来源：https://github.com/sailtsao/iReSign
这里有个开源的签名工具，已经修改为支持dylib frameworks等的签名了，使用这个签名不会出现任何问题
iReSign
iReSign allows iDevice app bundles (.ipa) files to be signed or resigned with a digital certificate from Apple for distribution. This tool is aimed at enterprises users, for enterprise deployment, when the person signing the app is different than the person(s) developing it.
How to use
iReSign allows you to re-sign any unencrypted ipa-file with any certificate for which you hold the corresponding private key.
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Drag your unsigned .ipa file to the top box, or use the browse button.
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Enter your full certificate name from Keychain Access, for example "iPhone Developer: Firstname Lastname (XXXXXXXXXX)" in the bottom box.
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Click ReSign! and wait. The resigned file will be saved in the same folder as the original file.
License
Copyright (c) 2014 Maciej Swic
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.