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SSH KDF NoPad
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1. Change wc_SSH_KDF to wc_SSH_KDF_ex with a new parameter to enable
   padding the k value or not.
2. Add new wc_SSH_KDF function that calls wc_SSH_KDF_ex with the k pad
   switch set to 1
3. Add new wc_SSH_KDF_NoPad function that calls wc_SSH_KDF_ex with the k pad
   switch set to 0.
4. Change the padding to treat the k pad switch as a boolean and always
   hash in the pad byte, as length 1 or 0.
5. Revise the comments for the SSH_KDF test to better indicate the
   source of the test vectors.
6. Add a set of test cases using a value for K that would require
   padding if padding is enabled.
7. Rework the test case setup to use macro composition.
8. Test both wc_SSH_KDF and wc_SSH_KDF_NoPad as appropriate for padding.
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@ejohnstown
ejohnstown committed Jul 29, 2024
1 parent b1765ca commit a9bc1f8
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Showing 3 changed files with 196 additions and 59 deletions.
37 changes: 26 additions & 11 deletions wolfcrypt/src/kdf.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -797,14 +797,14 @@ void _HashFree(byte hashId, _hash* hash)

#define LENGTH_SZ 4

int wc_SSH_KDF(byte hashId, byte keyId, byte* key, word32 keySz,
static int wc_SSH_KDF_ex(byte hashId, byte keyId, byte* key, word32 keySz,
const byte* k, word32 kSz, const byte* h, word32 hSz,
const byte* sessionId, word32 sessionIdSz)
const byte* sessionId, word32 sessionIdSz, int padK)
{
word32 blocks, remainder;
_hash hash;
enum wc_HashType enmhashId = (enum wc_HashType)hashId;
byte kPad = 0;
byte kPadSz = 0;
byte pad = 0;
byte kSzFlat[LENGTH_SZ];
word32 digestSz;
Expand All @@ -824,17 +824,17 @@ int wc_SSH_KDF(byte hashId, byte keyId, byte* key, word32 keySz,
}
digestSz = (word32)ret;

if (k[0] & 0x80) kPad = 1;
c32toa(kSz + kPad, kSzFlat);
kPadSz = (k[0] & 0x80) && padK;
c32toa(kSz + kPadSz, kSzFlat);

blocks = keySz / digestSz;
remainder = keySz % digestSz;

ret = _HashInit(enmhashId, &hash);
if (ret == 0)
ret = _HashUpdate(enmhashId, &hash, kSzFlat, LENGTH_SZ);
if (ret == 0 && kPad)
ret = _HashUpdate(enmhashId, &hash, &pad, 1);
if (ret == 0)
ret = _HashUpdate(enmhashId, &hash, &pad, kPadSz);
if (ret == 0)
ret = _HashUpdate(enmhashId, &hash, k, kSz);
if (ret == 0)
Expand Down Expand Up @@ -864,8 +864,7 @@ int wc_SSH_KDF(byte hashId, byte keyId, byte* key, word32 keySz,
if (ret != 0) break;
ret = _HashUpdate(enmhashId, &hash, kSzFlat, LENGTH_SZ);
if (ret != 0) break;
if (kPad)
ret = _HashUpdate(enmhashId, &hash, &pad, 1);
ret = _HashUpdate(enmhashId, &hash, &pad, kPadSz);
if (ret != 0) break;
ret = _HashUpdate(enmhashId, &hash, k, kSz);
if (ret != 0) break;
Expand All @@ -884,8 +883,8 @@ int wc_SSH_KDF(byte hashId, byte keyId, byte* key, word32 keySz,
ret = _HashInit(enmhashId, &hash);
if (ret == 0)
ret = _HashUpdate(enmhashId, &hash, kSzFlat, LENGTH_SZ);
if (ret == 0 && kPad)
ret = _HashUpdate(enmhashId, &hash, &pad, 1);
if (ret == 0)
ret = _HashUpdate(enmhashId, &hash, &pad, kPadSz);
if (ret == 0)
ret = _HashUpdate(enmhashId, &hash, k, kSz);
if (ret == 0)
Expand All @@ -905,6 +904,22 @@ int wc_SSH_KDF(byte hashId, byte keyId, byte* key, word32 keySz,
return ret;
}

