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-rw-r--r--security/nss/lib/pkcs7/p7local.c1310
1 files changed, 1310 insertions, 0 deletions
diff --git a/security/nss/lib/pkcs7/p7local.c b/security/nss/lib/pkcs7/p7local.c
new file mode 100644
index 000000000..182e385b6
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7local.c
@@ -0,0 +1,1310 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Support routines for PKCS7 implementation, none of which are exported.
+ * This file should only contain things that are needed by both the
+ * encoding/creation side *and* the decoding/decryption side. Anything
+ * else should be static routines in the appropriate file.
+ */
+
+#include "p7local.h"
+
+#include "cryptohi.h"
+#include "secasn1.h"
+#include "secoid.h"
+#include "secitem.h"
+#include "pk11func.h"
+#include "secpkcs5.h"
+#include "secerr.h"
+
+/*
+ * -------------------------------------------------------------------
+ * Cipher stuff.
+ */
+
+typedef SECStatus (*sec_pkcs7_cipher_function)(void *,
+ unsigned char *,
+ unsigned *,
+ unsigned int,
+ const unsigned char *,
+ unsigned int);
+typedef SECStatus (*sec_pkcs7_cipher_destroy)(void *, PRBool);
+
+#define BLOCK_SIZE 4096
+
+struct sec_pkcs7_cipher_object {
+ void *cx;
+ sec_pkcs7_cipher_function doit;
+ sec_pkcs7_cipher_destroy destroy;
+ PRBool encrypt;
+ int block_size;
+ int pad_size;
+ int pending_count;
+ unsigned char pending_buf[BLOCK_SIZE];
+};
+
+SEC_ASN1_MKSUB(CERT_IssuerAndSNTemplate)
+SEC_ASN1_MKSUB(CERT_SetOfSignedCrlTemplate)
+SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate)
+SEC_ASN1_MKSUB(SEC_OctetStringTemplate)
+SEC_ASN1_MKSUB(SEC_SetOfAnyTemplate)
+
+/*
+ * Create a cipher object to do decryption, based on the given bulk
+ * encryption key and algorithm identifier (which may include an iv).
+ *
+ * XXX This interface, or one similar, would be really nice available
+ * in general... I tried to keep the pkcs7-specific stuff (mostly
+ * having to do with padding) out of here.
+ *
+ * XXX Once both are working, it might be nice to combine this and the
+ * function below (for starting up encryption) into one routine, and just
+ * have two simple cover functions which call it.
+ */
+sec_PKCS7CipherObject *
+sec_PKCS7CreateDecryptObject(PK11SymKey *key, SECAlgorithmID *algid)
+{
+ sec_PKCS7CipherObject *result;
+ SECOidTag algtag;
+ void *ciphercx;
+ CK_MECHANISM_TYPE cryptoMechType;
+ PK11SlotInfo *slot;
+ SECItem *param = NULL;
+
+ result = (struct sec_pkcs7_cipher_object *)
+ PORT_ZAlloc(sizeof(struct sec_pkcs7_cipher_object));
+ if (result == NULL)
+ return NULL;
+
+ ciphercx = NULL;
+ algtag = SECOID_GetAlgorithmTag(algid);
+
+ if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
+ SECItem *pwitem;
+
+ pwitem = (SECItem *)PK11_GetSymKeyUserData(key);
+ if (!pwitem) {
+ PORT_Free(result);
+ return NULL;
+ }
+
+ cryptoMechType = PK11_GetPBECryptoMechanism(algid, &param, pwitem);
+ if (cryptoMechType == CKM_INVALID_MECHANISM) {
+ PORT_Free(result);
+ SECITEM_FreeItem(param, PR_TRUE);
+ return NULL;
+ }
+ } else {
+ cryptoMechType = PK11_AlgtagToMechanism(algtag);
+ param = PK11_ParamFromAlgid(algid);
+ if (param == NULL) {
+ PORT_Free(result);
+ return NULL;
+ }
+ }
+
+ result->pad_size = PK11_GetBlockSize(cryptoMechType, param);
+ slot = PK11_GetSlotFromKey(key);
+ result->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : result->pad_size;
+ PK11_FreeSlot(slot);
+ ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_DECRYPT,
+ key, param);
+ SECITEM_FreeItem(param, PR_TRUE);
+ if (ciphercx == NULL) {
+ PORT_Free(result);
+ return NULL;
+ }
+
+ result->cx = ciphercx;
+ result->doit = (sec_pkcs7_cipher_function)PK11_CipherOp;
+ result->destroy = (sec_pkcs7_cipher_destroy)PK11_DestroyContext;
+ result->encrypt = PR_FALSE;
+ result->pending_count = 0;
+
+ return result;
+}
+
+/*
+ * Create a cipher object to do encryption, based on the given bulk
+ * encryption key and algorithm tag. Fill in the algorithm identifier
+ * (which may include an iv) appropriately.
+ *
+ * XXX This interface, or one similar, would be really nice available
+ * in general... I tried to keep the pkcs7-specific stuff (mostly
+ * having to do with padding) out of here.
+ *
+ * XXX Once both are working, it might be nice to combine this and the
+ * function above (for starting up decryption) into one routine, and just
+ * have two simple cover functions which call it.
