Move SM2 algos to SM2 specific PKEY method

Use EVP_PKEY_set_alias_type to access
Reviewed-by: NAndy Polyakov <appro@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6443)

crypto/asn1/standard_methods.h

@@ -54,5 +54,8 @@ static const EVP_PKEY_ASN1_METHOD *standard_methods[] = {
     &ed25519_asn1_meth,
     &ed448_asn1_meth,
 #endif
+#ifndef OPENSSL_NO_SM2
+    &sm2_asn1_meth,
+#endif
 };
 

crypto/ec/ec_ameth.c

@@ -602,6 +602,14 @@ const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = {
     ec_pkey_param_check
 };
 
+#if !defined(OPENSSL_NO_SM2)
+const EVP_PKEY_ASN1_METHOD sm2_asn1_meth = {
+   EVP_PKEY_SM2,
+   EVP_PKEY_EC,
+   ASN1_PKEY_ALIAS
+};
+#endif
+
 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
 {
     int private = EC_KEY_get0_private_key(x) != NULL;

crypto/ec/ec_err.c

@@ -259,6 +259,12 @@ static const ERR_STRING_DATA EC_str_functs[] = {
     {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_EC_KEYGEN, 0), "pkey_ec_keygen"},
     {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_EC_PARAMGEN, 0), "pkey_ec_paramgen"},
     {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_EC_SIGN, 0), "pkey_ec_sign"},
+    {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_SM2_CTRL, 0), "pkey_sm2_ctrl"},
+    {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_SM2_CTRL_STR, 0), "pkey_sm2_ctrl_str"},
+    {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_SM2_INIT, 0), "pkey_sm2_init"},
+    {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_SM2_KEYGEN, 0), "pkey_sm2_keygen"},
+    {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_SM2_PARAMGEN, 0), "pkey_sm2_paramgen"},
+    {ERR_PACK(ERR_LIB_EC, EC_F_PKEY_SM2_SIGN, 0), "pkey_sm2_sign"},
     {ERR_PACK(ERR_LIB_EC, EC_F_VALIDATE_ECX_DERIVE, 0), "validate_ecx_derive"},
     {0, NULL}
 };

crypto/ec/ec_pmeth.c

@@ -16,10 +16,6 @@
 #include <openssl/evp.h>
 #include "internal/evp_int.h"
 
-#if !defined(OPENSSL_NO_SM2)
-# include "internal/sm2.h"
-#endif
-
 /* EC pkey context structure */
 
 typedef struct {
@@ -107,7 +103,6 @@ static int pkey_ec_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
     unsigned int sltmp;
     EC_PKEY_CTX *dctx = ctx->data;
     EC_KEY *ec = ctx->pkey->pkey.ec;
-    const int ec_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 
     if (!sig) {
         *siglen = ECDSA_size(ec);
@@ -122,15 +117,7 @@ static int pkey_ec_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
     else
         type = NID_sha1;
 
-    if (ec_nid == NID_sm2) {
-#if defined(OPENSSL_NO_SM2)
-        return -1;
-#else
-        ret = sm2_sign(type, tbs, tbslen, sig, &sltmp, ec);
-#endif
-    } else {
-        ret = ECDSA_sign(type, tbs, tbslen, sig, &sltmp, ec);
-    }
+    ret = ECDSA_sign(type, tbs, tbslen, sig, &sltmp, ec);
 
     if (ret <= 0)
         return ret;
@@ -145,22 +132,13 @@ static int pkey_ec_verify(EVP_PKEY_CTX *ctx,
     int ret, type;
     EC_PKEY_CTX *dctx = ctx->data;
     EC_KEY *ec = ctx->pkey->pkey.ec;
-    const int ec_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 
     if (dctx->md)
         type = EVP_MD_type(dctx->md);
     else
         type = NID_sha1;
 
-    if (ec_nid == NID_sm2) {
-#if defined(OPENSSL_NO_SM2)
-        ret = -1;
-#else
-        ret = sm2_verify(type, tbs, tbslen, sig, siglen, ec);
-#endif
-    } else {
-        ret = ECDSA_verify(type, tbs, tbslen, sig, siglen, ec);
-    }
+    ret = ECDSA_verify(type, tbs, tbslen, sig, siglen, ec);
 
     return ret;
 }
@@ -202,86 +180,6 @@ static int pkey_ec_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
     return 1;
 }
 
