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Issue #26798: Coverity complains about potential memcpy() of overlapped regions. It doesn't hurt to use memmove() here. CID 1372514 / CID 1372515. Upstream https://github.com/BLAKE2/BLAKE2/issues/32

This commit is contained in:
Christian Heimes 2016-09-08 13:40:25 +02:00
parent cf45ee10fb
commit 5940c535b0
4 changed files with 4 additions and 4 deletions
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2
Modules/_blake2/impl/blake2b-ref.c
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@ -334,7 +334,7 @@ int blake2b_final( blake2b_state *S, uint8_t *out, uint8_t outlen )
blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
blake2b_compress( S, S->buf );
S->buflen -= BLAKE2B_BLOCKBYTES;
memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
memmove( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
}
blake2b_increment_counter( S, S->buflen );

2
Modules/_blake2/impl/blake2b.c
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@ -371,7 +371,7 @@ int blake2b_final( blake2b_state *S, uint8_t *out, uint8_t outlen )
blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
blake2b_compress( S, S->buf );
S->buflen -= BLAKE2B_BLOCKBYTES;
memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
memmove( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
}
blake2b_increment_counter( S, S->buflen );

2
Modules/_blake2/impl/blake2s-ref.c
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@ -325,7 +325,7 @@ int blake2s_final( blake2s_state *S, uint8_t *out, uint8_t outlen )
blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
blake2s_compress( S, S->buf );
S->buflen -= BLAKE2S_BLOCKBYTES;
memcpy( S->buf, S->buf + BLAKE2S_BLOCKBYTES, S->buflen );
memmove( S->buf, S->buf + BLAKE2S_BLOCKBYTES, S->buflen );
}
blake2s_increment_counter( S, ( uint32_t )S->buflen );

2
Modules/_blake2/impl/blake2s.c
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@ -348,7 +348,7 @@ int blake2s_final( blake2s_state *S, uint8_t *out, uint8_t outlen )
blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
blake2s_compress( S, S->buf );
S->buflen -= BLAKE2S_BLOCKBYTES;
memcpy( S->buf, S->buf + BLAKE2S_BLOCKBYTES, S->buflen );
memmove( S->buf, S->buf + BLAKE2S_BLOCKBYTES, S->buflen );
}
blake2s_increment_counter( S, ( uint32_t )S->buflen );