/* * Copyright (C) 2000 Helix Code Inc. * * Authors: Michael Zucchi * Jeffrey Stedfast * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public License * as published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "camel-mime-utils.h" #include "camel-charset-map.h" #ifndef CLEAN_DATE #include "broken-date-parser.h" #endif #if 0 int strdup_count = 0; int malloc_count = 0; int free_count = 0; #define g_strdup(x) (strdup_count++, g_strdup(x)) #define g_malloc(x) (malloc_count++, g_malloc(x)) #define g_free(x) (free_count++, g_free(x)) #endif /* for all warnings ... */ #define w(x) x #define d(x) #define d2(x) #define CAMEL_UUDECODE_CHAR(c) (((c) - ' ') & 077) static char *base64_alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; static unsigned char tohex[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; static unsigned short camel_mime_special_table[256] = { 5, 5, 5, 5, 5, 5, 5, 5, 5,231, 7, 5, 5, 39, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 50,192, 76,192,192,192,192,192, 76, 76,192,192, 76,192, 72, 68, 192,192,192,192,192,192,192,192,192,192, 76, 76, 76, 4, 76, 68, 76,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, 192,192,192,192,192,192,192,192,192,192,192,108,236,108,192,192, 192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, 192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; static unsigned char camel_mime_base64_rank[256] = { 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255, 62,255,255,255, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,255,255,255, 0,255,255, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,255,255,255,255,255, 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, }; /* if any of these change, then the tables above should be regenerated by compiling this with -DBUILD_TABLE, and running. gcc -DCLEAN_DATE -o buildtable -I.. `glib-config --cflags --libs` -lunicode -DBUILD_TABLE camel-mime-utils.c ./buildtable */ enum { IS_CTRL = 1<<0, IS_LWSP = 1<<1, IS_TSPECIAL = 1<<2, IS_SPECIAL = 1<<3, IS_SPACE = 1<<4, IS_DSPECIAL = 1<<5, IS_QPSAFE = 1<<6, IS_ESAFE = 1<<7, /* encoded word safe */ IS_PSAFE = 1<<8, /* encoded word in phrase safe */ }; #define is_ctrl(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_CTRL) != 0) #define is_lwsp(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_LWSP) != 0) #define is_tspecial(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_TSPECIAL) != 0) #define is_type(x, t) ((camel_mime_special_table[(unsigned char)(x)] & (t)) != 0) #define is_ttoken(x) ((camel_mime_special_table[(unsigned char)(x)] & (IS_TSPECIAL|IS_LWSP|IS_CTRL)) == 0) #define is_atom(x) ((camel_mime_special_table[(unsigned char)(x)] & (IS_SPECIAL|IS_SPACE|IS_CTRL)) == 0) #define is_dtext(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_DSPECIAL) == 0) #define is_fieldname(x) ((camel_mime_special_table[(unsigned char)(x)] & (IS_CTRL|IS_SPACE)) == 0) #define is_qpsafe(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_QPSAFE) != 0) #define is_especial(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_ESPECIAL) != 0) #define is_psafe(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_PSAFE) != 0) #define is_blank(c) ((c) == ' ' || (c) == '\t') /* only needs to be run to rebuild the tables above */ #ifdef BUILD_TABLE #define CHARS_LWSP " \t\n\r" #define CHARS_TSPECIAL "()<>@,;:\\\"/[]?=" #define CHARS_SPECIAL "()<>@,;:\\\".[]" #define CHARS_CSPECIAL "()\\\r" /* not in comments */ #define CHARS_DSPECIAL "[]\\\r \t" /* not in domains */ #define CHARS_ESPECIAL "()<>@,;:\"/[]?.=" /* encoded word specials */ #define CHARS_PSPECIAL "!*+-/=_" /* encoded word specials */ static void header_remove_bits(unsigned short bit, unsigned char *vals) { int i; for (i=0;vals[i];i++) camel_mime_special_table[vals[i]] &= ~ bit; } static void header_init_bits(unsigned short bit, unsigned short bitcopy, int remove, unsigned char *vals) { int i; int len = strlen(vals); if (!remove) { for (i=0;i=33 && i<=60) || (i>=62 && i<=126) || i==32 || i==9) camel_mime_special_table[i] |= IS_QPSAFE|IS_ESAFE; if ((i>='0' && i<='9') || (i>='a' && i<='z') || (i>='A' && i<= 'Z')) camel_mime_special_table[i] |= IS_PSAFE; } camel_mime_special_table[127] = IS_CTRL; camel_mime_special_table[' '] = IS_SPACE; header_init_bits(IS_LWSP, 0, 0, CHARS_LWSP); header_init_bits(IS_TSPECIAL, IS_CTRL, 0, CHARS_TSPECIAL); header_init_bits(IS_SPECIAL, 0, 0, CHARS_SPECIAL); header_init_bits(IS_DSPECIAL, 0, FALSE, CHARS_DSPECIAL); header_remove_bits(IS_ESAFE, CHARS_ESPECIAL); header_init_bits(IS_PSAFE, 0, 0, CHARS_PSPECIAL); } void base64_init(void) { int i; memset(camel_mime_base64_rank, 0xff, sizeof(camel_mime_base64_rank)); for (i=0;i<64;i++) { camel_mime_base64_rank[(unsigned int)base64_alphabet[i]] = i; } camel_mime_base64_rank['='] = 0; } int main(int argc, char **argv) { int i; void run_test(void); header_decode_init(); base64_init(); printf("static unsigned short camel_mime_special_table[256] = {\n\t"); for (i=0;i<256;i++) { printf("%3d,", camel_mime_special_table[i]); if ((i&15) == 15) { printf("\n"); if (i!=255) { printf("\t"); } } } printf("};\n"); printf("static unsigned char camel_mime_base64_rank[256] = {\n\t"); for (i=0;i<256;i++) { printf("%3d,", camel_mime_base64_rank[i]); if ((i&15) == 15) { printf("\n"); if (i!=255) { printf("\t"); } } } printf("};\n"); run_test(); return 0; } #endif /* call this when finished encoding everything, to flush off the last little bit */ int base64_encode_close(unsigned char *in, int inlen, unsigned char *out, int *state, int *save) { int c1, c2; unsigned char *outptr = out; if (inlen>0) outptr += base64_encode_step(in, inlen, outptr, state, save); c1 = ((char *)save)[1]; c2 = ((char *)save)[2]; switch (((char *)save)[0]) { case 2: outptr[2] = base64_alphabet [ ( (c2 &0x0f) << 2 ) ]; goto skip; case 1: outptr[2] = '='; skip: outptr[0] = base64_alphabet [ c1 >> 2 ]; outptr[1] = base64_alphabet [ c2 >> 4 | ( (c1&0x3) << 4 )]; outptr[3] = '='; outptr += 4; break; } *outptr++ = '\n'; *save = 0; *state = 0; return outptr-out; } /* performs an 'encode step', only encodes blocks of 3 characters to the output at a time, saves left-over state in state and save (initialise to 0 on first invocation). */ int base64_encode_step(unsigned char *in, int len, unsigned char *out, int *state, int *save) { register unsigned char *inptr, *outptr; if (len<=0) return 0; inptr = in; outptr = out; d(printf("we have %d chars, and %d saved chars\n", len, ((char *)save)[0])); if (len + ((char *)save)[0] > 2) { unsigned char *inend = in+len-2; register int c1, c2, c3; register int already; already = *state; switch (((char *)save)[0]) { case 1: c1 = ((unsigned char *)save)[1]; goto skip1; case 2: c1 = ((unsigned char *)save)[1]; c2 = ((unsigned char *)save)[2]; goto skip2; } /* yes, we jump into the loop, no i'm not going to change it, its beautiful! */ while (inptr < inend) { c1 = *inptr++; skip1: