rpmio/rpmpgp.c

Go to the documentation of this file.

/*@-boundsread@*/
#include "system.h"
#include "rpmio_internal.h"
#include "debug.h"

/*@access pgpDig @*/
/*@access pgpDigParams @*/

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

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

/*@unchecked@*/ /*@null@*/
static pgpDig _dig = NULL;

/*@unchecked@*/ /*@null@*/
static pgpDigParams _digp = NULL;

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(256-bit key)" },
    { PGPSYMKEYALGO_NOENCRYPT,  "no encryption" },
    { -1,                       "Unknown symmetric key algorithm" },
};

struct pgpValTbl_s pgpCompressionTbl[] = {
    { PGPCOMPRESSALGO_NONE,     "Uncompressed" },
    { PGPCOMPRESSALGO_ZIP,      "ZIP" },
    { PGPCOMPRESSALGO_ZLIB,     "ZLIB" },
    { PGPCOMPRESSALGO_BZIP2,    "BZIP2" },
    { -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" },
    { PGPHASHALGO_SHA256,       "SHA256" },
    { PGPHASHALGO_SHA384,       "SHA384" },
    { PGPHASHALGO_SHA512,       "SHA512" },
    { -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_ARR,           "additional recipient request" },
    { 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_FEATURES,      "features" },
    { PGPSUBTYPE_EMBEDDED_SIG,  "embedded signature" },

    { 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" }
};

/*@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;
}

/*@-boundswrite@*/
static int pgpHexSet(const char * pre, int lbits,
                /*@out@*/ mpnumber * mpn, const byte * p, const byte * pend)
        /*@globals fileSystem @*/
        /*@modifies mpn, fileSystem @*/
{
    unsigned int mbits = pgpMpiBits(p);
    unsigned int nbits;
    unsigned int nbytes;
    char * t;
    unsigned int ix;

    if ((p + ((mbits+7) >> 3)) > pend)
        return 1;

    nbits = (lbits > mbits ? lbits : mbits);
    nbytes = ((nbits + 7) >> 3);
    t = xmalloc(2*nbytes+1);
    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);
    (void) mpnsethex(mpn, t);
    t = _free(t);
if (_debug && _print)
fprintf(stderr, "\t %s ", pre), mpfprintln(stderr, mpn->size, mpn->data);
    return 0;
}
/*@=boundswrite@*/

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

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

        pgpPrtVal("    ", pgpSubTypeTbl, (p[0]&(~PGPSUBTYPE_CRITICAL)));
        if (p[0] & PGPSUBTYPE_CRITICAL)
            if (_print)
                fprintf(stderr, " *CRITICAL*");
        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->saved & PGPDIG_SAVED_TIME) &&
                (sigtype == PGPSIGTYPE_POSITIVE_CERT || sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT || sigtype == PGPSIGTYPE_STANDALONE))
            {
                _digp->saved |= PGPDIG_SAVED_TIME;
                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->saved & PGPDIG_SAVED_ID) &&
                (sigtype == PGPSIGTYPE_POSITIVE_CERT || sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT || sigtype == PGPSIGTYPE_STANDALONE))
            {
                _digp->saved |= PGPDIG_SAVED_ID;
                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_ARR:
        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_FEATURES:
        case PGPSUBTYPE_EMBEDDED_SIG:
        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 @*/
{
    const byte * pend = h + hlen;
    int i;

    for (i = 0; p < pend; i++, p += pgpMpiLen(p)) {
        if (pubkey_algo == PGPPUBKEYALGO_RSA) {
            if (i >= 1) break;
            if (_dig &&
        (sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT))
            {
                switch (i) {
                case 0:         /* m**d */
                    (void) mpnsethex(&_dig->c, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t  m**d = "),  mpfprintln(stderr, _dig->c.size, _dig->c.data);
                    /*@switchbreak@*/ break;
                default:
                    /*@switchbreak@*/ break;
                }
            }
            pgpPrtStr("", pgpSigRSA[i]);
        } else if (pubkey_algo == PGPPUBKEYALGO_DSA) {
            if (i >= 2) break;
            if (_dig &&
        (sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT))
            {
                int xx;
                xx = 0;
                switch (i) {
                case 0:         /* r */
                    xx = pgpHexSet(pgpSigDSA[i], 160, &_dig->r, p, pend);
                    /*@switchbreak@*/ break;
                case 1:         /* s */
                    xx = pgpHexSet(pgpSigDSA[i], 160, &_dig->s, p, pend);
                    /*@switchbreak@*/ break;
                default:
                    xx = 1;
                    /*@switchbreak@*/ break;
                }
                if (xx) return xx;
            }
            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)
        /*@globals _digp @*/
        /*@modifies *_digp @*/
{
    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)
            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();

