diff options
Diffstat (limited to 'thirdparty/mbedtls/library/asn1write.c')
| -rw-r--r-- | thirdparty/mbedtls/library/asn1write.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/thirdparty/mbedtls/library/asn1write.c b/thirdparty/mbedtls/library/asn1write.c index 3811ef27a3..afa26a6be9 100644 --- a/thirdparty/mbedtls/library/asn1write.c +++ b/thirdparty/mbedtls/library/asn1write.c @@ -133,6 +133,11 @@ int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start, const mbedt // len = mbedtls_mpi_size( X ); + /* DER represents 0 with a sign bit (0=nonnegative) and 7 value bits, not + * as 0 digits. We need to end up with 020100, not with 0200. */ + if( len == 0 ) + len = 1; + if( *p < start || (size_t)( *p - start ) < len ) return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); @@ -472,7 +477,7 @@ mbedtls_asn1_named_data *mbedtls_asn1_store_named_data( cur->val.len = val_len; } - if( val != NULL ) + if( val != NULL && val_len != 0 ) memcpy( cur->val.p, val, val_len ); return( cur ); |