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Support for sk-ecdsa-sha2-nistp256 and sk-ssh-ed25519 keys, FIDO (#698)

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Notes:
Add support for sk-ecdsa-sha2-nistp256@openssh.com and sk-ssh-ed25519@openssh.com key exchange for FIDO auth using the OpenSSL backend. Stub API for other backends.

Credit:
Michael Buckley
This commit is contained in:
Michael Buckley
2022-09-29 09:05:34 -07:00
committed by GitHub
parent ef292424bb
commit ed439a29bb
16 changed files with 1380 additions and 29 deletions
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24
src/misc.c
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@@ -243,6 +243,30 @@ void _libssh2_store_str(unsigned char **buf, const char *str, size_t len)
}
}
/* _libssh2_store_bignum2_bytes
*/
void _libssh2_store_bignum2_bytes(unsigned char **buf,
const unsigned char *bytes,
size_t len)
{
int extraByte = 0;
const unsigned char *p;
for(p = bytes; len > 0 && *p == 0; --len, ++p) {}
extraByte = (len > 0 && (p[0] & 0x80) != 0);
_libssh2_store_u32(buf, len + extraByte);
if(extraByte) {
*buf[0] = 0;
*buf += 1;
}
if(len > 0) {
memcpy(*buf, p, len);
*buf += len;
}
}
/* Base64 Conversion */
static const short base64_reverse_table[256] = {