-static int pkey_ecies_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;
-    const int ec_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
-
-    if (ec_nid == NID_sm2) {
-# if defined(OPENSSL_NO_SM2)
-        ret = -1;
-# else
-        int md_type;
-        EC_PKEY_CTX *dctx = ctx->data;
-
-        if (dctx->md)
-            md_type = EVP_MD_type(dctx->md);
-        else
-            md_type = NID_sm3;
-
-        if (out == NULL) {
-            if (!sm2_ciphertext_size(ec, EVP_get_digestbynid(md_type), inlen,
-                                     outlen))
-                ret = -1;
-            else
-                ret = 1;
-        }
-        else {
-            ret = sm2_encrypt(ec, EVP_get_digestbynid(md_type),
-                              in, inlen, out, outlen);
-        }
-# endif
-    } else {
-        /* standard ECIES not implemented */
-        ret = -1;
-    }
-
-    return ret;
-}
-
-static int pkey_ecies_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;
-    const int ec_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
-
-    if (ec_nid == NID_sm2) {
-# if defined(OPENSSL_NO_SM2)
-        ret = -1;
-# else
-        int md_type;
-        EC_PKEY_CTX *dctx = ctx->data;
-
-        if (dctx->md)
-            md_type = EVP_MD_type(dctx->md);
-        else
-            md_type = NID_sm3;
-
-        if (out == NULL) {
-            if (!sm2_plaintext_size(ec, EVP_get_digestbynid(md_type), inlen,
-                                    outlen))
-                ret = -1;
-            else
-                ret = 1;
-        }
-        else {
-            ret = sm2_decrypt(ec, EVP_get_digestbynid(md_type),
-                              in, inlen, out, outlen);
-        }
-# endif
-    } else {
-        /* standard ECIES not implemented */
-        ret = -1;
-    }
-
-    return ret;
-}
-
 static int pkey_ec_kdf_derive(EVP_PKEY_CTX *ctx,
                               unsigned char *key, size_t *keylen)
 {
@@ -420,8 +318,7 @@ static int pkey_ec_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
             EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
             EVP_MD_type((const EVP_MD *)p2) != NID_sha256 &&
             EVP_MD_type((const EVP_MD *)p2) != NID_sha384 &&
-            EVP_MD_type((const EVP_MD *)p2) != NID_sha512 &&
-            EVP_MD_type((const EVP_MD *)p2) != NID_sm3) {
+            EVP_MD_type((const EVP_MD *)p2) != NID_sha512) {
             ECerr(EC_F_PKEY_EC_CTRL, EC_R_INVALID_DIGEST_TYPE);
             return 0;
         }
@@ -552,10 +449,10 @@ const EVP_PKEY_METHOD ec_pkey_meth = {
     0, 0, 0, 0,
 
     0,
-    pkey_ecies_encrypt,
+    0,
 
     0,
-    pkey_ecies_decrypt,
+    0,
 
     0,
 #ifndef OPENSSL_NO_EC

crypto/err/openssl.txt

@@ -1068,6 +1068,10 @@ RSA_F_RSA_VERIFY:119:RSA_verify
 RSA_F_RSA_VERIFY_ASN1_OCTET_STRING:120:RSA_verify_ASN1_OCTET_STRING
 RSA_F_RSA_VERIFY_PKCS1_PSS_MGF1:126:RSA_verify_PKCS1_PSS_mgf1
 RSA_F_SETUP_TBUF:167:setup_tbuf
+SM2_F_PKEY_SM2_CTRL:109:pkey_sm2_ctrl
+SM2_F_PKEY_SM2_CTRL_STR:110:pkey_sm2_ctrl_str
+SM2_F_PKEY_SM2_INIT:111:pkey_sm2_init
+SM2_F_PKEY_SM2_SIGN:112:pkey_sm2_sign
 SM2_F_SM2_COMPUTE_MSG_HASH:100:sm2_compute_msg_hash
 SM2_F_SM2_COMPUTE_USERID_DIGEST:101:sm2_compute_userid_digest
 SM2_F_SM2_DECRYPT:102:sm2_decrypt
@@ -2528,10 +2532,13 @@ RSA_R_VALUE_MISSING:147:value missing
 RSA_R_WRONG_SIGNATURE_LENGTH:119:wrong signature length
 SM2_R_ASN1_ERROR:100:asn1 error
 SM2_R_BAD_SIGNATURE:101:bad signature
+SM2_R_BUFFER_TOO_SMALL:107:buffer too small
+SM2_R_INVALID_CURVE:108:invalid curve
 SM2_R_INVALID_DIGEST:102:invalid digest
 SM2_R_INVALID_DIGEST_TYPE:103:invalid digest type
 SM2_R_INVALID_ENCODING:104:invalid encoding
 SM2_R_INVALID_FIELD:105:invalid field
+SM2_R_NO_PARAMETERS_SET:109:no parameters set
 SM2_R_USER_ID_TOO_LARGE:106:user id too large
 SSL_R_APP_DATA_IN_HANDSHAKE:100:app data in handshake
 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT:272:\

