ssl/tls13_enc.c:353: error: BUFFER_OVERRUN_L3
  Offset added: [31, +oo] (⇐ [0, +oo] + [31, 33]) Size: [1, 2147483644] by call to `tls13_derive_secret`.
Showing all 15 steps of the trace


ssl/tls13_enc.c:333:13: Assignment
331.               finsecretlen = sizeof(s->client_finished_secret);
332.               label = client_handshake_traffic;
333.               labellen = sizeof(client_handshake_traffic) - 1;
                   ^
334.           } else {
335.               insecret = s->session->master_key;

ssl/tls13_enc.c:353:10: Call
351.       }
352.   
353.       if (!tls13_derive_secret(s, insecret, label, labellen, secret)) {
                ^
354.           SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
355.           goto err;

ssl/tls13_enc.c:83:1: Parameter `labellen`
  81.    * success  0 on failure.
  82.    */
  83. > int tls13_derive_secret(SSL *s, const unsigned char *insecret,
  84.                           const unsigned char *label, size_t labellen,
  85.                           unsigned char *secret)

ssl/tls13_enc.c:96:12: Call
  94.           return 0;
  95.   
  96.       return tls13_hkdf_expand(s, insecret, label, labellen, hash, secret,
                   ^
  97.                                hashlen);
  98.   }

ssl/tls13_enc.c:26:1: Parameter `labellen`
    24.    * success  0 on failure.
    25.    */
    26. > static int tls13_hkdf_expand(SSL *s, const unsigned char *secret,
    27.                                const unsigned char *label, size_t labellen,
    28.                                const unsigned char *hash,

ssl/tls13_enc.c:55:17: Call
    53.               || !WPACKET_start_sub_packet_u8(&pkt)
    54.               || !WPACKET_memcpy(&pkt, label_prefix, sizeof(label_prefix) - 1)
    55.               || !WPACKET_memcpy(&pkt, label, labellen)
                          ^
    56.               || !WPACKET_close(&pkt)
    57.               || !WPACKET_sub_memcpy_u8(&pkt, hash, (hash == NULL) ? 0 : hashlen)

ssl/packet.c:329:1: <Offset trace>
327.   }
328.   
329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
330.   {
331.       unsigned char *dest;

ssl/packet.c:329:1: Parameter `len`
      327.   }
      328.   
      329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
      330.   {
      331.       unsigned char *dest;

ssl/packet.c:329:1: <Length trace>
327.   }
328.   
329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
330.   {
331.       unsigned char *dest;

ssl/packet.c:329:1: Parameter `*pkt->buf->data`
      327.   }
      328.   
      329. > int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
      330.   {
      331.       unsigned char *dest;

ssl/packet.c:336:10: Call
      334.           return 1;
      335.   
      336.       if (!WPACKET_allocate_bytes(pkt, len, &dest))
                      ^
      337.           return 0;
      338.   

ssl/packet.c:15:1: Parameter `**allocbytes`
        13.   #define DEFAULT_BUF_SIZE    256
        14.   
        15. > int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
        16.   {
        17.       if (!WPACKET_reserve_bytes(pkt, len, allocbytes))

ssl/packet.c:17:10: Call
        15.   int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
        16.   {
        17.       if (!WPACKET_reserve_bytes(pkt, len, allocbytes))
                       ^
        18.           return 0;
        19.   

ssl/packet.c:39:1: Parameter `**allocbytes`
          37.                        ? (p)->staticbuf : (unsigned char *)(p)->buf->data)
          38.   
          39. > int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)
          40.   {
          41.       /* Internal API, so should not fail */

ssl/packet.c:339:5: Array access: Offset added: [31, +oo] (⇐ [0, +oo] + [31, 33]) Size: [1, 2147483644] by call to `tls13_derive_secret` 
      337.           return 0;
      338.   
      339.       memcpy(dest, src, len);
                 ^
      340.   
      341.       return 1;

