ) ) )
( ctx->unprocessed_len != 0 || ilen % block_size ) )
{
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
@ -300,9 +307,9 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
* If there is not enough data for a full block, cache it.
*/
if( ( ctx->operation == MBEDTLS_DECRYPT &&
ilen + ctx->unprocessed_len <= mbedtls_cipher_get_block_size( ctx ) ) ||
ilen + ctx->unprocessed_len <= block_size ) ||
( ctx->operation == MBEDTLS_ENCRYPT &&
ilen + ctx->unprocessed_len < mbedtls_cipher_get_block_size( ctx ) ) )
ilen + ctx->unprocessed_len < block_size ) )
{
memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
ilen );
@ -314,22 +321,22 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
/*
* Process cached data first
*/
if( ctx->unprocessed_len != 0 )
if( 0 != ctx->unprocessed_len )
{
copy_len = mbedtls_cipher_get_block_size( ctx ) - ctx->unprocessed_len;
copy_len = block_size - ctx->unprocessed_len;
memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
copy_len );
if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
ctx->operation, mbedtls_cipher_get_block_size( ctx ), ctx->iv,
ctx->operation, block_size, ctx->iv,
ctx->unprocessed_data, output ) ) )
{
return( ret );
}
*olen += mbedtls_cipher_get_block_size( ctx );
output += mbedtls_cipher_get_block_size( ctx );
*olen += block_size;
output += block_size;
ctx->unprocessed_len = 0;
input += copy_len;
@ -341,9 +348,14 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
*/
if( 0 != ilen )
{
copy_len = ilen % mbedtls_cipher_get_block_size( ctx );
if( 0 == block_size )
{
return MBEDTLS_ERR_CIPHER_INVALID_CONTEXT;
}
copy_len = ilen % block_size;
if( copy_len == 0 && ctx->operation == MBEDTLS_DECRYPT )
copy_len = mbedtls_cipher_get_block_size( ctx );
copy_len = block_size;
memcpy( ctx->unprocessed_data, &( input[ilen - copy_len] ),
copy_len );

2
library/ecp.c
View File

@ -1827,7 +1827,9 @@ int mbedtls_ecp_gen_keypair_base( mbedtls_ecp_group *grp,
/* [M225] page 5 */
size_t b;
do {
MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( d, n_size, f_rng, p_rng ) );
} while( mbedtls_mpi_bitlen( d ) == 0);
/* Make sure the most significant bit is nbits */
b = mbedtls_mpi_bitlen( d ) - 1; /* mbedtls_mpi_bitlen is one-based */

2
library/error.c
View File

@ -183,6 +183,8 @@ void mbedtls_strerror( int ret, char *buf, size_t buflen )
mbedtls_snprintf( buf, buflen, "CIPHER - Decryption of block requires a full block" );
if( use_ret == -(MBEDTLS_ERR_CIPHER_AUTH_FAILED) )
mbedtls_snprintf( buf, buflen, "CIPHER - Authentication failed (for AEAD modes)" );
if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_CONTEXT) )
mbedtls_snprintf( buf, buflen, "CIPHER - The context is invalid, eg because it was free()ed" );
#endif /* MBEDTLS_CIPHER_C */
#if defined(MBEDTLS_DHM_C)