+ */
+sec_PKCS7CipherObject *
+sec_PKCS7CreateEncryptObject(PLArenaPool *poolp, PK11SymKey *key,
+ SECOidTag algtag, SECAlgorithmID *algid)
+{
+ sec_PKCS7CipherObject *result;
+ void *ciphercx;
+ SECStatus rv;
+ CK_MECHANISM_TYPE cryptoMechType;
+ PK11SlotInfo *slot;
+ SECItem *param = NULL;
+ PRBool needToEncodeAlgid = PR_FALSE;
+
+ result = (struct sec_pkcs7_cipher_object *)
+ PORT_ZAlloc(sizeof(struct sec_pkcs7_cipher_object));
+ if (result == NULL)
+ return NULL;
+
+ ciphercx = NULL;
+ if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
+ SECItem *pwitem;
+
+ pwitem = (SECItem *)PK11_GetSymKeyUserData(key);
+ if (!pwitem) {
+ PORT_Free(result);
+ return NULL;
+ }
+
+ cryptoMechType = PK11_GetPBECryptoMechanism(algid, &param, pwitem);
+ if (cryptoMechType == CKM_INVALID_MECHANISM) {
+ PORT_Free(result);
+ SECITEM_FreeItem(param, PR_TRUE);
+ return NULL;
+ }
+ } else {
+ cryptoMechType = PK11_AlgtagToMechanism(algtag);
+ param = PK11_GenerateNewParam(cryptoMechType, key);
+ if (param == NULL) {
+ PORT_Free(result);
+ return NULL;
+ }
+ needToEncodeAlgid = PR_TRUE;
+ }
+
+ result->pad_size = PK11_GetBlockSize(cryptoMechType, param);
+ slot = PK11_GetSlotFromKey(key);
+ result->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : result->pad_size;
+ PK11_FreeSlot(slot);
+ ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_ENCRYPT,
+ key, param);
+ if (ciphercx == NULL) {
+ PORT_Free(result);
+ SECITEM_FreeItem(param, PR_TRUE);
+ return NULL;
+ }
+
+ /*
+ * These are placed after the CreateContextBySymKey() because some
+ * mechanisms have to generate their IVs from their card (i.e. FORTEZZA).
+ * Don't move it from here.
+ */
+ if (needToEncodeAlgid) {
+ rv = PK11_ParamToAlgid(algtag, param, poolp, algid);
+ if (rv != SECSuccess) {
+ PORT_Free(result);
+ SECITEM_FreeItem(param, PR_TRUE);
+ PK11_DestroyContext(ciphercx, PR_TRUE);
+ return NULL;
+ }
+ }
+ SECITEM_FreeItem(param, PR_TRUE);
+
+ result->cx = ciphercx;
+ result->doit = (sec_pkcs7_cipher_function)PK11_CipherOp;
+ result->destroy = (sec_pkcs7_cipher_destroy)PK11_DestroyContext;
+ result->encrypt = PR_TRUE;
+ result->pending_count = 0;
+
+ return result;
+}
+
+/*
+ * Destroy the cipher object.
+ */
+static void
+sec_pkcs7_destroy_cipher(sec_PKCS7CipherObject *obj)
+{
+ (*obj->destroy)(obj->cx, PR_TRUE);
+ PORT_Free(obj);
+}
+
+void
+sec_PKCS7DestroyDecryptObject(sec_PKCS7CipherObject *obj)
+{
+ PORT_Assert(obj != NULL);
+ if (obj == NULL)
+ return;
+ PORT_Assert(!obj->encrypt);
+ sec_pkcs7_destroy_cipher(obj);
+}
+
+void
+sec_PKCS7DestroyEncryptObject(sec_PKCS7CipherObject *obj)
+{
+ PORT_Assert(obj != NULL);
+ if (obj == NULL)
+ return;
+ PORT_Assert(obj->encrypt);
+ sec_pkcs7_destroy_cipher(obj);
+}
+
+/*
+ * XXX I think all of the following lengths should be longs instead
+ * of ints, but our current crypto interface uses ints, so I did too.
+ */
+
+/*
+ * What will be the output length of the next call to decrypt?
+ * Result can be used to perform memory allocations. Note that the amount
+ * is exactly accurate only when not doing a block cipher or when final
+ * is false, otherwise it is an upper bound on the amount because until
+ * we see the data we do not know how many padding bytes there are
+ * (always between 1 and bsize).
+ *
+ * Note that this can return zero, which does not mean that the decrypt
+ * operation can be skipped! (It simply means that there are not enough
+ * bytes to make up an entire block; the bytes will be reserved until
+ * there are enough to encrypt/decrypt at least one block.) However,
+ * if zero is returned it *does* mean that no output buffer need be
+ * passed in to the subsequent decrypt operation, as no output bytes
+ * will be stored.
+ */
+unsigned int
+sec_PKCS7DecryptLength(sec_PKCS7CipherObject *obj, unsigned int input_len,
+ PRBool final)
+{
+ int blocks, block_size;
+
+ PORT_Assert(!obj->encrypt);
+
+ block_size = obj->block_size;
+
+ /*
+ * If this is not a block cipher, then we always have the same
+ * number of output bytes as we had input bytes.
+ */
+ if (block_size == 0)
+ return input_len;
+
+ /*
+ * On the final call, we will always use up all of the pending
+ * bytes plus all of the input bytes, *but*, there will be padding
+ * at the end and we cannot predict how many bytes of padding we
+ * will end up removing. The amount given here is actually known
+ * to be at least 1 byte too long (because we know we will have
+ * at least 1 byte of padding), but seemed clearer/better to me.
+ */
+ if (final)
+ return obj->pending_count + input_len;
+
+ /*
+ * Okay, this amount is exactly what we will output on the
+ * next cipher operation. We will always hang onto the last
+ * 1 - block_size bytes for non-final operations. That is,
+ * we will do as many complete blocks as we can *except* the
+ * last block (complete or partial). (This is because until
+ * we know we are at the end, we cannot know when to interpret
+ * and removing the padding byte(s), which are guaranteed to
+ * be there.)
+ */
+ blocks = (obj->pending_count + input_len - 1) / block_size;
+ return blocks * block_size;
+}
+
+/*
+ * What will be the output length of the next call to encrypt?
