PBC Library Manual 0.5.11 - Stanford Crypto Group

Chapter 3. Pairing functions
Get ready to perform a pairing whose first input is in1, and store the results of time-saving precomputation in p.
void pairing_pp_clear(pairing_pp_t p)
Clear p. This should be called after p is no longer needed.
void pairing_pp_apply(element_t out, element_t in2, pairing_pp_t p)
Compute a pairing using in2 and the preprocessed information stored in p and store the output in out. The
inputs to the pairing are the element previously used to initialize p and the element in2.
void element_pairing(element_t out, element_t in1, element_t in2)
Computes a pairing: out = e(in1, in2), where in1, in2, out must be in the groups G1, G2, GT.
void element_prod_pairing(element_t out, element_t in1[], element_t in2[], int n)
Computes the product of pairings, that is out = e(in1[0], in2[0]) . . . e(in1[n-1], in2[n-1]). The arrays in1, in2
must have at least n elements belonging to the groups G1, G2 respectively, and out must belong to the group
GT.
3.3. Other pairing functions
int pairing_is_symmetric(pairing_t pairing)
Returns true if G1 and G2 are the same group.
int pairing_length_in_bytes_G1(pairing_t pairing)
Returns the length in bytes needed to represent an element of G1.
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