3.1.4.1.1.3.5 X509Thumbprint Parameter

This parameter MUST contain a sequence of 40 hexadecimal digital characters. The characters MUST be limited to alphanumeric hexadecimal digits. If the character is an alphabetical character, it MUST be uppercased. Specifically, the characters MUST only be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, or F. The sequence MUST NOT contain any spaces.