+ * Result can be used to perform memory allocations.
+ *
+ * Note that this can return zero, which does not mean that the encrypt
+ * operation can be skipped! (It simply means that there are not enough
+ * bytes to make up an entire block; the bytes will be reserved until
+ * there are enough to encrypt/decrypt at least one block.) However,
+ * if zero is returned it *does* mean that no output buffer need be
+ * passed in to the subsequent encrypt operation, as no output bytes
+ * will be stored.
+ */
+unsigned int
+sec_PKCS7EncryptLength(sec_PKCS7CipherObject *obj, unsigned int input_len,
+ PRBool final)
+{
+ int blocks, block_size;
+ int pad_size;
+
+ PORT_Assert(obj->encrypt);
+
+ block_size = obj->block_size;
+ pad_size = obj->pad_size;
+
+ /*
+ * If this is not a block cipher, then we always have the same
+ * number of output bytes as we had input bytes.
+ */
+ if (block_size == 0)
+ return input_len;
+
+ /*
+ * On the final call, we only send out what we need for
+ * remaining bytes plus the padding. (There is always padding,
+ * so even if we have an exact number of blocks as input, we
+ * will add another full block that is just padding.)
+ */
+ if (final) {
+ if (pad_size == 0) {
+ return obj->pending_count + input_len;
+ } else {
+ blocks = (obj->pending_count + input_len) / pad_size;
+ blocks++;
+ return blocks * pad_size;
+ }
+ }
+
+ /*
+ * Now, count the number of complete blocks of data we have.
+ */
+ blocks = (obj->pending_count + input_len) / block_size;
+
+ return blocks * block_size;
+}
+
+/*
+ * Decrypt a given length of input buffer (starting at "input" and
+ * containing "input_len" bytes), placing the decrypted bytes in
+ * "output" and storing the output length in "*output_len_p".
+ * "obj" is the return value from sec_PKCS7CreateDecryptObject.
+ * When "final" is true, this is the last of the data to be decrypted.
+ *
+ * This is much more complicated than it sounds when the cipher is
+ * a block-type, meaning that the decryption function will only
+ * operate on whole blocks. But our caller is operating stream-wise,
+ * and can pass in any number of bytes. So we need to keep track
+ * of block boundaries. We save excess bytes between calls in "obj".
+ * We also need to determine which bytes are padding, and remove
+ * them from the output. We can only do this step when we know we
+ * have the final block of data. PKCS #7 specifies that the padding
+ * used for a block cipher is a string of bytes, each of whose value is
+ * the same as the length of the padding, and that all data is padded.
+ * (Even data that starts out with an exact multiple of blocks gets
+ * added to it another block, all of which is padding.)
+ */
+SECStatus
+sec_PKCS7Decrypt(sec_PKCS7CipherObject *obj, unsigned char *output,
+ unsigned int *output_len_p, unsigned int max_output_len,
+ const unsigned char *input, unsigned int input_len,
+ PRBool final)
+{
+ unsigned int blocks, bsize, pcount, padsize;
+ unsigned int max_needed, ifraglen, ofraglen, output_len;
+ unsigned char *pbuf;
+ SECStatus rv;
+
+ PORT_Assert(!obj->encrypt);
+
+ /*
+ * Check that we have enough room for the output. Our caller should
+ * already handle this; failure is really an internal error (i.e. bug).
+ */
+ max_needed = sec_PKCS7DecryptLength(obj, input_len, final);
+ PORT_Assert(max_output_len >= max_needed);
+ if (max_output_len < max_needed) {
+ /* PORT_SetError (XXX); */
+ return SECFailure;
+ }
+
+ /*
+ * hardware encryption does not like small decryption sizes here, so we
+ * allow both blocking and padding.
+ */
+ bsize = obj->block_size;
+ padsize = obj->pad_size;
+
+ /*
+ * When no blocking or padding work to do, we can simply call the
+ * cipher function and we are done.
+ */
+ if (bsize == 0) {
+ return (*obj->doit)(obj->cx, output, output_len_p, max_output_len,
+ input, input_len);
+ }
+
+ pcount = obj->pending_count;
+ pbuf = obj->pending_buf;
+
+ output_len = 0;
+
+ if (pcount) {
+ /*
+ * Try to fill in an entire block, starting with the bytes
+ * we already have saved away.
+ */
+ while (input_len && pcount < bsize) {
+ pbuf[pcount++] = *input++;
+ input_len--;
+ }
+ /*
+ * If we have at most a whole block and this is not our last call,
+ * then we are done for now. (We do not try to decrypt a lone
+ * single block because we cannot interpret the padding bytes
+ * until we know we are handling the very last block of all input.)
+ */
+ if (input_len == 0 && !final) {
+ obj->pending_count = pcount;
+ if (output_len_p)
+ *output_len_p = 0;
+ return SECSuccess;
+ }
+ /*
+ * Given the logic above, we expect to have a full block by now.
+ * If we do not, there is something wrong, either with our own
+ * logic or with (length of) the data given to us.
+ */
+ PORT_Assert((padsize == 0) || (pcount % padsize) == 0);
+ if ((padsize != 0) && (pcount % padsize) != 0) {
+ PORT_Assert(final);
+ PORT_SetError(SEC_ERROR_BAD_DATA);
+ return SECFailure;
+ }
+ /*
+ * Decrypt the block.
+ */
+ rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+ pbuf, pcount);
+ if (rv != SECSuccess)
+ return rv;
+
+ /*
+ * For now anyway, all of our ciphers have the same number of
+ * bytes of output as they do input. If this ever becomes untrue,
+ * then sec_PKCS7DecryptLength needs to be made smarter!
