// CVSS vector parser.
package cvss

//go:generate stringer -linecomment -type=v2Metric

// CVSS v2 metric value
type v2Metric byte

const (
  v2AVNetwork v2Metric = iota // AV:N
  v2AVAdjacentNetwork // AV:A
  v2AVLocal // AV:L

  v2ACLow // AC:L
  v2ACMedium // AC:L
  v2ACHigh // AC:H

  v2AuMultiple // Au:M
  v2AuSingle // Au:S
  v2AuNone // Au:N

  v2CNone // C:N
  v2CPartial // C:P
  v2CComplete // C:C

  v2INone // I:N
  v2IPartial // I:P
  v2IComplete // I:C

  v2ANone // A:N
  v2APartial // A:P
  v2AComplete // A:C

  v2ENotDefined // E:ND
  v2EUnproven // E:U
  v2EProofOfConcept // E:POC
  v2EFunctional // E:F
  v2EHigh // E:H

  v2RLOfficialFix // RL:OF
  v2RLTemporaryFix // RL:TF
  v2RLWorkaround // RL:W
  v2RLUnavailable // RL:U
  v2RLNotDefined // RL:ND

  v2RCUnconfirmed // RC:UC
  v2RCUncorroborated // RC:UR
  v2RCConfirmed // RC:C
  v2RCNotDefined // RC:ND

  v2CDPNone // CDP:N
  v2CDPLow // CDP:L
  v2CDPLowMedium // CDP:LM
  v2CDPMediumHigh // CDP:MH
  v2CDPHigh // CDP:H
  v2CDPNotDefined // CDP:ND

  v2TDNone // TD:N
  v2TDLow // TD:L
  v2TDMedium // TD:M
  v2TDHigh // TD:H
  v2TDNotDefined // TD:ND

  v2CRLow // CR:L
  v2CRMedium // CR:M
  v2CRHigh // CR:H
  v2CRNotDefined // CR:ND

  v2IRLow // IR:L
  v2IRMedium // IR:M
  v2IRHigh // IR:H
  v2IRNotDefined // IR:ND

  v2ARLow // AR:L
  v2ARMedium // AR:M
  v2ARHigh // AR:H
  v2ARNotDefined // AR:ND

  v2InvalidMetric // invalid
)

// map of metrics to metric keys
var v2KeyLut = map[v2Metric]v2Key {
  v2AVNetwork: v2AccessVector,
  v2AVAdjacentNetwork: v2AccessVector,
  v2AVLocal: v2AccessVector,

  v2ACLow: v2AccessComplexity,
  v2ACMedium: v2AccessComplexity,
  v2ACHigh: v2AccessComplexity,

  v2AuMultiple: v2Authentication,
  v2AuSingle: v2Authentication,
  v2AuNone: v2Authentication,

  v2CNone: v2ConfidentialityImpact,
  v2CPartial: v2ConfidentialityImpact,
  v2CComplete: v2ConfidentialityImpact,

  v2INone: v2IntegrityImpact,
  v2IPartial: v2IntegrityImpact,
  v2IComplete: v2IntegrityImpact,

  v2ANone: v2AvailabilityImpact,
  v2APartial: v2AvailabilityImpact,
  v2AComplete: v2AvailabilityImpact,

  v2ENotDefined: v2Exploitability,
  v2EUnproven: v2Exploitability,
  v2EProofOfConcept: v2Exploitability,
  v2EFunctional: v2Exploitability,
  v2EHigh: v2Exploitability,

  v2RLOfficialFix: v2RemediationLevel,
  v2RLTemporaryFix: v2RemediationLevel,
  v2RLWorkaround: v2RemediationLevel,
  v2RLUnavailable: v2RemediationLevel,
  v2RLNotDefined: v2RemediationLevel,

  v2RCUnconfirmed: v2ReportConfidence,
  v2RCUncorroborated: v2ReportConfidence,
  v2RCConfirmed: v2ReportConfidence,
  v2RCNotDefined: v2ReportConfidence,

