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Data Structures | |
struct | SHA1Context |
This structure will hold context information for the SHA-1 hashing operation. More... | |
Defines | |
#define | _SHA_enum_ |
#define | SHA1HashSize 20 |
Typedefs | |
typedef struct SHA1Context | SHA1Context |
This structure will hold context information for the SHA-1 hashing operation. | |
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. |
#define SHA1HashSize 20 |
Definition at line 41 of file sha1.h.
Referenced by SHA1Result().
typedef struct SHA1Context SHA1Context |
This structure will hold context information for the SHA-1 hashing operation.
anonymous enum |
Definition at line 33 of file sha1.h.
{ shaSuccess = 0, shaNull, /* Null pointer parameter */ shaInputTooLong, /* input data too long */ shaStateError /* called Input after Result */ };
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 SHA1Context::Computed, SHA1Context::Corrupted, SHA1Context::Length_High, SHA1Context::Length_Low, SHA1Context::Message_Block, SHA1Context::Message_Block_Index, SHA1ProcessMessageBlock(), shaNull, shaStateError, and shaSuccess.
Referenced by ast_sha1_hash().
{ if (!length) { return shaSuccess; } if (!context || !message_array) { return shaNull; } if (context->Computed) { context->Corrupted = shaStateError; return shaStateError; } if (context->Corrupted) { return context->Corrupted; } while (length-- && !context->Corrupted) { context->Message_Block[context->Message_Block_Index++] = (*message_array & 0xFF); context->Length_Low += 8; if (context->Length_Low == 0) { context->Length_High++; if (context->Length_High == 0) { /* Message is too long */ context->Corrupted = 1; } } if (context->Message_Block_Index == 64) { SHA1ProcessMessageBlock(context); } message_array++; } return shaSuccess; }
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 SHA1Context::Computed, SHA1Context::Corrupted, SHA1Context::Intermediate_Hash, SHA1Context::Length_High, SHA1Context::Length_Low, SHA1Context::Message_Block_Index, shaNull, and shaSuccess.
Referenced by ast_sha1_hash().
{ if (!context) { return shaNull; } context->Length_Low = 0; context->Length_High = 0; context->Message_Block_Index = 0; context->Intermediate_Hash[0] = 0x67452301; context->Intermediate_Hash[1] = 0xEFCDAB89; context->Intermediate_Hash[2] = 0x98BADCFE; context->Intermediate_Hash[3] = 0x10325476; context->Intermediate_Hash[4] = 0xC3D2E1F0; context->Computed = 0; context->Corrupted = 0; return shaSuccess; }
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 SHA1Context::Computed, SHA1Context::Corrupted, SHA1Context::Intermediate_Hash, SHA1Context::Length_High, SHA1Context::Length_Low, SHA1Context::Message_Block, SHA1HashSize, SHA1PadMessage(), shaNull, and shaSuccess.
Referenced by ast_sha1_hash().
{ int i; if (!context || !Message_Digest) { return shaNull; } if (context->Corrupted) { return context->Corrupted; } if (!context->Computed) { SHA1PadMessage(context); for (i = 0; i < 64; ++i) { /* message may be sensitive, clear it out */ context->Message_Block[i] = 0; } context->Length_Low = 0; /* and clear length */ context->Length_High = 0; context->Computed = 1; } for (i = 0; i < SHA1HashSize; ++i) { Message_Digest[i] = context->Intermediate_Hash[i >> 2] >> 8 * ( 3 - ( i & 0x03 ) ); } return shaSuccess; }