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gpgsm: Allow arbitrary extensions for cert creation.

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* sm/certreqgen.c (pSUBJKEYID, pEXTENSION): New.
(read_parameters): Add new keywords.
(proc_parameters): Check values of new keywords.
(create_request): Add SubjectKeyId and extensions.
(parse_parameter_usage): Support "cert" and the encrypt alias "encr".
This commit is contained in:
Werner Koch 2011-12-06 19:57:27 +01:00
parent 3f284e4050
commit 5cdad8ff00
4 changed files with 187 additions and 5 deletions
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1
doc/DETAILS
View File

@ -1036,6 +1036,7 @@ OIDs below the GnuPG arc:
1.3.6.1.4.1.11591.2.1.1 pkaAddress
1.3.6.1.4.1.11591.2.2 X.509 extensions
1.3.6.1.4.1.11591.2.2.1 standaloneCertificate
1.3.6.1.4.1.11591.2.2.2 wellKnownPrivateKey
1.3.6.1.4.1.11591.2.12242973 invalid encoded OID

6
doc/gpgsm.texi
View File

@ -1042,9 +1042,9 @@ already existing key. Key-Length will be ignored when given.
@item Key-Usage: @var{usage-list}
Space or comma delimited list of key usage, allowed values are
@samp{encrypt} and @samp{sign}. This is used to generate the keyUsage
extension. Please make sure that the algorithm is capable of this
usage. Default is to allow encrypt and sign.
@samp{encrypt}, @samp{sign} and @samp{cert}. This is used to generate
the keyUsage extension. Please make sure that the algorithm is
capable of this usage. Default is to allow encrypt and sign.
@item Name-DN: @var{subject-name}
This is the Distinguished Name (DN) of the subject in RFC-2253 format.

