/** \ingroup rpmio signature
 * \file rpmio/rpmpgp.c
 * Routines to handle RFC-2440 detached signatures.
 */

#include "system.h"
#include "rpmio_internal.h"
#include "debug.h"

/*@unchecked@*/
static int _debug = 0;

/*@unchecked@*/
static int _print = 0;

/*@unchecked@*/
/*@null@*/ static struct pgpDig_s * _dig = NULL;

/*@unchecked@*/
/*@null@*/ static struct pgpDigParams_s * _digp = NULL;

#ifdef	DYING
/* This is the unarmored RPM-GPG-KEY public key. */
const char * redhatPubKeyDSA = "\
mQGiBDfqVDgRBADBKr3Bl6PO8BQ0H8sJoD6p9U7Yyl7pjtZqioviPwXP+DCWd4u8\n\
HQzcxAZ57m8ssA1LK1Fx93coJhDzM130+p5BG9mYSWShLabR3N1KXdXQYYcowTOM\n\
GxdwYRGr1Spw8QydLhjVfU1VSl4xt6bupPbWJbyjkg5Z3P7BlUOUJmrx3wCgobNV\n\
EDGaWYJcch5z5B1of/41G8kEAKii6q7Gu/vhXXnLS6m15oNnPVybyngiw/23dKjS\n\
ZVG7rKANEK2mxg1VB+vc/uUc4k49UxJJfCZg1gu1sPFV3GSa+Y/7jsiLktQvCiLP\n\
lncQt1dV+ENmHR5BdIDPWDzKBVbgWnSDnqQ6KrZ7T6AlZ74VMpjGxxkWU6vV2xsW\n\
XCLPA/9P/vtImA8CZN3jxGgtK5GGtDNJ/cMhhuv5tnfwFg4b/VGo2Jr8mhLUqoIb\n\
E6zeGAmZbUpdckDco8D5fiFmqTf5+++pCEpJLJkkzel/32N2w4qzPrcRMCiBURES\n\
PjCLd4Y5rPoU8E4kOHc/4BuHN903tiCsCPloCrWsQZ7UdxfQ5LQiUmVkIEhhdCwg\n\
SW5jIDxzZWN1cml0eUByZWRoYXQuY29tPohVBBMRAgAVBQI36lQ4AwsKAwMVAwID\n\
FgIBAheAAAoJECGRgM3bQqYOsBQAnRVtg7B25Hm11PHcpa8FpeddKiq2AJ9aO8sB\n\
XmLDmPOEFI75mpTrKYHF6rkCDQQ36lRyEAgAokgI2xJ+3bZsk8jRA8ORIX8DH05U\n\
lMH27qFYzLbT6npXwXYIOtVn0K2/iMDj+oEB1Aa2au4OnddYaLWp06v3d+XyS0t+\n\
5ab2ZfIQzdh7wCwxqRkzR+/H5TLYbMG+hvtTdylfqIX0WEfoOXMtWEGSVwyUsnM3\n\
Jy3LOi48rQQSCKtCAUdV20FoIGWhwnb/gHU1BnmES6UdQujFBE6EANqPhp0coYoI\n\
hHJ2oIO8ujQItvvNaU88j/s/izQv5e7MXOgVSjKe/WX3s2JtB/tW7utpy12wh1J+\n\
JsFdbLV/t8CozUTpJgx5mVA3RKlxjTA+On+1IEUWioB+iVfT7Ov/0kcAzwADBQf9\n\
E4SKCWRand8K0XloMYgmipxMhJNnWDMLkokvbMNTUoNpSfRoQJ9EheXDxwMpTPwK\n\
ti/PYrrL2J11P2ed0x7zm8v3gLrY0cue1iSba+8glY+p31ZPOr5ogaJw7ZARgoS8\n\
BwjyRymXQp+8Dete0TELKOL2/itDOPGHW07SsVWOR6cmX4VlRRcWB5KejaNvdrE5\n\
4XFtOd04NMgWI63uqZc4zkRa+kwEZtmbz3tHSdRCCE+Y7YVP6IUf/w6YPQFQriWY\n\
FiA6fD10eB+BlIUqIw80VgjsBKmCwvKkn4jg8kibXgj4/TzQSx77uYokw1EqQ2wk\n\
OZoaEtcubsNMquuLCMWijYhGBBgRAgAGBQI36lRyAAoJECGRgM3bQqYOhyYAnj7h\n\
VDY/FJAGqmtZpwVp9IlitW5tAJ4xQApr/jNFZCTksnI+4O1765F7tA==\n\
";

