+++ /dev/null
-/*
- * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-/*
- * ECDSA low level APIs are deprecated for public use, but still ok for
- * internal use.
- */
-#include "internal/deprecated.h"
-
-#include "internal/cryptlib.h"
-#include <openssl/asn1t.h>
-#include <openssl/ec.h>
-#include <openssl/evp.h>
-#include "crypto/evp.h"
-#include "crypto/sm2.h"
-#include "crypto/sm2err.h"
-#include "crypto/ec.h"
-
-/* EC pkey context structure */
-
-typedef struct {
- /* message digest */
- const EVP_MD *md;
- /* Distinguishing Identifier, ISO/IEC 15946-3, FIPS 196 */
- uint8_t *id;
- size_t id_len;
- /* id_set indicates if the 'id' field is set (1) or not (0) */
- int id_set;
-} SM2_PKEY_CTX;
-
-static int pkey_sm2_init(EVP_PKEY_CTX *ctx)
-{
- SM2_PKEY_CTX *smctx;
-
- if ((smctx = OPENSSL_zalloc(sizeof(*smctx))) == NULL) {
- SM2err(SM2_F_PKEY_SM2_INIT, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- ctx->data = smctx;
- return 1;
-}
-
-static void pkey_sm2_cleanup(EVP_PKEY_CTX *ctx)
-{
- SM2_PKEY_CTX *smctx = ctx->data;
-
- if (smctx != NULL) {
- OPENSSL_free(smctx->id);
- OPENSSL_free(smctx);
- ctx->data = NULL;
- }
-}
-
-static int pkey_sm2_copy(EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src)
-{
- SM2_PKEY_CTX *dctx, *sctx;
-
- if (!pkey_sm2_init(dst))
- return 0;
- sctx = src->data;
- dctx = dst->data;
- if (sctx->id != NULL) {
- dctx->id = OPENSSL_malloc(sctx->id_len);
- if (dctx->id == NULL) {
- SM2err(SM2_F_PKEY_SM2_COPY, ERR_R_MALLOC_FAILURE);
- pkey_sm2_cleanup(dst);
- return 0;
- }
- memcpy(dctx->id, sctx->id, sctx->id_len);
- }
- dctx->id_len = sctx->id_len;
- dctx->id_set = sctx->id_set;
- dctx->md = sctx->md;
-
- return 1;
-}
-
-static int pkey_sm2_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
- const unsigned char *tbs, size_t tbslen)
-{
- int ret;
- unsigned int sltmp;
- EC_KEY *ec = ctx->pkey->pkey.ec;
- const int sig_sz = ECDSA_size(ctx->pkey->pkey.ec);
-
- if (sig_sz <= 0) {
- return 0;
- }
-
- if (sig == NULL) {
- *siglen = (size_t)sig_sz;
- return 1;
- }
-
- if (*siglen < (size_t)sig_sz) {
- SM2err(SM2_F_PKEY_SM2_SIGN, SM2_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- ret = sm2_internal_sign(tbs, tbslen, sig, &sltmp, ec);
-
- if (ret <= 0)
- return ret;
- *siglen = (size_t)sltmp;
- return 1;
-}
-
-static int pkey_sm2_verify(EVP_PKEY_CTX *ctx,
- const unsigned char *sig, size_t siglen,
- const unsigned char *tbs, size_t tbslen)
-{
- EC_KEY *ec = ctx->pkey->pkey.ec;
-
- return sm2_internal_verify(tbs, tbslen, sig, siglen, ec);
-}
-
-static int pkey_sm2_encrypt(EVP_PKEY_CTX *ctx,
- unsigned char *out, size_t *outlen,
- const unsigned char *in, size_t inlen)
-{
- int ret;
- EC_KEY *ec = ctx->pkey->pkey.ec;
- SM2_PKEY_CTX *dctx = ctx->data;
- const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;
- OPENSSL_CTX *libctx = ec_key_get_libctx(ec);
- const char *propq = ec_key_get0_propq(ec);
- EVP_MD *fetched_md = NULL;
-
