ssl/record/ssl3_record.c:465: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - [0, 64]):unsigned64 by call to `ssl3_cbc_copy_mac`.
Showing all 9 steps of the trace


ssl/record/ssl3_record.c:125:1: Parameter `s->rlayer.rrec.length`
123.    */
124.   /* used only by ssl3_read_bytes */
125. > int ssl3_get_record(SSL *s)
126.   {
127.       int al;

ssl/record/ssl3_record.c:356:9: Assignment
354.           /* decrypt in place in 'rr->input' */
355.           rr[num_recs].data = rr[num_recs].input;
356.           rr[num_recs].orig_len = rr[num_recs].length;
               ^
357.   
358.           /* Mark this record as not read by upper layers yet */

ssl/record/ssl3_record.c:465:17: Call
463.                    */
464.                   mac = mac_tmp;
465.                   ssl3_cbc_copy_mac(mac_tmp, &rr[j], mac_size);
                       ^
466.                   rr[j].length -= mac_size;
467.               } else {

ssl/record/ssl3_record.c:1283:1: <LHS trace>
1281.   #define CBC_MAC_ROTATE_IN_PLACE
1282.   
1283. > void ssl3_cbc_copy_mac(unsigned char *out,
1284.                          const SSL3_RECORD *rec, size_t md_size)
1285.   {

ssl/record/ssl3_record.c:1283:1: Parameter `rec->length`
  1281.   #define CBC_MAC_ROTATE_IN_PLACE
  1282.   
  1283. > void ssl3_cbc_copy_mac(unsigned char *out,
  1284.                          const SSL3_RECORD *rec, size_t md_size)
  1285.   {

ssl/record/ssl3_record.c:1296:5: Assignment
  1294.        * mac_end is the index of |rec->data| just after the end of the MAC.
  1295.        */
  1296.       size_t mac_end = rec->length;
              ^
  1297.       size_t mac_start = mac_end - md_size;
  1298.       /*

ssl/record/ssl3_record.c:1283:1: <RHS trace>
1281.   #define CBC_MAC_ROTATE_IN_PLACE
1282.   
1283. > void ssl3_cbc_copy_mac(unsigned char *out,
1284.                          const SSL3_RECORD *rec, size_t md_size)
1285.   {

ssl/record/ssl3_record.c:1283:1: Parameter `md_size`
  1281.   #define CBC_MAC_ROTATE_IN_PLACE
  1282.   
  1283. > void ssl3_cbc_copy_mac(unsigned char *out,
  1284.                          const SSL3_RECORD *rec, size_t md_size)
  1285.   {

ssl/record/ssl3_record.c:1297:5: Binary operation: ([0, +oo] - [0, 64]):unsigned64 by call to `ssl3_cbc_copy_mac` 
  1295.        */
  1296.       size_t mac_end = rec->length;
  1297.       size_t mac_start = mac_end - md_size;
              ^
  1298.       /*
  1299.        * scan_start contains the number of bytes that we can ignore because the

