folkslinux
/
rpm
mirror of https://github.com/rpm-software-management/rpm.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
rpm/rpmio/rpmpgp.c

1654 lines
41 KiB
C
Raw Blame History

/** \ingroup rpmio signature
* \file rpmio/rpmpgp.c
* Routines to handle RFC-2440 detached signatures.
*/
#include "system.h"
#include <pthread.h>
#include <rpm/rpmstring.h>
#include <rpm/rpmlog.h>
#include "rpmio/digest.h"
#include "rpmio/rpmio_internal.h" /* XXX rpmioSlurp */
#include "debug.h"
static int _debug = 0;
static int _print = 0;
static int _crypto_initialized = 0;
static int _new_process = 1;
typedef const struct pgpValTbl_s {
int val;
char const * const str;
} * pgpValTbl;
static struct pgpValTbl_s const 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" },
};
static struct pgpValTbl_s const 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" },
};
static struct pgpValTbl_s const 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" },
};
static struct pgpValTbl_s const pgpCompressionTbl[] = {
{ PGPCOMPRESSALGO_NONE, "Uncompressed" },
{ PGPCOMPRESSALGO_ZIP, "ZIP" },
{ PGPCOMPRESSALGO_ZLIB, "ZLIB" },
{ PGPCOMPRESSALGO_BZIP2, "BZIP2" },
{ -1, "Unknown compression algorithm" },
};
static struct pgpValTbl_s const 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" },
{ PGPHASHALGO_SHA224, "SHA224" },
{ -1, "Unknown hash algorithm" },
};
static struct pgpValTbl_s const pgpKeyServerPrefsTbl[] = {
{ 0x80, "No-modify" },
{ -1, "Unknown key server preference" },
};
static struct pgpValTbl_s const 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" },
};
static struct pgpValTbl_s const 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" },
};
static struct pgpValTbl_s const 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" }
};
static struct pgpValTbl_s const pgpArmorKeyTbl[] = {
{ PGPARMORKEY_VERSION, "Version: " },
{ PGPARMORKEY_COMMENT, "Comment: " },
{ PGPARMORKEY_MESSAGEID, "MessageID: " },
{ PGPARMORKEY_HASH, "Hash: " },
{ PGPARMORKEY_CHARSET, "Charset: " },
{ -1, "Unknown armor key" }
};
static void pgpPrtNL(void)
{
if (!_print) return;
fprintf(stderr, "\n");
}
static void pgpPrtInt(const char *pre, int i)
{
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
fprintf(stderr, " %d", i);
}
static void pgpPrtStr(const char *pre, const char *s)
{
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
fprintf(stderr, " %s", s);
}
static const char * pgpValStr(pgpValTbl vs, uint8_t val)
{
do {
if (vs->val == val)
break;
} while ((++vs)->val != -1);
return vs->str;
}
static pgpValTbl pgpValTable(pgpValType type)
{
switch (type) {
case PGPVAL_TAG: return pgpTagTbl;
case PGPVAL_ARMORBLOCK: return pgpArmorTbl;
case PGPVAL_ARMORKEY: return pgpArmorKeyTbl;
case PGPVAL_SIGTYPE: return pgpSigTypeTbl;
case PGPVAL_SUBTYPE: return pgpSubTypeTbl;
case PGPVAL_PUBKEYALGO: return pgpPubkeyTbl;
case PGPVAL_SYMKEYALGO: return pgpSymkeyTbl;
case PGPVAL_COMPRESSALGO: return pgpCompressionTbl;
case PGPVAL_HASHALGO: return pgpHashTbl;
case PGPVAL_SERVERPREFS: return pgpKeyServerPrefsTbl;
default:
break;
}
return NULL;
}
const char * pgpValString(pgpValType type, uint8_t val)
{
pgpValTbl tbl = pgpValTable(type);
return (tbl != NULL) ? pgpValStr(tbl, val) : NULL;
}
static void pgpPrtHex(const char *pre, const uint8_t *p, size_t plen)
{
char *hex = NULL;
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
hex = pgpHexStr(p, plen);
fprintf(stderr, " %s", hex);
free(hex);
}
static void pgpPrtVal(const char * pre, pgpValTbl vs, uint8_t val)
{
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
fprintf(stderr, "%s(%u)", pgpValStr(vs, val), (unsigned)val);
}
/** \ingroup rpmpgp
* Return no. of bits in a multiprecision integer.
