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This code allows us to parse: - PKCS#7 signed data messages. Only a single signer info is supported, which is all that the Linux sign-file utility supports creating out-of-the-box. Only RSA, SHA-256 and SHA-512 are supported. Any certificate embedded in the PKCS#7 message will be ignored. Signed-off-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com> Reviewed-by: Avnish Chouhan <avnish@linux.ibm.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>