void ssl3_cbc_copy_mac(unsigned char *out,
                       const SSL3_RECORD *rec, size_t md_size)
{
#if defined(CBC_MAC_ROTATE_IN_PLACE)
    unsigned char rotated_mac_buf[64 + EVP_MAX_MD_SIZE];
    unsigned char *rotated_mac;
#else
    unsigned char rotated_mac[EVP_MAX_MD_SIZE];
#endif
    size_t mac_end = rec->length;
    size_t mac_start = mac_end - md_size;
    size_t scan_start = 0;
    size_t i, j;
    size_t div_spoiler;
    size_t rotate_offset;
    OPENSSL_assert(rec->orig_len >= md_size);
    OPENSSL_assert(md_size <= EVP_MAX_MD_SIZE);
#if defined(CBC_MAC_ROTATE_IN_PLACE)
    rotated_mac = rotated_mac_buf + ((0 - (size_t)rotated_mac_buf) & 63);
#endif
    if (rec->orig_len > md_size + 255 + 1)
        scan_start = rec->orig_len - (md_size + 255 + 1);
    div_spoiler = md_size >> 1;
    div_spoiler <<= (sizeof(div_spoiler) - 1) * 8;
    rotate_offset = (div_spoiler + mac_start - scan_start) % md_size;
    memset(rotated_mac, 0, md_size);
    for (i = scan_start, j = 0; i < rec->orig_len; i++) {
        unsigned char mac_started = constant_time_ge_8_s(i, mac_start);
        unsigned char mac_ended = constant_time_ge_8_s(i, mac_end);
        unsigned char b = rec->data[i];
        rotated_mac[j++] |= b & mac_started & ~mac_ended;
        j &= constant_time_lt_s(j, md_size);
    }
#if defined(CBC_MAC_ROTATE_IN_PLACE)
    j = 0;
    for (i = 0; i < md_size; i++) {
        ((volatile unsigned char *)rotated_mac)[rotate_offset ^ 32];
        out[j++] = rotated_mac[rotate_offset++];
        rotate_offset &= constant_time_lt_s(rotate_offset, md_size);
    }
#else
    memset(out, 0, md_size);
    rotate_offset = md_size - rotate_offset;
    rotate_offset &= constant_time_lt_s(rotate_offset, md_size);
    for (i = 0; i < md_size; i++) {
        for (j = 0; j < md_size; j++)
            out[j] |= rotated_mac[i] & constant_time_eq_8_s(j, rotate_offset);
        rotate_offset++;
        rotate_offset &= constant_time_lt_s(rotate_offset, md_size);
    }
#endif
}
['int ssl3_get_record(SSL *s)\n{\n    int al;\n    int enc_err, rret, ret = -1;\n    int i;\n    size_t more, n;\n    SSL3_RECORD *rr;\n    SSL3_BUFFER *rbuf;\n    SSL_SESSION *sess;\n    unsigned char *p;\n    unsigned char md[EVP_MAX_MD_SIZE];\n    unsigned int version;\n    size_t mac_size;\n    int imac_size;\n    size_t num_recs = 0, max_recs, j;\n    PACKET pkt, sslv2pkt;\n    rr = RECORD_LAYER_get_rrec(&s->rlayer);\n    rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);\n    max_recs = s->max_pipelines;\n    if (max_recs == 0)\n        max_recs = 1;\n    sess = s->session;\n    do {\n        if ((RECORD_LAYER_get_rstate(&s->rlayer) != SSL_ST_READ_BODY) ||\n            (RECORD_LAYER_get_packet_length(&s->rlayer)\n             < SSL3_RT_HEADER_LENGTH)) {\n            size_t sslv2len;\n            unsigned int type;\n            rret = ssl3_read_n(s, SSL3_RT_HEADER_LENGTH,\n                               SSL3_BUFFER_get_len(rbuf), 0,\n                               num_recs == 0 ? 1 : 0, &n);\n            if (rret <= 0)\n                return rret;\n            RECORD_LAYER_set_rstate(&s->rlayer, SSL_ST_READ_BODY);\n            p = RECORD_LAYER_get_packet(&s->rlayer);\n            if (!PACKET_buf_init(&pkt, RECORD_LAYER_get_packet(&s->rlayer),\n                                 RECORD_LAYER_get_packet_length(&s->rlayer))) {\n                al = SSL_AD_INTERNAL_ERROR;\n                SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);\n                goto f_err;\n            }\n            sslv2pkt = pkt;\n            if (!PACKET_get_net_2_len(&sslv2pkt, &sslv2len)\n                    || !PACKET_get_1(&sslv2pkt, &type)) {\n                al = SSL_AD_INTERNAL_ERROR;\n                SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);\n                goto f_err;\n            }\n            if (s->server && RECORD_LAYER_is_first_record(&s->rlayer)\n                    && (sslv2len & 0x8000) != 0\n                    && (type == SSL2_MT_CLIENT_HELLO)) {\n                rr[num_recs].type = SSL3_RT_HANDSHAKE;\n                rr[num_recs].rec_version = SSL2_VERSION;\n                rr[num_recs].length = sslv2len & 0x7fff;\n                if (rr[num_recs].length > SSL3_BUFFER_get_len(rbuf)\n                    - SSL2_RT_HEADER_LENGTH) {\n                    al = SSL_AD_RECORD_OVERFLOW;\n                    SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_PACKET_LENGTH_TOO_LONG);\n                    goto f_err;\n                }\n                if (rr[num_recs].length < MIN_SSL2_RECORD_LEN) {\n                    al = SSL_AD_HANDSHAKE_FAILURE;\n                    SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);\n                    goto f_err;\n                }\n            } else {\n                if (s->msg_callback)\n                    s->msg_callback(0, 0, SSL3_RT_HEADER, p, 5, s,\n                                    s->msg_callback_arg);\n                if (!PACKET_get_1(&pkt, &type)\n                        || !PACKET_get_net_2(&pkt, &version)\n                        || !PACKET_get_net_2_len(&pkt, &rr[num_recs].length)) {\n                    al = SSL_AD_INTERNAL_ERROR;\n                    SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);\n                    goto f_err;\n                }\n                rr[num_recs].type = type;\n                rr[num_recs].rec_version = version;\n                if (!s->first_packet && !SSL_IS_TLS13(s)\n                        && version != (unsigned int)s->version) {\n                    SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_WRONG_VERSION_NUMBER);\n                    if ((s->version & 0xFF00) == (version & 0xFF00)\n                        && !s->enc_write_ctx && !s->write_hash) {\n                        if (rr->type == SSL3_RT_ALERT) {\n                            goto err;\n                        }\n                        s->version = (unsigned short)version;\n                    }\n                    al = SSL_AD_PROTOCOL_VERSION;\n                    goto f_err;\n                }\n                if ((version >> 8) != SSL3_VERSION_MAJOR) {\n                    if (RECORD_LAYER_is_first_record(&s->rlayer)) {\n                        p = RECORD_LAYER_get_packet(&s->rlayer);\n                        if (strncmp((char *)p, "GET ", 4) == 0 ||\n                            strncmp((char *)p, "POST ", 5) == 0 ||\n                            strncmp((char *)p, "HEAD ", 5) == 0 ||\n                            strncmp((char *)p, "PUT ", 4) == 0) {\n                            SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_HTTP_REQUEST);\n                            goto err;\n                        } else if (strncmp((char *)p, "CONNE", 5) == 0) {\n                            SSLerr(SSL_F_SSL3_GET_RECORD,\n                                   SSL_R_HTTPS_PROXY_REQUEST);\n                            goto err;\n                        }\n                        SSLerr(SSL_F_SSL3_GET_RECORD,\n                               SSL_R_WRONG_VERSION_NUMBER);\n                        goto err;\n                    } else {\n                        SSLerr(SSL_F_SSL3_GET_RECORD,\n                               SSL_R_WRONG_VERSION_NUMBER);\n                        al = SSL_AD_PROTOCOL_VERSION;\n                        goto f_err;\n                    }\n                }\n                if (SSL_IS_TLS13(s) && s->enc_read_ctx != NULL\n                        && rr[num_recs].type != SSL3_RT_APPLICATION_DATA) {\n                    SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_RECORD_TYPE);\n                    al = SSL_AD_UNEXPECTED_MESSAGE;\n                    goto f_err;\n                }\n                if (rr[num_recs].length >\n                    SSL3_BUFFER_get_len(rbuf) - SSL3_RT_HEADER_LENGTH) {\n                    al = SSL_AD_RECORD_OVERFLOW;\n                    SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_PACKET_LENGTH_TOO_LONG);\n                    goto f_err;\n                }\n            }\n        }\n        if (rr[num_recs].rec_version == SSL2_VERSION) {\n            more = rr[num_recs].length + SSL2_RT_HEADER_LENGTH\n                - SSL3_RT_HEADER_LENGTH;\n        } else {\n            more = rr[num_recs].length;\n        }\n        if (more > 0) {\n            rret = ssl3_read_n(s, more, more, 1, 0, &n);\n            if (rret <= 0)\n                return rret;\n        }\n        RECORD_LAYER_set_rstate(&s->rlayer, SSL_ST_READ_HEADER);\n        if (rr[num_recs].rec_version == SSL2_VERSION) {\n            rr[num_recs].input =\n                &(RECORD_LAYER_get_packet(&s->rlayer)[SSL2_RT_HEADER_LENGTH]);\n        } else {\n            rr[num_recs].input =\n                &(RECORD_LAYER_get_packet(&s->rlayer)[SSL3_RT_HEADER_LENGTH]);\n        }\n        if (rr[num_recs].length > SSL3_RT_MAX_ENCRYPTED_LENGTH) {\n            al = SSL_AD_RECORD_OVERFLOW;\n            SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_ENCRYPTED_LENGTH_TOO_LONG);\n            goto f_err;\n        }\n        rr[num_recs].data = rr[num_recs].input;\n        rr[num_recs].orig_len = rr[num_recs].length;\n        rr[num_recs].read = 0;\n        num_recs++;\n        RECORD_LAYER_reset_packet_length(&s->rlayer);\n        RECORD_LAYER_clear_first_record(&s->rlayer);\n    } while (num_recs < max_recs\n             && rr[num_recs - 1].type == SSL3_RT_APPLICATION_DATA\n             && SSL_USE_EXPLICIT_IV(s)\n             && s->enc_read_ctx != NULL\n             && (EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_read_ctx))\n                 & EVP_CIPH_FLAG_PIPELINE)\n             && ssl3_record_app_data_waiting(s));\n    if (SSL_USE_ETM(s) && s->read_hash) {\n        unsigned char *mac;\n        imac_size = EVP_MD_CTX_size(s->read_hash);\n        if (imac_size < 0) {\n                al = SSL_AD_INTERNAL_ERROR;\n                SSLerr(SSL_F_SSL3_GET_RECORD, ERR_LIB_EVP);\n                goto f_err;\n        }\n        mac_size = (size_t)imac_size;\n        OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);\n        for (j = 0; j < num_recs; j++) {\n            if (rr[j].length < mac_size) {\n                al = SSL_AD_DECODE_ERROR;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);\n                goto f_err;\n            }\n            rr[j].length -= mac_size;\n            mac = rr[j].data + rr[j].length;\n            i = s->method->ssl3_enc->mac(s, &rr[j], md, 0   );\n            if (i == 0 || CRYPTO_memcmp(md, mac, mac_size) != 0) {\n                al = SSL_AD_BAD_RECORD_MAC;\n                SSLerr(SSL_F_SSL3_GET_RECORD,\n                       SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);\n                goto f_err;\n            }\n        }\n    }\n    enc_err = s->method->ssl3_enc->enc(s, rr, num_recs, 0);\n    if (enc_err == 0) {\n        al = SSL_AD_DECRYPTION_FAILED;\n        SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);\n        goto f_err;\n    }\n#ifdef SSL_DEBUG\n    printf("dec %"OSSLzu"\\n", rr->length);\n    {\n        size_t z;\n        for (z = 0; z < rr->length; z++)\n            printf("%02X%c", rr->data[z], ((z + 1) % 16) ? \' \' : \'\\n\');\n    }\n    printf("\\n");\n#endif\n    if ((sess != NULL) &&\n        (s->enc_read_ctx != NULL) &&\n        (EVP_MD_CTX_md(s->read_hash) != NULL) && !SSL_USE_ETM(s)) {\n        unsigned char *mac = NULL;\n        unsigned char mac_tmp[EVP_MAX_MD_SIZE];\n        mac_size = EVP_MD_CTX_size(s->read_hash);\n        OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);\n        for (j = 0; j < num_recs; j++) {\n            if (rr[j].orig_len < mac_size ||\n                (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE &&\n                 rr[j].orig_len < mac_size + 1)) {\n                al = SSL_AD_DECODE_ERROR;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_LENGTH_TOO_SHORT);\n                goto f_err;\n            }\n            if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE) {\n                mac = mac_tmp;\n                ssl3_cbc_copy_mac(mac_tmp, &rr[j], mac_size);\n                rr[j].length -= mac_size;\n            } else {\n                rr[j].length -= mac_size;\n                mac = &rr[j].data[rr[j].length];\n            }\n            i = s->method->ssl3_enc->mac(s, &rr[j], md, 0   );\n            if (i == 0 || mac == NULL\n                || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0)\n                enc_err = -1;\n            if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH + mac_size)\n                enc_err = -1;\n        }\n    }\n    if (enc_err < 0) {\n        al = SSL_AD_BAD_RECORD_MAC;\n        SSLerr(SSL_F_SSL3_GET_RECORD,\n               SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);\n        goto