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Data Structures | |
struct | SHA1Context |
This structure will hold context information for the SHA-1 hashing operation. More... | |
Defines | |
#define | SHA1HashSize 20 |
Enumerations | |
enum | { shaSuccess = 0, shaNull, shaInputTooLong, shaStateError } |
Functions | |
int | SHA1Input (SHA1Context *, const uint8_t *, unsigned int) |
SHA1Input. | |
int | SHA1Reset (SHA1Context *) |
SHA1Reset. | |
int | SHA1Result (SHA1Context *, uint8_t Message_Digest[SHA1HashSize]) |
SHA1Result. |
anonymous enum |
Definition at line 33 of file sha1.h.
00034 { 00035 shaSuccess = 0, 00036 shaNull, /* Null pointer parameter */ 00037 shaInputTooLong, /* input data too long */ 00038 shaStateError /* called Input after Result */ 00039 };
int SHA1Input | ( | SHA1Context * | context, | |
const uint8_t * | message_array, | |||
unsigned | length | |||
) |
SHA1Input.
context | [in/out] The SHA context to update | |
message_array | [in] An array of characters representing the next portion of the message. | |
length | [in] The length of the message in message_array. This function accepts an array of octets as the next portion of the message. |
Definition at line 154 of file sha1.c.
References context, SHA1ProcessMessageBlock(), shaNull, shaStateError, and shaSuccess.
Referenced by ast_sha1_hash().
00155 { 00156 if (!length) { 00157 return shaSuccess; 00158 } 00159 00160 if (!context || !message_array) { 00161 return shaNull; 00162 } 00163 00164 if (context->Computed) { 00165 context->Corrupted = shaStateError; 00166 return shaStateError; 00167 } 00168 00169 if (context->Corrupted) { 00170 return context->Corrupted; 00171 } 00172 00173 while (length-- && !context->Corrupted) { 00174 context->Message_Block[context->Message_Block_Index++] = (*message_array & 0xFF); 00175 00176 context->Length_Low += 8; 00177 if (context->Length_Low == 0) { 00178 context->Length_High++; 00179 if (context->Length_High == 0) { 00180 /* Message is too long */ 00181 context->Corrupted = 1; 00182 } 00183 } 00184 00185 if (context->Message_Block_Index == 64) { 00186 SHA1ProcessMessageBlock(context); 00187 } 00188 00189 message_array++; 00190 } 00191 00192 return shaSuccess; 00193 }
int SHA1Reset | ( | SHA1Context * | context | ) |
SHA1Reset.
context | the context to be reset. This function will initialize the SHA1Context in preparation for computing a new SHA1 message digest. |
Definition at line 81 of file sha1.c.
References context, shaNull, and shaSuccess.
Referenced by ast_sha1_hash().
00082 { 00083 if (!context) { 00084 return shaNull; 00085 } 00086 00087 context->Length_Low = 0; 00088 context->Length_High = 0; 00089 context->Message_Block_Index = 0; 00090 00091 context->Intermediate_Hash[0] = 0x67452301; 00092 context->Intermediate_Hash[1] = 0xEFCDAB89; 00093 context->Intermediate_Hash[2] = 0x98BADCFE; 00094 context->Intermediate_Hash[3] = 0x10325476; 00095 context->Intermediate_Hash[4] = 0xC3D2E1F0; 00096 00097 context->Computed = 0; 00098 context->Corrupted = 0; 00099 00100 return shaSuccess; 00101 }
int SHA1Result | ( | SHA1Context * | context, | |
uint8_t | Message_Digest[SHA1HashSize] | |||
) |
SHA1Result.
context | [in/out] The context to use to calculate the SHA-1 hash. | |
Message_Digest | [out] Where the digest is returned. This function will return the 160-bit message digest into the Message_Digest array provided by the caller. |
Definition at line 113 of file sha1.c.
References context, SHA1PadMessage(), shaNull, and shaSuccess.
Referenced by ast_sha1_hash().
00115 { 00116 int i; 00117 00118 if (!context || !Message_Digest) { 00119 return shaNull; 00120 } 00121 00122 if (context->Corrupted) { 00123 return context->Corrupted; 00124 } 00125 00126 if (!context->Computed) { 00127 SHA1PadMessage(context); 00128 for (i = 0; i < 64; ++i) { 00129 /* message may be sensitive, clear it out */ 00130 context->Message_Block[i] = 0; 00131 } 00132 context->Length_Low = 0; /* and clear length */ 00133 context->Length_High = 0; 00134 context->Computed = 1; 00135 } 00136 00137 for (i = 0; i < SHA1HashSize; ++i) { 00138 Message_Digest[i] = context->Intermediate_Hash[i >> 2] >> 8 * ( 3 - ( i & 0x03 ) ); 00139 } 00140 00141 return shaSuccess; 00142 }