diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/generators/PKCS12ParametersGenerator.java')
| -rw-r--r-- | core/src/main/java/org/bouncycastle/crypto/generators/PKCS12ParametersGenerator.java | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/generators/PKCS12ParametersGenerator.java b/core/src/main/java/org/bouncycastle/crypto/generators/PKCS12ParametersGenerator.java deleted file mode 100644 index d9b82c32..00000000 --- a/core/src/main/java/org/bouncycastle/crypto/generators/PKCS12ParametersGenerator.java +++ /dev/null @@ -1,220 +0,0 @@ -package org.bouncycastle.crypto.generators; - -import org.bouncycastle.crypto.CipherParameters; -import org.bouncycastle.crypto.Digest; -import org.bouncycastle.crypto.ExtendedDigest; -import org.bouncycastle.crypto.PBEParametersGenerator; -import org.bouncycastle.crypto.params.KeyParameter; -import org.bouncycastle.crypto.params.ParametersWithIV; - -/** - * Generator for PBE derived keys and ivs as defined by PKCS 12 V1.0. - * <p> - * The document this implementation is based on can be found at - * <a href=http://www.rsasecurity.com/rsalabs/pkcs/pkcs-12/index.html> - * RSA's PKCS12 Page</a> - */ -public class PKCS12ParametersGenerator - extends PBEParametersGenerator -{ - public static final int KEY_MATERIAL = 1; - public static final int IV_MATERIAL = 2; - public static final int MAC_MATERIAL = 3; - - private Digest digest; - - private int u; - private int v; - - /** - * Construct a PKCS 12 Parameters generator. This constructor will - * accept any digest which also implements ExtendedDigest. - * - * @param digest the digest to be used as the source of derived keys. - * @exception IllegalArgumentException if an unknown digest is passed in. - */ - public PKCS12ParametersGenerator( - Digest digest) - { - this.digest = digest; - if (digest instanceof ExtendedDigest) - { - u = digest.getDigestSize(); - v = ((ExtendedDigest)digest).getByteLength(); - } - else - { - throw new IllegalArgumentException("Digest " + digest.getAlgorithmName() + " unsupported"); - } - } - - /** - * add a + b + 1, returning the result in a. The a value is treated - * as a BigInteger of length (b.length * 8) bits. The result is - * modulo 2^b.length in case of overflow. - */ - private void adjust( - byte[] a, - int aOff, - byte[] b) - { - int x = (b[b.length - 1] & 0xff) + (a[aOff + b.length - 1] & 0xff) + 1; - - a[aOff + b.length - 1] = (byte)x; - x >>>= 8; - - for (int i = b.length - 2; i >= 0; i--) - { - x += (b[i] & 0xff) + (a[aOff + i] & 0xff); - a[aOff + i] = (byte)x; - x >>>= 8; - } - } - - /** - * generation of a derived key ala PKCS12 V1.0. - */ - private byte[] generateDerivedKey( - int idByte, - int n) - { - byte[] D = new byte[v]; - byte[] dKey = new byte[n]; - - for (int i = 0; i != D.length; i++) - { - D[i] = (byte)idByte; - } - - byte[] S; - - if ((salt != null) && (salt.length != 0)) - { - S = new byte[v * ((salt.length + v - 1) / v)]; - - for (int i = 0; i != S.length; i++) - { - S[i] = salt[i % salt.length]; - } - } - else - { - S = new byte[0]; - } - - byte[] P; - - if ((password != null) && (password.length != 0)) - { - P = new byte[v * ((password.length + v - 1) / v)]; - - for (int i = 0; i != P.length; i++) - { - P[i] = password[i % password.length]; - } - } - else - { - P = new byte[0]; - } - - byte[] I = new byte[S.length + P.length]; - - System.arraycopy(S, 0, I, 0, S.length); - System.arraycopy(P, 0, I, S.length, P.length); - - byte[] B = new byte[v]; - int c = (n + u - 1) / u; - byte[] A = new byte[u]; - - for (int i = 1; i <= c; i++) - { - digest.update(D, 0, D.length); - digest.update(I, 0, I.length); - digest.doFinal(A, 0); - for (int j = 1; j < iterationCount; j++) - { - digest.update(A, 0, A.length); - digest.doFinal(A, 0); - } - - for (int j = 0; j != B.length; j++) - { - B[j] = A[j % A.length]; - } - - for (int j = 0; j != I.length / v; j++) - { - adjust(I, j * v, B); - } - - if (i == c) - { - System.arraycopy(A, 0, dKey, (i - 1) * u, dKey.length - ((i - 1) * u)); - } - else - { - System.arraycopy(A, 0, dKey, (i - 1) * u, A.length); - } - } - - return dKey; - } - - /** - * Generate a key parameter derived from the password, salt, and iteration - * count we are currently initialised with. - * - * @param keySize the size of the key we want (in bits) - * @return a KeyParameter object. - */ - public CipherParameters generateDerivedParameters( - int keySize) - { - keySize = keySize / 8; - - byte[] dKey = generateDerivedKey(KEY_MATERIAL, keySize); - - return new KeyParameter(dKey, 0, keySize); - } - - /** - * Generate a key with initialisation vector parameter derived from - * the password, salt, and iteration count we are currently initialised - * with. - * - * @param keySize the size of the key we want (in bits) - * @param ivSize the size of the iv we want (in bits) - * @return a ParametersWithIV object. - */ - public CipherParameters generateDerivedParameters( - int keySize, - int ivSize) - { - keySize = keySize / 8; - ivSize = ivSize / 8; - - byte[] dKey = generateDerivedKey(KEY_MATERIAL, keySize); - - byte[] iv = generateDerivedKey(IV_MATERIAL, ivSize); - - return new ParametersWithIV(new KeyParameter(dKey, 0, keySize), iv, 0, ivSize); - } - - /** - * Generate a key parameter for use with a MAC derived from the password, - * salt, and iteration count we are currently initialised with. - * - * @param keySize the size of the key we want (in bits) - * @return a KeyParameter object. - */ - public CipherParameters generateDerivedMacParameters( - int keySize) - { - keySize = keySize / 8; - - byte[] dKey = generateDerivedKey(MAC_MATERIAL, keySize); - - return new KeyParameter(dKey, 0, keySize); - } -} |