diff options
Diffstat (limited to 'src/pluto/mp_defs.c')
| -rw-r--r-- | src/pluto/mp_defs.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/pluto/mp_defs.c b/src/pluto/mp_defs.c index 201effc29..ee9dd0360 100644 --- a/src/pluto/mp_defs.c +++ b/src/pluto/mp_defs.c @@ -16,6 +16,9 @@ #include <freeswan.h> +#include <utils.h> +#include <asn1/asn1.h> + #include "constants.h" #include "defs.h" #include "mp_defs.h" @@ -68,3 +71,17 @@ n_to_mpz(MP_INT *mp, const u_char *nbytes, size_t nlen) mpz_add_ui(mp, mp, nbytes[i]); } } + +/* + * convert a MP integer into a DER coded ASN.1 object + */ +chunk_t +asn1_integer_from_mpz(const mpz_t value) +{ + size_t bits = mpz_sizeinbase(value, 2); /* size in bits */ + size_t size = 1 + bits / BITS_PER_BYTE; /* size in bytes */ + chunk_t n = mpz_to_n(value, size); + + return asn1_wrap(ASN1_INTEGER, "m", n); +} + |