diff options
Diffstat (limited to 'src/libstrongswan/asn1/asn1.c')
| -rw-r--r-- | src/libstrongswan/asn1/asn1.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c index 85f906caa..d57444d67 100644 --- a/src/libstrongswan/asn1/asn1.c +++ b/src/libstrongswan/asn1/asn1.c @@ -255,7 +255,7 @@ chunk_t asn1_build_known_oid(int n) /* * Defined in header. */ -u_int asn1_length(chunk_t *blob) +size_t asn1_length(chunk_t *blob) { u_char n; size_t len; @@ -675,7 +675,7 @@ chunk_t asn1_simple_object(asn1_t tag, chunk_t content) } /** - * Build an ASN.1 BITSTRING object + * Build an ASN.1 BIT_STRING object */ chunk_t asn1_bitstring(const char *mode, chunk_t content) { @@ -692,6 +692,41 @@ chunk_t asn1_bitstring(const char *mode, chunk_t content) } /** + * Build an ASN.1 INTEGER object + */ +chunk_t asn1_integer(const char *mode, chunk_t content) +{ + chunk_t object; + 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); + } + pos = asn1_build_object(&object, ASN1_INTEGER, len); + if (len > content.len) + { + *pos++ = 0x00; + } + if (len) + { + memcpy(pos, content.ptr, content.len); + } + if (*mode == 'm') + { + free(content.ptr); + } + return object; +} + +/** * Build an ASN.1 object from a variable number of individual chunks. * Depending on the mode, chunks either are moved ('m') or copied ('c'). */ |