* @param p pointer to multiprecision integer
* @return no. of bits
*/
static
unsigned int pgpMpiBits(const uint8_t *p)
{
return ((p[0] << 8) | p[1]);
}
/** \ingroup rpmpgp
* Return no. of bytes in a multiprecision integer.
* @param p pointer to multiprecision integer
* @return no. of bytes
*/
static
size_t pgpMpiLen(const uint8_t *p)
{
return (2 + ((pgpMpiBits(p)+7)>>3));
}
/** \ingroup rpmpgp
* Return hex formatted representation of a multiprecision integer.
* @param p bytes
* @return hex formatted string (malloc'ed)
*/
static inline
char * pgpMpiStr(const uint8_t *p)
{
char *str = NULL;
char *hex = pgpHexStr(p+2, pgpMpiLen(p)-2);
rasprintf(&str, "[%4u]: %s", pgpGrab(p, (size_t) 2), hex);
free(hex);
return str;
}
/** \ingroup rpmpgp
* Return value of an OpenPGP string.
* @param vs table of (string,value) pairs
* @param s string token to lookup
* @param se end-of-string address
* @return byte value
*/
static inline
int pgpValTok(pgpValTbl vs, const char * s, const char * se)
{
do {
size_t vlen = strlen(vs->str);
if (vlen <= (se-s) && rstreqn(s, vs->str, vlen))
break;
} while ((++vs)->val != -1);
return vs->val;
}
/**
* @return 0 on success
*/
static int pgpMpiSet(const char * pre, unsigned int lbits,
uint8_t *dest, const uint8_t * p, const uint8_t * pend)
{
unsigned int mbits = pgpMpiBits(p);
unsigned int nbits;
size_t nbytes;
uint8_t *t = dest;
unsigned int ix;
if ((p + ((mbits+7) >> 3)) > pend)
return 1;
if (mbits > lbits)
return 1;
nbits = (lbits > mbits ? lbits : mbits);
nbytes = ((nbits + 7) >> 3);
ix = (nbits - mbits) >> 3;
if (_debug)
fprintf(stderr, "*** mbits %u nbits %u nbytes %zu ix %u\n", mbits, nbits, nbytes, ix);
if (ix > 0) memset(t, '\0', ix);
memcpy(t+ix, p+2, nbytes-ix);
if (_debug)
fprintf(stderr, "*** %s %s\n", pre, pgpHexStr(dest, nbytes));
return 0;
}
/**
* @return NULL on error
*/
static SECItem *pgpMpiItem(PRArenaPool *arena, SECItem *item, const uint8_t *p)
{
size_t nbytes = pgpMpiLen(p)-2;
if (item == NULL) {
if ((item=SECITEM_AllocItem(arena, item, nbytes)) == NULL)
return item;
} else {
if (arena != NULL)
item->data = PORT_ArenaGrow(arena, item->data, item->len, nbytes);
else
item->data = PORT_Realloc(item->data, nbytes);
if (item->data == NULL) {
if (arena == NULL)
SECITEM_FreeItem(item, PR_TRUE);
return NULL;
}
}
memcpy(item->data, p+2, nbytes);
item->len = nbytes;
return item;
}
/*@=boundswrite@*/
static SECKEYPublicKey *pgpNewPublicKey(KeyType type)
{
PRArenaPool *arena;
SECKEYPublicKey *key;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (arena == NULL)
return NULL;
key = PORT_ArenaZAlloc(arena, sizeof(SECKEYPublicKey));
if (key == NULL) {
PORT_FreeArena(arena, PR_FALSE);
return NULL;
}
key->keyType = type;
key->pkcs11ID = CK_INVALID_HANDLE;
key->pkcs11Slot = NULL;
key->arena = arena;
return key;
}
/** \ingroup rpmpgp
* Is buffer at beginning of an OpenPGP packet?
