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127.TH BIO_f_base64 3 "2010-11-16" "0.9.8p" "OpenSSL" 128.\" For nroff, turn off justification. Always turn off hyphenation; it makes 129.\" way too many mistakes in technical documents. 130.if n .ad l 131.nh |
132.SH "NAME" 133BIO_f_base64 \- base64 BIO filter 134.SH "SYNOPSIS" 135.IX Header "SYNOPSIS" 136.Vb 2 137\& #include <openssl/bio.h> 138\& #include <openssl/evp.h> |
139\& |
140\& BIO_METHOD * BIO_f_base64(void); 141.Ve 142.SH "DESCRIPTION" 143.IX Header "DESCRIPTION" 144\&\fIBIO_f_base64()\fR returns the base64 \s-1BIO\s0 method. This is a filter 145\&\s-1BIO\s0 that base64 encodes any data written through it and decodes 146any data read through it. 147.PP |
148Base64 BIOs do not support \fIBIO_gets()\fR or \fIBIO_puts()\fR. |
149.PP 150\&\fIBIO_flush()\fR on a base64 \s-1BIO\s0 that is being written through is 151used to signal that no more data is to be encoded: this is used 152to flush the final block through the \s-1BIO\s0. 153.PP 154The flag \s-1BIO_FLAGS_BASE64_NO_NL\s0 can be set with \fIBIO_set_flags()\fR 155to encode the data all on one line or expect the data to be all 156on one line. --- 7 unchanged lines hidden (view full) --- 164.SH "EXAMPLES" 165.IX Header "EXAMPLES" 166Base64 encode the string \*(L"Hello World\en\*(R" and write the result 167to standard output: 168.PP 169.Vb 2 170\& BIO *bio, *b64; 171\& char message[] = "Hello World \en"; |
172\& |
173\& b64 = BIO_new(BIO_f_base64()); 174\& bio = BIO_new_fp(stdout, BIO_NOCLOSE); 175\& bio = BIO_push(b64, bio); 176\& BIO_write(bio, message, strlen(message)); 177\& BIO_flush(bio); |
178\& |
179\& BIO_free_all(bio); 180.Ve 181.PP 182Read Base64 encoded data from standard input and write the decoded 183data to standard output: 184.PP 185.Vb 3 186\& BIO *bio, *b64, *bio_out; 187\& char inbuf[512]; 188\& int inlen; |
189\& |
190\& b64 = BIO_new(BIO_f_base64()); 191\& bio = BIO_new_fp(stdin, BIO_NOCLOSE); 192\& bio_out = BIO_new_fp(stdout, BIO_NOCLOSE); 193\& bio = BIO_push(b64, bio); 194\& while((inlen = BIO_read(bio, inbuf, 512)) > 0) 195\& BIO_write(bio_out, inbuf, inlen); |
196\& |
197\& BIO_free_all(bio); 198.Ve 199.SH "BUGS" 200.IX Header "BUGS" 201The ambiguity of \s-1EOF\s0 in base64 encoded data can cause additional 202data following the base64 encoded block to be misinterpreted. 203.PP 204There should be some way of specifying a test that the \s-1BIO\s0 can perform 205to reliably determine \s-1EOF\s0 (for example a \s-1MIME\s0 boundary). 206.SH "SEE ALSO" 207.IX Header "SEE ALSO" 208\&\s-1TBA\s0 |