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Diffstat (limited to 'libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/crypto/ntru/NTRUEncryptionParameters.java')
-rw-r--r--libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/crypto/ntru/NTRUEncryptionParameters.java410
1 files changed, 0 insertions, 410 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/crypto/ntru/NTRUEncryptionParameters.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/crypto/ntru/NTRUEncryptionParameters.java
deleted file mode 100644
index 8f5f9a9b6..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/crypto/ntru/NTRUEncryptionParameters.java
+++ /dev/null
@@ -1,410 +0,0 @@
-package org.spongycastle.pqc.crypto.ntru;
-
-import java.io.DataInputStream;
-import java.io.DataOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.Arrays;
-
-import org.spongycastle.crypto.Digest;
-import org.spongycastle.crypto.digests.SHA256Digest;
-import org.spongycastle.crypto.digests.SHA512Digest;
-
-/**
- * A set of parameters for NtruEncrypt. Several predefined parameter sets are available and new ones can be created as well.
- */
-public class NTRUEncryptionParameters
- implements Cloneable
-{
-
- public int N, q, df, df1, df2, df3;
- public int dr;
- public int dr1;
- public int dr2;
- public int dr3;
- public int dg;
- int llen;
- public int maxMsgLenBytes;
- public int db;
- public int bufferLenBits;
- int bufferLenTrits;
- public int dm0;
- public int pkLen;
- public int c;
- public int minCallsR;
- public int minCallsMask;
- public boolean hashSeed;
- public byte[] oid;
- public boolean sparse;
- public boolean fastFp;
- public int polyType;
- public Digest hashAlg;
-
- /**
- * Constructs a parameter set that uses ternary private keys (i.e. </code>polyType=SIMPLE</code>).
- *
- * @param N number of polynomial coefficients
- * @param q modulus
- * @param df number of ones in the private polynomial <code>f</code>
- * @param dm0 minimum acceptable number of -1's, 0's, and 1's in the polynomial <code>m'</code> in the last encryption step
- * @param db number of random bits to prepend to the message
- * @param c a parameter for the Index Generation Function ({@link org.spongycastle.pqc.crypto.ntru.IndexGenerator})
- * @param minCallsR minimum number of hash calls for the IGF to make
- * @param minCallsMask minimum number of calls to generate the masking polynomial
- * @param hashSeed whether to hash the seed in the MGF first (true) or use the seed directly (false)
- * @param oid three bytes that uniquely identify the parameter set
- * @param sparse whether to treat ternary polynomials as sparsely populated ({@link org.spongycastle.pqc.math.ntru.polynomial.SparseTernaryPolynomial} vs {@link org.spongycastle.pqc.math.ntru.polynomial.DenseTernaryPolynomial})
- * @param fastFp whether <code>f=1+p*F</code> for a ternary <code>F</code> (true) or <code>f</code> is ternary (false)
- * @param hashAlg a valid identifier for a <code>java.security.MessageDigest</code> instance such as <code>SHA-256</code>. The <code>MessageDigest</code> must support the <code>getDigestLength()</code> method.
- */
- public NTRUEncryptionParameters(int N, int q, int df, int dm0, int db, int c, int minCallsR, int minCallsMask, boolean hashSeed, byte[] oid, boolean sparse, boolean fastFp, Digest hashAlg)
- {
- this.N = N;
- this.q = q;
- this.df = df;
- this.db = db;
- this.dm0 = dm0;
- this.c = c;
- this.minCallsR = minCallsR;
- this.minCallsMask = minCallsMask;
- this.hashSeed = hashSeed;
- this.oid = oid;
- this.sparse = sparse;
- this.fastFp = fastFp;
- this.polyType = NTRUParameters.TERNARY_POLYNOMIAL_TYPE_SIMPLE;
- this.hashAlg = hashAlg;
- init();
- }
-
- /**
- * Constructs a parameter set that uses product-form private keys (i.e. </code>polyType=PRODUCT</code>).
