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Avoid allocating empty buffers when handling length-0 CRTs

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This commit is contained in:
Hanno Becker 2019-05-03 12:37:12 +01:00
parent 0ed348a14e
commit 7b8e11e724
1 changed files with 5 additions and 1 deletions
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6
library/x509_crt.c
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@ -1445,7 +1445,11 @@ static int x509_crt_parse_der_core( mbedtls_x509_crt *crt,
} }
else else
{ {
crt->raw.p = mbedtls_calloc( 1, buflen ); /* Call mbedtls_calloc with buflen + 1 in order to avoid potential
* return of NULL in case of length 0 certificates, which we want
* to cleanly fail with MBEDTLS_ERR_X509_INVALID_FORMAT in the
* core parsing routine, but not here. */
crt->raw.p = mbedtls_calloc( 1, buflen + 1 );
if( crt->raw.p == NULL ) if( crt->raw.p == NULL )
return( MBEDTLS_ERR_X509_ALLOC_FAILED ); return( MBEDTLS_ERR_X509_ALLOC_FAILED );
crt->raw.len = buflen; crt->raw.len = buflen;