sha1_update
ret = sha1_update(&(ctx->sha1ctx), chunk, chunklen); EG(ret, err);
ret = sha1_update(&ctx, inputs[pos], ilens[pos]); EG(ret, err);
ret = sha1_update(&ctx, input, ilen); EG(ret, err);
ATTRIBUTE_WARN_UNUSED_RET int sha1_update(sha1_context *ctx, const u8 *input, u32 ilen);
#define SHA1_Update sha1_update
LEGACY_EVP_MD_METH_TABLE(sha1_init, sha1_update, sha1_final, sha1_int_ctrl,
sha1_update(&sctx->md, in + iv, sha_off);
sha1_update(&sctx->md, in + sha_off, plen - sha_off);
sha1_update(&sctx->md, out + plen, SHA_DIGEST_LENGTH);
sha1_update(&sctx->md, ctx->aux.tls_aad, plen);
sha1_update(&sctx->md, out, j);
sha1_update(&sctx->md, pmac->c, SHA_DIGEST_LENGTH);
sha1_update(&sctx->md, out, len);
sha1_update(&ctx->head, mac, len);
sha1_update(&ctx->head, hmac_key, sizeof(hmac_key));
sha1_update(&ctx->tail, hmac_key, sizeof(hmac_key));
sha1_update(&sctx->md, p, aad_len);
sha1_update(&sctx->md, param->inp, 13);