- if (out == NULL) {
- if (!sm2_ciphertext_size(ec, md, inlen, outlen))
- return -1;
- else
- return 1;
- }
-
- fetched_md = EVP_MD_fetch(libctx, EVP_MD_name(md), propq);
- if (fetched_md == NULL)
- return 0;
- ret = sm2_encrypt(ec, fetched_md, in, inlen, out, outlen);
- EVP_MD_free(fetched_md);
- return ret;
-}
-
-static int pkey_sm2_decrypt(EVP_PKEY_CTX *ctx,
- unsigned char *out, size_t *outlen,
- const unsigned char *in, size_t inlen)
-{
- int ret;
- EC_KEY *ec = ctx->pkey->pkey.ec;
- SM2_PKEY_CTX *dctx = ctx->data;
- const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;
- OPENSSL_CTX *libctx = ec_key_get_libctx(ec);
- const char *propq = ec_key_get0_propq(ec);
- EVP_MD *fetched_md = NULL;
-
- if (out == NULL) {
- if (!sm2_plaintext_size(ec, md, inlen, outlen))
- return -1;
- else
- return 1;
- }
-
- fetched_md = EVP_MD_fetch(libctx, EVP_MD_name(md), propq);
- if (fetched_md == NULL)
- return 0;
- ret = sm2_decrypt(ec, fetched_md, in, inlen, out, outlen);
- EVP_MD_free(fetched_md);
- return ret;
-}
-
-static int pkey_sm2_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
-{
- SM2_PKEY_CTX *smctx = ctx->data;
- uint8_t *tmp_id;
-
- switch (type) {
- case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
- /*
- * This control could be removed, which would signal it being
- * unsupported. However, that means that when the caller uses
- * the correct curve, it may interpret the unsupported signal
- * as an error, so it's better to accept the control, check the
- * value and return a corresponding value.
- */
- if (p1 != NID_sm2) {
- SM2err(SM2_F_PKEY_SM2_CTRL, SM2_R_INVALID_CURVE);
- return 0;
- }
- return 1;
-
- case EVP_PKEY_CTRL_MD:
- smctx->md = p2;
- return 1;
-
- case EVP_PKEY_CTRL_GET_MD:
- *(const EVP_MD **)p2 = smctx->md;
- return 1;
-
- case EVP_PKEY_CTRL_SET1_ID:
- if (p1 > 0) {
- tmp_id = OPENSSL_malloc(p1);
- if (tmp_id == NULL) {
- SM2err(SM2_F_PKEY_SM2_CTRL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- memcpy(tmp_id, p2, p1);
- OPENSSL_free(smctx->id);
- smctx->id = tmp_id;
- } else {
- /* set null-ID */
- OPENSSL_free(smctx->id);
- smctx->id = NULL;
- }
- smctx->id_len = (size_t)p1;
- smctx->id_set = 1;
- return 1;
-
- case EVP_PKEY_CTRL_GET1_ID:
- memcpy(p2, smctx->id, smctx->id_len);
- return 1;
-
- case EVP_PKEY_CTRL_GET1_ID_LEN:
- *(size_t *)p2 = smctx->id_len;
- return 1;
-
- case EVP_PKEY_CTRL_DIGESTINIT:
- /* nothing to be inited, this is to suppress the error... */
- return 1;
-
- default:
- return -2;
- }
-}
-
-static int pkey_sm2_ctrl_str(EVP_PKEY_CTX *ctx,
- const char *type, const char *value)
-{
- uint8_t *hex_id;
- long hex_len = 0;
- int ret = 0;
-
- if (strcmp(type, "ec_paramgen_curve") == 0) {
- int nid = NID_undef;
-
- if (((nid = EC_curve_nist2nid(value)) == NID_undef)
- && ((nid = OBJ_sn2nid(value)) == NID_undef)
- && ((nid = OBJ_ln2nid(value)) == NID_undef)) {
- SM2err(SM2_F_PKEY_SM2_CTRL_STR, SM2_R_INVALID_CURVE);
- return 0;
- }
