EVP_PKEY_CTX_set_signature_md
if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0)
if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0)
(EVP_PKEY_CTX_set_signature_md(pctx, md) <= 0) ||