184
sm/certreqgen.c
View File

@ -33,6 +33,22 @@
%commit
%echo done
EOF
This parameter file was used to create the STEED CA:
Key-Type: RSA
Key-Length: 1024
Key-Grip: 68A638998DFABAC510EA645CE34F9686B2EDF7EA
Key-Usage: cert
Serial: 1
Name-DN: CN=The STEED Self-Signing Nonthority
Not-Before: 2011-11-11
Not-After: 2106-02-06
Subject-Key-Id: 68A638998DFABAC510EA645CE34F9686B2EDF7EA
Extension: 2.5.29.19 c 30060101ff020101
Extension: 1.3.6.1.4.1.11591.2.2.2 n 0101ff
Signing-Key: 68A638998DFABAC510EA645CE34F9686B2EDF7EA
%commit
*/
@ -68,7 +84,9 @@ enum para_name
pNOTBEFORE,
pNOTAFTER,
pSIGNINGKEY,
pHASHALGO
pHASHALGO,
pSUBJKEYID,
pEXTENSION
};
struct para_data_s
@ -89,6 +107,7 @@ struct reqgen_ctrl_s
};
static const char oidstr_subjectKeyIdentifier[] = "2.5.29.14";
static const char oidstr_keyUsage[] = "2.5.29.15";
static const char oidstr_basicConstraints[] = "2.5.29.19";
static const char oidstr_standaloneCertificate[] = "1.3.6.1.4.1.11591.2.2.1";
@ -170,8 +189,11 @@ parse_parameter_usage (struct para_data_s *para, enum para_name key)
;
else if ( !ascii_strcasecmp (p, "sign") )
use |= GCRY_PK_USAGE_SIGN;
else if ( !ascii_strcasecmp (p, "encrypt") )
else if ( !ascii_strcasecmp (p, "encrypt")
|| !ascii_strcasecmp (p, "encr") )
use |= GCRY_PK_USAGE_ENCR;
else if ( !ascii_strcasecmp (p, "cert") )
use |= GCRY_PK_USAGE_CERT;
else
{
log_error ("line %d: invalid usage list\n", r->lnr);
@ -225,6 +247,8 @@ read_parameters (ctrl_t ctrl, estream_t fp, estream_t out_fp)
{ "Not-After", pNOTAFTER },
{ "Signing-Key", pSIGNINGKEY },
{ "Hash-Algo", pHASHALGO },
{ "Subject-Key-Id", pSUBJKEYID },
{ "Extension", pEXTENSION, 1 },
{ NULL, 0 }
};
char line[1024], *p;
@ -594,6 +618,59 @@ proc_parameters (ctrl_t ctrl, struct para_data_s *para,
}
}
/* Check the optional SubjectKeyId. */
string = get_parameter_value (para, pSUBJKEYID, 0);
if (string)
{
for (s=string, i=0; hexdigitp (s); s++, i++)
;
if (*s || (i&1))
{
r = get_parameter (para, pSUBJKEYID, 0);
log_error (_("line %d: invalid subject-key-id\n"), r->lnr);
xfree (cardkeyid);
return gpg_error (GPG_ERR_INV_PARAMETER);
}
}
/* Check the optional extensions. */
for (seq=0; (string=get_parameter_value (para, pEXTENSION, seq)); seq++)
{
int okay = 0;
s = strpbrk (string, " \t:");
if (s)
{
s++;
while (spacep (s))
s++;
if (*s && strchr ("nNcC", *s))
{
s++;
while (spacep (s))
s++;
if (*s == ':')
s++;
if (*s)
{
while (spacep (s))
s++;
for (i=0; hexdigitp (s); s++, i++)
;
if (!((*s && *s != ':') || !i || (i&1)))
okay = 1;
}
}
}
if (!okay)
{
r = get_parameter (para, pEXTENSION, seq);
log_error (_("line %d: invalid extension syntax\n"), r->lnr);
xfree (cardkeyid);
return gpg_error (GPG_ERR_INV_PARAMETER);
}
}
/* Create or retrieve the public key. */
if (cardkeyid) /* Take the key from the current smart card. */
{
@ -838,6 +915,14 @@ create_request (ctrl_t ctrl,
err = ksba_certreq_add_extension (cr, oidstr_keyUsage, 1,
"\x03\x02\x04\x30", 4);
}
else if (use == GCRY_PK_USAGE_CERT)
{
/* For certify only we encode the bits:
KSBA_KEYUSAGE_KEY_CERT_SIGN
KSBA_KEYUSAGE_CRL_SIGN */
err = ksba_certreq_add_extension (cr, oidstr_keyUsage, 1,
"\x03\x02\x01\x06", 4);
}
else
err = 0; /* Both or none given: don't request one. */
if (err)
@ -1009,6 +1094,101 @@ create_request (ctrl_t ctrl,
goto leave;
}
}
/* Insert the SubjectKeyId. */
string = get_parameter_value (para, pSUBJKEYID, 0);
if (string)
{
char *hexbuf;
/* Allocate a buffer for in-place conversion. We also add 2
extra bytes space for the tag and length field. */
hexbuf = xtrymalloc (2 + strlen (string) + 1);
if (!hexbuf)
{
err = gpg_error_from_syserror ();
goto leave;
}
strcpy (hexbuf+2, string);
for (p=hexbuf+2, len=0; p[0] && p[1]; p += 2)
((unsigned char*)hexbuf)[2+len++] = xtoi_2 (p);
if (len > 127)
{
err = gpg_error (GPG_ERR_TOO_LARGE);
xfree (hexbuf);
goto leave;
}
hexbuf[0] = 0x04; /* Tag for an Octet string. */
hexbuf[1] = len;
err = ksba_certreq_add_extension (cr, oidstr_subjectKeyIdentifier, 0,
hexbuf, 2+len);
xfree (hexbuf);
if (err)
{
log_error ("error setting the subject-key-id: %s\n",
gpg_strerror (err));
goto leave;
}
}
/* Insert additional extensions. */
for (seq=0; (string = get_parameter_value (para, pEXTENSION, seq)); seq++)
{
char *hexbuf;
char *oidstr;
int crit = 0;
s = strpbrk (string, " \t:");
if (!s)
{
err = gpg_error (GPG_ERR_INTERNAL);
goto leave;
}
oidstr = xtrymalloc (s - string + 1);
if (!oidstr)
{
err = gpg_error_from_syserror ();
goto leave;
}
memcpy (oidstr, string, (s-string));
oidstr[(s-string)] = 0;
s++;
while (spacep (s))
s++;
if (!*s)
{
err = gpg_error (GPG_ERR_INTERNAL);
xfree (oidstr);
goto leave;
}
if (strchr ("cC", *s))
crit = 1;
s++;
while (spacep (s))
s++;
if (*s == ':')
s++;
while (spacep (s))
s++;
hexbuf = xtrystrdup (s);
if (!hexbuf)
{
err = gpg_error_from_syserror ();
xfree (oidstr);
goto leave;
}
for (p=hexbuf, len=0; p[0] && p[1]; p += 2)
((unsigned char*)hexbuf)[len++] = xtoi_2 (p);
err = ksba_certreq_add_extension (cr, oidstr, crit,
hexbuf, len);
xfree (oidstr);
xfree (hexbuf);
}
}
else
sigkey = public;

1
sm/keylist.c
View File

@ -187,6 +187,7 @@ static struct
/* GnuPG extensions */
{ "1.3.6.1.4.1.11591.2.1.1", "pkaAddress" },
{ "1.3.6.1.4.1.11591.2.2.1", "standaloneCertificate" },
{ "1.3.6.1.4.1.11591.2.2.2", "wellKnownPrivateKey" },
/* Extensions used by the Bundesnetzagentur. */
{ "1.3.6.1.4.1.8301.3.5", "validityModel" },