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# 通用密钥库密码算法规格

## 支持的算法类型及参数组合

### 导入\生成密钥规格

| 算法                        | API级别 | 支持的密钥长度     |
| -------------- | :---------------: | ------------------ |
| AES    |        8+         | 128、192、256 |
| RSA    |        8+         | 512、768、1024、2048、3072、4096 |
| HMAC   |        8+         | 8-1024(含),必须是8的倍数   |
| ECC    |        8+         | 224、256、384、521 |
| ED25519 |        8+         | 256    |
| X25519  |        8+         | 256    |
| DSA    |        8+         | 8-1024(含),8的倍数    |
| DH    |        8+         | 2048、3072、4096                |
| SM2    |        9+         | 256                |
| SM3    |        9+         | 256                |
| SM4    |        9+         | 128                |

### 加密解密

| 算法                     | API级别 | 备注                                                         |
| ----------------------- | :----: | ---------------- |
| AES/CBC/NoPadding<br>AES/ECB/NoPadding<br>AES/CTR/NoPadding<br>AES/GCM/NoPadding<br>AES/CBC/PKCS7<br>AES/ECB/PKCS7 | 8+                | 1. CBC\ECB\CTR模式IV参数必选<br>2. GCM模式下Nonce、AAD、AEAD参数必选   |
| RSA/ECB/NoPadding<br>RSA/ECB/PKCS1_V1_5<br>RSA/ECB/OAEP             | 8+                |    |
| SM4/CTR/NoPadding<br>SM4/ECB/NoPadding<br>SM4/CBC/NoPadding<br>SM4/ECB/PKCS7<br>SM4/CBC/PKCS7 | 9+                |   |



### 签名验签


| 算法      | API级别 | 备注     |
| --------- | :----------: | ----------------- |
| RSA/MD5/PKCS1_V1_5<br>RSA/SHA1/PKCS1_V1_5<br>RSA/SHA224/PKCS1_V1_5<br>RSA/SHA256/PKCS1_V1_5<br>RSA/SHA384/PKCS1_V1_5<br>RSA/SHA512/PKCS1_V1_5<br>RSA/SHA1/PSS<br>RSA/SHA224/PSS<br>RSA/SHA256/PSS<br>RSA/SHA384/PSS | 8+                | | 
| RSA/NoDigest/PKCS1_V1_5 | 9+                | | 
| DSA/SHA1<br>DSA/SHA224<br>DSA/SHA256<br>DSA/SHA384<br>DSA/SHA512     |  8+                | |
| DSA/NoDigest     |  9+                | |
| ECC/SHA1<br>ECC/SHA224<br>ECC/SHA256<br>ECC/SHA384<br>ECC/SHA512      | 8+                | |
| ECC/NoDigest     |  9+                | |
| ED25519/SHA1<br>ED25519/SHA224<br>ED25519/SHA256<br>ED25519/SHA384<br>ED25519/SHA512 |8+                | |
| ED25519/NoDigest     |  9+                | |
| SM2/SM3<br>SM2/NoDigest |9+                | |

### 密钥协商

| 算法   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | API级别 | 备注     |
| ------ | :-----------: | ------------------------------ |
| ECDH    | 8+   |  协商密钥类型为ECC类型密钥  |
| DH        | 8+  |             |
| X25519  | 8+  |             |

### 密钥派生

| 算法 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |API级别         | 派生密钥及长度              | 备注                  |
| ------------------------- | :-----------: | ------------ | ----------------- |
| HKDF/SHA256<br>HKDF/SHA384<br>HKDF/SHA512   | 8+ | 算法:AES、HMAC、SM4 长度:256、384、512 | 派生出的密钥可以存储到HUKS或者直接返回明文 |
| PBKDF2/SHA256<br>PBKDF2/SHA384<br>PBKDF2/SHA512    | 8+ | 算法:AES、HMAC、SM4 长度:256、384、512 | 派生出的密钥可以存储到HUKS或者直接返回明文 |

### 密钥证明

| 算法 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |API级别	| 备注                                            |
| ------------------ | :-----: | ------------------------------------------------------------ |
| RSA | 9+ |  仅支持Padding为PSS的密钥 |
| ECC                | 9+ |   |
| X25519             | 9+ |   |

## 密钥材料格式
针对不同密码算法的密钥对、公钥、私钥,HUKS定义了一套密钥材料格式。

### 密钥对材料
**密钥对材料 = 密钥对材料Header + 密钥对材料原文**

以RSA密钥为例,应用需要申请一个Uint8Array,按照RSA密钥对材料内存格式,将各个变量赋值到对应的位置:

