ParagonIE_Sodium_Core_Curve25519::fe_tobytes( ParagonIE_Sodium_Core_Curve25519_Fe $h ): string

Parameters

$hParagonIE_Sodium_Core_Curve25519_Fe

Return

string

Uses · 2

• ParagonIE_Sodium_Core_Curve25519::mul()
• ParagonIE_Sodium_Core_Curve25519::intArrayToString()

Used by · 4

• ParagonIE_Sodium_Core_Curve25519::fe_isnegative()Is a field element negative? (1 = yes, 0 = no. Used in calculations.)
• ParagonIE_Sodium_Core_Curve25519::fe_isnonzero()Returns 0 if this field element results in all NUL bytes.
• ParagonIE_Sodium_Core_Curve25519::ge_p3_tobytes()
• ParagonIE_Sodium_Core_Curve25519::ge_tobytes()Convert a group element to a byte string.

Source

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192    public static function fe_tobytes(ParagonIE_Sodium_Core_Curve25519_Fe $h)193    {194        $h0 = (int) $h[0];195        $h1 = (int) $h[1];196        $h2 = (int) $h[2];197        $h3 = (int) $h[3];198        $h4 = (int) $h[4];199        $h5 = (int) $h[5];200        $h6 = (int) $h[6];201        $h7 = (int) $h[7];202        $h8 = (int) $h[8];203        $h9 = (int) $h[9];204 205        $q = (self::mul($h9, 19, 5) + (1 << 24)) >> 25;206        $q = ($h0 + $q) >> 26;207        $q = ($h1 + $q) >> 25;208        $q = ($h2 + $q) >> 26;209        $q = ($h3 + $q) >> 25;210        $q = ($h4 + $q) >> 26;211        $q = ($h5 + $q) >> 25;212        $q = ($h6 + $q) >> 26;213        $q = ($h7 + $q) >> 25;214        $q = ($h8 + $q) >> 26;215        $q = ($h9 + $q) >> 25;216 217        $h0 += self::mul($q, 19, 5);218 219        $carry0 = $h0 >> 26;220        $h1 += $carry0;221        $h0 -= $carry0 << 26;222        $carry1 = $h1 >> 25;223        $h2 += $carry1;224        $h1 -= $carry1 << 25;225        $carry2 = $h2 >> 26;226        $h3 += $carry2;227        $h2 -= $carry2 << 26;228        $carry3 = $h3 >> 25;229        $h4 += $carry3;230        $h3 -= $carry3 << 25;231        $carry4 = $h4 >> 26;232        $h5 += $carry4;233        $h4 -= $carry4 << 26;234        $carry5 = $h5 >> 25;235        $h6 += $carry5;236        $h5 -= $carry5 << 25;237        $carry6 = $h6 >> 26;238        $h7 += $carry6;239        $h6 -= $carry6 << 26;240        $carry7 = $h7 >> 25;241        $h8 += $carry7;242        $h7 -= $carry7 << 25;243        $carry8 = $h8 >> 26;244        $h9 += $carry8;245        $h8 -= $carry8 << 26;246        $carry9 = $h9 >> 25;247        $h9 -= $carry9 << 25;248 249        /**250         * @var array<int, int>251         */252        $s = array(253            (int) (($h0 >> 0) & 0xff),254            (int) (($h0 >> 8) & 0xff),255            (int) (($h0 >> 16) & 0xff),256            (int) ((($h0 >> 24) | ($h1 << 2)) & 0xff),257            (int) (($h1 >> 6) & 0xff),258            (int) (($h1 >> 14) & 0xff),259            (int) ((($h1 >> 22) | ($h2 << 3)) & 0xff),260            (int) (($h2 >> 5) & 0xff),261            (int) (($h2 >> 13) & 0xff),262            (int) ((($h2 >> 21) | ($h3 << 5)) & 0xff),263            (int) (($h3 >> 3) & 0xff),264            (int) (($h3 >> 11) & 0xff),265            (int) ((($h3 >> 19) | ($h4 << 6)) & 0xff),266            (int) (($h4 >> 2) & 0xff),267            (int) (($h4 >> 10) & 0xff),268            (int) (($h4 >> 18) & 0xff),269            (int) (($h5 >> 0) & 0xff),270            (int) (($h5 >> 8) & 0xff),271            (int) (($h5 >> 16) & 0xff),

History

Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 6.7.7 tag, from src/wp-includes/sodium_compat/src/Core/Curve25519.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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