* @param p buffer
* @return 1 if an OpenPGP packet, 0 otherwise
*/
static inline
int pgpIsPkt(const uint8_t * p)
{
unsigned int val = *p++;
pgpTag tag;
int rc;
/* XXX can't deal with these. */
if (!(val & 0x80))
return 0;
if (val & 0x40)
tag = (pgpTag)(val & 0x3f);
else
tag = (pgpTag)((val >> 2) & 0xf);
switch (tag) {
case PGPTAG_MARKER:
case PGPTAG_SYMMETRIC_SESSION_KEY:
case PGPTAG_ONEPASS_SIGNATURE:
case PGPTAG_PUBLIC_KEY:
case PGPTAG_SECRET_KEY:
case PGPTAG_PUBLIC_SESSION_KEY:
case PGPTAG_SIGNATURE:
case PGPTAG_COMMENT:
case PGPTAG_COMMENT_OLD:
case PGPTAG_LITERAL_DATA:
case PGPTAG_COMPRESSED_DATA:
case PGPTAG_SYMMETRIC_DATA:
rc = 1;
break;
case PGPTAG_PUBLIC_SUBKEY:
case PGPTAG_SECRET_SUBKEY:
case PGPTAG_USER_ID:
case PGPTAG_RESERVED:
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:
rc = 0;
break;
}
return rc;
}
#define CRC24_INIT 0xb704ce
#define CRC24_POLY 0x1864cfb
/** \ingroup rpmpgp
* Return CRC of a buffer.
* @param octets bytes
* @param len no. of bytes
* @return crc of buffer
*/
static inline
unsigned int pgpCRC(const uint8_t *octets, size_t len)
{
unsigned int crc = CRC24_INIT;
size_t i;
while (len--) {
crc ^= (*octets++) << 16;
for (i = 0; i < 8; i++) {
crc <<= 1;
if (crc & 0x1000000)
crc ^= CRC24_POLY;
}
}
return crc & 0xffffff;
}
static int pgpPrtSubType(const uint8_t *h, size_t hlen, pgpSigType sigtype,
pgpDigParams _digp)
{
const uint8_t *p = h;
size_t plen, 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]);
break;
case PGPSUBTYPE_PREFER_HASH: /* preferred hash algorithms */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpHashTbl, p[i]);
break;
case PGPSUBTYPE_PREFER_COMPRESS:/* preferred compression algorithms */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpCompressionTbl, p[i]);
break;
case PGPSUBTYPE_KEYSERVER_PREFERS:/* key server preferences */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpKeyServerPrefsTbl, p[i]);
break;
case PGPSUBTYPE_SIG_CREATE_TIME:
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));
}
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);
break;
case PGPSUBTYPE_ISSUER_KEYID: /* issuer key ID */
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));
}
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);
break;
}
pgpPrtNL();
p += plen;
hlen -= plen;
}
return 0;
}
static const char * const pgpSigRSA[] = {
" m**d =",
NULL,
};
static const char * const pgpSigDSA[] = {
" r =",
" s =",
NULL,
};
#ifndef DSA_SUBPRIME_LEN
#define DSA_SUBPRIME_LEN 20
#endif
static int pgpPrtSigParams(pgpTag tag, uint8_t pubkey_algo, uint8_t sigtype,
const uint8_t *p, const uint8_t *h, size_t hlen, pgpDig _dig)
{
const uint8_t * pend = h + hlen;
size_t i;
SECItem dsaraw;
unsigned char dsabuf[2*DSA_SUBPRIME_LEN];
char *mpi;
dsaraw.type = 0;
dsaraw.data = dsabuf;
dsaraw.len = sizeof(dsabuf);
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 */
_dig->sigdata = pgpMpiItem(NULL, _dig->sigdata, p);
if (_dig->sigdata == NULL)
return 1;
break;
default:
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:
memset(dsaraw.data, '\0', 2*DSA_SUBPRIME_LEN);
/* r */
xx = pgpMpiSet(pgpSigDSA[i], DSA_SUBPRIME_LEN*8, dsaraw.data, p, pend);
break;
case 1: /* s */
xx = pgpMpiSet(pgpSigDSA[i], DSA_SUBPRIME_LEN*8, dsaraw.data + DSA_SUBPRIME_LEN, p, pend);
if (_dig->sigdata != NULL)
SECITEM_FreeItem(_dig->sigdata, PR_FALSE);
else if ((_dig->sigdata=SECITEM_AllocItem(NULL, NULL, 0)) == NULL) {
xx = 1;
break;
}
if (DSAU_EncodeDerSig(_dig->sigdata, &dsaraw) != SECSuccess)
xx = 1;
break;
default:
xx = 1;
break;
}
if (xx) return xx;
}
pgpPrtStr("", pgpSigDSA[i]);
} else {
if (_print)
fprintf(stderr, "%7zd", i);
}
mpi = pgpMpiStr(p);
pgpPrtStr("", mpi);
free(mpi);
pgpPrtNL();
}
return 0;
}
static int pgpPrtSig(pgpTag tag, const uint8_t *h, size_t hlen,
pgpDig _dig, pgpDigParams _digp)
{
uint8_t version = h[0];
uint8_t * p;
size_t 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 = ((uint8_t *)v) + sizeof(*v);
rc = pgpPrtSigParams(tag, v->pubkey_algo, v->sigtype, p, h, hlen, _dig);
} 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[%zu] -- %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, _digp);
p += plen;
plen = pgpGrab(p,2);
p += 2;
if ((p + plen) > (h + hlen))
return 1;
if (_debug && _print)
fprintf(stderr, " unhash[%zu] -- %s\n", plen, pgpHexStr(p, plen));
(void) pgpPrtSubType(p, plen, v->sigtype, _digp);
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, _dig);
} break;
default:
rc = 1;
break;
}
return rc;
}
static const char * const pgpPublicRSA[] = {
" n =",
" e =",
NULL,
};
#ifdef NOTYET
static const char * const pgpSecretRSA[] = {
" d =",
" p =",
" q =",
" u =",
NULL,
};
#endif
static const char * const pgpPublicDSA[] = {
" p =",
" q =",
" g =",
" y =",
NULL,
};
#ifdef NOTYET
static const char * const pgpSecretDSA[] = {
" x =",
NULL,
};
#endif
static const char * const pgpPublicELGAMAL[] = {
" p =",
" g =",
" y =",
NULL,
};
#ifdef NOTYET
static const char * const pgpSecretELGAMAL[] = {
" x =",
NULL,
};
#endif
char * pgpHexStr(const uint8_t *p, size_t plen)
{
char *t, *str;
str = t = xmalloc(plen * 2 + 1);
static char const hex[] = "0123456789abcdef";
while (plen-- > 0) {
size_t i;
i = *p++;
*t++ = hex[ (i >> 4) & 0xf ];
*t++ = hex[ (i ) & 0xf ];
}
*t = '\0';
return str;
}
static const uint8_t * pgpPrtPubkeyParams(uint8_t pubkey_algo,
const uint8_t *p, const uint8_t *h, size_t hlen,
pgpDig _dig)
{
size_t i;
for (i = 0; p < &h[hlen]; i++, p += pgpMpiLen(p)) {
char * mpi;
if (pubkey_algo == PGPPUBKEYALGO_RSA) {
if (i >= 2) break;
if (_dig) {
if (_dig->keydata == NULL) {
_dig->keydata = pgpNewPublicKey(rsaKey);
if (_dig->keydata == NULL)
break; /* error abort? */
}
switch (i) {
case 0: /* n */
pgpMpiItem(_dig->keydata->arena, &_dig->keydata->u.rsa.modulus, p);
break;
case 1: /* e */
pgpMpiItem(_dig->keydata->arena, &_dig->keydata->u.rsa.publicExponent, p);
break;
default:
break;
}
}
pgpPrtStr("", pgpPublicRSA[i]);
} else if (pubkey_algo == PGPPUBKEYALGO_DSA) {
if (i >= 4) break;
if (_dig) {
if (_dig->keydata == NULL) {
_dig->keydata = pgpNewPublicKey(dsaKey);
if (_dig->keydata == NULL)