int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
{
    unsigned char *dest;
    if (len == 0)
        return 1;
    if (!WPACKET_allocate_bytes(pkt, len, &dest))
        return 0;
    memcpy(dest, src, len);
    return 1;
}
['int tls13_change_cipher_state(SSL *s, int which)\n{\n    static const unsigned char client_handshake_traffic[] =\n        "client handshake traffic secret";\n    static const unsigned char client_application_traffic[] =\n        "client application traffic secret";\n    static const unsigned char server_handshake_traffic[] =\n        "server handshake traffic secret";\n    static const unsigned char server_application_traffic[] =\n        "server application traffic secret";\n    unsigned char key[EVP_MAX_KEY_LENGTH];\n    unsigned char iv[EVP_MAX_IV_LENGTH];\n    unsigned char secret[EVP_MAX_MD_SIZE];\n    unsigned char *insecret;\n    unsigned char *finsecret = NULL;\n    EVP_CIPHER_CTX *ciph_ctx;\n    const EVP_CIPHER *ciph = s->s3->tmp.new_sym_enc;;\n    size_t ivlen, keylen, finsecretlen;\n    const unsigned char *label;\n    size_t labellen;\n    int ret = 0;\n    if (which & SSL3_CC_READ) {\n        if (s->enc_read_ctx != NULL) {\n            EVP_CIPHER_CTX_reset(s->enc_read_ctx);\n        } else {\n            s->enc_read_ctx = EVP_CIPHER_CTX_new();\n            if (s->enc_read_ctx == NULL) {\n                SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);\n                goto err;\n            }\n        }\n        ciph_ctx = s->enc_read_ctx;\n        RECORD_LAYER_reset_read_sequence(&s->rlayer);\n    } else {\n        if (s->enc_write_ctx != NULL) {\n            EVP_CIPHER_CTX_reset(s->enc_write_ctx);\n        } else {\n            s->enc_write_ctx = EVP_CIPHER_CTX_new();\n            if (s->enc_write_ctx == NULL) {\n                SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);\n                goto err;\n            }\n        }\n        ciph_ctx = s->enc_write_ctx;\n        RECORD_LAYER_reset_write_sequence(&s->rlayer);\n    }\n    if (((which & SSL3_CC_CLIENT) && (which & SSL3_CC_WRITE))\n            || ((which & SSL3_CC_SERVER) && (which & SSL3_CC_READ))) {\n        if (which & SSL3_CC_HANDSHAKE) {\n            insecret = s->handshake_secret;\n            finsecret = s->client_finished_secret;\n            finsecretlen = sizeof(s->client_finished_secret);\n            label = client_handshake_traffic;\n            labellen = sizeof(client_handshake_traffic) - 1;\n        } else {\n            insecret = s->session->master_key;\n            label = client_application_traffic;\n            labellen = sizeof(client_application_traffic) - 1;\n        }\n    } else {\n        if (which & SSL3_CC_HANDSHAKE) {\n            insecret = s->handshake_secret;\n            finsecret = s->server_finished_secret;\n            finsecretlen = sizeof(s->server_finished_secret);\n            label = server_handshake_traffic;\n            labellen = sizeof(server_handshake_traffic) - 1;\n        } else {\n            insecret = s->session->master_key;\n            label = server_application_traffic;\n            labellen = sizeof(server_application_traffic) - 1;\n        }\n    }\n    if (!tls13_derive_secret(s, insecret, label, labellen, secret)) {\n        SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n    keylen = EVP_CIPHER_key_length(ciph);\n    if (EVP_CIPHER_mode(ciph) == EVP_CIPH_GCM_MODE)\n        ivlen = EVP_GCM_TLS_FIXED_IV_LEN;\n    else if (EVP_CIPHER_mode(ciph) == EVP_CIPH_CCM_MODE)\n        ivlen = EVP_CCM_TLS_FIXED_IV_LEN;\n    else\n        ivlen = EVP_CIPHER_iv_length(ciph);\n    if (!tls13_derive_key(s, secret, key, keylen)\n            || !tls13_derive_iv(s, secret, iv, ivlen)\n            || (finsecret != NULL && !tls13_derive_finishedkey(s, secret,\n                                                               finsecret,\n                                                               finsecretlen))) {\n        SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n    if (EVP_CIPHER_mode(ciph) == EVP_CIPH_GCM_MODE) {\n        if (!EVP_CipherInit_ex(ciph_ctx, ciph, NULL, key, NULL,\n                               (which & SSL3_CC_WRITE))\n                || !EVP_CIPHER_CTX_ctrl(ciph_ctx, EVP_CTRL_GCM_SET_IV_FIXED,\n                                        (int)ivlen, iv)) {\n            SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_EVP_LIB);\n            goto err;\n        }\n    } else if (EVP_CIPHER_mode(ciph) == EVP_CIPH_CCM_MODE) {\n        int taglen;\n        if (s->s3->tmp.new_cipher->algorithm_enc\n                & (SSL_AES128CCM8 | SSL_AES256CCM8))\n            taglen = 8;\n        else\n            taglen = 16;\n        if (!EVP_CipherInit_ex(ciph_ctx, ciph, NULL, NULL, NULL,\n                               (which & SSL3_CC_WRITE))\n                || !EVP_CIPHER_CTX_ctrl(ciph_ctx, EVP_CTRL_AEAD_SET_IVLEN, 12,\n                                        NULL)\n                || !EVP_CIPHER_CTX_ctrl(ciph_ctx, EVP_CTRL_AEAD_SET_TAG, taglen,\n                                        