Fix misc size_t issues causing Windows warnings in 64 bit

Reviewed-by: Rich Salz <rsalz@openssl.org>

17 files changed, 137 insertions, 112 deletions

diff --git a/ssl/record/ssl3_record.c b/ssl/record/ssl3_record.c
index 240355bba1..7904447b73 100644
--- a/ssl/record/ssl3_record.c
+++ b/ssl/record/ssl3_record.c
@@ -1022,8 +1022,8 @@ int tls1_mac(SSL *ssl, SSL3_RECORD *rec, unsigned char *md, int send)
     header[8] = rec->type;
     header[9] = (unsigned char)(ssl->version >> 8);
     header[10] = (unsigned char)(ssl->version);
-    header[11] = (rec->length) >> 8;
-    header[12] = (rec->length) & 0xff;
+    header[11] = (unsigned char)(rec->length >> 8);
+    header[12] = (unsigned char)(rec->length & 0xff);
 
     if (!send && !SSL_USE_ETM(ssl) &&
         EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
diff --git a/ssl/s3_cbc.c b/ssl/s3_cbc.c
index e6b7f32639..29243f35a0 100644
--- a/ssl/s3_cbc.c
+++ b/ssl/s3_cbc.c
@@ -357,7 +357,7 @@ int ssl3_cbc_digest_record(const EVP_MD_CTX *ctx,
 
     if (k > 0) {
         if (is_sslv3) {
-            unsigned overhang;
+            size_t overhang;
 
             /*
              * The SSLv3 header is larger than a single block. overhang is
diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c
index 9283c74458..ba71bc14b4 100644
--- a/ssl/s3_enc.c
+++ b/ssl/s3_enc.c
@@ -439,7 +439,7 @@ size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 
     if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
         || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
-                           s->session->master_key_length,
+                           (int)s->session->master_key_length,
                            s->session->master_key) <= 0
         || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index d6d7c46287..45824012ef 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -3035,9 +3035,10 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg)
 
     case SSL_CTRL_GET_TLSEXT_STATUS_REQ_OCSP_RESP:
         *(unsigned char **)parg = s->tlsext_ocsp_resp;
-        if (s->tlsext_ocsp_resplen == 0)
+        if (s->tlsext_ocsp_resplen == 0
+                || s->tlsext_ocsp_resplen > LONG_MAX)
             return -1;
-        return s->tlsext_ocsp_resplen;
+        return (long)s->tlsext_ocsp_resplen;
 
     case SSL_CTRL_SET_TLSEXT_STATUS_REQ_OCSP_RESP:
         OPENSSL_free(s->tlsext_ocsp_resp);
@@ -3955,9 +3956,10 @@ int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, size_t len)
         unsigned long Time = (unsigned long)time(NULL);
         unsigned char *p = result;
         l2n(Time, p);
-        return RAND_bytes(p, len - 4);
+        /* TODO(size_t): Convert this */
+        return RAND_bytes(p, (int)(len - 4));
     } else
-        return RAND_bytes(result, len);
+        return RAND_bytes(result, (int)len);
 }
 
 int ssl_generate_master_secret(SSL *s, unsigned char *pms, size_t pmslen,
diff --git a/ssl/ssl_asn1.c b/ssl/ssl_asn1.c
index 9b6ea0a1f1..fd13f90c28 100644
--- a/ssl/ssl_asn1.c
+++ b/ssl/ssl_asn1.c
@@ -102,7 +102,7 @@ static void ssl_session_oinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os,
                               unsigned char *data, size_t len)
 {
     os->data = data;
-    os->length = len;
+    os->length = (int)len;
     os->flags = 0;
     *dest = os;
 }
diff --git a/ssl/ssl_ciph.c b/ssl/ssl_ciph.c
index 478d9a9bd4..9d259c1a15 100644
--- a/ssl/ssl_ciph.c
+++ b/ssl/ssl_ciph.c
@@ -175,7 +175,7 @@ static int ssl_cipher_info_find(const ssl_cipher_table * table,
     size_t i;
     for (i = 0; i < table_cnt; i++, table++) {
         if (table->mask == mask)
-            return i;
+            return (int)i;
     }
     return -1;
 }
diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index a869314bda..4e2369d52f 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -80,7 +80,7 @@ SSL3_ENC_METHOD ssl3_undef_enc_method = {
 struct ssl_async_args {
     SSL *s;
     void *buf;
-    int num;
+    size_t num;
     enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
     union {
         int (*func_read) (SSL *, void *, size_t, size_t *);
@@ -318,14 +318,14 @@ static int dane_tlsa_add(SSL_DANE *dane,
     t->usage = usage;
     t->selector = selector;
     t->mtype = mtype;
-    t->data = OPENSSL_malloc(ilen);
+    t->data = OPENSSL_malloc(dlen);
     if (t->data == NULL) {
         tlsa_free(t);
         SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
         return -1;
     }
-    memcpy(t->data, data, ilen);
-    t->dlen = ilen;
+    memcpy(t->data, data, dlen);
+    t->dlen = dlen;
 