break; /* error abort? */
}
switch (i) {
case 0: /* p */
pgpMpiItem(_dig->keydata->arena, &_dig->keydata->u.dsa.params.prime, p);
break;
case 1: /* q */
pgpMpiItem(_dig->keydata->arena, &_dig->keydata->u.dsa.params.subPrime, p);
break;
case 2: /* g */
pgpMpiItem(_dig->keydata->arena, &_dig->keydata->u.dsa.params.base, p);
break;
case 3: /* y */
pgpMpiItem(_dig->keydata->arena, &_dig->keydata->u.dsa.publicValue, p);
break;
default:
break;
}
}
pgpPrtStr("", pgpPublicDSA[i]);
} else if (pubkey_algo == PGPPUBKEYALGO_ELGAMAL_ENCRYPT) {
if (i >= 3) break;
pgpPrtStr("", pgpPublicELGAMAL[i]);
} else {
if (_print)
fprintf(stderr, "%7zd", i);
}
mpi = pgpMpiStr(p);
pgpPrtStr("", mpi);
free(mpi);
pgpPrtNL();
}
return p;
}
static const uint8_t * pgpPrtSeckeyParams(uint8_t pubkey_algo,
const uint8_t *p, const uint8_t *h, size_t hlen)
{
size_t 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;
break;
case 0x01:
pgpPrtVal(" salted ", pgpHashTbl, p[2]);
pgpPrtHex("", p+3, 8);
p += 10;
break;
case 0x03:
pgpPrtVal(" iterated/salted ", pgpHashTbl, p[2]);
/* FIX: unsigned cast */
i = (16 + (p[11] & 0xf)) << ((p[11] >> 4) + 6);
pgpPrtHex("", p+3, 8);
pgpPrtInt(" iter", i);
p += 11;
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)) {
char *mpi;
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);
}
mpi = pgpMpiStr(p);
pgpPrtStr("", mpi);
free(mpi);
pgpPrtNL();
}
#else
pgpPrtHex(" secret", p, (hlen - (p - h) - 2));
pgpPrtNL();
p += (hlen - (p - h) - 2);
#endif
pgpPrtHex(" checksum", p, 2);
pgpPrtNL();
return p;
}
static int pgpPrtKey(pgpTag tag, const uint8_t *h, size_t hlen,
pgpDig _dig, pgpDigParams _digp)
{
uint8_t version = *h;
const uint8_t * p;
size_t 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 %zu 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 = ((uint8_t *)v) + sizeof(*v);
p = pgpPrtPubkeyParams(v->pubkey_algo, p, h, hlen, _dig);
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 = ((uint8_t *)v) + sizeof(*v);
p = pgpPrtPubkeyParams(v->pubkey_algo, p, h, hlen, _dig);
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;
}
static int pgpPrtUserID(pgpTag tag, const uint8_t *h, size_t hlen,
pgpDigParams _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;
}
static int pgpPrtComment(pgpTag tag, const uint8_t *h, size_t hlen)
{
size_t i = hlen;
pgpPrtVal("", pgpTagTbl, tag);
if (_print)
fprintf(stderr, " ");
while (i > 0) {
size_t j;
if (*h >= ' ' && *h <= 'z') {
if (_print)
fprintf(stderr, "%s", (const char *)h);
j = strlen((const char*)h);
while (h[j] == '\0')
j++;
} else {
pgpPrtHex("", h, i);
j = i;
}
i -= j;
h += j;
}
pgpPrtNL();
return 0;
}
int pgpPubkeyFingerprint(const uint8_t * pkt, size_t pktlen, pgpKeyID_t keyid)
{
unsigned int val = *pkt;
size_t plen, hlen;
const uint8_t *se, *h;
DIGEST_CTX ctx;
int rc = -1; /* assume failure. */
if (!(val & 0x80))
return rc;
if (val & 0x40) {
plen = pgpLen(pkt+1, &hlen);
} else {
plen = (1 << (val & 0x3));
hlen = pgpGrab(pkt+1, plen);
}
if (pktlen > 0 && 1 + plen + hlen > pktlen)
return rc;
h = pkt + 1 + plen;
switch (h[0]) {
