The Tor Browser: security/nss/lib/pkcs7/secpkcs7.h@7e26c7da4463 (annotated)

security/nss/lib/pkcs7/secpkcs7.h@7e26c7da4463 (annotated)

security/nss/lib/pkcs7/secpkcs7.h

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /* 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/. */
 /*
  * Interface to the PKCS7 implementation.
  */
 #ifndef _SECPKCS7_H_
 #define _SECPKCS7_H_
 #include "seccomon.h"
 #include "secoidt.h"
 #include "certt.h"
 #include "keyt.h"
 #include "hasht.h"
 #include "pkcs7t.h"
 extern const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[];
 /************************************************************************/
 SEC_BEGIN_PROTOS
 /************************************************************************
  *	Miscellaneous
  ************************************************************************/
 /*
  * Returns the content type of the given contentInfo.
  */
 extern SECOidTag SEC_PKCS7ContentType (SEC_PKCS7ContentInfo *cinfo);
 /*
  * Destroy a PKCS7 contentInfo and all of its sub-pieces.
  */
 extern void SEC_PKCS7DestroyContentInfo(SEC_PKCS7ContentInfo *contentInfo);
 /*
  * Copy a PKCS7 contentInfo.  A Destroy is needed on *each* copy.
  */
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7CopyContentInfo(SEC_PKCS7ContentInfo *contentInfo);
 /*
  * Return a pointer to the actual content.  In the case of those types
  * which are encrypted, this returns the *plain* content.
  */
 extern SECItem *SEC_PKCS7GetContent(SEC_PKCS7ContentInfo *cinfo);
 /************************************************************************
  *	PKCS7 Decoding, Verification, etc..
  ************************************************************************/
 extern SEC_PKCS7DecoderContext *
 SEC_PKCS7DecoderStart(SEC_PKCS7DecoderContentCallback callback,
 		      void *callback_arg,
 		      SECKEYGetPasswordKey pwfn, void *pwfn_arg,
 		      SEC_PKCS7GetDecryptKeyCallback decrypt_key_cb,
 		      void *decrypt_key_cb_arg,
 		      SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb);
 extern SECStatus
 SEC_PKCS7DecoderUpdate(SEC_PKCS7DecoderContext *p7dcx,
 		       const char *buf, unsigned long len);
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7DecoderFinish(SEC_PKCS7DecoderContext *p7dcx);
 /*  Abort the underlying ASN.1 stream & set an error  */
 void SEC_PKCS7DecoderAbort(SEC_PKCS7DecoderContext *p7dcx, int error);
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7DecodeItem(SECItem *p7item,
 		    SEC_PKCS7DecoderContentCallback cb, void *cb_arg,
 		    SECKEYGetPasswordKey pwfn, void *pwfn_arg,
 		    SEC_PKCS7GetDecryptKeyCallback decrypt_key_cb,
 		    void *decrypt_key_cb_arg,
 		    SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb);
 extern PRBool SEC_PKCS7ContainsCertsOrCrls(SEC_PKCS7ContentInfo *cinfo);
 /* checks to see if the contents of the content info is
  * empty.  it so, PR_TRUE is returned.  PR_FALSE, otherwise.
  *
  * minLen is used to specify a minimum size.  if content size <= minLen,
  * content is assumed empty.
  */
 extern PRBool
 SEC_PKCS7IsContentEmpty(SEC_PKCS7ContentInfo *cinfo, unsigned int minLen);
 extern PRBool SEC_PKCS7ContentIsEncrypted(SEC_PKCS7ContentInfo *cinfo);
 /*
  * If the PKCS7 content has a signature (not just *could* have a signature)
  * return true; false otherwise.  This can/should be called before calling
  * VerifySignature, which will always indicate failure if no signature is
  * present, but that does not mean there even was a signature!
  * Note that the content itself can be empty (detached content was sent
  * another way); it is the presence of the signature that matters.
  */
 extern PRBool SEC_PKCS7ContentIsSigned(SEC_PKCS7ContentInfo *cinfo);
 /*
  * SEC_PKCS7VerifySignature
  *	Look at a PKCS7 contentInfo and check if the signature is good.
