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);
}
