diff options
Diffstat (limited to 'doc/man3/EVP_DigestSignInit.pod')
| -rw-r--r-- | doc/man3/EVP_DigestSignInit.pod | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/doc/man3/EVP_DigestSignInit.pod b/doc/man3/EVP_DigestSignInit.pod index fe2be7bbf5..773de87efa 100644 --- a/doc/man3/EVP_DigestSignInit.pod +++ b/doc/man3/EVP_DigestSignInit.pod @@ -28,8 +28,15 @@ EVP_MD_CTX_new() before calling this function. If B<pctx> is not NULL, the EVP_PKEY_CTX of the signing operation will be written to B<*pctx>: this can be used to set alternative signing 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 EVP_MD_CTX -is freed). The digest B<type> may be NULL if the signing algorithm supports it. +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). + +The digest B<type> may be NULL if the signing algorithm supports it. + +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)>. Only EVP_PKEY types that support signing can be used with these functions. This includes MAC algorithms where the MAC generation is considered as a form of |