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RSA ​

RSA digital signature is a digital signature algorithm based on asymmetric encryption. dongle supports standard RSA private key signing/public key verification algorithms and public key signing/private key verification algorithms, and provides multiple key formats, hash algorithms, and output formats.

Supported key formats:

  • PKCS1: PKCS#1 format, keys use -----BEGIN RSA PRIVATE KEY----- and -----BEGIN RSA PUBLIC KEY----- as header and footer
  • PKCS8: PKCS#8 format, keys use -----BEGIN PRIVATE KEY----- and -----BEGIN PUBLIC KEY----- as header and footer (recommended)

Supported padding modes:

  • PKCS1v15: PKCS#1 v1.5 padding mode, can be used for signing/verification, good compatibility
  • PSS: Probabilistic Signature Scheme, only used for signing/verification, higher security (recommended for signing)

Supported hash algorithms:

  • MD4: MD4 hash algorithm (not recommended for production use)
  • MD5: MD5 hash algorithm (not recommended for production use)
  • SHA1: SHA-1 hash algorithm (not recommended for production use)
  • SHA224: SHA-224 hash algorithm
  • SHA256: SHA-256 hash algorithm (recommended)
  • SHA384: SHA-384 hash algorithm
  • SHA512: SHA-512 hash algorithm
  • MD5SHA1: MD5-SHA1 hash algorithm
  • RIPEMD160: RIPEMD160 hash algorithm
  • SHA3_224: SHA3_224 hash algorithm
  • SHA3_256: SHA3_256 hash algorithm
  • SHA3_384: SHA3_384 hash algorithm
  • SHA3_512: SHA3_512 hash algorithm
  • SHA512_224: SHA512_224 hash algorithm
  • SHA512_256: SHA512_256 hash algorithm
  • BLAKE2s_256: BLAKE2s_256 hash algorithm
  • BLAKE2b_256: BLAKE2b_256 hash algorithm
  • BLAKE2b_384: BLAKE2b_384 hash algorithm
  • BLAKE2b_512: BLAKE2b_512 hash algorithm

Important Notes:

  • Key length: It is recommended to use 2048 bits or longer key length to ensure security
  • Key format: It is recommended to use PKCS8 format (modern standard)
  • Padding mode: It is recommended to use PSS for signing/verification
  • Hash algorithm: It is recommended to use SHA256 or stronger hash algorithms, avoid using MD5 and SHA1
  • Private key security: Private keys must be properly protected and cannot be leaked, only the private key holder can generate valid signatures
  • Signature verification: Anyone can use the public key to verify the validity of signatures

Import related modules:

go
import (
    "crypto"
    "github.com/dromara/dongle"
    "github.com/dromara/dongle/crypto/keypair"
)

Create key pair ​

go
kp := keypair.NewRsaKeyPair()
// Set key format (optional, default is PKCS8)
kp.SetFormat(keypair.PKCS8)
// Set padding mode (optional, default is empty, PKCS1 format defaults to PKCS1v15, PKCS8 format defaults to PSS)
kp.SetPadding(keypair.PSS)  // or keypair.PKCS1v15
// Set hash algorithm (optional, default is SHA256, used for PSS padding mode)
kp.SetHash(crypto.SHA256)

Generate key pair ​

go
// Generate 2048-bit key pair
err := kp.GenKeyPair(2048)
if err != nil {
    panic(err)
}

// Get public key in PEM format
publicKey := kp.PublicKey  
// Get private key in PEM format
privateKey := kp.PrivateKey

Set key pair from existing PEM format keys ​

go
// Set public key in PEM format
kp.PublicKey = []byte(`-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHq
X1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJ
y4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMez
HC1outlM6x+/BB0BSQIDAQAB
-----END PUBLIC KEY-----`)

// Set private key in PEM format
kp.PrivateKey = []byte(`-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`)

Set key pair from existing DER format keys ​

go
// Set base64 encoded DER format public key
kp.SetPublicKey([]byte("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHqX1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJy4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMezHC1outlM6x+/BB0BSQIDAQAB"))
// Set base64 encoded DER format private key
kp.SetPrivateKey([]byte("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"))

Format DER format keys to PEM format ​

go
// Format base64 encoded DER format public key to PEM format
publicKey, err := kp.FormatPublicKey([]byte("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHqX1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJy4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMezHC1outlM6x+/BB0BSQIDAQAB"))

// Format base64 encoded DER format private key to PEM format
privateKey, err := kp.FormatPrivateKey([]byte("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"))

Compress PEM format keys to DER format ​

go
// Compress PEM format public key to base64 encoded DER format (remove PEM format public key's header/footer and line breaks)
publicKey, err := kp.CompressPublicKey([]byte(`-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHq
X1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJ
y4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMez
HC1outlM6x+/BB0BSQIDAQAB
-----END PUBLIC KEY-----`))

// Compress PEM format private key to base64 encoded DER format (remove PEM format private key's header/footer and line breaks)
privateKey, err := kp.CompressPrivateKey([]byte(`-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`))

Private key signing ​

Standard signature algorithm, recommended

Input data ​

go
// Set signing type (optional, default is private key signing, i.e. PrivateKey)
kp.SetType(keypair.PrivateKey)
// Set DER format private key
kp.SetPrivateKey([]byte("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"))
// Set PEM format private key
kp.PrivateKey = []byte(`-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`)

// Input string
signer := dongle.Sign.FromString("hello world").ByRsa(kp)
// Input byte slice
signer := dongle.Sign.FromBytes([]byte("hello world")).ByRsa(kp)
// Input file stream
file, _ := os.Open("test.txt")
signer := dongle.Sign.FromFile(file).ByRsa(kp)

// Check signing error
if signer.Error != nil {
	fmt.Printf("Signing error: %v\n", signer.Error)
	return
}

Output data ​

go
// Output Hex-encoded signature string
hexString := signer.ToHexString() // 7fae94fd1a8b880d8d5454dd8df30c40...
// Output Hex-encoded signature byte slice
hexBytes := signer.ToHexBytes()  // []byte("7fae94fd1a8b880d8d5454dd8df30c40...")

