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-# lib-hpcr
\ No newline at end of file
+# lib-hpcr
+
+
+## Introduction
+
+The library has been developed to simply the process for provisioning HPVS on both IBM Cloud and On Prem.
+For more details regarding HPVS, refer [Confidential computing with LinuxONE](https://cloud.ibm.com/docs/vpc?topic=vpc-about-se)
+
+
+## Usage
+
+
+### HpcrGetAttestationRecords()
+This function decrypts encrypted attestation records.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/attestation"
+```
+
+#### Input(s)
+1. Encrypted attestation records
+2. Private key
+
+#### Output(s)
+1. Decrypted attestation records
+
+
+### HpcrDownloadEncryptionCertificates()
+This function downloads HPCR encryption certificates from IBM Cloud.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/certificate"
+```
+
+#### Input(s)
+1. List of versions to download (eg: ["1.1.14", "1.1.15"])
+
+#### Output(s)
+1. Certificates and versions as JSON string
+
+
+### HpcrGetEncryptionCertificateFromJson()
+This function returns encryption certificate and version from HpcrDownloadEncryptionCertificates() output.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/certificate"
+```
+
+#### Input(s)
+1. Encryption certificate JSON string
+2. Version name
+
+#### Output(s)
+1. Version name
+2. Encryption Certificate
+
+
+### HpcrText()
+This function generates Base64 for given string.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. Text to encode
+
+#### Output(s)
+1. Base64 of input
+2. Checksum of input
+
+
+### HpcrTextEncrypted()
+This function encrypts text and formats text as per `hyper-protect-basic.<encoded-encrypted-password>.<encoded-encrypted-data>`.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. Text to encrypt
+2. Encryption certificate (optional)
+
+#### Output(s)
+1. Encrypted text
+2. Checksum of input
+
+
+### HpcrJson()
+This function generates Base64 of JSON input
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. Text to encode
+
+#### Output(s)
+1. Base64 of input
+2. Checksum of input
+
+
+### HpcrJsonEncrypted()
+This function generates encrypts JSON and formats text as per `hyper-protect-basic.<encoded-encrypted-password>.<encoded-encrypted-data>`.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. JSON text to encrypt
+2. Encryption certificate (optional)
+
+#### Output(s)
+1. Encrypted text
+2. Checksum of input
+
+
+### HpcrTgz()
+This function generates base64 of TGZ that contains files under the given folder
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. Path of folder
+
+#### Output(s)
+1. Base64 of TGZ where TGZ is contents of given folder
+
+
+### HpcrTgzEncrypted()
+This function first generates base64 of TGZ that contains files under the given folder and then encrypts the data as per `hyper-protect-basic.<encoded-encrypted-password>.<encoded-encrypted-data>`.
+
+#### Input(s)
+1. Path of folder
+
+#### Output(s)
+1. encrypted base64 of TGZ where TGZ is contents of given folder
+
+
+### HpcrContractSignedEncrypted()
+This function generates a signed and encrypted contract with format `hyper-protect-basic.<encoded-encrypted-password>.<encoded-encrypted-data>`.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. Contract
+2. Encryption certificate (optional)
+3. Private Key for signing
+
+#### Output(s)
+1. Signed and encrypted contract
+
+
+### HpcrContractSignedEncryptedContractExpiry()
+This function generates a signed and encrypted contract with contract expiry enabled. The output will be of the format `hyper-protect-basic.<encoded-encrypted-password>.<encoded-encrypted-data>`.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/contract"
+```
+
+#### Input(s)
+1. Contract
+2. Encryption certificate (optional)
+3. Private Key for signing
+4. CA Certificate
+5. CA Key
+6. CSR Parameter JSON as string
+7. CSR PEM file
+8. Expiry of contract in number of days
+
+The point 6 and 7 if one of. That is, either CSR parameters or CSR PEM file.
+
+The CSR parameters should be of the format:-
+
+```
+"country":  "IN",
+"state":    "Karnataka",
+"location": "Bangalore",
+"org":      "IBM",
+"unit":     "ISDL",
+"domain":   "HPVS",
+"mail":     "sashwat.k@ibm.com"
+```
+
+#### Output(s)
+1. Signed and encrypted contract
+
+
+### HpcrSelectImage()
+This function selects the latest HPCR image details from image list out from IBM Cloud images API.
+
+```go
+import "github.com/Sashwat-K/lib-hpcr/image"
+```
+
+#### Input(s)
+1. Image JSON from IBM Cloud images API
+2. version to select (optional)
+
+#### Output(s)
+1. Image ID
+2. Image name
+3. Image checksum
+4. Image version
+
+
+## Questions
+Ping me in slack @Sashwat