Enable curve-spefific ECDSA implementations via EC_METHOD

which are already enabled for ECDH.

Signed-off-by: Patrick Steuer <patrick.steuer@de.ibm.com>

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9348)

12 files changed, 118 insertions, 36 deletions

diff --git a/crypto/ec/ec2_smpl.c b/crypto/ec/ec2_smpl.c
index 0cc9c893f8..f377b1f11e 100644
--- a/crypto/ec/ec2_smpl.c
+++ b/crypto/ec/ec2_smpl.c
@@ -984,6 +984,9 @@ const EC_METHOD *EC_GF2m_simple_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         0, /* field_inverse_mod_ord */
         0, /* blind_coordinates */
         ec_GF2m_simple_ladder_pre,
diff --git a/crypto/ec/ec_lcl.h b/crypto/ec/ec_lcl.h
index b6442328bf..5dd4d0318c 100644
--- a/crypto/ec/ec_lcl.h
+++ b/crypto/ec/ec_lcl.h
@@ -179,6 +179,14 @@ struct ec_method_st {
     /* custom ECDH operation */
     int (*ecdh_compute_key)(unsigned char **pout, size_t *poutlen,
                             const EC_POINT *pub_key, const EC_KEY *ecdh);
+    /* custom ECDSA */
+    int (*ecdsa_sign_setup)(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinvp,
+                            BIGNUM **rp);
+    ECDSA_SIG *(*ecdsa_sign_sig)(const unsigned char *dgst, int dgstlen,
+                                 const BIGNUM *kinv, const BIGNUM *r,
+                                 EC_KEY *eckey);
+    int (*ecdsa_verify_sig)(const unsigned char *dgst, int dgstlen,
+                            const ECDSA_SIG *sig, EC_KEY *eckey);
     /* Inverse modulo order */
     int (*field_inverse_mod_ord)(const EC_GROUP *, BIGNUM *r,
                                  const BIGNUM *x, BN_CTX *);
@@ -660,6 +668,13 @@ int ossl_ecdsa_verify(int type, const unsigned char *dgst, int dgst_len,
                       const unsigned char *sigbuf, int sig_len, EC_KEY *eckey);
 int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len,
                           const ECDSA_SIG *sig, EC_KEY *eckey);
+int ecdsa_simple_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
+                            BIGNUM **rp);
+ECDSA_SIG *ecdsa_simple_sign_sig(const unsigned char *dgst, int dgst_len,
+                                 const BIGNUM *in_kinv, const BIGNUM *in_r,
+                                 EC_KEY *eckey);
+int ecdsa_simple_verify_sig(const unsigned char *dgst, int dgst_len,
+                            const ECDSA_SIG *sig, EC_KEY *eckey);
 
 int ED25519_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len,
                  const uint8_t public_key[32], const uint8_t private_key[32]);
diff --git a/crypto/ec/ecdsa_ossl.c b/crypto/ec/ecdsa_ossl.c
index 86bdc87721..afa65233be 100644
--- a/crypto/ec/ecdsa_ossl.c
+++ b/crypto/ec/ecdsa_ossl.c
@@ -14,6 +14,41 @@
 #include "internal/bn_int.h"
 #include "ec_lcl.h"
 