crypto/evp/pmeth_lib.c

@@ -64,6 +64,9 @@ static const EVP_PKEY_METHOD *standard_methods[] = {
     &ed25519_pkey_meth,
     &ed448_pkey_meth,
 #endif
+#ifndef OPENSSL_NO_SM2
+    &sm2_pkey_meth,
+#endif
 };
 
 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,

crypto/include/internal/asn1_int.h

@@ -76,6 +76,7 @@ extern const EVP_PKEY_ASN1_METHOD ecx25519_asn1_meth;
 extern const EVP_PKEY_ASN1_METHOD ecx448_asn1_meth;
 extern const EVP_PKEY_ASN1_METHOD ed25519_asn1_meth;
 extern const EVP_PKEY_ASN1_METHOD ed448_asn1_meth;
+extern const EVP_PKEY_ASN1_METHOD sm2_asn1_meth;
 extern const EVP_PKEY_ASN1_METHOD poly1305_asn1_meth;
 
 extern const EVP_PKEY_ASN1_METHOD hmac_asn1_meth;

crypto/include/internal/evp_int.h

@@ -90,6 +90,7 @@ extern const EVP_PKEY_METHOD dh_pkey_meth;
 extern const EVP_PKEY_METHOD dhx_pkey_meth;
 extern const EVP_PKEY_METHOD dsa_pkey_meth;
 extern const EVP_PKEY_METHOD ec_pkey_meth;
+extern const EVP_PKEY_METHOD sm2_pkey_meth;
 extern const EVP_PKEY_METHOD ecx25519_pkey_meth;
 extern const EVP_PKEY_METHOD ecx448_pkey_meth;
 extern const EVP_PKEY_METHOD ed25519_pkey_meth;

crypto/include/internal/sm2.h

@@ -42,15 +42,15 @@ int sm2_do_verify(const EC_KEY *key,
                   const char *user_id, const uint8_t *msg, size_t msg_len);
 
 /*
- * SM2 signature generation. Assumes input is an SM3 digest
+ * SM2 signature generation.
  */
-int sm2_sign(int type, const unsigned char *dgst, int dgstlen,
+int sm2_sign(const unsigned char *dgst, int dgstlen,
              unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
 
 /*
- * SM2 signature verification. Assumes input is an SM3 digest
+ * SM2 signature verification.
  */
-int sm2_verify(int type, const unsigned char *dgst, int dgstlen,
+int sm2_verify(const unsigned char *dgst, int dgstlen,
                const unsigned char *sig, int siglen, EC_KEY *eckey);
 
 

crypto/include/internal/sm2err.h

@@ -23,6 +23,10 @@ int ERR_load_SM2_strings(void);
 /*
  * SM2 function codes.
  */
+#  define SM2_F_PKEY_SM2_CTRL                              109
+#  define SM2_F_PKEY_SM2_CTRL_STR                          110
+#  define SM2_F_PKEY_SM2_INIT                              111
+#  define SM2_F_PKEY_SM2_SIGN                              112
 #  define SM2_F_SM2_COMPUTE_MSG_HASH                       100
 #  define SM2_F_SM2_COMPUTE_USERID_DIGEST                  101
 #  define SM2_F_SM2_DECRYPT                                102
@@ -38,10 +42,13 @@ int ERR_load_SM2_strings(void);
  */
 #  define SM2_R_ASN1_ERROR                                 100
 #  define SM2_R_BAD_SIGNATURE                              101
+#  define SM2_R_BUFFER_TOO_SMALL                           107
+#  define SM2_R_INVALID_CURVE                              108
 #  define SM2_R_INVALID_DIGEST                             102
 #  define SM2_R_INVALID_DIGEST_TYPE                        103
 #  define SM2_R_INVALID_ENCODING                           104
 #  define SM2_R_INVALID_FIELD                              105
+#  define SM2_R_NO_PARAMETERS_SET                          109
 #  define SM2_R_USER_ID_TOO_LARGE                          106
 