  v2CDPNone: v2CollateralDamagePotential,
  v2CDPLow: v2CollateralDamagePotential,
  v2CDPLowMedium: v2CollateralDamagePotential,
  v2CDPMediumHigh: v2CollateralDamagePotential,
  v2CDPHigh: v2CollateralDamagePotential,
  v2CDPNotDefined: v2CollateralDamagePotential,

  v2TDNone: v2TargetDistribution,
  v2TDLow: v2TargetDistribution,
  v2TDMedium: v2TargetDistribution,
  v2TDHigh: v2TargetDistribution,
  v2TDNotDefined: v2TargetDistribution,

  v2CRLow: v2ConfidentialityRequirement,
  v2CRMedium: v2ConfidentialityRequirement,
  v2CRHigh: v2ConfidentialityRequirement,
  v2CRNotDefined: v2ConfidentialityRequirement,

  v2IRLow: v2IntegrityRequirement,
  v2IRMedium: v2IntegrityRequirement,
  v2IRHigh: v2IntegrityRequirement,
  v2IRNotDefined: v2IntegrityRequirement,

  v2ARLow: v2AvailabilityRequirement,
  v2ARMedium: v2AvailabilityRequirement,
  v2ARHigh: v2AvailabilityRequirement,
  v2ARNotDefined: v2AvailabilityRequirement,
}

// map of metric strings to metrics
var v2MetricStrLut = map[string]v2Metric {
  "AV:N": v2AVNetwork,
  "AV:A": v2AVAdjacentNetwork,
  "AV:L": v2AVLocal,

  "AC:L": v2ACLow,
  "AC:M": v2ACMedium,
  "AC:H": v2ACHigh,

  "Au:M": v2AuMultiple,
  "Au:S": v2AuSingle,
  "Au:N": v2AuNone,

  "C:N": v2CNone,
  "C:P": v2CPartial,
  "C:C": v2CComplete,

  "I:N": v2INone,
  "I:P": v2IPartial,
  "I:C": v2IComplete,

  "A:N": v2ANone,
  "A:P": v2APartial,
  "A:C": v2AComplete,

  "E:ND": v2ENotDefined,
  "E:U": v2EUnproven,
  "E:POC": v2EProofOfConcept,
  "E:F": v2EFunctional,
  "E:H": v2EHigh,

  "RL:OF": v2RLOfficialFix,
  "RL:TF": v2RLTemporaryFix,
  "RL:W": v2RLWorkaround,
  "RL:U": v2RLUnavailable,
  "RL:ND": v2RLNotDefined,

  "RC:UC": v2RCUnconfirmed,
  "RC:UR": v2RCUncorroborated,
  "RC:C": v2RCConfirmed,
  "RC:ND": v2RCNotDefined,

  "CDP:N": v2CDPNone,
  "CDP:L": v2CDPLow,
  "CDP:LM": v2CDPLowMedium,
  "CDP:MH": v2CDPMediumHigh,
  "CDP:H": v2CDPHigh,
  "CDP:ND": v2CDPNotDefined,

  "TD:N": v2TDNone,
  "TD:L": v2TDLow,
  "TD:M": v2TDMedium,
  "TD:H": v2TDHigh,
  "TD:ND": v2TDNotDefined,

  "CR:L": v2CRLow,
  "CR:M": v2CRMedium,
  "CR:H": v2CRHigh,
  "CR:ND": v2CRNotDefined,

  "IR:L": v2IRLow,
  "IR:M": v2IRMedium,
  "IR:H": v2IRHigh,
  "IR:ND": v2IRNotDefined,

  "AR:L": v2ARLow,
  "AR:M": v2ARMedium,
  "AR:H": v2ARHigh,
  "AR:ND": v2ARNotDefined,
}

// Convert string to CVSS 2.0 metric.
func getV2MetricFromString(s string) (v2Metric, error) {
  // get metric
  m, ok := v2MetricStrLut[s]
  if !ok {
    return v2InvalidMetric, newBadMetric(V20, s)
  }

  // return success
  return m, nil
}

// Get CVSS 2.0 metric key.
func (m v2Metric) Key() Key {
  k, _ := v2KeyLut[m]
  return k
}