     /* Validate and cache full certificate or public key */
     if (mtype == DANETLS_MATCHING_FULL) {
@@ -335,7 +335,7 @@ static int dane_tlsa_add(SSL_DANE *dane,
 
         switch (selector) {
         case DANETLS_SELECTOR_CERT:
-            if (!d2i_X509(&cert, &p, dlen) || p < data ||
+            if (!d2i_X509(&cert, &p, ilen) || p < data ||
                 dlen != (size_t)(p - data)) {
                 tlsa_free(t);
                 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
@@ -370,7 +370,7 @@ static int dane_tlsa_add(SSL_DANE *dane,
             break;
 
         case DANETLS_SELECTOR_SPKI:
-            if (!d2i_PUBKEY(&pkey, &p, dlen) || p < data ||
+            if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
                 dlen != (size_t)(p - data)) {
                 tlsa_free(t);
                 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
@@ -1304,7 +1304,7 @@ int SSL_pending(const SSL *s)
      * SSL_pending also cannot work properly if the value >INT_MAX. In that case
      * we just return INT_MAX.
      */
-    return pending < INT_MAX ? pending : INT_MAX;
+    return pending < INT_MAX ? (int)pending : INT_MAX;
 }
 
 int SSL_has_pending(const SSL *s)
@@ -1382,7 +1382,7 @@ int SSL_copy_session_id(SSL *t, const SSL *f)
     CRYPTO_atomic_add(&f->cert->references, 1, &i, f->cert->lock);
     ssl_cert_free(t->cert);
     t->cert = f->cert;
-    if (!SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length)) {
+    if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
         return 0;
     }
 
@@ -1513,7 +1513,7 @@ static int ssl_io_intern(void *vargs)
     struct ssl_async_args *args;
     SSL *s;
     void *buf;
-    int num;
+    size_t num;
 
     args = (struct ssl_async_args *)vargs;
     s = args->s;
@@ -1767,11 +1767,13 @@ long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
     case SSL_CTRL_CLEAR_MODE:
         return (s->mode &= ~larg);
     case SSL_CTRL_GET_MAX_CERT_LIST:
-        return (s->max_cert_list);
+        return (long)(s->max_cert_list);
     case SSL_CTRL_SET_MAX_CERT_LIST:
-        l = s->max_cert_list;
-        s->max_cert_list = larg;
-        return (l);
+        if (larg < 0)
+            return 0;
+        l = (long)s->max_cert_list;
+        s->max_cert_list = (size_t)larg;
+        return l;
     case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
         if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
             return 0;
@@ -1879,18 +1881,22 @@ long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
         return 1;
 
     case SSL_CTRL_GET_MAX_CERT_LIST:
-        return (ctx->max_cert_list);
+        return (long)(ctx->max_cert_list);
     case SSL_CTRL_SET_MAX_CERT_LIST:
-        l = ctx->max_cert_list;
-        ctx->max_cert_list = larg;
-        return (l);
+        if (larg < 0)
+            return 0;
+        l = (long)ctx->max_cert_list;
+        ctx->max_cert_list = (size_t)larg;
+        return l;
 
     case SSL_CTRL_SET_SESS_CACHE_SIZE:
-        l = ctx->session_cache_size;
-        ctx->session_cache_size = larg;
-        return (l);
+        if (larg < 0)
+            return 0;
+        l = (long)ctx->session_cache_size;
+        ctx->session_cache_size = (size_t)larg;
+        return l;
     case SSL_CTRL_GET_SESS_CACHE_SIZE:
-        return (ctx->session_cache_size);
+        return (long)(ctx->session_cache_size);
     case SSL_CTRL_SET_SESS_CACHE_MODE:
         l = ctx->session_cache_mode;
         ctx->session_cache_mode = larg;
@@ -2249,7 +2255,7 @@ void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
     if (!*data) {
         *len = 0;
     } else {
-        *len = s->next_proto_negotiated_len;
+        *len = (unsigned int)s->next_proto_negotiated_len;
     }
 }
 
