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| author | Nikos Mavrogiannopoulos <nmav@redhat.com> | 2017-04-04 15:53:05 +0200 |
|---|---|---|
| committer | Nikos Mavrogiannopoulos <nmav@redhat.com> | 2017-04-06 12:57:07 +0200 |
| commit | a2cf89a42aff91e009ca024d24bee33970c37103 (patch) | |
| tree | 3b4bc774bfefd5678bc776ec31694e4ebfda6d76 | |
| parent | 28e723ca0b830abe3b36f401b001d74359a6c200 (diff) | |
| download | gnutls-a2cf89a42aff91e009ca024d24bee33970c37103.tar.gz | |
_gnutls_x509_write_uint32: ensure we prepend leading zero when writing
Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
| -rw-r--r-- | lib/x509/mpi.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/lib/x509/mpi.c b/lib/x509/mpi.c index 2e7cdc2802..2bb3e54aaa 100644 --- a/lib/x509/mpi.c +++ b/lib/x509/mpi.c @@ -28,6 +28,7 @@ #include "common.h" #include "x509_int.h" #include <num.h> +#include <limits.h> /* Reads an Integer from the DER encoded data */ @@ -319,12 +320,17 @@ _gnutls_x509_read_uint(ASN1_TYPE node, const char *value, int _gnutls_x509_write_uint32(ASN1_TYPE node, const char *value, uint32_t num) { - uint8_t tmpstr[4]; + uint8_t tmpstr[5]; int result; - _gnutls_write_uint32(num, tmpstr); + tmpstr[0] = 0; + _gnutls_write_uint32(num, tmpstr+1); - result = asn1_write_value(node, value, tmpstr, 4); + if (tmpstr[1] > SCHAR_MAX) { + result = asn1_write_value(node, value, tmpstr, 5); + } else { + result = asn1_write_value(node, value, tmpstr+1, 4); + } if (result != ASN1_SUCCESS) { gnutls_assert(); |