+ */
+ PORT_Assert(ofraglen == pcount);
+
+ /*
+ * Account for the bytes now in output.
+ */
+ max_output_len -= ofraglen;
+ output_len += ofraglen;
+ output += ofraglen;
+ }
+
+ /*
+ * If this is our last call, we expect to have an exact number of
+ * blocks left to be decrypted; we will decrypt them all.
+ *
+ * If not our last call, we always save between 1 and bsize bytes
+ * until next time. (We must do this because we cannot be sure
+ * that none of the decrypted bytes are padding bytes until we
+ * have at least another whole block of data. You cannot tell by
+ * looking -- the data could be anything -- you can only tell by
+ * context, knowing you are looking at the last block.) We could
+ * decrypt a whole block now but it is easier if we just treat it
+ * the same way we treat partial block bytes.
+ */
+ if (final) {
+ if (padsize) {
+ blocks = input_len / padsize;
+ ifraglen = blocks * padsize;
+ } else
+ ifraglen = input_len;
+ PORT_Assert(ifraglen == input_len);
+
+ if (ifraglen != input_len) {
+ PORT_SetError(SEC_ERROR_BAD_DATA);
+ return SECFailure;
+ }
+ } else {
+ blocks = (input_len - 1) / bsize;
+ ifraglen = blocks * bsize;
+ PORT_Assert(ifraglen < input_len);
+
+ pcount = input_len - ifraglen;
+ PORT_Memcpy(pbuf, input + ifraglen, pcount);
+ obj->pending_count = pcount;
+ }
+
+ if (ifraglen) {
+ rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+ input, ifraglen);
+ if (rv != SECSuccess)
+ return rv;
+
+ /*
+ * For now anyway, all of our ciphers have the same number of
+ * bytes of output as they do input. If this ever becomes untrue,
+ * then sec_PKCS7DecryptLength needs to be made smarter!
+ */
+ PORT_Assert(ifraglen == ofraglen);
+ if (ifraglen != ofraglen) {
+ PORT_SetError(SEC_ERROR_BAD_DATA);
+ return SECFailure;
+ }
+
+ output_len += ofraglen;
+ } else {
+ ofraglen = 0;
+ }
+
+ /*
+ * If we just did our very last block, "remove" the padding by
+ * adjusting the output length.
+ */
+ if (final && (padsize != 0)) {
+ unsigned int padlen = *(output + ofraglen - 1);
+ if (padlen == 0 || padlen > padsize) {
+ PORT_SetError(SEC_ERROR_BAD_DATA);
+ return SECFailure;
+ }
+ output_len -= padlen;
+ }
+
+ PORT_Assert(output_len_p != NULL || output_len == 0);
+ if (output_len_p != NULL)
+ *output_len_p = output_len;
+
+ return SECSuccess;
+}
+
+/*
+ * Encrypt a given length of input buffer (starting at "input" and
+ * containing "input_len" bytes), placing the encrypted bytes in
+ * "output" and storing the output length in "*output_len_p".
+ * "obj" is the return value from sec_PKCS7CreateEncryptObject.
+ * When "final" is true, this is the last of the data to be encrypted.
+ *
+ * This is much more complicated than it sounds when the cipher is
+ * a block-type, meaning that the encryption function will only
+ * operate on whole blocks. But our caller is operating stream-wise,
+ * and can pass in any number of bytes. So we need to keep track
+ * of block boundaries. We save excess bytes between calls in "obj".
+ * We also need to add padding bytes at the end. PKCS #7 specifies
+ * that the padding used for a block cipher is a string of bytes,
+ * each of whose value is the same as the length of the padding,
+ * and that all data is padded. (Even data that starts out with
+ * an exact multiple of blocks gets added to it another block,
+ * all of which is padding.)
+ *
+ * XXX I would kind of like to combine this with the function above
+ * which does decryption, since they have a lot in common. But the
+ * tricky parts about padding and filling blocks would be much
+ * harder to read that way, so I left them separate. At least for
+ * now until it is clear that they are right.
+ */
+SECStatus
+sec_PKCS7Encrypt(sec_PKCS7CipherObject *obj, unsigned char *output,
+ unsigned int *output_len_p, unsigned int max_output_len,
+ const unsigned char *input, unsigned int input_len,
+ PRBool final)
+{
+ int blocks, bsize, padlen, pcount, padsize;
+ unsigned int max_needed, ifraglen, ofraglen, output_len;
+ unsigned char *pbuf;
+ SECStatus rv;
+
+ PORT_Assert(obj->encrypt);
+
+ /*
+ * Check that we have enough room for the output. Our caller should
+ * already handle this; failure is really an internal error (i.e. bug).
+ */
+ max_needed = sec_PKCS7EncryptLength(obj, input_len, final);
+ PORT_Assert(max_output_len >= max_needed);
+ if (max_output_len < max_needed) {
+ /* PORT_SetError (XXX); */
+ return SECFailure;
+ }
+
+ bsize = obj->block_size;
+ padsize = obj->pad_size;
+
+ /*
+ * When no blocking and padding work to do, we can simply call the
+ * cipher function and we are done.
+ */
+ if (bsize == 0) {
+ return (*obj->doit)(obj->cx, output, output_len_p, max_output_len,
+ input, input_len);
+ }
+
+ pcount = obj->pending_count;
+ pbuf = obj->pending_buf;
+
+ output_len = 0;
+
+ if (pcount) {
+ /*
+ * Try to fill in an entire block, starting with the bytes
+ * we already have saved away.
+ */
+ while (input_len && pcount < bsize) {
+ pbuf[pcount++] = *input++;
+ input_len--;
+ }
+ /*
+ * If we do not have a full block and we know we will be
+ * called again, then we are done for now.