@@ -2366,7 +2372,7 @@ void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
     if (*data == NULL)
         *len = 0;
     else
-        *len = ssl->s3->alpn_selected_len;
+        *len = (unsigned int)ssl->s3->alpn_selected_len;
 }
 
 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
@@ -3227,7 +3233,8 @@ SSL *SSL_dup(SSL *s)
                 goto err;
         }
 
-        if (!SSL_set_session_id_context(ret, s->sid_ctx, s->sid_ctx_length))
+        if (!SSL_set_session_id_context(ret, s->sid_ctx,
+                                        (int)s->sid_ctx_length))
             goto err;
     }
 
@@ -4068,7 +4075,7 @@ static int ct_extract_ocsp_response_scts(SSL *s)
         goto err;
 
     p = s->tlsext_ocsp_resp;
-    rsp = d2i_OCSP_RESPONSE(NULL, &p, s->tlsext_ocsp_resplen);
+    rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->tlsext_ocsp_resplen);
     if (rsp == NULL)
         goto err;
 
diff --git a/ssl/ssl_mcnf.c b/ssl/ssl_mcnf.c
index c2d9dba64a..59674f3d39 100644
--- a/ssl/ssl_mcnf.c
+++ b/ssl/ssl_mcnf.c
@@ -73,7 +73,7 @@ static int ssl_module_init(CONF_IMODULE *md, const CONF *cnf)
     ssl_names_count = cnt;
     for (i = 0; i < ssl_names_count; i++) {
         struct ssl_conf_name *ssl_name = ssl_names + i;
-        CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, i);
+        CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, (int)i);
         STACK_OF(CONF_VALUE) *cmds = NCONF_get_section(cnf, sect->value);
         if (sk_CONF_VALUE_num(cmds) <= 0) {
             if (cmds == NULL)
@@ -94,7 +94,7 @@ static int ssl_module_init(CONF_IMODULE *md, const CONF *cnf)
         ssl_name->cmd_count = cnt;
         for (j = 0; j < cnt; j++) {
             const char *name;
-            CONF_VALUE *cmd_conf = sk_CONF_VALUE_value(cmds, j);
+            CONF_VALUE *cmd_conf = sk_CONF_VALUE_value(cmds, (int)j);
             struct ssl_conf_cmd *cmd = ssl_name->cmds + j;
             /* Skip any initial dot in name */
             name = strchr(cmd_conf->name, '.');
diff --git a/ssl/ssl_sess.c b/ssl/ssl_sess.c
index e0ec918c91..44101cbb0c 100644
--- a/ssl/ssl_sess.c
+++ b/ssl/ssl_sess.c
@@ -236,14 +236,14 @@ SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket)
 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
 {
     if (len)
-        *len = s->session_id_length;
+        *len = (unsigned int)s->session_id_length;
     return s->session_id;
 }
 const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
                                                 unsigned int *len)
 {
     if (len != NULL)
-        *len = s->sid_ctx_length;
+        *len = (unsigned int)s->sid_ctx_length;
     return s->sid_ctx;
 }
 
@@ -369,7 +369,7 @@ int ssl_get_new_session(SSL *s, int session)
         CRYPTO_THREAD_unlock(s->lock);
         /* Choose a session ID */
         memset(ss->session_id, 0, ss->session_id_length);
-        tmp = ss->session_id_length;
+        tmp = (int)ss->session_id_length;
         if (!cb(s, ss->session_id, &tmp)) {
             /* The callback failed */
             SSLerr(SSL_F_SSL_GET_NEW_SESSION,
@@ -391,7 +391,7 @@ int ssl_get_new_session(SSL *s, int session)
         ss->session_id_length = tmp;
         /* Finally, check for a conflict */
         if (SSL_has_matching_session_id(s, ss->session_id,
-                                        ss->session_id_length)) {
+                                        (unsigned int)ss->session_id_length)) {
             SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT);
             SSL_SESSION_free(ss);
             return (0);
@@ -502,7 +502,7 @@ int ssl_get_prev_session(SSL *s, const PACKET *ext, const PACKET *session_id)
         ret == NULL && s->session_ctx->get_session_cb != NULL) {
         int copy = 1;
         ret = s->session_ctx->get_session_cb(s, PACKET_data(session_id),
-                                             PACKET_remaining(session_id),
+                                             (int)PACKET_remaining(session_id),
                                              &copy);
 
