in source/evp_override.c [294:304]
int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *ctx, int pad) {
assert(ctx != NULL);
assert(
pad == RSA_PKCS1_PADDING || pad == RSA_SSLV23_PADDING || pad == RSA_NO_PADDING ||
pad == RSA_PKCS1_OAEP_PADDING || pad == RSA_X931_PADDING || pad == RSA_PKCS1_PSS_PADDING);
assert(IMPLIES(pad == RSA_X931_PADDING, ctx->is_initialized_for_signing));
ctx->rsa_pad = pad;
int rv;
__CPROVER_assume(rv == 0 || rv == 1);
return rv;
}