int rfc822_parse_content_param(struct rfc822_parser_context *ctx, const char **key_r, const char **value_r) { string_t *tmp; size_t value_pos; int ret; /* .. := *(";" parameter) parameter := attribute "=" value attribute := token value := token / quoted-string */ *key_r = NULL; *value_r = NULL; if (ctx->data == ctx->end) return 0; if (*ctx->data != ';') return -1; ctx->data++; if (rfc822_skip_lwsp(ctx) <= 0) return -1; tmp = t_str_new(64); if (rfc822_parse_mime_token(ctx, tmp) <= 0) return -1; str_append_c(tmp, '\0'); value_pos = str_len(tmp); if (*ctx->data != '=') return -1; ctx->data++; if ((ret = rfc822_skip_lwsp(ctx)) <= 0) { /* broken / no value */ } else if (*ctx->data == '"') { ret = rfc822_parse_quoted_string(ctx, tmp); (void)str_unescape(str_c_modifiable(tmp) + value_pos); } else if (ctx->data != ctx->end && *ctx->data == '=') { /* workaround for broken input: name==?utf-8?b?...?= */ while (ctx->data != ctx->end && *ctx->data != ';' && *ctx->data != ' ' && *ctx->data != '\t' && *ctx->data != '\r' && *ctx->data != '\n') { str_append_c(tmp, *ctx->data); ctx->data++; } } else { ret = rfc822_parse_mime_token(ctx, tmp); } *key_r = str_c(tmp); *value_r = *key_r + value_pos; return ret < 0 ? -1 : 1; }
enum message_cte message_decoder_parse_cte(struct message_header_line *hdr) { struct rfc822_parser_context parser; enum message_cte message_cte; string_t *value; value = t_str_new(64); rfc822_parser_init(&parser, hdr->full_value, hdr->full_value_len, NULL); rfc822_skip_lwsp(&parser); (void)rfc822_parse_mime_token(&parser, value); message_cte = MESSAGE_CTE_UNKNOWN; switch (str_len(value)) { case 4: if (i_memcasecmp(str_data(value), "7bit", 4) == 0 || i_memcasecmp(str_data(value), "8bit", 4) == 0) message_cte = MESSAGE_CTE_78BIT; break; case 6: if (i_memcasecmp(str_data(value), "base64", 6) == 0) message_cte = MESSAGE_CTE_BASE64; else if (i_memcasecmp(str_data(value), "binary", 6) == 0) message_cte = MESSAGE_CTE_BINARY; break; case 16: if (i_memcasecmp(str_data(value), "quoted-printable", 16) == 0) message_cte = MESSAGE_CTE_QP; break; } return message_cte; }
int rfc822_parse_content_type(struct rfc822_parser_context *ctx, string_t *str) { if (rfc822_skip_lwsp(ctx) <= 0) return -1; /* get main type */ if (rfc822_parse_mime_token(ctx, str) <= 0) return -1; /* skip over "/" */ if (*ctx->data != '/') return -1; ctx->data++; if (rfc822_skip_lwsp(ctx) <= 0) return -1; str_append_c(str, '/'); /* get subtype */ return rfc822_parse_mime_token(ctx, str); }