int wc_SSH_KDF(byte hashId, byte keyId, byte* key, word32 keySz,
const byte* k, word32 kSz, const byte* h, word32 hSz,
const byte* sessionId, word32 sessionIdSz)
{
return wc_SSH_KDF_ex(hashId, keyId, key, keySz,
k, kSz, h, hSz, sessionId, sessionIdSz, 1);
}

int wc_SSH_KDF_NoPad(byte hashId, byte keyId, byte* key, word32 keySz,
const byte* k, word32 kSz, const byte* h, word32 hSz,
const byte* sessionId, word32 sessionIdSz)
{
return wc_SSH_KDF_ex(hashId, keyId, key, keySz,
k, kSz, h, hSz, sessionId, sessionIdSz, 0);
}

#endif /* WOLFSSL_WOLFSSH */

#ifdef WC_SRTP_KDF
Expand Down
212 changes: 164 additions & 48 deletions wolfcrypt/test/test.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -26796,11 +26796,17 @@ typedef struct {
word32 sessionIdSz;
const byte* expectedKey;
word32 expectedKeySz;
int padK;
} SshKdfTestVector;


/** Test Vector Set #3: SHA-256 **/
static const byte sshKdfTvSet3k[] = {
/** Test Vector Data from CAVP Testing: Individual Component Testing **/
/** SP 800-135: SSH Test Vectors **/

/** Test Vector Set #1: SHA-256, COUNT = 0 **/
/** Shared Secret Length = 2048 **/
/** IV length = 128, Encrypt Key Length = 128 **/
static const byte sshKdfTvSet1k[] = {
0x6A, 0xC3, 0x82, 0xEA, 0xAC, 0xA0, 0x93, 0xE1,
0x25, 0xE2, 0x5C, 0x24, 0xBE, 0xBC, 0x84, 0x64,
0x0C, 0x11, 0x98, 0x75, 0x07, 0x34, 0x4B, 0x5C,
Expand Down Expand Up @@ -26834,78 +26840,179 @@ static const byte sshKdfTvSet3k[] = {
0xAE, 0x1B, 0x0E, 0x7D, 0x36, 0x03, 0xA5, 0x56,
0xA1, 0x32, 0x62, 0xFF, 0x62, 0x8D, 0xE2, 0x22
};
static const byte sshKdfTvSet3h[] = {
static const byte sshKdfTvSet1h[] = {
0x7B, 0x70, 0x01, 0x18, 0x5E, 0x25, 0x6D, 0x44,
0x93, 0x44, 0x5F, 0x39, 0xA5, 0x5F, 0xB9, 0x05,
0xE6, 0x32, 0x1F, 0x4B, 0x5D, 0xD8, 0xBB, 0xF3,
0x10, 0x0D, 0x51, 0xBA, 0x0B, 0xDA, 0x3D, 0x2D
};
static const byte sshKdfTvSet3sid[] = {
static const byte sshKdfTvSet1sid[] = {
0x7B, 0x70, 0x01, 0x18, 0x5E, 0x25, 0x6D, 0x44,
0x93, 0x44, 0x5F, 0x39, 0xA5, 0x5F, 0xB9, 0x05,
0xE6, 0x32, 0x1F, 0x4B, 0x5D, 0xD8, 0xBB, 0xF3,
0x10, 0x0D, 0x51, 0xBA, 0x0B, 0xDA, 0x3D, 0x2D
};
static const byte sshKdfTvSet3a[] = {
static const byte sshKdfTvSet1aPadded[] = {
0x81, 0xF0, 0x33, 0x0E, 0xF6, 0xF0, 0x53, 0x61,
0xB3, 0x82, 0x3B, 0xFD, 0xED, 0x6E, 0x1D, 0xE9
};
static const byte sshKdfTvSet3b[] = {
static const byte sshKdfTvSet1bPadded[] = {
0x3F, 0x6F, 0xD2, 0x06, 0x5E, 0xEB, 0x2B, 0x0B,
0x1D, 0x93, 0x19, 0x5A, 0x1F, 0xED, 0x48, 0xA5
};
static const byte sshKdfTvSet3c[] = {
static const byte sshKdfTvSet1cPadded[] = {
0xC3, 0x54, 0x71, 0x03, 0x4E, 0x6F, 0xD6, 0x54,
0x76, 0x13, 0x17, 0x8E, 0x23, 0x43, 0x5F, 0x21
};
static const byte sshKdfTvSet3d[] = {
static const byte sshKdfTvSet1dPadded[] = {
0x7E, 0x9D, 0x79, 0x03, 0x20, 0x90, 0xD9, 0x9F,
0x98, 0xB0, 0x15, 0x63, 0x4D, 0xD9, 0xF4, 0x62
};
static const byte sshKdfTvSet3e[] = {
static const byte sshKdfTvSet1ePadded[] = {
0x24, 0xEE, 0x55, 0x9A, 0xD7, 0xCE, 0x71, 0x2B,
0x68, 0x5D, 0x0B, 0x22, 0x71, 0xE4, 0x43, 0xC1,
0x7A, 0xB1, 0xD1, 0xDC, 0xEB, 0x5A, 0x36, 0x05,
0x69, 0xD2, 0x5D, 0x5D, 0xC2, 0x43, 0x00, 0x2F
};
static const byte sshKdfTvSet3f[] = {
static const byte sshKdfTvSet1fPadded[] = {
0xC3, 0x41, 0x9C, 0x2B, 0x96, 0x62, 0x35, 0x86,
0x9D, 0x71, 0x4B, 0xA5, 0xAC, 0x48, 0xDD, 0xB7,
0xD9, 0xE3, 0x5C, 0x8C, 0x19, 0xAA, 0xC7, 0x34,
0x22, 0x33, 0x7A, 0x37, 0x34, 0x53, 0x60, 0x7E
};