         if (ret != NULL) {
diff --git a/ssl/ssl_txt.c b/ssl/ssl_txt.c
index a7faf4889e..06ea6463ab 100644
--- a/ssl/ssl_txt.c
+++ b/ssl/ssl_txt.c
@@ -128,8 +128,9 @@ int SSL_SESSION_print(BIO *bp, const SSL_SESSION *x)
     if (x->tlsext_tick) {
         if (BIO_puts(bp, "\n    TLS session ticket:\n") <= 0)
             goto err;
+        /* TODO(size_t): Convert this call */
         if (BIO_dump_indent
-            (bp, (const char *)x->tlsext_tick, x->tlsext_ticklen, 4)
+            (bp, (const char *)x->tlsext_tick, (int)x->tlsext_ticklen, 4)
             <= 0)
             goto err;
     }
diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c
index 194243fc9d..bde5373fe7 100644
--- a/ssl/statem/statem_clnt.c
+++ b/ssl/statem/statem_clnt.c
@@ -1358,18 +1358,19 @@ static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
         return 0;
     }
 
+    /* TODO(size_t): Convert BN_bin2bn() calls */
     if ((s->srp_ctx.N =
          BN_bin2bn(PACKET_data(&prime),
-                   PACKET_remaining(&prime), NULL)) == NULL
+                   (int)PACKET_remaining(&prime), NULL)) == NULL
         || (s->srp_ctx.g =
             BN_bin2bn(PACKET_data(&generator),
-                      PACKET_remaining(&generator), NULL)) == NULL
+                      (int)PACKET_remaining(&generator), NULL)) == NULL
         || (s->srp_ctx.s =
             BN_bin2bn(PACKET_data(&salt),
-                      PACKET_remaining(&salt), NULL)) == NULL
+                      (int)PACKET_remaining(&salt), NULL)) == NULL
         || (s->srp_ctx.B =
             BN_bin2bn(PACKET_data(&server_pub),
-                      PACKET_remaining(&server_pub), NULL)) == NULL) {
+                      (int)PACKET_remaining(&server_pub), NULL)) == NULL) {
         *al = SSL_AD_INTERNAL_ERROR;
         SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
         return 0;
@@ -1419,10 +1420,12 @@ static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
         goto err;
     }
 
-    p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
-    g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
-    bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
-                          NULL);
+    /* TODO(size_t): Convert these calls */
+    p = BN_bin2bn(PACKET_data(&prime), (int)PACKET_remaining(&prime), NULL);
+    g = BN_bin2bn(PACKET_data(&generator), (int)PACKET_remaining(&generator),
+                  NULL);
+    bnpub_key = BN_bin2bn(PACKET_data(&pub_key),
+                          (int)PACKET_remaining(&pub_key), NULL);
     if (p == NULL || g == NULL || bnpub_key == NULL) {
         *al = SSL_AD_INTERNAL_ERROR;
         SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
@@ -1710,8 +1713,10 @@ MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
             SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
             goto err;
         }
+        /* TODO(size_t): Convert this call */
         if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
-                            PACKET_remaining(&signature), pkey) <= 0) {
+                            (unsigned int)PACKET_remaining(&signature),
+                            pkey) <= 0) {
             /* bad signature */
             EVP_MD_CTX_free(md_ctx);
             al = SSL_AD_DECRYPT_ERROR;
@@ -2193,7 +2198,8 @@ static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
 
     pms[0] = s->client_version >> 8;
     pms[1] = s->client_version & 0xff;
-    if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
+    /* TODO(size_t): Convert this function */
+    if (RAND_bytes(pms + 2, (int)(pmslen - 2)) <= 0) {
         goto err;
     }
 