        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));
        }

        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 ((p + plen) > (h + hlen))
            return 1;

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

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

        if ((p + plen) > (h + hlen))
            return 1;

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

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

        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));
        }

        p += 2;
        if (p > (h + hlen))
            return 1;

        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, internalState @*/
        /*@modifies fileSystem, internalState @*/
{
    int i;

    for (i = 0; p < &h[hlen]; i++, p += pgpMpiLen(p)) {
        if (pubkey_algo == PGPPUBKEYALGO_RSA) {
            if (i >= 2) break;
            if (_dig) {
                switch (i) {
                case 0:         /* n */
                    (void) mpbsethex(&_dig->rsa_pk.n, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     n = "),  mpfprintln(stderr, _dig->rsa_pk.n.size, _dig->rsa_pk.n.modl);
                    /*@switchbreak@*/ break;
                case 1:         /* e */
                    (void) mpnsethex(&_dig->rsa_pk.e, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     e = "),  mpfprintln(stderr, _dig->rsa_pk.e.size, _dig->rsa_pk.e.data);
                    /*@switchbreak@*/ break;
                default:
                    /*@switchbreak@*/ break;
                }
            }
            pgpPrtStr("", pgpPublicRSA[i]);
        } else if (pubkey_algo == PGPPUBKEYALGO_DSA) {
            if (i >= 4) break;
            if (_dig) {
                switch (i) {
                case 0:         /* p */
                    (void) mpbsethex(&_dig->p, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     p = "),  mpfprintln(stderr, _dig->p.size, _dig->p.modl);
                    /*@switchbreak@*/ break;
                case 1:         /* q */
                    (void) mpbsethex(&_dig->q, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     q = "),  mpfprintln(stderr, _dig->q.size, _dig->q.modl);
                    /*@switchbreak@*/ break;
                case 2:         /* g */
                    (void) mpnsethex(&_dig->g, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     g = "),  mpfprintln(stderr, _dig->g.size, _dig->g.data);
                    /*@switchbreak@*/ break;
                case 3:         /* y */
                    (void) mpnsethex(&_dig->y, pgpMpiHex(p));
if (_debug && _print)
fprintf(stderr, "\t     y = "),  mpfprintln(stderr, _dig->y.size, _dig->y.data);
                    /*@switchbreak@*/ break;
                default:
                    /*@switchbreak@*/ break;
                }
            }
            pgpPrtStr("", pgpPublicDSA[i]);
        } else if (pubkey_algo == PGPPUBKEYALGO_ELGAMAL_ENCRYPT) {
            if (i >= 3) break;
            pgpPrtStr("", pgpPublicELGAMAL[i]);
        } else {
            if (_print)
                fprintf(stderr, "%7d", i);
        }
        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 -shiftimplementation @*/ /* FIX: unsigned cast */
            i = (16 + (p[11] & 0xf)) << ((p[11] >> 4) + 6);
            /*@=shiftnegative =shiftimplementation @*/
            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)
        /*@globals _digp @*/
        /*@modifies *_digp @*/
{
    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();

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

        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();