/* This is the unarmored RPM-PGP-KEY public key. */
const char * redhatPubKeyRSA = "\
mQCNAzEpXjUAAAEEAKG4/V9oUSiDc9wIge6Bmg6erDGCLzmFyioAho8kDIJSrcmi\n\
F9qTdPq+fj726pgW1iSb0Y7syZn9Y2lgQm5HkPODfNi8eWyTFSxbr8ygosLRClTP\n\
xqHVhtInGrfZNLoSpv1LdWOme0yOpOQJnghdOMzKXpgf5g84vaUg6PHLopv5AAUR\n\
tCpSZWQgSGF0IFNvZnR3YXJlLCBJbmMuIDxyZWRoYXRAcmVkaGF0LmNvbT6JAJUD\n\
BRAyA5tUoyDApfg4JKEBAUzSA/9QdcVsu955vVyZDk8uvOXWV0X3voT9B3aYMFvj\n\
UNHUD6F1VFruwQHVKbGJEq1o5MOA6OXKR3vJZStXEMF47TWXJfQaflgl8ywZTH5W\n\
+eMlKau6Nr0labUV3lmsAE4Vsgu8NCkzIrp2wNVbeW2ZAXtrKswV+refLquUhp7l\n\
wMpH9IkAdQMFEDGttkRNdXhbO1TgGQEBAGoC/j6C22PqXIyqZc6fG6J6Jl/T5kFG\n\
xH1pKIzua5WCDDugAgnuOJgywa4pegT4UqwEZiMTAlwT6dmG1CXgKB+5V7lnCjDc\n\
JZLni0iztoe08ig6fJrjNGXljf7KYXzgwBftQokAlQMFEDMQzo2MRVM9rfPulQEB\n\
pLoD/1/MWv3u0Paiu14XRvDrBaJ7BmG2/48bA5vKOzpvvoNRO95YS7ZEtqErXA7Y\n\
DRO8+C8f6PAILMk7kCk4lNMscS/ZRzu5+J8cv4ejsFvxgJBBU3Zgp8AWdWOpvZ0I\n\
wW//HoDUGhOxlEtymljIMFBkj4SysHWhCBUfA9Xy86kouTJQiQCVAwUQMxDOQ50a\n\
feTWLUSJAQFnYQQAkt9nhMTeioREB1DvJt+vsFyOj//o3ThqK5ySEP3dgj62iaQp\n\
JrBmAe5XZPw25C/TXAf+x27H8h2QbKgq49VtsElFexc6wO+uq85fAPDdyE+2XyNE\n\
njGZkY/TP2F/jTB0sAwJO+xFCHmSYkcBjzxK/2LMD+O7rwp2UCUhhl9QhhqJAJUD\n\
BRAx5na6pSDo8cuim/kBARmjA/4lDVnV2h9KiNabp9oE38wmGgu5m5XgUHW8L6du\n\
iQDnwO5IgXN2vDpKGxbgtwv6iYYmGd8IRQ66uJvOsxSv3OR7J7LkCHuI2b/s0AZn\n\
c79DZaJ2ChUCZlbNQBMeEdrFWif9NopY+d5+2tby1onu9XOFMMvomxL3NhctElYR\n\
HC8Xw4kAlQMFEDHmdTtURTdEKY1MpQEBEtEEAMZbp1ZFrjiHkj2aLFC1S8dGRbSH\n\
GUdnLP9qLPFgmWekp9E0o8ZztALGVdqPfPF3N/JJ+AL4IMrfojd7+eZKw36Mdvtg\n\
dPI+Oz4sxHDbDynZ2qspD9Om5yYuxuz/Xq+9nO2IlsAnEYw3ag3cxat0kvxpOPRe\n\
Yy+vFpgfDNizr3MgiQBVAwUQMXNMXCjtrosVMemRAQEDnwH7BsJrnnh91nI54LAK\n\
Gcq3pr8ld0PAtWJmNRGQvUlpEMXUSnu59j2P1ogPNjL3PqKdVxk5Jqgcr8TPQMf3\n\
V4fqXokAlQMFEDFy+8YiEmsRQ3LyzQEB+TwD/03QDslXLg5F3zj4zf0yI6ikT0be\n\
5OhZv2pnkb80qgdHzFRxBOYmSoueRKdQJASd8F9ue4b3bmf/Y7ikiY0DblvxcXB2\n\
sz1Pu8i2Zn9u8SKuxNIoVvM8/STRVkgPfvL5QjAWMHT9Wvg81XcI2yXJzrt/2f2g\n\
mNpWIvVOOT85rVPIiQCVAwUQMVPRlBlzviMjNHElAQG1nwP/fpVX6nKRWJCSFeB7\n\
leZ4lb+y1uMsMVv0n7agjJVw13SXaA267y7VWCBlnhsCemxEugqEIkI4lu/1mgtw\n\
WPWSE0BOIVjj0AA8zp2T0H3ZCCMbiFAFJ1P2Gq2rKr8QrOb/08oH1lEzyz0j/jKh\n\
qiXAxdlB1wojQB6yLbHvTIe3rZGJAHUDBRAxKetfzauiKSJ6LJEBAed/AvsEiGgj\n\
TQzhsZcUuRNrQpV0cDGH9Mpril7P7K7yFIzju8biB+Cu6nEknSOHlMLl8usObVlk\n\
d8Wf14soHC7SjItiGSKtI8JhauzBJPl6fDDeyHGsJKo9f9adKeBMCipCFOuJAJUD\n\
BRAxKeqWRHFTaIK/x+0BAY6eA/4m5X4gs1UwOUIRnljo9a0cVs6ITL554J9vSCYH\n\
Zzd87kFwdf5W1Vd82HIkRzcr6cp33E3IDkRzaQCMVw2me7HePP7+4Ry2q3EeZMbm\n\
NE++VzkxjikzpRb2+F5nGB2UdsElkgbXinswebiuOwOrocLbz6JFdDsJPcT5gVfi\n\
z15FuA==\n\
";
#endif	/* DYING */

struct pgpValTbl_s pgpSigTypeTbl[] = {
    { PGPSIGTYPE_BINARY,	"Binary document signature" },
    { PGPSIGTYPE_TEXT,		"Text document signature" },
    { PGPSIGTYPE_STANDALONE,	"Standalone signature" },
    { PGPSIGTYPE_GENERIC_CERT,	"Generic certification of a User ID and Public Key" },
    { PGPSIGTYPE_PERSONA_CERT,	"Persona certification of a User ID and Public Key" },
    { PGPSIGTYPE_CASUAL_CERT,	"Casual certification of a User ID and Public Key" },
    { PGPSIGTYPE_POSITIVE_CERT,	"Positive certification of a User ID and Public Key" },
    { PGPSIGTYPE_SUBKEY_BINDING,"Subkey Binding Signature" },
    { PGPSIGTYPE_SIGNED_KEY,	"Signature directly on a key" },
    { PGPSIGTYPE_KEY_REVOKE,	"Key revocation signature" },
    { PGPSIGTYPE_SUBKEY_REVOKE,	"Subkey revocation signature" },
    { PGPSIGTYPE_CERT_REVOKE,	"Certification revocation signature" },
    { PGPSIGTYPE_TIMESTAMP,	"Timestamp signature" },
    { -1,			"Unknown signature type" },
};

struct pgpValTbl_s pgpPubkeyTbl[] = {
    { PGPPUBKEYALGO_RSA,	"RSA" },
    { PGPPUBKEYALGO_RSA_ENCRYPT,"RSA(Encrypt-Only)" },
    { PGPPUBKEYALGO_RSA_SIGN,	"RSA(Sign-Only)" },
    { PGPPUBKEYALGO_ELGAMAL_ENCRYPT,"Elgamal(Encrypt-Only)" },
    { PGPPUBKEYALGO_DSA,	"DSA" },
    { PGPPUBKEYALGO_EC,		"Elliptic Curve" },
    { PGPPUBKEYALGO_ECDSA,	"ECDSA" },
    { PGPPUBKEYALGO_ELGAMAL,	"Elgamal" },
    { PGPPUBKEYALGO_DH,		"Diffie-Hellman (X9.42)" },
    { -1,			"Unknown public key algorithm" },
};

struct pgpValTbl_s pgpSymkeyTbl[] = {
    { PGPSYMKEYALGO_PLAINTEXT,	"Plaintext" },
    { PGPSYMKEYALGO_IDEA,	"IDEA" },
    { PGPSYMKEYALGO_TRIPLE_DES,	"3DES" },
    { PGPSYMKEYALGO_CAST5,	"CAST5" },
    { PGPSYMKEYALGO_BLOWFISH,	"BLOWFISH" },
    { PGPSYMKEYALGO_SAFER,	"SAFER" },
    { PGPSYMKEYALGO_DES_SK,	"DES/SK" },
    { PGPSYMKEYALGO_AES_128,	"AES(128-bit key)" },
    { PGPSYMKEYALGO_AES_192,	"AES(192-bit key)" },
    { PGPSYMKEYALGO_AES_256,	"AES(256-bit key)" },
    { PGPSYMKEYALGO_TWOFISH,	"TWOFISH" },
    { -1,			"Unknown symmetric key algorithm" },
};