NULL)\n                || !EVP_CIPHER_CTX_ctrl(ciph_ctx, EVP_CTRL_CCM_SET_IV_FIXED,\n                                        (int)ivlen, iv)\n                || !EVP_CipherInit_ex(ciph_ctx, NULL, NULL, key, NULL, -1)) {\n            SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_EVP_LIB);\n            goto err;\n        }\n    } else {\n        if (!EVP_CipherInit_ex(ciph_ctx, ciph, NULL, key, iv,\n                               (which & SSL3_CC_WRITE))) {\n            SSLerr(SSL_F_TLS13_CHANGE_CIPHER_STATE, ERR_R_EVP_LIB);\n            goto err;\n        }\n    }\n#ifdef OPENSSL_SSL_TRACE_CRYPTO\n    if (s->msg_callback) {\n        int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;\n        if (ciph->key_len)\n            s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,\n                            key, ciph->key_len, s, s->msg_callback_arg);\n        if (ivlen) {\n            if (EVP_CIPHER_mode(ciph) == EVP_CIPH_GCM_MODE)\n                wh |= TLS1_RT_CRYPTO_FIXED_IV;\n            else\n                wh |= TLS1_RT_CRYPTO_IV;\n            s->msg_callback(2, s->version, wh, iv, ivlen, s,\n                            s->msg_callback_arg);\n        }\n    }\n#endif\n    ret = 1;\n err:\n    OPENSSL_cleanse(secret, sizeof(secret));\n    OPENSSL_cleanse(key, sizeof(key));\n    OPENSSL_cleanse(iv, sizeof(iv));\n    return ret;\n}', 'int tls13_derive_secret(SSL *s, const unsigned char *insecret,\n                        const unsigned char *label, size_t labellen,\n                        unsigned char *secret)\n{\n    unsigned char hash[EVP_MAX_MD_SIZE];\n    size_t hashlen;\n    if (!ssl3_digest_cached_records(s, 1))\n        return 0;\n    if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen))\n        return 0;\n    return tls13_hkdf_expand(s, insecret, label, labellen, hash, secret,\n                             hashlen);\n}', 'static int tls13_hkdf_expand(SSL *s, const unsigned char *secret,\n                             const unsigned char *label, size_t labellen,\n                             const unsigned char *hash,\n                             unsigned char *out, size_t outlen)\n{\n    const unsigned char label_prefix[] = "TLS 1.3, ";\n    const EVP_MD *md = ssl_handshake_md(s);\n    EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);\n    int ret;\n    size_t hkdflabellen;\n    size_t hashlen;\n    unsigned char hkdflabel[sizeof(uint16_t) + sizeof(uint8_t) +\n                            + sizeof(label_prefix) + TLS13_MAX_LABEL_LEN\n                            + EVP_MAX_MD_SIZE];\n    WPACKET pkt;\n    if (pctx == NULL)\n        return 0;\n    hashlen = EVP_MD_size(md);\n    if (!WPACKET_init_static_len(&pkt, hkdflabel, sizeof(hkdflabel), 0)\n            || !WPACKET_put_bytes_u16(&pkt, outlen)\n            || !WPACKET_start_sub_packet_u8(&pkt)\n            || !WPACKET_memcpy(&pkt, label_prefix, sizeof(label_prefix) - 1)\n            || !WPACKET_memcpy(&pkt, label, labellen)\n            || !WPACKET_close(&pkt)\n            || !WPACKET_sub_memcpy_u8(&pkt, hash, (hash == NULL) ? 0 : hashlen)\n            || !WPACKET_get_total_written(&pkt, &hkdflabellen)\n            || !WPACKET_finish(&pkt)) {\n        WPACKET_cleanup(&pkt);\n        return 0;\n    }\n    ret = EVP_PKEY_derive_init(pctx) <= 0\n            || EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY)\n               <= 0\n            || EVP_PKEY_CTX_set_hkdf_md(pctx, md) <= 0\n            || EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, hashlen) <= 0\n            || EVP_PKEY_CTX_add1_hkdf_info(pctx, hkdflabel, hkdflabellen) <= 0\n            || EVP_PKEY_derive(pctx, out, &outlen) <= 0;\n    EVP_PKEY_CTX_free(pctx);\n    return ret == 0;\n}', 'int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)\n{\n    unsigned char *dest;\n    if (len == 0)\n        return 1;\n    if (!WPACKET_allocate_bytes(pkt, len, &dest))\n        return 0;\n    memcpy(dest, src, len);\n    return 1;\n}', 'int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)\n{\n    if (!WPACKET_reserve_bytes(pkt, len, allocbytes))\n        return 0;\n    pkt->written += len;\n    pkt->curr += len;\n    return 1;\n}', 'int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)\n{\n    assert(pkt->subs != NULL && len != 0);\n    if (pkt->subs == NULL || len == 0)\n        return 0;\n    if (pkt->maxsize - pkt->written < len)\n        return 0;\n    if (pkt->staticbuf == NULL && (pkt->buf->length - pkt->written < len)) {\n        size_t newlen;\n        size_t reflen;\n        reflen = (len > pkt->buf->length) ? len : pkt->buf->length;\n        if (reflen > SIZE_MAX / 2) {\n            newlen = SIZE_MAX;\n        } else {\n            newlen = reflen * 2;\n            if (newlen < DEFAULT_BUF_SIZE)\n                newlen = DEFAULT_BUF_SIZE;\n        }\n        if (BUF_MEM_grow(pkt->buf, newlen) == 0)\n            return 0;\n    }\n    *allocbytes = GETBUF(pkt) + pkt->curr;\n    return 1;\n}']