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Merge pull request #639 from moisesguimaraes/fixes-srp-priv-key-size

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fixes random keys size ('a' and 'b')
This commit is contained in:
Kaleb Himes
2016-11-21 15:59:32 -07:00
committed by GitHub
parent b380eef3e2 64fc68920d
commit b61e6e1219
2 changed files with 6 additions and 3 deletions
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4
wolfcrypt/src/srp.c
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@ -322,7 +322,7 @@ int wc_SrpSetParams(Srp* srp, const byte* N, word32 nSz,
if (mp_read_unsigned_bin(&srp->N, N, nSz) != MP_OKAY) if (mp_read_unsigned_bin(&srp->N, N, nSz) != MP_OKAY)
return MP_READ_E; return MP_READ_E;
if (mp_count_bits(&srp->N) < SRP_DEFAULT_MIN_BITS) if (mp_count_bits(&srp->N) < SRP_MODULUS_MIN_BITS)
return BAD_FUNC_ARG; return BAD_FUNC_ARG;
/* Set g */ /* Set g */
@ -512,7 +512,7 @@ int wc_SrpGetPublic(Srp* srp, byte* pub, word32* size)
/* priv = random() */ /* priv = random() */
if (mp_iszero(&srp->priv) == MP_YES) if (mp_iszero(&srp->priv) == MP_YES)
r = wc_SrpGenPrivate(srp, pub, modulusSz); r = wc_SrpGenPrivate(srp, pub, SRP_PRIVATE_KEY_MIN_BITS / 8);
/* client side: A = g ^ a % N */ /* client side: A = g ^ a % N */
if (srp->side == SRP_CLIENT_SIDE) { if (srp->side == SRP_CLIENT_SIDE) {

5
wolfssl/wolfcrypt/srp.h
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@ -49,7 +49,10 @@
#endif #endif
/* Set the minimum number of bits acceptable in an SRP modulus */ /* Set the minimum number of bits acceptable in an SRP modulus */
#define SRP_DEFAULT_MIN_BITS 512 #define SRP_MODULUS_MIN_BITS 512
/* Set the minimum number of bits acceptable for private keys (RFC 5054) */
#define SRP_PRIVATE_KEY_MIN_BITS 256
/** /**
* SRP side, client or server. * SRP side, client or server.