CSR文件和P10文件 ios csr文件生成

CSR文件和P10文件

1.CSR：证书签发请求(Certificate SigningRequest)，或者叫做认证申请，是一个发送到CA的请求认证信息。有两种格式，应用最广泛的是由PKCS#10定义的，另一个用的少的是由SPKAC定义的，主要应用于网景浏览器。

2.在PKCS#10定义中，CSR有两种编码格式：二进制（ASN.1或DERàDistinguished EncodingRules）和文本格式(the text or PEM (Privacy Enhanced Mail) formatted CSRis the binary CSR after it has been Base-64 encoded to create atext version of the CSR.)

Base64编码/解码

即：二进制（ASN.1或DER）<---------à文本（PEM）

3.CSR文件包含的信息描述如下：

CertificationRequest ::= SEQUENCE {

 certificationRequestInfo CertificationRequestInfo, 

signatureAlgorithm AlgorithmIdentifier{{ SignatureAlgorithms }},

 signature BIT STRING

 }

包含两个部分：证书请求信息部分、签名部分（算法和签名）。

证书请求信息：version、Distinguished Name、publickey、Attributes(属性集)，另外还可能有可选的字段，如postal address和Emailaddress，这两个字段可以应用于证书的撤销。

签名：签名算法和数字签名（private key签名）

注意：私钥不包含在CSR文件中，但是应用于数字签名。

4.请求信息定义如下：

CertificationRequestInfo ::= SEQUENCE {

 version INTEGER { v1(0) } (v1,...),

 subject Name,

 subjectPKInfo SubjectPublicKeyInfo{{ PKInfoAlgorithms }},

 attributes [0] Attributes{{ CRIAttributes }}

 }

5.CSR文件生成步骤如下：

1)根据Version、Distinguished Name、Public Key、Attributes生成请求证书；

2) 用PrivateKey加密证书请求信息；

3)根据请求信息、签名算法和签名生成CSR文件；

6.CSR文件包括的属性有：

CSR Summary

Subject

Properties

CSR Detailed Information

 Certificate Request:

 Data:

 Version: 0 (0x0)

 Subject:

 commonName = testcert.redkestrel.co.uk

 organizationName = Red Kestrel Consulting Ltd

 localityName = Stoke on Trent

 stateOrProvinceName = Staffordshire

 countryName = GB

 Subject Public Key Info:

 Public Key Algorithm: rsaEncryption

 RSA Public Key: (2048 bit)

 Modulus (2048 bit):

 00:d6:2d:e5:bc:f0:87:80:21:ad:e7:db:74:7d:f6:

 2f:3b:e1:f8:74:8d:eb:5f:f9:24:ec:18:f8:24:7c:

 65:c6:27:ef:ad:72:52:86:93:73:09:13:48:a3:0f:

 83:cd:6b:11:97:50:23:54:2e:09:f6:44:ec:b2:6e:

 6e:6c:4e:61:b3:a4:43:83:fb:50:00:03:25:7e:a4:

 b4:28:14:d9:07:10:5b:ae:74:6a:95:33:a5:e4:3d:

 67:ea:68:cd:af:2a:f7:73:51:b3:cf:0b:45:ff:31:

 f0:c5:18:fc:5c:f0:06:37:4d:43:37:f3:97:3d:73:

 df:d6:38:81:7a:35:47:00:bc:01:48:40:5d:33:1b:

 b7:af:cc:96:41:a8:36:f8:7a:75:27:6a:d3:12:2c:

 79:b1:45:63:22:d4:97:87:b5:f2:c8:35:78:4d:8a:

 d1:de:c0:44:16:80:80:77:8f:5c:66:87:b0:8f:3b:

 91:5e:4d:be:87:cd:00:f1:73:e7:fb:b8:c8:ac:63:

 ab:3d:27:f3:e1:dc:67:8e:09:e2:03:a2:8a:94:f2:

 39:df:57:97:86:13:32:0c:1f:90:85:31:98:da:8e:

 b3:4a:17:80:d8:2b:76:11:c9:42:34:2b:ae:be:bf:

 42:88:2e:85:27:b4:4b:3e:f8:cd:b4:2e:13:a7:f9:

 51:3d

 Exponent: 65537 (0x10001)

 Attributes:

 a0:00

 Signature Algorithm: sha1WithRSAEncryption

 51:61:3b:a0:15:f7:48:b8:d8:34:ce:77:6e:c0:4e:94:d1:a7:

 b2:00:29:d4:fd:5f:88:23:e9:10:a6:99:18:43:94:27:6c:4e:

 82:e2:07:4a:ed:4d:d5:98:a0:2a:95:a6:88:00:19:c6:ea:1a:

 81:6d:51:fc:03:4c:de:35:e9:bc:22:d5:05:1b:f8:d0:01:c2:

 16:ca:2d:f6:e7:6b:74:26:23:23:8d:da:0c:70:1a:62:f2:e6:

 4f:8f:cf:be:99:ed:72:7d:3f:ef:e8:3f:fd:e9:40:1e:1a:fd:

 50:8a:28:31:9c:30:c2:8e:b2:a2:6e:bb:27:07:f0:fd:b7:bf:

 83:b3:1a:7b:b9:8f:1d:9d:a5:b1:04:d2:d3:68:44:7a:a5:72:

 9c:84:64:d9:6f:66:79:05:0b:ae:df:bf:6a:da:20:d2:6a:89:

 48:1c:74:5a:cc:2d:1e:58:93:73:e9:d7:16:94:2b:c0:52:04:

 cd:5b:8f:18:23:95:c3:b2:e6:09:f3:66:1c:d0:a4:65:5b:91:

 48:90:7f:f4:c7:4b:9a:b7:f0:72:13:c8:dc:d7:93:19:27:be:

 05:97:ec:3a:da:6d:db:fe:e3:f9:ba:9e:60:a1:6e:f0:1d:2c:

 b4:ba:09:04:49:e2:87:15:28:57:5f:2e:64:e9:8e:7a:e5:6e:

 5f:53:7a:9c

CSR ASN.1 Information

长度

 0 717: SEQUENCE {

 4 437: SEQUENCE {

 8 1: INTEGER 0

 11 135: SEQUENCE {

 14 11: SET {

 16 9: SEQUENCE {

 18 3: OBJECT IDENTIFIER countryName (2 5 4 6)

 23 2: PrintableString 'GB'

 : }

 : }

 27 22: SET {

 29 20: SEQUENCE {

 31 3: OBJECT IDENTIFIER stateOrProvinceName (2 5 4 8)

 36 13: PrintableString 'Staffordshire'

 : }

 : }

 51 23: SET {

 53 21: SEQUENCE {

 55 3: OBJECT IDENTIFIER localityName (2 5 4 7)

 60 14: PrintableString 'Stoke on Trent'

 : }

 : }

 76 35: SET {

 78 33: SEQUENCE {

 80 3: OBJECT IDENTIFIER organizationName (2 5 4 10)

 85 26: PrintableString 'Red Kestrel Consulting Ltd'

 : }

 : }

 113 34: SET {

 115 32: SEQUENCE {

 117 3: OBJECT IDENTIFIER commonName (2 5 4 3)

 122 25: PrintableString 'testcert.redkestrel.co.uk'

 : }

 : }

 : }

 149 290: SEQUENCE {

 153 13: SEQUENCE {

 155 9: OBJECT IDENTIFIER rsaEncryption (1 2 840 113549 1 1 1)

 166 0: NULL

 : }

 168 271: BIT STRING

 : 30 82 01 0A 02 82 01 01 00 D6 2D E5 BC F0 87 80

 : 21 AD E7 DB 74 7D F6 2F 3B E1 F8 74 8D EB 5F F9

 : 24 EC 18 F8 24 7C 65 C6 27 EF AD 72 52 86 93 73

 : 09 13 48 A3 0F 83 CD 6B 11 97 50 23 54 2E 09 F6

 : 44 EC B2 6E 6E 6C 4E 61 B3 A4 43 83 FB 50 00 03

 : 25 7E A4 B4 28 14 D9 07 10 5B AE 74 6A 95 33 A5

 : E4 3D 67 EA 68 CD AF 2A F7 73 51 B3 CF 0B 45 FF

 : 31 F0 C5 18 FC 5C F0 06 37 4D 43 37 F3 97 3D 73

 : [ Another 142 bytes skipped ]

 : }

 443 0: [0]

 : Error: Object has zero length.

 : }

 445 13: SEQUENCE {

 447 9: OBJECT IDENTIFIER sha1withRSAEncryption (1 2 840 113549 1 1 5)

 458 0: NULL

 : }

 460 257: BIT STRING

 : 51 61 3B A0 15 F7 48 B8 D8 34 CE 77 6E C0 4E 94

 : D1 A7 B2 00 29 D4 FD 5F 88 23 E9 10 A6 99 18 43

 : 94 27 6C 4E 82 E2 07 4A ED 4D D5 98 A0 2A 95 A6

 : 88 00 19 C6 EA 1A 81 6D 51 FC 03 4C DE 35 E9 BC

 : 22 D5 05 1B F8 D0 01 C2 16 CA 2D F6 E7 6B 74 26

 : 23 23 8D DA 0C 70 1A 62 F2 E6 4F 8F CF BE 99 ED

 : 72 7D 3F EF E8 3F FD E9 40 1E 1A FD 50 8A 28 31

 : 9C 30 C2 8E B2 A2 6E BB 27 07 F0 FD B7 BF 83 B3

 : [ Another 128 bytes skipped ]

 : }

7. 签名的定义：signature is the result of signing the certification request

7. information with the certification request subject's private

7. key.

7.签名的步骤： The signature process consists of two steps:

7. 1. The value of the certificationRequestInfo component is DER

7. encoded, yielding an octet string.

7. 2. The result of step 1 is signed with the certification request

7. subject's private key under the specified signature

7. algorithm, yielding a bit string, the signature.

8.P10：证书请求文件，类似于CSR文件。

p10证书一般是一个base64文件，实际上他不是一张真正的证书

应该是一段可以向CA申请证书的P10请求，该请求一般是通过硬件生成密钥对后，将私钥单独存放，但是将公钥放入p10中，CA受到该p10请求后，可以校验，并根据p10中的信息制作一张没有私钥的公钥证书。

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