struct pgpValTbl_s pgpCompressionTbl[] = {
    { PGPCOMPRESSALGO_NONE,	"Uncompressed" },
    { PGPCOMPRESSALGO_ZIP,	"ZIP" },
    { PGPCOMPRESSALGO_ZLIB, 	"ZLIB" },
    { -1,			"Unknown compression algorithm" },
};

struct pgpValTbl_s pgpHashTbl[] = {
    { PGPHASHALGO_MD5,		"MD5" },
    { PGPHASHALGO_SHA1,		"SHA1" },
    { PGPHASHALGO_RIPEMD160,	"RIPEMD160" },
    { PGPHASHALGO_MD2,		"MD2" },
    { PGPHASHALGO_TIGER192,	"TIGER192" },
    { PGPHASHALGO_HAVAL_5_160,	"HAVAL-5-160" },
    { -1,			"Unknown hash algorithm" },
};

/*@-exportlocal -exportheadervar@*/
/*@observer@*/ /*@unchecked@*/
struct pgpValTbl_s pgpKeyServerPrefsTbl[] = {
    { 0x80,			"No-modify" },
    { -1,			"Unknown key server preference" },
};
/*@=exportlocal =exportheadervar@*/

struct pgpValTbl_s pgpSubTypeTbl[] = {
    { PGPSUBTYPE_SIG_CREATE_TIME,"signature creation time" },
    { PGPSUBTYPE_SIG_EXPIRE_TIME,"signature expiration time" },
    { PGPSUBTYPE_EXPORTABLE_CERT,"exportable certification" },
    { PGPSUBTYPE_TRUST_SIG,	"trust signature" },
    { PGPSUBTYPE_REGEX,		"regular expression" },
    { PGPSUBTYPE_REVOCABLE,	"revocable" },
    { PGPSUBTYPE_KEY_EXPIRE_TIME,"key expiration time" },
    { PGPSUBTYPE_BACKWARD_COMPAT,"placeholder for backward compatibility" },
    { PGPSUBTYPE_PREFER_SYMKEY,	"preferred symmetric algorithms" },
    { PGPSUBTYPE_REVOKE_KEY,	"revocation key" },
    { PGPSUBTYPE_ISSUER_KEYID,	"issuer key ID" },
    { PGPSUBTYPE_NOTATION,	"notation data" },
    { PGPSUBTYPE_PREFER_HASH,	"preferred hash algorithms" },
    { PGPSUBTYPE_PREFER_COMPRESS,"preferred compression algorithms" },
    { PGPSUBTYPE_KEYSERVER_PREFERS,"key server preferences" },
    { PGPSUBTYPE_PREFER_KEYSERVER,"preferred key server" },
    { PGPSUBTYPE_PRIMARY_USERID,"primary user id" },
    { PGPSUBTYPE_POLICY_URL,	"policy URL" },
    { PGPSUBTYPE_KEY_FLAGS,	"key flags" },
    { PGPSUBTYPE_SIGNER_USERID,	"signer's user id" },
    { PGPSUBTYPE_REVOKE_REASON,	"reason for revocation" },
    { PGPSUBTYPE_INTERNAL_100,	"internal subpkt type 100" },
    { PGPSUBTYPE_INTERNAL_101,	"internal subpkt type 101" },
    { PGPSUBTYPE_INTERNAL_102,	"internal subpkt type 102" },
    { PGPSUBTYPE_INTERNAL_103,	"internal subpkt type 103" },
    { PGPSUBTYPE_INTERNAL_104,	"internal subpkt type 104" },
    { PGPSUBTYPE_INTERNAL_105,	"internal subpkt type 105" },
    { PGPSUBTYPE_INTERNAL_106,	"internal subpkt type 106" },
    { PGPSUBTYPE_INTERNAL_107,	"internal subpkt type 107" },
    { PGPSUBTYPE_INTERNAL_108,	"internal subpkt type 108" },
    { PGPSUBTYPE_INTERNAL_109,	"internal subpkt type 109" },
    { PGPSUBTYPE_INTERNAL_110,	"internal subpkt type 110" },
    { -1,			"Unknown signature subkey type" },
};

struct pgpValTbl_s pgpTagTbl[] = {
    { PGPTAG_PUBLIC_SESSION_KEY,"Public-Key Encrypted Session Key" },
    { PGPTAG_SIGNATURE,		"Signature" },
    { PGPTAG_SYMMETRIC_SESSION_KEY,"Symmetric-Key Encrypted Session Key" },
    { PGPTAG_ONEPASS_SIGNATURE,	"One-Pass Signature" },
    { PGPTAG_SECRET_KEY,	"Secret Key" },
    { PGPTAG_PUBLIC_KEY,	"Public Key" },
    { PGPTAG_SECRET_SUBKEY,	"Secret Subkey" },
    { PGPTAG_COMPRESSED_DATA,	"Compressed Data" },
    { PGPTAG_SYMMETRIC_DATA,	"Symmetrically Encrypted Data" },
    { PGPTAG_MARKER,		"Marker" },
    { PGPTAG_LITERAL_DATA,	"Literal Data" },
    { PGPTAG_TRUST,		"Trust" },
    { PGPTAG_USER_ID,		"User ID" },
    { PGPTAG_PUBLIC_SUBKEY,	"Public Subkey" },
    { PGPTAG_COMMENT_OLD,	"Comment (from OpenPGP draft)" },
    { PGPTAG_PHOTOID,		"PGP's photo ID" },
    { PGPTAG_ENCRYPTED_MDC,	"Integrity protected encrypted data" },
    { PGPTAG_MDC,		"Manipulaion detection code packet" },
    { PGPTAG_PRIVATE_60,	"Private #60" },
    { PGPTAG_COMMENT,		"Comment" },
    { PGPTAG_PRIVATE_62,	"Private #62" },
    { PGPTAG_CONTROL,		"Control (GPG)" },
    { -1,			"Unknown packet tag" },
};

struct pgpValTbl_s pgpArmorTbl[] = {
    { PGPARMOR_MESSAGE,		"MESSAGE" },
    { PGPARMOR_PUBKEY,		"PUBLIC KEY BLOCK" },
    { PGPARMOR_SIGNATURE,	"SIGNATURE" },
    { PGPARMOR_SIGNED_MESSAGE,	"SIGNED MESSAGE" },
    { PGPARMOR_FILE,		"ARMORED FILE" },
    { PGPARMOR_PRIVKEY,		"PRIVATE KEY BLOCK" },
    { PGPARMOR_SECKEY,		"SECRET KEY BLOCK" },
    { -1,			"Unknown armor block" }
};

struct pgpValTbl_s pgpArmorKeyTbl[] = {
    { PGPARMORKEY_VERSION,	"Version: " },
    { PGPARMORKEY_COMMENT,	"Comment: " },
    { PGPARMORKEY_MESSAGEID,	"MessageID: " },
    { PGPARMORKEY_HASH,		"Hash: " },
    { PGPARMORKEY_CHARSET,	"Charset: " },
    { -1,			"Unknown armor key" }
};

