Konstantinos Chalkias 4a9ff84fc7 Allowing multiple signature algorithms (#250) ... Basic crypto API to support 5 signature schemes and MetaData-ed signatures. Supported schemes: (1) RSA_SHA256, (2) ECDSA_SECP256K1_SHA256, (3) ECDSA_SECP256R1_SHA256, (4) EDDSA_ED25519_SHA512, (5) SPHINCS-256_SHA512. To sign a transaction, a signer should create a MetaData wrapper that contains transaction's merkle root and some extra information, such as signer's public key, timestamp and visibleInputs. Actually, MetaData is utilised to support a practical partial, blind and extra-data attached signature model. When a MetaData object is signed, the signer sends a TransactionSignature object that contains the signed output and the corresponding MetaData object. Remarks: This is an temporary solution for signature algorithmic agility. Further development is required for a robust and extensible Crypto Manager/Provider PKI that will support certificate creation, key generation, signing/verifying, deterministic key derivation, encoding formats, SGX/HSM support, identity and key management, versioning, revocation, asynchronicity, metadata, partial sig. policies etc.		2017-03-08 17:45:23 +00:00
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src	Allowing multiple signature algorithms (#250)	2017-03-08 17:45:23 +00:00
build.gradle	Exclude old version of Javassist in favour of Hibernate's version from Node. (#320)	2017-03-07 11:43:06 +00:00