c2 = *inptr++; skip2: c3 = *inptr++; *outptr++ = base64_alphabet [ c1 >> 2 ]; *outptr++ = base64_alphabet [ c2 >> 4 | ( (c1&0x3) << 4 ) ]; *outptr++ = base64_alphabet [ ( (c2 &0x0f) << 2 ) | (c3 >> 6) ]; *outptr++ = base64_alphabet [ c3 & 0x3f ]; /* this is a bit ugly ... */ if ((++already)>=19) { *outptr++='\n'; already = 0; } } ((char *)save)[0] = 0; len = 2-(inptr-inend); *state = already; } d(printf("state = %d, len = %d\n", (int)((char *)save)[0], len)); if (len>0) { register char *saveout; /* points to the slot for the next char to save */ saveout = & (((char *)save)[1]) + ((char *)save)[0]; /* len can only be 0 1 or 2 */ switch(len) { case 2: *saveout++ = *inptr++; case 1: *saveout++ = *inptr++; } ((char *)save)[0]+=len; } d(printf("mode = %d\nc1 = %c\nc2 = %c\n", (int)((char *)save)[0], (int)((char *)save)[1], (int)((char *)save)[2])); return outptr-out; } /** * base64_decode_step: decode a chunk of base64 encoded data * @in: input stream * @len: max length of data to decode ( normally strlen(in) ??) * @out: output stream * @state: holds the number of bits that are stored in @save * @save: leftover bits that have not yet been decoded * * Decodes a chunk of base64 encoded data **/ int base64_decode_step(unsigned char *in, int len, unsigned char *out, int *state, unsigned int *save) { register unsigned char *inptr, *outptr; unsigned char *inend, c; register unsigned int v; int i; inend = in+len; outptr = out; /* convert 4 base64 bytes to 3 normal bytes */ v=*save; i=*state; inptr = in; while (inptr>16; *outptr++ = v>>8; *outptr++ = v; i=0; } } } *save = v; *state = i; /* quick scan back for '=' on the end somewhere */ /* fortunately we can drop 1 output char for each trailing = (upto 2) */ i=2; while (inptr>in && i) { inptr--; if (camel_mime_base64_rank[*inptr] != 0xff) { if (*inptr == '=') outptr--; i--; } } /* if i!= 0 then there is a truncation error! */ return outptr-out; } /** * uudecode_step: uudecode a chunk of data * @in: input stream * @len: max length of data to decode ( normally strlen(in) ??) * @out: output stream * @state: holds the number of bits that are stored in @save * @save: leftover bits that have not yet been decoded * @uulen: holds the value of the length-char which is used to calculate * how many more chars need to be decoded for that 'line' * * uudecodes a chunk of data. Assumes the "begin " line * has been stripped off. **/ int uudecode_step (unsigned char *in, int len, unsigned char *out, int *state, guint32 *save, char *uulen) { register unsigned char *inptr, *outptr; unsigned char *inend, ch; register guint32 saved; gboolean last_was_eoln; int i; if (*uulen <= 0) last_was_eoln = TRUE; else last_was_eoln = FALSE; inend = in + len; outptr = out; saved = *save; i = *state; inptr = in; while (inptr < inend && *inptr) { if (*inptr == '\n' || last_was_eoln) { if (last_was_eoln) { *uulen = CAMEL_UUDECODE_CHAR (*inptr); last_was_eoln = FALSE; } else { last_was_eoln = TRUE; } inptr++; continue; } ch = *inptr++; if (*uulen > 0) { /* save the byte */ saved = (saved << 8) | ch; i++; if (i == 4) { /* convert 4 uuencoded bytes to 3 normal bytes */ unsigned char b0, b1, b2, b3; b0 = saved >> 24; b1 = saved >> 16 & 0xff; b2 = saved >> 8 & 0xff; b3 = saved & 0xff; if (*uulen >= 3) { *outptr++ = CAMEL_UUDECODE_CHAR (b0) << 2 | CAMEL_UUDECODE_CHAR (b1) >> 4; *outptr++ = CAMEL_UUDECODE_CHAR (b1) << 4 | CAMEL_UUDECODE_CHAR (b2) >> 2; *outptr++ = CAMEL_UUDECODE_CHAR (b2) << 6 | CAMEL_UUDECODE_CHAR (b3); } else { if (*uulen >= 1) { *outptr++ = CAMEL_UUDECODE_CHAR (b0) << 2 | CAMEL_UUDECODE_CHAR (b1) >> 4; } if (*uulen >= 2) { *outptr++ = CAMEL_UUDECODE_CHAR (b1) << 4 | CAMEL_UUDECODE_CHAR (b2) >> 2; } } i = 0; saved = 0; *uulen -= 3; } } else { break; } } *save = saved; *state = i; return outptr - out; } int quoted_encode_close(unsigned char *in, int len, unsigned char *out, int *state, int *save) { register unsigned char *outptr = out; int last; if (len>0) outptr += quoted_encode_step(in, len, outptr, state, save); last = *state; if (last != -1) { /* space/tab must be encoded if its the last character on the line */ if (is_qpsafe(last) && last!=' ' && last!=9) { *outptr++ = last; } else { *outptr++ = '='; *outptr++ = tohex[(last>>4) & 0xf]; *outptr++ = tohex[last & 0xf]; } } /* hmm, not sure if this should really be added here, we dont want to add it to the content, afterall ...? */ *outptr++ = '\n'; *save = 0; *state = -1; return outptr-out; } int quoted_encode_step (unsigned char *in, int len, unsigned char *out, int *statep, int *save) { register guchar *inptr, *outptr, *inend; guchar c; register int sofar = *save; /* keeps track of how many chars on a line */ register int last = *statep; /* keeps track if last char to end was a space cr etc */ inptr = in; inend = in + len; outptr = out; while (inptr < inend) { c = *inptr++; if (c == '\r') { if (last != -1) { *outptr++ = '='; *outptr++ = tohex[(last >> 4) & 0xf]; *outptr++ = tohex[last & 0xf]; sofar += 3; } last = c; } else if (c == '\n') { if (last != -1 && last != '\r') { *outptr++ = '='; *outptr++ = tohex[(last >> 4) & 0xf]; *outptr++ = tohex[last & 0xf]; } *outptr++ = '\n'; sofar = 0; last = -1; } else { if (last != -1) { if (is_qpsafe (last) || is_blank (last)) { *outptr++ = last; sofar++; } else { *outptr++ = '='; *outptr++ = tohex[(last >> 4) & 0xf]; *outptr++ = tohex[last & 0xf]; sofar += 3; } } if (is_qpsafe (c) || is_blank (c)) { if (sofar > 74) { *outptr++ = '='; *outptr++ = '\n'; sofar = 0; } /* delay output of space char */ if (is_blank (c)) { last = c; } else { *outptr++ = c; sofar++; last = -1; } } else { if (sofar > 72) { *outptr++ = '='; *outptr++ = '\n'; sofar = 3; } else sofar += 3; *outptr++ = '='; *outptr++ = tohex[(c >> 4) & 0xf]; *outptr++ = tohex[c & 0xf]; last = -1; } } } *save = sofar; *statep = last; return (outptr - out); } /* FIXME: this does not strip trailing spaces from lines (as it should, rfc 2045, section 6.7) Should it also canonicalise the end of line to CR LF?? Note: Trailing rubbish (at the end of input), like = or =x or =\r will be lost. */ int quoted_decode_step(unsigned char *in, int len, unsigned char *out, int *savestate, int *saveme) { register unsigned char *inptr, *outptr; unsigned char *inend, c; int state, save; inend = in+len; outptr = out; d(printf("quoted-printable, decoding text '%.*s'\n", len, in)); state = *savestate; save = *saveme; inptr = in; while (inptr='A'?save-'A'+10:save-'0')&0x0f) << 4) | ((c>='A'?c-'A'+10:c-'0')&0x0f); } else if (c=='\n' && save == '\r') { /* soft break ... canonical end of line */ } else { /* just output the data */ *outptr++ = '='; *outptr++ = save; *outptr++ = c; } state = 0; break; #ifdef CANONICALISE_EOL case 3: /* convert \r -> to \r\n, leaves \r\n alone */ c = *inptr++; if (c=='\n') { *outptr++ = '\r'; *outptr++ = c; } else { *outptr++ = '\r'; *outptr++ = '\n'; *outptr++ = c; } state = 0; break; #endif } } *savestate = state; *saveme = save; return outptr-out; } /* this is for the "Q" encoding of international words, which is slightly different than plain quoted-printable */ static int quoted_decode(const unsigned char *in, int len, unsigned char *out) { register const unsigned char *inptr; register unsigned char *outptr; unsigned const char *inend; unsigned char c, c1; int ret = 0; inend = in+len; outptr = out; d(printf("decoding text '%.