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

        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;
}

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

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 pgpPubkeyFingerprint(const byte * pkt, /*@unused@*/ unsigned int pktlen,
                byte * keyid)
{
    const byte *s = pkt;
    DIGEST_CTX ctx;
    byte version;
    int rc = -1;        /* assume failure. */

    if (pkt[0] != 0x99)
        return rc;
    version = pkt[3];

    switch (version) {
    case 3:
      { pgpPktKeyV3 v = (pgpPktKeyV3) (pkt + 3);

        s += sizeof(pkt[0]) + sizeof(pkt[1]) + sizeof(pkt[2]) + sizeof(*v);
        switch (v->pubkey_algo) {
        case PGPPUBKEYALGO_RSA:
            s += (pgpMpiLen(s) - 8);
/*@-boundswrite@*/
            memmove(keyid, s, 8);
/*@=boundswrite@*/
            rc = 0;
            /*@innerbreak@*/ break;
        default:        /* TODO: md5 of mpi bodies (i.e. no length) */
            /*@innerbreak@*/ break;
        }
      } break;
    case 4:
      { pgpPktKeyV4 v = (pgpPktKeyV4) (pkt + 3);
        byte * SHA1 = NULL;
        int i;

        s += sizeof(pkt[0]) + sizeof(pkt[1]) + sizeof(pkt[2]) + sizeof(*v);
        switch (v->pubkey_algo) {
        case PGPPUBKEYALGO_RSA:
            for (i = 0; i < 2; i++)
                s += pgpMpiLen(s);
            /*@innerbreak@*/ break;
        case PGPPUBKEYALGO_DSA:
            for (i = 0; i < 4; i++)
                s += pgpMpiLen(s);
            /*@innerbreak@*/ break;
        }

        ctx = rpmDigestInit(PGPHASHALGO_SHA1, RPMDIGEST_NONE);
        (void) rpmDigestUpdate(ctx, pkt, (s-pkt));
        (void) rpmDigestFinal(ctx, (void **)&SHA1, NULL, 0);

        s = SHA1 + 12;
/*@-boundswrite@*/
        memmove(keyid, s, 8);
/*@=boundswrite@*/
        rc = 0;

        if (SHA1) free(SHA1);
      } break;
    }
    return rc;
}

int pgpPrtPkt(const byte *pkt, unsigned int pleft)
{
    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;
    if (pktlen > pleft)
        return -1;

    h = pkt + 1 + plen;
    switch (tag) {
    case PGPTAG_SIGNATURE:
        rc = pgpPrtSig(tag, h, hlen);
        break;
    case PGPTAG_PUBLIC_KEY:
        /* Get the public key fingerprint. */
        if (_digp) {
/*@-mods@*/
            if (!pgpPubkeyFingerprint(pkt, pktlen, _digp->signid))
                _digp->saved |= PGPDIG_SAVED_ID;
            else
                memset(_digp->signid, 0, sizeof(_digp->signid));
/*@=mods@*/
        }
        /*@fallthrough@*/
    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);
}

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

/*@-boundswrite@*/
void pgpCleanDig(pgpDig 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@*/

        memset(&dig->signature, 0, sizeof(dig->signature));
        memset(&dig->pubkey, 0, sizeof(dig->pubkey));

        dig->md5 = _free(dig->md5);
        dig->sha1 = _free(dig->sha1);
        mpnfree(&dig->hm);
        mpnfree(&dig->r);
        mpnfree(&dig->s);

        (void) rsapkFree(&dig->rsa_pk);
        mpnfree(&dig->m);
        mpnfree(&dig->c);
        mpnfree(&dig->rsahm);
    }
/*@-nullstate@*/
    return;
/*@=nullstate@*/
}
/*@=boundswrite@*/

pgpDig pgpFreeDig(/*@only@*/ /*@null@*/ pgpDig dig)
        /*@modifies dig @*/
{
    if (dig != NULL) {

        /* DUmp the signature/pubkey data. */
        pgpCleanDig(dig);

        /*@-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;

        mpbfree(&dig->p);
        mpbfree(&dig->q);
        mpnfree(&dig->g);
        mpnfree(&dig->y);
        mpnfree(&dig->hm);
        mpnfree(&dig->r);
        mpnfree(&dig->s);

#ifdef  NOTYET
        /*@-branchstate@*/
        if (dig->hdrmd5ctx != NULL)
            (void) rpmDigestFinal(dig->hdrmd5ctx, NULL, NULL, 0);
        /*@=branchstate@*/
        dig->hdrmd5ctx = NULL;
#endif

