Package com.itextpdf.signatures
Class SignatureMechanisms
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- com.itextpdf.signatures.SignatureMechanisms
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public class SignatureMechanisms extends java.lang.Object
Class that contains OID mappings to extract a signature algorithm name from a signature mechanism OID, and conversely, to retrieve the appropriate signature mechanism OID given a signature algorithm and a digest function.
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Field Summary
Fields Modifier and Type Field Description (package private) static java.util.Map<java.lang.String,java.lang.String>
algorithmNames
Maps IDs of signature algorithms with its human-readable name.private static IBouncyCastleFactory
BOUNCY_CASTLE_FACTORY
(package private) static java.util.Map<java.lang.String,java.lang.String>
dsaOidsByDigest
(package private) static java.util.Map<java.lang.String,java.lang.String>
ecdsaOidsByDigest
private static org.slf4j.Logger
LOGGER
(package private) static java.util.Map<java.lang.String,java.lang.String>
rsaOidsByDigest
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Constructor Summary
Constructors Constructor Description SignatureMechanisms()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.lang.String
getAlgorithm(java.lang.String oid)
Gets the algorithm name for a certain id.static java.lang.String
getMechanism(java.lang.String oid, java.lang.String digest)
Get the signing mechanism name for a certain id and digest.static java.lang.String
getSignatureMechanismOid(java.lang.String signatureAlgorithmName, java.lang.String digestAlgorithmName)
Attempt to look up the most specific OID for a given signature-digest combination.
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Field Detail
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LOGGER
private static final org.slf4j.Logger LOGGER
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BOUNCY_CASTLE_FACTORY
private static final IBouncyCastleFactory BOUNCY_CASTLE_FACTORY
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algorithmNames
static final java.util.Map<java.lang.String,java.lang.String> algorithmNames
Maps IDs of signature algorithms with its human-readable name.
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rsaOidsByDigest
static final java.util.Map<java.lang.String,java.lang.String> rsaOidsByDigest
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dsaOidsByDigest
static final java.util.Map<java.lang.String,java.lang.String> dsaOidsByDigest
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ecdsaOidsByDigest
static final java.util.Map<java.lang.String,java.lang.String> ecdsaOidsByDigest
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Method Detail
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getSignatureMechanismOid
public static java.lang.String getSignatureMechanismOid(java.lang.String signatureAlgorithmName, java.lang.String digestAlgorithmName)
Attempt to look up the most specific OID for a given signature-digest combination.- Parameters:
signatureAlgorithmName
- the name of the signature algorithmdigestAlgorithmName
- the name of the digest algorithm, if any- Returns:
- an OID string, or
null
if none was found.
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getAlgorithm
public static java.lang.String getAlgorithm(java.lang.String oid)
Gets the algorithm name for a certain id.- Parameters:
oid
- an id (for instance "1.2.840.113549.1.1.1")- Returns:
- an algorithm name (for instance "RSA")
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getMechanism
public static java.lang.String getMechanism(java.lang.String oid, java.lang.String digest)
Get the signing mechanism name for a certain id and digest.- Parameters:
oid
- an id of an algorithmdigest
- digest of an algorithm- Returns:
- name of the mechanism
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