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Diffstat (limited to '')
-rw-r--r-- | src/lib-mail/quoted-printable.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/lib-mail/quoted-printable.c b/src/lib-mail/quoted-printable.c new file mode 100644 index 0000000..9bfbe35 --- /dev/null +++ b/src/lib-mail/quoted-printable.c @@ -0,0 +1,49 @@ +/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "buffer.h" +#include "hex-binary.h" +#include "quoted-printable.h" + +int quoted_printable_q_decode(const unsigned char *src, size_t src_size, + buffer_t *dest) +{ + char hexbuf[3]; + size_t src_pos, next; + bool errors = FALSE; + + hexbuf[2] = '\0'; + + next = 0; + for (src_pos = 0; src_pos < src_size; src_pos++) { + if (src[src_pos] != '_' && src[src_pos] != '=') + continue; + + buffer_append(dest, src + next, src_pos - next); + next = src_pos; + + if (src[src_pos] == '_') { + buffer_append_c(dest, ' '); + next++; + continue; + } + + if (src_pos+2 >= src_size) + break; + + /* =<hex> */ + hexbuf[0] = src[src_pos+1]; + hexbuf[1] = src[src_pos+2]; + + if (hex_to_binary(hexbuf, dest) == 0) { + src_pos += 2; + next = src_pos+1; + } else { + /* non-hex data, show as-is */ + errors = TRUE; + next = src_pos; + } + } + buffer_append(dest, src + next, src_size - next); + return errors ? -1 : 0; +} |