lib/libssh2
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Support DSA verifications.

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This commit is contained in:
Simon Josefsson
2007-01-18 07:51:41 +00:00
parent 50d587e2bc
commit e1bebf979b
5 changed files with 154 additions and 31 deletions
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54
src/openssl.c
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@@ -37,17 +37,18 @@
#include "openssl.h"
void _libssh2_rsa_new(libssh2_rsa_ctx **rsa,
const unsigned char *edata,
unsigned long elen,
const unsigned char *ndata,
unsigned long nlen)
int _libssh2_rsa_new(libssh2_rsa_ctx **rsa,
const unsigned char *edata,
unsigned long elen,
const unsigned char *ndata,
unsigned long nlen)
{
*rsa = RSA_new();
(*rsa)->e = BN_new();
BN_bin2bn(edata, elen, (*rsa)->e);
(*rsa)->n = BN_new();
BN_bin2bn(ndata, nlen, (*rsa)->n);
return 0;
}
int _libssh2_rsa_sha1_verify(libssh2_rsa_ctx *rsactx,
@@ -64,3 +65,46 @@ int _libssh2_rsa_sha1_verify(libssh2_rsa_ctx *rsactx,
(unsigned char *)sig, sig_len, rsactx);
return (ret == 1) ? 0 : -1;
}
int _libssh2_dsa_new(libssh2_dsa_ctx **dsactx,
const unsigned char *p,
unsigned long p_len,
const unsigned char *q,
unsigned long q_len,
const unsigned char *g,
unsigned long g_len,
const unsigned char *y,
unsigned long y_len)
{
*dsactx = DSA_new();
(*dsactx)->p = BN_new();
BN_bin2bn(p, p_len, (*dsactx)->p);
(*dsactx)->q = BN_new();
BN_bin2bn(q, q_len, (*dsactx)->q);
(*dsactx)->g = BN_new();
BN_bin2bn(g, g_len, (*dsactx)->g);
(*dsactx)->pub_key = BN_new();
BN_bin2bn(y, y_len, (*dsactx)->pub_key);
return 0;
}
int _libssh2_dsa_sha1_verify(libssh2_dsa_ctx *dsactx,
const unsigned char *sig,
unsigned long sig_len,
const unsigned char *m,
unsigned long m_len)
{
unsigned char hash[SHA_DIGEST_LENGTH];
DSA_SIG dsasig;
int ret;
dsasig.r = BN_new();
BN_bin2bn(sig, 20, dsasig.r);
dsasig.s = BN_new();
BN_bin2bn(sig + 20, 20, dsasig.s);
libssh2_sha1(m, m_len, hash);
ret = DSA_do_verify(hash, SHA_DIGEST_LENGTH, &dsasig, dsactx);
return (ret == 1) ? 0 : -1;
}