Mercurial > hg > nginx-quic
view src/mail/ngx_mail_parse.c @ 4794:4163fb9dcfcb
Explicitly ignore returned value from unlink() in ngx_open_tempfile().
The only thing we could potentially do here in case of error
returned is to complain to error log, but we don't have log
structure available here due to interface limitations.
Prodded by Coverity.
author | Andrey Belov <defan@nginx.com> |
---|---|
date | Mon, 06 Aug 2012 16:06:59 +0000 |
parents | 4c36e15651f7 |
children | b6562f98bfd8 |
line wrap: on
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_mail.h> #include <ngx_mail_pop3_module.h> #include <ngx_mail_imap_module.h> #include <ngx_mail_smtp_module.h> ngx_int_t ngx_mail_pop3_parse_command(ngx_mail_session_t *s) { u_char ch, *p, *c, c0, c1, c2, c3; ngx_str_t *arg; enum { sw_start = 0, sw_spaces_before_argument, sw_argument, sw_almost_done } state; state = s->state; for (p = s->buffer->pos; p < s->buffer->last; p++) { ch = *p; switch (state) { /* POP3 command */ case sw_start: if (ch == ' ' || ch == CR || ch == LF) { c = s->buffer->start; if (p - c == 4) { c0 = ngx_toupper(c[0]); c1 = ngx_toupper(c[1]); c2 = ngx_toupper(c[2]); c3 = ngx_toupper(c[3]); if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R') { s->command = NGX_POP3_USER; } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S') { s->command = NGX_POP3_PASS; } else if (c0 == 'A' && c1 == 'P' && c2 == 'O' && c3 == 'P') { s->command = NGX_POP3_APOP; } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T') { s->command = NGX_POP3_QUIT; } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A') { s->command = NGX_POP3_CAPA; } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H') { s->command = NGX_POP3_AUTH; } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P') { s->command = NGX_POP3_NOOP; #if (NGX_MAIL_SSL) } else if (c0 == 'S' && c1 == 'T' && c2 == 'L' && c3 == 'S') { s->command = NGX_POP3_STLS; #endif } else { goto invalid; } } else { goto invalid; } switch (ch) { case ' ': state = sw_spaces_before_argument; break; case CR: state = sw_almost_done; break; case LF: goto done; } break; } if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { goto invalid; } break; case sw_spaces_before_argument: switch (ch) { case ' ': break; case CR: state = sw_almost_done; s->arg_end = p; break; case LF: s->arg_end = p; goto done; default: if (s->args.nelts <= 2) { state = sw_argument; s->arg_start = p; break; } goto invalid; } break; case sw_argument: switch (ch) { case ' ': /* * the space should be considered as part of the at username * or password, but not of argument in other commands */ if (s->command == NGX_POP3_USER || s->command == NGX_POP3_PASS) { break; } /* fall through */ case CR: case LF: arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = p - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; switch (ch) { case ' ': state = sw_spaces_before_argument; break; case CR: state = sw_almost_done; break; case LF: goto done; } break; default: break; } break; case sw_almost_done: switch (ch) { case LF: goto done; default: goto invalid; } } } s->buffer->pos = p; s->state = state; return NGX_AGAIN; done: s->buffer->pos = p + 1; if (s->arg_start) { arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = s->arg_end - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; } s->state = (s->command != NGX_POP3_AUTH) ? sw_start : sw_argument; return NGX_OK; invalid: s->state = sw_start; s->arg_start = NULL; return