+int ossl_ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
+                          BIGNUM **rp)
+{
+    if (eckey->group->meth->ecdsa_sign_setup == NULL) {
+        ECerr(EC_F_OSSL_ECDSA_SIGN_SETUP, EC_R_CURVE_DOES_NOT_SUPPORT_ECDSA);
+        return 0;
+    }
+
+    return eckey->group->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp);
+}
+
+ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
+                               const BIGNUM *in_kinv, const BIGNUM *in_r,
+                               EC_KEY *eckey)
+{
+    if (eckey->group->meth->ecdsa_sign_sig == NULL) {
+        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, EC_R_CURVE_DOES_NOT_SUPPORT_ECDSA);
+        return NULL;
+    }
+
+    return eckey->group->meth->ecdsa_sign_sig(dgst, dgst_len,
+                                              in_kinv, in_r, eckey);
+}
+
+int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len,
+                          const ECDSA_SIG *sig, EC_KEY *eckey)
+{
+    if (eckey->group->meth->ecdsa_verify_sig == NULL) {
+        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, EC_R_CURVE_DOES_NOT_SUPPORT_ECDSA);
+        return 0;
+    }
+
+    return eckey->group->meth->ecdsa_verify_sig(dgst, dgst_len, sig, eckey);
+}
+
 int ossl_ecdsa_sign(int type, const unsigned char *dgst, int dlen,
                     unsigned char *sig, unsigned int *siglen,
                     const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey)
@@ -145,15 +180,15 @@ static int ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in,
     return ret;
 }
 
-int ossl_ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
-                          BIGNUM **rp)
+int ecdsa_simple_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
+                            BIGNUM **rp)
 {
     return ecdsa_sign_setup(eckey, ctx_in, kinvp, rp, NULL, 0);
 }
 
-ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
-                               const BIGNUM *in_kinv, const BIGNUM *in_r,
-                               EC_KEY *eckey)
+ECDSA_SIG *ecdsa_simple_sign_sig(const unsigned char *dgst, int dgst_len,
+                                 const BIGNUM *in_kinv, const BIGNUM *in_r,
+                                 EC_KEY *eckey)
 {
     int ok = 0, i;
     BIGNUM *kinv = NULL, *s, *m = NULL;
@@ -167,35 +202,35 @@ ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
     priv_key = EC_KEY_get0_private_key(eckey);
 
     if (group == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_PASSED_NULL_PARAMETER);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_PASSED_NULL_PARAMETER);
         return NULL;
     }
     if (priv_key == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, EC_R_MISSING_PRIVATE_KEY);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, EC_R_MISSING_PRIVATE_KEY);
         return NULL;
     }
 
     if (!EC_KEY_can_sign(eckey)) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, EC_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, EC_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
         return NULL;
     }
 
     ret = ECDSA_SIG_new();
     if (ret == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_MALLOC_FAILURE);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_MALLOC_FAILURE);
         return NULL;
     }
     ret->r = BN_new();
     ret->s = BN_new();
     if (ret->r == NULL || ret->s == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_MALLOC_FAILURE);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_MALLOC_FAILURE);
         goto err;
     }
     s = ret->s;
 
     if ((ctx = BN_CTX_new_ex(eckey->libctx)) == NULL
         || (m = BN_new()) == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_MALLOC_FAILURE);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_MALLOC_FAILURE);
         goto err;
     }
 
@@ -207,25 +242,25 @@ ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
     if (8 * dgst_len > i)
         dgst_len = (i + 7) / 8;
     if (!BN_bin2bn(dgst, dgst_len, m)) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_BN_LIB);
         goto err;
     }
     /* If still too long, truncate remaining bits with a shift */
     if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7))) {
-        ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_BN_LIB);
         goto err;
     }
     do {
         if (in_kinv == NULL || in_r == NULL) {
             if (!ecdsa_sign_setup(eckey, ctx, &kinv, &ret->r, dgst, dgst_len)) {
-                ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_ECDSA_LIB);
+                ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_ECDSA_LIB);
                 goto err;
             }
             ckinv = kinv;
         } else {
             ckinv = in_kinv;
             if (BN_copy(ret->r, in_r) == NULL) {
-                ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_MALLOC_FAILURE);
+                ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_MALLOC_FAILURE);
                 goto err;
             }
         }
@@ -239,11 +274,11 @@ ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
          */
         if (!bn_to_mont_fixed_top(s, ret->r, group->mont_data, ctx)
             || !bn_mul_mont_fixed_top(s, s, priv_key, group->mont_data, ctx)) {
-            ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_BN_LIB);
+            ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_BN_LIB);
             goto err;
         }
         if (!bn_mod_add_fixed_top(s, s, m, order)) {
-            ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_BN_LIB);
+            ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_BN_LIB);
             goto err;
         }
         /*
@@ -252,7 +287,7 @@ ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
          */
         if (!bn_to_mont_fixed_top(s, s, group->mont_data, ctx)
             || !BN_mod_mul_montgomery(s, s, ckinv, group->mont_data, ctx)) {
-            ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, ERR_R_BN_LIB);
+            ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, ERR_R_BN_LIB);
             goto err;
         }
 
