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added -C to generate a blake2 checksum of one or more files

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git@daemon.de
2015-07-17 16:22:12 +02:00
parent 6dfb15ade6
commit 0811957a46
12 changed files with 114 additions and 14 deletions
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26
libpcp/crypto.c
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@@ -811,3 +811,29 @@ TODO: how to go past 64 bits:
http://mrob.com/pub/math/int128.c.txt
http://locklessinc.com/articles/256bit_arithmetic/
*/
int pcp_checksum(PCPCTX *ptx, Pcpstream *in, byte *checksum) {
crypto_generichash_state *st = ucmalloc(sizeof(crypto_generichash_state));
byte *buf = ucmalloc(PCP_BLOCK_SIZE);
size_t bufsize = 0;
int ret = 1;
crypto_generichash_init(st, NULL, 0, 0);
while(!ps_end(in)) {
bufsize = ps_read(in, buf, PCP_BLOCK_SIZE);
crypto_generichash_update(st, buf, bufsize);
}
crypto_generichash_final(st, checksum, crypto_generichash_BYTES_MAX);
if(ps_err(in)) {
ret = 0;
fatal(ptx, "Error while reading file!\n");
}
free(st);
free(buf);
return ret;
}