  *	The verification checks that the signing cert is valid and trusted
  *	for the purpose specified by "certusage".
  *
  *	In addition, if "keepcerts" is true, add any new certificates found
  *	into our local database.
  */
 extern PRBool SEC_PKCS7VerifySignature(SEC_PKCS7ContentInfo *cinfo,
 				       SECCertUsage certusage,
 				       PRBool keepcerts);
 /*
  * SEC_PKCS7VerifyDetachedSignature
  *	Look at a PKCS7 contentInfo and check if the signature matches
  *	a passed-in digest (calculated, supposedly, from detached contents).
  *	The verification checks that the signing cert is valid and trusted
  *	for the purpose specified by "certusage".
  *
  *	In addition, if "keepcerts" is true, add any new certificates found
  *	into our local database.
  */
 extern PRBool SEC_PKCS7VerifyDetachedSignature(SEC_PKCS7ContentInfo *cinfo,
 					       SECCertUsage certusage,
 					       const SECItem *detached_digest,
 					       HASH_HashType digest_type,
 					       PRBool keepcerts);
 /*
  * SEC_PKCS7VerifyDetachedSignatureAtTime
  *      Look at a PKCS7 contentInfo and check if the signature matches
  *      a passed-in digest (calculated, supposedly, from detached contents).
  *      The verification checks that the signing cert is valid and trusted
  *      for the purpose specified by "certusage" at time "atTime".
  *
  *	In addition, if "keepcerts" is true, add any new certificates found
  *	into our local database.
  */
 extern PRBool
 SEC_PKCS7VerifyDetachedSignatureAtTime(SEC_PKCS7ContentInfo *cinfo,
 				       SECCertUsage certusage,
 				       const SECItem *detached_digest,
 				       HASH_HashType digest_type,
 				       PRBool keepcerts,
 				       PRTime atTime);
 /*
  * SEC_PKCS7GetSignerCommonName, SEC_PKCS7GetSignerEmailAddress
  *      The passed-in contentInfo is espected to be Signed, and these
  *      functions return the specified portion of the full signer name.
  *
  *      Returns a pointer to allocated memory, which must be freed.
  *      A NULL return value is an error.
  */
 extern char *SEC_PKCS7GetSignerCommonName(SEC_PKCS7ContentInfo *cinfo);
 extern char *SEC_PKCS7GetSignerEmailAddress(SEC_PKCS7ContentInfo *cinfo);
 /*
  * Return the the signing time, in UTCTime format, of a PKCS7 contentInfo.
  */
 extern SECItem *SEC_PKCS7GetSigningTime(SEC_PKCS7ContentInfo *cinfo);
 /************************************************************************
  *	PKCS7 Creation and Encoding.
  ************************************************************************/
 /*
  * Start a PKCS7 signing context.
  *
  * "cert" is the cert that will be used to sign the data.  It will be
  * checked for validity.
  *
  * "certusage" describes the signing usage (e.g. certUsageEmailSigner)
  * XXX Maybe SECCertUsage should be split so that our caller just says
  * "email" and *we* add the "signing" part -- otherwise our caller
  * could be lying about the usage; we do not want to allow encryption
  * certs for signing or vice versa.
  *
  * "certdb" is the cert database to use for verifying the cert.
  * It can be NULL if a default database is available (like in the client).
  *
  * "digestalg" names the digest algorithm (e.g. SEC_OID_SHA1).
  *
  * "digest" is the actual digest of the data.  It must be provided in
  * the case of detached data or NULL if the content will be included.
  *
  * The return value can be passed to functions which add things to
  * it like attributes, then eventually to SEC_PKCS7Encode() or to
  * SEC_PKCS7EncoderStart() to create the encoded data, and finally to
  * SEC_PKCS7DestroyContentInfo().
  *
  * An error results in a return value of NULL and an error set.
  * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
  */
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7CreateSignedData (CERTCertificate *cert,
 			   SECCertUsage certusage,
 			   CERTCertDBHandle *certdb,
 			   SECOidTag digestalg,
 			   SECItem *digest,
 		           SECKEYGetPasswordKey pwfn, void *pwfn_arg);
 /*
  * Create a PKCS7 certs-only container.
  *
  * "cert" is the (first) cert that will be included.
  *
  * "include_chain" specifies whether the entire chain for "cert" should
  * be included.
  *
  * "certdb" is the cert database to use for finding the chain.
  * It can be NULL in when "include_chain" is false, or when meaning
  * use the default database.
  *
  * More certs and chains can be added via AddCertficate and AddCertChain.
  *
  * An error results in a return value of NULL and an error set.
  * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
  */
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7CreateCertsOnly (CERTCertificate *cert,
 			  PRBool include_chain,
 			  CERTCertDBHandle *certdb);
 /*
  * Start a PKCS7 enveloping context.
  *
  * "cert" is the cert for the recipient.  It will be checked for validity.
  *
  * "certusage" describes the encryption usage (e.g. certUsageEmailRecipient)
  * XXX Maybe SECCertUsage should be split so that our caller just says
  * "email" and *we* add the "recipient" part -- otherwise our caller
  * could be lying about the usage; we do not want to allow encryption
  * certs for signing or vice versa.
  *
  * "certdb" is the cert database to use for verifying the cert.
  * It can be NULL if a default database is available (like in the client).
  *
  * "encalg" specifies the bulk encryption algorithm to use (e.g. SEC_OID_RC2).
  *
  * "keysize" specifies the bulk encryption key size, in bits.
  *
  * The return value can be passed to functions which add things to
  * it like more recipients, then eventually to SEC_PKCS7Encode() or to
  * SEC_PKCS7EncoderStart() to create the encoded data, and finally to
  * SEC_PKCS7DestroyContentInfo().
  *
  * An error results in a return value of NULL and an error set.
  * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
  */
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7CreateEnvelopedData (CERTCertificate *cert,
 			      SECCertUsage certusage,
 			      CERTCertDBHandle *certdb,
 			      SECOidTag encalg,
 			      int keysize,
 		              SECKEYGetPasswordKey pwfn, void *pwfn_arg);
 /*
  * XXX There will be a similar routine for creating signedAndEnvelopedData.
  * But its parameters will be different and I have no plans to implement
  * it any time soon because we have no current need for it.
  */
 /*
  * Create an empty PKCS7 data content info.
  *
  * An error results in a return value of NULL and an error set.
  * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
  */
 extern SEC_PKCS7ContentInfo *SEC_PKCS7CreateData (void);
 /*
  * Create an empty PKCS7 encrypted content info.
  *
  * "algorithm" specifies the bulk encryption algorithm to use.
  *
  * An error results in a return value of NULL and an error set.
  * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
  */
 extern SEC_PKCS7ContentInfo *
 SEC_PKCS7CreateEncryptedData (SECOidTag algorithm, int keysize,
 			      SECKEYGetPasswordKey pwfn, void *pwfn_arg);
 /*
  * All of the following things return SECStatus to signal success or failure.
  * Failure should have a more specific error status available via
  * PORT_GetError()/XP_GetError().
  */
 /*
  * Add the specified attribute to the authenticated (i.e. signed) attributes
  * of "cinfo" -- "oidtag" describes the attribute and "value" is the
  * value to be associated with it.  NOTE! "value" must already be encoded;
  * no interpretation of "oidtag" is done.  Also, it is assumed that this
  * signedData has only one signer -- if we ever need to add attributes
  * when there is more than one signature, we need a way to specify *which*
  * signature should get the attribute.
  *
  * XXX Technically, a signed attribute can have multiple values; if/when
  * we ever need to support an attribute which takes multiple values, we
  * either need to change this interface or create an AddSignedAttributeValue
  * which can be called subsequently, and would then append a value.
  *
  * "cinfo" should be of type signedData (the only kind of pkcs7 data
  * that is allowed authenticated attributes); SECFailure will be returned
  * if it is not.