@@ -2283,7 +2289,7 @@ static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
 {
 #ifndef OPENSSL_NO_EC
     unsigned char *encodedPoint = NULL;
-    int encoded_pt_len = 0;
+    size_t encoded_pt_len = 0;
     EVP_PKEY *ckey = NULL, *skey = NULL;
     int ret = 0;
 
@@ -2375,8 +2381,10 @@ static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
     }
 
     if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
-        /* Generate session key */
-        || RAND_bytes(pms, pmslen) <= 0) {
+        /* Generate session key
+         * TODO(size_t): Convert this function
+         */
+        || RAND_bytes(pms, (int)pmslen) <= 0) {
         *al = SSL_AD_INTERNAL_ERROR;
         SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
         goto err;
@@ -2617,7 +2625,7 @@ int tls_construct_client_verify(SSL *s, WPACKET *pkt)
         || !EVP_SignUpdate(mctx, hdata, hdatalen)
         || (s->version == SSL3_VERSION
             && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
-                                s->session->master_key_length,
+                                (int)s->session->master_key_length,
                                 s->session->master_key))
         || !EVP_SignFinal(mctx, sig, &u, pkey)) {
         SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
diff --git a/ssl/statem/statem_dtls.c b/ssl/statem/statem_dtls.c
index 6053a58b9c..d2b5f877dc 100644
--- a/ssl/statem/statem_dtls.c
+++ b/ssl/statem/statem_dtls.c
@@ -390,11 +390,10 @@ int dtls_get_message(SSL *s, int *mt, size_t *len)
  * permitted in a DTLS handshake message for |s|. The minimum is 16KB, but
  * may be greater if the maximum certificate list size requires it.
  */
-static unsigned long dtls1_max_handshake_message_len(const SSL *s)
+static size_t dtls1_max_handshake_message_len(const SSL *s)
 {
-    unsigned long max_len =
-        DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH;
-    if (max_len < (unsigned long)s->max_cert_list)
+    size_t max_len = DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH;
+    if (max_len < s->max_cert_list)
         return s->max_cert_list;
     return max_len;
 }
diff --git a/ssl/statem/statem_lib.c b/ssl/statem/statem_lib.c
index 30d674ef0f..1ce14ee640 100644
--- a/ssl/statem/statem_lib.c
+++ b/ssl/statem/statem_lib.c
@@ -155,7 +155,7 @@ static void ssl3_take_mac(SSL *s)
 MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
 {
     int al;
-    long remain;
+    size_t remain;
 
     remain = PACKET_remaining(pkt);
     /*
diff --git a/ssl/statem/statem_srvr.c b/ssl/statem/statem_srvr.c
index 83e698b999..6aa897bfd5 100644
--- a/ssl/statem/statem_srvr.c
+++ b/ssl/statem/statem_srvr.c
@@ -888,7 +888,8 @@ int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt)
 MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt)
 {
     int i, al = SSL_AD_INTERNAL_ERROR;
-    unsigned int j, complen = 0;
+    unsigned int j;
+    size_t loop, complen = 0;
     unsigned long id;
     const SSL_CIPHER *c;
 #ifndef OPENSSL_NO_COMP
@@ -1087,8 +1088,7 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt)
         if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) {
             if (s->ctx->app_verify_cookie_cb != NULL) {
                 if (s->ctx->app_verify_cookie_cb(s, PACKET_data(&cookie),
-                                                 PACKET_remaining(&cookie)) ==
-                    0) {
+                        (unsigned int)PACKET_remaining(&cookie)) == 0) {
                     al = SSL_AD_HANDSHAKE_FAILURE;
                     SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO,
                            SSL_R_COOKIE_MISMATCH);
@@ -1197,12 +1197,12 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt)
     }
 
     complen = PACKET_remaining(&compression);
-    for (j = 0; j < complen; j++) {
-        if (PACKET_data(&compression)[j] == 0)
+    for (loop = 0; loop < complen; loop++) {
+        if (PACKET_data(&compression)[loop] == 0)
             break;
     }
 
-    if (j >= complen) {
+    if (loop >= complen) {
         /* no compress */
         al = SSL_AD_DECODE_ERROR;
         SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_NO_COMPRESSION_SPECIFIED);
@@ -1576,7 +1576,7 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt)
 #endif
 #ifndef OPENSSL_NO_EC
     unsigned char *encodedPoint = NULL;
-    int encodedlen = 0;
+    size_t encodedlen = 0;
     int curve_id = 0;
 #endif
     EVP_PKEY *pkey;
@@ -1909,7 +1909,7 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt)
 
 int tls_construct_certificate_request(SSL *s, WPACKET *pkt)
 {
-    int i, nl;
+    int i;
     STACK_OF(X509_NAME) *sk = NULL;
 
