+
+static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
+ unsigned char *out, size_t *poutlen,
+ unsigned char *in, size_t inlen)
+ {
+ int rv = 0;
+ switch(pkey_op)
+ {
+ case EVP_PKEY_OP_VERIFYRECOVER:
+ rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
+ break;
+
+ case EVP_PKEY_OP_SIGN:
+ rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
+ break;
+
+ case EVP_PKEY_OP_ENCRYPT:
+ rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
+ break;
+
+ case EVP_PKEY_OP_DECRYPT:
+ rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
+ break;
+
+ case EVP_PKEY_OP_DERIVE:
+ rv = EVP_PKEY_derive(ctx, out, poutlen);
+ break;
+
+ }
+ return rv;
+ }