diff options
Diffstat (limited to 'src/libstrongswan/asn1/asn1.c')
| -rw-r--r-- | src/libstrongswan/asn1/asn1.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c index 4cb38d126..c9f6fce25 100644 --- a/src/libstrongswan/asn1/asn1.c +++ b/src/libstrongswan/asn1/asn1.c @@ -28,7 +28,7 @@ /** * Commonly used ASN1 values. */ -const chunk_t ASN1_INTEGER_0 = chunk_from_chars(0x02, 0x00); +const chunk_t ASN1_INTEGER_0 = chunk_from_chars(0x02, 0x01, 0x00); const chunk_t ASN1_INTEGER_1 = chunk_from_chars(0x02, 0x01, 0x01); const chunk_t ASN1_INTEGER_2 = chunk_from_chars(0x02, 0x01, 0x02); @@ -228,7 +228,8 @@ size_t asn1_length(chunk_t *blob) /* read length field, skip tag and length */ n = blob->ptr[1]; - *blob = chunk_skip(*blob, 2); + blob->ptr += 2; + blob->len -= 2; if ((n & 0x80) == 0) { /* single length octet */ @@ -760,16 +761,13 @@ chunk_t asn1_integer(const char *mode, chunk_t content) size_t len; u_char *pos; - if (content.len == 0 || (content.len == 1 && *content.ptr == 0x00)) - { - /* a zero ASN.1 integer does not have a value field */ - len = 0; - } - else - { - /* ASN.1 integers must be positive numbers in two's complement */ - len = content.len + ((*content.ptr & 0x80) ? 1 : 0); + if (content.len == 0) + { /* make sure 0 is encoded properly */ + content = chunk_from_chars(0x00); } + + /* ASN.1 integers must be positive numbers in two's complement */ + len = content.len + ((*content.ptr & 0x80) ? 1 : 0); pos = asn1_build_object(&object, ASN1_INTEGER, len); if (len > content.len) { |