RSA

RSA is an asymmetric encryption algorithm. dongle supports standard RSA public key encryption/private key decryption algorithms and non-standard private key encryption/public key decryption 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 encryption and signing, good compatibility
• OAEP: Optimal Asymmetric Encryption Padding, only used for encryption/decryption, higher security (recommended for encryption)

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 OAEP for encryption/decryption
• Hash algorithm: It is recommended to use SHA256 or stronger hash algorithms, avoid using MD5 and SHA1
• Data length limitation: The length of data encrypted by RSA is limited by the key length, for large data it is recommended to use hybrid encryption with AES
• Private key security: Private keys must be properly protected and cannot be leaked

Import related modules:

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

Create Key Pair

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 OAEP)
kp.SetPadding(keypair.OAEP) 
// Set hash algorithm (optional, default is SHA256, used for OAEP padding mode)
kp.SetHash(crypto.SHA256)

Generate key pair

// 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

// 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

// 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

// 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

// 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-----`))

Encrypt via public key

Standard encryption algorithm, recommended

Input Data

// Set encryption type (optional, default is public key encryption, 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
encrypter := dongle.Encrypt.FromString("hello world").ByRsa(kp)
// Input byte slice
encrypter := dongle.Encrypt.FromBytes([]byte("hello world")).ByRsa(kp)
// Input file stream
file, _ := os.Open("test.txt")
encrypter := dongle.Encrypt.FromFile(file).ByRsa(kp)

// Check encryption error
if encrypter.Error != nil {
	fmt.Printf("Encryption error: %v\n", encrypter.Error)
	return
}

Output Data

// Output Hex encoded string
hexString := encrypter.ToHexString() // e.g.: 7fae94fd1a8b880d8d5454dd8df30c40...
// Output hex-encoded byte slice
hexBytes := encrypter.ToHexBytes()   // e.g.: []byte("7fae94fd1a8b880d8d5454dd8df30c40...")

// Output Base64 encoded string
base64String := encrypter.ToBase64String() // e.g.: f66U/RqLiA2NVFTdjfMMQA==...
// Output base64-encoded byte slice
base64Bytes := encrypter.ToBase64Bytes()   // e.g.: []byte("f66U/RqLiA2NVFTdjfMMQA==...")

// Output unencoded raw string
rawString := encrypter.ToRawString()
// Output unencoded raw byte slice
rawBytes := encrypter.ToRawBytes()

Decrypt via private key

Standard decryption algorithm, recommended

Input Data

// Set decryption type (optional, default is private key decryption, 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 hex-encoded string
decrypter := dongle.Decrypt.FromHexString(hexString).ByRsa(kp)
// Input hex-encoded byte slice
decrypter := dongle.Decrypt.FromHexBytes(hexBytes).ByRsa(kp)
// Input hex-encoded file stream
file, _ := os.Open("encrypted.hex")
decrypter := dongle.Decrypt.FromHexFile(file).ByRsa(kp)

// Input base64-encoded string
decrypter := dongle.Decrypt.FromBase64String(base64String).ByRsa(kp)
// Input base64-encoded byte slice
decrypter := dongle.Decrypt.FromBase64Bytes(base64Bytes).ByRsa(kp)
// Input base64-encoded file stream
file, _ := os.Open("encrypted.base64")
decrypter := dongle.Decrypt.FromBase64File(file).ByRsa(kp)

// Input unencoded raw string
decrypter := dongle.Decrypt.FromRawString(rawString).ByRsa(kp)
// Input unencoded raw byte slice
decrypter := dongle.Decrypt.FromRawBytes(rawBytes).ByRsa(kp)
// Input unencoded raw file stream
file, _ := os.Open("encrypted.bin")
decrypter := dongle.Decrypt.FromRawFile(file).ByRsa(kp)

// Check decryption error
if decrypter.Error != nil {
	fmt.Printf("Decryption error: %v\n", decrypter.Error)
	return
}

Output Data

// Output decrypted string
decrypter.ToString() // hello world
// Output decrypted byte slice
decrypter.ToBytes()  // []byte("hello world")

Encrypt via private key

Non-standard encryption algorithm, not recommended

Input Data

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

// Check encryption error
if encrypter.Error != nil {
	fmt.Printf("Encryption error: %v\n", encrypter.Error)
	return
}

Output Data

// Output Hex encoded string
hexString := encrypter.ToHexString() // e.g.: 7fae94fd1a8b880d8d5454dd8df30c40...
// Output hex-encoded byte slice
hexBytes := encrypter.ToHexBytes()   // e.g.: []byte("7fae94fd1a8b880d8d5454dd8df30c40...")

// Output Base64 encoded string
base64String := encrypter.ToBase64String() // e.g.: f66U/RqLiA2NVFTdjfMMQA==...
// Output base64-encoded byte slice
base64Bytes := encrypter.ToBase64Bytes()   // e.g.: []byte("f66U/RqLiA2NVFTdjfMMQA==...")

// Output unencoded raw string
rawString := encrypter.ToRawString()
// Output unencoded raw byte slice
rawBytes := encrypter.ToRawBytes()

Decrypt via public key

Non-standard decryption algorithm, not recommended

Input Data

// Set decryption 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 hex-encoded string
decrypter := dongle.Decrypt.FromHexString(hexString).ByRsa(kp)
// Input hex-encoded byte slice
decrypter := dongle.Decrypt.FromHexBytes(hexBytes).ByRsa(kp)
// Input hex-encoded file stream
file, _ := os.Open("encrypted.hex")
decrypter := dongle.Decrypt.FromHexFile(file).ByRsa(kp)

// Input base64-encoded string
decrypter := dongle.Decrypt.FromBase64String(base64String).ByRsa(kp)
// Input base64-encoded byte slice
decrypter := dongle.Decrypt.FromBase64Bytes(base64Bytes).ByRsa(kp)
// Input base64-encoded file stream
file, _ := os.Open("encrypted.base64")
decrypter := dongle.Decrypt.FromBase64File(file).ByRsa(kp)

// Input unencoded raw string
decrypter := dongle.Decrypt.FromRawString(rawString).ByRsa(kp)
// Input unencoded raw byte slice
decrypter := dongle.Decrypt.FromRawBytes(rawBytes).ByRsa(kp)
// Input unencoded raw file stream
file, _ := os.Open("encrypted.bin")
decrypter := dongle.Decrypt.FromRawFile(file).ByRsa(kp)

// Check decryption error
if decrypter.Error != nil {
	fmt.Printf("Decryption error: %v\n", decrypter.Error)
	return
}

Output Data

// Output decrypted string
decrypter.ToString() // hello world
// Output decrypted byte slice
decrypter.ToBytes()  // []byte("hello world")