Fix memory leak and freeing without initialization in cert_write
* The variables `csr` and `issuer_crt` are initialized but not freed.
* The variable `entropy` is unconditionally freed in the cleanup section
but there's a conditional jump to that section before its initialization.
This cmmot Moves it to the other initializations happening before the
first conditional jump to the cleanup section.
Fixes #1422.
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index fa99461..3842ebc 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -242,6 +242,7 @@
mbedtls_pk_init( &loaded_subject_key );
mbedtls_mpi_init( &serial );
mbedtls_ctr_drbg_init( &ctr_drbg );
+ mbedtls_entropy_init( &entropy );
#if defined(MBEDTLS_X509_CSR_PARSE_C)
mbedtls_x509_csr_init( &csr );
#endif
@@ -475,7 +476,6 @@
mbedtls_printf( " . Seeding the random number generator..." );
fflush( stdout );
- mbedtls_entropy_init( &entropy );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
@@ -789,6 +789,10 @@
exit_code = MBEDTLS_EXIT_SUCCESS;
exit:
+#if defined(MBEDTLS_X509_CSR_PARSE_C)
+ mbedtls_x509_csr_free( &csr );
+#endif /* MBEDTLS_X509_CSR_PARSE_C */
+ mbedtls_x509_crt_free( &issuer_crt );
mbedtls_x509write_crt_free( &crt );
mbedtls_pk_free( &loaded_subject_key );
mbedtls_pk_free( &loaded_issuer_key );
