1 /* ISC license. */
2
3 #include <string.h>
4 #include <skalibs/sha512.h>
5 #include "sha512-internal.h"
6
sha512_update(SHA512Schedule * ctx,char const * buf,size_t len)7 void sha512_update (SHA512Schedule *ctx, char const *buf, size_t len)
8 {
9 unsigned int pad = ctx->len & 0x7fU ;
10 ctx->len += len ;
11 if (pad && len >= 128 - pad)
12 {
13 memcpy((char *)ctx->buf + pad, buf, 128 - pad) ;
14 buf += 128 - pad ; len -= 128 - pad ; pad = 0 ;
15 sha512_transform(ctx, ctx->buf) ;
16 }
17
18 while (len >= 128)
19 {
20 sha512_transform(ctx, (unsigned char const *)buf) ;
21 buf += 128 ; len -= 128 ;
22 }
23 memcpy((char *)ctx->buf + pad, buf, len) ;
24 }
25