diff options
Diffstat (limited to 'common/openpgp-oid.c')
| -rw-r--r-- | common/openpgp-oid.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/common/openpgp-oid.c b/common/openpgp-oid.c index 55f8f432d..8404b01a5 100644 --- a/common/openpgp-oid.c +++ b/common/openpgp-oid.c @@ -48,6 +48,7 @@ static struct { { "Curve25519", "1.3.6.1.4.1.3029.1.5.1", 255, "cv25519", PUBKEY_ALGO_ECDH }, { "Ed25519", "1.3.6.1.4.1.11591.15.1", 255, "ed25519", PUBKEY_ALGO_EDDSA }, + { "X448", "1.3.101.111", 448, "x448", PUBKEY_ALGO_ECDH }, { "NIST P-256", "1.2.840.10045.3.1.7", 256, "nistp256" }, { "NIST P-384", "1.3.132.0.34", 384, "nistp384" }, @@ -71,6 +72,9 @@ static const char oid_ed25519[] = static const char oid_cv25519[] = { 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01 }; +/* The OID for X448 in OpenPGP format. */ +static const char oid_x448[] = { 0x03, 0x2b, 0x65, 0x6f }; + /* A table to store keyalgo strings like "rsa2048 or "ed25519" so that * we do not need to allocate them. This is currently a simple array * but may eventually be changed to a fast data structure. Noet that @@ -334,6 +338,15 @@ openpgp_oidbuf_is_cv25519 (const void *buf, size_t len) } +/* Return true if (BUF,LEN) represents the OID for X448. */ +static int +openpgp_oidbuf_is_x448 (const void *buf, size_t len) +{ + return (buf && len == DIM (oid_x448) + && !memcmp (buf, oid_x448, DIM (oid_x448))); +} + + /* Return true if the MPI A represents the OID for Curve25519. */ int openpgp_oid_is_cv25519 (gcry_mpi_t a) @@ -349,6 +362,21 @@ openpgp_oid_is_cv25519 (gcry_mpi_t a) } +/* Return true if the MPI A represents the OID for X448. */ +int +openpgp_oid_is_x448 (gcry_mpi_t a) +{ + const unsigned char *buf; + unsigned int nbits; + + if (!a || !gcry_mpi_get_flag (a, GCRYMPI_FLAG_OPAQUE)) + return 0; + + buf = gcry_mpi_get_opaque (a, &nbits); + return openpgp_oidbuf_is_x448 (buf, (nbits+7)/8); +} + + /* 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 curve names. If R_ALGO is not NULL and a specific ECC algorithm is |