+ */
+ if (pcount < bsize && !final) {
+ obj->pending_count = pcount;
+ if (output_len_p != NULL)
+ *output_len_p = 0;
+ return SECSuccess;
+ }
+ /*
+ * If we have a whole block available, encrypt it.
+ */
+ if ((padsize == 0) || (pcount % padsize) == 0) {
+ rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+ pbuf, pcount);
+ if (rv != SECSuccess)
+ return rv;
+
+ /*
+ * For now anyway, all of our ciphers have the same number of
+ * bytes of output as they do input. If this ever becomes untrue,
+ * then sec_PKCS7EncryptLength needs to be made smarter!
+ */
+ PORT_Assert(ofraglen == pcount);
+
+ /*
+ * Account for the bytes now in output.
+ */
+ max_output_len -= ofraglen;
+ output_len += ofraglen;
+ output += ofraglen;
+
+ pcount = 0;
+ }
+ }
+
+ if (input_len) {
+ PORT_Assert(pcount == 0);
+
+ blocks = input_len / bsize;
+ ifraglen = blocks * bsize;
+
+ if (ifraglen) {
+ rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+ input, ifraglen);
+ if (rv != SECSuccess)
+ return rv;
+
+ /*
+ * For now anyway, all of our ciphers have the same number of
+ * bytes of output as they do input. If this ever becomes untrue,
+ * then sec_PKCS7EncryptLength needs to be made smarter!
+ */
+ PORT_Assert(ifraglen == ofraglen);
+
+ max_output_len -= ofraglen;
+ output_len += ofraglen;
+ output += ofraglen;
+ }
+
+ pcount = input_len - ifraglen;
+ PORT_Assert(pcount < bsize);
+ if (pcount)
+ PORT_Memcpy(pbuf, input + ifraglen, pcount);
+ }
+
+ if (final) {
+ if (padsize) {
+ padlen = padsize - (pcount % padsize);
+ PORT_Memset(pbuf + pcount, padlen, padlen);
+ } else {
+ padlen = 0;
+ }
+ rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+ pbuf, pcount + padlen);
+ if (rv != SECSuccess)
+ return rv;
+
+ /*
+ * For now anyway, all of our ciphers have the same number of
+ * bytes of output as they do input. If this ever becomes untrue,
+ * then sec_PKCS7EncryptLength needs to be made smarter!
+ */
+ PORT_Assert(ofraglen == (pcount + padlen));
+ output_len += ofraglen;
+ } else {
+ obj->pending_count = pcount;
+ }
+
+ PORT_Assert(output_len_p != NULL || output_len == 0);
+ if (output_len_p != NULL)
+ *output_len_p = output_len;
+
+ return SECSuccess;
+}
+
+/*
+ * End of cipher stuff.
+ * -------------------------------------------------------------------
+ */
+
+/*
+ * -------------------------------------------------------------------
+ * XXX The following Attribute stuff really belongs elsewhere.
+ * The Attribute type is *not* part of pkcs7 but rather X.501.
+ * But for now, since PKCS7 is the only customer of attributes,
+ * we define them here. Once there is a use outside of PKCS7,
+ * then change the attribute types and functions from internal
+ * to external naming convention, and move them elsewhere!
+ */
+
+/*
+ * Look through a set of attributes and find one that matches the
+ * specified object ID. If "only" is true, then make sure that
+ * there is not more than one attribute of the same type. Otherwise,
+ * just return the first one found. (XXX Does anybody really want
+ * that first-found behavior? It was like that when I found it...)
+ */
+SEC_PKCS7Attribute *
+sec_PKCS7FindAttribute(SEC_PKCS7Attribute **attrs, SECOidTag oidtag,
+ PRBool only)
+{
+ SECOidData *oid;
+ SEC_PKCS7Attribute *attr1, *attr2;
+
+ if (attrs == NULL)
+ return NULL;
+
+ oid = SECOID_FindOIDByTag(oidtag);
+ if (oid == NULL)
+ return NULL;
+
+ while ((attr1 = *attrs++) != NULL) {
+ if (attr1->type.len == oid->oid.len && PORT_Memcmp(attr1->type.data, oid->oid.data, oid->oid.len) == 0)
+ break;
+ }
+
+ if (attr1 == NULL)
+ return NULL;
+
+ if (!only)
+ return attr1;
+
+ while ((attr2 = *attrs++) != NULL) {
+ if (attr2->type.len == oid->oid.len && PORT_Memcmp(attr2->type.data, oid->oid.data, oid->oid.len) == 0)
+ break;
+ }
+
+ if (attr2 != NULL)
+ return NULL;
+
+ return attr1;
+}
+
+/*
+ * Return the single attribute value, doing some sanity checking first:
+ * - Multiple values are *not* expected.
+ * - Empty values are *not* expected.