 # endif

crypto/sm2/build.info

 LIBS=../../libcrypto
 SOURCE[../../libcrypto]=\
-        sm2_za.c sm2_sign.c sm2_crypt.c sm2_err.c
-
+        sm2_za.c sm2_sign.c sm2_crypt.c sm2_err.c sm2_pmeth.c
 
 

crypto/sm2/sm2_err.c

@@ -14,6 +14,10 @@
 #ifndef OPENSSL_NO_ERR
 
 static const ERR_STRING_DATA SM2_str_functs[] = {
+    {ERR_PACK(ERR_LIB_SM2, SM2_F_PKEY_SM2_CTRL, 0), "pkey_sm2_ctrl"},
+    {ERR_PACK(ERR_LIB_SM2, SM2_F_PKEY_SM2_CTRL_STR, 0), "pkey_sm2_ctrl_str"},
+    {ERR_PACK(ERR_LIB_SM2, SM2_F_PKEY_SM2_INIT, 0), "pkey_sm2_init"},
+    {ERR_PACK(ERR_LIB_SM2, SM2_F_PKEY_SM2_SIGN, 0), "pkey_sm2_sign"},
     {ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_COMPUTE_MSG_HASH, 0),
      "sm2_compute_msg_hash"},
     {ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_COMPUTE_USERID_DIGEST, 0),
@@ -31,11 +35,14 @@ static const ERR_STRING_DATA SM2_str_functs[] = {
 static const ERR_STRING_DATA SM2_str_reasons[] = {
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_ASN1_ERROR), "asn1 error"},
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_BAD_SIGNATURE), "bad signature"},
+    {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_BUFFER_TOO_SMALL), "buffer too small"},
+    {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_INVALID_CURVE), "invalid curve"},
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_INVALID_DIGEST), "invalid digest"},
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_INVALID_DIGEST_TYPE),
     "invalid digest type"},
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_INVALID_ENCODING), "invalid encoding"},
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_INVALID_FIELD), "invalid field"},
+    {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_NO_PARAMETERS_SET), "no parameters set"},
     {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_USER_ID_TOO_LARGE), "user id too large"},
     {0, NULL}
 };