@@ -262,7 +297,7 @@ ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
              * generate new kinv and r values
              */
             if (in_kinv != NULL && in_r != NULL) {
-                ECerr(EC_F_OSSL_ECDSA_SIGN_SIG, EC_R_NEED_NEW_SETUP_VALUES);
+                ECerr(EC_F_ECDSA_SIMPLE_SIGN_SIG, EC_R_NEED_NEW_SETUP_VALUES);
                 goto err;
             }
         } else {
@@ -314,8 +349,8 @@ int ossl_ecdsa_verify(int type, const unsigned char *dgst, int dgst_len,
     return ret;
 }
 
-int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len,
-                          const ECDSA_SIG *sig, EC_KEY *eckey)
+int ecdsa_simple_verify_sig(const unsigned char *dgst, int dgst_len,
+                            const ECDSA_SIG *sig, EC_KEY *eckey)
 {
     int ret = -1, i;
     BN_CTX *ctx;
@@ -328,18 +363,18 @@ int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len,
     /* check input values */
     if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL ||
         (pub_key = EC_KEY_get0_public_key(eckey)) == NULL || sig == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, EC_R_MISSING_PARAMETERS);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, EC_R_MISSING_PARAMETERS);
         return -1;
     }
 
     if (!EC_KEY_can_sign(eckey)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, EC_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, EC_R_CURVE_DOES_NOT_SUPPORT_SIGNING);
         return -1;
     }
 
     ctx = BN_CTX_new_ex(eckey->libctx);
     if (ctx == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_MALLOC_FAILURE);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_MALLOC_FAILURE);
         return -1;
     }
     BN_CTX_start(ctx);
@@ -348,26 +383,26 @@ int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len,
     m = BN_CTX_get(ctx);
     X = BN_CTX_get(ctx);
     if (X == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
 
     order = EC_GROUP_get0_order(group);
     if (order == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_EC_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_EC_LIB);
         goto err;
     }
 
     if (BN_is_zero(sig->r) || BN_is_negative(sig->r) ||
         BN_ucmp(sig->r, order) >= 0 || BN_is_zero(sig->s) ||
         BN_is_negative(sig->s) || BN_ucmp(sig->s, order) >= 0) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, EC_R_BAD_SIGNATURE);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, EC_R_BAD_SIGNATURE);
         ret = 0;                /* signature is invalid */
         goto err;
     }
     /* calculate tmp1 = inv(S) mod order */
     if (!ec_group_do_inverse_ord(group, u2, sig->s, ctx)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
     /* digest -> m */
@@ -378,41 +413,41 @@ int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len,
     if (8 * dgst_len > i)
         dgst_len = (i + 7) / 8;
     if (!BN_bin2bn(dgst, dgst_len, m)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
     /* If still too long truncate remaining bits with a shift */
     if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7))) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
     /* u1 = m * tmp mod order */
     if (!BN_mod_mul(u1, m, u2, order, ctx)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
     /* u2 = r * w mod q */
     if (!BN_mod_mul(u2, sig->r, u2, order, ctx)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
 
     if ((point = EC_POINT_new(group)) == NULL) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_MALLOC_FAILURE);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_MALLOC_FAILURE);
         goto err;
     }
     if (!EC_POINT_mul(group, point, u1, pub_key, u2, ctx)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_EC_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_EC_LIB);
         goto err;
     }
 
     if (!EC_POINT_get_affine_coordinates(group, point, X, NULL, ctx)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_EC_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_EC_LIB);
         goto err;
     }
 
