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## org.bouncycastle.jce
Class PKCS7SignedData

    java.lang.Object
      |
      +--org.bouncycastle.jce.PKCS7SignedData

All Implemented Interfaces:
  PKCSObjectIdentifiers

public class PKCS7SignedData
extends java.lang.Object
implements PKCSObjectIdentifiers

Represents a PKCS#7 object - specifically the "Signed Data" type.

How to use it? To verify a signature, do:

     PKCS7SignedData pkcs7 = new PKCS7SignedData(der_bytes);		// Create it
     pkcs7.update(bytes, 0, bytes.length);	// Update checksum
     boolean verified = pkcs7.verify();		// Does it add up?

     To sign, do this:
     PKCS7SignedData pkcs7 = new PKCS7SignedData(privKey, certChain, "MD5");
     pkcs7.update(bytes, 0, bytes.length);	// Update checksum
     pkcs7.sign();				// Create digest

     bytes = pkcs7.getEncoded();			// Write it somewhere

This class is pretty close to obsolete, for a much better (and more complete) implementation of PKCS7 have a look at the org.bouncycastle.cms package.

Field Summary

Fields inherited from interface org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers
`bagtypes, canNotDecryptAny, certBag, crlBag, data, des_EDE3_CBC, dhKeyAgreement, digestedData, encryptedData, encryptionAlgorithm, envelopedData, id_aa, id_aa_encrypKeyPref, id_ct_compressedData, id_PBES2, id_PBKDF2, keyBag, md2, md2WithRSAEncryption, md4WithRSAEncryption, md5, md5WithRSAEncryption, pkcs_1, pkcs_12, pkcs_3, pkcs_5, pkcs_7, pkcs_9, pkcs_9_at_challengePassword, pkcs_9_at_contentType, pkcs_9_at_counterSignature, pkcs_9_at_emailAddress, pkcs_9_at_extendedCertificateAttributes, pkcs_9_at_extensionRequest, pkcs_9_at_friendlyName, pkcs_9_at_localKeyId, pkcs_9_at_messageDigest, pkcs_9_at_signingDescription, pkcs_9_at_signingTime, pkcs_9_at_smimeCapabilities, pkcs_9_at_unstructuredAddress, pkcs_9_at_unstructuredName, pkcs8ShroudedKeyBag, preferSignedData, RC2_CBC, rsaEncryption, safeContentsBag, secretBag, sha1WithRSAEncryption, sha256WithRSAEncryption, sha384WithRSAEncryption, sha512WithRSAEncryption, signedAndEnvelopedData, signedData, sMIMECapabilitiesVersions, srsaOAEPEncryptionSET, x509certType`

Constructor Summary
`PKCS7SignedData(byte[] in)` Read an existing PKCS#7 object from a DER encoded byte array using the BC provider.
`PKCS7SignedData(byte[] in, java.lang.String provider)` Read an existing PKCS#7 object from a DER encoded byte array
`PKCS7SignedData(java.security.PrivateKey privKey, Certificate[] certChain, CRL[] crlList, java.lang.String hashAlgorithm, java.lang.String provider)` Create a new PKCS#7 object from the specified key.
`PKCS7SignedData(java.security.PrivateKey privKey, Certificate[] certChain, java.lang.String hashAlgorithm)` Create a new PKCS#7 object from the specified key using the BC provider.
`PKCS7SignedData(java.security.PrivateKey privKey, Certificate[] certChain, java.lang.String hashAlgorithm, java.lang.String provider)` Create a new PKCS#7 object from the specified key.

Method Summary
`Certificate[]` | `getCertificates()` Get the X.509 certificates associated with this PKCS#7 object
`Collection` | `getCRLs()` Get the X.509 certificate revocation lists associated with this PKCS#7 object
`java.lang.String` | `getDigestAlgorithm()` Get the algorithm used to calculate the message digest
`byte[]` | `getEncoded()` return the bytes for the PKCS7SignedData object.
`X509Certificate` | `getSigningCertificate()` Get the X.509 certificate actually used to sign the digest.
`int` | `getSigningInfoVersion()` Get the version of the PKCS#7 "SignerInfo" object.
`int` | `getVersion()` Get the version of the PKCS#7 object.
`void` | `reset()` Resets the PKCS7SignedData object to it's initial state, ready to sign or verify a new buffer.
`void` | `update(byte buf)` Update the digest with the specified byte.
`void` | `update(byte[] buf, int off, int len)` Update the digest with the specified bytes.
`boolean` | `verify()` Verify the digest

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PKCS7SignedData

    public PKCS7SignedData(byte[] in)
                    throws java.lang.SecurityException,
                           CRLException,
                           java.security.InvalidKeyException,
                           CertificateException,
                           java.security.NoSuchProviderException,
                           java.security.NoSuchAlgorithmException

  Read an existing PKCS#7 object from a DER encoded byte array using the BC provider.