crypto/sm2/sm2_pmeth.c

+/*
+ * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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
+ */
+
+#include "internal/cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/ec.h>
+#include <openssl/evp.h>
+#include "internal/evp_int.h"
+#include "internal/sm2.h"
+#include "internal/sm2err.h"
+
+/* EC pkey context structure */
+
+typedef struct {
+    /* Key and paramgen group */
+    EC_GROUP *gen_group;
+    /* message digest */
+    const EVP_MD *md;
+} SM2_PKEY_CTX;
+
+static int pkey_sm2_init(EVP_PKEY_CTX *ctx)
+{
+    SM2_PKEY_CTX *dctx;
+
+    if ((dctx = OPENSSL_zalloc(sizeof(*dctx))) == NULL) {
+        SM2err(SM2_F_PKEY_SM2_INIT, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    ctx->data = dctx;
+    return 1;
+}
+
+static void pkey_sm2_cleanup(EVP_PKEY_CTX *ctx)
+{
+    SM2_PKEY_CTX *dctx = ctx->data;
+
+    if (dctx != NULL) {
+        EC_GROUP_free(dctx->gen_group);
+        OPENSSL_free(dctx);
+        ctx->data = NULL;
+    }
+}
+
+static int pkey_sm2_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+{
+    SM2_PKEY_CTX *dctx, *sctx;
+
+    if (!pkey_sm2_init(dst))
+        return 0;
+    sctx = src->data;
+    dctx = dst->data;
+    if (sctx->gen_group != NULL) {
+        dctx->gen_group = EC_GROUP_dup(sctx->gen_group);
+        if (dctx->gen_group == NULL) {
+            pkey_sm2_cleanup(dst);
+            return 0;
+        }
+    }
+    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_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_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)
+{
+    EC_KEY *ec = ctx->pkey->pkey.ec;
+    SM2_PKEY_CTX *dctx = ctx->data;
+    const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;
+
+    if (out == NULL) {
+        if (!sm2_ciphertext_size(ec, md, inlen, outlen))
+            return -1;
+        else
+            return 1;
+    }
+
+    return sm2_encrypt(ec, md, in, inlen, out, outlen);
+}
+
+static int pkey_sm2_decrypt(EVP_PKEY_CTX *ctx,
+                            unsigned char *out, size_t *outlen,
+                            const unsigned char *in, size_t inlen)
+{
+    EC_KEY *ec = ctx->pkey->pkey.ec;
+    SM2_PKEY_CTX *dctx = ctx->data;
+    const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;
+
+    if (out == NULL) {
+        if (!sm2_plaintext_size(ec, md, inlen, outlen))
+            return -1;
+        else
+            return 1;
+    }
+
+    return sm2_decrypt(ec, md, in, inlen, out, outlen);
+}
+
+static int pkey_sm2_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
+{
+    SM2_PKEY_CTX *dctx = ctx->data;
+    EC_GROUP *group;
+
+    switch (type) {
+    case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
+        group = EC_GROUP_new_by_curve_name(p1);
+        if (group == NULL) {
+            SM2err(SM2_F_PKEY_SM2_CTRL, SM2_R_INVALID_CURVE);
+            return 0;
+        }
+        EC_GROUP_free(dctx->gen_group);
+        dctx->gen_group = group;
+        return 1;
+
+    case EVP_PKEY_CTRL_EC_PARAM_ENC:
+        if (dctx->gen_group == NULL) {
+            SM2err(SM2_F_PKEY_SM2_CTRL, SM2_R_NO_PARAMETERS_SET);
+            return 0;
+        }
+        EC_GROUP_set_asn1_flag(dctx->gen_group, p1);
+        return 1;
+
+    case EVP_PKEY_CTRL_MD:
+        dctx->md = p2;
+        return 1;
+
+    case EVP_PKEY_CTRL_GET_MD:
+        *(const EVP_MD **)p2 = dctx->md;
+        return 1;
+
+    default:
+        return -2;
+
+    }
+}
+
+static int pkey_sm2_ctrl_str(EVP_PKEY_CTX *ctx,
+                             const char *type, const char *value)
+{
+    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);
+    }
+
+    return -2;
+}
+
+const EVP_PKEY_METHOD sm2_pkey_meth = {
+    EVP_PKEY_SM2,
+    0,
+    pkey_sm2_init,
+    pkey_sm2_copy,
+    pkey_sm2_cleanup,
+
+    0,
+    0,
+
+    0,
+    0,
+
+    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
+};

crypto/sm2/sm2_sign.c

@@ -282,7 +282,7 @@ int sm2_do_verify(const EC_KEY *key,
     return ret;
 }
 
-int sm2_sign(int type, const unsigned char *dgst, int dgstlen,
+int sm2_sign(const unsigned char *dgst, int dgstlen,
              unsigned char *sig, unsigned int *siglen, EC_KEY *eckey)
 {
     BIGNUM *e = NULL;
@@ -290,11 +290,6 @@ int sm2_sign(int type, const unsigned char *dgst, int dgstlen,
     int sigleni;
     int ret = -1;
 
-    if (type != NID_sm3 || dgstlen != 32) {
-       SM2err(SM2_F_SM2_SIGN, SM2_R_INVALID_DIGEST_TYPE);
-       goto done;
-   }
-
     e = BN_bin2bn(dgst, dgstlen, NULL);
     if (e == NULL) {
        SM2err(SM2_F_SM2_SIGN, ERR_R_BN_LIB);
@@ -318,7 +313,7 @@ int sm2_sign(int type, const unsigned char *dgst, int dgstlen,
     return ret;
 }
 
-int sm2_verify(int type, const unsigned char *dgst, int dgstlen,
+int sm2_verify(const unsigned char *dgst, int dgstlen,
                const unsigned char *sig, int sig_len, EC_KEY *eckey)
 {
     ECDSA_SIG *s = NULL;
@@ -328,11 +323,6 @@ int sm2_verify(int type, const unsigned char *dgst, int dgstlen,
     int derlen = -1;
     int ret = -1;
 