*s'\n", len, in)); inptr = in; while (inptr=2) { c = toupper(*inptr++); c1 = toupper(*inptr++); *outptr++ = (((c>='A'?c-'A'+10:c-'0')&0x0f) << 4) | ((c1>='A'?c1-'A'+10:c1-'0')&0x0f); } else { ret = -1; break; } } else if (c=='_') { *outptr++ = 0x20; } else if (c==' ' || c==0x09) { /* FIXME: this is an error! ignore for now ... */ ret = -1; break; } else { *outptr++ = c; } } if (ret==0) { return outptr-out; } return -1; } /* rfc2047 version of quoted-printable */ /* safemask is the mask to apply to the camel_mime_special_table to determine what characters can safely be included without encoding */ /* Why do we need a 'safemask'? we always want to encode the same. */ static int quoted_encode(const unsigned char *in, int len, unsigned char *out, unsigned short safemask) { register const unsigned char *inptr, *inend; unsigned char *outptr; unsigned char c; inptr = in; inend = in + len; outptr = out; while (inptr < inend) { c = *inptr++; if ((is_qpsafe (c) || c == ' ') && !(c == '_' || c == '?')) { /*if (camel_mime_special_table[c] & safemask) {*/ if (c == ' ') c = '_'; *outptr++ = c; } else { *outptr++ = '='; *outptr++ = tohex[(c >> 4) & 0xf]; *outptr++ = tohex[c & 0xf]; } } d(printf("encoding '%.*s' = '%.*s'\n", len, in, outptr-out, out)); return (outptr - out); } static void header_decode_lwsp(const char **in) { const char *inptr = *in; char c; d2(printf("is ws: '%s'\n", *in)); while (is_lwsp(*inptr) || (*inptr =='(' && *inptr != '\0')) { while (is_lwsp(*inptr) && inptr != '\0') { d2(printf("(%c)", *inptr)); inptr++; } d2(printf("\n")); /* check for comments */ if (*inptr == '(') { int depth = 1; inptr++; while (depth && (c=*inptr) && *inptr != '\0') { if (c=='\\' && inptr[1]) { inptr++; } else if (c=='(') { depth++; } else if (c==')') { depth--; } inptr++; } } } *in = inptr; } /* decode rfc 2047 encoded string segment */ static char * rfc2047_decode_word(const char *in, int len) { const char *inptr = in+2; const char *inend = in+len-2; char *encname; int tmplen; int ret; char *decword = NULL; char *decoded = NULL; char *outbase = NULL; char *inbuf, *outbuf; int inlen, outlen; unicode_iconv_t ic; d(printf("decoding '%.*s'\n", len, in)); /* just make sure we're not passed shit */ if (len<7 || !(in[0]=='=' && in[1]=='?' && in[len-1]=='=' && in[len-2]=='?')) { d(printf("invalid\n")); return NULL; } inptr = memchr(inptr, '?', inend-inptr); if (inptr!=NULL && inptr0) { /* yuck, all this snot is to setup iconv! */ tmplen = inptr-in-3; encname = alloca(tmplen+1); encname[tmplen]=0; memcpy(encname, in+2, tmplen); inbuf = decword; outlen = inlen*6; outbase = alloca(outlen); outbuf = outbase; /* TODO: Should this cache iconv converters? */ ic = unicode_iconv_open("UTF-8", encname); if (ic != (unicode_iconv_t)-1) { ret = unicode_iconv(ic, (const char **)&inbuf, &inlen, &outbuf, &outlen); unicode_iconv_close(ic); if (ret>=0) { *outbuf = 0; decoded = g_strdup(outbase); } } else { w(g_warning("Cannot decode charset, header display may be corrupt: %s: %s", encname, strerror(errno))); /* TODO: Should this do this, or just leave the encoded strings? */ decword[inlen] = 0; decoded = g_strdup(decword); } } } d(printf("decoded '%s'\n", decoded)); return decoded; } /* grrr, glib should have this ! */ static GString * g_string_append_len(GString *st, const char *s, int l) { char *tmp; tmp = alloca(l+1); tmp[l]=0; memcpy(tmp, s, l); return g_string_append(st, tmp); } /* ok, a lot of mailers are BROKEN, and send iso-latin1 encoded headers, when they should just be sticking to US-ASCII according to the rfc's. Anyway, since the conversion to utf-8 is trivial, just do it here without iconv */ static GString * append_latin1(GString *out, const char *in, int len) { unsigned int c; while (len) { c = (unsigned int)*in++; len--; if (c & 0x80) { out = g_string_append_c(out, 0xc0 | ((c>>6) & 0x3)); /* 110000xx */ out = g_string_append_c(out, 0x80 | (c&0x3f)); /* 10xxxxxx */ } else { out = g_string_append_c(out, c); } } return out; } /* decodes a simple text, rfc822 */ static char * header_decode_text (const char *in, int inlen) { GString *out; char *inptr, *inend, *start; char *decoded; out = g_string_new (""); start = inptr = (char *) in; inend = inptr + inlen; while (inptr && inptr < inend) { char c = *inptr++; if (isspace (c)) { char *word, *dword; guint len; len = inptr - start - 1; word = start; dword = rfc2047_decode_word (word, len); if (dword) { g_string_append (out, dword); g_free (dword); } else { out = append_latin1 (out, word, len); } g_string_append_c (out, c); start = inptr; } } if (inptr - start) { char *word, *dword; guint len; len = inptr - start; word = start; dword = rfc2047_decode_word (word, len); if (dword) { g_string_append (out, dword); g_free (dword); } else { out = g_string_append_len (out, word, len); } } decoded = out->str; g_string_free (out, FALSE); return decoded; } #if 0 /* This is broken */ /* decodes a simple text, rfc822 */ static char * header_decode_text(const char *in, int inlen) { GString *out; const char *inptr = in; const char *inend = in+inlen; char *encstart, *encend; char *decword; out = g_string_new(""); while ( (encstart = strstr(inptr, "=?")) && (encend = strstr(encstart+2, "?=")) ) { decword = rfc2047_decode_word(encstart, encend-encstart+2); if (decword) { out = g_string_append_len(out, inptr, encstart-inptr); out = g_string_append_len(out, decword, strlen(decword)); g_free (decword); } else { out = append_latin1(out, inptr, encend-inptr+2); } inptr = encend+2; } out = append_latin1(out, inptr, inend-inptr); encstart = out->str; g_string_free(out, FALSE); return encstart; } #endif char * header_decode_string(const char *in) { if (in == NULL) return NULL; return header_decode_text(in, strlen(in)); } static char *encoding_map[] = { "US-ASCII", "ISO-8859-1", "UTF-8" }; /* FIXME: needs a way to cache iconv opens for different charsets? */ static void rfc2047_encode_word(GString *outstring, const char *in, int len, const char *type, unsigned short safemask) { unicode_iconv_t ic; char *buffer, *out, *ascii; size_t inlen, outlen, enclen; d(printf("Converting '%.