Verifying Integrity of a Web SDK Package

Description

Check the integrity of downloaded SDK packages, that is, check whether the packages are tampered with or packets are lost during download.

Starting from 1.0.17, the digital signature CMS file is used for integrity verification. In earlier versions, SHA-256 values are still used.

Verifying a Digital Signature CMS File

1. 1. Obtain the download path of the SDK package from Downloading the Web SDK.

2. Download the SDK package to your device.

3. Download the following root CA certificate and CRLs from the Huawei support website:

Root CA certificate: Huawei Software Integrity Protection Root CA.der

CRLs: HuaweiRootCA.crl, HuaweiCodeSigningCA.crl, HuaweiCodeSigningCA 2.crl, and HuaweiCodeSigningCA 3.crl

4. Convert the formats of the CA certificate and CRLs from DER to PEM.

Names of certificate to be converted may differ from those of downloaded ones. Use the actual certificate names.

For CRLs:

openssl crl -inform DER -in "HuaweiRootCA.crl" -out HuaweiRootCaCrl.pem
openssl crl -inform DER -in "HuaweiCodeSigningCA 3.crl" -out HuaweiCodeSigningCA3.pem
openssl crl -inform DER -in "HuaweiCodeSigningCA 2.crl" -out HuaweiCodeSigningCA2.pem
openssl crl -inform DER -in HuaweiCodeSigningCA.crl -out HuaweiCodeSigningCA.pem

For CA certificate:

openssl x509 -inform DER -in "Huawei Software Integrity Protection Root CA.der" -out HuaweiRootCA.pem

5. Use Notepad to open the files obtained in step 4. Copy and paste the content of HuaweiRootCaCrl.pem, HuaweiCodeSigningCA3.pem, HuaweiCodeSigningCA2.pem, and HuaweiCodeSigningCA.pem sequentially to the end of the content of HuaweiRootCA.pem.

6. Perform CMS verification.

openssl cms -verify -inform DER -crl_check_all -in hwmeeting-1.0.18.tgz.cms -content hwmeeting-1.0.18.tgz -CAfile HuaweiRootCA.pem -out cmsVerifiedData -binary -purpose any -certsout tmpCertChain.pem

If a message similar to the following is displayed, the verification is successful:

CMS Verification successful

Comparing SHA-256 Values

1. Obtain the download path of the SDK package from Downloading the Web SDK.

2. Download the SDK package to your device.

3. Open the CLI and run the following command to generate the SHA-256 value of the downloaded SDK package. In the command, D:\hwmeeting-1.0.16.tgz indicates the local path for storing the SDK package and the SDK package name. Replace it with the actual value.

certutil -hashfile D:\hwmeeting-1.0.16.tgz SHA256

The following is an example of the command output:

SHA256 D:\hwmeeting-1.0.16.tgz hash:
6d73467a02cecc3ec7852b26267d834e327064891c5a28923bd55835c82a50cd
CertUtil: -hashfile Command executed

Compare the generated SHA-256 value with that listed in the package download path table. If they are the same, no tampering or packet loss occurred during download.