### PKCS7SignedData

    public PKCS7SignedData(byte[] in,
                           java.lang.String provider)
                    throws java.lang.SecurityException,
                           CRLException,
                           java.security.InvalidKeyException,
                           CertificateException,
                           java.security.NoSuchProviderException,
                           java.security.NoSuchAlgorithmException

  Read an existing PKCS#7 object from a DER encoded byte array

### PKCS7SignedData

    public PKCS7SignedData(java.security.PrivateKey privKey,
                           Certificate[] certChain,
                           java.lang.String hashAlgorithm)
                    throws java.lang.SecurityException,
                           java.security.InvalidKeyException,
                           java.security.NoSuchProviderException,
                           java.security.NoSuchAlgorithmException

  Create a new PKCS#7 object from the specified key using the BC provider.

Parameters:
  `hashAlgorithm` - the hashing algorithm used to compute the message digest. Must be "MD5", "MD2", "SHA1" or "SHA"

### PKCS7SignedData

    public PKCS7SignedData(java.security.PrivateKey privKey,
                           Certificate[] certChain,
                           java.lang.String hashAlgorithm,
                           java.lang.String provider)
                    throws java.lang.SecurityException,
                           java.security.InvalidKeyException,
                           java.security.NoSuchProviderException,
                           java.security.NoSuchAlgorithmException

  Create a new PKCS#7 object from the specified key.

Parameters:
  `privKey` - the private key to be used for signing.
  `certChain` - the certificate chain associated with the private key.
  `hashAlgorithm` - the hashing algorithm used to compute the message digest. Must be "MD5", "MD2", "SHA1" or "SHA"
  `provider` - the provider to use.

### PKCS7SignedData

    public PKCS7SignedData(java.security.PrivateKey privKey,
                           Certificate[] certChain,
                           CRL[] crlList,
                           java.lang.String hashAlgorithm,
                           java.lang.String provider)
                    throws java.lang.SecurityException,
                           java.security.InvalidKeyException,
                           java.security.NoSuchProviderException,
                           java.security.NoSuchAlgorithmException

  Create a new PKCS#7 object from the specified key.

Parameters:
  `privKey` - the private key to be used for signing.
  `certChain` - the certificate chain associated with the private key.
  `crlList` - the crl list associated with the private key.
  `hashAlgorithm` - the hashing algorithm used to compute the message digest. Must be "MD5", "MD2", "SHA1" or "SHA"
  `provider` - the provider to use.

Method Detail

### getDigestAlgorithm

    public java.lang.String getDigestAlgorithm()

  Get the algorithm used to calculate the message digest

### reset

    public void reset()

  Resets the PKCS7SignedData object to it's initial state, ready to sign or verify a new buffer.

### getCertificates

    public Certificate[] getCertificates()

  Get the X.509 certificates associated with this PKCS#7 object

### getCRLs

    public Collection getCRLs()

  Get the X.509 certificate revocation lists associated with this PKCS#7 object

### getSigningCertificate

    public X509Certificate getSigningCertificate()

  Get the X.509 certificate actually used to sign the digest.

### getVersion

    public int getVersion()

  Get the version of the PKCS#7 object. Always 1

### getSigningInfoVersion

    public int getSigningInfoVersion()

  Get the version of the PKCS#7 "SignerInfo" object. Always 1

### update

    public void update(byte buf)
                throws java.security.SignatureException

  Update the digest with the specified byte. This method is used both for signing and verifying

    `java.security.SignatureException`

### update

    public void update(byte[] buf,
                       int off,
                       int len)
                throws java.security.SignatureException

  Update the digest with the specified bytes. This method is used both for signing and verifying

    `java.security.SignatureException`

### verify

    public boolean verify()
                   throws java.security.SignatureException

  Verify the digest

    `java.security.SignatureException`

### getEncoded

    public byte[] getEncoded()

  return the bytes for the PKCS7SignedData object.

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