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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.
38 lines
842 B
C
38 lines
842 B
C
#include "misc.h"
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void base64_decode_bs(BinarySink *bs, ptrlen input)
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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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while (get_avail(src)) {
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char b64atom[4];
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unsigned char binatom[3];
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for (size_t i = 0; i < 4 ;) {
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char c = get_byte(src);
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if (get_err(src))
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c = '=';
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if (c == '\n' || c == '\r')
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continue;
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b64atom[i++] = c;
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}
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put_data(bs, binatom, base64_decode_atom(b64atom, binatom));
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}
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}
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void base64_decode_fp(FILE *fp, ptrlen input)
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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_decode_bs(BinarySink_UPCAST(&ss), input);
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}
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strbuf *base64_decode_sb(ptrlen input)
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{
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strbuf *sb = strbuf_new_nm();
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base64_decode_bs(BinarySink_UPCAST(sb), input);
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return sb;
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}
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