f_err;\n    }\n    for (j = 0; j < num_recs; j++) {\n        if (s->expand != NULL) {\n            if (rr[j].length > SSL3_RT_MAX_COMPRESSED_LENGTH) {\n                al = SSL_AD_RECORD_OVERFLOW;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_COMPRESSED_LENGTH_TOO_LONG);\n                goto f_err;\n            }\n            if (!ssl3_do_uncompress(s, &rr[j])) {\n                al = SSL_AD_DECOMPRESSION_FAILURE;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_DECOMPRESSION);\n                goto f_err;\n            }\n        }\n        if (SSL_IS_TLS13(s) && s->enc_read_ctx != NULL) {\n            size_t end;\n            if (rr[j].length == 0) {\n                al = SSL_AD_UNEXPECTED_MESSAGE;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_RECORD_TYPE);\n                goto f_err;\n            }\n            for (end = rr[j].length - 1; end > 0 && rr[j].data[end] == 0; end--)\n                continue;\n            rr[j].length = end;\n            rr[j].type = rr[j].data[end];\n            if (rr[j].type != SSL3_RT_APPLICATION_DATA\n                    && rr[j].type != SSL3_RT_ALERT\n                    && rr[j].type != SSL3_RT_HANDSHAKE) {\n                al = SSL_AD_UNEXPECTED_MESSAGE;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_BAD_RECORD_TYPE);\n                goto f_err;\n            }\n        }\n        if (rr[j].length > SSL3_RT_MAX_PLAIN_LENGTH) {\n            al = SSL_AD_RECORD_OVERFLOW;\n            SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_DATA_LENGTH_TOO_LONG);\n            goto f_err;\n        }\n        rr[j].off = 0;\n        if (rr[j].length == 0) {\n            RECORD_LAYER_inc_empty_record_count(&s->rlayer);\n            if (RECORD_LAYER_get_empty_record_count(&s->rlayer)\n                > MAX_EMPTY_RECORDS) {\n                al = SSL_AD_UNEXPECTED_MESSAGE;\n                SSLerr(SSL_F_SSL3_GET_RECORD, SSL_R_RECORD_TOO_SMALL);\n                goto f_err;\n            }\n        } else {\n            RECORD_LAYER_reset_empty_record_count(&s->rlayer);\n        }\n    }\n    RECORD_LAYER_set_numrpipes(&s->rlayer, num_recs);\n    return 1;\n f_err:\n    ssl3_send_alert(s, SSL3_AL_FATAL, al);\n err:\n    return ret;\n}', 'void ssl3_cbc_copy_mac(unsigned char *out,\n                       const SSL3_RECORD *rec, size_t md_size)\n{\n#if defined(CBC_MAC_ROTATE_IN_PLACE)\n    unsigned char rotated_mac_buf[64 + EVP_MAX_MD_SIZE];\n    unsigned char *rotated_mac;\n#else\n    unsigned char rotated_mac[EVP_MAX_MD_SIZE];\n#endif\n    size_t mac_end = rec->length;\n    size_t mac_start = mac_end - md_size;\n    size_t scan_start = 0;\n    size_t i, j;\n    size_t div_spoiler;\n    size_t rotate_offset;\n    OPENSSL_assert(rec->orig_len >= md_size);\n    OPENSSL_assert(md_size <= EVP_MAX_MD_SIZE);\n#if defined(CBC_MAC_ROTATE_IN_PLACE)\n    rotated_mac = rotated_mac_buf + ((0 - (size_t)rotated_mac_buf) & 63);\n#endif\n    if (rec->orig_len > md_size + 255 + 1)\n        scan_start = rec->orig_len - (md_size + 255 + 1);\n    div_spoiler = md_size >> 1;\n    div_spoiler <<= (sizeof(div_spoiler) - 1) * 8;\n    rotate_offset = (div_spoiler + mac_start - scan_start) % md_size;\n    memset(rotated_mac, 0, md_size);\n    for (i = scan_start, j = 0; i < rec->orig_len; i++) {\n        unsigned char mac_started = constant_time_ge_8_s(i, mac_start);\n        unsigned char mac_ended = constant_time_ge_8_s(i, mac_end);\n        unsigned char b = rec->data[i];\n        rotated_mac[j++] |= b & mac_started & ~mac_ended;\n        j &= constant_time_lt_s(j, md_size);\n    }\n#if defined(CBC_MAC_ROTATE_IN_PLACE)\n    j = 0;\n    for (i = 0; i < md_size; i++) {\n        ((volatile unsigned char *)rotated_mac)[rotate_offset ^ 32];\n        out[j++] = rotated_mac[rotate_offset++];\n        rotate_offset &= constant_time_lt_s(rotate_offset, md_size);\n    }\n#else\n    memset(out, 0, md_size);\n    rotate_offset = md_size - rotate_offset;\n    rotate_offset &= constant_time_lt_s(rotate_offset, md_size);\n    for (i = 0; i < md_size; i++) {\n        for (j = 0; j < md_size; j++)\n            out[j] |= rotated_mac[i] & constant_time_eq_8_s(j, rotate_offset);\n        rotate_offset++;\n        rotate_offset &= constant_time_lt_s(rotate_offset, md_size);\n    }\n#endif\n}']