     /* get the list of acceptable cert types */
@@ -1922,7 +1922,7 @@ int tls_construct_certificate_request(SSL *s, WPACKET *pkt)
 
     if (SSL_USE_SIGALGS(s)) {
         const unsigned char *psigs;
-        nl = tls12_get_psigalgs(s, &psigs);
+        size_t nl = tls12_get_psigalgs(s, &psigs);
         if (!WPACKET_start_sub_packet_u16(pkt)
                 || !tls12_copy_sigalgs(s, pkt, psigs, nl)
                 || !WPACKET_close(pkt)) {
@@ -2103,9 +2103,10 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al)
      * Decrypt with no padding. PKCS#1 padding will be removed as part of
      * the timing-sensitive code below.
      */
-    decrypt_len = RSA_private_decrypt(PACKET_remaining(&enc_premaster),
-                                      PACKET_data(&enc_premaster),
-                                      rsa_decrypt, rsa, RSA_NO_PADDING);
+     /* TODO(size_t): Convert this function */
+    decrypt_len = (int)RSA_private_decrypt((int)PACKET_remaining(&enc_premaster),
+                                           PACKET_data(&enc_premaster),
+                                           rsa_decrypt, rsa, RSA_NO_PADDING);
     if (decrypt_len < 0)
         goto err;
 
@@ -2386,7 +2387,7 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al)
     unsigned long alg_a;
     int Ttag, Tclass;
     long Tlen;
-    long sess_key_len;
+    size_t sess_key_len;
     const unsigned char *data;
     int ret = 0;
 
@@ -2436,8 +2437,9 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al)
         SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, ERR_R_INTERNAL_ERROR);
         goto err;
     }
+    /* TODO(size_t): Convert this function */
     if (ASN1_get_object((const unsigned char **)&data, &Tlen, &Ttag,
-                        &Tclass, sess_key_len) != V_ASN1_CONSTRUCTED
+                        &Tclass, (long)sess_key_len) != V_ASN1_CONSTRUCTED
         || Ttag != V_ASN1_SEQUENCE || Tclass != V_ASN1_UNIVERSAL) {
         *al = SSL_AD_DECODE_ERROR;
         SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, SSL_R_DECRYPTION_FAILED);
@@ -2739,7 +2741,7 @@ MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
 
     if (s->version == SSL3_VERSION
         && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
-                            s->session->master_key_length,
+                            (int)s->session->master_key_length,
                             s->session->master_key)) {
         SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
         al = SSL_AD_INTERNAL_ERROR;
diff --git a/ssl/t1_enc.c b/ssl/t1_enc.c
index f200040bac..16d3d3e816 100644
--- a/ssl/t1_enc.c
+++ b/ssl/t1_enc.c
@@ -64,18 +64,18 @@ static int tls1_PRF(SSL *s,
     pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL);
     if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0
         || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0
-        || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, slen) <= 0)
+        || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, (int)slen) <= 0)
         goto err;
 
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, seed1_len) <= 0)
+    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, (int)seed1_len) <= 0)
         goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, seed2_len) <= 0)
+    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, (int)seed2_len) <= 0)
         goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, seed3_len) <= 0)
+    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, (int)seed3_len) <= 0)
         goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, seed4_len) <= 0)
+    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, (int)seed4_len) <= 0)
         goto err;
-    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, seed5_len) <= 0)
+    if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, (int)seed5_len) <= 0)
         goto err;
 
     if (EVP_PKEY_derive(pctx, out, &olen) <= 0)
@@ -250,8 +250,9 @@ int tls1_change_cipher_state(SSL *s, int which)
     memcpy(mac_secret, ms, i);
 
     if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
+        /* TODO(size_t): Convert this function */
         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
-                                       mac_secret, *mac_secret_size);
+                                       mac_secret, (int)*mac_secret_size);
         if (mac_key == NULL
             || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) {
             EVP_PKEY_free(mac_key);
@@ -271,7 +272,8 @@ int tls1_change_cipher_state(SSL *s, int which)
 