+ */
+SECItem *
+sec_PKCS7AttributeValue(SEC_PKCS7Attribute *attr)
+{
+ SECItem *value;
+
+ if (attr == NULL)
+ return NULL;
+
+ value = attr->values[0];
+
+ if (value == NULL || value->data == NULL || value->len == 0)
+ return NULL;
+
+ if (attr->values[1] != NULL)
+ return NULL;
+
+ return value;
+}
+
+static const SEC_ASN1Template *
+sec_attr_choose_attr_value_template(void *src_or_dest, PRBool encoding)
+{
+ const SEC_ASN1Template *theTemplate;
+
+ SEC_PKCS7Attribute *attribute;
+ SECOidData *oiddata;
+ PRBool encoded;
+
+ PORT_Assert(src_or_dest != NULL);
+ if (src_or_dest == NULL)
+ return NULL;
+
+ attribute = (SEC_PKCS7Attribute *)src_or_dest;
+
+ if (encoding && attribute->encoded)
+ return SEC_ASN1_GET(SEC_AnyTemplate);
+
+ oiddata = attribute->typeTag;
+ if (oiddata == NULL) {
+ oiddata = SECOID_FindOID(&attribute->type);
+ attribute->typeTag = oiddata;
+ }
+
+ if (oiddata == NULL) {
+ encoded = PR_TRUE;
+ theTemplate = SEC_ASN1_GET(SEC_AnyTemplate);
+ } else {
+ switch (oiddata->offset) {
+ default:
+ encoded = PR_TRUE;
+ theTemplate = SEC_ASN1_GET(SEC_AnyTemplate);
+ break;
+ case SEC_OID_PKCS9_EMAIL_ADDRESS:
+ case SEC_OID_RFC1274_MAIL:
+ case SEC_OID_PKCS9_UNSTRUCTURED_NAME:
+ encoded = PR_FALSE;
+ theTemplate = SEC_ASN1_GET(SEC_IA5StringTemplate);
+ break;
+ case SEC_OID_PKCS9_CONTENT_TYPE:
+ encoded = PR_FALSE;
+ theTemplate = SEC_ASN1_GET(SEC_ObjectIDTemplate);
+ break;
+ case SEC_OID_PKCS9_MESSAGE_DIGEST:
+ encoded = PR_FALSE;
+ theTemplate = SEC_ASN1_GET(SEC_OctetStringTemplate);
+ break;
+ case SEC_OID_PKCS9_SIGNING_TIME:
+ encoded = PR_FALSE;
+ theTemplate = SEC_ASN1_GET(CERT_TimeChoiceTemplate);
+ break;
+ /* XXX Want other types here, too */
+ }
+ }
+
+ if (encoding) {
+ /*
+ * If we are encoding and we think we have an already-encoded value,
+ * then the code which initialized this attribute should have set
+ * the "encoded" property to true (and we would have returned early,
+ * up above). No devastating error, but that code should be fixed.
+ * (It could indicate that the resulting encoded bytes are wrong.)
+ */
+ PORT_Assert(!encoded);
+ } else {
+ /*
+ * We are decoding; record whether the resulting value is
+ * still encoded or not.
+ */
+ attribute->encoded = encoded;
+ }
+ return theTemplate;
+}
+
+static const SEC_ASN1TemplateChooserPtr sec_attr_chooser = sec_attr_choose_attr_value_template;
+
+static const SEC_ASN1Template sec_pkcs7_attribute_template[] = {
+ { SEC_ASN1_SEQUENCE,
+ 0, NULL, sizeof(SEC_PKCS7Attribute) },
+ { SEC_ASN1_OBJECT_ID,
+ offsetof(SEC_PKCS7Attribute, type) },
+ { SEC_ASN1_DYNAMIC | SEC_ASN1_SET_OF,
+ offsetof(SEC_PKCS7Attribute, values),
+ &sec_attr_chooser },
+ { 0 }
+};
+
+static const SEC_ASN1Template sec_pkcs7_set_of_attribute_template[] = {
+ { SEC_ASN1_SET_OF, 0, sec_pkcs7_attribute_template },
+};
+
+/*
+ * If you are wondering why this routine does not reorder the attributes
+ * first, and might be tempted to make it do so, see the comment by the
+ * call to ReorderAttributes in p7encode.c. (Or, see who else calls this
+ * and think long and hard about the implications of making it always
+ * do the reordering.)
+ */
+SECItem *
+sec_PKCS7EncodeAttributes(PLArenaPool *poolp, SECItem *dest, void *src)
+{
+ return SEC_ASN1EncodeItem(poolp, dest, src,
+ sec_pkcs7_set_of_attribute_template);
+}
+
+/*
+ * Make sure that the order of the attributes guarantees valid DER
+ * (which must be in lexigraphically ascending order for a SET OF);
+ * if reordering is necessary it will be done in place (in attrs).
+ */
+SECStatus
+sec_PKCS7ReorderAttributes(SEC_PKCS7Attribute **attrs)
+{
+ PLArenaPool *poolp;
+ int num_attrs, i, pass, besti;
+ unsigned int j;
+ SECItem **enc_attrs;
+ SEC_PKCS7Attribute **new_attrs;
+
+ /*
+ * I think we should not be called with NULL. But if we are,
+ * call it a success anyway, because the order *is* okay.
+ */
+ PORT_Assert(attrs != NULL);
+ if (attrs == NULL)
+ return SECSuccess;
+
+ /*
+ * Count how many attributes we are dealing with here.
+ */
+ num_attrs = 0;
+ while (attrs[num_attrs] != NULL)
+ num_attrs++;
+
+ /*
+ * Again, I think we should have some attributes here.
+ * But if we do not, or if there is only one, then call it
+ * a success because it also already has a fine order.
+ */
+ PORT_Assert(num_attrs);
+ if (num_attrs == 0 || num_attrs == 1)
+ return SECSuccess;
+
+ /*
+ * Allocate an arena for us to work with, so it is easy to
+ * clean up all of the memory (fairly small pieces, really).
+ */
+ poolp = PORT_NewArena(1024); /* XXX what is right value? */
+ if (poolp == NULL)
+ return SECFailure; /* no memory; nothing we can do... */
+
+ /*
+ * Allocate arrays to hold the individual encodings which we will use
+ * for comparisons and the reordered attributes as they are sorted.
+ */
+ enc_attrs = (SECItem **)PORT_ArenaZAlloc(poolp, num_attrs * sizeof(SECItem *));
+ new_attrs = (SEC_PKCS7Attribute **)PORT_ArenaZAlloc(poolp,
+ num_attrs * sizeof(SEC_PKCS7Attribute *));
+ if (enc_attrs == NULL || new_attrs == NULL) {
+ PORT_FreeArena(poolp, PR_FALSE);
+ return SECFailure;
+ }
+
+ /*
+ * DER encode each individual attribute.