16
library/x509_crt.c
View File

@ -970,7 +970,9 @@ int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain, const unsigned char *bu
int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen )
{
int success = 0, first_error = 0, total_failed = 0;
#if defined(MBEDTLS_PEM_PARSE_C)
int buf_format = MBEDTLS_X509_FORMAT_DER;
#endif
/*
* Check for valid input
@ -988,10 +990,12 @@ int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, s
{
buf_format = MBEDTLS_X509_FORMAT_PEM;
}
#endif
if( buf_format == MBEDTLS_X509_FORMAT_DER )
return mbedtls_x509_crt_parse_der( chain, buf, buflen );
#else
return mbedtls_x509_crt_parse_der( chain, buf, buflen );
#endif
#if defined(MBEDTLS_PEM_PARSE_C)
if( buf_format == MBEDTLS_X509_FORMAT_PEM )
@ -1064,7 +1068,6 @@ int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, s
success = 1;
}
}
#endif /* MBEDTLS_PEM_PARSE_C */
if( success )
return( total_failed );
@ -1072,6 +1075,7 @@ int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, s
return( first_error );
else
return( MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT );
#endif /* MBEDTLS_PEM_PARSE_C */
}
#if defined(MBEDTLS_FS_IO)
@ -1353,6 +1357,14 @@ int mbedtls_x509_crt_info( char *buf, size_t size, const char *prefix,
p = buf;
n = size;
if( NULL == crt )
{
ret = mbedtls_snprintf( p, n, "\nCertificate is uninitialised!\n" );
MBEDTLS_X509_SAFE_SNPRINTF;
return( (int) ( size - n ) );
}
ret = mbedtls_snprintf( p, n, "%scert. version : %d\n",
prefix, crt->version );
MBEDTLS_X509_SAFE_SNPRINTF;

1
programs/pkey/dh_client.c
View File

@ -125,6 +125,7 @@ int main( void )
( ret = mbedtls_mpi_read_file( &rsa.E, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
fclose( f );
goto exit;
}

1
programs/pkey/dh_genprime.c
View File

@ -172,6 +172,7 @@ int main( int argc, char **argv )
( ret = mbedtls_mpi_write_file( "G = ", &G, 16, fout ) != 0 ) )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_write_file returned %d\n\n", ret );
fclose( fout );
goto exit;
}

2
programs/pkey/dh_server.c
View File

@ -132,6 +132,7 @@ int main( void )
( ret = mbedtls_mpi_read_file( &rsa.QP, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
fclose( f );
goto exit;
}
@ -157,6 +158,7 @@ int main( void )
mbedtls_mpi_read_file( &dhm.G, 16, f ) != 0 )
{
mbedtls_printf( " failed\n ! Invalid DH parameter file\n\n" );
fclose( f );
goto exit;
}

1
programs/pkey/pk_sign.c
View File

@ -142,6 +142,7 @@ int main( int argc, char *argv[] )
if( fwrite( buf, 1, olen, f ) != olen )
{
mbedtls_printf( "failed\n ! fwrite failed\n\n" );
fclose( f );
goto exit;
}

1
programs/pkey/rsa_decrypt.c
View File

@ -116,6 +116,7 @@ int main( int argc, char *argv[] )
( ret = mbedtls_mpi_read_file( &rsa.QP, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
fclose( f );
goto exit;
}

1
programs/pkey/rsa_encrypt.c
View File

@ -110,6 +110,7 @@ int main( int argc, char *argv[] )
( ret = mbedtls_mpi_read_file( &rsa.E, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
fclose( f );
goto exit;
}

1
programs/pkey/rsa_sign.c
View File

@ -98,6 +98,7 @@ int main( int argc, char *argv[] )
( ret = mbedtls_mpi_read_file( &rsa.QP, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
fclose( f );
goto exit;
}

1
programs/pkey/rsa_sign_pss.c
View File

@ -153,6 +153,7 @@ int main( int argc, char *argv[] )
if( fwrite( buf, 1, olen, f ) != olen )
{
mbedtls_printf( "failed\n ! fwrite failed\n\n" );
fclose( f );
goto exit;
}

1
programs/pkey/rsa_verify.c
View File

@ -89,6 +89,7 @@ int main( int argc, char *argv[] )
( ret = mbedtls_mpi_read_file( &rsa.E, 16, f ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_mpi_read_file returned %d\n\n", ret );
fclose( f );
goto exit;
}

3
programs/test/selftest.c
View File

@ -397,6 +397,7 @@ int main( int argc, char *argv[] )
if( suites_failed > 0)
mbedtls_exit( MBEDTLS_EXIT_FAILURE );
mbedtls_exit( MBEDTLS_EXIT_SUCCESS );
/* return() is here to prevent compiler warnings */
return( 0 );
}