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Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
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Glenn Strauss
2022-12-16 10:47:15 -05:00
parent 2ff77119df
commit 369bfb94c5
1 changed files with 3 additions and 3 deletions
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2
library/ecp.c
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@ -774,7 +774,7 @@ static int mbedtls_ecp_sw_derive_y( const mbedtls_ecp_group *grp,
int parity_bit )
{
/* y^2 = x^3 + ax + b
* sqrt(w) = w^((p+1)/4) mod p (for prime p where p = 3 mod 4)
* y = sqrt(w) = w^((p+1)/4) mod p (for prime p where p = 3 mod 4)
*
* Note: this method for extracting square root does not validate that w
* was indeed a square so this function will return garbage in Y if X