/** Test Vector Set #2: SHA-256, COUNT = 2 **/
/** Shared Secret Length = 2048 **/
/** IV length = 128, Encrypt Key Length = 128 **/
static const byte sshKdfTvSet2k[] = {
0x9B, 0x1C, 0x63, 0x72, 0x86, 0x72, 0x0D, 0x11,
0xA9, 0x03, 0x02, 0x60, 0xE3, 0x57, 0x26, 0x62,
0x1F, 0x54, 0x11, 0x55, 0x60, 0xC4, 0x43, 0xDE,
0xD9, 0x8D, 0x56, 0x22, 0xF4, 0x00, 0x7C, 0xB6,
0x54, 0x27, 0xBA, 0x8A, 0xE0, 0x83, 0x1F, 0x34,
0x45, 0x23, 0x49, 0x99, 0x3C, 0x74, 0x93, 0x34,
0x66, 0xF3, 0x30, 0x7E, 0x11, 0x45, 0x21, 0x50,
0xF4, 0x64, 0x00, 0x10, 0xED, 0x7D, 0x1A, 0xB8,
0x76, 0x56, 0x23, 0x2D, 0x96, 0x59, 0xD9, 0x98,
0x2E, 0x82, 0x27, 0xC2, 0x5D, 0x64, 0x81, 0x89,
0xD2, 0xBD, 0xDA, 0x32, 0x83, 0xAA, 0x5D, 0xEC,
0x8A, 0x21, 0x05, 0xAF, 0x0F, 0xA8, 0x40, 0x59,
0x2A, 0x21, 0xD9, 0x6E, 0xEB, 0xB9, 0x32, 0xF8,
0xFF, 0x36, 0xF9, 0x4A, 0x2E, 0x4F, 0xC3, 0x81,
0x9D, 0x7C, 0x9F, 0x0D, 0x26, 0xA4, 0x72, 0xFB,
0x5A, 0xE5, 0xA4, 0x3A, 0x2D, 0x49, 0x06, 0x24,
0x7D, 0x59, 0xC4, 0x25, 0x12, 0xDD, 0xA2, 0x52,
0x20, 0x5F, 0x60, 0x04, 0x2E, 0x19, 0x00, 0xE1,
0x58, 0x11, 0x27, 0xF2, 0x5A, 0xCE, 0x25, 0x3B,
0x62, 0xA8, 0x3F, 0x62, 0xD4, 0x70, 0x32, 0x81,
0xA2, 0x94, 0xF2, 0x40, 0xDF, 0x2A, 0xA3, 0x4D,
0xDF, 0x43, 0x7C, 0x9F, 0x27, 0x82, 0x78, 0x12,
0x0B, 0xC1, 0x0E, 0x2C, 0xB9, 0x9F, 0x78, 0x04,
0xEC, 0xD6, 0x74, 0x1B, 0x1B, 0xE5, 0x52, 0x0C,
0x55, 0x3C, 0xB8, 0x97, 0x47, 0xF7, 0x9B, 0x4E,
0x4E, 0xFD, 0x3C, 0xF0, 0x9B, 0x48, 0x4E, 0xB1,
0xEB, 0x03, 0x4D, 0x22, 0x0D, 0xA4, 0x57, 0x54,
0x6A, 0x2E, 0xBB, 0x28, 0xD7, 0xF2, 0xFA, 0xF6,
0x7D, 0xE0, 0x63, 0x07, 0x57, 0xB8, 0xAE, 0x05,
0xE2, 0x7A, 0x76, 0x19, 0x56, 0xD2, 0xE1, 0x90,
0xFE, 0x3F, 0xB9, 0x3B, 0x1C, 0x7C, 0x14, 0x2F,
0x62, 0xBA, 0xEB, 0x08, 0x97, 0x21, 0xCE, 0xDC
};
static const byte sshKdfTvSet2h[] = {
0xCA, 0xD4, 0x07, 0xA8, 0x23, 0x55, 0x17, 0x26,
0xF9, 0xBD, 0xCB, 0x78, 0xE8, 0xF3, 0x51, 0x53,
0x6E, 0x44, 0x06, 0xE8, 0xEE, 0x64, 0x94, 0x7E,
0xCC, 0x00, 0x74, 0x66, 0x2C, 0x7C, 0x04, 0x62
};
static const byte sshKdfTvSet2sid[] = {
0xA9, 0xC8, 0x20, 0x76, 0x42, 0x62, 0x7E, 0x6E,
0xE8, 0x72, 0x99, 0x91, 0x23, 0xB2, 0x9E, 0x36,
0xAB, 0xFD, 0xD0, 0x71, 0xDB, 0xA3, 0x6E, 0xA6,
0xF0, 0xC1, 0x1D, 0xD5, 0x9E, 0xA4, 0x64, 0x10