case 3:
{ pgpPktKeyV3 v = (pgpPktKeyV3) (h);
se = (uint8_t *)(v + 1);
switch (v->pubkey_algo) {
case PGPPUBKEYALGO_RSA:
se += pgpMpiLen(se);
memmove(keyid, (se-8), 8);
rc = 0;
break;
default: /* TODO: md5 of mpi bodies (i.e. no length) */
break;
}
} break;
case 4:
{ pgpPktKeyV4 v = (pgpPktKeyV4) (h);
uint8_t * d = NULL;
uint8_t in[3];
size_t dlen;
int i;
se = (uint8_t *)(v + 1);
switch (v->pubkey_algo) {
case PGPPUBKEYALGO_RSA:
for (i = 0; i < 2; i++)
se += pgpMpiLen(se);
break;
case PGPPUBKEYALGO_DSA:
for (i = 0; i < 4; i++)
se += pgpMpiLen(se);
break;
}
ctx = rpmDigestInit(PGPHASHALGO_SHA1, RPMDIGEST_NONE);
i = se - h;
in[0] = 0x99;
in[1] = i >> 8;
in[2] = i;
(void) rpmDigestUpdate(ctx, in, 3);
(void) rpmDigestUpdate(ctx, h, i);
(void) rpmDigestFinal(ctx, (void **)&d, &dlen, 0);
if (d) {
memmove(keyid, (d + (dlen-8)), 8);
free(d);
rc = 0;
}
} break;
}
return rc;
}
int pgpExtractPubkeyFingerprint(const char * b64pkt, pgpKeyID_t keyid)
{
uint8_t * pkt;
size_t pktlen;
if (b64decode(b64pkt, (void **)&pkt, &pktlen))
return -1; /* on error */
(void) pgpPubkeyFingerprint(pkt, pktlen, keyid);
pkt = _free(pkt);
return sizeof(keyid); /* no. of bytes of pubkey signid */
}
static int pgpPrtPkt(const uint8_t *pkt, size_t pleft,
pgpDig _dig, pgpDigParams _digp)
{
unsigned int val = *pkt;
size_t pktlen;
pgpTag tag;
size_t plen;
const uint8_t *h;
size_t 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, _dig, _digp);
break;
case PGPTAG_PUBLIC_KEY:
/* Get the public key fingerprint. */
if (_digp) {
if (!pgpPubkeyFingerprint(pkt, pktlen, _digp->signid))
_digp->saved |= PGPDIG_SAVED_ID;
else
memset(_digp->signid, 0, sizeof(_digp->signid));
}
rc = pgpPrtKey(tag, h, hlen, _dig, _digp);
break;
case PGPTAG_USER_ID:
rc = pgpPrtUserID(tag, h, hlen, _digp);
break;
case PGPTAG_COMMENT:
case PGPTAG_COMMENT_OLD:
rc = pgpPrtComment(tag, h, hlen);
break;
case PGPTAG_PUBLIC_SUBKEY:
case PGPTAG_SECRET_KEY:
case PGPTAG_SECRET_SUBKEY:
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;
}
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);
/* 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]);
}
memset(&dig->signature, 0, sizeof(dig->signature));
memset(&dig->pubkey, 0, sizeof(dig->pubkey));
if (dig->keydata != NULL) {
SECKEY_DestroyPublicKey(dig->keydata);
dig->keydata = NULL;
}
if (dig->sigdata != NULL) {
SECITEM_ZfreeItem(dig->sigdata, PR_TRUE);
dig->sigdata = NULL;
}
}
return;
}
pgpDig pgpFreeDig(pgpDig dig)
{
if (dig != NULL) {
/* DUmp the signature/pubkey data. */
pgpCleanDig(dig);
dig = _free(dig);
}
return dig;
}
int pgpPrtPkts(const uint8_t * pkts, size_t pktlen, pgpDig dig, int printing)
{
unsigned int val = *pkts;
const uint8_t *p;
size_t pleft;
int len;
pgpDigParams _digp = NULL;
_print = printing;
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, dig, _digp);
if (len <= 0)
return len;
if (len > pleft) /* XXX shouldn't happen */
break;
}
return 0;
}
static SECOidTag getSigAlg(pgpDigParams sigp)
{
SECOidTag sigalg = SEC_OID_UNKNOWN;
if (sigp->pubkey_algo == PGPPUBKEYALGO_DSA) {
