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043c24844a
The low-level functions to handle a single atom of base64 at a time have been in 'utils' / misc.h for ages, but the higher-level family of base64_encode functions that handle a whole data block were hidden away in sshpubk.c, and there was no higher-level decode function at all. Now moved both into 'utils' modules and declared them in misc.h rather than ssh.h. Also, improved the APIs: they all take ptrlen in place of separate data and length arguments, their naming is more consistent and more explicit (the previous base64_encode which didn't name its destination is now base64_encode_fp), and the encode functions now accept cpl == 0 as a special case meaning that the output base64 data is wanted in the form of an unbroken single-line string with no trailing \n.
41 lines
1008 B
C
41 lines
1008 B
C
#include "misc.h"
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void base64_encode_bs(BinarySink *bs, ptrlen input, int cpl)
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{
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BinarySource src[1];
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BinarySource_BARE_INIT_PL(src, input);
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int linelen = 0;
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while (get_avail(src)) {
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size_t n = get_avail(src) < 3 ? get_avail(src) : 3;
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ptrlen binatom = get_data(src, n);
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char b64atom[4];
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base64_encode_atom(binatom.ptr, binatom.len, b64atom);
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for (size_t i = 0; i < 4; i++) {
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if (cpl > 0 && linelen >= cpl) {
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linelen = 0;
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put_byte(bs, '\n');
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}
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put_byte(bs, b64atom[i]);
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linelen++;
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}
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}
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if (cpl > 0)
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put_byte(bs, '\n');
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}
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void base64_encode_fp(FILE *fp, ptrlen input, int cpl)
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{
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stdio_sink ss;
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stdio_sink_init(&ss, fp);
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base64_encode_bs(BinarySink_UPCAST(&ss), input, cpl);
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}
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strbuf *base64_encode_sb(ptrlen input, int cpl)
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{
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strbuf *sb = strbuf_new_nm();
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base64_encode_bs(BinarySink_UPCAST(sb), input, cpl);
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return sb;
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}
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