/**
 * Wrapper to free(3), hides const compilation noise, permit NULL, return NULL.
 * @param p		memory to free
 * @return		NULL always
 */
/*@unused@*/ static inline /*@null@*/ void *
_free(/*@only@*/ /*@null@*/ /*@out@*/ const void * p)
	/*@modifies p @*/
{
    if (p != NULL)	free((void *)p);
    return NULL;
}

static void pgpPrtNL(void)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    if (!_print) return;
    fprintf(stderr, "\n");
}

static void pgpPrtInt(const char *pre, int i)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    if (!_print) return;
    if (pre && *pre)
	fprintf(stderr, "%s", pre);
    fprintf(stderr, " %d", i);
}

static void pgpPrtStr(const char *pre, const char *s)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    if (!_print) return;
    if (pre && *pre)
	fprintf(stderr, "%s", pre);
    fprintf(stderr, " %s", s);
}

static void pgpPrtHex(const char *pre, const byte *p, unsigned int plen)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    if (!_print) return;
    if (pre && *pre)
	fprintf(stderr, "%s", pre);
    fprintf(stderr, " %s", pgpHexStr(p, plen));
}

void pgpPrtVal(const char * pre, pgpValTbl vs, byte val)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    if (!_print) return;
    if (pre && *pre)
	fprintf(stderr, "%s", pre);
    fprintf(stderr, "%s(%u)", pgpValStr(vs, val), (unsigned)val);
}

/**
 */
/*@unused@*/ static /*@observer@*/
const char * pgpMpiHex(const byte *p)
        /*@*/
{
    static char prbuf[2048];
    char *t = prbuf;
    t = pgpHexCvt(t, p+2, pgpMpiLen(p)-2);
    return prbuf;
}

static void pgpHexSet(const char * pre, int lbits,
		/*@out@*/ mp32number * mpn, const byte * p)
	/*@globals fileSystem @*/
	/*@modifies *mpn, fileSystem @*/
{
    unsigned int mbits = pgpMpiBits(p);
    unsigned int nbits = (lbits > mbits ? lbits : mbits);
    unsigned int nbytes = ((nbits + 7) >> 3);
    char * t = xmalloc(2*nbytes+1);
    unsigned int ix = 2 * ((nbits - mbits) >> 3);

if (_debug)
fprintf(stderr, "*** mbits %u nbits %u nbytes %u t %p[%d] ix %u\n", mbits, nbits, nbytes, t, (2*nbytes+1), ix);
    if (ix > 0) memset(t, (int)'0', ix);
    strcpy(t+ix, pgpMpiHex(p));
if (_debug)
fprintf(stderr, "*** %s %s\n", pre, t);
    mp32nsethex(mpn, t);
    t = _free(t);
if (_debug && _print)
fprintf(stderr, "\t %s ", pre), mp32println(stderr, mpn->size, mpn->data);
}

int pgpPrtSubType(const byte *h, unsigned int hlen)
{
    const byte *p = h;
    unsigned plen;
    int i;

    while (hlen > 0) {
	i = pgpLen(p, &plen);
	p += i;
	hlen -= i;

	pgpPrtVal("    ", pgpSubTypeTbl, p[0]);
	switch (*p) {
	case PGPSUBTYPE_PREFER_SYMKEY:	/* preferred symmetric algorithms */
	    for (i = 1; i < plen; i++)
		pgpPrtVal(" ", pgpSymkeyTbl, p[i]);
	    /*@switchbreak@*/ break;
	case PGPSUBTYPE_PREFER_HASH:	/* preferred hash algorithms */
	    for (i = 1; i < plen; i++)
		pgpPrtVal(" ", pgpHashTbl, p[i]);
	    /*@switchbreak@*/ break;
	case PGPSUBTYPE_PREFER_COMPRESS:/* preferred compression algorithms */
	    for (i = 1; i < plen; i++)
		pgpPrtVal(" ", pgpCompressionTbl, p[i]);
	    /*@switchbreak@*/ break;
	case PGPSUBTYPE_KEYSERVER_PREFERS:/* key server preferences */
	    for (i = 1; i < plen; i++)
		pgpPrtVal(" ", pgpKeyServerPrefsTbl, p[i]);
	    /*@switchbreak@*/ break;
	case PGPSUBTYPE_SIG_CREATE_TIME:
/*@-mods -mayaliasunique @*/
	    if (_digp && _digp->tag == PGPTAG_PUBLIC_KEY) {
		memcpy(_digp->time, p+1, sizeof(_digp->time));
	    }
/*@=mods =mayaliasunique @*/
	    /*@fallthrough@*/
	case PGPSUBTYPE_SIG_EXPIRE_TIME:
	case PGPSUBTYPE_KEY_EXPIRE_TIME:
	    if ((plen - 1) == 4) {
		time_t t = pgpGrab(p+1, plen-1);
		if (_print)
		   fprintf(stderr, " %-24.24s(0x%08x)", ctime(&t), (unsigned)t);
	    } else
		pgpPrtHex("", p+1, plen-1);
	    /*@switchbreak@*/ break;

	case PGPSUBTYPE_ISSUER_KEYID:	/* issuer key ID */
/*@-mods -mayaliasunique @*/
	    if (_digp && _digp->tag == PGPTAG_PUBLIC_KEY) {
		memcpy(_digp->signid, p+1, sizeof(_digp->signid));
	    }
/*@=mods =mayaliasunique @*/
	    /*@fallthrough@*/
	case PGPSUBTYPE_EXPORTABLE_CERT:
	case PGPSUBTYPE_TRUST_SIG:
	case PGPSUBTYPE_REGEX:
	case PGPSUBTYPE_REVOCABLE:
	case PGPSUBTYPE_BACKWARD_COMPAT:
	case PGPSUBTYPE_REVOKE_KEY:
	case PGPSUBTYPE_NOTATION:
	case PGPSUBTYPE_PREFER_KEYSERVER:
	case PGPSUBTYPE_PRIMARY_USERID:
	case PGPSUBTYPE_POLICY_URL:
	case PGPSUBTYPE_KEY_FLAGS:
	case PGPSUBTYPE_SIGNER_USERID:
	case PGPSUBTYPE_REVOKE_REASON:
	case PGPSUBTYPE_INTERNAL_100:
	case PGPSUBTYPE_INTERNAL_101:
	case PGPSUBTYPE_INTERNAL_102:
	case PGPSUBTYPE_INTERNAL_103:
	case PGPSUBTYPE_INTERNAL_104:
	case PGPSUBTYPE_INTERNAL_105:
	case PGPSUBTYPE_INTERNAL_106:
	case PGPSUBTYPE_INTERNAL_107:
	case PGPSUBTYPE_INTERNAL_108:
	case PGPSUBTYPE_INTERNAL_109:
	case PGPSUBTYPE_INTERNAL_110:
	default:
	    pgpPrtHex("", p+1, plen-1);
	    /*@switchbreak@*/ break;
	}
	pgpPrtNL();
	p += plen;
	hlen -= plen;
    }
    return 0;
}