};
static const byte sshKdfTvSet2aPadded[] = {
0x32, 0xD2, 0x0A, 0x3F, 0x5E, 0x92, 0xB2, 0x0F,
0xE1, 0x00, 0xF4, 0xF4, 0x1A, 0x1A, 0xD5, 0x3C
};
static const byte sshKdfTvSet2bPadded[] = {
0xC3, 0xA3, 0xFF, 0x57, 0xF9, 0x91, 0x87, 0xBA,
0x01, 0x1F, 0xD4, 0x22, 0x10, 0x0A, 0xF5, 0x77
};
static const byte sshKdfTvSet2cPadded[] = {
0x85, 0x17, 0x90, 0x3C, 0x49, 0xD5, 0xA5, 0x9A,
0xD8, 0xEF, 0x7C, 0xD8, 0x59, 0x1C, 0x6B, 0x5E
};
static const byte sshKdfTvSet2dPadded[] = {
0xA5, 0xAD, 0x20, 0x11, 0x01, 0xA6, 0x17, 0xF1,
0xCD, 0x5B, 0x3A, 0x2B, 0xAA, 0x3B, 0x27, 0xF7
};
static const byte sshKdfTvSet2ePadded[] = {
0x16, 0x74, 0x7A, 0x23, 0xFD, 0xDD, 0x72, 0xF7,
0x85, 0xC5, 0xD6, 0x1D, 0xFB, 0x81, 0xA5, 0xA3,
0x85, 0x55, 0xF5, 0xD8, 0xFF, 0x1D, 0xC5, 0xAE,
0x4F, 0xB4, 0x23, 0xB8, 0x2A, 0xDF, 0xE0, 0x5B
};
static const byte sshKdfTvSet2fPadded[] = {
0xB1, 0xB1, 0xBB, 0xA8, 0x96, 0xB0, 0xFD, 0x75,
0xA9, 0x01, 0x87, 0xEA, 0xE6, 0xCD, 0xF7, 0x44,
0xD2, 0x38, 0x84, 0xCA, 0xA5, 0xF4, 0xCA, 0x97,
0x9C, 0xED, 0x32, 0x7C, 0xA1, 0x23, 0x97, 0x71
};
/** The following check results do not use padding. **/
static const byte sshKdfTvSet2aAlt[] = {
0xE2, 0x0E, 0xC3, 0xE5, 0x9E, 0x2A, 0x6B, 0x5D,
0x05, 0x35, 0x17, 0xAE, 0x38, 0x38, 0x0D, 0x89
};
static const byte sshKdfTvSet2bAlt[] = {
0x66, 0x34, 0xF1, 0x43, 0x24, 0x0B, 0x5C, 0x0C,
0xCE, 0x6E, 0xB0, 0x1B, 0xFE, 0xF4, 0xC1, 0x25
};
static const byte sshKdfTvSet2cAlt[] = {
0x09, 0x80, 0xC3, 0xA6, 0x9A, 0x66, 0x5C, 0xD3,
0x36, 0x56, 0xF9, 0x22, 0x64, 0x0D, 0xB5, 0x95
};
static const byte sshKdfTvSet2dAlt[] = {
0x29, 0xDA, 0x40, 0x6F, 0x40, 0x5C, 0x00, 0x40,
0xA8, 0x64, 0x0A, 0x5D, 0x7E, 0xB1, 0xCE, 0x5F
};
static const byte sshKdfTvSet2eAlt[] = {
0x88, 0x35, 0xD1, 0xFF, 0x84, 0xE8, 0x5A, 0x7A,
0xA1, 0x1B, 0x33, 0x9D, 0xF5, 0x01, 0xFD, 0x67,
0x8F, 0xD8, 0xFF, 0xDE, 0x51, 0x6E, 0x27, 0x15,
0x92, 0x10, 0x84, 0xB3, 0x9C, 0x43, 0xF7, 0xEE
};
static const byte sshKdfTvSet2fAlt[] = {
0x30, 0x7F, 0x78, 0x37, 0xC8, 0x82, 0x29, 0x0A,
0xB0, 0xDE, 0xDD, 0x8B, 0x45, 0x37, 0x71, 0xD9,
0xB1, 0x16, 0x6E, 0x3B, 0x38, 0x89, 0x0F, 0xC6,
0x66, 0x9D, 0x44, 0x94, 0x5B, 0x2F, 0xA3, 0x93
};