*s' to %s\n", len, in, type)); /* convert utf8->encoding */ outlen = len*6; buffer = alloca(outlen); inlen = len; out = buffer; /* if we can't convert from utf-8, just encode as utf-8 */ if (!strcasecmp(type, "UTF-8") || (ic = unicode_iconv_open(type, "UTF-8")) == (unicode_iconv_t)-1) { memcpy(buffer, in, len); out = buffer+len; type = "UTF-8"; } else { if (unicode_iconv(ic, &in, &inlen, &out, &outlen) == -1) { w(g_warning("Conversion problem: conversion truncated: %s", strerror(errno))); } unicode_iconv_close(ic); } enclen = out-buffer; /* now create qp version */ ascii = alloca(enclen*3 + strlen(type) + 8); out = ascii; /* should determine which encoding is smaller, and use that? */ out += sprintf(out, "=?%s?Q?", type); out += quoted_encode(buffer, enclen, out, safemask); sprintf(out, "?="); d(printf("converted = %s\n", ascii)); g_string_append(outstring, ascii); } /* TODO: Should this worry about quotes?? */ char * header_encode_string(const unsigned char *in) { GString *out; const unsigned char *inptr = in, *start; int encoding; char *outstr; if (in == NULL) return NULL; /* do a quick us-ascii check (the common case?) */ while (*inptr) { if (*inptr > 127) break; inptr++; } if (*inptr == 0) return g_strdup(in); /* This gets each word out of the input, and checks to see what charset can be used to encode it. */ /* TODO: Work out when to merge subsequent words, or across word-parts */ /* FIXME: Make sure a converted word is less than the encoding size */ out = g_string_new(""); inptr = in; encoding = 0; start = inptr; while (inptr && *inptr) { unicode_char_t c; const char *newinptr; newinptr = unicode_get_utf8(inptr, &c); if (newinptr == NULL) { w(g_warning("Invalid UTF-8 sequence encountered (pos %d, char '%c'): %s", (inptr-in), inptr[0], in)); inptr++; continue; } inptr = newinptr; if (unicode_isspace(c)) { /* we've reached the end of a 'word' */ switch (encoding) { case 0: out = g_string_append_len(out, start, inptr-start); break; case 1: rfc2047_encode_word(out, start, inptr-start-1, "ISO-8859-1", IS_ESAFE); out = g_string_append_c (out, c); break; case 2: rfc2047_encode_word(out, start, inptr-start-1, camel_charset_best(start, inptr-start-1), IS_ESAFE); out = g_string_append_c(out, c); break; } start = inptr; encoding = 0; } else if (c > 127 && c < 256) { encoding = MAX(encoding, 1); } else if (c >= 256) { encoding = MAX(encoding, 2); } } if (inptr-start) { switch (encoding) { case 0: out = g_string_append_len(out, start, inptr-start); break; case 1: rfc2047_encode_word(out, start, inptr-start-1, "ISO-8859-1", IS_ESAFE); break; case 2: rfc2047_encode_word(out, start, inptr-start-1, camel_charset_best(start, inptr-start-1), IS_ESAFE); break; } } outstr = out->str; g_string_free(out, FALSE); return outstr; } /* apply quoted-string rules to a string */ static void quote_word(GString *out, gboolean do_quotes, const char *start, int len) { int i, c; /* TODO: What about folding on long lines? */ if (do_quotes) g_string_append_c(out, '"'); for (i=0;i 0) { word = g_malloc0(sizeof(*word)); word->start = start; word->end = last; word->type = type; word->encoding = encoding; words = g_list_append(words, word); count = 0; } start = inptr; type = WORD_ATOM; encoding = 0; } else { count++; if (c<128) { if (!is_atom(c)) type = MAX(type, WORD_QSTRING); } else if (c>127 && c < 256) { type = WORD_2047; encoding = MAX(encoding, 1); } else if (c >=256) { type = WORD_2047; encoding = MAX(encoding, 2); } } last = inptr; } if (count > 0) { word = g_malloc0(sizeof(*word)); word->start = start; word->end = last; word->type = type; word->encoding = encoding; words = g_list_append(words, word); } /* now scan the list, checking for words of similar types that can be merged */ wordl = words; while (wordl) { word = wordl->data; /* leave atoms as atoms (unless they're surrounded by quoted words??) */ if (word->type != WORD_ATOM) { nextl = g_list_next(wordl); while (nextl) { next = nextl->data; /* merge nodes of the same (or lower?) type*/ if (word->type == next->type || (next->type < word->type && word->type < WORD_2047) ) { word->end = next->end; words = g_list_remove_link(words, nextl); g_free(next); nextl = g_list_next(wordl); } else { break; } } } wordl = g_list_next(wordl); } /* output words now with spaces between them */ wordl = words; while (wordl) { word = wordl->data; switch (word->type) { case WORD_ATOM: out = g_string_append_len(out, word->start, word->end-word->start); break; case WORD_QSTRING: quote_word(out, TRUE, word->start, word->end-word->start); break; case WORD_2047: if (word->encoding == 1) rfc2047_encode_word(out, word->start, word->end-word->start, "ISO-8859-1", IS_PSAFE); else rfc2047_encode_word(out, word->start, word->end-word->start, camel_charset_best(word->start, word->end-word->start), IS_PSAFE); break; } /* copy across the right number of spaces between words */ nextl = g_list_next(wordl); if (nextl) { int i; next = nextl->data; for (i=next->start-word->end;i>0;i--) out = g_string_append_c(out, ' '); } g_free(word); wordl = g_list_next(wordl); } /* and we no longer need the list */ g_list_free(words); outstr = out->str; g_string_free(out, FALSE); return outstr; } /* these are all internal parser functions */ static char * decode_token(const char **in) { const char *inptr = *in; const char *start; header_decode_lwsp(&inptr); start = inptr; while (is_ttoken(*inptr)) inptr++; if (inptr>start) { *in = inptr; return g_strndup(start, inptr-start); } else { return NULL; } } char * header_token_decode(const char *in) { if (in == NULL) return NULL; return decode_token(&in); } /* <"> * ( \, cr / \ ) <"> */ static char * header_decode_quoted_string(const char **in) { const char *inptr = *in; char *out = NULL, *outptr; int outlen; int c; header_decode_lwsp(&inptr); if (*inptr == '"') { const char *intmp; int skip = 0; /* first, calc length */ inptr++; intmp = inptr; while ( (c = *intmp++) && c!= '"' && c != '\0') { if (c=='\\' && *intmp) { intmp++; skip++; } } outlen = intmp-inptr-skip; out = outptr = g_malloc(outlen+1); while ( (c = *inptr++) && c!= '"' && c != '\0') { if (c=='\\' && *inptr) { c = *inptr++; } *outptr++ = c; } *outptr = 0; } *in = inptr; return out; } static char * header_decode_atom(const char **in) { const char *inptr = *in, *start; header_decode_lwsp(&inptr); start = inptr; while (is_atom(*inptr)) inptr++; *in = inptr; if (inptr > start) return g_strndup(start, inptr-start); else return NULL; } static char * header_decode_word(const char **in) { const char *inptr = *in; header_decode_lwsp(&inptr); if (*inptr == '"') { *in = inptr; return header_decode_quoted_string(in); } else { *in = inptr; return header_decode_atom(in); } } static char * header_decode_value(const char **in) { const char *inptr = *in; header_decode_lwsp(&inptr); if (*inptr == '"') { d(printf("decoding quoted string\n")); return header_decode_quoted_string(in); } else if (is_ttoken(*inptr)) { d(printf("decoding token\n")); /* this may not have the right specials for all params? */ return decode_token(in); } return NULL; } /* shoudl this return -1 for no int? */ static int header_decode_int(const char **in) { const char *inptr = *in; int c, v=0; header_decode_lwsp(&inptr); while ( (c=*inptr++ & 0xff) && isdigit(c) ) { v = v*10+(c-'0'); } *in = inptr-1; return v; } static int header_decode_param(const char **in, char **paramp, char **valuep) { const char *inptr = *in; char *param, *value=NULL; param = decode_token(&inptr); header_decode_lwsp(&inptr); if (*inptr == '=') { inptr++; value = header_decode_value(&inptr); } if (param && value) { *paramp = param; *valuep = value; *in = inptr; return 0; } else { g_free(param); g_free(value); return 1; } } char * header_param(struct _header_param *p, const char *name) { while (p && strcasecmp(p->name, name) != 0) p = p->next; if (p) return p->value; return NULL; } struct _header_param * header_set_param(struct _header_param **l, const char *name, const char *value) { struct _header_param *p = (struct _header_param *)l, *pn; while (p->next) { pn = p->next; if (!strcasecmp(pn->name, name)) { g_free(pn->value); if (value) { pn->value = g_strdup(value); return pn; } else { p->next = pn->next; g_free(pn); return NULL; } } p = pn; } if (value == NULL) return NULL; pn = g_malloc(sizeof(*pn)); pn->next = 0; pn->name = g_strdup(name); pn->value = g_strdup(value); p->next = pn; return pn; } const char * header_content_type_param(struct _header_content_type *t, const char *name) { if (t==NULL) return NULL; return header_param(t->params, name); } void header_content_type_set_param(struct _header_content_type *t, const char *name, const char *value) { header_set_param(&t->params, name, value); } /** * header_content_type_is: * @ct: A content type specifier, or #NULL. * @type: A type to check against. * @subtype: A subtype to check against, or "*" to match any subtype. * * Returns #TRUE if the content type @ct is of type @type/@subtype. * The subtype of "*" will match any subtype. If @ct is #NULL, then * it will match the type "text/plain". * * Return value: #TRUE or #FALSE depending on the matching of the type. **/ int header_content_type_is(struct _header_content_type *ct, const char *type, const char *subtype) { /* no type == text/plain or text/"*" */ if (ct==NULL || (ct->type == NULL && ct->subtype == NULL)) { return (!strcasecmp(type, "text") && (!strcasecmp(subtype, "plain") || !strcasecmp(subtype, "*"))); } return (ct->type != NULL && (!strcasecmp(ct->type, type) && ((ct->subtype != NULL && !strcasecmp(ct->subtype, subtype)) || !strcasecmp("*", subtype)))); } void header_param_list_free(struct _header_param *p) { struct _header_param *n; while (p) { n = p->next; g_free(p->name); g_free(p->value); g_free(p); p = n; } } struct _header_content_type * header_content_type_new(const char *type, const char *subtype) { struct _header_content_type *t = g_malloc(sizeof(*t)); t->type = g_strdup(type); t->subtype = g_strdup(subtype); t->params = NULL; t->refcount = 1; return t; } void header_content_type_ref(struct _header_content_type *ct) { if (ct) ct->refcount++; } void header_content_type_unref(struct _header_content_type *ct) { if (ct) { if (ct->refcount <= 1) { header_param_list_free(ct->params); g_free(ct->type); g_free(ct->subtype); g_free(ct); } else { ct->refcount--; } } } /* for decoding email addresses, canonically */ static char * header_decode_domain(const char **in) { const char *inptr = *in, *start; int go = TRUE; char *ret; GString *domain = g_string_new(""); /* domain ref | domain literal */ header_decode_lwsp(&inptr); while (go) { if (*inptr == '[') { /* domain literal */ domain = g_string_append(domain, "[ "); inptr++; header_decode_lwsp(&inptr); start = inptr; while (is_dtext(*inptr)) { domain = g_string_append_c(domain, *inptr); inptr++; } if (*inptr == ']') { domain = g_string_append(domain, " ]"); inptr++; } else { w(g_warning("closing ']' not found in domain: %s", *in)); } } else { char *a = header_decode_atom(&inptr); if (a) { domain = g_string_append(domain, a); g_free(a); } else { w(g_warning("missing atom from domain-ref")); break; } } header_decode_lwsp(&inptr); if (*inptr == '.') { /* next sub-domain? */ domain = g_string_append_c(domain, '.'); inptr++; header_decode_lwsp(&inptr); } else go = FALSE; } *in = inptr; ret = domain->str; g_string_free(domain, FALSE); return ret; } static char * header_decode_addrspec(const char **in) { const char *inptr = *in; char *word; GString *addr = g_string_new(""); header_decode_lwsp(&inptr); /* addr-spec */ word = header_decode_word(&inptr); if (word) { addr = g_string_append(addr, word); header_decode_lwsp(&inptr); g_free(word); while (*inptr == '.' && word) { inptr++; addr = g_string_append_c(addr, '.'); word = header_decode_word(&inptr); if (word) { addr = g_string_append(addr, word); header_decode_lwsp(&inptr); g_free(word); } else { w(g_warning("Invalid address spec: %s", *in)); } } if (*inptr == '@') { inptr++; addr = g_string_append_c(addr, '@'); word = header_decode_domain(&inptr); if (word) { addr = g_string_append(addr, word); g_free(word); } else { w(g_warning("Invalid address, missing domain: %s", *in)); } } else { w(g_warning("Invalid addr-spec, missing @: %s", *in)); } } else { w(g_warning("invalid addr-spec, no local part")); } /* FIXME: return null on error? */ *in = inptr; word = addr->str; g_string_free(addr, FALSE); return word; } /* address: word *('.' word) @ domain | *(word) '<' [ *('@' domain ) ':' ] word *( '.' word) @ domain | 1*word ':' [ word ... etc (mailbox, as above) ] ';' */ /* mailbox: word *( '.' word ) '@' domain *(word) '<' [ *('@' domain ) ':' ] word *( '.' word) @ domain */ static struct _header_address * header_decode_mailbox(const char **in) { const char *inptr = *in; char *pre; int closeme = FALSE; GString *addr; GString *name = NULL; struct _header_address *address = NULL; addr = g_string_new(""); /* for each address */ pre = header_decode_word(&inptr); header_decode_lwsp(&inptr); if (!(*inptr == '.' || *inptr == '@' || *inptr==',' || *inptr=='\0')) { /* ',' and '\0' required incase it is a simple address, no @ domain part (buggy writer) */ name = g_string_new(""); while (pre) { char *text; /* perform internationalised decoding, and appent */ text = header_decode_string(pre); name = g_string_append(name, text); g_free(pre); g_free(text); pre = header_decode_word(&inptr); if (pre) name = g_string_append_c(name, ' '); } header_decode_lwsp(&inptr); if (*inptr == '<') { closeme = TRUE; inptr++; header_decode_lwsp(&inptr); if (*inptr == '@') { while (*inptr == '@') { inptr++; header_decode_domain(&inptr); header_decode_lwsp(&inptr); if (*inptr == ',') { inptr++; header_decode_lwsp(&inptr); } } if (*inptr == ':') { inptr++; } else { w(g_warning("broken route-address, missing ':': %s", *in)); } } pre = header_decode_word(&inptr); header_decode_lwsp(&inptr); } else { w(g_warning("broken address? %s", *in)); } } if (pre) { addr = g_string_append(addr, pre); } else { w(g_warning("No local-part for email address: %s", *in)); } /* should be at word '.' localpart */ while (*inptr == '.' && pre) { inptr++; g_free(pre); pre = header_decode_word(&inptr); if (pre) { addr = g_string_append_c(addr, '.'); addr = g_string_append(addr, pre); } header_decode_lwsp(&inptr); } g_free(pre); /* now at '@' domain part */ if (*inptr == '@') { char *dom; inptr++; addr = g_string_append_c(addr, '@'); dom = header_decode_domain(&inptr); addr = g_string_append(addr, dom); g_free(dom); } else { w(g_warning("invalid address, no '@' domain part at %c: %s", *inptr, *in)); } if (closeme) { header_decode_lwsp(&inptr); if (*inptr == '>') { inptr++; } else { w(g_warning("invalid route address, no closing '>': %s", *in)); } } else if (name == NULL) { /* check for comment after address */ char *text, *tmp; const char *comment = inptr; header_decode_lwsp(&inptr); if (inptr-comment > 3) { /* just guess ... */ tmp = g_strndup(comment, inptr-comment); text = header_decode_string(tmp); name = g_string_new(text); g_free(tmp); g_free(text); } } *in = inptr; if (addr->len > 0) { address = header_address_new_name(name?name->str:"", addr->str); } g_string_free(addr, TRUE); if (name) g_string_free(name, TRUE); d(printf("got mailbox: %s\n", addr->str)); return address; } static struct _header_address * header_decode_address(const char **in) { const char *inptr = *in; char *pre; GString *group = g_string_new(""); struct _header_address *addr = NULL, *member; /* pre-scan, trying to work out format, discard results */ header_decode_lwsp(&inptr); while ( (pre = header_decode_word(&inptr)) ) { group = g_string_append(group, pre); group = g_string_append(group, " "); g_free(pre); } header_decode_lwsp(&inptr); if (*inptr == ':') { d(printf("group detected: %s\n", group->str)); addr = header_address_new_group(group->str); /* that was a group spec, scan mailbox's */ inptr++; /* FIXME: check rfc 2047 encodings of words, here or above in the loop */ header_decode_lwsp(&inptr); if (*inptr != ';') { int go = TRUE; do { member = header_decode_mailbox(&inptr); if (member) header_address_add_member(addr, member); header_decode_lwsp(&inptr); if (*inptr == ',') inptr++; else go = FALSE; } while (go); if (*inptr == ';') { inptr++; } else { w(g_warning("Invalid group spec, missing closing ';': %s", *in)); } } else { inptr++; } *in = inptr; } else { addr = header_decode_mailbox(in); } g_string_free(group, TRUE); return addr; } static char * header_msgid_decode_internal(const char **in) { const char *inptr = *in; char *msgid = NULL; d(printf("decoding Message-ID: '%s'\n", *in)); header_decode_lwsp(&inptr); if (*inptr == '<') { inptr++; header_decode_lwsp(&inptr); msgid = header_decode_addrspec(&inptr); if (msgid) { header_decode_lwsp(&inptr); if (*inptr == '>') { inptr++; } else { w(g_warning("Missing closing '>' on message id: %s", *in)); } } else { w(g_warning("Cannot find message id in: %s", *in)); } } else { w(g_warning("missing opening '<' on message id: %s", *in)); } *in = inptr; return msgid; } char * header_msgid_decode(const char *in) { if (in == NULL) return NULL; return header_msgid_decode_internal(&in); } void header_references_list_append_asis(struct _header_references **list, char *ref) { struct _header_references *w = (struct _header_references *)list, *n; while (w->next) w = w->next; n = g_malloc(sizeof(*n)); n->id = ref; n->next = 0; w->next = n; } int header_references_list_size(struct _header_references **list) { int count = 0; struct _header_references *w = *list; while (w) { count++; w = w->next; } return count; } void header_references_list_clear(struct _header_references **list) { struct _header_references *w = *list, *n; while (w) { n = w->next; g_free(w->id); g_free(w); w = n; } *list = NULL; } /* generate a list of references, from most recent up */ struct _header_references * header_references_decode(const char *in) { const char *inptr = in; struct _header_references *head = NULL, *node; char *id, *word; if (in == NULL || in[0] == '\0') return NULL; while (*inptr) { header_decode_lwsp(&inptr); if (*inptr == '<') { id = header_msgid_decode_internal(&inptr); if (id) { node = g_malloc(sizeof(*node)); node->next = head; head = node; node->id = id; } } else { word = header_decode_word(&inptr); if (word) g_free (word); else if (*inptr != '\0') inptr++; /* Stupid mailer tricks */ } } return head; } struct _header_references * header_references_dup(const struct _header_references *list) { struct _header_references *new = NULL, *tmp; while (list) { tmp = g_new(struct _header_references, 1); tmp->next = new; tmp->id = g_strdup(list->id); new = tmp; list = list->next; } return new; } struct _header_address * header_mailbox_decode(const char *in) { if (in == NULL) return NULL; return header_decode_mailbox(&in); } struct _header_address * header_address_decode(const char *in) { const char *inptr = in, *last; struct _header_address *list = NULL, *addr; d(printf("decoding To: '%s'\n", in)); if (in == NULL) return NULL; do { last = inptr; addr = header_decode_address(&inptr); if (addr) header_address_list_append(&list, addr); header_decode_lwsp(&inptr); if (*inptr == ',') inptr++; else break; } while (inptr != last); if (*inptr) { w(g_warning("Invalid input detected at %c (%d): %s\n or at: %s", *inptr, inptr-in, in, inptr)); } if (inptr == last) { w(g_warning("detected invalid input loop at : %s", last)); } return list; } void header_mime_decode(const char *in, int *maj, int *min) { const char *inptr = in; int major=-1, minor=-1; d(printf("decoding MIME-Version: '%s'\n", in)); if (in != NULL) { header_decode_lwsp(&inptr); if (isdigit(*inptr)) { major = header_decode_int(&inptr); header_decode_lwsp(&inptr); if (*inptr == '.') { inptr++; header_decode_lwsp(&inptr); if (isdigit(*inptr)) minor = header_decode_int(&inptr); } } } if (maj) *maj = major; if (min) *min = minor; d(printf("major = %d, minor = %d\n", major, minor)); } static struct _header_param * header_param_list_decode(const char **in) { const char *inptr = *in; struct _header_param *head = NULL, *tail = NULL; header_decode_lwsp(&inptr); while (*inptr == ';') { char *param, *value; struct _header_param *p; inptr++; /* invalid format? */ if (header_decode_param(&inptr, ¶m, &value) != 0) break; p = g_malloc(sizeof(*p)); p->name = param; p->value = value; p->next = NULL; if (head == NULL) head = p; if (tail) tail->next = p; tail = p; header_decode_lwsp(&inptr); } *in = inptr; return head; } static void header_param_list_format_append(GString *out, struct _header_param *p) { int len = out->len; while (p) { int here = out->len; if (len+strlen(p->name)+strlen(p->value)>60) { out = g_string_append(out, "\n\t"); len = 0; } /* FIXME: format the value properly */ g_string_sprintfa(out, " ; %s=\"%s\"", p->name, p->value); len += (out->len - here); p = p->next; } } struct _header_content_type * header_content_type_decode(const char *in) { const char *inptr = in; char *type, *subtype = NULL; struct _header_content_type *t = NULL; if (in==NULL) return NULL; type = decode_token(&inptr); header_decode_lwsp(&inptr); if (type) { if (*inptr == '/') { inptr++; subtype = decode_token(&inptr); } if (subtype == NULL && (!strcasecmp(type, "text"))) { w(g_warning("text type with no subtype, resorting to text/plain: %s", in)); subtype = g_strdup("plain"); } if (subtype == NULL) { w(g_warning("MIME type with no subtype: %s", in)); } t = header_content_type_new(type, subtype); t->params = header_param_list_decode(&inptr); g_free(type); g_free(subtype); } else { g_free(type); d(printf("cannot find MIME type in header (2) '%s'", in)); } return t; } void header_content_type_dump(struct _header_content_type *ct) { struct _header_param *p; printf("Content-Type: "); if (ct==NULL) { printf("\n"); return; } printf("%s / %s", ct->type, ct->subtype); p = ct->params; if (p) { while (p) { printf(";\n\t%s=\"%s\"", p->name, p->value); p = p->next; } } printf("\n"); } char * header_content_type_format(struct _header_content_type *ct) { GString *out; char *ret; if (ct==NULL) return NULL; out = g_string_new(""); if (ct->type == NULL) { g_string_sprintfa(out, "text/plain"); w(g_warning("Content-Type with no main type")); } else if (ct->subtype == NULL) { w(g_warning("Content-Type with no sub type: %s", ct->type)); if (!strcasecmp(ct->type, "multipart")) g_string_sprintfa(out, "%s/mixed", ct->type); else g_string_sprintfa(out, "%s", ct->type); } else { g_string_sprintfa(out, "%s/%s", ct->type, ct->subtype); } header_param_list_format_append(out, ct->params); ret = out->str; g_string_free(out, FALSE); return ret; } char * header_content_encoding_decode(const char *in) { if (in) return decode_token(&in); return NULL; } CamelMimeDisposition *header_disposition_decode(const char *in) { CamelMimeDisposition *d = NULL; const char *inptr = in; if (in == NULL) return NULL; d = g_malloc(sizeof(*d)); d->refcount = 1; d->disposition = decode_token(&inptr); if (d->disposition == NULL) w(g_warning("Empty disposition type")); d->params = header_param_list_decode(&inptr); return d; } void header_disposition_ref(CamelMimeDisposition *d) { if (d) d->refcount++; } void header_disposition_unref(CamelMimeDisposition *d) { if (d) { if (d->refcount<=1) { header_param_list_free(d->params); g_free(d->disposition); g_free(d); } else { d->refcount--; } } } char *header_disposition_format(CamelMimeDisposition *d) { GString *out; char *ret; if (d==NULL) return NULL; out = g_string_new(""); if (d->disposition) out = g_string_append(out, d->disposition); else out = g_string_append(out, "attachment"); header_param_list_format_append(out, d->params); ret = out->str; g_string_free(out, FALSE); return ret; } /* hrm, is there a library for this shit? */ static struct { char *name; int offset; } tz_offsets [] = { { "UT", 0 }, { "GMT", 0 }, { "EST", -500 }, /* these are all US timezones. bloody yanks */ { "EDT", -400 }, { "CST", -600 }, { "CDT", -500 }, { "MST", -700 }, { "MDT", -600 }, { "PST", -800 }, { "PDT", -700 }, { "Z", 0 }, { "A", -100 }, { "M", -1200 }, { "N", 100 }, { "Y", 1200 }, }; static char *tz_months [] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; char * header_format_date(time_t time, int offset) { struct tm tm; d(printf("offset = %d\n", offset)); d(printf("converting date %s", ctime(&time))); time += ((offset / 100) * (60*60)) + (offset % 100)*60; d(printf("converting date %s", ctime(&time))); memcpy(&tm, gmtime(&time), sizeof(tm)); return g_strdup_printf("%02d %s %04d %02d:%02d:%02d %+05d", tm.tm_mday, tz_months[tm.tm_mon], tm.tm_year + 1900, tm.tm_hour, tm.tm_min, tm.tm_sec, offset); } /* convert a date to time_t representation */ /* this is an awful mess oh well */ time_t header_decode_date(const char *in, int *saveoffset) { const char *inptr = in; char *monthname; int year, offset = 0; struct tm tm; int i; time_t t; if (in == NULL) { if (saveoffset) *saveoffset = 0; return 0; } d(printf ("\ndecoding date '%s'\n", inptr)); memset (&tm, 0, sizeof(tm)); header_decode_lwsp (&inptr); if (!isdigit (*inptr)) { char *day = decode_token (&inptr); /* we dont really care about the day, its only for display */ if (day) { d(printf ("got day: %s\n", day)); g_free (day); header_decode_lwsp (&inptr); if (*inptr == ',') { inptr++; } else { #ifndef CLEAN_DATE char *newdate; w(g_warning("day not followed by ',' its probably a broken mail client, so we'll ignore its date entirely")); printf ("Giving it one last chance...\n"); newdate = parse_broken_date (in); if (newdate) { printf ("Got: %s\n", newdate); t = header_decode_date (newdate, saveoffset); g_free (newdate); return t; } #endif if (saveoffset) *saveoffset = 0; return 0; } } } tm.tm_mday = header_decode_int(&inptr); monthname = decode_token(&inptr); if (monthname) { for (i=0;ivalue; while (p && *p) { if (!isascii(*p)) { w(g_warning("Appending header violates rfc: %s: %s", h->name, h->value)); return; } p++; } } #endif void header_raw_append_parse(struct _header_raw **list, const char *header, int offset) { register const char *in; int fieldlen; char *name; in = header; while (is_fieldname(*in) || *in==':') in++; fieldlen = in-header; while (is_lwsp(*in)) in++; if (fieldlen == 0 || *in != ':') { printf("Invalid header line: '%s'\n", header); return; } in++; name = alloca(fieldlen+1); memcpy(name, header, fieldlen); name[fieldlen] = 0; header_raw_append(list, name, in, offset); } void header_raw_append(struct _header_raw **list, const char *name, const char *value, int offset) { struct _header_raw *l, *n; d(printf("Header: %s: %s\n", name, value)); n = g_malloc(sizeof(*n)); n->next = NULL; n->name = g_strdup(name); n->value = g_strdup(value); n->offset = offset; #ifdef CHECKS check_header(n); #endif l = (struct _header_raw *)list; while (l->next) { l = l->next; } l->next = n; /* debug */ #if 0 if (!strcasecmp(name, "To")) { printf("- Decoding To\n"); header_to_decode(value); } else if (!strcasecmp(name, "Content-type")) { printf("- Decoding content-type\n"); header_content_type_dump(header_content_type_decode(value)); } else if (!strcasecmp(name, "MIME-Version")) { printf("- Decoding mime version\n"); header_mime_decode(value); } #endif } static struct _header_raw * header_raw_find_node(struct _header_raw **list, const char *name) { struct _header_raw *l; l = *list; while (l) { if (!strcasecmp(l->name, name)) break; l = l->next; } return l; } const char * header_raw_find(struct _header_raw **list, const char *name, int *offset) { struct _header_raw *l; l = header_raw_find_node(list, name); if (l) { if (offset) *offset = l->offset; return l->value; } else return NULL; } const char * header_raw_find_next(struct _header_raw **list, const char *name, int *offset, const char *last) { struct _header_raw *l; if (last == NULL || name == NULL) return NULL; l = *list; while (l && l->value != last) l = l->next; return header_raw_find(&l, name, offset); } static void header_raw_free(struct _header_raw *l) { g_free(l->name); g_free(l->value); g_free(l); } void header_raw_remove(struct _header_raw **list, const char *name) { struct _header_raw *l, *p; /* the next pointer is at the head of the structure, so this is safe */ p = (struct _header_raw *)list; l = *list; while (l) { if (!strcasecmp(l->name, name)) { p->next = l->next; header_raw_free(l); l = p->next; } else { p = l; l = l->next; } } } void header_raw_replace(struct _header_raw **list, const char *name, const char *value, int offset) { header_raw_remove(list, name); header_raw_append(list, name, value, offset); } void header_raw_clear(struct _header_raw **list) { struct _header_raw *l, *n; l = *list; while (l) { n = l->next; header_raw_free(l); l = n; } *list = NULL; } /* ok, here's the address stuff, what a mess ... */ struct _header_address *header_address_new(void) { struct _header_address *h; h = g_malloc0(sizeof(*h)); h->type = HEADER_ADDRESS_NONE; h->refcount = 1; return h; } struct _header_address *header_address_new_name(const char *name, const char *addr) { struct _header_address *h; h = header_address_new(); h->type = HEADER_ADDRESS_NAME; h->name = g_strdup(name); h->v.addr = g_strdup(addr); return h; } struct _header_address *header_address_new_group(const char *name) { struct _header_address *h; h = header_address_new(); h->type = HEADER_ADDRESS_GROUP; h->name = g_strdup(name); return h; } void header_address_ref(struct _header_address *h) { if (h) h->refcount++; } void header_address_unref(struct _header_address *h) { if (h) { if (h->refcount <= 1) { if (h->type == HEADER_ADDRESS_GROUP) { header_address_list_clear(&h->v.members); } else if (h->type == HEADER_ADDRESS_NAME) { g_free(h->v.addr); } g_free(h->name); g_free(h); } else { h->refcount--; } } } void header_address_set_name(struct _header_address *h, const char *name) { if (h) { g_free(h->name); h->name = g_strdup(name); } } void header_address_set_addr(struct _header_address *h, const char *addr) { if (h) { if (h->type == HEADER_ADDRESS_NAME || h->type == HEADER_ADDRESS_NONE) { h->type = HEADER_ADDRESS_NAME; g_free(h->v.addr); h->v.addr = g_strdup(addr); } else { g_warning("Trying to set the address on a group"); } } } void header_address_set_members(struct _header_address *h, struct _header_address *group) { if (h) { if (h->type == HEADER_ADDRESS_GROUP || h->type == HEADER_ADDRESS_NONE) { h->type = HEADER_ADDRESS_GROUP; header_address_list_clear(&h->v.members); /* should this ref them? */ h->v.members = group; } else { g_warning("Trying to set the members on a name, not group"); } } } void header_address_add_member(struct _header_address *h, struct _header_address *member) { if (h) { if (h->type == HEADER_ADDRESS_GROUP || h->type == HEADER_ADDRESS_NONE) { h->type = HEADER_ADDRESS_GROUP; header_address_list_append(&h->v.members, member); } } } void header_address_list_append_list(struct _header_address **l, struct _header_address **h) { if (l) { struct _header_address *n = (struct _header_address *)l; while (n->next) n = n->next; n->next = *h; } } void header_address_list_append(struct _header_address **l, struct _header_address *h) { if (h) { header_address_list_append_list(l, &h); h->next = NULL; } } void header_address_list_clear(struct _header_address **l) { struct _header_address *a, *n; a = *l; while (a) { n = a->next; header_address_unref(a); a = n; } *l = NULL; } static void header_address_list_format_append(GString *out, struct _header_address *a) { char *text; while (a) { switch (a->type) { case HEADER_ADDRESS_NAME: text = header_encode_phrase (a->name); if (text && *text) g_string_sprintfa(out, "%s <%s>", text, a->v.addr); else g_string_append(out, a->v.addr); g_free (text); break; case HEADER_ADDRESS_GROUP: text = header_encode_string(a->name); g_string_sprintfa(out, "%s:\n ", text); header_address_list_format_append(out, a->v.members); g_string_sprintfa(out, ";"); break; default: g_warning("Invalid address type"); break; } a = a->next; if (a) g_string_append(out, ", "); } } /* FIXME: need a 'display friendly' version, as well as a 'rfc friendly' version? */ char * header_address_list_format(struct _header_address *a) { GString *out; char *ret; if (a == NULL) return NULL; out = g_string_new(""); header_address_list_format_append(out, a); ret = out->str; g_string_free(out, FALSE); return ret; } /* simple header folding */ /* note: assumes the input has not already been folded */ char * header_fold(const char *in) { int len, outlen, i; const char *inptr = in, *space; GString *out; char *ret; len = strlen(in); if (len <= CAMEL_FOLD_SIZE) return g_strdup(in); out = g_string_new(""); outlen = 0; while (*inptr) { space = strchr(inptr, ' '); if (space) { len = space-inptr+1; } else { len = strlen(inptr); } if (outlen + len > CAMEL_FOLD_SIZE) { g_string_append(out, "\n\t"); outlen = 1; /* check for very long words, just cut them up */ while (outlen+len > CAMEL_FOLD_SIZE) { for (i=0;istr; g_string_free(out, FALSE); return ret; } #ifdef BUILD_TABLE /* for debugging tests */ /* should also have some regression tests somewhere */ void test_phrase(const char *in) { printf("'%s' -> '%s'\n", in, header_encode_phrase(in)); } void test_fold(const char *in) { printf("'%s'\n ->\n '%s'\n", in, header_fold(in)); } void run_test(void) { char *to = "gnome hacker dudes: license-discuss@opensource.org, \"Richard M. Stallman\" , Barry Chester , Michael Zucchi , Miguel de Icaza ;, zucchi@zedzone.mmc.com.au, \"Foo bar\" , "; #if 0 header_to_decode(to); header_mime_decode("1.0", 0, 0); header_mime_decode("1.3 (produced by metasend V1.0)", 0, 0); header_mime_decode("(produced by metasend V1.0) 5.2", 0, 0); header_mime_decode("7(produced by metasend 1.0) . (produced by helix/send/1.0) 9 . 5", 0, 0); header_mime_decode("3.", 0, 0); header_mime_decode(".", 0, 0); header_mime_decode(".5", 0, 0); header_mime_decode("c.d", 0, 0); header_mime_decode("", 0, 0); header_msgid_decode(" <\"L3x2i1.0.Nm5.Xd-Wu\"@lists.redhat.com>"); header_msgid_decode("<200001180446.PAA02065@beaker.htb.com.au>"); #endif test_fold("Header: This is a long header that should be folded properly at the right place, or so i hope. I should probably set the fold value to something lower for testing"); test_fold("Header: nowletstryfoldingsomethingthatistoolongtofold,iwonderwhatitshoulddointsteadtofoldit?hmm,iguessicanjusttruncateitatsomepointortrytorefoldthepreviousstuff(yuck)tofit"); test_phrase("Michael Zucchi (NotZed)"); test_phrase("Zucchi, ( \\ NotZed \\ ) Michael"); { int ic; char *outbuf, *inbuf, buffer[256]; int inlen, outlen; outlen = 256; inbuf = "Dra¾en Kaèar"; inlen = strlen(inbuf); outbuf = buffer; ic = unicode_iconv_open("UTF-8", "ISO-8859-1"); unicode_iconv(ic, &inbuf, &inlen, &outbuf, &outlen); test_phrase(buffer); outlen = 256; inbuf = "Tomasz K³oczko"; inlen = strlen(inbuf); outbuf = buffer; ic = unicode_iconv_open("UTF-8", "ISO-8859-2"); unicode_iconv(ic, &inbuf, &inlen, &outbuf, &outlen); test_phrase(buffer); } } #endif /* BUILD_TABLE */