- *
- * @param N number of polynomial coefficients
- * @param q modulus
- * @param df1 number of ones in the private polynomial <code>f1</code>
- * @param df2 number of ones in the private polynomial <code>f2</code>
- * @param df3 number of ones in the private polynomial <code>f3</code>
- * @param dm0 minimum acceptable number of -1's, 0's, and 1's in the polynomial <code>m'</code> in the last encryption step
- * @param db number of random bits to prepend to the message
- * @param c a parameter for the Index Generation Function ({@link org.spongycastle.pqc.crypto.ntru.IndexGenerator})
- * @param minCallsR minimum number of hash calls for the IGF to make
- * @param minCallsMask minimum number of calls to generate the masking polynomial
- * @param hashSeed whether to hash the seed in the MGF first (true) or use the seed directly (false)
- * @param oid three bytes that uniquely identify the parameter set
- * @param sparse whether to treat ternary polynomials as sparsely populated ({@link org.spongycastle.pqc.math.ntru.polynomial.SparseTernaryPolynomial} vs {@link org.spongycastle.pqc.math.ntru.polynomial.DenseTernaryPolynomial})
- * @param fastFp whether <code>f=1+p*F</code> for a ternary <code>F</code> (true) or <code>f</code> is ternary (false)
- * @param hashAlg a valid identifier for a <code>java.security.MessageDigest</code> instance such as <code>SHA-256</code>
- */
- public NTRUEncryptionParameters(int N, int q, int df1, int df2, int df3, int dm0, int db, int c, int minCallsR, int minCallsMask, boolean hashSeed, byte[] oid, boolean sparse, boolean fastFp, Digest hashAlg)
- {
- this.N = N;
- this.q = q;
- this.df1 = df1;
- this.df2 = df2;
- this.df3 = df3;
- this.db = db;
- this.dm0 = dm0;
- this.c = c;
- this.minCallsR = minCallsR;
- this.minCallsMask = minCallsMask;
- this.hashSeed = hashSeed;
- this.oid = oid;
- this.sparse = sparse;
- this.fastFp = fastFp;
- this.polyType = NTRUParameters.TERNARY_POLYNOMIAL_TYPE_PRODUCT;
- this.hashAlg = hashAlg;
- init();
- }
-
- private void init()
- {
- dr = df;
- dr1 = df1;
- dr2 = df2;
- dr3 = df3;
- dg = N / 3;
- llen = 1; // ceil(log2(maxMsgLenBytes))
- maxMsgLenBytes = N * 3 / 2 / 8 - llen - db / 8 - 1;
- bufferLenBits = (N * 3 / 2 + 7) / 8 * 8 + 1;
- bufferLenTrits = N - 1;
- pkLen = db;
- }
-
- /**
- * Reads a parameter set from an input stream.
- *
- * @param is an input stream
- * @throws IOException
- */
- public NTRUEncryptionParameters(InputStream is)
- throws IOException
- {
- DataInputStream dis = new DataInputStream(is);
- N = dis.readInt();
- q = dis.readInt();
- df = dis.readInt();
- df1 = dis.readInt();
- df2 = dis.readInt();
- df3 = dis.readInt();
- db = dis.readInt();
- dm0 = dis.readInt();
- c = dis.readInt();
- minCallsR = dis.readInt();
- minCallsMask = dis.readInt();
- hashSeed = dis.readBoolean();
- oid = new byte[3];
- dis.read(oid);
- sparse = dis.readBoolean();
- fastFp = dis.readBoolean();
- polyType = dis.read();
-
- String alg = dis.readUTF();
-
- if ("SHA-512".equals(alg))
- {
- hashAlg = new SHA512Digest();
- }
- else if ("SHA-256".equals(alg))
- {
- hashAlg = new SHA256Digest();
- }
-
- init();
- }
-
- public NTRUEncryptionParameters clone()
- {
- if (polyType == NTRUParameters.TERNARY_POLYNOMIAL_TYPE_SIMPLE)
- {
- return new NTRUEncryptionParameters(N, q, df, dm0, db, c, minCallsR, minCallsMask, hashSeed, oid, sparse, fastFp, hashAlg);
- }
- else
- {
- return new NTRUEncryptionParameters(N, q, df1, df2, df3, dm0, db, c, minCallsR, minCallsMask, hashSeed, oid, sparse, fastFp, hashAlg);
- }
- }
-
- /**
- * Returns the maximum length a plaintext message can be with this parameter set.