/*@-varuse =readonlytrans @*/
/*@observer@*/ /*@unchecked@*/
static const char * pgpSigRSA[] = {
    " m**d =",
    NULL,
};

/*@observer@*/ /*@unchecked@*/
static const char * pgpSigDSA[] = {
    "    r =",
    "    s =",
    NULL,
};
/*@=varuse =readonlytrans @*/

static int pgpPrtSigParams(/*@unused@*/ pgpTag tag, byte pubkey_algo, byte sigtype,
		const byte *p, const byte *h, unsigned int hlen)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    int i;

    for (i = 0; p < &h[hlen]; i++, p += pgpMpiLen(p)) {
	if (pubkey_algo == PGPPUBKEYALGO_RSA) {
	    if (i >= 1) break;
	    /*@-mods@*/
	    if (_dig &&
	(sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT))
	    {
		switch (i) {
		case 0:		/* m**d */
		    mp32nsethex(&_dig->c, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t  m**d = "),  mp32println(stderr, _dig->c.size, _dig->c.data);
		    /*@switchbreak@*/ break;
		default:
		    /*@switchbreak@*/ break;
		}
	    }
	    /*@=mods@*/
	    pgpPrtStr("", pgpSigRSA[i]);
	} else if (pubkey_algo == PGPPUBKEYALGO_DSA) {
	    if (i >= 2) break;
	    /*@-mods@*/
	    if (_dig &&
	(sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT))
	    {
		switch (i) {
		case 0:		/* r */
		    pgpHexSet(pgpSigDSA[i], 160, &_dig->r, p);
		    /*@switchbreak@*/ break;
		case 1:		/* s */
		    pgpHexSet(pgpSigDSA[i], 160, &_dig->s, p);
		    /*@switchbreak@*/ break;
		default:
		    /*@switchbreak@*/ break;
		}
	    }
	    /*@=mods@*/
	    pgpPrtStr("", pgpSigDSA[i]);
	} else {
	    if (_print)
		fprintf(stderr, "%7d", i);
	}
	pgpPrtStr("", pgpMpiStr(p));
	pgpPrtNL();
    }

    return 0;
}

int pgpPrtSig(pgpTag tag, const byte *h, unsigned int hlen)
{
    byte version = h[0];
    byte * p;
    unsigned plen;
    int rc;

    switch (version) {
    case 3:
    {   pgpPktSigV3 v = (pgpPktSigV3)h;
	time_t t;

	if (v->hashlen != 5) {
	    fprintf(stderr, " hashlen(%u) != 5\n", (unsigned)v->hashlen);
	    return 1;
	}

	pgpPrtVal("V3 ", pgpTagTbl, tag);
	pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
	pgpPrtVal(" ", pgpHashTbl, v->hash_algo);
	pgpPrtVal(" ", pgpSigTypeTbl, v->sigtype);
	pgpPrtNL();
	t = pgpGrab(v->time, sizeof(v->time));
	if (_print)
	    fprintf(stderr, " %-24.24s(0x%08x)", ctime(&t), (unsigned)t);
	pgpPrtNL();
	pgpPrtHex(" signer keyid", v->signid, sizeof(v->signid));
	plen = pgpGrab(v->signhash16, sizeof(v->signhash16));
	pgpPrtHex(" signhash16", v->signhash16, sizeof(v->signhash16));
	pgpPrtNL();

/*@-mods@*/
	if (_digp && _digp->pubkey_algo == 0) {
	    _digp->version = v->version;
	    _digp->hashlen = v->hashlen;
	    _digp->sigtype = v->sigtype;
	    _digp->hash = memcpy(xmalloc(v->hashlen), &v->sigtype, v->hashlen);
	    memcpy(_digp->time, v->time, sizeof(_digp->time));
	    memcpy(_digp->signid, v->signid, sizeof(_digp->signid));
	    _digp->pubkey_algo = v->pubkey_algo;
	    _digp->hash_algo = v->hash_algo;
	    memcpy(_digp->signhash16, v->signhash16, sizeof(_digp->signhash16));
	}
/*@=mods@*/

	p = ((byte *)v) + sizeof(*v);
	rc = pgpPrtSigParams(tag, v->pubkey_algo, v->sigtype, p, h, hlen);
    }	break;
    case 4:
    {   pgpPktSigV4 v = (pgpPktSigV4)h;

	pgpPrtVal("V4 ", pgpTagTbl, tag);
	pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
	pgpPrtVal(" ", pgpHashTbl, v->hash_algo);
	pgpPrtVal(" ", pgpSigTypeTbl, v->sigtype);
	pgpPrtNL();

	p = &v->hashlen[0];
	plen = pgpGrab(v->hashlen, sizeof(v->hashlen));
	p += sizeof(v->hashlen);

if (_debug && _print)
fprintf(stderr, "   hash[%u] -- %s\n", plen, pgpHexStr(p, plen));
/*@-mods@*/
	if (_digp && _digp->pubkey_algo == 0) {
	    _digp->hashlen = sizeof(*v) + plen;
	    _digp->hash = memcpy(xmalloc(_digp->hashlen), v, _digp->hashlen);
	}
/*@=mods@*/
	(void) pgpPrtSubType(p, plen);
	p += plen;

	plen = pgpGrab(p,2);
	p += 2;

if (_debug && _print)
fprintf(stderr, " unhash[%u] -- %s\n", plen, pgpHexStr(p, plen));
	(void) pgpPrtSubType(p, plen);
	p += plen;

	plen = pgpGrab(p,2);
	pgpPrtHex(" signhash16", p, 2);
	pgpPrtNL();

