Frank Denis
7 years ago
20 changed files with 152 additions and 2 deletions
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#include "crypto_core_ed25519.h" |
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#include "private/common.h" |
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#include "private/ed25519_ref10.h" |
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int |
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crypto_core_ed25519_add(unsigned char *r, |
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const unsigned char *p, const unsigned char *q) |
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{ |
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ge25519_p3 p_p3, q_p3, r_p3; |
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ge25519_p1p1 r_p1p1; |
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ge25519_cached q_cached; |
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if (ge25519_frombytes(&p_p3, p) != 0 || ge25519_is_on_curve(&p_p3) == 0 || |
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ge25519_frombytes(&q_p3, q) != 0 || ge25519_is_on_curve(&q_p3) == 0) { |
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return -1; |
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} |
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ge25519_p3_to_cached(&q_cached, &q_p3); |
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ge25519_add(&r_p1p1, &p_p3, &q_cached); |
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ge25519_p1p1_to_p3(&r_p3, &r_p1p1); |
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ge25519_p3_tobytes(r, &r_p3); |
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return 0; |
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} |
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int |
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crypto_core_ed25519_sub(unsigned char *r, |
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const unsigned char *p, const unsigned char *q) |
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{ |
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ge25519_p3 p_p3, q_p3, r_p3; |
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ge25519_p1p1 r_p1p1; |
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ge25519_cached q_cached; |
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if (ge25519_frombytes(&p_p3, p) != 0 || ge25519_is_on_curve(&p_p3) == 0 || |
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ge25519_frombytes(&q_p3, q) != 0 || ge25519_is_on_curve(&q_p3) == 0) { |
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return -1; |
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} |
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ge25519_p3_to_cached(&q_cached, &q_p3); |
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ge25519_sub(&r_p1p1, &p_p3, &q_cached); |
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ge25519_p1p1_to_p3(&r_p3, &r_p1p1); |
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ge25519_p3_tobytes(r, &r_p3); |
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return 0; |
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} |
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@ -0,0 +1,25 @@ |
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#ifndef crypto_core_ed25519_H |
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#define crypto_core_ed25519_H |
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#include <stddef.h> |
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#include "export.h" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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SODIUM_EXPORT |
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int crypto_core_ed25519_add(unsigned char *r, |
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const unsigned char *p, const unsigned char *q); |
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SODIUM_EXPORT |
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int crypto_core_ed25519_sub(unsigned char *r, |
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const unsigned char *p, const unsigned char *q); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif |
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