#define SSH_TC_PAD 1

#define SSH_TC_COMPOSE_NAME(set,ext) sshKdfTvSet##set##ext
#define SSH_TC_COMPOSE_NAME_VAR(set,ext,var) sshKdfTvSet##set##ext##var
#define SSH_TC_COMPOSE_PAIR(name) name, sizeof(name)
#define SSH_TC_COMPOSE_VEC(val,set,sec,pad,var) \
{WC_HASH_TYPE_SHA256, val, \
SSH_TC_COMPOSE_PAIR(SSH_TC_COMPOSE_NAME(set,k)), \
SSH_TC_COMPOSE_PAIR(SSH_TC_COMPOSE_NAME(set,h)), \
SSH_TC_COMPOSE_PAIR(SSH_TC_COMPOSE_NAME(set,sid)), \
SSH_TC_COMPOSE_PAIR(SSH_TC_COMPOSE_NAME_VAR(set,sec,var)), \
pad}
#define SSH_TC_COMPOSE_VEC_SET(set,pad,var) \
SSH_TC_COMPOSE_VEC('A',set,a,pad,var),\
SSH_TC_COMPOSE_VEC('B',set,b,pad,var),\
SSH_TC_COMPOSE_VEC('C',set,c,pad,var),\
SSH_TC_COMPOSE_VEC('D',set,d,pad,var),\
SSH_TC_COMPOSE_VEC('E',set,e,pad,var),\
SSH_TC_COMPOSE_VEC('F',set,f,pad,var)