-    if (type != NID_sm3) {
-       SM2err(SM2_F_SM2_VERIFY, SM2_R_INVALID_DIGEST_TYPE);
-       goto done;
-   }
-
     s = ECDSA_SIG_new();
     if (s == NULL) {
         SM2err(SM2_F_SM2_VERIFY, ERR_R_MALLOC_FAILURE);

include/openssl/ecerr.h

@@ -182,6 +182,12 @@ int ERR_load_EC_strings(void);
 #  define EC_F_PKEY_EC_KEYGEN                              199
 #  define EC_F_PKEY_EC_PARAMGEN                            219
 #  define EC_F_PKEY_EC_SIGN                                218
+#  define EC_F_PKEY_SM2_CTRL                               284
+#  define EC_F_PKEY_SM2_CTRL_STR                           285
+#  define EC_F_PKEY_SM2_INIT                               287
+#  define EC_F_PKEY_SM2_KEYGEN                             288
+#  define EC_F_PKEY_SM2_PARAMGEN                           289
+#  define EC_F_PKEY_SM2_SIGN                               290
 #  define EC_F_VALIDATE_ECX_DERIVE                         278
 
 /*

test/evp_extra_test.c

@@ -477,6 +477,127 @@ static int test_EVP_PKCS82PKEY(void)
 }
 #endif
 
+#ifndef OPENSSL_NO_SM2
+
+static int test_EVP_SM2(void)
+{
+    int ret = 0;
+    EVP_PKEY *pkey = NULL;
+    EVP_PKEY *params = NULL;
+    EVP_PKEY_CTX *pctx = NULL;
+    EVP_PKEY_CTX *kctx = NULL;
+    size_t sig_len = 0;
+    unsigned char *sig = NULL;
+    EVP_MD_CTX *md_ctx = NULL;
+    EVP_MD_CTX *md_ctx_verify = NULL;
+    EVP_PKEY_CTX *cctx = NULL;
+
+    uint8_t ciphertext[128];
+    size_t ctext_len = sizeof(ciphertext);
+
+    uint8_t plaintext[8];
+    size_t ptext_len = sizeof(plaintext);
+
+    pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
+    if (!TEST_ptr(pctx))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_paramgen_init(pctx) == 1))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, NID_sm2)))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_paramgen(pctx, &params)))
+        goto done;
+
+    kctx = EVP_PKEY_CTX_new(params, NULL);
+    if (!TEST_ptr(kctx))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_keygen_init(kctx)))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_keygen(kctx, &pkey)))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2)))
+        goto done;
+
+    if (!TEST_ptr(md_ctx = EVP_MD_CTX_new()))
+        goto done;
+
+    if (!TEST_ptr(md_ctx_verify = EVP_MD_CTX_new()))
+        goto done;
+
+    if (!TEST_true(EVP_DigestSignInit(md_ctx, NULL, EVP_sm3(), NULL, pkey)))
+        goto done;
+
+    if(!TEST_true(EVP_DigestSignUpdate(md_ctx, kMsg, sizeof(kMsg))))
+        goto done;
+
+    /* Determine the size of the signature. */
+    if (!TEST_true(EVP_DigestSignFinal(md_ctx, NULL, &sig_len)))
+        goto done;
+
+    if (!TEST_size_t_eq(sig_len, (size_t)EVP_PKEY_size(pkey)))
+        goto done;
+
+    if (!TEST_ptr(sig = OPENSSL_malloc(sig_len)))
+        goto done;
+
+    if (!TEST_true(EVP_DigestSignFinal(md_ctx, sig, &sig_len)))
+        goto done;
+
+    /* Ensure that the signature round-trips. */
+
+    if (!TEST_true(EVP_DigestVerifyInit(md_ctx_verify, NULL, EVP_sm3(), NULL, pkey)))
+        goto done;
+
+    if (!TEST_true(EVP_DigestVerifyUpdate(md_ctx_verify, kMsg, sizeof(kMsg))))
+        goto done;
+
+    if (!TEST_true(EVP_DigestVerifyFinal(md_ctx_verify, sig, sig_len)))
+        goto done;
+
+    /* now check encryption/decryption */
+
+    if (!TEST_ptr(cctx = EVP_PKEY_CTX_new(pkey, NULL)))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_encrypt_init(cctx)))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_encrypt(cctx, ciphertext, &ctext_len, kMsg, sizeof(kMsg))))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_decrypt_init(cctx)))
+        goto done;
+
+    if (!TEST_true(EVP_PKEY_decrypt(cctx, plaintext, &ptext_len, ciphertext, ctext_len)))
+        goto done;
+
+    if (!TEST_true(ptext_len == sizeof(kMsg)))
+        goto done;
+
+    if (!TEST_true(memcmp(plaintext, kMsg, sizeof(kMsg)) == 0))
+        goto done;
+
+    ret = 1;
+done:
+    EVP_PKEY_CTX_free(pctx);
+    EVP_PKEY_CTX_free(kctx);
+    EVP_PKEY_CTX_free(cctx);
+    EVP_PKEY_free(pkey);
+    EVP_PKEY_free(params);
+    EVP_MD_CTX_free(md_ctx);
+    EVP_MD_CTX_free(md_ctx_verify);
+    OPENSSL_free(sig);
+    return ret;
+}
+
+#endif
+
 static struct keys_st {
     int type;
     char *priv;
@@ -663,6 +784,9 @@ int setup_tests(void)
     ADD_ALL_TESTS(test_d2i_AutoPrivateKey, OSSL_NELEM(keydata));
 #ifndef OPENSSL_NO_EC
     ADD_TEST(test_EVP_PKCS82PKEY);
+#endif
+#ifndef OPENSSL_NO_SM2
+    ADD_TEST(test_EVP_SM2);
 #endif
     ADD_ALL_TESTS(test_set_get_raw_keys, OSSL_NELEM(keys));
     custom_pmeth = EVP_PKEY_meth_new(0xdefaced, 0);

