diff options
Diffstat (limited to 'library/ecdh.c')
| -rw-r--r-- | library/ecdh.c | 694 |
1 files changed, 694 insertions, 0 deletions
diff --git a/library/ecdh.c b/library/ecdh.c new file mode 100644 index 00000000000..b276c6adadf --- /dev/null +++ b/library/ecdh.c @@ -0,0 +1,694 @@ +/* + * Elliptic curve Diffie-Hellman + * + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later + */ + +/* + * References: + * + * SEC1 https://www.secg.org/sec1-v2.pdf + * RFC 4492 + */ + +#include "common.h" + +#if defined(MBEDTLS_ECDH_C) + +#include "mbedtls/ecdh.h" +#include "mbedtls/platform_util.h" +#include "mbedtls/error.h" + +#include <string.h> + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) +typedef mbedtls_ecdh_context mbedtls_ecdh_context_mbed; +#endif + +static mbedtls_ecp_group_id mbedtls_ecdh_grp_id( + const mbedtls_ecdh_context *ctx) +{ +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ctx->grp.id; +#else + return ctx->grp_id; +#endif +} + +int mbedtls_ecdh_can_do(mbedtls_ecp_group_id gid) +{ + /* At this time, all groups support ECDH. */ + (void) gid; + return 1; +} + +#if !defined(MBEDTLS_ECDH_GEN_PUBLIC_ALT) +/* + * Generate public key (restartable version) + * + * Note: this internal function relies on its caller preserving the value of + * the output parameter 'd' across continuation calls. This would not be + * acceptable for a public function but is OK here as we control call sites. + */ +static int ecdh_gen_public_restartable(mbedtls_ecp_group *grp, + mbedtls_mpi *d, mbedtls_ecp_point *Q, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + mbedtls_ecp_restart_ctx *rs_ctx) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + + int restarting = 0; +#if defined(MBEDTLS_ECP_RESTARTABLE) + restarting = (rs_ctx != NULL && rs_ctx->rsm != NULL); +#endif + /* If multiplication is in progress, we already generated a privkey */ + if (!restarting) { + MBEDTLS_MPI_CHK(mbedtls_ecp_gen_privkey(grp, d, f_rng, p_rng)); + } + + MBEDTLS_MPI_CHK(mbedtls_ecp_mul_restartable(grp, Q, d, &grp->G, + f_rng, p_rng, rs_ctx)); + +cleanup: + return ret; +} + +/* + * Generate public key + */ +int mbedtls_ecdh_gen_public(mbedtls_ecp_group *grp, mbedtls_mpi *d, mbedtls_ecp_point *Q, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng) +{ + return ecdh_gen_public_restartable(grp, d, Q, f_rng, p_rng, NULL); +} +#endif /* !MBEDTLS_ECDH_GEN_PUBLIC_ALT */ + +#if !defined(MBEDTLS_ECDH_COMPUTE_SHARED_ALT) +/* + * Compute shared secret (SEC1 3.3.1) + */ +static int ecdh_compute_shared_restartable(mbedtls_ecp_group *grp, + mbedtls_mpi *z, + const mbedtls_ecp_point *Q, const mbedtls_mpi *d, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng, + mbedtls_ecp_restart_ctx *rs_ctx) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + mbedtls_ecp_point P; + + mbedtls_ecp_point_init(&P); + + MBEDTLS_MPI_CHK(mbedtls_ecp_mul_restartable(grp, &P, d, Q, + f_rng, p_rng, rs_ctx)); + + if (mbedtls_ecp_is_zero(&P)) { + ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + goto cleanup; + } + + MBEDTLS_MPI_CHK(mbedtls_mpi_copy(z, &P.X)); + +cleanup: + mbedtls_ecp_point_free(&P); + + return ret; +} + +/* + * Compute shared secret (SEC1 3.3.1) + */ +int mbedtls_ecdh_compute_shared(mbedtls_ecp_group *grp, mbedtls_mpi *z, + const mbedtls_ecp_point *Q, const mbedtls_mpi *d, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng) +{ + return ecdh_compute_shared_restartable(grp, z, Q, d, + f_rng, p_rng, NULL); +} +#endif /* !MBEDTLS_ECDH_COMPUTE_SHARED_ALT */ + +static void ecdh_init_internal(mbedtls_ecdh_context_mbed *ctx) +{ + mbedtls_ecp_group_init(&ctx->grp); + mbedtls_mpi_init(&ctx->d); + mbedtls_ecp_point_init(&ctx->Q); + mbedtls_ecp_point_init(&ctx->Qp); + mbedtls_mpi_init(&ctx->z); + +#if defined(MBEDTLS_ECP_RESTARTABLE) + mbedtls_ecp_restart_init(&ctx->rs); +#endif +} + +mbedtls_ecp_group_id mbedtls_ecdh_get_grp_id(mbedtls_ecdh_context *ctx) +{ +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ctx->MBEDTLS_PRIVATE(grp).id; +#else + return ctx->MBEDTLS_PRIVATE(grp_id); +#endif +} + +/* + * Initialize context + */ +void mbedtls_ecdh_init(mbedtls_ecdh_context *ctx) +{ +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + ecdh_init_internal(ctx); + mbedtls_ecp_point_init(&ctx->Vi); + mbedtls_ecp_point_init(&ctx->Vf); + mbedtls_mpi_init(&ctx->_d); +#else + memset(ctx, 0, sizeof(mbedtls_ecdh_context)); + + ctx->var = MBEDTLS_ECDH_VARIANT_NONE; +#endif + ctx->point_format = MBEDTLS_ECP_PF_UNCOMPRESSED; +#if defined(MBEDTLS_ECP_RESTARTABLE) + ctx->restart_enabled = 0; +#endif +} + +static int ecdh_setup_internal(mbedtls_ecdh_context_mbed *ctx, + mbedtls_ecp_group_id grp_id) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + + ret = mbedtls_ecp_group_load(&ctx->grp, grp_id); + if (ret != 0) { + return MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE; + } + + return 0; +} + +/* + * Setup context + */ +int mbedtls_ecdh_setup(mbedtls_ecdh_context *ctx, mbedtls_ecp_group_id grp_id) +{ +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_setup_internal(ctx, grp_id); +#else + switch (grp_id) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECP_DP_CURVE25519: + ctx->point_format = MBEDTLS_ECP_PF_COMPRESSED; + ctx->var = MBEDTLS_ECDH_VARIANT_EVEREST; + ctx->grp_id = grp_id; + return mbedtls_everest_setup(&ctx->ctx.everest_ecdh, grp_id); +#endif + default: + ctx->point_format = MBEDTLS_ECP_PF_UNCOMPRESSED; + ctx->var = MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0; + ctx->grp_id = grp_id; + ecdh_init_internal(&ctx->ctx.mbed_ecdh); + return ecdh_setup_internal(&ctx->ctx.mbed_ecdh, grp_id); + } +#endif +} + +static void ecdh_free_internal(mbedtls_ecdh_context_mbed *ctx) +{ + mbedtls_ecp_group_free(&ctx->grp); + mbedtls_mpi_free(&ctx->d); + mbedtls_ecp_point_free(&ctx->Q); + mbedtls_ecp_point_free(&ctx->Qp); + mbedtls_mpi_free(&ctx->z); + +#if defined(MBEDTLS_ECP_RESTARTABLE) + mbedtls_ecp_restart_free(&ctx->rs); +#endif +} + +#if defined(MBEDTLS_ECP_RESTARTABLE) +/* + * Enable restartable operations for context + */ +void mbedtls_ecdh_enable_restart(mbedtls_ecdh_context *ctx) +{ + ctx->restart_enabled = 1; +} +#endif + +/* + * Free context + */ +void mbedtls_ecdh_free(mbedtls_ecdh_context *ctx) +{ + if (ctx == NULL) { + return; + } + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + mbedtls_ecp_point_free(&ctx->Vi); + mbedtls_ecp_point_free(&ctx->Vf); + mbedtls_mpi_free(&ctx->_d); + ecdh_free_internal(ctx); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + mbedtls_everest_free(&ctx->ctx.everest_ecdh); + break; +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + ecdh_free_internal(&ctx->ctx.mbed_ecdh); + break; + default: + break; + } + + ctx->point_format = MBEDTLS_ECP_PF_UNCOMPRESSED; + ctx->var = MBEDTLS_ECDH_VARIANT_NONE; + ctx->grp_id = MBEDTLS_ECP_DP_NONE; +#endif +} + +static int ecdh_make_params_internal(mbedtls_ecdh_context_mbed *ctx, + size_t *olen, int point_format, + unsigned char *buf, size_t blen, + int (*f_rng)(void *, + unsigned char *, + size_t), + void *p_rng, + int restart_enabled) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + size_t grp_len, pt_len; +#if defined(MBEDTLS_ECP_RESTARTABLE) + mbedtls_ecp_restart_ctx *rs_ctx = NULL; +#endif + + if (ctx->grp.pbits == 0) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + +#if defined(MBEDTLS_ECP_RESTARTABLE) + if (restart_enabled) { + rs_ctx = &ctx->rs; + } +#else + (void) restart_enabled; +#endif + + +#if defined(MBEDTLS_ECP_RESTARTABLE) + if ((ret = ecdh_gen_public_restartable(&ctx->grp, &ctx->d, &ctx->Q, + f_rng, p_rng, rs_ctx)) != 0) { + return ret; + } +#else + if ((ret = mbedtls_ecdh_gen_public(&ctx->grp, &ctx->d, &ctx->Q, + f_rng, p_rng)) != 0) { + return ret; + } +#endif /* MBEDTLS_ECP_RESTARTABLE */ + + if ((ret = mbedtls_ecp_tls_write_group(&ctx->grp, &grp_len, buf, + blen)) != 0) { + return ret; + } + + buf += grp_len; + blen -= grp_len; + + if ((ret = mbedtls_ecp_tls_write_point(&ctx->grp, &ctx->Q, point_format, + &pt_len, buf, blen)) != 0) { + return ret; + } + + *olen = grp_len + pt_len; + return 0; +} + +/* + * Setup and write the ServerKeyExchange parameters (RFC 4492) + * struct { + * ECParameters curve_params; + * ECPoint public; + * } ServerECDHParams; + */ +int mbedtls_ecdh_make_params(mbedtls_ecdh_context *ctx, size_t *olen, + unsigned char *buf, size_t blen, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng) +{ + int restart_enabled = 0; +#if defined(MBEDTLS_ECP_RESTARTABLE) + restart_enabled = ctx->restart_enabled; +#else + (void) restart_enabled; +#endif + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_make_params_internal(ctx, olen, ctx->point_format, buf, blen, + f_rng, p_rng, restart_enabled); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + return mbedtls_everest_make_params(&ctx->ctx.everest_ecdh, olen, + buf, blen, f_rng, p_rng); +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + return ecdh_make_params_internal(&ctx->ctx.mbed_ecdh, olen, + ctx->point_format, buf, blen, + f_rng, p_rng, + restart_enabled); + default: + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } +#endif +} + +static int ecdh_read_params_internal(mbedtls_ecdh_context_mbed *ctx, + const unsigned char **buf, + const unsigned char *end) +{ + return mbedtls_ecp_tls_read_point(&ctx->grp, &ctx->Qp, buf, + (size_t) (end - *buf)); +} + +/* + * Read the ServerKeyExchange parameters (RFC 4492) + * struct { + * ECParameters curve_params; + * ECPoint public; + * } ServerECDHParams; + */ +int mbedtls_ecdh_read_params(mbedtls_ecdh_context *ctx, + const unsigned char **buf, + const unsigned char *end) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + mbedtls_ecp_group_id grp_id; + if ((ret = mbedtls_ecp_tls_read_group_id(&grp_id, buf, (size_t) (end - *buf))) + != 0) { + return ret; + } + + if ((ret = mbedtls_ecdh_setup(ctx, grp_id)) != 0) { + return ret; + } + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_read_params_internal(ctx, buf, end); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + return mbedtls_everest_read_params(&ctx->ctx.everest_ecdh, + buf, end); +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + return ecdh_read_params_internal(&ctx->ctx.mbed_ecdh, + buf, end); + default: + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } +#endif +} + +static int ecdh_get_params_internal(mbedtls_ecdh_context_mbed *ctx, + const mbedtls_ecp_keypair *key, + mbedtls_ecdh_side side) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + + /* If it's