/*@-mods@*/
	if (_digp && _digp->pubkey_algo == 0) {
	    _digp->version = v->version;
	    _digp->sigtype = v->sigtype;
	    _digp->pubkey_algo = v->pubkey_algo;
	    _digp->hash_algo = v->hash_algo;
	    memcpy(_digp->signhash16, p, sizeof(_digp->signhash16));
	}
/*@=mods@*/

	p += 2;

	rc = pgpPrtSigParams(tag, v->pubkey_algo, v->sigtype, p, h, hlen);
    }	break;
    default:
	rc = 1;
	break;
    }
    return rc;
}

/*@-varuse =readonlytrans @*/
/*@observer@*/ /*@unchecked@*/
static const char * pgpPublicRSA[] = {
    "    n =",
    "    e =",
    NULL,
};

/*@observer@*/ /*@unchecked@*/
static const char * pgpSecretRSA[] = {
    "    d =",
    "    p =",
    "    q =",
    "    u =",
    NULL,
};

/*@observer@*/ /*@unchecked@*/
static const char * pgpPublicDSA[] = {
    "    p =",
    "    q =",
    "    g =",
    "    y =",
    NULL,
};

/*@observer@*/ /*@unchecked@*/
static const char * pgpSecretDSA[] = {
    "    x =",
    NULL,
};

/*@observer@*/ /*@unchecked@*/
static const char * pgpPublicELGAMAL[] = {
    "    p =",
    "    g =",
    "    y =",
    NULL,
};

/*@observer@*/ /*@unchecked@*/
static const char * pgpSecretELGAMAL[] = {
    "    x =",
    NULL,
};
/*@=varuse =readonlytrans @*/

static const byte * pgpPrtPubkeyParams(byte pubkey_algo,
		/*@returned@*/ const byte *p, const byte *h, unsigned int hlen)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    int i;

    for (i = 0; p < &h[hlen]; i++, p += pgpMpiLen(p)) {
	if (pubkey_algo == PGPPUBKEYALGO_RSA) {
	    if (i >= 2) break;
	    /*@-mods@*/
	    if (_dig) {
		switch (i) {
		case 0:		/* n */
		    mp32bsethex(&_dig->rsa_pk.n, pgpMpiHex(p));
		    /* Get the keyid */
		    if (_digp) {
			uint32* np = _dig->rsa_pk.n.modl;
			uint32  nsize = _dig->rsa_pk.n.size;
			uint32 keyid[2];
			#if WORDS_BIGENDIAN
			keyid[0] = np[nsize-2];
			keyid[1] = np[nsize-1];
			#else
			keyid[0] = swapu32(np[nsize-2]);
			keyid[1] = swapu32(np[nsize-1]);
			#endif
			memcpy(_digp->signid, keyid, sizeof(_digp->signid));
		    }
if (_debug && _print)
fprintf(stderr, "\t     n = "),  mp32println(stderr, _dig->rsa_pk.n.size, _dig->rsa_pk.n.modl);
		    /*@switchbreak@*/ break;
		case 1:		/* e */
		    mp32nsethex(&_dig->rsa_pk.e, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     e = "),  mp32println(stderr, _dig->rsa_pk.e.size, _dig->rsa_pk.e.data);
		    /*@switchbreak@*/ break;
		default:
		    /*@switchbreak@*/ break;
		}
	    }
	    /*@=mods@*/
	    pgpPrtStr("", pgpPublicRSA[i]);
	} else if (pubkey_algo == PGPPUBKEYALGO_DSA) {
	    if (i >= 4) break;
	    /*@-mods@*/
	    if (_dig) {
		switch (i) {
		case 0:		/* p */
		    mp32bsethex(&_dig->p, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     p = "),  mp32println(stderr, _dig->p.size, _dig->p.modl);
		    /*@switchbreak@*/ break;
		case 1:		/* q */
		    mp32bsethex(&_dig->q, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     q = "),  mp32println(stderr, _dig->q.size, _dig->q.modl);
		    /*@switchbreak@*/ break;
		case 2:		/* g */
		    mp32nsethex(&_dig->g, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     g = "),  mp32println(stderr, _dig->g.size, _dig->g.data);
		    /*@switchbreak@*/ break;
		case 3:		/* y */
		    mp32nsethex(&_dig->y, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     y = "),  mp32println(stderr, _dig->y.size, _dig->y.data);
		    /*@switchbreak@*/ break;
		default:
		    /*@switchbreak@*/ break;
		}
	    }
	    /*@=mods@*/
	    pgpPrtStr("", pgpPublicDSA[i]);
	} else if (pubkey_algo == PGPPUBKEYALGO_ELGAMAL_ENCRYPT) {
	    if (i >= 3) break;
	    pgpPrtStr("", pgpPublicELGAMAL[i]);
	} else {
	    if (_print)
		fprintf(stderr, "%7d", i);
	}
    /*@=mods@*/
	pgpPrtStr("", pgpMpiStr(p));
	pgpPrtNL();
    }

    return p;
}

static const byte * pgpPrtSeckeyParams(/*@unused@*/ byte pubkey_algo,
		/*@returned@*/ const byte *p, const byte *h, unsigned int hlen)
	/*@globals fileSystem @*/
	/*@modifies fileSystem @*/
{
    int i;

    switch (*p) {
    case 0:
	pgpPrtVal(" ", pgpSymkeyTbl, *p);
	break;
    case 255:
	p++;
	pgpPrtVal(" ", pgpSymkeyTbl, *p);
	switch (p[1]) {
	case 0x00:
	    pgpPrtVal(" simple ", pgpHashTbl, p[2]);
	    p += 2;
	    /*@innerbreak@*/ break;
	case 0x01:
	    pgpPrtVal(" salted ", pgpHashTbl, p[2]);
	    pgpPrtHex("", p+3, 8);
	    p += 10;
	    /*@innerbreak@*/ break;
	case 0x03:
	    pgpPrtVal(" iterated/salted ", pgpHashTbl, p[2]);
	    /*@-shiftnegative@*/ /* FIX: unsigned cast */
	    i = (16 + (p[11] & 0xf)) << ((p[11] >> 4) + 6);
	    /*@=shiftnegative@*/
	    pgpPrtHex("", p+3, 8);
	    pgpPrtInt(" iter", i);
	    p += 11;
	    /*@innerbreak@*/ break;
	}
	break;
    default:
	pgpPrtVal(" ", pgpSymkeyTbl, *p);
	pgpPrtHex(" IV", p+1, 8);
	p += 8;
	break;
    }
    pgpPrtNL();

    p++;

