mirror of
https://github.com/leahneukirchen/mblaze
synced 2024-11-03 15:40:32 +00:00
154 lines
2.9 KiB
C
154 lines
2.9 KiB
C
#define _GNU_SOURCE
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#include <string.h>
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#include "blaze822.h"
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#include "blaze822_priv.h"
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int
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blaze822_check_mime(struct message *msg)
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{
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char *v = blaze822_hdr(msg, "mime-version");
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return (v &&
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v[0] && v[0] == '1' &&
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v[1] && v[1] == '.' &&
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v[2] && v[2] == '0' &&
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(!v[3] || iswsp(v[3])));
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}
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int
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blaze822_mime_body(struct message *msg,
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char **cto, char **bodyo, size_t *bodyleno, char **bodychunko)
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{
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if (!msg->body || !msg->bodyend) {
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*bodyo = 0;
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*bodyleno = 0;
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*bodychunko = 0;
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return 0;
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}
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char *ct = blaze822_hdr(msg, "content-type");
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char *cte = blaze822_hdr(msg, "content-transfer-encoding");
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if (!ct)
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ct = "text/plain; charset=US-ASCII";
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char *s = ct;
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while (*s && *s != ';')
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s++;
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*cto = ct;
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if (cte) {
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if (strncasecmp(cte, "quoted-printable", 16) == 0) {
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blaze822_decode_qp(msg->body, msg->bodyend, bodyo, bodyleno);
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*bodychunko = *bodyo;
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} else if (strncasecmp(cte, "base64", 6) == 0) {
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blaze822_decode_b64(msg->body, msg->bodyend, bodyo, bodyleno);
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*bodychunko = *bodyo;
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} else {
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cte = 0;
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}
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}
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if (!cte) {
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*bodyo = msg->body;
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*bodyleno = msg->bodyend - msg->body;
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*bodychunko = 0;
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}
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return 1;
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}
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int
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blaze822_mime_parameter(char *s, char *name, char **starto, char **stopo)
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{
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s = strchr(s, ';');
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if (!s)
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return 0;
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s++;
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size_t namelen = strlen(name);
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while (*s) {
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while (iswsp(*s))
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s++;
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if (strncasecmp(s, name, namelen) == 0 && s[namelen] == '=') {
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s += namelen + 1;
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break;
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}
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s = strchr(s+1, ';');
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if (!s)
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return 0;
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s++;
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}
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if (!s || !*s)
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return 0;
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char *e;
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if (*s == '"') {
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s++;
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e = strchr(s, '"');
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if (!e)
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return 0;
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} else {
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e = s;
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while (*e && !iswsp(*e) && *e != ';')
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e++;
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}
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*starto = s;
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*stopo = e;
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return 1;
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}
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int
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blaze822_multipart(struct message *msg, struct message **imsg)
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{
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char *s = blaze822_hdr(msg, "content-type");
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if (!s)
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return 0;
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while (*s && *s != ';')
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s++;
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if (!*s)
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return 0;
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char *boundary, *boundaryend;
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if (!blaze822_mime_parameter(s, "boundary", &boundary, &boundaryend))
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return 0;
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char mboundary[256];
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int boundarylen = boundaryend-boundary+2;
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if (boundarylen >= 256)
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return 0;
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mboundary[0] = '-';
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mboundary[1] = '-';
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memcpy(mboundary+2, boundary, boundarylen-2);
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mboundary[boundarylen] = 0;
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char *prevpart;
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if (*imsg)
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prevpart = (*imsg)->bodyend;
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else
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prevpart = msg->body;
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char *part = memmem(prevpart, msg->bodyend - prevpart, mboundary, boundarylen);
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if (!part)
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return 0;
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/// XXX access to stuff before first boundary?
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part += boundarylen;
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if (*part == '\r')
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part++;
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if (*part == '\n')
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part++;
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else if (*part == '-' && part < msg->bodyend && *(part+1) == '-')
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return 0;
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else
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return 0; // XXX error condition?
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char *nextpart = memmem(part, msg->bodyend - part, mboundary, boundarylen);
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if (!nextpart)
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return 0; // XXX error condition
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*imsg = blaze822_mem(part, nextpart-part);
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return 1;
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}
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