mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
fc1d88f02f
298 424 656 882 939 1630 1807 2263 2294 2311 2424 2623
2637 2686 2697 2921 2922 2940 3055 3112 3156 3177 3277
83 lines
1.9 KiB
Plaintext
83 lines
1.9 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
BIO_f_base64 - base64 BIO filter
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/bio.h>
|
|
#include <openssl/evp.h>
|
|
|
|
BIO_METHOD * BIO_f_base64(void);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
BIO_f_base64() returns the base64 BIO method. This is a filter
|
|
BIO that base64 encodes any data written through it and decodes
|
|
any data read through it.
|
|
|
|
Base64 BIOs do not support BIO_gets() or BIO_puts().
|
|
|
|
BIO_flush() on a base64 BIO that is being written through is
|
|
used to signal that no more data is to be encoded: this is used
|
|
to flush the final block through the BIO.
|
|
|
|
The flag BIO_FLAGS_BASE64_NO_NL can be set with BIO_set_flags()
|
|
to encode the data all on one line or expect the data to be all
|
|
on one line.
|
|
|
|
=head1 NOTES
|
|
|
|
Because of the format of base64 encoding the end of the encoded
|
|
block cannot always be reliably determined.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
BIO_f_base64() returns the base64 BIO method.
|
|
|
|
=head1 EXAMPLES
|
|
|
|
Base64 encode the string "Hello World\n" and write the result
|
|
to standard output:
|
|
|
|
BIO *bio, *b64;
|
|
char message[] = "Hello World \n";
|
|
|
|
b64 = BIO_new(BIO_f_base64());
|
|
bio = BIO_new_fp(stdout, BIO_NOCLOSE);
|
|
BIO_push(b64, bio);
|
|
BIO_write(b64, message, strlen(message));
|
|
BIO_flush(b64);
|
|
|
|
BIO_free_all(b64);
|
|
|
|
Read Base64 encoded data from standard input and write the decoded
|
|
data to standard output:
|
|
|
|
BIO *bio, *b64, *bio_out;
|
|
char inbuf[512];
|
|
int inlen;
|
|
|
|
b64 = BIO_new(BIO_f_base64());
|
|
bio = BIO_new_fp(stdin, BIO_NOCLOSE);
|
|
bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
|
|
BIO_push(b64, bio);
|
|
while((inlen = BIO_read(b64, inbuf, 512)) > 0)
|
|
BIO_write(bio_out, inbuf, inlen);
|
|
|
|
BIO_flush(bio_out);
|
|
BIO_free_all(b64);
|
|
|
|
=head1 BUGS
|
|
|
|
The ambiguity of EOF in base64 encoded data can cause additional
|
|
data following the base64 encoded block to be misinterpreted.
|
|
|
|
There should be some way of specifying a test that the BIO can perform
|
|
to reliably determine EOF (for example a MIME boundary).
|
|
|
|
=head1 SEE ALSO
|
|
|
|
TBA
|