Namespace: go.std.crypto.elliptic

v1.0

Contents

• Summary
• Index
• Constants
• Variables
• Functions, Macros, and Special Forms
• Types

Summary

Provides a low-level interface to the crypto/elliptic package.

Package elliptic implements the standard NIST P-224, P-256, P-384, and P-521
elliptic curves over prime fields.

Index

• *CurveParams
• Curve
• CurveParams
• GenerateKey
• Marshal
• MarshalCompressed
• P224
• P256
• P384
• P521
• Unmarshal
• UnmarshalCompressed
• arrayOfCurve
• arrayOfCurveParams

Legend

Constant Variable Function Macro Special form Type GoVar Receiver/Method

Constants

Constants are variables with :const true in their metadata. Joker currently does not recognize them as special; as such, it allows redefining them or their values.

(None.)

Variables

(None.)

Functions, Macros, and Special Forms

• GenerateKey

  Function v1.0

  (GenerateKey curve rand)
  

  GenerateKey returns a public/private key pair. The private key is
  generated using the given reader, which must return random data.
  
  Go input arguments: (curve Curve, rand io.Reader)
  
  Go returns: (priv []byte, x *math/big.Int, y *math/big.Int, err error)
  
  Joker input arguments: [^Curve curve, ^go.std.io/Reader rand]
  
  Joker returns: [^arrayOfByte priv, ^go.std.math.big/*Int x, ^go.std.math.big/*Int y, ^Error err]

• Marshal

  Function v1.0

  (Marshal curve x y)
  

  Marshal converts a point on the curve into the uncompressed form specified in
  SEC 1, Version 2.0, Section 2.3.3. If the point is not on the curve (or is
  the conventional point at infinity), the behavior is undefined.
  
  Go input arguments: (curve Curve, x *math/big.Int, y *math/big.Int)
  
  Go returns: []byte
  
  Joker input arguments: [^Curve curve, ^go.std.math.big/*Int x, ^go.std.math.big/*Int y]
  
  Joker returns: ^arrayOfByte

• MarshalCompressed

  Function v1.0

  (MarshalCompressed curve x y)
  

  MarshalCompressed converts a point on the curve into the compressed form
  specified in SEC 1, Version 2.0, Section 2.3.3. If the point is not on the
  curve (or is the conventional point at infinity), the behavior is undefined.
  
  Go input arguments: (curve Curve, x *math/big.Int, y *math/big.Int)
  
  Go returns: []byte
  
  Joker input arguments: [^Curve curve, ^go.std.math.big/*Int x, ^go.std.math.big/*Int y]
  
  Joker returns: ^arrayOfByte

• P224

  Function v1.0

  (P224)
  

  P224 returns a Curve which implements NIST P-224 (FIPS 186-3, section D.2.2),
  also known as secp224r1. The CurveParams.Name of this Curve is "P-224".
  
  Multiple invocations of this function will return the same value, so it can
  be used for equality checks and switch statements.
  
  The cryptographic operations are implemented using constant-time algorithms.
  
  Go returns: Curve
  
  Joker input arguments: []
  
  Joker returns: ^Curve

• P256

  Function v1.0

  (P256)
  

  P256 returns a Curve which implements NIST P-256 (FIPS 186-3, section D.2.3),
  also known as secp256r1 or prime256v1. The CurveParams.Name of this Curve is
  "P-256".
  
  Multiple invocations of this function will return the same value, so it can
  be used for equality checks and switch statements.
  
  ScalarMult and ScalarBaseMult are implemented using constant-time algorithms.
  
  Go returns: Curve
  
  Joker input arguments: []
  
  Joker returns: ^Curve

• P384

  Function v1.0

  (P384)
  

  P384 returns a Curve which implements NIST P-384 (FIPS 186-3, section D.2.4),
  also known as secp384r1. The CurveParams.Name of this Curve is "P-384".
  
  Multiple invocations of this function will return the same value, so it can
  be used for equality checks and switch statements.
  
  The cryptographic operations are implemented using constant-time algorithms.
  
  Go returns: Curve
  
  Joker input arguments: []
  
  Joker returns: ^Curve

• P521

  Function v1.0

  (P521)
  

  P521 returns a Curve which implements NIST P-521 (FIPS 186-3, section D.2.5),
  also known as secp521r1. The CurveParams.Name of this Curve is "P-521".
  
  Multiple invocations of this function will return the same value, so it can
  be used for equality checks and switch statements.
  
  The cryptographic operations are implemented using constant-time algorithms.
  
  Go returns: Curve
  
  Joker input arguments: []
  
  Joker returns: ^Curve

• Unmarshal

  Function v1.0

  (Unmarshal curve data)
  

  Unmarshal converts a point, serialized by Marshal, into an x, y pair. It is
  an error if the point is not in uncompressed form, is not on the curve, or is
  the point at infinity. On error, x = nil.
  
  Go input arguments: (curve Curve, data []byte)
  
  Go returns: (x *math/big.Int, y *math/big.Int)
  
  Joker input arguments: [^Curve curve, ^arrayOfByte data]
  
  Joker returns: [^go.std.math.big/*Int x, ^go.std.math.big/*Int y]

• UnmarshalCompressed

  Function v1.0

  (UnmarshalCompressed curve data)
  

  UnmarshalCompressed converts a point, serialized by MarshalCompressed, into
  an x, y pair. It is an error if the point is not in compressed form, is not
  on the curve, or is the point at infinity. On error, x = nil.
  
  Go input arguments: (curve Curve, data []byte)
  
  Go returns: (x *math/big.Int, y *math/big.Int)
  
  Joker input arguments: [^Curve curve, ^arrayOfByte data]
  
  Joker returns: [^go.std.math.big/*Int x, ^go.std.math.big/*Int y]

Types

• *CurveParams

  Concrete Type v1.0

  CurveParams contains the parameters of an elliptic curve and also provides
  a generic, non-constant time implementation of Curve.
  

• Add

  Receiver for *CurveParams v1.0

  ([x1 y1 x2 y2])
  

• Double

  Receiver for *CurveParams v1.0

  ([x1 y1])
  

• IsOnCurve

  Receiver for *CurveParams v1.0

  ([x y])
  

• Params

  Receiver for *CurveParams v1.0

  ([])
  

• ScalarBaseMult

  Receiver for *CurveParams v1.0

  ([k])
  

• ScalarMult

  Receiver for *CurveParams v1.0

  ([Bx By k])
  

• Curve

  Abstract Type v1.0

  A Curve represents a short-form Weierstrass curve with a=-3.
  
  The behavior of Add, Double, and ScalarMult when the input is not a point on
  the curve is undefined.
  
  Note that the conventional point at infinity (0, 0) is not considered on the
  curve, although it can be returned by Add, Double, ScalarMult, or
  ScalarBaseMult (but not the Unmarshal or UnmarshalCompressed functions).
  

• Add

  Method for Curve v1.0

  ([x1 y1 x2 y2])
  

• Double

  Method for Curve v1.0

  ([x1 y1])
  

• IsOnCurve

  Method for Curve v1.0

  ([x y])
  

• Params

  Method for Curve v1.0

  ([])
  

• ScalarBaseMult

  Method for Curve v1.0

  ([k])
  

• ScalarMult

  Method for Curve v1.0

  ([x1 y1 k])
  

• CurveParams

  Concrete Type v1.0

  CurveParams contains the parameters of an elliptic curve and also provides
  a generic, non-constant time implementation of Curve.
  

• arrayOfCurve

  Concrete Type v1.0

  A Curve represents a short-form Weierstrass curve with a=-3.
  
  The behavior of Add, Double, and ScalarMult when the input is not a point on
  the curve is undefined.
  
  Note that the conventional point at infinity (0, 0) is not considered on the
  curve, although it can be returned by Add, Double, ScalarMult, or
  ScalarBaseMult (but not the Unmarshal or UnmarshalCompressed functions).
  

• arrayOfCurveParams

  Concrete Type v1.0

  CurveParams contains the parameters of an elliptic curve and also provides
  a generic, non-constant time implementation of Curve.