NGX_MAIL_PARSE_INVALID_COMMAND; } ngx_int_t ngx_mail_imap_parse_command(ngx_mail_session_t *s) { u_char ch, *p, *c; ngx_str_t *arg; enum { sw_start = 0, sw_spaces_before_command, sw_command, sw_spaces_before_argument, sw_argument, sw_backslash, sw_literal, sw_no_sync_literal_argument, sw_start_literal_argument, sw_literal_argument, sw_end_literal_argument, sw_almost_done } state; state = s->state; for (p = s->buffer->pos; p < s->buffer->last; p++) { ch = *p; switch (state) { /* IMAP tag */ case sw_start: switch (ch) { case ' ': s->tag.len = p - s->buffer->start + 1; s->tag.data = s->buffer->start; state = sw_spaces_before_command; break; case CR: s->state = sw_start; return NGX_MAIL_PARSE_INVALID_COMMAND; case LF: s->state = sw_start; return NGX_MAIL_PARSE_INVALID_COMMAND; } break; case sw_spaces_before_command: switch (ch) { case ' ': break; case CR: s->state = sw_start; return NGX_MAIL_PARSE_INVALID_COMMAND; case LF: s->state = sw_start; return NGX_MAIL_PARSE_INVALID_COMMAND; default: s->cmd_start = p; state = sw_command; break; } break; case sw_command: if (ch == ' ' || ch == CR || ch == LF) { c = s->cmd_start; switch (p - c) { case 4: if ((c[0] == 'N' || c[0] == 'n') && (c[1] == 'O'|| c[1] == 'o') && (c[2] == 'O'|| c[2] == 'o') && (c[3] == 'P'|| c[3] == 'p')) { s->command = NGX_IMAP_NOOP; } else { goto invalid; } break; case 5: if ((c[0] == 'L'|| c[0] == 'l') && (c[1] == 'O'|| c[1] == 'o') && (c[2] == 'G'|| c[2] == 'g') && (c[3] == 'I'|| c[3] == 'i') && (c[4] == 'N'|| c[4] == 'n')) { s->command = NGX_IMAP_LOGIN; } else { goto invalid; } break; case 6: if ((c[0] == 'L'|| c[0] == 'l') && (c[1] == 'O'|| c[1] == 'o') && (c[2] == 'G'|| c[2] == 'g') && (c[3] == 'O'|| c[3] == 'o') && (c[4] == 'U'|| c[4] == 'u') && (c[5] == 'T'|| c[5] == 't')) { s->command = NGX_IMAP_LOGOUT; } else { goto invalid; } break; #if (NGX_MAIL_SSL) case 8: if ((c[0] == 'S'|| c[0] == 's') && (c[1] == 'T'|| c[1] == 't') && (c[2] == 'A'|| c[2] == 'a') && (c[3] == 'R'|| c[3] == 'r') && (c[4] == 'T'|| c[4] == 't') && (c[5] == 'T'|| c[5] == 't') && (c[6] == 'L'|| c[6] == 'l') && (c[7] == 'S'|| c[7] == 's')) { s->command = NGX_IMAP_STARTTLS; } else { goto invalid; } break; #endif case 10: if ((c[0] == 'C'|| c[0] == 'c') && (c[1] == 'A'|| c[1] == 'a') && (c[2] == 'P'|| c[2] == 'p') && (c[3] == 'A'|| c[3] == 'a') && (c[4] == 'B'|| c[4] == 'b') && (c[5] == 'I'|| c[5] == 'i') && (c[6] == 'L'|| c[6] == 'l') && (c[7] == 'I'|| c[7] == 'i') && (c[8] == 'T'|| c[8] == 't') && (c[9] == 'Y'|| c[9] == 'y')) { s->command = NGX_IMAP_CAPABILITY; } else { goto invalid; } break; case 12: if ((c[0] == 'A'|| c[0] == 'a') && (c[1] == 'U'|| c[1] == 'u') && (c[2] == 'T'|| c[2] == 't') && (c[3] == 'H'|| c[3] == 'h') && (c[4] == 'E'|| c[4] == 'e') && (c[5] == 'N'|| c[5] == 'n') && (c[6] == 'T'|| c[6] == 't') && (c[7] == 'I'|| c[7] == 'i') && (c[8] == 'C'|| c[8] == 'c') && (c[9] == 'A'|| c[9] == 'a') && (c[10] == 'T'|| c[10] == 't') && (c[11] == 'E'|| c[11] == 'e')) { s->command = NGX_IMAP_AUTHENTICATE; } else { goto invalid; } break; default: goto invalid; } switch (ch) { case ' ': state = sw_spaces_before_argument; break; case CR: state = sw_almost_done; break; case LF: goto done; } break; } if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { goto invalid; } break; case sw_spaces_before_argument: switch (ch) { case ' ': break; case CR: state = sw_almost_done; s->arg_end = p; break; case LF: s->arg_end = p; goto done; case '"': if (s->args.nelts <= 2) { s->quoted = 1; s->arg_start = p + 1; state = sw_argument; break; } goto invalid; case '{': if (s->args.nelts <= 2) { state = sw_literal; break; } goto invalid; default: if (s->args.nelts <= 2) { s->arg_start = p; state = sw_argument; break; } goto invalid; } break; case sw_argument: if (ch == ' ' && s->quoted) { break; } switch (ch) { case '"': if (!s->quoted) { break; } s->quoted = 0; /* fall through */ case ' ': case CR: case LF: arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = p - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; switch (ch) { case '"': case ' ': state = sw_spaces_before_argument; break; case CR: state = sw_almost_done; break; case LF: goto done; } break; case '\\': if (s->quoted) { s->backslash = 1; state = sw_backslash; } break; } break; case sw_backslash: switch (ch) { case CR: case LF: goto invalid; default: state = sw_argument; } break; case sw_literal: if (ch >= '0' && ch <= '9') { s->literal_len = s->literal_len * 10 + (ch - '0'); break; } if (ch == '}') { state = sw_start_literal_argument; break; } if (ch == '+') { state = sw_no_sync_literal_argument; break; } goto invalid; case sw_no_sync_literal_argument: if (ch == '}') { s->no_sync_literal = 1; state = sw_start_literal_argument; break; } goto invalid; case sw_start_literal_argument: switch (ch) { case CR: break; case LF: s->buffer->pos = p + 1; s->arg_start = p + 1; if (s->no_sync_literal == 0) { s->state = sw_literal_argument; return NGX_IMAP_NEXT; } state = sw_literal_argument; s->no_sync_literal = 0; break; default: goto invalid; } break; case sw_literal_argument: if (s->literal_len && --s->literal_len) { break; } arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = p + 1 - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; state = sw_end_literal_argument; break; case sw_end_literal_argument: switch (ch) { case '{': if (s->args.nelts <= 2) { state = sw_literal; break; } goto invalid; case CR: state = sw_almost_done; break; case LF: goto done; default: state = sw_spaces_before_argument; break; } break; case sw_almost_done: switch (ch) { case LF: goto done; default: goto invalid; } } } s->buffer->pos = p; s->state = state; return NGX_AGAIN; done: s->buffer->pos = p + 1; if (s->arg_start) { arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = s->arg_end - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; s->cmd_start = NULL; s->quoted = 0; s->no_sync_literal = 0; s->literal_len = 0; } s->state = (s->command != NGX_IMAP_AUTHENTICATE) ? sw_start : sw_argument; return NGX_OK; invalid: s->state = sw_start; s->quoted = 0; s->no_sync_literal = 0; s->literal_len = 0; return NGX_MAIL_PARSE_INVALID_COMMAND; } ngx_int_t ngx_mail_smtp_parse_command(ngx_mail_session_t *s) { u_char ch, *p, *c, c0, c1, c2, c3; ngx_str_t *arg; enum { sw_start = 0, sw_spaces_before_argument, sw_argument, sw_almost_done } state; state = s->state; for (p = s->buffer->pos; p < s->buffer->last; p++) { ch = *p; switch (state) { /* SMTP command */ case sw_start: if (ch == ' ' || ch == CR || ch == LF) { c = s->buffer->start; if (p - c == 4) { c0 = ngx_toupper(c[0]); c1 = ngx_toupper(c[1]); c2 = ngx_toupper(c[2]); c3 = ngx_toupper(c[3]); if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'O') { s->command = NGX_SMTP_HELO; } else if (c0 == 'E' && c1 == 'H' && c2 == 'L' && c3 == 'O') { s->command = NGX_SMTP_EHLO; } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T') { s->command = NGX_SMTP_QUIT; } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H') { s->command = NGX_SMTP_AUTH; } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P') { s->command = NGX_SMTP_NOOP; } else if (c0 == 'M' && c1 == 'A' && c2 == 'I' && c3 == 'L') { s->command = NGX_SMTP_MAIL; } else if (c0 == 'R' && c1 == 'S' && c2 == 'E' && c3 == 'T') { s->command = NGX_SMTP_RSET; } else if (c0 == 'R' && c1 == 'C' && c2 == 'P' && c3 == 'T') { s->command = NGX_SMTP_RCPT; } else if (c0 == 'V' && c1 == 'R' && c2 == 'F' && c3 == 'Y') { s->command = NGX_SMTP_VRFY; } else if (c0 == 'E' && c1 == 'X' && c2 == 'P' && c3 == 'N') { s->command = NGX_SMTP_EXPN; } else if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'P') { s->command = NGX_SMTP_HELP; } else { goto invalid; } #if (NGX_MAIL_SSL) } else if (p - c == 8) { if ((c[0] == 'S'|| c[0] == 's') && (c[1] == 'T'|| c[1] == 't') && (c[2] == 'A'|| c[2] == 'a') && (c[3] == 'R'|| c[3] == 'r') && (c[4] == 'T'|| c[4] == 't') && (c[5] == 'T'|| c[5] == 't') && (c[6] == 'L'|| c[6] == 'l') && (c[7] == 'S'|| c[7] == 's')) { s->command = NGX_SMTP_STARTTLS; } else { goto invalid; } #endif } else { goto invalid; } switch (ch) { case ' ': state = sw_spaces_before_argument; break; case CR: state = sw_almost_done; break; case LF: goto done; } break; } if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { goto invalid; } break; case sw_spaces_before_argument: switch (ch) { case ' ': break; case CR: state = sw_almost_done; s->arg_end = p; break; case LF: s->arg_end = p; goto done; default: if (s->args.nelts <= 10) { state = sw_argument; s->arg_start = p; break; } goto invalid; } break; case sw_argument: switch (ch) { case ' ': case CR: case LF: arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = p - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; switch (ch) { case ' ': state = sw_spaces_before_argument; break; case CR: state = sw_almost_done; break; case LF: goto done; } break; default: break; } break; case sw_almost_done: switch (ch) { case LF: goto done; default: goto invalid; } } } s->buffer->pos = p; s->state = state; return NGX_AGAIN; done: s->buffer->pos = p + 1; if (s->arg_start) { arg = ngx_array_push(&s->args); if (arg == NULL) { return NGX_ERROR; } arg->len = s->arg_end - s->arg_start; arg->data = s->arg_start; s->arg_start = NULL; } s->state = (s->command != NGX_SMTP_AUTH) ? sw_start : sw_argument; return NGX_OK; invalid: s->state = sw_start; s->arg_start = NULL; return NGX_MAIL_PARSE_INVALID_COMMAND; } ngx_int_t ngx_mail_auth_parse(ngx_mail_session_t *s, ngx_connection_t *c) { ngx_str_t *arg; #if (NGX_MAIL_SSL) if (ngx_mail_starttls_only(s, c)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } #endif arg = s->args.elts; if (arg[0].len == 5) { if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) == 0) { if (s->args.nelts == 1) { return NGX_MAIL_AUTH_LOGIN; } if (s->args.nelts == 2) { return NGX_MAIL_AUTH_LOGIN_USERNAME; } return NGX_MAIL_PARSE_INVALID_COMMAND; } if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", 5) == 0) { if (s->args.nelts == 1) { return NGX_MAIL_AUTH_PLAIN; } if (s->args.nelts == 2) { return ngx_mail_auth_plain(s, c, 1); } } return NGX_MAIL_PARSE_INVALID_COMMAND; } if (arg[0].len == 8) { if (s->args.nelts != 1) { return NGX_MAIL_PARSE_INVALID_COMMAND; } if (ngx_strncasecmp(arg[0].data, (u_char *) "CRAM-MD5", 8) == 0) { return NGX_MAIL_AUTH_CRAM_MD5; } } return NGX_MAIL_PARSE_INVALID_COMMAND; }