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avoid calling memcpy with length 0

This commit is contained in:
Frank Morgner 2020-01-31 22:23:37 +01:00
parent 3687f71bf7
commit 723176d62f
1 changed files with 4 additions and 2 deletions
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6
src/libopensc/asn1.c
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@ -2154,8 +2154,10 @@ sc_asn1_sig_value_sequence_to_rs(struct sc_context *ctx, const unsigned char *in
}
memset(buf, 0, buflen);
memcpy(buf + (halflen - r_len), r, r_len);
memcpy(buf + (buflen - s_len), s, s_len);
if (r_len > 0)
memcpy(buf + (halflen - r_len), r, r_len);
if (s_len > 0)
memcpy(buf + (buflen - s_len), s, s_len);
sc_log(ctx, "r(%"SC_FORMAT_LEN_SIZE_T"u): %s", halflen,
sc_dump_hex(buf, halflen));