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| # This workflow will build a Java project with Maven | ||
| # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven | ||
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| name: Java CI with Maven | ||
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| on: [push, pull_request] | ||
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| jobs: | ||
| build: | ||
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| runs-on: ubuntu-latest | ||
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| steps: | ||
| - uses: actions/checkout@v2 | ||
| - name: Set up JDK 11 | ||
| uses: actions/setup-java@v1 | ||
| with: | ||
| java-version: 11 | ||
| - name: Build with Maven | ||
| run: mvn -B package --file pom.xml |
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103 changes: 103 additions & 0 deletions
103
.../dsf-bpe-process-base/src/main/java/org/highmed/dsf/fhir/variables/BloomFilterConfig.java
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| package org.highmed.dsf.fhir.variables; | ||
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| import java.security.Key; | ||
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| import javax.crypto.spec.SecretKeySpec; | ||
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| import com.fasterxml.jackson.annotation.JsonCreator; | ||
| import com.fasterxml.jackson.annotation.JsonIgnore; | ||
| import com.fasterxml.jackson.annotation.JsonProperty; | ||
| import com.fasterxml.jackson.databind.annotation.JsonDeserialize; | ||
| import com.fasterxml.jackson.databind.annotation.JsonSerialize; | ||
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| public class BloomFilterConfig | ||
| { | ||
| private static final int SEED_LENGTH = 8; | ||
| private static final int HMAC_SHA2_KEY_LENGTH = 32; | ||
| private static final int HMAC_SHA3_KEY_LENGTH = 32; | ||
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| private final long permutationSeed; | ||
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| @JsonDeserialize(using = KeyDeserializer.class) | ||
| @JsonSerialize(using = KeySerializer.class) | ||
| private final Key hmacSha2Key; | ||
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| @JsonDeserialize(using = KeyDeserializer.class) | ||
| @JsonSerialize(using = KeySerializer.class) | ||
| private final Key hmacSha3Key; | ||
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| public static BloomFilterConfig fromBytes(byte[] bytes) | ||
| { | ||
| if (bytes.length != SEED_LENGTH + HMAC_SHA2_KEY_LENGTH + HMAC_SHA3_KEY_LENGTH) | ||
| throw new IllegalArgumentException( | ||
| "bytes.length = " + (SEED_LENGTH + HMAC_SHA2_KEY_LENGTH + HMAC_SHA3_KEY_LENGTH) | ||
| + " expected, but got " + bytes.length); | ||
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| byte[] seed = new byte[SEED_LENGTH]; | ||
| byte[] key1 = new byte[HMAC_SHA2_KEY_LENGTH]; | ||
| byte[] key2 = new byte[HMAC_SHA3_KEY_LENGTH]; | ||
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| System.arraycopy(bytes, 0, seed, 0, seed.length); | ||
| System.arraycopy(bytes, seed.length, key1, 0, key1.length); | ||
| System.arraycopy(bytes, seed.length + key1.length, key2, 0, key2.length); | ||
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| long permutationSeed = bigEndianToLong(seed); | ||
| Key hmacSha2Key = new SecretKeySpec(key1, "HmacSHA256"); | ||
| Key hmacSha3Key = new SecretKeySpec(key2, "HmacSHA3-256"); | ||
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| return new BloomFilterConfig(permutationSeed, hmacSha2Key, hmacSha3Key); | ||
| } | ||
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| @JsonCreator | ||
| public BloomFilterConfig(@JsonProperty("permutationSeed") long permutationSeed, | ||
| @JsonProperty("hmacSha2Key") Key hmacSha2Key, @JsonProperty("hmacSha3Key") Key hmacSha3Key) | ||
| { | ||
| this.permutationSeed = permutationSeed; | ||
| this.hmacSha2Key = hmacSha2Key; | ||
| this.hmacSha3Key = hmacSha3Key; | ||
| } | ||
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| public long getPermutationSeed() | ||
| { | ||
| return permutationSeed; | ||
| } | ||
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| public Key getHmacSha2Key() | ||
| { | ||
| return hmacSha2Key; | ||
| } | ||
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| public Key getHmacSha3Key() | ||
| { | ||
| return hmacSha3Key; | ||
| } | ||
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| @JsonIgnore | ||
| public byte[] toBytes() | ||
| { | ||
| byte[] bytes = new byte[SEED_LENGTH + HMAC_SHA2_KEY_LENGTH + HMAC_SHA3_KEY_LENGTH]; | ||
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| byte[] seed = longToBigEndian(permutationSeed); | ||
| byte[] key1 = hmacSha2Key.getEncoded(); | ||
| byte[] key2 = hmacSha3Key.getEncoded(); | ||
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| System.arraycopy(seed, 0, bytes, 0, seed.length); | ||
| System.arraycopy(key1, 0, bytes, SEED_LENGTH, key1.length); | ||
| System.arraycopy(key2, 0, bytes, SEED_LENGTH + HMAC_SHA2_KEY_LENGTH, key2.length); | ||
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| return bytes; | ||
| } | ||
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| private static byte[] longToBigEndian(long l) | ||
| { | ||
| return new byte[] { (byte) (l >>> 56), (byte) (l >>> 48), (byte) (l >>> 40), (byte) (l >>> 32), | ||
| (byte) (l >>> 24), (byte) (l >>> 16), (byte) (l >>> 8), (byte) (l >>> 0) }; | ||
| } | ||
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| private static long bigEndianToLong(byte[] b) | ||
| { | ||
| return (((long) b[0] << 56) + ((long) (b[1] & 255) << 48) + ((long) (b[2] & 255) << 40) | ||
| + ((long) (b[3] & 255) << 32) + ((long) (b[4] & 255) << 24) + ((b[5] & 255) << 16) + ((b[6] & 255) << 8) | ||
| + ((b[7] & 255) << 0)); | ||
| } | ||
| } |
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