#ifdef	NOTYET	/* XXX encrypted MPI's need to be handled. */
    for (i = 0; p < &h[hlen]; i++, p += pgpMpiLen(p)) {
	if (pubkey_algo == PGPPUBKEYALGO_RSA) {
	    if (pgpSecretRSA[i] == NULL) break;
	    pgpPrtStr("", pgpSecretRSA[i]);
	} else if (pubkey_algo == PGPPUBKEYALGO_DSA) {
	    if (pgpSecretDSA[i] == NULL) break;
	    pgpPrtStr("", pgpSecretDSA[i]);
	} else if (pubkey_algo == PGPPUBKEYALGO_ELGAMAL_ENCRYPT) {
	    if (pgpSecretELGAMAL[i] == NULL) break;
	    pgpPrtStr("", pgpSecretELGAMAL[i]);
	} else {
	    if (_print)
		fprintf(stderr, "%7d", i);
	}
	pgpPrtStr("", pgpMpiStr(p));
	pgpPrtNL();
    }
#else
    pgpPrtHex(" secret", p, (hlen - (p - h) - 2));
    pgpPrtNL();
    p += (hlen - (p - h) - 2);
#endif
    pgpPrtHex(" checksum", p, 2);
    pgpPrtNL();

    return p;
}

int pgpPrtKey(pgpTag tag, const byte *h, unsigned int hlen)
{
    byte version = *h;
    const byte * p;
    unsigned plen;
    time_t t;
    int rc;

    switch (version) {
    case 3:
    {   pgpPktKeyV3 v = (pgpPktKeyV3)h;
	pgpPrtVal("V3 ", pgpTagTbl, tag);
	pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
	t = pgpGrab(v->time, sizeof(v->time));
	if (_print)
	    fprintf(stderr, " %-24.24s(0x%08x)", ctime(&t), (unsigned)t);
	plen = pgpGrab(v->valid, sizeof(v->valid));
	if (plen != 0)
	    fprintf(stderr, " valid %u days", plen);
	pgpPrtNL();

/*@-mods@*/
	if (_digp && _digp->tag == tag) {
	    _digp->version = v->version;
	    memcpy(_digp->time, v->time, sizeof(_digp->time));
	    _digp->pubkey_algo = v->pubkey_algo;
	}
/*@=mods@*/

	p = ((byte *)v) + sizeof(*v);
	p = pgpPrtPubkeyParams(v->pubkey_algo, p, h, hlen);
	rc = 0;
    }	break;
    case 4:
    {   pgpPktKeyV4 v = (pgpPktKeyV4)h;
	pgpPrtVal("V4 ", pgpTagTbl, tag);
	pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
	t = pgpGrab(v->time, sizeof(v->time));
	if (_print)
	    fprintf(stderr, " %-24.24s(0x%08x)", ctime(&t), (unsigned)t);
	pgpPrtNL();

/*@-mods@*/
	if (_digp && _digp->tag == tag) {
	    _digp->version = v->version;
	    memcpy(_digp->time, v->time, sizeof(_digp->time));
	    _digp->pubkey_algo = v->pubkey_algo;
	}
/*@=mods@*/

	p = ((byte *)v) + sizeof(*v);
	p = pgpPrtPubkeyParams(v->pubkey_algo, p, h, hlen);
	if (!(tag == PGPTAG_PUBLIC_KEY || tag == PGPTAG_PUBLIC_SUBKEY))
	    p = pgpPrtSeckeyParams(v->pubkey_algo, p, h, hlen);
	rc = 0;
    }	break;
    default:
	rc = 1;
	break;
    }
    return rc;
}

int pgpPrtUserID(pgpTag tag, const byte *h, unsigned int hlen)
{
    pgpPrtVal("", pgpTagTbl, tag);
    if (_print)
	fprintf(stderr, " \"%.*s\"", (int)hlen, (const char *)h);
    pgpPrtNL();
/*@-mods@*/
    if (_digp) {
	char * t;
	_digp->userid = t = memcpy(xmalloc(hlen+1), h, hlen);
	t[hlen] = '\0';
    }
/*@=mods@*/
    return 0;
}

int pgpPrtComment(pgpTag tag, const byte *h, unsigned int hlen)
{
    int i = hlen;

    pgpPrtVal("", pgpTagTbl, tag);
    if (_print)
	fprintf(stderr, " ");
    while (i > 0) {
	int j;
	if (*h >= ' ' && *h <= 'z') {
	    if (_print)
		fprintf(stderr, "%s", (const char *)h);
	    j = strlen(h);
	    while (h[j] == '\0')
		j++;
	} else {
	    pgpPrtHex("", h, i);
	    j = i;
	}
	i -= j;
	h += j;
    }
    pgpPrtNL();
    return 0;
}

int pgpPrtPkt(const byte *pkt)
{
    unsigned int val = *pkt;
    unsigned int pktlen;
    pgpTag tag;
    unsigned int plen;
    const byte *h;
    unsigned int hlen = 0;
    int rc = 0;

    /* XXX can't deal with these. */
    if (!(val & 0x80))
	return -1;

    if (val & 0x40) {
	tag = (val & 0x3f);
	plen = pgpLen(pkt+1, &hlen);
    } else {
	tag = (val >> 2) & 0xf;
	plen = (1 << (val & 0x3));
	hlen = pgpGrab(pkt+1, plen);
    }

    pktlen = 1 + plen + hlen;
    h = pkt + 1 + plen;
    switch (tag) {
    case PGPTAG_SIGNATURE:
	rc = pgpPrtSig(tag, h, hlen);
	break;
    case PGPTAG_PUBLIC_KEY:
    case PGPTAG_PUBLIC_SUBKEY:
	rc = pgpPrtKey(tag, h, hlen);
	break;
    case PGPTAG_SECRET_KEY:
    case PGPTAG_SECRET_SUBKEY:
	rc = pgpPrtKey(tag, h, hlen);
	break;
    case PGPTAG_USER_ID:
	rc = pgpPrtUserID(tag, h, hlen);
	break;
    case PGPTAG_COMMENT:
    case PGPTAG_COMMENT_OLD:
	rc = pgpPrtComment(tag, h, hlen);
	break;

    case PGPTAG_RESERVED:
    case PGPTAG_PUBLIC_SESSION_KEY:
    case PGPTAG_SYMMETRIC_SESSION_KEY:
    case PGPTAG_COMPRESSED_DATA:
    case PGPTAG_SYMMETRIC_DATA:
    case PGPTAG_MARKER:
    case PGPTAG_LITERAL_DATA:
    case PGPTAG_TRUST:
    case PGPTAG_PHOTOID:
    case PGPTAG_ENCRYPTED_MDC:
    case PGPTAG_MDC:
    case PGPTAG_PRIVATE_60:
    case PGPTAG_PRIVATE_62:
    case PGPTAG_CONTROL:
    default:
	pgpPrtVal("", pgpTagTbl, tag);
	pgpPrtHex("", h, hlen);
	pgpPrtNL();
	break;
    }

    return (rc ? -1 : pktlen);
}

struct pgpDig_s * pgpNewDig(void)
{
    struct pgpDig_s * dig = xcalloc(1, sizeof(*dig));
    return dig;
}

struct pgpDig_s * pgpFreeDig(/*@only@*/ /*@null@*/ struct pgpDig_s * dig)
	/*@modifies dig @*/
{
    if (dig != NULL) {
	int i;
	dig->signature.userid = _free(dig->signature.userid);
	dig->pubkey.userid = _free(dig->pubkey.userid);
	dig->signature.hash = _free(dig->signature.hash);
	dig->pubkey.hash = _free(dig->pubkey.hash);
	/*@-unqualifiedtrans@*/ /* FIX: double indirection */
	for (i = 0; i < 4; i++) {
	    dig->signature.params[i] = _free(dig->signature.params[i]);
	    dig->pubkey.params[i] = _free(dig->pubkey.params[i]);
	}
	/*@=unqualifiedtrans@*/