     if (!BN_nnmod(u1, X, order, ctx)) {
-        ECerr(EC_F_OSSL_ECDSA_VERIFY_SIG, ERR_R_BN_LIB);
+        ECerr(EC_F_ECDSA_SIMPLE_VERIFY_SIG, ERR_R_BN_LIB);
         goto err;
     }
     /*  if the signature is correct u1 is equal to sig->r */
diff --git a/crypto/ec/ecp_mont.c b/crypto/ec/ecp_mont.c
index 308b30629d..61a203c178 100644
--- a/crypto/ec/ecp_mont.c
+++ b/crypto/ec/ecp_mont.c
@@ -63,6 +63,9 @@ const EC_METHOD *EC_GFp_mont_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         0, /* field_inverse_mod_ord */
         ec_GFp_simple_blind_coordinates,
         ec_GFp_simple_ladder_pre,
diff --git a/crypto/ec/ecp_nist.c b/crypto/ec/ecp_nist.c
index 13249b52de..99cc74b66d 100644
--- a/crypto/ec/ecp_nist.c
+++ b/crypto/ec/ecp_nist.c
@@ -65,6 +65,9 @@ const EC_METHOD *EC_GFp_nist_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         0, /* field_inverse_mod_ord */
         ec_GFp_simple_blind_coordinates,
         ec_GFp_simple_ladder_pre,
diff --git a/crypto/ec/ecp_nistp224.c b/crypto/ec/ecp_nistp224.c
index 2ad9903c90..89ea039b2c 100644
--- a/crypto/ec/ecp_nistp224.c
+++ b/crypto/ec/ecp_nistp224.c
@@ -291,6 +291,9 @@ const EC_METHOD *EC_GFp_nistp224_method(void)
         ec_key_simple_generate_public_key,
         0, /* keycopy */
         0, /* keyfinish */
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         ecdh_simple_compute_key,
         0, /* field_inverse_mod_ord */
         0, /* blind_coordinates */
diff --git a/crypto/ec/ecp_nistp256.c b/crypto/ec/ecp_nistp256.c
index 624ee1621f..3cc5a833a4 100644
--- a/crypto/ec/ecp_nistp256.c
+++ b/crypto/ec/ecp_nistp256.c
@@ -1823,6 +1823,9 @@ const EC_METHOD *EC_GFp_nistp256_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         0, /* field_inverse_mod_ord */
         0, /* blind_coordinates */
         0, /* ladder_pre */
diff --git a/crypto/ec/ecp_nistp521.c b/crypto/ec/ecp_nistp521.c
index 6de37f663b..29b943598d 100644
--- a/crypto/ec/ecp_nistp521.c
+++ b/crypto/ec/ecp_nistp521.c
@@ -1665,6 +1665,9 @@ const EC_METHOD *EC_GFp_nistp521_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         0, /* field_inverse_mod_ord */
         0, /* blind_coordinates */
         0, /* ladder_pre */
diff --git a/crypto/ec/ecp_nistz256.c b/crypto/ec/ecp_nistz256.c
index df1724c385..a09e9c5d99 100644
--- a/crypto/ec/ecp_nistz256.c
+++ b/crypto/ec/ecp_nistz256.c
@@ -1689,6 +1689,9 @@ const EC_METHOD *EC_GFp_nistz256_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         ecp_nistz256_inv_mod_ord,                   /* can be #define-d NULL */
         0,                                          /* blind_coordinates */
         0,                                          /* ladder_pre */
diff --git a/crypto/ec/ecp_s390x_nistp.c b/crypto/ec/ecp_s390x_nistp.c
index 61b0a32603..0b03d7fd04 100644
--- a/crypto/ec/ecp_s390x_nistp.c