**图4** RSA密钥材料内存结构

![huks_keymaterial_struct](figures/huks_keymaterial_struct.png)

```ts
let rsa2048KeyPairMaterial = new Uint8Array([
    0x01, 0x00, 0x00, 0x00, // 密钥算法:huks.HuksKeyAlg.HUKS_ALG_RSA = 1
    0x00, 0x08, 0x00, 0x00, // 密钥大小(比特):2048
    0x00, 0x01, 0x00, 0x00, // 模数n长度(字节):256
    0x03, 0x00, 0x00, 0x00, // 公钥指数e长度(字节):3
    0x00, 0x01, 0x00, 0x00, // 私钥指数d长度(字节):256
    // 模数n
    0xc5, 0x35, 0x62, 0x48, 0xc4, 0x92, 0x87, 0x73, 0x0d, 0x42, 0x96, 0xfc, 0x7b, 0x11, 0x05, 0x06,
    0x0f, 0x8d, 0x66, 0xc1, 0x0e, 0xad, 0x37, 0x44, 0x92, 0x95, 0x2f, 0x6a, 0x55, 0xba, 0xec, 0x1d,
    0x54, 0x62, 0x0a, 0x4b, 0xd3, 0xc7, 0x05, 0xe4, 0x07, 0x40, 0xd9, 0xb7, 0xc2, 0x12, 0xcb, 0x9a,
    0x90, 0xad, 0xe3, 0x24, 0xe8, 0x5e, 0xa6, 0xf8, 0xd0, 0x6e, 0xbc, 0xd1, 0x69, 0x7f, 0x6b, 0xe4,
    0x2b, 0x4e, 0x1a, 0x65, 0xbb, 0x73, 0x88, 0x6b, 0x7c, 0xaf, 0x7e, 0xd0, 0x47, 0x26, 0xeb, 0xa5,
    0xbe, 0xd6, 0xe8, 0xee, 0x9c, 0xa5, 0x66, 0xa5, 0xc9, 0xd3, 0x25, 0x13, 0xc4, 0x0e, 0x6c, 0xab,
    0x50, 0xb6, 0x50, 0xc9, 0xce, 0x8f, 0x0a, 0x0b, 0xc6, 0x28, 0x69, 0xe9, 0x83, 0x69, 0xde, 0x42,
    0x56, 0x79, 0x7f, 0xde, 0x86, 0x24, 0xca, 0xfc, 0xaa, 0xc0, 0xf3, 0xf3, 0x7f, 0x92, 0x8e, 0x8a,
    0x12, 0x52, 0xfe, 0x50, 0xb1, 0x5e, 0x8c, 0x01, 0xce, 0xfc, 0x7e, 0xf2, 0x4f, 0x5f, 0x03, 0xfe,
    0xa7, 0xcd, 0xa1, 0xfc, 0x94, 0x52, 0x00, 0x8b, 0x9b, 0x7f, 0x09, 0xab, 0xa8, 0xa4, 0xf5, 0xb4,
    0xa5, 0xaa, 0xfc, 0x72, 0xeb, 0x17, 0x40, 0xa9, 0xee, 0xbe, 0x8f, 0xc2, 0xd1, 0x80, 0xc2, 0x0d,
    0x44, 0xa9, 0x59, 0x44, 0x59, 0x81, 0x3b, 0x5d, 0x4a, 0xde, 0xfb, 0xae, 0x24, 0xfc, 0xa3, 0xd9,
    0xbc, 0x57, 0x55, 0xc2, 0x26, 0xbc, 0x19, 0xa7, 0x9a, 0xc5, 0x59, 0xa3, 0xee, 0x5a, 0xef, 0x41,
    0x80, 0x7d, 0xf8, 0x5e, 0xc1, 0x1d, 0x32, 0x38, 0x41, 0x5b, 0xb6, 0x92, 0xb8, 0xb7, 0x03, 0x0d,