- *
- * @return the maximum length in bytes
- */
- public int getMaxMessageLength()
- {
- return maxMsgLenBytes;
- }
-
- /**
- * Writes the parameter set to an output stream
- *
- * @param os an output stream
- * @throws IOException
- */
- public void writeTo(OutputStream os)
- throws IOException
- {
- DataOutputStream dos = new DataOutputStream(os);
- dos.writeInt(N);
- dos.writeInt(q);
- dos.writeInt(df);
- dos.writeInt(df1);
- dos.writeInt(df2);
- dos.writeInt(df3);
- dos.writeInt(db);
- dos.writeInt(dm0);
- dos.writeInt(c);
- dos.writeInt(minCallsR);
- dos.writeInt(minCallsMask);
- dos.writeBoolean(hashSeed);
- dos.write(oid);
- dos.writeBoolean(sparse);
- dos.writeBoolean(fastFp);
- dos.write(polyType);
- dos.writeUTF(hashAlg.getAlgorithmName());
- }
-
-
- public int hashCode()
- {
- final int prime = 31;
- int result = 1;
- result = prime * result + N;
- result = prime * result + bufferLenBits;
- result = prime * result + bufferLenTrits;
- result = prime * result + c;
- result = prime * result + db;
- result = prime * result + df;
- result = prime * result + df1;
- result = prime * result + df2;
- result = prime * result + df3;
- result = prime * result + dg;
- result = prime * result + dm0;
- result = prime * result + dr;
- result = prime * result + dr1;
- result = prime * result + dr2;
- result = prime * result + dr3;
- result = prime * result + (fastFp ? 1231 : 1237);
- result = prime * result + ((hashAlg == null) ? 0 : hashAlg.getAlgorithmName().hashCode());
- result = prime * result + (hashSeed ? 1231 : 1237);
- result = prime * result + llen;
- result = prime * result + maxMsgLenBytes;
- result = prime * result + minCallsMask;
- result = prime * result + minCallsR;
- result = prime * result + Arrays.hashCode(oid);
- result = prime * result + pkLen;
- result = prime * result + polyType;
- result = prime * result + q;
- result = prime * result + (sparse ? 1231 : 1237);
- return result;
- }
-
- public boolean equals(Object obj)
- {
- if (this == obj)
- {
- return true;
- }
- if (obj == null)
- {
- return false;
- }
- if (getClass() != obj.getClass())
- {
- return false;
- }
- NTRUEncryptionParameters other = (NTRUEncryptionParameters)obj;
- if (N != other.N)
- {
- return false;
- }
- if (bufferLenBits != other.bufferLenBits)
- {
- return false;
- }
- if (bufferLenTrits != other.bufferLenTrits)
- {
- return false;
- }
- if (c != other.c)
- {
- return false;
- }
- if (db != other.db)
- {
- return false;
- }
- if (df != other.df)
- {
- return false;
- }
- if (df1 != other.df1)
- {
- return false;
- }
- if (df2 != other.df2)
- {
- return false;
- }
- if (df3 != other.df3)
- {
- return false;
- }
- if (dg != other.dg)
- {
- return false;
- }
- if (dm0 != other.dm0)
- {
- return false;
- }
- if (dr != other.dr)
- {
- return false;
- }
- if (dr1 != other.dr1)
- {
- return false;
- }
- if (dr2 != other.dr2)
- {
- return false;
- }
- if (dr3 != other.dr3)
- {
- return false;
- }
- if (fastFp != other.fastFp)
- {
- return false;
- }
- if (hashAlg == null)
- {
- if (other.hashAlg != null)
- {
- return false;
- }
- }
- else if (!hashAlg.getAlgorithmName().equals(other.hashAlg.getAlgorithmName()))
- {
- return false;
- }
- if (hashSeed != other.hashSeed)
- {
- return false;
- }
- if (llen != other.llen)
- {
- return false;
- }
- if (maxMsgLenBytes != other.maxMsgLenBytes)
- {
- return false;
- }
- if (minCallsMask != other.minCallsMask)
- {
- return false;
- }
- if (minCallsR != other.minCallsR)
- {
- return false;
- }
- if (!Arrays.equals(oid, other.oid))
- {
- return false;
- }
- if (pkLen != other.pkLen)
- {
- return false;
- }
- if (polyType != other.polyType)
- {
- return false;
- }
- if (q != other.q)
- {
- return false;
- }
- if (sparse != other.sparse)
- {
- return false;
- }
- return true;
- }
-
- public String toString()
- {
- StringBuilder output = new StringBuilder("EncryptionParameters(N=" + N + " q=" + q);
- if (polyType == NTRUParameters.TERNARY_POLYNOMIAL_TYPE_SIMPLE)
- {
- output.append(" polyType=SIMPLE df=" + df);
- }
- else
- {
- output.append(" polyType=PRODUCT df1=" + df1 + " df2=" + df2 + " df3=" + df3);
- }
- output.append(" dm0=" + dm0 + " db=" + db + " c=" + c + " minCallsR=" + minCallsR + " minCallsMask=" + minCallsMask +
- " hashSeed=" + hashSeed + " hashAlg=" + hashAlg + " oid=" + Arrays.toString(oid) + " sparse=" + sparse + ")");
- return output.toString();
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 19:59:12 +0000