not our key, just import the public part as Qp */ + if (side == MBEDTLS_ECDH_THEIRS) { + return mbedtls_ecp_copy(&ctx->Qp, &key->Q); + } + + /* Our key: import public (as Q) and private parts */ + if (side != MBEDTLS_ECDH_OURS) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + + if ((ret = mbedtls_ecp_copy(&ctx->Q, &key->Q)) != 0 || + (ret = mbedtls_mpi_copy(&ctx->d, &key->d)) != 0) { + return ret; + } + + return 0; +} + +/* + * Get parameters from a keypair + */ +int mbedtls_ecdh_get_params(mbedtls_ecdh_context *ctx, + const mbedtls_ecp_keypair *key, + mbedtls_ecdh_side side) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + if (side != MBEDTLS_ECDH_OURS && side != MBEDTLS_ECDH_THEIRS) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + + if (mbedtls_ecdh_grp_id(ctx) == MBEDTLS_ECP_DP_NONE) { + /* This is the first call to get_params(). Set up the context + * for use with the group. */ + if ((ret = mbedtls_ecdh_setup(ctx, key->grp.id)) != 0) { + return ret; + } + } else { + /* This is not the first call to get_params(). Check that the + * current key's group is the same as the context's, which was set + * from the first key's group. */ + if (mbedtls_ecdh_grp_id(ctx) != key->grp.id) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + } + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_get_params_internal(ctx, key, side); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + { + mbedtls_everest_ecdh_side s = side == MBEDTLS_ECDH_OURS ? + MBEDTLS_EVEREST_ECDH_OURS : + MBEDTLS_EVEREST_ECDH_THEIRS; + return mbedtls_everest_get_params(&ctx->ctx.everest_ecdh, + key, s); + } +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + return ecdh_get_params_internal(&ctx->ctx.mbed_ecdh, + key, side); + default: + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } +#endif +} + +static int ecdh_make_public_internal(mbedtls_ecdh_context_mbed *ctx, + size_t *olen, int point_format, + unsigned char *buf, size_t blen, + int (*f_rng)(void *, + unsigned char *, + size_t), + void *p_rng, + int restart_enabled) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; +#if defined(MBEDTLS_ECP_RESTARTABLE) + mbedtls_ecp_restart_ctx *rs_ctx = NULL; +#endif + + if (ctx->grp.pbits == 0) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + +#if defined(MBEDTLS_ECP_RESTARTABLE) + if (restart_enabled) { + rs_ctx = &ctx->rs; + } +#else + (void) restart_enabled; +#endif + +#if defined(MBEDTLS_ECP_RESTARTABLE) + if ((ret = ecdh_gen_public_restartable(&ctx->grp, &ctx->d, &ctx->Q, + f_rng, p_rng, rs_ctx)) != 0) { + return ret; + } +#else + if ((ret = mbedtls_ecdh_gen_public(&ctx->grp, &ctx->d, &ctx->Q, + f_rng, p_rng)) != 0) { + return ret; + } +#endif /* MBEDTLS_ECP_RESTARTABLE */ + + return mbedtls_ecp_tls_write_point(&ctx->grp, &ctx->Q, point_format, olen, + buf, blen); +} + +/* + * Setup and export the client public value + */ +int mbedtls_ecdh_make_public(mbedtls_ecdh_context *ctx, size_t *olen, + unsigned char *buf, size_t blen, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng) +{ + int restart_enabled = 0; +#if defined(MBEDTLS_ECP_RESTARTABLE) + restart_enabled = ctx->restart_enabled; +#endif + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_make_public_internal(ctx, olen, ctx->point_format, buf, blen, + f_rng, p_rng, restart_enabled); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + return mbedtls_everest_make_public(&ctx->ctx.everest_ecdh, olen, + buf, blen, f_rng, p_rng); +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + return ecdh_make_public_internal(&ctx->ctx.mbed_ecdh, olen, + ctx->point_format, buf, blen, + f_rng, p_rng, + restart_enabled); + default: + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } +#endif +} + +static int ecdh_read_public_internal(mbedtls_ecdh_context_mbed *ctx, + const unsigned char *buf, size_t blen) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + const unsigned char *p = buf; + + if ((ret = mbedtls_ecp_tls_read_point(&ctx->grp, &ctx->Qp, &p, + blen)) != 0) { + return ret; + } + + if ((size_t) (p - buf) != blen) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + + return 0; +} + +/* + * Parse and import the client's public value + */ +int mbedtls_ecdh_read_public(mbedtls_ecdh_context *ctx, + const unsigned char *buf, size_t blen) +{ +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_read_public_internal(ctx, buf, blen); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + return mbedtls_everest_read_public(&ctx->ctx.everest_ecdh, + buf, blen); +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + return ecdh_read_public_internal(&ctx->ctx.mbed_ecdh, + buf, blen); + default: + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } +#endif +} + +static int ecdh_calc_secret_internal(mbedtls_ecdh_context_mbed *ctx, + size_t *olen, unsigned char *buf, + size_t blen, + int (*f_rng)(void *, + unsigned char *, + size_t), + void *p_rng, + int restart_enabled) +{ + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; +#if defined(MBEDTLS_ECP_RESTARTABLE) + mbedtls_ecp_restart_ctx *rs_ctx = NULL; +#endif + + if (ctx == NULL || ctx->grp.pbits == 0) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + +#if defined(MBEDTLS_ECP_RESTARTABLE) + if (restart_enabled) { + rs_ctx = &ctx->rs; + } +#else + (void) restart_enabled; +#endif + +#if defined(MBEDTLS_ECP_RESTARTABLE) + if ((ret = ecdh_compute_shared_restartable(&ctx->grp, &ctx->z, &ctx->Qp, + &ctx->d, f_rng, p_rng, + rs_ctx)) != 0) { + return ret; + } +#else + if ((ret = mbedtls_ecdh_compute_shared(&ctx->grp, &ctx->z, &ctx->Qp, + &ctx->d, f_rng, p_rng)) != 0) { + return ret; + } +#endif /* MBEDTLS_ECP_RESTARTABLE */ + + if (mbedtls_mpi_size(&ctx->z) > blen) { + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } + + *olen = ctx->grp.pbits / 8 + ((ctx->grp.pbits % 8) != 0); + + if (mbedtls_ecp_get_type(&ctx->grp) == MBEDTLS_ECP_TYPE_MONTGOMERY) { + return mbedtls_mpi_write_binary_le(&ctx->z, buf, *olen); + } + + return mbedtls_mpi_write_binary(&ctx->z, buf, *olen); +} + +/* + * Derive and export the shared secret + */ +int mbedtls_ecdh_calc_secret(mbedtls_ecdh_context *ctx, size_t *olen, + unsigned char *buf, size_t blen, + int (*f_rng)(void *, unsigned char *, size_t), + void *p_rng) +{ + int restart_enabled = 0; +#if defined(MBEDTLS_ECP_RESTARTABLE) + restart_enabled = ctx->restart_enabled; +#endif + +#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT) + return ecdh_calc_secret_internal(ctx, olen, buf, blen, f_rng, p_rng, + restart_enabled); +#else + switch (ctx->var) { +#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) + case MBEDTLS_ECDH_VARIANT_EVEREST: + return mbedtls_everest_calc_secret(&ctx->ctx.everest_ecdh, olen, + buf, blen, f_rng, p_rng); +#endif + case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0: + return ecdh_calc_secret_internal(&ctx->ctx.mbed_ecdh, olen, buf, + blen, f_rng, p_rng, + restart_enabled); + default: + return MBEDTLS_ERR_ECP_BAD_INPUT_DATA; + } +#endif +} +#endif /* MBEDTLS_ECDH_C */ |