	/*@-branchstate@*/
	if (dig->md5ctx != NULL)
	    (void) rpmDigestFinal(dig->md5ctx, NULL, NULL, 0);
	/*@=branchstate@*/
	dig->md5ctx = NULL;
	dig->md5 = _free(dig->md5);

	/*@-branchstate@*/
	if (dig->hdrsha1ctx != NULL)
	    (void) rpmDigestFinal(dig->hdrsha1ctx, NULL, NULL, 0);
	/*@=branchstate@*/
	dig->hdrsha1ctx = NULL;

	/*@-branchstate@*/
	if (dig->sha1ctx != NULL)
	    (void) rpmDigestFinal(dig->sha1ctx, NULL, NULL, 0);
	/*@=branchstate@*/
	dig->sha1ctx = NULL;
	dig->sha1 = _free(dig->sha1);

	mp32nfree(&dig->hm);
	mp32nfree(&dig->r);
	mp32nfree(&dig->s);

	(void) rsapkFree(&dig->rsa_pk);
	mp32nfree(&dig->m);
	mp32nfree(&dig->c);
	mp32nfree(&dig->rsahm);
	dig = _free(dig);
    }
    return dig;
}

int pgpPrtPkts(const byte * pkts, unsigned int plen,
		struct pgpDig_s * dig, int printing)
{
    unsigned int val = *pkts;
    const byte *p;
    int len;

    /*@-mods@*/
    _print = printing;
    _dig = dig;
    if (dig != NULL && (val & 0x80)) {
	pgpTag tag = (val & 0x40) ? (val & 0x3f) : ((val >> 2) & 0xf);
	_digp = (tag == PGPTAG_SIGNATURE) ? &_dig->signature : &_dig->pubkey;
	_digp->tag = tag;
    } else
	_digp = NULL;
    /*@=mods@*/

    for (p = pkts; p < (pkts + plen); p += len) {
	len = pgpPrtPkt(p);
        if (len <= 0)
	    return len;
    }
    return 0;
}

pgpArmor pgpReadPkts(const char * fn, const byte ** pkt, size_t * pktlen)
{
    const byte * b = NULL;
    ssize_t blen;
    const char * enc = NULL;
    const char * crcenc = NULL;
    byte * dec;
    byte * crcdec;
    size_t declen;
    size_t crclen;
    uint32 crcpkt, crc;
    const char * armortype = NULL;
    char * t, * te;
    int pstate = 0;
    pgpArmor ec = PGPARMOR_ERROR;	/* XXX assume failure */
    int rc;

    rc = rpmioSlurp(fn, &b, &blen);
    if (rc || b == NULL || blen <= 0) {
	goto exit;
    }

    if (pgpIsPkt(b)) {
#ifdef NOTYET	/* XXX ASCII Pubkeys only, please. */
	ec = 0;	/* XXX fish out pkt type. */
#endif
	goto exit;
    }

#define	TOKEQ(_s, _tok)	(!strncmp((_s), (_tok), sizeof(_tok)-1))

    for (t = (char *)b; t && *t; t = te) {
	if ((te = strchr(t, '\n')) == NULL)
	    te = t + strlen(t);
	else
	    te++;

	switch (pstate) {
	case 0:
	    armortype = NULL;
	    if (!TOKEQ(t, "-----BEGIN PGP "))
		continue;
	    t += sizeof("-----BEGIN PGP ")-1;

	    rc = pgpValTok(pgpArmorTbl, t, te);
	    if (rc < 0)
		goto exit;
	    if (rc != PGPARMOR_PUBKEY)	/* XXX ASCII Pubkeys only, please. */
		continue;
	    armortype = t;

	    t = te - (sizeof("-----\n")-1);
	    if (!TOKEQ(t, "-----\n"))
		continue;
	    *t = '\0';
	    pstate++;
	    /*@switchbreak@*/ break;
	case 1:
	    enc = NULL;
	    rc = pgpValTok(pgpArmorKeyTbl, t, te);
	    if (rc >= 0)
		continue;
	    if (*t != '\n') {
		pstate = 0;
		continue;
	    }
	    enc = te;		/* Start of encoded packets */
	    pstate++;
	    /*@switchbreak@*/ break;
	case 2:
	    crcenc = NULL;
	    if (*t != '=')
		continue;
	    *t++ = '\0';	/* Terminate encoded packets */
	    crcenc = t;		/* Start of encoded crc */
	    pstate++;
	    /*@switchbreak@*/ break;
	case 3:
	    pstate = 0;
	    if (!TOKEQ(t, "-----END PGP "))
		goto exit;
	    *t = '\0';		/* Terminate encoded crc */
	    t += sizeof("-----END PGP ")-1;

	    if (armortype == NULL) /* XXX can't happen */
		continue;
	    rc = strncmp(t, armortype, strlen(armortype));
	    if (rc)
		continue;

	    t = te - (sizeof("-----\n")-1);
	    if (!TOKEQ(t, "-----\n"))
		goto exit;

	    if (b64decode(crcenc, (void **)&crcdec, &crclen) != 0)
		continue;
	    crcpkt = pgpGrab(crcdec, crclen);
	    crcdec = _free(crcdec);
	    if (b64decode(enc, (void **)&dec, &declen) != 0)
		goto exit;
	    crc = pgpCRC(dec, declen);
	    if (crcpkt != crc)
		goto exit;
	    b = _free(b);
	    b = dec;
	    blen = declen;
	    ec = PGPARMOR_PUBKEY;	/* XXX ASCII Pubkeys only, please. */
	    goto exit;
	    /*@notreached@*/ /*@switchbreak@*/ break;
	}
    }
    ec = PGPARMOR_NONE;

exit:
    if (ec > PGPARMOR_NONE && pkt)
	*pkt = b;
    else if (b != NULL)
	b = _free(b);
    if (pktlen)
	*pktlen = blen;
    return ec;
}