  */
 extern SECStatus SEC_PKCS7AddSignedAttribute (SEC_PKCS7ContentInfo *cinfo,
 					      SECOidTag oidtag,
 					      SECItem *value);
 /*
  * Add "cert" and its entire chain to the set of certs included in "cinfo".
  *
  * "certdb" is the cert database to use for finding the chain.
  * It can be NULL, meaning use the default database.
  *
  * "cinfo" should be of type signedData or signedAndEnvelopedData;
  * SECFailure will be returned if it is not.
  */
 extern SECStatus SEC_PKCS7AddCertChain (SEC_PKCS7ContentInfo *cinfo,
 					CERTCertificate *cert,
 					CERTCertDBHandle *certdb);
 /*
  * Add "cert" to the set of certs included in "cinfo".
  *
  * "cinfo" should be of type signedData or signedAndEnvelopedData;
  * SECFailure will be returned if it is not.
  */
 extern SECStatus SEC_PKCS7AddCertificate (SEC_PKCS7ContentInfo *cinfo,
 					  CERTCertificate *cert);
 /*
  * Add another recipient to an encrypted message.
  *
  * "cinfo" should be of type envelopedData or signedAndEnvelopedData;
  * SECFailure will be returned if it is not.
  *
  * "cert" is the cert for the recipient.  It will be checked for validity.
  *
  * "certusage" describes the encryption usage (e.g. certUsageEmailRecipient)
  * XXX Maybe SECCertUsage should be split so that our caller just says
  * "email" and *we* add the "recipient" part -- otherwise our caller
  * could be lying about the usage; we do not want to allow encryption
  * certs for signing or vice versa.
  *
  * "certdb" is the cert database to use for verifying the cert.
  * It can be NULL if a default database is available (like in the client).
  */
 extern SECStatus SEC_PKCS7AddRecipient (SEC_PKCS7ContentInfo *cinfo,
 					CERTCertificate *cert,
 					SECCertUsage certusage,
 					CERTCertDBHandle *certdb);
 /*
  * Add the signing time to the authenticated (i.e. signed) attributes
  * of "cinfo".  This is expected to be included in outgoing signed
  * messages for email (S/MIME) but is likely useful in other situations.
  *
  * This should only be added once; a second call will either do
  * nothing or replace an old signing time with a newer one.
  *
  * XXX This will probably just shove the current time into "cinfo"
  * but it will not actually get signed until the entire item is
  * processed for encoding.  Is this (expected to be small) delay okay?
  *
  * "cinfo" should be of type signedData (the only kind of pkcs7 data
  * that is allowed authenticated attributes); SECFailure will be returned
  * if it is not.
  */
 extern SECStatus SEC_PKCS7AddSigningTime (SEC_PKCS7ContentInfo *cinfo);
 /*
  * Add the signer's symmetric capabilities to the authenticated
  * (i.e. signed) attributes of "cinfo".  This is expected to be
  * included in outgoing signed messages for email (S/MIME).
  *
  * This can only be added once; a second call will return SECFailure.
  *
  * "cinfo" should be of type signedData or signedAndEnvelopedData;
  * SECFailure will be returned if it is not.
  */
 extern SECStatus SEC_PKCS7AddSymmetricCapabilities(SEC_PKCS7ContentInfo *cinfo);
 /*
  * Mark that the signer's certificate and its issuing chain should
  * be included in the encoded data.  This is expected to be used
  * in outgoing signed messages for email (S/MIME).
  *
  * "certdb" is the cert database to use for finding the chain.
  * It can be NULL, meaning use the default database.
  *
  * "cinfo" should be of type signedData or signedAndEnvelopedData;
  * SECFailure will be returned if it is not.
  */
 extern SECStatus SEC_PKCS7IncludeCertChain (SEC_PKCS7ContentInfo *cinfo,
 					    CERTCertDBHandle *certdb);
 /*
  * Set the content; it will be included and also hashed and/or encrypted
  * as appropriate.  This is for in-memory content (expected to be "small")
  * that will be included in the PKCS7 object.  All others should stream the
  * content through when encoding (see SEC_PKCS7Encoder{Start,Update,Finish}).