static const SshKdfTestVector sshKdfTestVectors[] = {
{WC_HASH_TYPE_SHA256, 'A',
sshKdfTvSet3k, sizeof(sshKdfTvSet3k),
sshKdfTvSet3h, sizeof(sshKdfTvSet3h),
sshKdfTvSet3sid, sizeof(sshKdfTvSet3sid),
sshKdfTvSet3a, sizeof(sshKdfTvSet3a)},
{WC_HASH_TYPE_SHA256, 'B',
sshKdfTvSet3k, sizeof(sshKdfTvSet3k),
sshKdfTvSet3h, sizeof(sshKdfTvSet3h),
sshKdfTvSet3sid, sizeof(sshKdfTvSet3sid),
sshKdfTvSet3b, sizeof(sshKdfTvSet3b)},
{WC_HASH_TYPE_SHA256, 'C',
sshKdfTvSet3k, sizeof(sshKdfTvSet3k),
sshKdfTvSet3h, sizeof(sshKdfTvSet3h),
sshKdfTvSet3sid, sizeof(sshKdfTvSet3sid),
sshKdfTvSet3c, sizeof(sshKdfTvSet3c)},
{WC_HASH_TYPE_SHA256, 'D',
sshKdfTvSet3k, sizeof(sshKdfTvSet3k),
sshKdfTvSet3h, sizeof(sshKdfTvSet3h),
sshKdfTvSet3sid, sizeof(sshKdfTvSet3sid),
sshKdfTvSet3d, sizeof(sshKdfTvSet3d)},
{WC_HASH_TYPE_SHA256, 'E',
sshKdfTvSet3k, sizeof(sshKdfTvSet3k),
sshKdfTvSet3h, sizeof(sshKdfTvSet3h),
sshKdfTvSet3sid, sizeof(sshKdfTvSet3sid),
sshKdfTvSet3e, sizeof(sshKdfTvSet3e)},
{WC_HASH_TYPE_SHA256, 'F',
sshKdfTvSet3k, sizeof(sshKdfTvSet3k),
sshKdfTvSet3h, sizeof(sshKdfTvSet3h),
sshKdfTvSet3sid, sizeof(sshKdfTvSet3sid),
sshKdfTvSet3f, sizeof(sshKdfTvSet3f)},
SSH_TC_COMPOSE_VEC_SET(1,SSH_TC_PAD,Padded),
SSH_TC_COMPOSE_VEC_SET(1,!SSH_TC_PAD,Padded),
SSH_TC_COMPOSE_VEC_SET(2,SSH_TC_PAD,Padded),
SSH_TC_COMPOSE_VEC_SET(2,!SSH_TC_PAD,Alt),
};


Expand All @@ -26920,23 +27027,32 @@ WOLFSSL_TEST_SUBROUTINE wc_test_ret_t sshkdf_test(void)

/* sId - Session ID, eKey - Expected Key, cKey - Calculated Key */
for (i = 0, tv = sshKdfTestVectors; i < tc; i++, tv++) {
result = wc_SSH_KDF(tv->hashId, tv->keyId,
cKey, tv->expectedKeySz,
tv->k, tv->kSz, tv->h, tv->hSz,
tv->sessionId, tv->sessionIdSz);
if (tv->padK) {
result = wc_SSH_KDF(tv->hashId, tv->keyId,
cKey, tv->expectedKeySz,
tv->k, tv->kSz, tv->h, tv->hSz,
tv->sessionId, tv->sessionIdSz);
}
else {
result = wc_SSH_KDF_NoPad(tv->hashId, tv->keyId,
cKey, tv->expectedKeySz,
tv->k, tv->kSz, tv->h, tv->hSz,
tv->sessionId, tv->sessionIdSz);
}

if (result != 0) {
printf("KDF: Could not derive key.\n");
printf("SSHKDF: Could not derive key.\n");
result = WC_TEST_RET_ENC_EC(result);
break;
}
else {
if (XMEMCMP(cKey, tv->expectedKey, tv->expectedKeySz) != 0) {
printf("KDF: Calculated Key does not match Expected Key.\n");
printf("SSHKDF: Calculated Key does not "
"match Expected Key.\n");
result = WC_TEST_RET_ENC_EC(result);
break;
}
}

if (result != 0) break;
}

return result;
Expand Down
6 changes: 6 additions & 0 deletions wolfssl/wolfcrypt/kdf.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -119,6 +119,12 @@ WOLFSSL_API int wc_SSH_KDF(byte hashId, byte keyId,
const byte* h, word32 hSz,
const byte* sessionId, word32 sessionIdSz);

WOLFSSL_API int wc_SSH_KDF_NoPad(byte hashId, byte keyId,
byte* key, word32 keySz,
const byte* k, word32 kSz,
const byte* h, word32 hSz,
const byte* sessionId, word32 sessionIdSz);

#endif /* WOLFSSL_WOLFSSH */

#ifdef WC_SRTP_KDF
Expand Down

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