diff options
Diffstat (limited to 'common/openpgp-oid.c')
| -rw-r--r-- | common/openpgp-oid.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/common/openpgp-oid.c b/common/openpgp-oid.c index af91bb1aa..afda37605 100644 --- a/common/openpgp-oid.c +++ b/common/openpgp-oid.c @@ -45,6 +45,7 @@ static struct { const char *alias; /* NULL or alternative name of the curve. */ } oidtable[] = { + { "Curve25519", "1.3.6.1.4.1.3029.1.5.1", 255, "crv25519" }, { "Ed25519", "1.3.6.1.4.1.11591.15.1", 255, "ed25519" }, { "NIST P-256", "1.2.840.10045.3.1.7", 256, "nistp256" }, @@ -65,6 +66,10 @@ static struct { static const char oid_ed25519[] = { 0x09, 0x2b, 0x06, 0x01, 0x04, 0x01, 0xda, 0x47, 0x0f, 0x01 }; +/* The OID for Curve25519 in OpenPGP format. */ +static const char oid_crv25519[] = + { 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01 }; + /* Helper for openpgp_oid_from_str. */ static size_t @@ -291,6 +296,22 @@ openpgp_oid_is_ed25519 (gcry_mpi_t a) } +int +openpgp_oid_is_crv25519 (gcry_mpi_t a) +{ + const unsigned char *buf; + unsigned int nbits; + size_t n; + + if (!a || !gcry_mpi_get_flag (a, GCRYMPI_FLAG_OPAQUE)) + return 0; + + buf = gcry_mpi_get_opaque (a, &nbits); + n = (nbits+7)/8; + return (n == DIM (oid_crv25519) + && !memcmp (buf, oid_crv25519, DIM (oid_crv25519))); +} + /* Map the Libgcrypt ECC curve NAME to an OID. If R_NBITS is not NULL store the bit size of the curve there. Returns NULL for unknown |