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

        mpbfree(&dig->rsa_pk.n);
        mpnfree(&dig->rsa_pk.e);
        mpnfree(&dig->m);
        mpnfree(&dig->c);
        mpnfree(&dig->hm);

        dig = _free(dig);
    }
    return dig;
}

int pgpPrtPkts(const byte * pkts, unsigned int pktlen, pgpDig dig, int printing)
        /*@globals _dig, _digp, _print @*/
        /*@modifies _dig, _digp, *_digp, _print @*/
{
    unsigned int val = *pkts;
    const byte *p;
    unsigned int pleft;
    int len;

    _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;

    for (p = pkts, pleft = pktlen; p < (pkts + pktlen); p += len, pleft -= len) {
        len = pgpPrtPkt(p, pleft);
        if (len <= 0)
            return len;
        if (len > pleft)        /* XXX shouldn't happen */
            break;
    }
    return 0;
}

/*@-boundswrite@*/
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_t crcpkt, crc;
    const char * armortype = NULL;
    char * t, * te;
    int pstate = 0;
    pgpArmor ec = PGPARMOR_ERR_NO_BEGIN_PGP;    /* 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) {
                ec = PGPARMOR_ERR_UNKNOWN_ARMOR_TYPE;
                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 ")) {
                ec = PGPARMOR_ERR_NO_END_PGP;
                goto exit;
            }
            *t = '\0';          /* Terminate encoded crc */
            t += sizeof("-----END PGP ")-1;
            if (t >= te) continue;

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

            t += strlen(armortype);
            if (t >= te) continue;

            if (!TOKEQ(t, "-----")) {
                ec = PGPARMOR_ERR_NO_END_PGP;
                goto exit;
            }
            t += (sizeof("-----")-1);
            if (t >= te) continue;
            /* XXX permitting \r here is not RFC-2440 compliant <shrug> */
            if (!(*t == '\n' || *t == '\r')) continue;

            crcdec = NULL;
            crclen = 0;
            if (b64decode(crcenc, (void **)&crcdec, &crclen) != 0) {
                ec = PGPARMOR_ERR_CRC_DECODE;
                goto exit;
            }
            crcpkt = pgpGrab(crcdec, crclen);
            crcdec = _free(crcdec);
            dec = NULL;
            declen = 0;
            if (b64decode(enc, (void **)&dec, &declen) != 0) {
                ec = PGPARMOR_ERR_BODY_DECODE;
                goto exit;
            }
            crc = pgpCRC(dec, declen);
            if (crcpkt != crc) {
                ec = PGPARMOR_ERR_CRC_CHECK;
                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;
}
/*@=boundswrite@*/

char * pgpArmorWrap(int atype, const unsigned char * s, size_t ns)
{
    const char * enc;
    char * t;
    size_t nt;
    char * val;
    int lc;

    nt = ((ns + 2) / 3) * 4;
    /*@-globs@*/
    /* Add additional bytes necessary for eol string(s). */
    if (b64encode_chars_per_line > 0 && b64encode_eolstr != NULL) {
        lc = (nt + b64encode_chars_per_line - 1) / b64encode_chars_per_line;
       if (((nt + b64encode_chars_per_line - 1) % b64encode_chars_per_line) != 0)
        ++lc;
        nt += lc * strlen(b64encode_eolstr);
    }
    /*@=globs@*/

    nt += 512;  /* XXX slop for armor and crc */

/*@-boundswrite@*/
    val = t = xmalloc(nt + 1);
    *t = '\0';
    t = stpcpy(t, "-----BEGIN PGP ");
    t = stpcpy(t, pgpValStr(pgpArmorTbl, atype));
    /*@-globs@*/
    t = stpcpy( stpcpy(t, "-----\nVersion: rpm-"), VERSION);
    /*@=globs@*/
    t = stpcpy(t, " (beecrypt-4.1.2)\n\n");

    if ((enc = b64encode(s, ns)) != NULL) {
        t = stpcpy(t, enc);
        enc = _free(enc);
        if ((enc = b64crc(s, ns)) != NULL) {
            *t++ = '=';
            t = stpcpy(t, enc);
            enc = _free(enc);
        }
    }
        
    t = stpcpy(t, "-----END PGP ");
    t = stpcpy(t, pgpValStr(pgpArmorTbl, atype));
    t = stpcpy(t, "-----\n");
/*@=boundswrite@*/

    return val;
}

/*@=boundsread@*/

---