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fingerprints and self signatures added

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This commit is contained in:
Werner Koch 1997-12-09 12:46:23 +00:00
parent 3b1b6f9d98
commit 935965049d
23 changed files with 783 additions and 444 deletions
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107
g10/keyid.c
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@ -171,3 +171,110 @@ datestr_from_sig( PKT_signature *sig )
return buffer;
}
/**************** .
* Return a byte array with the fingerprint for the given PKC/SKC
* The length of the array is returned in ret_len. Caller must free
* the array.
*/
byte *
fingerprint_from_skc( PKT_secret_cert *skc, size_t *ret_len )
{
PKT_public_cert pkc;
byte *p;
pkc.pubkey_algo = skc->pubkey_algo;
if( pkc.pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
pkc.timestamp = skc->timestamp;
pkc.valid_days = skc->valid_days;
pkc.pubkey_algo = skc->pubkey_algo;
pkc.d.elg.p = skc->d.elg.p;
pkc.d.elg.g = skc->d.elg.g;
pkc.d.elg.y = skc->d.elg.y;
}
else if( pkc.pubkey_algo == PUBKEY_ALGO_RSA ) {
pkc.d.rsa.rsa_n = skc->d.rsa.rsa_n;
pkc.d.rsa.rsa_e = skc->d.rsa.rsa_e;
}
p = fingerprint_from_pkc( &pkc, ret_len );
memset(&pkc, 0, sizeof pkc); /* not really needed */
return p;
}
byte *
fingerprint_from_pkc( PKT_public_cert *pkc, size_t *ret_len )
{
byte *p, *buf, *array;
size_t len;
unsigned n;
if( pkc->pubkey_algo == PUBKEY_ALGO_ELGAMAL ) {
RMDHANDLE md;
const char *dp;
md = rmd160_open(0);
{ u32 a = pkc->timestamp;
rmd160_putchar( md, a >> 24 );
rmd160_putchar( md, a >> 16 );
rmd160_putchar( md, a >> 8 );
rmd160_putchar( md, a );
}
{ u16 a = pkc->valid_days;
rmd160_putchar( md, a >> 8 );
rmd160_putchar( md, a );
}
rmd160_putchar( md, pkc->pubkey_algo );
p = buf = mpi_get_buffer( pkc->d.elg.p, &n, NULL );
for( ; !*p && n; p++, n-- )
;
rmd160_putchar( md, n>>8); rmd160_putchar( md, n ); rmd160_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( pkc->d.elg.g, &n, NULL );
for( ; !*p && n; p++, n-- )
;
rmd160_putchar( md, n>>8); rmd160_putchar( md, n ); rmd160_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( pkc->d.elg.y, &n, NULL );
for( ; !*p && n; p++, n-- )
;
rmd160_putchar( md, n>>8); rmd160_putchar( md, n ); rmd160_write( md, p, n );
m_free(buf);
dp = rmd160_final(md);
array = m_alloc( 20 );
len = 20;
memcpy(array, dp, 20 );
rmd160_close(md);
}
else if( pkc->pubkey_algo == PUBKEY_ALGO_RSA ) {
MD5HANDLE md;
md = md5_open(0);
p = buf = mpi_get_buffer( pkc->d.rsa.rsa_n, &n, NULL );
for( ; !*p && n; p++, n-- )
;
md5_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( pkc->d.rsa.rsa_e, &n, NULL );
for( ; !*p && n; p++, n-- )
;
md5_write( md, p, n );
m_free(buf);
md5_final(md);
array = m_alloc( 16 );
len = 16;
memcpy(array, md5_read(md), 16 );
md5_close(md);
}
else {
array = m_alloc(1);
len = 0; /* ooops */
}
*ret_len = len;
return array;
}