+ */
+ for (i = 0; i < num_attrs; i++) {
+ enc_attrs[i] = SEC_ASN1EncodeItem(poolp, NULL, attrs[i],
+ sec_pkcs7_attribute_template);
+ if (enc_attrs[i] == NULL) {
+ PORT_FreeArena(poolp, PR_FALSE);
+ return SECFailure;
+ }
+ }
+
+ /*
+ * Now compare and sort them; this is not the most efficient sorting
+ * method, but it is just fine for the problem at hand, because the
+ * number of attributes is (always) going to be small.
+ */
+ for (pass = 0; pass < num_attrs; pass++) {
+ /*
+ * Find the first not-yet-accepted attribute. (Once one is
+ * sorted into the other array, it is cleared from enc_attrs.)
+ */
+ for (i = 0; i < num_attrs; i++) {
+ if (enc_attrs[i] != NULL)
+ break;
+ }
+ PORT_Assert(i < num_attrs);
+ besti = i;
+
+ /*
+ * Find the lowest (lexigraphically) encoding. One that is
+ * shorter than all the rest is known to be "less" because each
+ * attribute is of the same type (a SEQUENCE) and so thus the
+ * first octet of each is the same, and the second octet is
+ * the length (or the length of the length with the high bit
+ * set, followed by the length, which also works out to always
+ * order the shorter first). Two (or more) that have the
+ * same length need to be compared byte by byte until a mismatch
+ * is found.
+ */
+ for (i = besti + 1; i < num_attrs; i++) {
+ if (enc_attrs[i] == NULL) /* slot already handled */
+ continue;
+
+ if (enc_attrs[i]->len != enc_attrs[besti]->len) {
+ if (enc_attrs[i]->len < enc_attrs[besti]->len)
+ besti = i;
+ continue;
+ }
+
+ for (j = 0; j < enc_attrs[i]->len; j++) {
+ if (enc_attrs[i]->data[j] < enc_attrs[besti]->data[j]) {
+ besti = i;
+ break;
+ }
+ }
+
+ /*
+ * For this not to be true, we would have to have encountered
+ * two *identical* attributes, which I think we should not see.
+ * So assert if it happens, but even if it does, let it go
+ * through; the ordering of the two does not matter.
+ */
+ PORT_Assert(j < enc_attrs[i]->len);
+ }
+
+ /*
+ * Now we have found the next-lowest one; copy it over and
+ * remove it from enc_attrs.
+ */
+ new_attrs[pass] = attrs[besti];
+ enc_attrs[besti] = NULL;
+ }
+
+ /*
+ * Now new_attrs has the attributes in the order we want;
+ * copy them back into the attrs array we started with.
+ */
+ for (i = 0; i < num_attrs; i++)
+ attrs[i] = new_attrs[i];
+
+ PORT_FreeArena(poolp, PR_FALSE);
+ return SECSuccess;
+}
+
+/*
+ * End of attribute stuff.
+ * -------------------------------------------------------------------
+ */
+
+/*
+ * Templates and stuff. Keep these at the end of the file.
+ */
+
+/* forward declaration */
+static const SEC_ASN1Template *
+sec_pkcs7_choose_content_template(void *src_or_dest, PRBool encoding);
+
+static const SEC_ASN1TemplateChooserPtr sec_pkcs7_chooser = sec_pkcs7_choose_content_template;
+
+const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7ContentInfo) },
+ { SEC_ASN1_OBJECT_ID,
+ offsetof(SEC_PKCS7ContentInfo, contentType) },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_DYNAMIC | SEC_ASN1_MAY_STREAM | SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
+ offsetof(SEC_PKCS7ContentInfo, content),
+ &sec_pkcs7_chooser },
+ { 0 }
+};
+
+/* XXX These names should change from external to internal convention. */
+
+static const SEC_ASN1Template SEC_PKCS7SignerInfoTemplate[] = {
+ { SEC_ASN1_SEQUENCE,
+ 0, NULL, sizeof(SEC_PKCS7SignerInfo) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7SignerInfo, version) },
+ { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7SignerInfo, issuerAndSN),
+ SEC_ASN1_SUB(CERT_IssuerAndSNTemplate) },
+ { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7SignerInfo, digestAlg),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
+ offsetof(SEC_PKCS7SignerInfo, authAttr),
+ sec_pkcs7_set_of_attribute_template },
+ { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7SignerInfo, digestEncAlg),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_OCTET_STRING,
+ offsetof(SEC_PKCS7SignerInfo, encDigest) },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
+ offsetof(SEC_PKCS7SignerInfo, unAuthAttr),
+ sec_pkcs7_set_of_attribute_template },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PKCS7SignedDataTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7SignedData) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7SignedData, version) },
+ { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7SignedData, digestAlgorithms),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_INLINE,
+ offsetof(SEC_PKCS7SignedData, contentInfo),
+ sec_PKCS7ContentInfoTemplate },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+ SEC_ASN1_XTRN | 0,
+ offsetof(SEC_PKCS7SignedData, rawCerts),
+ SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+ SEC_ASN1_XTRN | 1,
+ offsetof(SEC_PKCS7SignedData, crls),
+ SEC_ASN1_SUB(CERT_SetOfSignedCrlTemplate) },
+ { SEC_ASN1_SET_OF,
+ offsetof(SEC_PKCS7SignedData, signerInfos),
+ SEC_PKCS7SignerInfoTemplate },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7SignedDataTemplate[] = {
+ { SEC_ASN1_POINTER, 0, SEC_PKCS7SignedDataTemplate }
+};
+
+static const SEC_ASN1Template SEC_PKCS7RecipientInfoTemplate[] = {
+ { SEC_ASN1_SEQUENCE,
+ 0, NULL, sizeof(SEC_PKCS7RecipientInfo) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7RecipientInfo, version) },
+ { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7RecipientInfo, issuerAndSN),
+ SEC_ASN1_SUB(CERT_IssuerAndSNTemplate) },
+ { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7RecipientInfo, keyEncAlg),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_OCTET_STRING,
+ offsetof(SEC_PKCS7RecipientInfo, encKey) },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PKCS7EncryptedContentInfoTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7EncryptedContentInfo) },
+ { SEC_ASN1_OBJECT_ID,
+ offsetof(SEC_PKCS7EncryptedContentInfo, contentType) },
+ { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7EncryptedContentInfo, contentEncAlg),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_MAY_STREAM | SEC_ASN1_CONTEXT_SPECIFIC |
+ SEC_ASN1_XTRN | 0,
+ offsetof(SEC_PKCS7EncryptedContentInfo, encContent),
+ SEC_ASN1_SUB(SEC_OctetStringTemplate) },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PKCS7EnvelopedDataTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7EnvelopedData) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7EnvelopedData, version) },
+ { SEC_ASN1_SET_OF,
+ offsetof(SEC_PKCS7EnvelopedData, recipientInfos),
+ SEC_PKCS7RecipientInfoTemplate },
+ { SEC_ASN1_INLINE,
+ offsetof(SEC_PKCS7EnvelopedData, encContentInfo),
+ SEC_PKCS7EncryptedContentInfoTemplate },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7EnvelopedDataTemplate[] = {
+ { SEC_ASN1_POINTER, 0, SEC_PKCS7EnvelopedDataTemplate }
+};
+
+static const SEC_ASN1Template SEC_PKCS7SignedAndEnvelopedDataTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7SignedAndEnvelopedData) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, version) },
+ { SEC_ASN1_SET_OF,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, recipientInfos),
+ SEC_PKCS7RecipientInfoTemplate },
+ { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, digestAlgorithms),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_INLINE,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, encContentInfo),
+ SEC_PKCS7EncryptedContentInfoTemplate },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+ SEC_ASN1_XTRN | 0,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, rawCerts),
+ SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+ SEC_ASN1_XTRN | 1,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, crls),
+ SEC_ASN1_SUB(CERT_SetOfSignedCrlTemplate) },
+ { SEC_ASN1_SET_OF,
+ offsetof(SEC_PKCS7SignedAndEnvelopedData, signerInfos),
+ SEC_PKCS7SignerInfoTemplate },
+ { 0 }
+};
+
+static const SEC_ASN1Template
+ SEC_PointerToPKCS7SignedAndEnvelopedDataTemplate[] = {
+ { SEC_ASN1_POINTER, 0, SEC_PKCS7SignedAndEnvelopedDataTemplate }
+ };
+
+static const SEC_ASN1Template SEC_PKCS7DigestedDataTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7DigestedData) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7DigestedData, version) },
+ { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+ offsetof(SEC_PKCS7DigestedData, digestAlg),
+ SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+ { SEC_ASN1_INLINE,
+ offsetof(SEC_PKCS7DigestedData, contentInfo),
+ sec_PKCS7ContentInfoTemplate },
+ { SEC_ASN1_OCTET_STRING,
+ offsetof(SEC_PKCS7DigestedData, digest) },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7DigestedDataTemplate[] = {
+ { SEC_ASN1_POINTER, 0, SEC_PKCS7DigestedDataTemplate }
+};
+
+static const SEC_ASN1Template SEC_PKCS7EncryptedDataTemplate[] = {
+ { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+ 0, NULL, sizeof(SEC_PKCS7EncryptedData) },
+ { SEC_ASN1_INTEGER,
+ offsetof(SEC_PKCS7EncryptedData, version) },
+ { SEC_ASN1_INLINE,
+ offsetof(SEC_PKCS7EncryptedData, encContentInfo),
+ SEC_PKCS7EncryptedContentInfoTemplate },
+ { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7EncryptedDataTemplate[] = {
+ { SEC_ASN1_POINTER, 0, SEC_PKCS7EncryptedDataTemplate }
+};
+
+static const SEC_ASN1Template *
+sec_pkcs7_choose_content_template(void *src_or_dest, PRBool encoding)
+{
+ const SEC_ASN1Template *theTemplate;
+ SEC_PKCS7ContentInfo *cinfo;
+ SECOidTag kind;
+
+ PORT_Assert(src_or_dest != NULL);
+ if (src_or_dest == NULL)
+ return NULL;
+
+ cinfo = (SEC_PKCS7ContentInfo *)src_or_dest;
+ kind = SEC_PKCS7ContentType(cinfo);
+ switch (kind) {
+ default:
+ theTemplate = SEC_ASN1_GET(SEC_PointerToAnyTemplate);
+ break;
+ case SEC_OID_PKCS7_DATA:
+ theTemplate = SEC_ASN1_GET(SEC_PointerToOctetStringTemplate);
+ break;
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ theTemplate = SEC_PointerToPKCS7SignedDataTemplate;
+ break;
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ theTemplate = SEC_PointerToPKCS7EnvelopedDataTemplate;
+ break;
+ case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+ theTemplate = SEC_PointerToPKCS7SignedAndEnvelopedDataTemplate;
+ break;
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+ theTemplate = SEC_PointerToPKCS7DigestedDataTemplate;
+ break;
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ theTemplate = SEC_PointerToPKCS7EncryptedDataTemplate;
+ break;
+ }
+ return theTemplate;
+}
+
+/*
+ * End of templates. Do not add stuff after this; put new code
+ * up above the start of the template definitions.
+ */