PHP openssl_get_curve_names() Function
The openssl_get_curve_names() function is an inbuilt function in PHP which is used to curve names in Elliptic curve cryptography. The two most widely standardized or supported curves are prime256v1 (NIST P-256) and secp384r1 (NIST P-384). The curve names usually contain a number which is the number of bits in the binary representation.
Approximate Equivalancies of AES, RSA, DSA and ECC KeysizesAES Symmetric Keysize (Bits)
RSA and DSA Keysize (Bits)
ECC Keysize (Bits)
80 1024 160 122 2048 224 128 3072 256 192 7680 384 256 15360 512
Syntax:
openssl_get_curve_names ( void ): array
Parameters: This function does not accept any parameter.
Return Values: This function return an array of available curve names.
Below programs illustrate the openssl_get_curve_names() function in PHP.
Example:
PHP
<?php { //available curve names for ECC $curve_names = openssl_get_curve_names(); // print all curve names print_r($curve_names);} ?> |
Output:
Array ( [0] => secp112r1 [1] => secp112r2 [2] => secp128r1 [3] => secp128r2 [4] => secp160k1 [5] => secp160r1 [6] => secp160r2 [7] => secp192k1 [8] => secp224k1 [9] => secp224r1 [10] => secp256k1 [11] => secp384r1 [12] => secp521r1 [13] => prime192v1 [14] => prime192v2 [15] => prime192v3 [16] => prime239v1 [17] => prime239v2 [18] => prime239v3 [19] => prime256v1 [20] => sect113r1 [21] => sect113r2 [22] => sect131r1 [23] => sect131r2 [24] => sect163k1 [25] => sect163r1 [26] => sect163r2 [27] => sect193r1 [28] => sect193r2 [29] => sect233k1 [30] => sect233r1 [31] => sect239k1 [32] => sect283k1 [33] => sect283r1 [34] => sect409k1 [35] => sect409r1 [36] => sect571k1 [37] => sect571r1 [38] => c2pnb163v1 [39] => c2pnb163v2 [40] => c2pnb163v3 [41] => c2pnb176v1 [42] => c2tnb191v1 [43] => c2tnb191v2 [44] => c2tnb191v3 [45] => c2pnb208w1 [46] => c2tnb239v1 [47] => c2tnb239v2 [48] => c2tnb239v3 [49] => c2pnb272w1 [50] => c2pnb304w1 [51] => c2tnb359v1 [52] => c2pnb368w1 [53] => c2tnb431r1 [54] => wap-wsg-idm-ecid-wtls1 [55] => wap-wsg-idm-ecid-wtls3 [56] => wap-wsg-idm-ecid-wtls4 [57] => wap-wsg-idm-ecid-wtls5 [58] => wap-wsg-idm-ecid-wtls6 [59] => wap-wsg-idm-ecid-wtls7 [60] => wap-wsg-idm-ecid-wtls8 [61] => wap-wsg-idm-ecid-wtls9 [62] => wap-wsg-idm-ecid-wtls10 [63] => wap-wsg-idm-ecid-wtls11 [64] => wap-wsg-idm-ecid-wtls12 [65] => Oakley-EC2N-3 [66] => Oakley-EC2N-4 [67] => brainpoolP160r1 [68] => brainpoolP160t1 [69] => brainpoolP192r1 [70] => brainpoolP192t1 [71] => brainpoolP224r1 [72] => brainpoolP224t1 [73] => brainpoolP256r1 [74] => brainpoolP256t1 [75] => brainpoolP320r1 [76] => brainpoolP320t1 [77] => brainpoolP384r1 [78] => brainpoolP384t1 [79] => brainpoolP512r1 [80] => brainpoolP512t1 [81] => SM2 )
Reference: https://www.php.net/manual/en/function.openssl-get-curve-names.php
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