### GenerateOpts Configuration

Source: https://pkg.go.dev/github.com/google/certtostore

Parameters used to configure private key generation.

```go
type GenerateOpts struct {
	// Algorithm to be used, either RSA or EC.
	Algorithm Algorithm
	// Size is used to specify the bit size of the RSA key or curve for EC keys.
	Size int
}
```

--------------------------------

### FileStorage Implementation

Source: https://pkg.go.dev/github.com/google/certtostore

Defines the FileStorage struct and its associated methods for disk-based certificate management.

```go
type FileStorage struct {
	// contains filtered or unexported fields
}
```

```go
func NewFileStorage(basepath string) *FileStorage
```

```go
func (f FileStorage) Cert() (*x509.Certificate, error)
```

```go
func (f FileStorage) CertificateChain() ([][]*x509.Certificate, error)
```

```go
func (f FileStorage) Decrypt(rand io.Reader, msg []byte, opts crypto.DecrypterOpts) ([]byte, error)
```

```go
func (f *FileStorage) Generate(opts GenerateOpts) (crypto.Signer, error)
```

```go
func (f FileStorage) Intermediate() (*x509.Certificate, error)
```

```go
func (f FileStorage) Key() (Credential, error)
```

```go
func (f FileStorage) Public() crypto.PublicKey
```

```go
func (f FileStorage) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error)
```

```go
func (f *FileStorage) Store(cert *x509.Certificate, intermediate *x509.Certificate) error
```

--------------------------------

### Algorithm.Tox509 Method

Source: https://pkg.go.dev/github.com/google/certtostore

Converts the Algorithm type to an x509.PublicKeyAlgorithm.

```go
func (a Algorithm) Tox509() x509.PublicKeyAlgorithm
```

--------------------------------

### Define Algorithm Types

Source: https://pkg.go.dev/github.com/google/certtostore

Defines the supported asymmetric algorithms for credentials.

```go
type Algorithm string
```

```go
const (
	EC  Algorithm = "EC"
	RSA Algorithm = "RSA"
)
```

--------------------------------

### Credential Interface

Source: https://pkg.go.dev/github.com/google/certtostore

Provides access to a certificate, implementing crypto.Signer and crypto.Decrypter.

```go
type Credential interface {
	// Public returns the public key corresponding to the leaf certificate.
	Public() crypto.PublicKey
	// Sign signs digest with the private key.
	Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) (signature []byte, err error)
	// Decrypt decrypts msg. Returns an error if not implemented.
	Decrypt(rand io.Reader, msg []byte, opts crypto.DecrypterOpts) (plaintext []byte, err error)
}
```

--------------------------------

### CertStorage Interface

Source: https://pkg.go.dev/github.com/google/certtostore

Defines the interface for backend certificate storage operations.

```go
type CertStorage interface {
	// Cert returns the current X509 certificate or nil if no certificate is installed.
	Cert() (*x509.Certificate, error)
	// Intermediate returns the current intermediate X509 certificate or nil if no certificate is installed.
	Intermediate() (*x509.Certificate, error)
	// CertificateChain returns the leaf and subsequent certificates.
	CertificateChain() ([][]*x509.Certificate, error)
	// Generate generates a new private key in the storage and returns a signer that can be used
	// to perform signatures with the new key and read the public portion of the key. CertStorage
	// implementations should strive to ensure a Generate call doesn't actually destroy any current
	// key or cert material and to only install the new key for clients once Store is called.
	Generate(opts GenerateOpts) (crypto.Signer, error)
	// Store finishes the cert installation started by the last Generate call with the given cert and
	// intermediate.
	Store(cert *x509.Certificate, intermediate *x509.Certificate) error
	// Key returns the certificate as a Credential (crypto.Signer and crypto.Decrypter).
	Key() (Credential, error)
}
```

--------------------------------

### Decode PEM to x509 Certificate

Source: https://pkg.go.dev/github.com/google/certtostore

Converts a raw PEM-encoded byte slice into an x509.Certificate structure.

```go
func PEMToX509(b []byte) (*x509.Certificate, error)
```

--------------------------------

### func PEMToX509

Source: https://pkg.go.dev/github.com/google/certtostore

Decodes a raw PEM certificate into an x509.Certificate structure.

```APIDOC
## func PEMToX509(b []byte) (*x509.Certificate, error)

### Description
PEMToX509 takes a raw PEM certificate and decodes it to an x509.Certificate.

### Parameters
- **b** ([]byte) - Required - The raw PEM encoded certificate data.

### Returns
- **(*x509.Certificate, error)** - Returns the decoded certificate or an error if decoding fails.
```

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