    0x3e, 0x59, 0x0f, 0x1c, 0xb3, 0xe1, 0x2a, 0x95, 0x1a, 0x3b, 0x50, 0x4f, 0xc4, 0x1d, 0xcf, 0x73,
    0x7c, 0x14, 0xca, 0xe3, 0x0b, 0xa7, 0xc7, 0x1a, 0x41, 0x4a, 0xee, 0xbe, 0x1f, 0x43, 0xdd, 0xf9,
    // 公钥指数e
    0x01, 0x00, 0x01,
    // 私钥指数d
    0x88, 0x4b, 0x82, 0xe7, 0xe3, 0xe3, 0x99, 0x75, 0x6c, 0x9e, 0xaf, 0x17, 0x44, 0x3e, 0xd9, 0x07,
    0xfd, 0x4b, 0xae, 0xce, 0x92, 0xc4, 0x28, 0x44, 0x5e, 0x42, 0x79, 0x08, 0xb6, 0xc3, 0x7f, 0x58,
    0x2d, 0xef, 0xac, 0x4a, 0x07, 0xcd, 0xaf, 0x46, 0x8f, 0xb4, 0xc4, 0x43, 0xf9, 0xff, 0x5f, 0x74,
    0x2d, 0xb5, 0xe0, 0x1c, 0xab, 0xf4, 0x6e, 0xd5, 0xdb, 0xc8, 0x0c, 0xfb, 0x76, 0x3c, 0x38, 0x66,
    0xf3, 0x7f, 0x01, 0x43, 0x7a, 0x30, 0x39, 0x02, 0x80, 0xa4, 0x11, 0xb3, 0x04, 0xd9, 0xe3, 0x57,
    0x23, 0xf4, 0x07, 0xfc, 0x91, 0x8a, 0xc6, 0xcc, 0xa2, 0x16, 0x29, 0xb3, 0xe5, 0x76, 0x4a, 0xa8,
    0x84, 0x19, 0xdc, 0xef, 0xfc, 0xb0, 0x63, 0x33, 0x0b, 0xfa, 0xf6, 0x68, 0x0b, 0x08, 0xea, 0x31,
    0x52, 0xee, 0x99, 0xef, 0x43, 0x2a, 0xbe, 0x97, 0xad, 0xb3, 0xb9, 0x66, 0x7a, 0xae, 0xe1, 0x8f,
    0x57, 0x86, 0xe5, 0xfe, 0x14, 0x3c, 0x81, 0xd0, 0x64, 0xf8, 0x86, 0x1a, 0x0b, 0x40, 0x58, 0xc9,
    0x33, 0x49, 0xb8, 0x99, 0xc6, 0x2e, 0x94, 0x70, 0xee, 0x09, 0x88, 0xe1, 0x5c, 0x4e, 0x6c, 0x22,
    0x72, 0xa7, 0x2a, 0x21, 0xdd, 0xd7, 0x1d, 0xfc, 0x63, 0x15, 0x0b, 0xde, 0x06, 0x9c, 0xf3, 0x28,
    0xf3, 0xac, 0x4a, 0xa8, 0xb5, 0x50, 0xca, 0x9b, 0xcc, 0x0a, 0x04, 0xfe, 0x3f, 0x98, 0x68, 0x81,
    0xac, 0x24, 0x53, 0xea, 0x1f, 0x1c, 0x6e, 0x5e, 0xca, 0xe8, 0x31, 0x0d, 0x08, 0x12, 0xf3, 0x26,
    0xf8, 0x5e, 0xeb, 0x10, 0x27, 0xae, 0xaa, 0xc3, 0xad, 0x6c, 0xc1, 0x89, 0xdb, 0x7d, 0x5a, 0x12,
    0x55, 0xad, 0x11, 0x19, 0xa1, 0xa9, 0x8f, 0x0b, 0x6d, 0x78, 0x8d, 0x1c, 0xdf, 0xe5, 0x63, 0x82,
    0x0b, 0x7d, 0x23, 0x04, 0xb4, 0x75, 0x8c, 0xed, 0x77, 0xfc, 0x1a, 0x85, 0x29, 0x11, 0xe0, 0x61,
    ]);
```