/* assume SHA1 for now, NSS doesn't have SECOID's for other types */
sigalg = SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST;
} else if (sigp->pubkey_algo == PGPPUBKEYALGO_RSA) {
switch (sigp->hash_algo) {
case PGPHASHALGO_MD5:
sigalg = SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION;
break;
case PGPHASHALGO_MD2:
sigalg = SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION;
break;
case PGPHASHALGO_SHA1:
sigalg = SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION;
break;
case PGPHASHALGO_SHA256:
sigalg = SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION;
break;
case PGPHASHALGO_SHA384:
sigalg = SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION;
break;
case PGPHASHALGO_SHA512:
sigalg = SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION;
break;
default:
break;
}
}
return sigalg;
}
char *pgpIdentItem(pgpDigParams digp)
{
char *id = NULL;
if (digp) {
char *signid = pgpHexStr(digp->signid+4, sizeof(digp->signid)-4);
rasprintf(&id, _("V%d %s/%s %s, key ID %s"),
digp->version,
pgpValStr(pgpPubkeyTbl, digp->pubkey_algo),
pgpValStr(pgpHashTbl, digp->hash_algo),
pgpValStr(pgpTagTbl, digp->tag),
signid);
free(signid);
} else {
id = xstrdup(_("(none)"));
}
return id;
}
rpmRC pgpVerifySig(pgpDig dig, DIGEST_CTX hashctx)
{
DIGEST_CTX ctx = rpmDigestDup(hashctx);
uint8_t *hash = NULL;
size_t hashlen = 0;
rpmRC res = RPMRC_FAIL; /* assume failure */
pgpDigParams sigp = dig ? &dig->signature : NULL;
if (sigp == NULL || ctx == NULL)
goto exit;
if (sigp->hash != NULL)
rpmDigestUpdate(ctx, sigp->hash, sigp->hashlen);
if (sigp->version == 4) {
/* V4 trailer is six octets long (rfc4880) */
uint8_t trailer[6];
uint32_t nb = sigp->hashlen;
nb = htonl(nb);
trailer[0] = sigp->version;
trailer[1] = 0xff;
memcpy(trailer+2, &nb, 4);
rpmDigestUpdate(ctx, trailer, sizeof(trailer));
}
rpmDigestFinal(ctx, (void **)&hash, &hashlen, 0);
/* Compare leading 16 bits of digest for quick check. */
if (hash && memcmp(hash, sigp->signhash16, 2) == 0) {
SECItem digest = { .type = siBuffer, .data = hash, .len = hashlen };
SECItem *sig = dig->sigdata;
/* Zero-pad RSA signature to expected size if necessary */
if (sigp->pubkey_algo == PGPPUBKEYALGO_RSA) {
size_t siglen = SECKEY_SignatureLen(dig->keydata);
if (siglen > sig->len) {
size_t pad = siglen - sig->len;
if ((sig = SECITEM_AllocItem(NULL, NULL, siglen)) == NULL) {
goto exit;
}
memset(sig->data, 0, pad);
memcpy(sig->data+pad, dig->sigdata->data, dig->sigdata->len);
}
}
/* XXX VFY_VerifyDigest() is deprecated in NSS 3.12 */
if (VFY_VerifyDigest(&digest, dig->keydata, sig,
getSigAlg(sigp), NULL) == SECSuccess) {
res = RPMRC_OK;
}
if (sig != dig->sigdata) {
SECITEM_ZfreeItem(sig, 1);
}
}
exit:
free(hash);
return res;
}
static pgpArmor decodePkts(uint8_t *b, uint8_t **pkt, size_t *pktlen)
{
const char * enc = NULL;
const char * crcenc = NULL;
uint8_t * dec;
uint8_t * 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 */
if (pgpIsPkt(b)) {
#ifdef NOTYET /* XXX ASCII Pubkeys only, please. */
ec = 0; /* XXX fish out pkt type. */