+++ b/crypto/ec/ecp_s390x_nistp.c
@@ -175,6 +175,9 @@ const EC_METHOD *EC_GFp_s390x_nistp##bits##_method(void)                \
         NULL, /* keycopy */                                             \
         NULL, /* keyfinish */                                           \
         ecdh_simple_compute_key,                                        \
+        ecdsa_simple_sign_setup,                                        \
+        ecdsa_simple_sign_sig,                                          \
+        ecdsa_simple_verify_sig,                                        \
         NULL, /* field_inverse_mod_ord */                               \
         ec_GFp_simple_blind_coordinates,                                \
         ec_GFp_simple_ladder_pre,                                       \
diff --git a/crypto/ec/ecp_smpl.c b/crypto/ec/ecp_smpl.c
index e8295e636a..bf7aeb1017 100644
--- a/crypto/ec/ecp_smpl.c
+++ b/crypto/ec/ecp_smpl.c
@@ -64,6 +64,9 @@ const EC_METHOD *EC_GFp_simple_method(void)
         0, /* keycopy */
         0, /* keyfinish */
         ecdh_simple_compute_key,
+        ecdsa_simple_sign_setup,
+        ecdsa_simple_sign_sig,
+        ecdsa_simple_verify_sig,
         0, /* field_inverse_mod_ord */
         ec_GFp_simple_blind_coordinates,
         ec_GFp_simple_ladder_pre,
diff --git a/crypto/err/openssl.txt b/crypto/err/openssl.txt
index 61ad994a8d..035bd729f3 100644
--- a/crypto/err/openssl.txt
+++ b/crypto/err/openssl.txt
@@ -551,6 +551,9 @@ EC_F_ECDSA_SIGN_EX:254:ECDSA_sign_ex
 EC_F_ECDSA_SIGN_SETUP:248:ECDSA_sign_setup
 EC_F_ECDSA_SIG_NEW:265:ECDSA_SIG_new
 EC_F_ECDSA_VERIFY:253:ECDSA_verify
+EC_F_ECDSA_SIMPLE_SIGN_SETUP:310:ecdsa_simple_sign_setup
+EC_F_ECDSA_SIMPLE_SIGN_SIG:311:ecdsa_simple_sign_sig
+EC_F_ECDSA_SIMPLE_VERIFY_SIG:312:ecdsa_simple_verify_sig
 EC_F_ECD_ITEM_VERIFY:270:ecd_item_verify
 EC_F_ECKEY_PARAM2TYPE:223:eckey_param2type
 EC_F_ECKEY_PARAM_DECODE:212:eckey_param_decode
@@ -716,6 +719,7 @@ EC_F_NISTP521_PRE_COMP_NEW:237:nistp521_pre_comp_new
 EC_F_O2I_ECPUBLICKEY:152:o2i_ECPublicKey
 EC_F_OLD_EC_PRIV_DECODE:222:old_ec_priv_decode
 EC_F_OSSL_ECDH_COMPUTE_KEY:247:ossl_ecdh_compute_key
+EC_F_OSSL_ECDSA_SIGN_SETUP:300:ossl_ecdsa_sign_setup
 EC_F_OSSL_ECDSA_SIGN_SIG:249:ossl_ecdsa_sign_sig
 EC_F_OSSL_ECDSA_VERIFY_SIG:250:ossl_ecdsa_verify_sig
 EC_F_PKEY_ECD_CTRL:271:pkey_ecd_ctrl
@@ -2327,6 +2331,7 @@ EC_R_BUFFER_TOO_SMALL:100:buffer too small
 EC_R_CANNOT_INVERT:165:cannot invert
 EC_R_COORDINATES_OUT_OF_RANGE:146:coordinates out of range
 EC_R_CURVE_DOES_NOT_SUPPORT_ECDH:160:curve does not support ecdh
+EC_R_CURVE_DOES_NOT_SUPPORT_ECDSA:170:curve does not support ecdsa
 EC_R_CURVE_DOES_NOT_SUPPORT_SIGNING:159:curve does not support signing
 EC_R_D2I_ECPKPARAMETERS_FAILURE:117:d2i ecpkparameters failure
 EC_R_DECODE_ERROR:142:decode error