其中,密钥算法的值取自枚举类[HuksKeyAlg](../reference/apis/js-apis-huks.md#hukskeyalg)

- **RSA密钥对材料格式:**
    | 密钥算法 | 密钥大小 | 模数n长度L<sub>n</sub> | 公钥指数e长度L<sub>e</sub> | 私钥指数d长度L<sub>d</sub> | n | e | d |
    | :----: |:----:|:----:|:----:|:----:|:----:|:----:|:----:|
    |4字节|4字节|4字节|4字节|4字节|L<sub>n</sub>字节 |L<sub>e</sub>字节 |L<sub>d</sub>字节 |


- **ECC密钥对材料格式:**
    | 密钥算法 | 密钥大小 | 坐标x长度L<sub>x</sub> | 坐标y长度L<sub>y</sub> | 坐标z长度L<sub>z</sub> | x | y | z |
    | :----: |:----:|:----:|:----:|:----:|:----:|:----:|:----:|
    |4字节|4字节|4字节|4字节|4字节|L<sub>x</sub>字节 |L<sub>y</sub>字节 |L<sub>z</sub>字节 |


- **DSA密钥对材料格式:**
    | 密钥算法 | 密钥大小 | 私钥x长度L<sub>x</sub> | 公钥y长度L<sub>y</sub> | 素数p长度L<sub>p</sub> | 素因子q长度L<sub>q</sub> | g长度L<sub>g</sub> | x | y | p | q | g |
    | :----: |:----:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|
    |4字节|4字节|4字节|4字节|4字节|4字节|4字节|L<sub>x</sub>字节 |L<sub>y</sub>字节 |L<sub>p</sub>字节 |L<sub>q</sub>字节 |L<sub>g</sub>字节 |


- **DH密钥对材料格式:**
    | 密钥算法 | 密钥大小 | 公钥pk长度L<sub>pk</sub> | 私钥sk长度L<sub>sk</sub> | 保留字段 | pk | sk |
    |:----:|:----:|:----:|:----:|:----:|:----:|:----:|
    |4字节|4字节|4字节|4字节|4字节|L<sub>pk</sub>字节 |L<sub>sk</sub>字节 |


- **Curve25519密钥对材料格式:**
    | 密钥算法 | 密钥大小 | 公钥pk长度L<sub>pk</sub> | 私钥sk长度L<sub>sk</sub> | 保留字段 | pk | sk |
    |:----:|:----:|:----:|:----:|:----:|:----:|:----:|
    |4字节|4字节|4字节|4字节|4字节|L<sub>pk</sub>字节 |L<sub>sk</sub>字节 |


### 公钥材料

在公钥导出/导入时,密钥材料采用标准的X.509规范的DER格式封装。

如下是一个DER编码的ECC公钥:
```ts
let eccP256PubKey = new Uint8Array([
  0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
  0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, 0x42, 0x00, 0x04, 0xc0, 0xfe, 0x1c, 0x67, 0xde,
  0x86, 0x0e, 0xfb, 0xaf, 0xb5, 0x85, 0x52, 0xb4, 0x0e, 0x1f, 0x6c, 0x6c, 0xaa, 0xc5, 0xd9, 0xd2,
  0x4d, 0xb0, 0x8a, 0x72, 0x24, 0xa1, 0x99, 0xaf, 0xfc, 0x3e, 0x55, 0x5a, 0xac, 0x99, 0x3d, 0xe8,
  0x34, 0x72, 0xb9, 0x47, 0x9c, 0xa6, 0xd8, 0xfb, 0x00, 0xa0, 0x1f, 0x9f, 0x7a, 0x41, 0xe5, 0x44,
  0x3e, 0xb2, 0x76, 0x08, 0xa2, 0xbd, 0xe9, 0x41, 0xd5, 0x2b, 0x9e]);
```

### 私钥材料

复用密钥对的材料格式,私钥材料的封装是把密钥对材料Header中的公钥部分的长度字段置0,同时密钥对材料原文部分拼接私钥材料即可。

**私钥材料 = 密钥对材料Header + 私钥材料原文**

以RSA私钥材料为例:

![huks_keymaterial_rsa_priv_struct](figures/huks_keymaterial_rsa_priv_struct.png)

```ts
let rsa2048PrivateKeyMaterial = new Uint8Array([
    0x01, 0x00, 0x00, 0x00, // 密钥算法:huks.HuksKeyAlg.HUKS_ALG_RSA = 1
    0x00, 0x08, 0x00, 0x00, // 密钥大小(比特):2048
    0x00, 0x01, 0x00, 0x00, // 模数n长度(字节):256
    0x00, 0x00, 0x00, 0x00, // 公钥指数e长度(字节):0
    0x00, 0x01, 0x00, 0x00, // 私钥指数d长度(字节):256
    // 模数n
    0xc5, 0x35, 0x62, 0x48, 0xc4, 0x92, 0x87, 0x73, 0x0d, 0x42, 0x96, 0xfc, 0x7b, 0x11, 0x05, 0x06,
    0x0f, 0x8d, 0x66, 0xc1, 0x0e, 0xad, 0x37, 0x44, 0x92, 0x95, 0x2f, 0x6a, 0x55, 0xba, 0xec, 0x1d,
    0x54, 0x62, 0x0a, 0x4b, 0xd3, 0xc7, 0x05, 0xe4, 0x07, 0x40, 0xd9, 0xb7, 0xc2, 0x12, 0xcb, 0x9a,
    0x90, 0xad, 0xe3, 0x24, 0xe8, 0x5e, 0xa6, 0xf8, 0xd0, 0x6e, 0xbc, 0xd1, 0x69, 0x7f, 0x6b, 0xe4,
    0x2b, 0x4e, 0x1a, 0x65, 0xbb, 0x73, 0x88, 0x6b, 0x7c, 0xaf, 0x7e, 0xd0, 0x47, 0x26, 0xeb, 0xa5,
    0xbe, 0xd6, 0xe8, 0xee, 0x9c, 0xa5, 0x66, 0xa5, 0xc9, 0xd3, 0x25, 0x13, 0xc4, 0x0e, 0x6c, 0xab,
    0x50, 0xb6, 0x50, 0xc9, 0xce, 0x8f, 0x0a, 0x0b, 0xc6, 0x28, 0x69, 0xe9, 0x83, 0x69, 0xde, 0x42,
    0x56, 0x79, 0x7f, 0xde, 0x86, 0x24, 0xca, 0xfc, 0xaa, 0xc0, 0xf3, 0xf3, 0x7f, 0x92, 0x8e, 0x8a,
    0x12, 0x52, 0xfe, 0x50, 0xb1, 0x5e, 0x8c, 0x01, 0xce, 0xfc, 0x7e, 0xf2, 0x4f, 0x5f, 0x03, 0xfe,
    0xa7, 0xcd, 0xa1, 0xfc, 0x94, 0x52, 0x00, 0x8b, 0x9b, 0x7f, 0x09, 0xab, 0xa8, 0xa4, 0xf5, 0xb4,
    0xa5, 0xaa, 0xfc, 0x72, 0xeb, 0x17, 0x40, 0xa9, 0xee, 0xbe, 0x8f, 0xc2, 0xd1, 0x80, 0xc2, 0x0d,
    0x44, 0xa9, 0x59, 0x44, 0x59, 0x81, 0x3b, 0x5d, 0x4a, 0xde, 0xfb, 0xae, 0x24, 0xfc, 0xa3, 0xd9,
    0xbc, 0x57, 0x55, 0xc2, 0x26, 0xbc, 0x19, 0xa7, 0x9a, 0xc5, 0x59, 0xa3, 0xee, 0x5a, 0xef, 0x41,
    0x80, 0x7d, 0xf8, 0x5e, 0xc1, 0x1d, 0x32, 0x38, 0x41, 0x5b, 0xb6, 0x92, 0xb8, 0xb7, 0x03, 0x0d,
    0x3e, 0x59, 0x0f, 0x1c, 0xb3, 0xe1, 0x2a, 0x95, 0x1a, 0x3b, 0x50, 0x4f, 0xc4, 0x1d, 0xcf, 0x73,
    0x7c, 0x14, 0xca, 0xe3, 0x0b, 0xa7, 0xc7, 0x1a, 0x41, 0x4a, 0xee, 0xbe, 0x1f, 0x43, 0xdd, 0xf9,
    // 私钥指数d
    0x88, 0x4b, 0x82, 0xe7, 0xe3, 0xe3, 0x99, 0x75, 0x6c, 0x9e, 0xaf, 0x17, 0x44, 0x3e, 0xd9, 0x07,
    0xfd, 0x4b, 0xae, 0xce, 0x92, 0xc4, 0x28, 0x44, 0x5e, 0x42, 0x79, 0x08, 0xb6, 0xc3, 0x7f, 0x58,
    0x2d, 0xef, 0xac, 0x4a, 0x07, 0xcd, 0xaf, 0x46, 0x8f, 0xb4, 0xc4, 0x43, 0xf9, 0xff, 0x5f, 0x74,
    0x2d, 0xb5, 0xe0, 0x1c, 0xab, 0xf4, 0x6e, 0xd5, 0xdb, 0xc8, 0x0c, 0xfb, 0x76, 0x3c, 0x38, 0x66,
    0xf3, 0x7f, 0x01, 0x43, 0x7a, 0x30, 0x39, 0x02, 0x80, 0xa4, 0x11, 0xb3, 0x04, 0xd9, 0xe3, 0x57,
    0x23, 0xf4, 0x07, 0xfc, 0x91, 0x8a, 0xc6, 0xcc, 0xa2, 0x16, 0x29, 0xb3, 0xe5, 0x76, 0x4a, 0xa8,
    0x84, 0x19, 0xdc, 0xef, 0xfc, 0xb0, 0x63, 0x33, 0x0b, 0xfa, 0xf6, 0x68, 0x0b, 0x08, 0xea, 0x31,
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```