  *
  * "buf" points to data of length "len"; it will be copied.
  */
 extern SECStatus SEC_PKCS7SetContent (SEC_PKCS7ContentInfo *cinfo,
 				      const char *buf, unsigned long len);
 /*
  * Encode a PKCS7 object, in one shot.  All necessary components
  * of the object must already be specified.  Either the data has
  * already been included (via SetContent), or the data is detached,
  * or there is no data at all (certs-only).
  *
  * "cinfo" specifies the object to be encoded.
  *
  * "outputfn" is where the encoded bytes will be passed.
  *
  * "outputarg" is an opaque argument to the above callback.
  *
  * "bulkkey" specifies the bulk encryption key to use.   This argument
  * can be NULL if no encryption is being done, or if the bulk key should
  * be generated internally (usually the case for EnvelopedData but never
  * for EncryptedData, which *must* provide a bulk encryption key).
  *
  * "pwfn" is a callback for getting the password which protects the
  * private key of the signer.  This argument can be NULL if it is known
  * that no signing is going to be done.
  *
  * "pwfnarg" is an opaque argument to the above callback.
  */
 extern SECStatus SEC_PKCS7Encode (SEC_PKCS7ContentInfo *cinfo,
 				  SEC_PKCS7EncoderOutputCallback outputfn,
 				  void *outputarg,
 				  PK11SymKey *bulkkey,
 				  SECKEYGetPasswordKey pwfn,
 				  void *pwfnarg);
 /*
  * Encode a PKCS7 object, in one shot.  All necessary components
  * of the object must already be specified.  Either the data has
  * already been included (via SetContent), or the data is detached,
  * or there is no data at all (certs-only).  The output, rather than
  * being passed to an output function as is done above, is all put
  * into a SECItem.
  *
  * "pool" specifies a pool from which to allocate the result.
  * It can be NULL, in which case memory is allocated generically.
  *
  * "dest" specifies a SECItem in which to put the result data.
  * It can be NULL, in which case the entire item is allocated, too.
  *
  * "cinfo" specifies the object to be encoded.
  *
  * "bulkkey" specifies the bulk encryption key to use.   This argument
  * can be NULL if no encryption is being done, or if the bulk key should
  * be generated internally (usually the case for EnvelopedData but never
  * for EncryptedData, which *must* provide a bulk encryption key).
  *
  * "pwfn" is a callback for getting the password which protects the
  * private key of the signer.  This argument can be NULL if it is known
  * that no signing is going to be done.
  *
  * "pwfnarg" is an opaque argument to the above callback.
  */
 extern SECItem *SEC_PKCS7EncodeItem (PLArenaPool *pool,
 				     SECItem *dest,
 				     SEC_PKCS7ContentInfo *cinfo,
 				     PK11SymKey *bulkkey,
 				     SECKEYGetPasswordKey pwfn,
 				     void *pwfnarg);
 /*
  * For those who want to simply point to the pkcs7 contentInfo ASN.1
  * template, and *not* call the encoding functions directly, the
  * following function can be used -- after it is called, the entire
  * PKCS7 contentInfo is ready to be encoded.
  */
 extern SECStatus SEC_PKCS7PrepareForEncode (SEC_PKCS7ContentInfo *cinfo,
 					    PK11SymKey *bulkkey,
 					    SECKEYGetPasswordKey pwfn,
 					    void *pwfnarg);
 /*
  * Start the process of encoding a PKCS7 object.  The first part of
  * the encoded object will be passed to the output function right away;
  * after that it is expected that SEC_PKCS7EncoderUpdate will be called,
  * streaming in the actual content that is getting included as well as
  * signed or encrypted (or both).
  *
  * "cinfo" specifies the object to be encoded.
  *
  * "outputfn" is where the encoded bytes will be passed.
  *
  * "outputarg" is an opaque argument to the above callback.
