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-rw-r--r--doc/man3/EVP_DigestVerifyInit.pod9
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/man3/EVP_DigestVerifyInit.pod b/doc/man3/EVP_DigestVerifyInit.pod
index 0d25debcb1..e93ac2ef08 100644
--- a/doc/man3/EVP_DigestVerifyInit.pod
+++ b/doc/man3/EVP_DigestVerifyInit.pod
@@ -26,10 +26,15 @@ B<type> from ENGINE B<e> and public key B<pkey>. B<ctx> must be created
with EVP_MD_CTX_new() before calling this function. If B<pctx> is not NULL, the
EVP_PKEY_CTX of the verification operation will be written to B<*pctx>: this
can be used to set alternative verification options. Note that any existing
-value in B<*pctx> is overwritten. The EVP_PKEY_CTX value returned must not be
-freed directly by the application (it will be freed automatically when the
+value in B<*pctx> is overwritten. The EVP_PKEY_CTX value returned must not be freed
+directly by the application if B<ctx> is not assigned an EVP_PKEY_CTX value before
+being passed to EVP_DigestSignInit() (which means the EVP_PKEY_CTX is created
+inside EVP_DigestSignInit() and it will be freed automatically when the
EVP_MD_CTX is freed).
+No B<EVP_PKEY_CTX> will be created by EVP_DigsetSignInit() if the passed B<ctx>
+has already been assigned one via L<EVP_MD_CTX_set_ctx(3)>. See also L<SM2(7)>.
+
EVP_DigestVerifyUpdate() hashes B<cnt> bytes of data at B<d> into the
verification context B<ctx>. This function can be called several times on the
same B<ctx> to include additional data. This function is currently implemented