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Correct parsing checks in mbedtls_pk_parse_key

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Two code-paths in `mbedtls_pk_parse_key` returned success on a failure in `mbedtls_pk_setup`.
This commit is contained in:
Hanno Becker 2017-09-08 12:39:44 +01:00
parent 380aa64d65
commit 69f00bfbe1
1 changed files with 14 additions and 8 deletions
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22
library/pkparse.c
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@ -1221,29 +1221,35 @@ int mbedtls_pk_parse_key( mbedtls_pk_context *pk,
mbedtls_pk_free( pk ); mbedtls_pk_free( pk );
#if defined(MBEDTLS_RSA_C) #if defined(MBEDTLS_RSA_C)
if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA );
if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 || if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) ) == 0 ) ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ),
key, keylen ) ) != 0 )
{
mbedtls_pk_free( pk );
}
else
{ {
return( 0 ); return( 0 );
} }
mbedtls_pk_free( pk );
#endif /* MBEDTLS_RSA_C */ #endif /* MBEDTLS_RSA_C */
#if defined(MBEDTLS_ECP_C) #if defined(MBEDTLS_ECP_C)
if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY );
if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 || if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), key, keylen ) ) == 0 ) ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
key, keylen ) ) != 0 )
{
mbedtls_pk_free( pk );
}
else
{ {
return( 0 ); return( 0 );
} }
mbedtls_pk_free( pk );
#endif /* MBEDTLS_ECP_C */ #endif /* MBEDTLS_ECP_C */
return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT ); return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );