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int i2d_ECDSA_SIG ( const ECDSA_SIG *  a,
unsigned char **  pp 
)

i2d_ECDSA_SIG DER encode content of ECDSA_SIG object (note: this function modifies *pp (*pp += length of the DER encoded signature)).

Parameters:
a pointer to the ECDSA_SIG object
pp pointer to a unsigned char pointer for the output or NULL
Returns:
the length of the DER encoded ECDSA_SIG object or 0

Referenced by ECDSA_sign_ex().


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