1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
6 * The library is free for all purposes without any express
13 Integer to Octet I2OSP, Tom St Denis
18 /* always stores the same # of bytes, pads with leading zero bytes
23 PKCS #1 Integer to binary
24 @param n The integer to store
25 @param modulus_len The length of the RSA modulus
26 @param out [out] The destination for the integer
27 @return CRYPT_OK if successful
29 int pkcs_1_i2osp(void *n, unsigned long modulus_len, unsigned char *out)
33 size = mp_unsigned_bin_size(n);
35 if (size > modulus_len) {
36 return CRYPT_BUFFER_OVERFLOW;
40 zeromem(out, modulus_len);
41 return mp_to_unsigned_bin(n, out+(modulus_len-size));
44 #endif /* LTC_PKCS_1 */
47 /* ref: $Format:%D$ */
48 /* git commit: $Format:%H$ */
49 /* commit time: $Format:%ai$ */