  *
  * "bulkkey" specifies the bulk encryption key to use.   This argument
  * can be NULL if no encryption is being done, or if the bulk key should
  * be generated internally (usually the case for EnvelopedData but never
  * for EncryptedData, which *must* provide a bulk encryption key).
  *
  * Returns an object to be passed to EncoderUpdate and EncoderFinish.
  */
 extern SEC_PKCS7EncoderContext *
 SEC_PKCS7EncoderStart (SEC_PKCS7ContentInfo *cinfo,
 		       SEC_PKCS7EncoderOutputCallback outputfn,
 		       void *outputarg,
 		       PK11SymKey *bulkkey);
 /*
  * Encode more contents, hashing and/or encrypting along the way.
  */
 extern SECStatus SEC_PKCS7EncoderUpdate (SEC_PKCS7EncoderContext *p7ecx,
 					 const char *buf,
 					 unsigned long len);
 /*
  * No more contents; finish the signature creation, if appropriate,
  * and then the encoding.
  *
  * "pwfn" is a callback for getting the password which protects the
  * signer's private key.  This argument can be NULL if it is known
  * that no signing is going to be done.
  *
  * "pwfnarg" is an opaque argument to the above callback.
  */
 extern SECStatus SEC_PKCS7EncoderFinish (SEC_PKCS7EncoderContext *p7ecx,
 					 SECKEYGetPasswordKey pwfn,
 					 void *pwfnarg);
 /*  Abort the underlying ASN.1 stream & set an error  */
 void SEC_PKCS7EncoderAbort(SEC_PKCS7EncoderContext *p7dcx, int error);
 /* retrieve the algorithm ID used to encrypt the content info
  * for encrypted and enveloped data.  The SECAlgorithmID pointer
  * returned needs to be freed as it is a copy of the algorithm
  * id in the content info.
  */
 extern SECAlgorithmID *
 SEC_PKCS7GetEncryptionAlgorithm(SEC_PKCS7ContentInfo *cinfo);
 /* the content of an encrypted data content info is encrypted.
  * it is assumed that for encrypted data, that the data has already
  * been set and is in the "plainContent" field of the content info.
  *
  * cinfo is the content info to encrypt
  *
  * key is the key with which to perform the encryption.  if the
  *     algorithm is a password based encryption algorithm, the
  *     key is actually a password which will be processed per
  *     PKCS #5.
  *
  * in the event of an error, SECFailure is returned.  SECSuccess
  * indicates a success.
  */
 extern SECStatus
 SEC_PKCS7EncryptContents(PLArenaPool *poolp,
 			 SEC_PKCS7ContentInfo *cinfo,
 			 SECItem *key,
 			 void *wincx);
 /* the content of an encrypted data content info is decrypted.
  * it is assumed that for encrypted data, that the data has already
  * been set and is in the "encContent" field of the content info.
  *
  * cinfo is the content info to decrypt
  *
  * key is the key with which to perform the decryption.  if the
  *     algorithm is a password based encryption algorithm, the
  *     key is actually a password which will be processed per
  *     PKCS #5.
  *
  * in the event of an error, SECFailure is returned.  SECSuccess
  * indicates a success.
  */
 extern SECStatus
 SEC_PKCS7DecryptContents(PLArenaPool *poolp,
 			 SEC_PKCS7ContentInfo *cinfo,
 			 SECItem *key,
 			 void *wincx);
 /* retrieve the certificate list from the content info.  the list
  * is a pointer to the list in the content info.  this should not
  * be deleted or freed in any way short of calling
  * SEC_PKCS7DestroyContentInfo
  */
 extern SECItem **
 SEC_PKCS7GetCertificateList(SEC_PKCS7ContentInfo *cinfo);
 /* Returns the key length (in bits) of the algorithm used to encrypt
    this object.  Returns 0 if it's not encrypted, or the key length is
    irrelevant. */
 extern int
 SEC_PKCS7GetKeyLength(SEC_PKCS7ContentInfo *cinfo);
 /************************************************************************/
 SEC_END_PROTOS
 #endif /* _SECPKCS7_H_ */

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security/nss/lib/pkcs7/secpkcs7.h