chromium/third_party/boringssl/src/crypto/ec_extra/ec_asn1.c

/* Written by Nils Larsch for the OpenSSL project. */
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 *
 * This product includes cryptographic software written by Eric Young
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]). */

#include <openssl/ec.h>

#include <limits.h>
#include <string.h>

#include <openssl/bytestring.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/nid.h>

#include "../fipsmodule/ec/internal.h"
#include "../bytestring/internal.h"
#include "../internal.h"


static const CBS_ASN1_TAG kParametersTag = …;
static const CBS_ASN1_TAG kPublicKeyTag = …;

// TODO(https://crbug.com/boringssl/497): Allow parsers to specify a list of
// acceptable groups, so parsers don't have to pull in all four.
ec_group_func;
static const ec_group_func kAllGroups[] = …;

EC_KEY *EC_KEY_parse_private_key(CBS *cbs, const EC_GROUP *group) { … }

int EC_KEY_marshal_private_key(CBB *cbb, const EC_KEY *key,
                               unsigned enc_flags) { … }

// kPrimeFieldOID is the encoding of 1.2.840.10045.1.1.
static const uint8_t kPrimeField[] = …;

struct explicit_prime_curve { … };

static int parse_explicit_prime_curve(CBS *in,
                                      struct explicit_prime_curve *out) { … }

// integers_equal returns one if |bytes| is a big-endian encoding of |bn|, and
// zero otherwise.
static int integers_equal(const CBS *bytes, const BIGNUM *bn) { … }

EC_GROUP *EC_KEY_parse_curve_name(CBS *cbs) { … }

int EC_KEY_marshal_curve_name(CBB *cbb, const EC_GROUP *group) { … }

EC_GROUP *EC_KEY_parse_parameters(CBS *cbs) { … }

int EC_POINT_point2cbb(CBB *out, const EC_GROUP *group, const EC_POINT *point,
                       point_conversion_form_t form, BN_CTX *ctx) { … }

EC_KEY *d2i_ECPrivateKey(EC_KEY **out, const uint8_t **inp, long len) { … }

int i2d_ECPrivateKey(const EC_KEY *key, uint8_t **outp) { … }

EC_KEY *d2i_ECParameters(EC_KEY **out_key, const uint8_t **inp, long len) { … }

int i2d_ECParameters(const EC_KEY *key, uint8_t **outp) { … }

EC_KEY *o2i_ECPublicKey(EC_KEY **keyp, const uint8_t **inp, long len) { … }

int i2o_ECPublicKey(const EC_KEY *key, uint8_t **outp) { … }

size_t EC_get_builtin_curves(EC_builtin_curve *out_curves,
                             size_t max_num_curves) { … }