- return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
- } else if (strcmp(type, "ec_param_enc") == 0) {
- int param_enc;
-
- if (strcmp(value, "explicit") == 0)
- param_enc = 0;
- else if (strcmp(value, "named_curve") == 0)
- param_enc = OPENSSL_EC_NAMED_CURVE;
- else
- return -2;
- return EVP_PKEY_CTX_set_ec_param_enc(ctx, param_enc);
- } else if (strcmp(type, "distid") == 0) {
- return pkey_sm2_ctrl(ctx, EVP_PKEY_CTRL_SET1_ID,
- (int)strlen(value), (void *)value);
- } else if (strcmp(type, "hexdistid") == 0) {
- hex_id = OPENSSL_hexstr2buf((const char *)value, &hex_len);
- if (hex_id == NULL) {
- SM2err(SM2_F_PKEY_SM2_CTRL_STR, ERR_R_PASSED_INVALID_ARGUMENT);
- return 0;
- }
- ret = pkey_sm2_ctrl(ctx, EVP_PKEY_CTRL_SET1_ID, (int)hex_len,
- (void *)hex_id);
- OPENSSL_free(hex_id);
- return ret;
- }
-
- return -2;
-}
-
-static int pkey_sm2_digest_custom(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
-{
- uint8_t z[EVP_MAX_MD_SIZE];
- SM2_PKEY_CTX *smctx = ctx->data;
- EC_KEY *ec = ctx->pkey->pkey.ec;
- const EVP_MD *md = EVP_MD_CTX_md(mctx);
- int mdlen = EVP_MD_size(md);
-
- if (!smctx->id_set) {
- /*
- * An ID value must be set. The specifications are not clear whether a
- * NULL is allowed. We only allow it if set explicitly for maximum
- * flexibility.
- */
- SM2err(SM2_F_PKEY_SM2_DIGEST_CUSTOM, SM2_R_ID_NOT_SET);
- return 0;
- }
-
- if (mdlen < 0) {
- SM2err(SM2_F_PKEY_SM2_DIGEST_CUSTOM, SM2_R_INVALID_DIGEST);
- return 0;
- }
-
- /* get hashed prefix 'z' of tbs message */
- if (!sm2_compute_z_digest(z, md, smctx->id, smctx->id_len, ec))
- return 0;
-
- return EVP_DigestUpdate(mctx, z, (size_t)mdlen);
-}
-
-static int pkey_sm2_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
-{
- EC_KEY *ec = NULL;
- int ret;
-
- ec = EC_KEY_new_by_curve_name(NID_sm2);
- if (ec == NULL)
- return 0;
- if (!ossl_assert(ret = EVP_PKEY_assign_EC_KEY(pkey, ec)))
- EC_KEY_free(ec);
- return ret;
-}
-
-static int pkey_sm2_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
-{
- EC_KEY *ec = NULL;
-
- ec = EC_KEY_new_by_curve_name(NID_sm2);
- if (ec == NULL)
- return 0;
- if (!ossl_assert(EVP_PKEY_assign_EC_KEY(pkey, ec))) {
- EC_KEY_free(ec);
- return 0;
- }
- /* Note: if error is returned, we count on caller to free pkey->pkey.ec */
- if (ctx->pkey != NULL
- && !EVP_PKEY_copy_parameters(pkey, ctx->pkey))
- return 0;
-
- return EC_KEY_generate_key(ec);
-}
-
-static const EVP_PKEY_METHOD sm2_pkey_meth = {
- EVP_PKEY_SM2,
- 0,
- pkey_sm2_init,
- pkey_sm2_copy,
- pkey_sm2_cleanup,
-
- 0,
- pkey_sm2_paramgen,
-
- 0,
- pkey_sm2_keygen,
-
- 0,
- pkey_sm2_sign,
-
- 0,
- pkey_sm2_verify,
-
- 0, 0,
-
- 0, 0, 0, 0,
-
- 0,
- pkey_sm2_encrypt,
-
- 0,
- pkey_sm2_decrypt,
-
- 0,
- 0,
- pkey_sm2_ctrl,
- pkey_sm2_ctrl_str,
-
- 0, 0,
-
- 0, 0, 0,
-
- pkey_sm2_digest_custom
-};
-
-const EVP_PKEY_METHOD *sm2_pkey_method(void)
-{
- return &sm2_pkey_meth;
-}
projects / thirdparty / openssl.git / commitdiff