test/evp_test.c

@@ -2530,6 +2530,11 @@ top:
         if (!TEST_ptr(key = OPENSSL_malloc(sizeof(*key))))
             return 0;
         key->name = take_value(pp);
+
+        /* Hack to detect SM2 keys */
+        if(strstr(key->name, "SM2"))
+            EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2);
+
         key->key = pkey;
         key->next = *klist;
         *klist = key;

test/recipes/30-test_evp_data/evppkey.txt

@@ -18384,6 +18384,16 @@ Ctrl = digest:SM3
 Input = D7AD397F6FFA5D4F7F11E7217F241607DC30618C236D2C09C1B9EA8FDADEE2E8
 Output = 3046022100AB1DB64DE7C40EDBDE6651C9B8EBDB804673DB836E5D5C7FE15DCF9ED2725037022100EBA714451FF69B0BB930B379E192E7CD5FA6E3C41C7FBD8303B799AB54A54621
 
+Verify = SM2_key1
+Ctrl = digest:SM3
+Input = B1139602C6ECC9E15E2F3F9C635A1AFE737058BC15387479C1EA0D0B3D90E9E5
+Output = 3045022100E6E0414EBD3A656C35602AF14AB20287DBF30D57AF75C49A188ED4B42391F22402202F54F277C606F4605E1CE9514947FFDDF94C67A539804A4ED17F852288BDBE2E
+
+Verify = SM2_key1
+Ctrl = digest:SHA512
+Input = 40AA1B203C9D8EE150B21C3C7CDA8261492E5420C5F2B9F7380700E094C303B48E62F319C1DA0E32EB40D113C5F1749CC61AEB499167890AB82F2CC9BB706971
+Output = 3046022100AE018933B9BA041784380069F2DDF609694DCD299FDBF23D09F4B711FBC103EC0221008440BB1A48C132DE4FB91BE9F43B958142FDD29FB9DABE01B17514023A2F638C
+
 Decrypt = SM2_key1
 Input = 30818A0220466BE2EF5C11782EC77864A0055417F407A5AFC11D653C6BCE69E417BB1D05B6022062B572E21FF0DDF5C726BD3F9FF2EAE56E6294713A607E9B9525628965F62CC804203C1B5713B5DB2728EB7BF775E44F4689FC32668BDC564F52EA45B09E8DF2A5F40422084A9D0CC2997092B7D3C404FCE95956EB604D732B2307A8E5B8900ED6608CA5B197
 Output = "The floofy bunnies hop at midnight"