// Output Base64-encoded signature string
base64String := signer.ToBase64String() // f66U/RqLiA2NVFTdjfMMQA==...
// Output Base64-encoded signature byte slice
base64Bytes := signer.ToBase64Bytes()  // []byte("f66U/RqLiA2NVFTdjfMMQA==...")

// Output raw signature string
rawString := signer.ToRawString()
// Output raw signature byte slice
rawBytes := signer.ToRawBytes()

Public key verification ​

Standard verification algorithm, recommended. Note: The WithXxxSign method must be called before ByRsa

Input data ​

go
// Set verification type (optional, default is public key verification, i.e. PublicKey)
kp.SetType(keypair.PublicKey)
// Set DER format public key
kp.SetPublicKey([]byte("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHqX1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJy4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMezHC1outlM6x+/BB0BSQIDAQAB"))
// Set PEM format public key
kp.PublicKey = []byte(`-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHq
X1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJ
y4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMez
HC1outlM6x+/BB0BSQIDAQAB
-----END PUBLIC KEY-----`)

// Input string
verifier := dongle.Verify.FromString("hello world")
// Input byte slice
verifier := dongle.Verify.FromBytes([]byte("hello world"))
// Input file stream
file, _ := os.Open("test.txt")
verifier := dongle.Verify.FromFile(file)

// Set Hex-encoded signature
verifier.WithHexSign(rawBytes).ByRsa(kp)
// Set Base64-encoded signature
verifier.WithBase64Sign(rawBytes).ByRsa(kp)
// Set raw signature
verifier.WithRawSign(rawBytes).ByRsa(kp)

// Check verification errors
if verifier.Error != nil {
    fmt.Printf("Verification error: %v\n", verifier.Error)
    return
}

Output data ​

go
// Output verification result
verifier.ToBool() // true or false

Public key signing ​

Non-standard signature algorithm, not recommended

Input data ​

go
// Set signing type
kp.SetType(keypair.PublicKey)
// Set DER format public key
kp.SetPublicKey([]byte("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHqX1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJy4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMezHC1outlM6x+/BB0BSQIDAQAB"))
// Set PEM format public key
kp.PublicKey = []byte(`-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqzZNa9VrcewyU6wDoV7Y9kAHq
X1VK0B3Rb6GNmQe4zLEfce7cVTaLrc4VGTKl35tADG1cRHqtaG4S/WttpiGZBhxJ
y4MpOXb6eIPiVLsn2lL+rJo5XdbSr3gyjxEOQQ97ihtw4lDd5wMo4bIOuw1LtMez
HC1outlM6x+/BB0BSQIDAQAB
-----END PUBLIC KEY-----`)

// Input string
signer := dongle.Sign.FromString("hello world").ByRsa(kp)
// Input byte slice
signer := dongle.Sign.FromBytes([]byte("hello world")).ByRsa(kp)
// Input file stream
file, _ := os.Open("test.txt")
signer := dongle.Sign.FromFile(file).ByRsa(kp)

// Check signing error
if signer.Error != nil {
	fmt.Printf("Signing error: %v\n", signer.Error)
	return
}

Output data ​

go
// Output Hex-encoded signature string
hexString := signer.ToHexString() // 7fae94fd1a8b880d8d5454dd8df30c40...
// Output Hex-encoded signature byte slice
hexBytes := signer.ToHexBytes()  // []byte("7fae94fd1a8b880d8d5454dd8df30c40...")

// Output Base64-encoded signature string
base64String := signer.ToBase64String() // f66U/RqLiA2NVFTdjfMMQA==...
// Output Base64-encoded signature byte slice
base64Bytes := signer.ToBase64Bytes()  // []byte("f66U/RqLiA2NVFTdjfMMQA==...")

// Output raw signature string
rawString := signer.ToRawString()
// Output raw signature byte slice
rawBytes := signer.ToRawBytes()

Private key verification ​

Non-standard verification algorithm, not recommended. Note: The WithXxxSign method must be called before ByRsa

Input data ​

go
// Set verification type
kp.SetType(keypair.PrivateKey)
// Set DER format private key
kp.SetPrivateKey([]byte("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"))
// Set PEM format private key
kp.PrivateKey = []byte(`-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`)

// Input string
verifier := dongle.Verify.FromString("hello world")
// Input byte slice
verifier := dongle.Verify.FromBytes([]byte("hello world"))
// Input file stream
file, _ := os.Open("test.txt")
verifier := dongle.Verify.FromFile(file)

// Set Hex-encoded signature
verifier.WithHexSign(rawBytes).ByRsa(kp)
// Set Base64-encoded signature
verifier.WithBase64Sign(rawBytes).ByRsa(kp)
// Set raw signature
verifier.WithRawSign(rawBytes).ByRsa(kp)

// Check verification errors
if verifier.Error != nil {
    fmt.Printf("Verification error: %v\n", verifier.Error)
    return
}

Output data ​

go
// Output verification result
verifier.ToBool() // true or false

Released under the MIT License, unauthorized reproduction is prohibited in any form

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