#endif
goto exit;
}
#define TOKEQ(_s, _tok) (rstreqn((_s), (_tok), sizeof(_tok)-1))
for (t = (char *)b; t && *t; t = te) {
int rc;
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 = pgpValStr(pgpArmorTbl, rc);
t += strlen(armortype);
if (!TOKEQ(t, "-----"))
continue;
t += sizeof("-----")-1;
if (*t != '\n' && *t != '\r')
continue;
*t = '\0';
pstate++;
break;
case 1:
enc = NULL;
rc = pgpValTok(pgpArmorKeyTbl, t, te);
if (rc >= 0)
continue;
if (*t != '\n' && *t != '\r') {
pstate = 0;
continue;
}
enc = te; /* Start of encoded packets */
pstate++;
break;
case 2:
crcenc = NULL;
if (*t != '=')
continue;
*t++ = '\0'; /* Terminate encoded packets */
crcenc = t; /* Start of encoded crc */
pstate++;
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;
if (!rstreqn(t, armortype, strlen(armortype)))
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;
}
if (pkt) *pkt = dec;
if (pktlen) *pktlen = declen;
ec = PGPARMOR_PUBKEY; /* XXX ASCII Pubkeys only, please. */
goto exit;
break;
}
}
ec = PGPARMOR_NONE;
exit:
return ec;
}
pgpArmor pgpReadPkts(const char * fn, uint8_t ** pkt, size_t * pktlen)
{
uint8_t * b = NULL;
ssize_t blen;
pgpArmor ec = PGPARMOR_ERR_NO_BEGIN_PGP; /* XXX assume failure */
int rc = rpmioSlurp(fn, &b, &blen);
if (rc == 0 && b != NULL && blen > 0) {
ec = decodePkts(b, pkt, pktlen);
}
free(b);
return ec;
}
pgpArmor pgpParsePkts(const char *armor, uint8_t ** pkt, size_t * pktlen)
{
pgpArmor ec = PGPARMOR_ERR_NO_BEGIN_PGP; /* XXX assume failure */
if (armor && strlen(armor) > 0) {
uint8_t *b = (uint8_t*) xstrdup(armor);
ec = decodePkts(b, pkt, pktlen);
free(b);
}
return ec;
}
char * pgpArmorWrap(int atype, const unsigned char * s, size_t ns)
{
char *buf = NULL, *val = NULL;
char *enc = b64encode(s, ns, -1);
char *crc = b64crc(s, ns);
const char *valstr = pgpValStr(pgpArmorTbl, atype);
if (crc != NULL && enc != NULL) {
rasprintf(&buf, "%s=%s", enc, crc);
}
free(crc);
free(enc);
rasprintf(&val, "-----BEGIN PGP %s-----\nVersion: rpm-" VERSION " (NSS-3)\n\n"
"%s\n-----END PGP %s-----\n",
valstr, buf != NULL ? buf : "", valstr);
free(buf);
return val;
}
/*
* Only flag for re-initialization here, in the common case the child
* exec()'s something else shutting down NSS here would be waste of time.
*/
static void at_forkchild(void)
{
_new_process = 1;
}
int rpmInitCrypto(void) {
int rc = 0;
/* Lazy NSS shutdown for re-initialization after fork() */
if (_new_process && _crypto_initialized) {
rpmFreeCrypto();
}
/* Initialize NSS if not already done */
if (!_crypto_initialized) {
if (NSS_NoDB_Init(NULL) != SECSuccess) {
rc = -1;
} else {
_crypto_initialized = 1;
}
}
/* Register one post-fork handler per process */
if (_new_process) {
if (pthread_atfork(NULL, NULL, at_forkchild) != 0) {
rpmlog(RPMLOG_WARNING, _("Failed to register fork handler: %m\n"));
}
_new_process = 0;
}
return rc;
}
int rpmFreeCrypto(void)
{
int rc = 0;
if (_crypto_initialized) {
rc = (NSS_Shutdown() != SECSuccess);
_crypto_initialized = 0;
}
return rc;
}
Reference in New Issue View Git Blame Copy Permalink