> On May 17, 2022, at 4:32 AM, Matt Caswell <matt@xxxxxxxxxxx> wrote: > > > > On 16/05/2022 23:48, Philip Prindeville wrote: >> Sorry, I shouldn't have phrased that inartfully. >> There is no EVP_CIPHER_CTX_get_padding(), so how does one achieve something analogous? > > > From 3.0, assuming you are using provided ciphers (i.e. not engine ones), then OSSL_CIPHER_PARAM_PADDING is a "gettable" parameter. See the section "Gettable and Settable EVP_CIPHER_CTX parameters" on this page: > > https://www.openssl.org/docs/man3.0/man3/EVP_EncryptInit_ex2.html > > So you can use EVP_CIPHER_CTX_get_params() to obtain that value (documented on the same man page as above). E.g. something like: > > OSSL_PARAM params[2], *p = params; > unsigned int pad; > > *p++ = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, > &pad); > *p = OSSL_PARAM_construct_end(); > > if (!EVP_CIPHER_CTX_get_params(ctx, params)) { > /* Error */ > } > > Matt Thanks, and for 1.1.x?
