キーチェーンから証明書をエクスポートするには、証明書を作成した人が必要です。プロビジョニングポータルからダウンロードした証明書は公開鍵であり、秘密鍵は含まれていません。
アップルのテクニカルノートからコード署名について
Note: In the case of missing Private Keys for your certificates,
Automatic Device Provisioning can restore your certificate to the
keychain, but not the missing private keys.
Transferring Your Identities Once you have a healthy working code
signing configuration set up it is recommended that you follow the
steps in section Transfer Your Developer Profile to Another Computer
of the Xcode 4 User Guide to create a backup of them. The backup can
be used to restore your working code signing configuration from
hardware failure, or to enable code signing on additional Macs,
partitions, or OS X user accounts of your choice. The backup
(.developerprofile file) once created contains all of the following
items:
all iPhone Developer certificates in your keychain all iPhone
Distribution certificates in your keychain all Provisioning Profiles
in the Xcode Organizer > Devices tab > Provisioning Profiles section
under "Library" Note: While creating the backup of your identities you
will be asked to enter a brand new password. Be sure to remember as
you'll be asked to enter that password later to use the backup for its
intended purposes.
テクニカルノートTN2250