     if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
         if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
-            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) {
+            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
+                                    iv)) {
             SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
             goto err2;
         }
@@ -285,7 +287,7 @@ int tls1_change_cipher_state(SSL *s, int which)
         if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
             || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
-            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, k, iv)
+            || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
             || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
             SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
             goto err2;
@@ -299,7 +301,7 @@ int tls1_change_cipher_state(SSL *s, int which)
     /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
     if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
         && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
-                                *mac_secret_size, mac_secret)) {
+                                (int)*mac_secret_size, mac_secret)) {
         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
         goto err2;
     }
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 6a1386cb36..0523e54718 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -246,7 +246,7 @@ int tls1_ec_nid2curve_id(int nid)
     size_t i;
     for (i = 0; i < OSSL_NELEM(nid_list); i++) {
         if (nid_list[i].nid == nid)
-            return i + 1;
+            return (int)(i + 1);
     }
     return 0;
 }
@@ -1151,7 +1151,7 @@ int ssl_add_clienthello_tlsext(SSL *s, WPACKET *pkt, int *al)
 #endif                          /* OPENSSL_NO_EC */
 
     if (tls_use_ticket(s)) {
-        int ticklen;
+        size_t ticklen;
         if (!s->new_session && s->session && s->session->tlsext_tick)
             ticklen = s->session->tlsext_ticklen;
         else if (s->session && s->tlsext_session_ticket &&
@@ -1663,7 +1663,7 @@ static int tls1_alpn_handle_client_hello_late(SSL *s, int *al)
     if (s->ctx->alpn_select_cb != NULL && s->s3->alpn_proposed != NULL) {
         int r = s->ctx->alpn_select_cb(s, &selected, &selected_len,
                                        s->s3->alpn_proposed,
-                                       s->s3->alpn_proposed_len,
+                                       (unsigned int)s->s3->alpn_proposed_len,
                                        s->ctx->alpn_select_cb_arg);
 
         if (r == SSL_TLSEXT_ERR_OK) {
@@ -1825,7 +1825,7 @@ static int ssl_scan_clienthello_tlsext(SSL *s, PACKET *pkt, int *al)
 
         if (s->tlsext_debug_cb)
             s->tlsext_debug_cb(s, 0, type, PACKET_data(&extension),
-                               PACKET_remaining(&extension),
+                               (int)PACKET_remaining(&extension),
                                s->tlsext_debug_arg);
 
         if (type == TLSEXT_TYPE_renegotiate) {
@@ -1977,7 +1977,7 @@ static int ssl_scan_clienthello_tlsext(SSL *s, PACKET *pkt, int *al)
         else if (type == TLSEXT_TYPE_session_ticket) {
             if (s->tls_session_ticket_ext_cb &&
                 !s->tls_session_ticket_ext_cb(s, PACKET_data(&extension),
-                                              PACKET_remaining(&extension),
+                                              (int)PACKET_remaining(&extension),
                                               s->tls_session_ticket_ext_cb_arg))
             {
                 *al = TLS1_AD_INTERNAL_ERROR;
@@ -2039,8 +2039,9 @@ static int ssl_scan_clienthello_tlsext(SSL *s, PACKET *pkt, int *al)
                     }
 
                     id_data = PACKET_data(&responder_id);
+                    /* TODO(size_t): Convert d2i_* to size_t */
                     id = d2i_OCSP_RESPID(NULL, &id_data,
-                                         PACKET_remaining(&responder_id));
+                                         (int)PACKET_remaining(&responder_id));
                     if (id == NULL)
                         return 0;
 
@@ -2066,7 +2067,7 @@ static int ssl_scan_clienthello_tlsext(SSL *s, PACKET *pkt, int *al)
                                                X509_EXTENSION_free);
                     s->tlsext_ocsp_exts =
                         d2i_X509_EXTENSIONS(NULL, &ext_data,
-                                            PACKET_remaining(&exts));
+                                            (int)PACKET_remaining(&exts));
                     if (s->tlsext_ocsp_exts == NULL
                         || ext_data != PACKET_end(&exts)) {
                         return 0;
@@ -2961,7 +2962,8 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick,
     SSL_SESSION *sess;
     unsigned char *sdec;
     const unsigned char *p;